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1.3. The analysis of scientifically-applied workings out in the field of supply by motor transport mineral oil

The basic economic problem of system nefteproduktoobespechenija - uninterrupted supply of consumers by mineral oil in demanded to - lichestve and assortment with the least expenses. As a final link of this system are gasoline stations (gas station) by consideration of questions of development of a network of the gas station it is necessary to start with economic feasibility at definition of rational placement of the gas station, their quantity and capacity (productivity).

Works of domestic and foreign scientists [11, 22, 27, 40, 62, 65, 179 and others] which can be conditionally divided into two basic directions are devoted the decision of the above-stated problem. The first of them covers a complex of the problems connected with a choice and a substantiation of parametres of the concrete gas station, an estimation of its economic efficiency, features of the technical equipment and others. The second direction - functioning and development of a network of the gas station, their rational placement which, on the one hand, should consider uncertainty of preferences of clientele (consumers), on the other hand, placement of suppliers of mineral oil (regional and regional bases, petroleum refineries, etc.). Considering interrelation and interference of the concrete gas station and a network into which it enters, in a number of researches both directions are considered collaterally.

For an estimation of a today's condition, we will track in chronological order the basic stages of development of the scientific and applied workings out devoted to maintenance by mineral oil of motor transport.

In the seventieth years by working out of perspective schemas of development of the gas station the greatest distribution technique giproneftetransa goskomnefteprodukta has received RSFSR which included following basic partitions:

The economic region is differentiated on areas and areas.

The network of the gas station is analyzed and congestion of each station is defined.

Number and motor transport structure on each category of a rolling stock is defined; number of categories - seven (lorries, buses, cars, etc.)

Quantitative analysis of development of motor transport on areas and areas of region for each year of the perspective period is carried out; growth of volumes gruzo - and volumes of passenger traffic, and also increase in intensity of movement is considered by transit.

For each gas station of area the quantity of mineral oil counting on one days is defined potrebnoe on prospect; calculation is manufactured on the basis of norms of the expense of fuel, number of "local" cars and daily average volume of transport work; all transit transport is considered in calculation.

The quantity of mineral oil counting on a single batch of one car by multiplication of container of a fuel tank on a use factor of this tank is defined. The petrol tank use factor is defined according to timekeeping.

The total number of batches a day (on the basis of indexes of partitions 5 and 6), and then for each settlement - potrebnoe diurnal number of batches pays off.

Placement of the gas station of region is manufactured with use of the theory of counts.

Distances between the gas station on motorways (I) are defined according to SNiP: one gas station through 30-50 kilometres or pay off under the formula:

Where And - intensity of movement of motor transport; and, s-empirical factors.

The stated technique, despite doubtless utility, has a number of essential lacks.

First, used positions of the theory of mass service mismatch model of functioning of the gas station, in particular, centre duration of service is taken over identical to all types of cars (г0 (5 = 4 mines), and a coefficient of irregularity of receipt of cars at the gas station - equal 1,5 (by results of short-term supervision).

Secondly, the model of placement of the gas station does not consider essential making expenses in spheres of operation of motor transport and the gas station from idle times of motor vehicles in turn on a batch and columns in the absence of motor vehicles.

Thirdly, simple summation of "local" and "transit" cars considerably deforms quantity of batches.

Besides it application of the theory of counts for search of optimum placement of the gas station is debatable at any choice of some factors and restrictions.

In work [65] the formula for calculation of hour productivity of the gas station is offered:

Where p - number toplivorazdatochnyh columns (Broadcasting Company) on the gas station, a unit; к3 - factor of a simultaneity of a batch at all Broadcasting Company; tsht - time of a batch of one car.

For definition gsht the formula is used:

Where tpodg - preparatory time for an entrance to Broadcasting Company and pistol installation in throat of a fuel tank;

т0рг - Organizational time for the approach of the driver to cash desk of the gas station and is revertive to the car, decor and calculation for a batch;

W - Broadcasting Company operating time (immediately batch);

Tzakl ~ final time for pistol installation for the case of a column and departure from the gas station.

It is taken over, that tpodg - tzakl and changes in limits from 8 to 18 with; tteh = 1 minutes

Despite simplicity and convenience to the calculation, the offered dependences do not consider a number of following essential factors:

Does not open influence of many factors on time making formulas (1.3);

Considers the specified components determined and equal for all types of cars;

Use factor edinovremennosti the batches which definition is complicated.

The essential contribution to the decision of problems of placement and gas station operation has been made in works [62, 65]. The model named authors has been put In a basis «likelihood, parametrical». According to [62, 65] the gas station is considered only as the system of mass service (SMO) with an unlimited waiting time, thus is required performance of two conditions: each gas station is estimated individually; the statistical data used in calculations, are going for the yielded gas station.

For yielded SMO with expectation performance of a following inequality is necessary:

I »т0б min (1Л2)

p

Where p - number of points in which the gas stations take places.

Under condition of performance of some restrictions, expressions for optimum number of batches a day (minimum for the yielded point of placement of the gas station) are received

AND.

N = X - ^L (1.13)

About 4с

And quantities toplivorazdatochnyh columns

Q *N

To = (1.14)

72000-t/

In formulas (1.13), (1.14) With, - cost of delivery of mineral oil to j - oh the gas station;

At - quantity of motor transport in yielded//th point of placement of the gas station;

Л0 - Uncertain multiplier Lagranzha;

Qcp ~ a centre single filled dose of fuel, l;

77 - a column use factor.

In work of group of authors [40] the mathematical model and algorithm of the decision of a problem in network statement on optimisation studies of placement and gas station development on prospect within economic region (area) with COMPUTER application is resulted. For criterion of an optimality it is taken over a minimum of total expenses for building and gas station operation, delivery of mineral oil and motor transport operation. It is supposed, that there is an initial information on following components:

Points of an arrangement of a network of tank farms;

Points of the existing gas stations and possible points of building of the new gas stations;

Points of a concentration of cars in which there are various types of the rolling stock, differing the characteristics;

Distances between all above-stated objects are yielded. Besides it the requirement for concentration point pays off

The cars, expressed by quantity of batches a day taking into account transit transport, which korrespondiruetsja with volume of motor transportation works, intensity of movement on roads for transit transport, seasonal non-uniformity, norms of the expense of fuel, containers of tanks, fill factors of tanks and forecasts of increase in park of cars for prospect.

Mathematical statement of a problem looks as follows: (1.15)

up T t

Z (Sm- ti

At following restrictions:

m p

I (Qi+bQi+xit) + Z Qj-xjt^Pt (1.18)

/ = 1 7 = 1

Where Qu Qj - according to capacity of operating//th gas station \i = \, m\and under construction j-й the gas station | j = |;

R, - predicted value of level of realisation of PETROLEUM PRODUCTS in the set region in t-м to year 11 = 1, T |;

kts, kjt - accordingly capital investments in reconstruction and gas station building in t-м to year;

3,7, 3jt - gas station working costs;

AЭи-A gain of working costs at the reconstructed gas station;

AQit - an increment of capacity//th gas station in t-м to year;

En - standard effectiveness ratio of capital investments.

In the conclusion authors draw a conclusion, that the basic sources of reception of economic benefit are reduction of capital investments at the expense of a choice of optimum parametres of a variant of reconstruction (quantity of columns) and the operational expenses caused by decrease of costs from idle time of columns and motor vehicles in expectation of service.

Obvious advantage of model is its relative simplicity reached at the expense of use of integrated parametres, the gas stations describing functioning. Thus basic possibility of realisation prognoznogo designing of development of a network of the gas station of region by allocation of three indexes Q, to and E is proved, and also the idea about possibility of formation of models of various levels and their separate consideration is confirmed.

At the same time in work [11] it is not given attention to ways of reception of integrated indexes, in particular to capacity of the gas station and operational expenses E/. On the other hand, if these questions are not considered, the problem essence - gas station placement is lost, instead of any objects for which are known the above-stated parametres (are predicted). It allows to draw a conclusion, that idealisation of object researches (abstraction) has led to the formulation of the general problem of nonlinear programming with discrete variables.

In work [22] according to the author are found «... Essentially new paths of calculation of a perspective network of the gas station». The essence of an offered technique consists in the following:

Centre loading (realisation) of one gas station of a city or area pays off.

"Critical" points, in which realisation of mineral oil above the centre are defined.

On the basis of statistical data realisation of mineral oil through "critical" points is predicted.

Two primary goals of designing of a network of the gas station dare:

Definition of optimum quantity of the gas station and their rational placement on years till the end of the settlement period;

Definition potrebnogo quantity and rational placement of the gas station on years at restrictions on capital investments.

The algorithm of the decision is reduced to that in each "critical" point it is necessary to construct the additional stationary gas station in g-m to year. In the second problem of calculation of a perspective network of the gas station it is a question of reduction of overloads of the existing gas stations.

Optimum loading of the gas station define proceeding from the following concept: the more the gas station, the less loading of each of them and is less than loss

Motor transport time at a batch, but more resulted expenses for building and gas station operation. Hence, the resulted expenses for building and operation of a network of the gas station and motor transport loss at a batch will depend on quantity of the gas station and their loading.

To achieve the decision of tasks in view according to the author [22] it is possible at minimisation of two functions of the purpose:

Where Rjopt - optimum realisation of one AZSu ' th area or a city;

Pu - the resulted expenses for building and operation//th gas station at '-й areas;

ei - standard effectiveness ratio of capital investments;

Eu - working costs//th gas station, Eu = And + / () • SHCH;

f (r) - dependence of hauling charges on delivery 1 t mineral oil from a tank farm to the gas station on g distance, km;

Phu - losses of motor transport at the expense of throwaway run on a batch at an existing network of the gas station;

Unpij - motor transport losses at a batch at//th station.

The minimum, satisfying to both functions of the purpose, is defined in crosspoint:

Where And - a constant of working costs of the gas station (amortisation, a wages etc.);

(RiopJK) - quantity of batches at the gas station, changing in connection with network transformation;

t3 - Duration of one batch;

Sp - cost of 1 minute of idle time of motor transport of centre load-carrying capacity (under the price-list);

kn - a coefficient of irregularity of arrival of motor transport; PG

rk = I resulted radius of service of the gas station in area, harak -

i* vj

terizuemom in density of consumption of mineral oil at/,

Sh-cost of throwaway run of 1 km (under the price-list); ks the-factor considering discrepancy of a route of motor transport with a direction of movement on a batch.

According to «to the Price-list of the prices for transportation of cargoes by motor transport» (1985), With „= 0,025руб., With, = 0,12 rbl., / (= 0,43 + 0,14 t - 0,00095 •

In conclusion of article [22] it is underlined, that the decision of the equation (1.20) allows to receive optimum realisation of one gas station of j th area.

The stated approach demands the analysis on two main questions: in - the first, a choice of criterion for definition Riopt; secondly, the concept of the author about non-uniformity of loading of the various gas stations and necessity of its alignment.

Criterion of an optimality. In the yielded work idle times of cars on a batch are considered, i.e. the offered criterion is identical to the approach stated in works [62, 65, etc.]. However the analysis of the equation (1.20) shows, that

The left part of the equation has dimension of rbl./t, right - rbl.;

Summation operation on all//th gas station, necessary for calculation and network optimisation, is absent in the equation (1.20), concerning, in essence, to//th gas station;

Presence of several factors - kn, ks, at / - in the absence of techniques of their definition complicates use of the offered approach. It is obvious, that each of factors demands the corresponding inspections reflecting the past or the present condition of the gas station and the more so the approach to perspective calculations is not clear.

Non-uniformity of loading. The author does following conclusions of the analysis of statistical data: realisation of mineral oil at the gas station is in direct dependence on demand; non-uniformity of loading of the gas station testifies to their irrational placement.

It is obvious, that the first conclusion can be carried to any production and its realisation. The second conclusion is development of the first, since. Non-uniformity of loading is a reflexion of non-uniform demand and to a lesser degree speaks about irrationality of placement of the gas station. Therefore attempt of optimisation of a network of the gas station by loading averaging contradicts the tendency of their development reflecting non-uniformity of transport streams.

The approach to the decision of the analyzed problem, offered in the work [179], which purpose - «research of duties of the gas station and working out of scientifically proved design procedure of optimum quantity of the gas station and Broadcasting Company is worthy... Large cities and an estimation of their transmissive capacity». The author considers two groups of expenses: in system of the gas station and in motor transport sphere.

Expenses in gas station system include:

Expenses for a construction additional, expansion and reconstruction of the operating gas stations (it is received corresponding regressionnoe the equation);

Expenses for delivery of mineral oil from tank farms at the gas station (the decision of a transport problem);

Operational expenses on the networks of the gas station including the salary of attendants, all kinds of deductions, expenses for power supply of stations, losses of mineral oil, etc.

To costs in motor transport sphere are carried:

The expenses connected with throwaway run of motor transport to places of a batch (PETROLEUM PRODUCTS, tyres, maintenance service and repair, etc.);

Expenses from idle time of cars at the gas station in turn in expectation of a batch.

For the decision of a problem of definition of optimum capacity of the gas station at designing of a network of filling stations criterion function of expenses in a kind has been made

t ~ a4'R}

S = Ka\+ A2 - AND Ni + CrRi + a3Rf + (1.21)

/ = 1 Ni + bNi

Where t - number of points in which take places or the gas stations can be placed;

Nt, Nj - accordingly existing or additional number of Broadcasting Company on / ' th gas station;

R {-annual realisation of//th gas station; With, - - cost of delivery of mineral oil to / ' th gas station. ak - empirical factors, to = 4. For minimum search the method of uncertain multipliers Lagranzha is used.

The developed technique has been applied to designing of a network of the gas station of of Volgograd, thus the economic criterion of a choice of a variant of the gas station has been offered in a kind:

tk tk E = l (Pt-3t) ' at + l [(3xi-3xl) * (3 „i-3„ \)] *at (1.22)

tm t m

Where Pt - a cost estimation of results from use additional toplivorazdatochnyh columns (Broadcasting Company) and constructions of the new gas stations;

3t - a cost estimation of expenses for a construction of the new gas stations, reconstruction and operation of operating stations and introduction of new Broadcasting Company;

Zh - the costs connected with throwaway run of cars to the gas station; 3 „- the costs connected with idle time of cars at the gas station; at - factor of reduction of expenses occurring at different times and results of all years of the period of realisation of action by settlement year; tH, tk - initial and final years of the settlement period.

Essential advantage of work [179] is processing of significant files of the information, allowed to receive a number of empirical dependences which reflect features of work of the gas station, in particular:

Throwaway run of motor transport / (km), defined by a special technique, from annual realisation of gas station Rt (thousand)

1 = 0,071 + 0,0004 Ri; (1.23)

Mean time of service of one car t0 () from a centre dose of batch Qcp ()

t0 = 78 + 1,6 Qcp; (1.24)

Mean time of expectation of the car in turn at the gas station t,

t = + (-0,5 (1.25)

ozh 2

Where Lvh - intensity of an entrance stream of cars on one Broadcasting Company;

Transmissive capacity of the gas station And (a bus of a/h)

2 *N

And = 7л GT О-26)

Where N - number toplivorazdatochnyh columns at the gas station;

Т0 - Mean time of service of one car, Т0 = tJ3600, a h; Leh - intensity of an entrance stream of motor vehicles, a bus of a/h. The analysis of dependences (1.23) - (1.26) shows, that a number from them has debatable character. For example, about what "waiting time" there can be a speech if Broadcasting Company idle time is observed? How to explain, what mean time of service t0 in seconds (the formula (1.24)) is included into one dependence with Lvh, dimensional [a bus of a/h] (the formula (1.25))?

At record of formulas it is easy to prove obvious discrepancies on an example. We will admit, that Qcp = 30 l, and Hjh = 60 buses of a/h then at N=2 we will receive:. 2*2*3600

And = = 3,22 buses of a/h

(78 + 1,6* 30) * (60 + 4)-3600

ozh

Thus, transmissive capacity of the gas station in 20 times less than an entrance stream.

As a whole, characterising work [179], it is necessary to recognise presence of the progressive tendency: for increase of accuracy of feasibility reports it is necessary to combine theoretical and empirical approaches in settlement dependences.

The essential contribution to development of scientific bases and the decision of problems of a choice of parametres and placement of a network of the gas station have been made in work [148]. On the basis of the penetrating analysis of the executed researches, and also a considerable quantity of the collected and processed statistical material, the author managed to formulate new, basing on logistical principles, the approach.

So, at placement of the gas station of a city, «criterion of optimisation of functioning of logistical system are the full complex expenses of all its tehniko-technological elements considering influence of system on the city environment» (the account of an ecological damage). For the separate gas stations «optimisation of capacity of filling stations is carried out by criterion of a minimum of full complex expenses by the decision for each point separately on individual for them to characteristics of streams of cars entering on a batch; for the decision methods of imitating economic-statistical modelling» are used.

Thus, generalising results of the made analysis of existing references on a considered problem, it is possible to draw a conclusion, that in questions of a choice of key parametres at building new or modernisations of the existing gas stations are not present the uniform approach. The most comprehensible can consider a variant, at which gas station it is considered as system of mass service (SMO) with expectation. Essentially positions of the yielded approach are reduced to the following:

- The gas station is SMO with the turn, which length theoretically neosides - chena, since. It is supposed, that the car will not leave the gas station without a batch;

As a unique settlement mode gas station work at an o'clock "peak" is taken over, i.e. At the maximum intensity of a transport stream;

It is considered, that the gas station is equipped by toplivno-distributing columns (Broadcasting Company) and agrees SMO is multichannel system;

Batch time submits to the exponential law, is thus taken over, that volume of a batch of one car the constant;

As the basic economic criterion of a choice of optimum quantity of Broadcasting Company at the gas station equality of the costs connected with idle time of the car at the gas station, and charges of not loaded Broadcasting Company is taken over.

Meanwhile, researches of duties of the gas station show, that the approach set forth above has become outdated and does not answer modern market conditions at which in a root the structure of a motor pool and the general condition of a transportno-road complex has changed, there was ten thousand small cargo enterprises, a considerable quantity of paid parking and garage co-operative societies, the psychology of the driver etc. has changed. Therefore, for a choice of key parametres of again under construction or modernised gas stations it is necessary to consider a number of new positions.

First, only in rare instances the gas station works as SMO with unlimited length of turn. With the advent of the increasing quantity of batches (stationary, container and mobile), distance reduction between them and, as a rule, disappearance of deficiency of deliveries of mineral oil from regional (regional) bases, the gas station should be considered as SMO without turn or with the limited length of turn on number of cars in it or a waiting time on a batch. So, in large cities the quantity of the gas station makes not less than one on 8-10 km. Even under adverse conditions of placement the greatest distance between the gas station on a diagonal does not exceed 4.5 km, and at speed of car Va = 40 km/hour, movement time between the gas station will make 6-7 minutes Knowing it, the driver will choose for a batch of the gas station with the minimum turn.

Secondly, the number of analyzed duties of the gas station should be increased, thus only multiple calculation will allow to define an optimum duty of the concrete gas station.

Depending on time of days, day of week and month (season) of year the stream of cars on a batch changes over a wide range, i.e. three cyclic components with the different periods are summarised. Accordingly, the gas station duty also can be changed over a wide range at the expense of simultaneous inclusion of various quantity of Broadcasting Company, quantity of attendants (operators, cashiers), round-the-clock use of computerised Broadcasting Company with payment on credit cards etc. All it allows to reduce, on the one hand, a holding time of one car, on the other hand, to increase the general transmissive capacity of the gas station.

Thus, it is possible to ascertain, that for the gas station three settlement duties are possible: without turn, from the limited long turn, with expectation. As a first approximation recurrence of work can be considered introduction of correcting factors or special dependences.

Thirdly, mnogokanalnost the gas station. Really at first sight the gas station has quantity of Broadcasting Company or serving channels 1. However, taking into account quantity of kinds and grades of the fuel offered at one gas station, it is not difficult to be convinced, that except for one-two grades of the benzine, each Broadcasting Company "specialises" on one grade of fuel and has the retention reservoir. Thus "mnogokanalnost" the gas station is for the majority of them the sums independent single-channel (rarely two-channel) SMO. Such treatment considerably simplifies settlement dependences, however demands "splitting" of an entrance stream of cars on a batch on fuel grades.

Exception are the specialised gas stations, for example, fixed to data ATP. In this case the quantity of grades of fuel contracts to one-two, but Broadcasting Company number increases, i.e. The gas station is a lot of - channel. However the duty of such gas station has specific character, since. The batch of cars, for example, in a bus fleet, can be planned and organised under a drawing within days.

Special research demands the gas station equipped with universal Broadcasting Company when on each column it is positioned and pistols for the basic grades of fuel. In this case the car will be filled on any Broadcasting Company, i.e. The gas station is multichannel, but expenses for building and the maintenance of such multipistol Broadcasting Company will differ from usual Broadcasting Company with one pistol on a column.

Fourthly, the question on the exponential law for time of a batch of the car is debatable. Specified time is defined by two factors: productivity of Broadcasting Company, l/mines, and centre size of a batch of a tank. Obviously, for cargo and cars, buses taking into account specificity of transportations (intracity, long-distance, international) batch time will fluctuate over a wide range. Besides it, there is a close correlation between a grade (kind) of fuel and car type. So, solar oil is used in our country basically for lorries and buses with volumes of tanks considerably surpassing volumes of tanks of cars. All it objectively testifies that batch time as the random variable, will differ from the exponential law. Then two paths of the decision are possible: a correcting of the settlement dependences received on the basis of SMO for puassonovskih of streams; Modelling of real modes of a batch with use of imitating methods.

Fifthly, a choice of economic criteria of an estimation of functioning of the gas station. The economic model of the resulted economic expenses optimised proceeding from a condition of equality of costs from idle times of cars in turn at the gas station and idle times of not loaded columns allows to ascertain the above-stated, that, does not answer market conditions of the competitive environment. As the basic criterion estimations connected with the missed benefit (profit, incomes) that cars refuel at the gas station of competitors should be used. To change a situation, it is necessary to provide such mode of the gas station at which the length of turn on a batch is minimum or is absent. Thus, the criterion should base on comparison of models SMO with the "infinite" and "limited" length of turn, thus the variation in length of turn or a batch waiting time will allow to find an optimum variant of quantity of Broadcasting Company at the gas station.

Other kind of economic criterion - comparison of variants of investment of means in building (reconstruction) of the gas station or, for example, buying of securities, state credit obligations, depositary contributions to banks, etc. As in the near future the oil companies (domestic or joint ventures) or other representatives of private business, for the gas stations first building - advance of the goods on the market will be the basic investors in gas station building; for the second - an effective way of capital investment. Therefore, the economic estimation of the gas station has certain differences for different investors.

On the basis of the materials set forth above in table 1.16 ordering of existing approaches is led to optimum (rational) placement of a network of gasoline stations in region (city). The general for the majority of the analysed researches are following positions.

All methodical workings out base on criterion of a minimum resulted (or full) expenses for building (reconstruction) of the gas station in considered region.

In the majority of approaches as the basic condition the existing network is set and it is a question of updating of this network by change of capacity (reconstruction) of the gas station.

Practically in one of works questions of the organisation and management of deliveries of mineral oil in system «the Tank farm - a gas station network» from the point of view of logistical principles "precisely-in-time" are not considered and

«A minimum of expenses». There are no approaches (principles) of the organisation of work in real time (i.e. Operating control and scheduling) the concrete gas stations and the special rolling stock which is carrying out transportation of fuel on routes «ATP - NB - a gas station network - ATP». Besides it it is not given attention to questions of maintenance of reliability of transportation process and possible paths of increase of non-failure operation of performance of demands for transportations.

There are no methodical workings out under the analytical description of work of the tank farms, considering a casual stream of cars-gasoline tank trucks on loading.

Taking into account a principle "precisely-in-time" economic criteria of maintenance of transportations are not developed for a logistical chain «the Tank farm - a gas station network», and also possible paths of rationalisation of transportation process for the purpose of increase of its efficiency

The stated remarks, concerning a choice of rational placement of a network of gasoline stations in region, it is possible to consider as initial positions for the further research.

Table 1.16

Ordering of methods of optimum (rational) placement of a network of gasoline stations in region the Source Initial data, the description of the approach the Design technique of the Note 1 2 3 4 Technique Gipro - a petrotrance Gos - komnefteproduk - that RSFSR Economic region shares on areas and regions; the gas station network is set Placement of the gas station of region with use of the theory of counts the Simplified model SMO for the gas station; any choice of some factors and restrictions B. Cantor F.M., Jusupov I.J. [62]; Kovalenko

G, Cantor F.M., Habarov

R [65] Comprehensive approach to definition of optimum capacity of the gas station and their placement in region 2 urovnevyj: gas station placement - the decision of a transport problem; optimum capacity of the gas station - method Lagranzha the Considerable quantity of assumptions; conditional examples do not coincide with Danilov E.A.'s fact sheet, etc. [44] There is a network of the tank farms, the existing gas stations, parking of the cars, all distances; the problem of optimum variants of placement Iterative 2 etapnyj algorithm dares: 1 stage - a gas station attachment to NB (on a distance minimum); 2 stage - an attachment of consumers to the gas station Is underlined successful application in a number of regions of Russia; application in the conditions of Bakaev A.A., Olejnik T.G.'s market economy [11] is disputable It is known - how many, what capacity and in what places the gas stations the Decision of the general problem of nonlinear programming with discrete variables are reconstructed or under construction There are no calculation examples; gas station work is not reflected by Habarov A.S. [177] the advanced design procedure of optimum quantity of the gas station Is offered; distances and other parametres of a distributive network the Further development of the approach of Cantor F.M are set. And other authors; a number of empirical dependences is entered, in particular, for time of a batch and length of turn on the gas station It is underlined, that the technique has been used for designing of a network of the gas station of of Volgograd; there are no calculation examples; the prospect of application in the conditions of market economy Sankov V. G [148] the New approach with use of logistical principles is not clear; the gas station number is defined in the presence of the detailed information about transportno - an ecological situation in a city At definition of quantity of the gas station for a basis is taken klasternyj a method of the analysis with use of the theory of counts; modelling of work of the gas station with use eko - nomiko-statistiches - which models Are absent examples of calculation of the statistical parametres necessary for modelling; there is no market competitive environment

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A source: Geiev Mauladi Arbievich. Organizational-economic management methods automobile transportations of mineral oil in a distributive network "the Tank farm - gasoline stations": the Dissertation of a Cand.Econ.Sci.: 08.00.05. - Stavropol,. 2007

More on topic 1.3. The analysis of scientifically-applied workings out in the field of supply by motor transport mineral oil:

  1. chapter 1. The analysis of a condition and the tendency of development of system of supply by mineral oil of motor transport in the conditions of market economy
  2. 3.2. Optimisation of a configuration of a network of gasoline stations on logistical range of distribution of mineral oil for motor transport
  3. 1.2 Condition and prospects of development of system of supply by mineral oil of the developed industrial countries
  4. 1.3. The analysis of theoretical and methodical approaches to the decision of problems of financing of passenger motor transport
  5. 1.2. Foreign experience of financing of the enterprises of motor transport of the general use
  6. 2.1. Essence and features of financing of the enterprises of motor transport of the general use
  7. 1.1. The State of the art and problems of passenger motor transport in Russia
  8. supply with information Development in a control system of quality in motor industry
  9. 2.2. Forms and methods of financing of the enterprises of motor transport of the general use
  10. 2.3. Methodical bases of an estimation of efficiency of financing of the enterprises of motor transport of the general use
  11. 2.3. The Design procedure of characteristics of transportation process of delivery of mineral oil in a network «the Tank farm - the gas station» with principle use "precisely-in-time"
  12. § 2. Insurance of means of motor transport and a civil liability of their owners
  13. Chapter 1. THEORETICAL BASES of FINANCING of the ENTERPRISES of PASSENGER MOTOR TRANSPORT of the GENERAL USE