Proceedings Third Russian-Korean International Symposium on Science and Technology. KORUS'99 (Cat. No.99EX362)最新文献

{"title":"The calculation of energy dissipation in fasteming zone of the landing gear strut at dynamic analysis of aircraft landing","authors":"R.E. Lamper, En. Mazutskaj","doi":"10.1109/KORUS.1999.875860","DOIUrl":"https://doi.org/10.1109/KORUS.1999.875860","url":null,"abstract":"At definition of loads, acting on the airframe and the landing gear strut at landing, the important role plays the damping of oscillations, as in computational cases the determining peaks of loads may are not first, but second or third. As an example, on fig. 1 the computational dependence of the force Py by the time t, acting on the plane frome the main landing gear version of the aircraft Tu-204 in one of landings, is presented. At definition of repeatability of loads and resource in computation some peaks of loads, arising at airframe oscillations are taken. In accepted estimations of damping, the real description of the landing gear shock absorption work [ 11, aerodynamic and constructional damping of the airframe are taken into account. The reckoning of aerodynamic damping in accordance with linear theory of a wing and use of the stationary flow around hypothesis can be found, for exzample, in work [2]. Usually, the logarithmic decrement of oscillations, describing damping property of a plane construction and energy emanation in immobile air environment define at frequent tests in following assumptions: the researched tone of oscillations is well allocated; the damping force are possible approximate by forces of viscous fristion; the damping is sufficiently small. At such assumptions the decrement of oscillations takes by constant size for given tone of oscillations. In present paper the contribution in damping at landing of the energy dissipation in the landing gear fasteming places, in that zone of a wing (or fuselage), in which concentrated forces from the landing gear are distributed on power elements of a composition, is discussed. This kind of damping is away in the flight and cannot be investigated in frequent tests. The model of the indicated kind of damping, taking into account , that it damping is essential at rough landings, when loads on planer are close to maximum operational loads, is propounded. Airframe is represented by system of beams, corresponding to a wing, fuselage and tail unit. However, in zone not far from the fastening of the landing gear the distribution in construction elements the force factors, dependent from the force in the landing gear shock-absorber, differs from srain disrtibution in beam. With regard to plane beams such zones are possible to consider as zones of local deformation, with sizes in several building heights of a beam. For description of the behaviour of some number of constructional elements in zones of local deformation we shall take the following model (fig. 2). Before of determinate strain level the element is deformed as elastic, and higher of this level in element the sliding platform, on which force of dry friction works is arisen. The model of such kind is a special case of Voigt model [3]. For simplification of model we shall assume, that stiffness 2 is small in comparison with stiffness 1. Then the beginning of sliding does not practically change the common stiffness of E element and t","PeriodicalId":250552,"journal":{"name":"Proceedings Third Russian-Korean International Symposium on Science and Technology. KORUS'99 (Cat. No.99EX362)","volume":"509 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134357105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A study on the fatigue crack growth behavior for the fuselage pressure bulkhead","authors":"J. Kwon, K. Hwang","doi":"10.1109/KORUS.1999.875859","DOIUrl":"https://doi.org/10.1109/KORUS.1999.875859","url":null,"abstract":"","PeriodicalId":250552,"journal":{"name":"Proceedings Third Russian-Korean International Symposium on Science and Technology. KORUS'99 (Cat. No.99EX362)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115588274","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Using neural nets for time series forecasting","authors":"G.F. Filaretov, E.O. Averchenkov","doi":"10.1109/KORUS.1999.875917","DOIUrl":"https://doi.org/10.1109/KORUS.1999.875917","url":null,"abstract":"The purpose of the work is a comparison of statistical and neural network approaches of time series models of autoregressive moving average type construction. The basic method of research is simulation. On the basis of the results analysis, recommendations for network topology choice for neural modeling of autoregressive (AR), moving average (MA) and mixed (ARMA) processes of the various orders p, q are produced.","PeriodicalId":250552,"journal":{"name":"Proceedings Third Russian-Korean International Symposium on Science and Technology. KORUS'99 (Cat. No.99EX362)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116734898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Method for obtaining of tritium labelled compounds","authors":"I. V. Romannikova, Y. Kit, V. A. Richter, V. Sidorov","doi":"10.1109/KORUS.1999.876245","DOIUrl":"https://doi.org/10.1109/KORUS.1999.876245","url":null,"abstract":"Introduction Radioactivity -Jbellec compounds are often used in different studies molecular biology, ecology, pharmacology, toxicology, etc. Only two,radioactive isotopes (3H and 14C) is adaptable to labelling of practically all organic compounds. Using of 3H is favoured because it have greater theoretical specific activity in comparison with 14C. But only limited numbers of tritium labelled compounds are commercially available. Development of universal method for preparation of any organic compounds was the main objective of this investigation.","PeriodicalId":250552,"journal":{"name":"Proceedings Third Russian-Korean International Symposium on Science and Technology. KORUS'99 (Cat. No.99EX362)","volume":"271 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115852342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Curvature of line in the theories of flat bending","authors":"A.V. Anfilofiew","doi":"10.1109/KORUS.1999.875950","DOIUrl":"https://doi.org/10.1109/KORUS.1999.875950","url":null,"abstract":"The author estimates simplifications in the tasks of definition of lines with a small flexure in the theory of bending. Relations are established between the simplified and exact definitions of the curvature of lines. The approached expression is considered as result of association of the exact expression with a simplifying functional multiplier.","PeriodicalId":250552,"journal":{"name":"Proceedings Third Russian-Korean International Symposium on Science and Technology. KORUS'99 (Cat. No.99EX362)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115525015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prospects of town-planning development of northern territories of western Siberia","authors":"O.V. Stakheev","doi":"10.1109/KORUS.1999.875886","DOIUrl":"https://doi.org/10.1109/KORUS.1999.875886","url":null,"abstract":"The construction of rational system of moving of northern territories of Western Siberia, is one of major tasks of a regional lay-out, where it is required to plan ways of development of the existing occupied places in borders of all territory, to define(determine) their interaction and interrelations, and thus to keep urban-ecological balance of all system as a whole. The climatice of northern regions of Western Siberia are complex and are various. These characteristics are expressed in significant severity of a climate low air temperature (especially in winter), speed and direction of winds, humidity, lack of solar radiation and presence eternal frost (in the most northern areas of region). As the principal criterion of development of region was the industrial system based on resources extractive industry, on the initial stage of sistem formation of moving ZSNGK was offered (Glavtumenneftegas) a branch method of development of region. Its principle is each deposit has the settlement. Now practice has shown an inefficiency of such variant, as the departmental approach was planned to gen the enormous grants about some hundreds billions roubles for creation of a network of fine constant urban formations located not far from a deposit. The giving to some settlements of the \"city\" status only on one typical sing ((populous)), has resulted that there is a decentralization of moving, and it entails duplication of functions, dispersion of financial recources and uncertainty of the further development of these settlements after completion of deposits exploitation. It is possible to add, that the system of settlements is characterized by a low level of service organization, irrational using of territories, rising the price of construction and limited opportunities of functions transformation. In in many small settlements it is impossible to create comfortable inhabited place simultaneously, thavs why the cities are not stabilized and during many years keep function Itof building cities\". As a result of the branch approach, whole system loses its socio economic potential, it is expressed in inefficient structure of moving, backwardness of transport and communication, weak social potential of cities, and, as the consequence, high social intensity in region is kept. The given approach is a brake in creation of industrial and social infrastructures. Besides the offered branch development of region by a number of leading research organizations (LenNNIPcityconstruction, HYPROGOR) alternative variant of town-planning developing of all regional system of moving was developed, which considered in unity development of two directions of economic settling of region industrial and civil. It would provide economic operation of resources and creation of settlements, which are comfortable for residing the workers. The base of this variant is a principle of the organizational centralized system of moving, which has steadly town-planning receptions. The main idea is the c","PeriodicalId":250552,"journal":{"name":"Proceedings Third Russian-Korean International Symposium on Science and Technology. KORUS'99 (Cat. No.99EX362)","volume":"114 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123124055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A hybrid genetic approach for single machine scheduling with distinct due dates and release times","authors":"Jae-Gyun Kim","doi":"10.1109/KORUS.1999.875916","DOIUrl":"https://doi.org/10.1109/KORUS.1999.875916","url":null,"abstract":"The article addresses the n-job, non-preemptive and single machine scheduling problem of minimizing the sum of earliness and tardiness with different release times and due dates. To solve the problem, it proposes a hybrid genetic algorithm with a new crossover and mutation operators to adjust the job sequencing. To investigate the suitability of the parameters set and the quality of the solution, the article evaluates the number of corresponding solutions and the speed of converging to an optimal solution which is solved by an enumeration method for small size problems. To demonstrate the performance of the proposed GA, it is empirically evaluated by solving a large number of problems and compared with solutions obtained by genetic algorithms using the existing operators.","PeriodicalId":250552,"journal":{"name":"Proceedings Third Russian-Korean International Symposium on Science and Technology. KORUS'99 (Cat. No.99EX362)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123581613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Flow of liquids through ring-type slots at high pressures","authors":"V. S. Belousov","doi":"10.1109/KORUS.1999.875866","DOIUrl":"https://doi.org/10.1109/KORUS.1999.875866","url":null,"abstract":"The purpose of the present activity is definition of rate of flow through a narrow ring-type slot at a difference of pressure up to 1 GPa. Such a flow of a liquid takes place, for example, in a radial space of a system, the cylinder piston-barrel used in different hydraulic units of high-pressure. A feature of the problem is the change of geometry of a gap and physical characteristics of a liquid (density and viscosity) at high pressures and temperatures (the liquid in a gap is heated at the expense of viscid friction).","PeriodicalId":250552,"journal":{"name":"Proceedings Third Russian-Korean International Symposium on Science and Technology. KORUS'99 (Cat. No.99EX362)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114950547","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on resistance of iodine-intercalated fullerene films","authors":"A. Berdinsky, Y. Shevtsov, A. V. Okotrub, Jing-Hyuk Lee, V. Gridchin, L. T. Chadderton, Y. Yanovsky","doi":"10.1109/KORUS.1999.876254","DOIUrl":"https://doi.org/10.1109/KORUS.1999.876254","url":null,"abstract":"A study on resistance of iodine-intercalated fullerene film has been done. Research on electro-physical properties of new materials is an important scientific and applied problem. In this work we show the technology of producing iodine-intercalated fullerene films, the construction of a resistor with iodine-intercalated C/sub 60/ fullerene film as conductive media and the results of measured resistance.","PeriodicalId":250552,"journal":{"name":"Proceedings Third Russian-Korean International Symposium on Science and Technology. KORUS'99 (Cat. No.99EX362)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123971859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Problems of materials science","authors":"L.I. Tushinsky","doi":"10.1109/KORUS.1999.875944","DOIUrl":"https://doi.org/10.1109/KORUS.1999.875944","url":null,"abstract":"New knowledge of fundamental science about the reality of materials structure, fractality of naturally occurring objects, wholeness of various natural and social phenomena, sinergetics and self-organization in complex systems during their evolution, single block structure of material world, information and society allow one to significantly change many principal approaches to the problem of creating new materials and improving the quality of traditional ones.","PeriodicalId":250552,"journal":{"name":"Proceedings Third Russian-Korean International Symposium on Science and Technology. KORUS'99 (Cat. No.99EX362)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130569564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}