GraphiCon'2019 Proceedings. Volume 2最新文献

筛选
英文 中文
Mathematical Support and Software of Visual Filtering of Alternatives in Multi-criteria Decision Making Problems 多准则决策问题中备选方案视觉过滤的数学支持与软件
GraphiCon'2019 Proceedings. Volume 2 Pub Date : 2019-11-11 DOI: 10.30987/graphicon-2019-2-82-85
Алёна Захарова, A. Zaharova, Дмитрий Коростелёв, D. Korostelyov, Олег Федонин, O. Fedonin
{"title":"Mathematical Support and Software of Visual Filtering of Alternatives in Multi-criteria Decision Making Problems","authors":"Алёна Захарова, A. Zaharova, Дмитрий Коростелёв, D. Korostelyov, Олег Федонин, O. Fedonin","doi":"10.30987/graphicon-2019-2-82-85","DOIUrl":"https://doi.org/10.30987/graphicon-2019-2-82-85","url":null,"abstract":"The article deals with the problem of multi-criteria decision-making problems, which are characterized by a large number of options and alternatives. It is proposed to use visual filtering of graphic images describing the corresponding alternatives as one of the stages in decision-making in such tasks. The approaches and requirements for the construction of graphic images of alternatives are considered. Describes the steps and algorithms for constructing visual images of alternatives, based on the radial and pie charts, and include the normalization procedure. It describes software that implements the proposed algorithms, as well as providing interactive interaction with an expert for visual filtering of multi-criteria alternatives. Additionally, the capabilities of the developed software are described, which include filtering alternatives based on threshold values, as well as the possibility of conducting a series of experiments in order to obtain the union or intersection of filtered sets of alternatives. A synthetic test for filtering 201 alternatives is described, each of which is described by 15 criteria. As a result of a series of experiments, this choice set was reduced by about 28 times. A description is also given of an experiment on visual filtering of real alternatives that describe estimates of the accuracy of calculating inviscid flow around a cone using several OpenFoam solvers. Each solver is characterized by 288 criteria, and according to the results of visual filtering, the advantage in the accuracy of the calculations of two solvers over the others is clearly established.","PeriodicalId":409819,"journal":{"name":"GraphiCon'2019 Proceedings. Volume 2","volume":"231 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134097418","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}
引用次数: 0
Comparative Assessment of the NPP Risk (on the Example of Rostov and Kalinin NPP). Development of Risk Indicators Atlas for Russian NPPs 核电站风险比较评估(以罗斯托夫和加里宁核电站为例)。俄罗斯核电站风险指标图集的编制
GraphiCon'2019 Proceedings. Volume 2 Pub Date : 2019-11-11 DOI: 10.30987/graphicon-2019-2-290-294
Кирилл Чернявский, K. Chernyavskii, Мария Берберова, Mariya Berberova
{"title":"Comparative Assessment of the NPP Risk (on the Example of Rostov and Kalinin NPP). Development of Risk Indicators Atlas for Russian NPPs","authors":"Кирилл Чернявский, K. Chernyavskii, Мария Берберова, Mariya Berberova","doi":"10.30987/graphicon-2019-2-290-294","DOIUrl":"https://doi.org/10.30987/graphicon-2019-2-290-294","url":null,"abstract":"The object of the work is to compare and analyze external and internal exposure doses and assess damage to the population living around nuclear power plants with VVER-type reactors (on the Rostov and Kalinin nuclear power plants), within a certain radius, taking into account the wind rose. There will also be proposed measures for the possible addition and refinement of formulas. The method of calculating the doses of external and internal exposure, as well as damage to the population in the ring segment of rumba. External and internal exposure doses for Kalinin and Rostov NPPs have been considered. An assessment of material damage was conducted. A variant of the format of the atlas of risk assessments is proposed. Initial assumptions have been made regarding the discrepancy in the results obtained for both doses and damage. One of the possible reasons for the discrepancy in the results of calculating the dose and damage to the Kursk and Smolensk NPPs may be the difference in the terrain. We need to take this into account. By relief changes we mean not ravines and slopes, but hills, mountains, fields. Additionally, you can consider the type of terrain: steppes, forests, etc., although all this will contribute to the already quite a long distance from the nuclear power plant. In the future, it is planned to continue work on the atlas of risk assessments and think over its more convenient format.","PeriodicalId":409819,"journal":{"name":"GraphiCon'2019 Proceedings. Volume 2","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115267233","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}
引用次数: 0
Visualization of Transition's Scenarios from Harmonic to Chaotic Flexible Nonlinear-elastic Nano Beam's Oscillations 柔性非线性弹性纳米梁振荡从谐波到混沌过渡场景的可视化
GraphiCon'2019 Proceedings. Volume 2 Pub Date : 2019-11-11 DOI: 10.30987/graphicon-2019-2-62-65
Вадим Крысько, V. Krysko, Ирина Папкова, I. Papkova, Екатерина Крылова, E. Krylova, Антон Крысько, A. Krysko
{"title":"Visualization of Transition's Scenarios from Harmonic to Chaotic Flexible Nonlinear-elastic Nano Beam's Oscillations","authors":"Вадим Крысько, V. Krysko, Ирина Папкова, I. Papkova, Екатерина Крылова, E. Krylova, Антон Крысько, A. Krysko","doi":"10.30987/graphicon-2019-2-62-65","DOIUrl":"https://doi.org/10.30987/graphicon-2019-2-62-65","url":null,"abstract":"In this study, a mathematical model of the nonlinear vibrations of a nano-beam under the action of a sign-variable load and an additive white noise was constructed and visualized. The beam is heterogeneous, isotropic, elastic. The physical nonlinearity of the nano-beam was taken into account. The dependence of stress intensity on deformations intensity for aluminum was taken into account. Geometric non-linearity according to Theodore von Karman’s theory was applied. The equations of motion, the boundary and initial conditions of the Hamilton-Ostrogradski principle with regard to the modified couple stress theory were obtained. The system of nonlinear partial differential equations to the Cauchy problem by the method of finite differences was reduced. The Cauchy problem by the finite-difference method in the time coordinate was solved. The Birger variable method was used. Data visualization is carried out from the standpoint of the qualitative theory of differential equations and nonlinear dynamics were carried out. Using a wide range of tools visualization allowed to established that the transition from ordered vibrations to chaos is carried out according to the scenario of Ruelle-Takens-Newhouse. With an increase of the size-dependent parameter, the zone of steady and regular vibrations increases. The transition from regular to chaotic vibrations is accompanied by a tough dynamic loss of stability. The proposed method is universal and can be extended to solve a wide class of various problems of mechanics of shells.","PeriodicalId":409819,"journal":{"name":"GraphiCon'2019 Proceedings. Volume 2","volume":"67 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123524093","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}
引用次数: 1
Visualization of Contact Interaction of Nanobeams 纳米梁接触相互作用的可视化
GraphiCon'2019 Proceedings. Volume 2 Pub Date : 2019-11-11 DOI: 10.30987/graphicon-2019-2-92-94
Максим Жигалов, M. Zhigalov, Виктор Апрыскин, V. Apryskin, Вадим Крысько, V. Krysko
{"title":"Visualization of Contact Interaction of Nanobeams","authors":"Максим Жигалов, M. Zhigalov, Виктор Апрыскин, V. Apryskin, Вадим Крысько, V. Krysko","doi":"10.30987/graphicon-2019-2-92-94","DOIUrl":"https://doi.org/10.30987/graphicon-2019-2-92-94","url":null,"abstract":"The paper presents a visualization of the contact interaction of two Bernoulli-Euler nanobeams connected through boundary conditions. Mathematical models of beams are based on the gradient deformation theory and the theory of contact interaction of B. Y. Cantor. The visualization is based on Fourier transform and wavelet transform, phase portrait.","PeriodicalId":409819,"journal":{"name":"GraphiCon'2019 Proceedings. Volume 2","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127361849","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}
引用次数: 0
Visualization of Scenarios for the Transition of Oscillations from Harmonic to Chaotic for a Micropolar Kirchhoff-Love Cylindrical Meshed Panel 微极Kirchhoff-Love柱面网格板从谐波到混沌振荡的可视化
GraphiCon'2019 Proceedings. Volume 2 Pub Date : 2019-11-11 DOI: 10.30987/graphicon-2019-2-66-70
Е. Ю. Крылова, E. Krylova, И. В. Папкова, I. Papkova, О. А. Салтыкова, O. Saltykova, В. А. Крысько, V. Krysko
{"title":"Visualization of Scenarios for the Transition of Oscillations from Harmonic to Chaotic for a Micropolar Kirchhoff-Love Cylindrical Meshed Panel","authors":"Е. Ю. Крылова, E. Krylova, И. В. Папкова, I. Papkova, О. А. Салтыкова, O. Saltykova, В. А. Крысько, V. Krysko","doi":"10.30987/graphicon-2019-2-66-70","DOIUrl":"https://doi.org/10.30987/graphicon-2019-2-66-70","url":null,"abstract":"On the basis of the kinematic hypotheses of the Kirchhoff-Love built a mathematical model of micropolar cylindrical meshed panels vibrations under the action of a normal distributed load. In order to take into account the size-dependent behavior, the panel material is considered as a Cosser’s pseudocontinuum with constrained particle rotation. The mesh structure is taken into account by the phenomenological continuum model of G. I. Pshenichnov. For a cylindrical panel consisting of two systems of mutually perpendicular edges, a scenario of transition of oscillations from harmonic to chaotic is constructed. It is shown that in the study of the behavior of cylindrical micropolar meshed panels it is necessary to study the nature of the oscillations of longitudinal waves.","PeriodicalId":409819,"journal":{"name":"GraphiCon'2019 Proceedings. Volume 2","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127178955","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}
引用次数: 1
Selection of Satellite Image Series for the Determination of Forest Pathology Dynamics Taking Into Account Cloud Coverage and Image Distortions Based on the Data Obtained from the Key Point Detector 基于关键点探测器数据的考虑云层覆盖和图像畸变的森林病理动态的卫星图像序列选择
GraphiCon'2019 Proceedings. Volume 2 Pub Date : 2019-11-11 DOI: 10.30987/graphicon-2019-2-159-163
Евгений Трубаков, E. Trubakov, Андрей Трубаков, A. Trubakov, Дмитрий Коростелёв, D. Korostelyov, Дмитрий Титарев, Dmitriy Titarev
{"title":"Selection of Satellite Image Series for the Determination of Forest Pathology Dynamics Taking Into Account Cloud Coverage and Image Distortions Based on the Data Obtained from the Key Point Detector","authors":"Евгений Трубаков, E. Trubakov, Андрей Трубаков, A. Trubakov, Дмитрий Коростелёв, D. Korostelyov, Дмитрий Титарев, Dmitriy Titarev","doi":"10.30987/graphicon-2019-2-159-163","DOIUrl":"https://doi.org/10.30987/graphicon-2019-2-159-163","url":null,"abstract":"Remote sensing of the earth and monitoring of various phenomena have been and still remain an important task for solving various problems. One of them is the forest pathology dynamics determining. Assuming its dependence on various factors forest pathology can be either short-term or long-term. Sometimes it is necessary to analyze satellite images within a period of several years in order to determine the dynamics of forest pathology. So it is connected with some special aspects and makes such analysis in manual mode impossible. At the same time automated methods face the problem of identifying a series of suitable images even though they are not covered by clouds, shadows, turbulence and other distortions. Classical methods of nebulosity determination based either on neural network or decision functions do not always give an acceptable result, because the cloud coverage by itself can be either of cirrus intortus type or insignificant within the image, but in case of cloudiness it can be the reason for wrong analysis of the area under examination. The article proposes a new approach for the analysis and selection of images based on key point detectors connected neither with cloudiness determination nor distorted area identification, but with the extraction of suitable images eliminating those that by their characteristics are unfit for forest pathology determination. Experiments have shown that the accuracy of this approach is higher than of currently used method in GIS, which is based on cloud detector.","PeriodicalId":409819,"journal":{"name":"GraphiCon'2019 Proceedings. Volume 2","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125721170","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}
引用次数: 3
Optimization of Illumination through Windows for MCRT MCRT的窗口照明优化
GraphiCon'2019 Proceedings. Volume 2 Pub Date : 2019-11-11 DOI: 10.30987/graphicon-2019-2-32-36
Ильдар Валиев, I. Valiev, Дмитрий Жданов, D. Zhdanov, Сергей Ершов, S. Ershov, Алексей Волобой, A. Voloboy, Вадим Соколов, V. Sokolov, Владимир Галактионов, V. Galaktionov
{"title":"Optimization of Illumination through Windows for MCRT","authors":"Ильдар Валиев, I. Valiev, Дмитрий Жданов, D. Zhdanov, Сергей Ершов, S. Ershov, Алексей Волобой, A. Voloboy, Вадим Соколов, V. Sokolov, Владимир Галактионов, V. Galaktionov","doi":"10.30987/graphicon-2019-2-32-36","DOIUrl":"https://doi.org/10.30987/graphicon-2019-2-32-36","url":null,"abstract":"The paper presents an improvement of Monte-Carlo ray tracing which changes ray emission from a light source to accelerate convergence i.e. reduce the noise remained after the given run time. It is mainly intended for interior scenes illuminated from outside (e.g. skylight) through windows or other holes. The rays from light sources are generated so that they are directed to these windows. In other words, the number of rays is increased for directions that contribute to the camera image. It is shown that the proposed method allows calculating image with desirable quality several times faster.","PeriodicalId":409819,"journal":{"name":"GraphiCon'2019 Proceedings. Volume 2","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131354048","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}
引用次数: 0
Generalization of Experimental Information and Identification of Patterns in the Behavior of Metals and Alloys under Fatigue Loading Based on the Mapping of Fatigue Curves into Reduced Spaces 基于疲劳曲线映射到化简空间的疲劳载荷下金属和合金行为模式的实验信息概括与识别
GraphiCon'2019 Proceedings. Volume 2 Pub Date : 2019-11-11 DOI: 10.30987/graphicon-2019-2-256-260
Вячеслав Андреев, V. Andreev, Ольга Вячеславовна Андреева, O. Andreeva
{"title":"Generalization of Experimental Information and Identification of Patterns in the Behavior of Metals and Alloys under Fatigue Loading Based on the Mapping of Fatigue Curves into Reduced Spaces","authors":"Вячеслав Андреев, V. Andreev, Ольга Вячеславовна Андреева, O. Andreeva","doi":"10.30987/graphicon-2019-2-256-260","DOIUrl":"https://doi.org/10.30987/graphicon-2019-2-256-260","url":null,"abstract":"The paper presents a characteristic of a fairly large sample of data on the fatigue of metals and alloys, including the coordinates of the fatigue limit and a description of the conditions under which these results were obtained. Using the reduction procedure allows us to obtain a generalized dependence of the reduced parameters of fatigue resistance, on the basis of which it is possible to develop forecasting methods. Extension of the reduction procedure to limited endurance limits allows one to obtain a generalized surface of the presented indicators of fatigue resistance and to increase the reliability of the forecasts made of indicators of fatigue resistance.","PeriodicalId":409819,"journal":{"name":"GraphiCon'2019 Proceedings. Volume 2","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134316411","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}
引用次数: 0
Software Platform for Designing and Running Artificial Intelligence Competitions with a Visualization Subsystem 基于可视化子系统的人工智能竞赛设计与运行软件平台
GraphiCon'2019 Proceedings. Volume 2 Pub Date : 2019-11-11 DOI: 10.30987/graphicon-2019-2-295-299
Дмитрий Коростелев, D. A. Korostelev, Алексей Радченко, A. Radchenko, Никита Сильченко, N. Silchenko, Ростислав Крылов, Rostislav Krylov, Павел Мигаль, Pavel Migal
{"title":"Software Platform for Designing and Running Artificial Intelligence Competitions with a Visualization Subsystem","authors":"Дмитрий Коростелев, D. A. Korostelev, Алексей Радченко, A. Radchenko, Никита Сильченко, N. Silchenko, Ростислав Крылов, Rostislav Krylov, Павел Мигаль, Pavel Migal","doi":"10.30987/graphicon-2019-2-295-299","DOIUrl":"https://doi.org/10.30987/graphicon-2019-2-295-299","url":null,"abstract":"The paper describes the solution to the problem of testing the efficiency of new ideas and algorithms for intelligent systems. Simulation of interaction of the corresponding intelligent agents in a competitive form implementing different algorithms is proposed to use as the main approach to the solution. To support this simulation, a specialized software platform is used. The paper describes the platform developed for running competitions in artificial intelligence and its subsystems: a server, a client and visualization. Operational testing of the developed system is also described which helps to evaluate the efficiency of various algorithms of artificial intelligence in relation to the simulation like \"Naval Battle\".","PeriodicalId":409819,"journal":{"name":"GraphiCon'2019 Proceedings. Volume 2","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133981210","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}
引用次数: 1
Modelling of Flexible Elements 柔性构件建模
GraphiCon'2019 Proceedings. Volume 2 Pub Date : 2019-11-11 DOI: 10.30987/graphicon-2019-2-219-221
Елена Афонина, E. Afonina, Марина Николаевна Левая, M. N. Levaya, Игорь Сергеевич Левый, I. S. Levyy
{"title":"Modelling of Flexible Elements","authors":"Елена Афонина, E. Afonina, Марина Николаевна Левая, M. N. Levaya, Игорь Сергеевич Левый, I. S. Levyy","doi":"10.30987/graphicon-2019-2-219-221","DOIUrl":"https://doi.org/10.30987/graphicon-2019-2-219-221","url":null,"abstract":"Flexible elements are used for modeling of various hawsers, chains, ropes, tail-ropes and other elements in the programmes of simulation. Depending on a current task a set of requirements necessary for a flexible element modeling is formulated. The article presents two methods of rope, wire, cable designing in computer games programming environment Unity3D based on the use of primitive objects. The standard design method grounded in hinge joints employment is considered. The disadvantages of a standard method are noted and two new methods of modeling are offered. The developed methods consider the requirements necessary for the solution of the task at hand, they include the reality of a scene, the interaction with surrounding objects, the possibility to specify the function of a natural sag. Two methods of modeling are compared taking into account the implementation area of programs, the reflection of physical and geometrical properties of modelled entity and the reality of a scene. Both methods meet specified requirements, however it is expedient to use one of the methods for mobile scenes, such as games, exercise machines, simulators of processes, while the other fits better for static programmes.","PeriodicalId":409819,"journal":{"name":"GraphiCon'2019 Proceedings. Volume 2","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129878063","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}
引用次数: 0
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信