Proceedings of the 2019 International Conference on Modeling, Analysis, Simulation Technologies and Applications (MASTA 2019)最新文献

{"title":"Research and Application of Graduate Satisfaction Based on SEM -- Take USTB as An Example","authors":"Tianxin Zong, Na Li, Zhigang Zhang","doi":"10.2991/MASTA-19.2019.22","DOIUrl":"https://doi.org/10.2991/MASTA-19.2019.22","url":null,"abstract":"Based on the structural equation model and the characteristics of University Of Science and Technology Beijing(USTB), a graduate satisfaction evaluation model is constructed by using PLS estimation algorithm, and the fitting degree of the model is tested. It is found that the perceived quality has a great influence on the graduate satisfaction. It has a certain reference value for the improvement of school teaching and the application of structural equation model in the field of teaching. Introduction Structural equation model, also known as latent variable model, is the combination of factor analysis and path analysis [1]. It is an important statistical method for quantitative research in contemporary behavioral and social fields. It is an commonly used statistical modeling technology, which can introduce the latent variables to study the causal link between observed variables and find out the main factors which affecting teaching evaluation. Chin [2] believes that the choice of two modeling methods depends mainly on the research purpose; Joreskog & Word [3] believes that when the purpose of the research is theoretical test and the theoretical knowledge is sufficient, LISREL should be used. From a theoretical point of view, China's college satisfaction model is mainly based on foreign models, and there is no mature and official framework. So the graduate satisfaction index model constructed in this paper is not yet mature, and the relationship between variables in the model needs to be verified in empirical research. Therefore, based on the above analysis, this paper should adopt PLS modeling technology. Empirical Research on Graduate Satisfaction Model Graduate Satisfaction Assessment Model Framework Setting In order to understand the satisfaction of the USTB undergraduate students, from the perspective of students to find out the problems that the school may have in related work, the Academic Affairs Office conducted a questionnaire survey on the USTB 2018 Senior. This article constructed its index system according to the items involved in the questionnaire. The survey in this study used the 5-point Likert scale. The higher the score, the higher the satisfaction. The scale including 3 main indicators: Teaching perception, Service perception and Student satisfaction. Reliability and Validity Analysis In May 2018, the Academic Affairs Office conducted a questionnaire survey of USTB 2018 seniors, distributed 3,249 questionnaires and collected 2,841 questionnaires. After the deletion of outliers and missing values, the total number of valid questionnaires was 2,650. The effective recovery rate of the questionnaire was 81.6%. International Conference on Modeling, Analysis, Simulation Technologies and Applications (MASTA 2019) Copyright © 2019, the Authors. Published by Atlantis Press. This is an open access article under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/). Advances in Intelligent Systems Research, volume 168","PeriodicalId":103896,"journal":{"name":"Proceedings of the 2019 International Conference on Modeling, Analysis, Simulation Technologies and Applications (MASTA 2019)","volume":"187 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121612096","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":"Research on Quantum Computing Technology and Application","authors":"Mengliang Li, Hong Yang, Xiong Guo","doi":"10.2991/MASTA-19.2019.30","DOIUrl":"https://doi.org/10.2991/MASTA-19.2019.30","url":null,"abstract":"Quantum computing is a novelty type of calculation mode that follows the rules of quantum mechanics regulating quantum information units. The general theoretical model of a quantum computer is a universal Turing machine that is reinterpreted by using the laws of quantum mechanics. Quantum computing can greatly improve the computational efficiency through the principle of quantum superposition, which is widely used in artificial intelligence (AI), accurate weather forecast, traffic congestion management and other fields. In the past 10 years, quantum computing has been increasing in technology, the number of products and the scale of industry. This paper will introduce the history, concepts, current research status, main technology and applications of quantum computing, and the development trends of quantum computing will be presented. Introduction For most of computing history, the foundational hardware technology has been binary digital transistor logic. In such digital systems, data and programs are encoded into binary digits (bits) based on two states: on and off. The field of quantum computing introduces a whole new approach to the underlying computing hardware by shifting from simple binary (two-state) logic to a more powerful multi-state logic using a new notion of bit, known as “quantum bits” or “qubits” which are represented by quantum as superposition and entanglement[1]. This shift from a binary digital representation found in today’s conventional computers to a quantum digital representation in tomorrow’s computers will bring huge increases in computing power and new, innovative software that handles today’s hugely complex distributed computational problems and provides more powerful analysis of today’s complex data patterns [2]. Quantum computing holds the potential to revolutionize fields from chemistry and logistics to finance and physics. However, the increase in power and capability that quantum computing will provide, will also be seen as a dire threat because it can easily defeat today’s encryption mechanisms, which have all been built using pre-quantum computing approaches. As strong as today’s encryption mechanisms have been, they wouldn’t stand a chance against a quantum computing-based attack. This widely known risk associated with the power of quantum computing is very concerning for governments, institutions and individuals whose encrypted files are safe today, but may not be in 10-20 years when quantum computing takes off [8]. This paper will provide the history of quantum computing and its concepts. it will summarize the current research status, main technology and applications of quantum computing, as well as summarize the development trend associated with quantum computing. Basic Concepts of Quantum Computing Definition Quantum computing is a fresh type of calculation mode that follows the rules of quantum mechanics regulating quantum information units. Quantum computing is a kind of parallel computing, which takes ent","PeriodicalId":103896,"journal":{"name":"Proceedings of the 2019 International Conference on Modeling, Analysis, Simulation Technologies and Applications (MASTA 2019)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126272993","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":"Design of Automated Warehouse Based on Computer Simulation","authors":"Shi-ya Qiu, Sichun Zhang","doi":"10.2991/MASTA-19.2019.28","DOIUrl":"https://doi.org/10.2991/MASTA-19.2019.28","url":null,"abstract":"As/RS (Automated Storage and Retrieval System) is an important part of modern logistics System, which is widely used in various industries. At present, it has become one of the signs of enterprise production and management informatization. In this paper, the method of software simulation aided design is used to carry out the planning and design of finished tile warehouse in brick and tile factory. And through the simulation animation to see the warehouse each transportation, storage equipment and trailer, stacker and so on state, the simulation system will reflect the blocking and bottleneck position and situation in the system, the computer simulation results provide a direct reference and basis for the scheme optimization and improve the quality of the design. Introduction Automated Storage and retrieval is a kind of storage and retrieval system with the aid of mechanical facilities and computer management and control systems (including control systems and upper management systems) such as high-rise shelves, lane stackers, automatic sorting systems, automatic loading and unloading systems, peripheral facilities and equipment, etc. [1-3]. The automated storage and retrieval system consists of three-dimensional high-rise shelves, lane stacker Crane, storage and retrieval system, storage management control system and civil engineering and auxiliary facilities part composition. The design content includes the process of loading and unloading, the management of loading and unloading, the interface of loading and unloading, the application of conveying equipment (stacker, trailer) , the route of conveying system, and the design of storage space. [4-6] the planning and design of three-dimensional warehouse of finished tiles in brick and tile factory was carried out by using the method of software simulation aided design. Finally, a warehouse model with similar warehouse management strategy is established and its reliability and stability are verified by simulating the operation of the system Problem Description Business Background A brick and tile enterprise mainly produces hollow brick, standard brick, perforated brick, tile and other products, the factory purchased a new land plan for the construction of a warehouse inventory of more than 5500 items. The newly purchased land of the brick and tile factory covers an area of 3000 square meters and is of \"L\" type. Primitive Conditions 1Year working time: 251 Days; 2Working Hours: 3 Shifts, 24 hours a day 3The storage area of the warehouse has a net height of 20 meters, a net width of 55 meters and a net length of 22 meters 4finished brick size and quality: Each finished brick length of 24 cm, 5.3 cm wide, 11.5 cm high, the quality of each 2.5 kg. 5finished bricks and tiles cargo stacking specifications for 144 finished bricks and tiles per pallet, pallet and the total quality of goods is about 370kg. International Conference on Modeling, Analysis, Simulation Technologies and Applications (MASTA 2019) Co","PeriodicalId":103896,"journal":{"name":"Proceedings of the 2019 International Conference on Modeling, Analysis, Simulation Technologies and Applications (MASTA 2019)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127102265","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 Novel Pulse Sensor for Weak Fields of Transient Electromagnetic Pulse","authors":"Xue-he Dong, D. Meng","doi":"10.2991/MASTA-19.2019.31","DOIUrl":"https://doi.org/10.2991/MASTA-19.2019.31","url":null,"abstract":"","PeriodicalId":103896,"journal":{"name":"Proceedings of the 2019 International Conference on Modeling, Analysis, Simulation Technologies and Applications (MASTA 2019)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130852580","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":"Design and Implementation of Digital Filter for PMR","authors":"Xiaohai Tian, Xiao-lei Zhao, Dong Zhang, Rui Gao","doi":"10.2991/MASTA-19.2019.21","DOIUrl":"https://doi.org/10.2991/MASTA-19.2019.21","url":null,"abstract":"","PeriodicalId":103896,"journal":{"name":"Proceedings of the 2019 International Conference on Modeling, Analysis, Simulation Technologies and Applications (MASTA 2019)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132714208","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":"Numerical Simulation Research on the Stress Response of the Bent Rockbolt with the Shear Displacement of Rock Mass","authors":"Zehua Guo, Bin Wang, Y. Ning, Shiying Liang","doi":"10.2991/MASTA-19.2019.50","DOIUrl":"https://doi.org/10.2991/MASTA-19.2019.50","url":null,"abstract":"More and more attentions have been paid to the problem of the shear failure in the conventional straight rockbolt support for underground excavations. Different bolting innovations have been tried over the years. The bent rockbolt with promise is a new mean of rock support. Through numerical simulation software, the shear characteristics of the bent rockbolt is analyzed. Three-dimensional numerical models of the bent rockbolt and the straight rockbolt are established. both of which are subjected to a shear displacement of rock mass. Their stress and deformation characteristics results show that stress concentration easily occurs at the intersection point of anchored portion and non-anchored portion along the bolt. In the case of the mises equivalent stress, the bent rockbolt has a smaller one than the straight rockbolt under the same shear displacement of rock mass. So the bent rockbolt is not easy to be damaged and can better adapte to the shear damage of rock mass. Introduction It is widely accepted that joints in rock mass can affect the safety and stability of underground excavations including mining, tunneling, and other type of engineered caverns[1]. The rockbolt plays a key role in the mechanical properties, deformation characteristics and instability modes of rock mass support[2]. For instance, the shear test showed that the anchored surrounding rock mass obviously had tensile, shear and compression zone along the tunnel radius[3]. According to the rock-like simulation test, the shear deformation occurred in the middle of the rockbolt due to interlayer shear dislocation in the roof of deep surrounding rock[4]. In addition, in the investigation of hard brittle rock mass support, it was found that the failure of anchored rock mass was caused by the combined action of tensile and shear force. When the bolt had a small transverse deformation, The bolt would snap before it achieved the best support effect in the axial deformation[5], shown in fig.1(a).The maximum horizontal stress theory partly explained the shear failure of bolt[6]. Under the maximum horizontal stress, the roof and floor of the tunnel easily suffered shear load, the rockbolt is used to control the shear movement of rock mass in the direction perpendicular to the axialdirection, shown in fig. 1(b). (a) (b) Figure 1. Shear failure of the straight rockbolt in rock mass and its reason[5,6] Ludvig believed that the reinforcement capacity of the rockbolt is determined by its maximum radial deformation capacity and shear strength, the former depends on the direction of the rockbolt relative to the shear plane, and the latter depends on the strength parameters of the rockbolt[7]. Bjurstrom has systematically studied the shear behavior of granite under full-length anchorage. It is The straight rockbolt Shear International Conference on Modeling, Analysis, Simulation Technologies and Applications (MASTA 2019) Copyright © 2019, the Authors. Published by Atlantis Press. This is an open a","PeriodicalId":103896,"journal":{"name":"Proceedings of the 2019 International Conference on Modeling, Analysis, Simulation Technologies and Applications (MASTA 2019)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133682480","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":"Application of Genetic Algorithm and Simulated Annealing Algorithm for Course Scheduling Problem","authors":"Dengyuhui Li, Jiaji Shen, Huizhu Dong, Yiran Su, Zhi-gang Zhang","doi":"10.2991/MASTA-19.2019.69","DOIUrl":"https://doi.org/10.2991/MASTA-19.2019.69","url":null,"abstract":"In this paper, we propose a special course scheduling problem with class combination. By dismantling the restrictions of given classes, students with similar foundations are reorganized into new classes. It helps to improve the efficiency of the class and the acceptance of students. However, it is difficult to arrange new classes and time artificially, considering class capacity and the conflict with other courses. And as the number of class increases, the calculation time shows an exponential growth, which is an NP-hard problem. In order to solve this problem, we use genetic algorithm and simulated annealing algorithm to get the optimal solution. Introduction As one of the core contents of teaching management, class scheduling is an important indicator to measure the level of teaching management.[1] The intelligent automatic course arrangement is a NP-hard problem.[2] Nowadays, many universities face the problem of class recombination. That is, due to the different original capabilities of students, it is necessary to reorganize classes just for a certain course, to help the new class become more efficient and more active. In this paper, we use genetic algorithm and simulated annealing algorithm to discuss the course scheduling problem with class recombination, and analyze their results respectively. Our experiments come from real situation in the University of Science and Technology Beijing, taking the subject of English as an example. Problem Description We need to arrange English classes for 120 given classes. There are seven feasible periods, which are Tuesday's 1st, 2nd and 3rd lessons and Wednesday's 1st, 2nd, 3rd and 4th lessons. Before the English class, the Mathematics class time has been arranged, which is available for the 1st, 2nd and 3rd lessons on Monday, Wednesday, and Friday. According to the existing schedule, the time of the English class and the Mathematics class cannot be conflicted, and the course arrangement of the English class also has the following requirements: 1. The students are divided into five levels, each of which accounts for 10%, 10%, 20%, 40%, 20%. So there are five levels in each class. But the proportion of five levels in these classes is different, and it should be ensured that the sum of students of each level is equal to the pre-set proportion. 2. There are seven optional periods. Because the number of students in classes varies, we should pay attention to combine large and small classes, so that the number of new classes in each period is similar. 3. All students are divided into 7 periods. The number of students in each period should be equal to 1/7 of total students. At the same time, the number of students in each period is divided into 2-5 according to English level. and the ratio should be 1:2:4:2. As we can see, this problem belongs to integer programming, the equality of the above requirements can not be fully satisfied, so in the actual solution, we weaken it to the minimum error, that is, the dif","PeriodicalId":103896,"journal":{"name":"Proceedings of the 2019 International Conference on Modeling, Analysis, Simulation Technologies and Applications (MASTA 2019)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125057225","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":"LADRC-KALM Control Method Research for Three-motor Synchronous System","authors":"Hui Li, Jing Li","doi":"10.2991/MASTA-19.2019.13","DOIUrl":"https://doi.org/10.2991/MASTA-19.2019.13","url":null,"abstract":"","PeriodicalId":103896,"journal":{"name":"Proceedings of the 2019 International Conference on Modeling, Analysis, Simulation Technologies and Applications (MASTA 2019)","volume":"158 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114623695","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":"Research on Market Regulation of Online Car-hailing Travel Based on Tripartite Game","authors":"Xuan-ting Lee, Chenguang Zhao","doi":"10.2991/MASTA-19.2019.14","DOIUrl":"https://doi.org/10.2991/MASTA-19.2019.14","url":null,"abstract":"With the rapid development of the Internet, a new business model emerged as the times require, that is, online car appointment. The Internet platform acts as a transaction intermediary to match passengers and drivers reasonably, which saves time cost and achieves decision-making autonomy to a great extent. The purpose of this study is to solve the inevitable travel problems in the online car market and actively regulate the online car market. The research method of this paper is to construct a three-party evolutionary game, and build an evolutionary model by the government, the platform of online car contracting and the driver, and analyze its stability. The conclusion shows that the best strategy is that the government evolves from loose regulation to strict regulation. The platform of online car contracting gradually changes from passive regulation to active regulation, and the drivers of online car contracting operate legally and regularly. The government, the online car-booking platform and the driver are the interaction of various factors, and put forward relevant countermeasures and suggestions.","PeriodicalId":103896,"journal":{"name":"Proceedings of the 2019 International Conference on Modeling, Analysis, Simulation Technologies and Applications (MASTA 2019)","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132363309","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":"Thermal Structure Coupling Analysis of Friction Pair of Electronic Limited Slip Differential","authors":"Wei-Jia Chen, Jun Xiao, Zhi-zhu Liu, Chao Xiao","doi":"10.2991/MASTA-19.2019.29","DOIUrl":"https://doi.org/10.2991/MASTA-19.2019.29","url":null,"abstract":"In order to study the deformation mechanism of the friction pair of electronic limited slip differential, a coupled thermal-structural mathematical model of the friction pair is established. The temperature and stress field distribution of the friction pair are obtained by finite element method. This article analyzes the distribution characteristics of temperature and stress field, and obtains the relationship between temperature and pressure change of contact surface. The results show that under the differential starting condition, the temperature rise is obvious, and the steel disk has the possibility of warping deformation. In the future, during the optimal design of electronic limited slip differential, it can provides a reliable theoretical basis for the design of friction pairs. Introduction The electronic limited slip differential is a kind of differential which controls the automobile through the electronic control signal. When it works, it drives the wet clutch to distribute the torque of the left and right wheels so as to keep the automobile running smoothly. When a car encounters one side of the tire skidding, the electronic limited slip differential will get the signal and start to turn to the differential limited slip condition. The friction pair will begin to engage until the friction sheet and the dual steel sheet reach the same speed. In this process, the relative rotation of the friction sheet and the dual steel sheet will produce a lot of heat. The friction action in relative rotation includes not only the shearing of oil film in the clearance of friction pair, but also the shearing of micro-convex body on the surface of friction pair, which causes the internal stress of friction pair to rise until deformation and failure occur[1]. In the research of wet clutch friction pair at home and abroad, the simulation and analysis of temperature field and stress field of friction pair are mainly focused on, and the temperature distribution and stress field distribution in the process of friction pair engagement are obtained. Zagrodzki and Truncone[2,3] focus on thermoelastic instability and hot spot formation of wet clutch; Li and Barber, Jen and Nemecek[4,5] use instantaneous modal analysis method and full implicit finite difference numerical analysis method respectively to calculate temperature distribution of friction pairs. On this basis, Jiayuan Zhang and Puxian Ding[6] established the thermoelastic contact model of the friction pair, and gave the stress variation law of the friction sheet and the dual steel sheet during the bonding process. In this paper, the thermal deformation of friction pair of electronic limited slip differential under differential starting condition is studied and analyzed. Using ANSYS finite element analysis method, the thermal-structural coupling analysis of the friction pair of the wet clutch of the electronic limited slip differential is carried out, and the temperature and stress field distribution on th","PeriodicalId":103896,"journal":{"name":"Proceedings of the 2019 International Conference on Modeling, Analysis, Simulation Technologies and Applications (MASTA 2019)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129500361","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}