Pub Date : 2006-10-01DOI: 10.1109/IFOST.2006.312296
Dong-Ho Kim, Won-Joon Shin, Jin-Ho Park, Myung-Joon Lee
WebDAV is an IETF standard protocol which supports asynchronous collaborative authoring on the Web. The recently published WebDAV access control protocol provides various methods of controlling the resources on a WebDAV server and their properties, helping high-level collaborative works to be performed through the WebDAV server. Based on the WebDAV access control protocol, we developed a collaborative system named CoSlide which supports exchanging and/or sharing data among the members using the system. CoSlide provides Group workspaces - the shared spaces for the members in those groups as well as personal workspaces which are the private spaces on the Web for each user. In addition, it also provides open workspaces which support additional information exchanging methods for unsubscribed users. The CoSlide client has been developed as a windows application using .Net framework. The client also provides the ability to launch an authoring application from its WebDAV view, automatically locking, and downloading the content to be edited. We constructed the server for CoSlide using Jakarta Slide - a WebDAV server supporting the WebDAV access control protocol.
{"title":"Supporting Effective Collaborative Works Based on WebDAV","authors":"Dong-Ho Kim, Won-Joon Shin, Jin-Ho Park, Myung-Joon Lee","doi":"10.1109/IFOST.2006.312296","DOIUrl":"https://doi.org/10.1109/IFOST.2006.312296","url":null,"abstract":"WebDAV is an IETF standard protocol which supports asynchronous collaborative authoring on the Web. The recently published WebDAV access control protocol provides various methods of controlling the resources on a WebDAV server and their properties, helping high-level collaborative works to be performed through the WebDAV server. Based on the WebDAV access control protocol, we developed a collaborative system named CoSlide which supports exchanging and/or sharing data among the members using the system. CoSlide provides Group workspaces - the shared spaces for the members in those groups as well as personal workspaces which are the private spaces on the Web for each user. In addition, it also provides open workspaces which support additional information exchanging methods for unsubscribed users. The CoSlide client has been developed as a windows application using .Net framework. The client also provides the ability to launch an authoring application from its WebDAV view, automatically locking, and downloading the content to be edited. We constructed the server for CoSlide using Jakarta Slide - a WebDAV server supporting the WebDAV access control protocol.","PeriodicalId":103784,"journal":{"name":"2006 International Forum on Strategic Technology","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123988254","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}
Pub Date : 2006-10-01DOI: 10.1109/IFOST.2006.312309
V. Vasyukov
Gibbs (Markov) random fields are used as stochastic picture models in image processing because of their conceptual simplicity and due to the fact that Gibbs models are fit to synthesize algorithms based on Bayes approach. In this paper, we are concerned with Gibbs fields taking on values from finite sets. This restriction allows to overcome difficulties in estimating Gibbs distribution parameters and to synthesize some useful algorithms of image processing.
{"title":"Image Processing Algorithms Based on Finite-State Gibbs Models","authors":"V. Vasyukov","doi":"10.1109/IFOST.2006.312309","DOIUrl":"https://doi.org/10.1109/IFOST.2006.312309","url":null,"abstract":"Gibbs (Markov) random fields are used as stochastic picture models in image processing because of their conceptual simplicity and due to the fact that Gibbs models are fit to synthesize algorithms based on Bayes approach. In this paper, we are concerned with Gibbs fields taking on values from finite sets. This restriction allows to overcome difficulties in estimating Gibbs distribution parameters and to synthesize some useful algorithms of image processing.","PeriodicalId":103784,"journal":{"name":"2006 International Forum on Strategic Technology","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121524594","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}
Pub Date : 2006-10-01DOI: 10.1109/IFOST.2006.312315
Hong‐Hee Lee, H.M. Nguyen
This paper describes the proposed direct rotor-flux-oriented control (R-FOC) method using matrix converter fed induction motor. This method utilizes the advantages of R-FOC method and the advantages of matrix converter. This includes the energy saving, hardware compact designs of MC beside the fast response and easy implementation of R-FOC method. A simulation of the overall system has been carried out to validate the advantages of the proposed method.
{"title":"Direct Rotor-Flux-Oriented Control Method Using Matrix Converter Fed Induction Motor","authors":"Hong‐Hee Lee, H.M. Nguyen","doi":"10.1109/IFOST.2006.312315","DOIUrl":"https://doi.org/10.1109/IFOST.2006.312315","url":null,"abstract":"This paper describes the proposed direct rotor-flux-oriented control (R-FOC) method using matrix converter fed induction motor. This method utilizes the advantages of R-FOC method and the advantages of matrix converter. This includes the energy saving, hardware compact designs of MC beside the fast response and easy implementation of R-FOC method. A simulation of the overall system has been carried out to validate the advantages of the proposed method.","PeriodicalId":103784,"journal":{"name":"2006 International Forum on Strategic Technology","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122722643","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}
Pub Date : 2006-10-01DOI: 10.1109/IFOST.2006.312263
Kyung-Sick Lee, Sung-Jin Park, Young-sam Kim, Joon-sik Kim
The effects of strain rates and temperatures on the tensile properties of plastics were studied. Three types of plastics, which are used in the automotive instrument panel, were tested at various strain rates, and the stress-strain relations were obtained. And also tensile tests for the same plastics were performed at high and low temperatures, and the variations of the tensile properties with temperatures were acquired. The effects of the strain rates and temperatures on the tensile properties are discussed.
{"title":"Tensile Properties of Plastics used in Automotive Instrument Panel over some Ranges of Strain Rates and Temperatures","authors":"Kyung-Sick Lee, Sung-Jin Park, Young-sam Kim, Joon-sik Kim","doi":"10.1109/IFOST.2006.312263","DOIUrl":"https://doi.org/10.1109/IFOST.2006.312263","url":null,"abstract":"The effects of strain rates and temperatures on the tensile properties of plastics were studied. Three types of plastics, which are used in the automotive instrument panel, were tested at various strain rates, and the stress-strain relations were obtained. And also tensile tests for the same plastics were performed at high and low temperatures, and the variations of the tensile properties with temperatures were acquired. The effects of the strain rates and temperatures on the tensile properties are discussed.","PeriodicalId":103784,"journal":{"name":"2006 International Forum on Strategic Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129713950","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}
Pub Date : 2006-10-01DOI: 10.1109/IFOST.2006.312275
Guan-Chuh Luh, Wei‐Wen Liu
This paper proposes a potential filed immune network for dynamic navigation of mobile robots in an unknown environment with moving obstacles and targets. The velocity obstacle method is utilized to determine imminent obstacle collision of a robot moving in the time-varying environment. The response of the overall immune network is derived by the aid of fuzzy system. Simulation results are presented to verify the effectiveness of the proposed methodology in unknown environments with single and multiple moving obstacles.
{"title":"Potential Field Based Immune Network for Dynamic Motion Planning of Mobile Robots","authors":"Guan-Chuh Luh, Wei‐Wen Liu","doi":"10.1109/IFOST.2006.312275","DOIUrl":"https://doi.org/10.1109/IFOST.2006.312275","url":null,"abstract":"This paper proposes a potential filed immune network for dynamic navigation of mobile robots in an unknown environment with moving obstacles and targets. The velocity obstacle method is utilized to determine imminent obstacle collision of a robot moving in the time-varying environment. The response of the overall immune network is derived by the aid of fuzzy system. Simulation results are presented to verify the effectiveness of the proposed methodology in unknown environments with single and multiple moving obstacles.","PeriodicalId":103784,"journal":{"name":"2006 International Forum on Strategic Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128746560","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}
Pub Date : 2006-10-01DOI: 10.1109/IFOST.2006.312351
E. Kim, K. Lim, K. Lee
A functional automotive part, reaction shaft support, was fabricated by partial squeeze and vacuum die casting (PSVD) with light-weight Al-15% Si hypereutectic alloy which has good fluidity and excellent wear resistance. The effects of partial squeezing pressure and time-lag of PSVD process on the microstructure of the product were investigated. Measurement of specific gravity with the change of partial squeeze pressure and time-lag showed that the partial squeezing effect can be increased by increasing squeeze pressure and decreasing time-lag. However, too high a squeeze pressure and too a low time-lag brought about insufficient squeezing effect due to instant movement to the squeeze plunger stroke end point. Through the combination of vacuum suction before melt injection and partial squeezing after melt injection in PSVD process, light-weight Al-15% Si alloy reaction shaft support was successfully developed, resulting in excellent microstructural and mechanical properties.
{"title":"Characterization of Partial Squeeze and Vacuum Die Casting Process in Fabricating Automobile Parts","authors":"E. Kim, K. Lim, K. Lee","doi":"10.1109/IFOST.2006.312351","DOIUrl":"https://doi.org/10.1109/IFOST.2006.312351","url":null,"abstract":"A functional automotive part, reaction shaft support, was fabricated by partial squeeze and vacuum die casting (PSVD) with light-weight Al-15% Si hypereutectic alloy which has good fluidity and excellent wear resistance. The effects of partial squeezing pressure and time-lag of PSVD process on the microstructure of the product were investigated. Measurement of specific gravity with the change of partial squeeze pressure and time-lag showed that the partial squeezing effect can be increased by increasing squeeze pressure and decreasing time-lag. However, too high a squeeze pressure and too a low time-lag brought about insufficient squeezing effect due to instant movement to the squeeze plunger stroke end point. Through the combination of vacuum suction before melt injection and partial squeezing after melt injection in PSVD process, light-weight Al-15% Si alloy reaction shaft support was successfully developed, resulting in excellent microstructural and mechanical properties.","PeriodicalId":103784,"journal":{"name":"2006 International Forum on Strategic Technology","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130288910","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}
Pub Date : 2006-10-01DOI: 10.1109/IFOST.2006.312307
Kan-San Kim, G. Chung
This paper presents the growth conditions and characteristics of polycrystalline 3C-SiC thin-films for microsensors related to vehicle engine fields. The growth of the poly 3C-SiC thin-films on the oxided Si (100) wafers was been carried out by APCVD using HMDS precursor. To obtain an optimized growth condition, we have performed depositions under various conditions that temperature was adjusted from 1000 degC to 1200 degC, HMDS flow rates was changed from 5 to 9 sccm, and carrier gas (Ar) was kept up 500 seem. Each samples were analyzed by XRD (X-ray diffraction), XPS (X-ray photoelectron spectroscopy), and FT-IR (Fourier transform-infrared spectroscopy) to find the optimized growth condition. Also, layer density, voids, and dislocations of the cross-section were measured by SEM (scanning electron microscope). From the results of experiment, we have obtained that temperature and HMDS flow rates of the optimized poly 3C-SiC thin-film growth condition were 1000 degC and 8 sccm, respectively.
{"title":"Crystal Growth of 3C-SiC Thin-Films on Si Wafers for Microsensors of Vehicle Engines","authors":"Kan-San Kim, G. Chung","doi":"10.1109/IFOST.2006.312307","DOIUrl":"https://doi.org/10.1109/IFOST.2006.312307","url":null,"abstract":"This paper presents the growth conditions and characteristics of polycrystalline 3C-SiC thin-films for microsensors related to vehicle engine fields. The growth of the poly 3C-SiC thin-films on the oxided Si (100) wafers was been carried out by APCVD using HMDS precursor. To obtain an optimized growth condition, we have performed depositions under various conditions that temperature was adjusted from 1000 degC to 1200 degC, HMDS flow rates was changed from 5 to 9 sccm, and carrier gas (Ar) was kept up 500 seem. Each samples were analyzed by XRD (X-ray diffraction), XPS (X-ray photoelectron spectroscopy), and FT-IR (Fourier transform-infrared spectroscopy) to find the optimized growth condition. Also, layer density, voids, and dislocations of the cross-section were measured by SEM (scanning electron microscope). From the results of experiment, we have obtained that temperature and HMDS flow rates of the optimized poly 3C-SiC thin-film growth condition were 1000 degC and 8 sccm, respectively.","PeriodicalId":103784,"journal":{"name":"2006 International Forum on Strategic Technology","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126462547","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}
Pub Date : 2006-10-01DOI: 10.1109/IFOST.2006.312327
Hong-Seok Park, V. Le, Gyu-Bong Lee
The main purpose of this paper was to integrate CAD-CAPP-CAD system with optimizing cutting parameters for machining mold die. Due to the complexity of the machining process injection mold, its optimization as well as its optimal control is difficult to perform. Optimization of the cutting process needs efficient means for determining the optimal cutting parameters in order to minimize machining time and simultaneously preserve the quality of machining surface. With the recent development in CAD/CAM software, manufacturing engineers can proceed with the process planning problems, without knowing functional relationship between process input and process output in advance. In this study, the machining simulation in CATIA is used to obtain the results as initial inputs of optimal analysis. The response surface methodology (RSM) is used to analyze the cutting parameters such as cutting speed, feedrate, radial and axial depth of cut, and machining tolerance. Then this process will be integrated into process chain system that we have developed in the previous research.
{"title":"An Integrated CAD-CAPP-CAM System for Machining Mold Die With Optimal Cutting Parameters","authors":"Hong-Seok Park, V. Le, Gyu-Bong Lee","doi":"10.1109/IFOST.2006.312327","DOIUrl":"https://doi.org/10.1109/IFOST.2006.312327","url":null,"abstract":"The main purpose of this paper was to integrate CAD-CAPP-CAD system with optimizing cutting parameters for machining mold die. Due to the complexity of the machining process injection mold, its optimization as well as its optimal control is difficult to perform. Optimization of the cutting process needs efficient means for determining the optimal cutting parameters in order to minimize machining time and simultaneously preserve the quality of machining surface. With the recent development in CAD/CAM software, manufacturing engineers can proceed with the process planning problems, without knowing functional relationship between process input and process output in advance. In this study, the machining simulation in CATIA is used to obtain the results as initial inputs of optimal analysis. The response surface methodology (RSM) is used to analyze the cutting parameters such as cutting speed, feedrate, radial and axial depth of cut, and machining tolerance. Then this process will be integrated into process chain system that we have developed in the previous research.","PeriodicalId":103784,"journal":{"name":"2006 International Forum on Strategic Technology","volume":"42 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127337919","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}
Pub Date : 2006-10-01DOI: 10.1109/IFOST.2006.312303
Gyung-Man Kim, Jung-Reol Ahn, T. Chun, Sang-Bock Cho
A common rail and injector is controlled by engine ECU (electrical control unit) with many input sensors in HSDI (high speed direct injection) diesel engine. The engine ECU plays the most important role in controlling the diesel engine. It is important to analyze the operations of engine ECU with a variation of data of input sensors. A simulator is necessary in order to observe easily both the operating conditions and fault situations of engine ECU. In this paper, the characteristics of input sensors and their interface circuits in the engine ECU are analyzed, and the system for generating waveforms of all input sensors is implemented by both the 16-bit DSP TMS320LF2407 and host computer. The simulator of engine ECU is applied to a real vehicle in order to investigate the operations of ECU with a variation of input sensors data.
{"title":"Method for Implementing Characteristics of Input Sensors in the Simulator of Common Rail Engine ECU","authors":"Gyung-Man Kim, Jung-Reol Ahn, T. Chun, Sang-Bock Cho","doi":"10.1109/IFOST.2006.312303","DOIUrl":"https://doi.org/10.1109/IFOST.2006.312303","url":null,"abstract":"A common rail and injector is controlled by engine ECU (electrical control unit) with many input sensors in HSDI (high speed direct injection) diesel engine. The engine ECU plays the most important role in controlling the diesel engine. It is important to analyze the operations of engine ECU with a variation of data of input sensors. A simulator is necessary in order to observe easily both the operating conditions and fault situations of engine ECU. In this paper, the characteristics of input sensors and their interface circuits in the engine ECU are analyzed, and the system for generating waveforms of all input sensors is implemented by both the 16-bit DSP TMS320LF2407 and host computer. The simulator of engine ECU is applied to a real vehicle in order to investigate the operations of ECU with a variation of input sensors data.","PeriodicalId":103784,"journal":{"name":"2006 International Forum on Strategic Technology","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131190699","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}
Pub Date : 2006-10-01DOI: 10.1109/IFOST.2006.312218
O. Khasanov, E. Dvilis, V. Sokolov, Y. Pokholkov
The compressibility of the dry BaTi4O9+BaWO4 (BWTO) and ZrO2-3% Y2O3 (TZ-3YS) nanopowders compacted by the ordinary uniaxial pressing, under powerful ultrasonic action (PUA) and by the novel collector method have been investigated. The coefficients of the logarithmic compaction equation in dimensionless form were determined from the experimental compaction diagrams. The BWTO nanopowder had low elastic component of these curves and low springback. The samples of parallelepiped shape (14 mm times 9 mm times 2 mm) were pressed. To decrease the shape distortion of sintered ceramics the green density difference along compaction axis was investigated. It was shown the possibility of green density difference reduction using PUA and collector method at optimal conditions. The uniform distributions of density in volume of the green compacts were achieved at compaction pressure of 640 MPa and power of ultrasonic generator of 2 kW at resonance frequency of 21 kHz.
研究了普通单轴压实、强超声作用(PUA)和新型捕集剂压实BaTi4O9+BaWO4 (BWTO)和ZrO2-3% Y2O3 (TZ-3YS)纳米粉体的可压缩性。根据实验压实图确定了对数压实方程的无因次形式系数。BWTO纳米粉体具有这些曲线的低弹性成分和低回弹。对平行六面体形状(14 mm × 9 mm × 2 mm)的样品进行压制。为了减小烧结陶瓷的形状畸变，研究了沿压实轴方向的生坯密度差。结果表明，在最佳条件下，采用聚丙烯酸(PUA)和捕集剂可以减小绿密度差。当压实压力为640 MPa，超声发生器功率为2 kW，共振频率为21 kHz时，绿坯的密度体积分布均匀。
{"title":"The Control of Shape and Compaction Characteristics of Dry Ba-W-Ti-O Nanopowders by the Powerful Ultrasonic Action","authors":"O. Khasanov, E. Dvilis, V. Sokolov, Y. Pokholkov","doi":"10.1109/IFOST.2006.312218","DOIUrl":"https://doi.org/10.1109/IFOST.2006.312218","url":null,"abstract":"The compressibility of the dry BaTi4O9+BaWO4 (BWTO) and ZrO2-3% Y2O3 (TZ-3YS) nanopowders compacted by the ordinary uniaxial pressing, under powerful ultrasonic action (PUA) and by the novel collector method have been investigated. The coefficients of the logarithmic compaction equation in dimensionless form were determined from the experimental compaction diagrams. The BWTO nanopowder had low elastic component of these curves and low springback. The samples of parallelepiped shape (14 mm times 9 mm times 2 mm) were pressed. To decrease the shape distortion of sintered ceramics the green density difference along compaction axis was investigated. It was shown the possibility of green density difference reduction using PUA and collector method at optimal conditions. The uniform distributions of density in volume of the green compacts were achieved at compaction pressure of 640 MPa and power of ultrasonic generator of 2 kW at resonance frequency of 21 kHz.","PeriodicalId":103784,"journal":{"name":"2006 International Forum on Strategic Technology","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115602436","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：