Pub Date : 2003-03-23DOI: 10.1109/PERCOM.2003.1192789
Gen Hattori, S. Nishiyama, C. Ono, H. Horiuchi
We discuss the design issues on lightweight and FIPA compliant agent platform for Java-enabled mobile phones and describe the design of such agent platform. This platform changes Java-enabled mobile phones to ubiquitous terminals by providing place for agent applications. Combined with location services, it can be used for various ubiquitous services. We also show the performance comparison of the prototype with LEAP, another lightweight agent platform.
{"title":"Making Java-enabled mobile phone as ubiquitous terminal by lightweight FIPA compliant agent platform","authors":"Gen Hattori, S. Nishiyama, C. Ono, H. Horiuchi","doi":"10.1109/PERCOM.2003.1192789","DOIUrl":"https://doi.org/10.1109/PERCOM.2003.1192789","url":null,"abstract":"We discuss the design issues on lightweight and FIPA compliant agent platform for Java-enabled mobile phones and describe the design of such agent platform. This platform changes Java-enabled mobile phones to ubiquitous terminals by providing place for agent applications. Combined with location services, it can be used for various ubiquitous services. We also show the performance comparison of the prototype with LEAP, another lightweight agent platform.","PeriodicalId":230787,"journal":{"name":"Proceedings of the First IEEE International Conference on Pervasive Computing and Communications, 2003. (PerCom 2003).","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121092281","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 : 2003-03-23DOI: 10.1109/PERCOM.2003.1192771
Heisuke Kaneko, Y. Fukazawa, Fumihiro Kumeno, Nobukazu Yoshioka, S. Honiden
As mobile computing becomes common, the battery issue of mobile computing devices has become increasingly notable. To this end, research and development of various power-conservation devices and methods are actively taking place. However, the conventional method of extending the battery life through power-conservation can never prevent the unintentional shutdowns of applications due to a dead battery. This research aims to realize the evacuation of applications on a mobile computing device to another device before the battery runs out by creating the application as a mobile agent. In particular, by introducing the concept of the Crisis Management Center, dynamic and smooth evacuation of multiple application agents will become possible. The paper explains and verifies the effectiveness of the EASTER (Escape Agent System from dying batTERy), a system developed for the purpose of recovering the applications when a battery is running out through the use of a mobile agent system.
随着移动计算的普及，移动计算设备的电池问题变得越来越引人注目。为此，各种节能装置和节能方法的研究和开发正在积极进行。然而，通过节能来延长电池寿命的传统方法永远无法防止由于电池耗尽而导致的应用程序意外关闭。本研究旨在通过将移动计算设备上的应用程序创建为移动代理，实现在电池耗尽之前将应用程序转移到另一个设备上。特别是，通过引入危机管理中心的概念，将使多个应用代理的动态、平稳撤离成为可能。本文阐述并验证了EASTER (Escape Agent System from dying batTERy)系统的有效性，该系统是为了在电池耗尽时通过使用移动代理系统恢复应用程序而开发的。
{"title":"Mobile agent based evacuation system when the battery runs out: EASTER","authors":"Heisuke Kaneko, Y. Fukazawa, Fumihiro Kumeno, Nobukazu Yoshioka, S. Honiden","doi":"10.1109/PERCOM.2003.1192771","DOIUrl":"https://doi.org/10.1109/PERCOM.2003.1192771","url":null,"abstract":"As mobile computing becomes common, the battery issue of mobile computing devices has become increasingly notable. To this end, research and development of various power-conservation devices and methods are actively taking place. However, the conventional method of extending the battery life through power-conservation can never prevent the unintentional shutdowns of applications due to a dead battery. This research aims to realize the evacuation of applications on a mobile computing device to another device before the battery runs out by creating the application as a mobile agent. In particular, by introducing the concept of the Crisis Management Center, dynamic and smooth evacuation of multiple application agents will become possible. The paper explains and verifies the effectiveness of the EASTER (Escape Agent System from dying batTERy), a system developed for the purpose of recovering the applications when a battery is running out through the use of a mobile agent system.","PeriodicalId":230787,"journal":{"name":"Proceedings of the First IEEE International Conference on Pervasive Computing and Communications, 2003. (PerCom 2003).","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125848848","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 : 2003-03-23DOI: 10.1109/PERCOM.2003.1192785
A. Helal, B. Winkler, Choonhwa Lee, Y. Kaddoura, Lisa Ran, C. Giraldo, Sree Kuchibhotla, W. Mann
The Pervasive Computing Laboratory at the University of Florida is dedicated to creating smart environments and assistants to enable elderly persons to live a longer and a more independent life at home. By achieving this goal, technology will increase the chances of successful aging despite an ailing health care system (e.g. Medicaid). One of the essential services required to maximize the intelligence of a smart environment is an indoor precision tracking system. Such system allows the smart home to make proactive decisions to better serve its occupants by enabling context-awareness instead of being solely reactive to their commands. This paper presents our hands-on experience and lessons learnt from our first phase work to build up a smart home infrastructure for the elderly. We review location tracking technology and describe the rationale behind our choice of the emerging ultrasonic sensor technology. We give an overview of the House of Matilda (an in-laboratory mock up house) and describe our design of a precision in-door tracking system. We also describe an OSGi-based robust framework that abstracts the ultrasonic technology into a standard service to enable the creation of tracking based applications by third party, and to facilitate the collaboration among various devices and other OSGi services. Finally, we describe three pervasive computing applications that use the location-tracking system which we have implemented in Matilda's house.
{"title":"Enabling location-aware pervasive computing applications for the elderly","authors":"A. Helal, B. Winkler, Choonhwa Lee, Y. Kaddoura, Lisa Ran, C. Giraldo, Sree Kuchibhotla, W. Mann","doi":"10.1109/PERCOM.2003.1192785","DOIUrl":"https://doi.org/10.1109/PERCOM.2003.1192785","url":null,"abstract":"The Pervasive Computing Laboratory at the University of Florida is dedicated to creating smart environments and assistants to enable elderly persons to live a longer and a more independent life at home. By achieving this goal, technology will increase the chances of successful aging despite an ailing health care system (e.g. Medicaid). One of the essential services required to maximize the intelligence of a smart environment is an indoor precision tracking system. Such system allows the smart home to make proactive decisions to better serve its occupants by enabling context-awareness instead of being solely reactive to their commands. This paper presents our hands-on experience and lessons learnt from our first phase work to build up a smart home infrastructure for the elderly. We review location tracking technology and describe the rationale behind our choice of the emerging ultrasonic sensor technology. We give an overview of the House of Matilda (an in-laboratory mock up house) and describe our design of a precision in-door tracking system. We also describe an OSGi-based robust framework that abstracts the ultrasonic technology into a standard service to enable the creation of tracking based applications by third party, and to facilitate the collaboration among various devices and other OSGi services. Finally, we describe three pervasive computing applications that use the location-tracking system which we have implemented in Matilda's house.","PeriodicalId":230787,"journal":{"name":"Proceedings of the First IEEE International Conference on Pervasive Computing and Communications, 2003. (PerCom 2003).","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125374528","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 : 2003-03-23DOI: 10.1109/PERCOM.2003.1192736
M. Youssef, A. Agrawala, A. Shankar
We present a WLAN location determination technique, the Joint Clustering technique, that uses: (1) signal strength probability distributions to address the noisy wireless channel, and (2) clustering of locations to reduce the computational cost of searching the radio map. The Joint Clustering technique reduces computational cost by more than an order of magnitude, compared to the current state of the art techniques, allowing non-centralized implementation on mobile clients. Results from 802.11-equipped iPAQ implementations show that the new technique gives user location to within 7 feet with over 90% accuracy.
{"title":"WLAN location determination via clustering and probability distributions","authors":"M. Youssef, A. Agrawala, A. Shankar","doi":"10.1109/PERCOM.2003.1192736","DOIUrl":"https://doi.org/10.1109/PERCOM.2003.1192736","url":null,"abstract":"We present a WLAN location determination technique, the Joint Clustering technique, that uses: (1) signal strength probability distributions to address the noisy wireless channel, and (2) clustering of locations to reduce the computational cost of searching the radio map. The Joint Clustering technique reduces computational cost by more than an order of magnitude, compared to the current state of the art techniques, allowing non-centralized implementation on mobile clients. Results from 802.11-equipped iPAQ implementations show that the new technique gives user location to within 7 feet with over 90% accuracy.","PeriodicalId":230787,"journal":{"name":"Proceedings of the First IEEE International Conference on Pervasive Computing and Communications, 2003. (PerCom 2003).","volume":"116 50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124535772","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 : 2003-03-23DOI: 10.1109/PERCOM.2003.1192775
J. Wams, M. V. Steen
Pervasive messaging is the part of pervasive computing that enables users to communicate with each other. Many of today's electronic messaging systems have their own distinct merits and peculiarities. Pervasive messaging will have to shield the user from these differences. In this paper we introduce a taxonomy for electronic messaging systems, providing a uniform way to analyze, compare, and discuss electronic messaging systems. With this taxonomy, we analyze the current practice, demonstrating its shortfalls. To overcome these shortfalls, we introduce a novel messaging model: the unified messaging system. This system can, in fact, mimic any electronic messaging system, thus providing powerful unified messaging.
{"title":"Pervasive messaging","authors":"J. Wams, M. V. Steen","doi":"10.1109/PERCOM.2003.1192775","DOIUrl":"https://doi.org/10.1109/PERCOM.2003.1192775","url":null,"abstract":"Pervasive messaging is the part of pervasive computing that enables users to communicate with each other. Many of today's electronic messaging systems have their own distinct merits and peculiarities. Pervasive messaging will have to shield the user from these differences. In this paper we introduce a taxonomy for electronic messaging systems, providing a uniform way to analyze, compare, and discuss electronic messaging systems. With this taxonomy, we analyze the current practice, demonstrating its shortfalls. To overcome these shortfalls, we introduce a novel messaging model: the unified messaging system. This system can, in fact, mimic any electronic messaging system, thus providing powerful unified messaging.","PeriodicalId":230787,"journal":{"name":"Proceedings of the First IEEE International Conference on Pervasive Computing and Communications, 2003. (PerCom 2003).","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123520481","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 : 2003-03-23DOI: 10.1109/PERCOM.2003.1192732
Xiaohui Gu, K. Nahrstedt, A. Messer, I. Greenberg, D. Milojicic
Pervasive computing allows a user to access an application on heterogeneous devices continuously and consistently. However it is challenging to deliver complex applications on resource-constrained mobile devices, such as cellular telephones and PDA. Different approaches, such as application-based or system-based adaptations, have been proposed to address the problem. However existing solutions often require degrading application fidelity. We believe that this problem can be overcome by dynamically partitioning the application and offloading part of the application execution to a powerful nearby surrogate. This will enable pervasive application delivery to be realized without significant fidelity degradation or expensive application rewriting. Because pervasive computing environments are highly dynamic, the runtime offloading system needs to adapt to both application execution patterns and resource fluctuations. Using the fuzzy control model, we have developed an offloading inference engine to adaptively solve two key decision-making problems during runtime offloading: (1) timely triggering of adaptive offloading, and (2) intelligent selection of an application partitioning policy. Extensive trace-driven evaluations show the effectiveness of the offloading inference engine.
{"title":"Adaptive offloading inference for delivering applications in pervasive computing environments","authors":"Xiaohui Gu, K. Nahrstedt, A. Messer, I. Greenberg, D. Milojicic","doi":"10.1109/PERCOM.2003.1192732","DOIUrl":"https://doi.org/10.1109/PERCOM.2003.1192732","url":null,"abstract":"Pervasive computing allows a user to access an application on heterogeneous devices continuously and consistently. However it is challenging to deliver complex applications on resource-constrained mobile devices, such as cellular telephones and PDA. Different approaches, such as application-based or system-based adaptations, have been proposed to address the problem. However existing solutions often require degrading application fidelity. We believe that this problem can be overcome by dynamically partitioning the application and offloading part of the application execution to a powerful nearby surrogate. This will enable pervasive application delivery to be realized without significant fidelity degradation or expensive application rewriting. Because pervasive computing environments are highly dynamic, the runtime offloading system needs to adapt to both application execution patterns and resource fluctuations. Using the fuzzy control model, we have developed an offloading inference engine to adaptively solve two key decision-making problems during runtime offloading: (1) timely triggering of adaptive offloading, and (2) intelligent selection of an application partitioning policy. Extensive trace-driven evaluations show the effectiveness of the offloading inference engine.","PeriodicalId":230787,"journal":{"name":"Proceedings of the First IEEE International Conference on Pervasive Computing and Communications, 2003. (PerCom 2003).","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122070373","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 : 2003-03-23DOI: 10.1109/PERCOM.2003.1192743
Simon G. M. Koo, C. Rosenberg, H. Chan, Yat Chung Lee
In our previous work, we have designed, using a network-based approach, and are currently deploying on Purdue wireless infrastructure, a Web service for location discovery of 802.11-based mobile devices. This paper presents a novel web-based application called remote printing service (RPS) which is entirely built on top of our location discovery service (LODS). RPS is not only capable of locating the nearest printers but also allows mobile users to print without having to install any printer drivers. Most of the time users can print even without having to download the file to the mobile device. We have also designed a prototype for a network-based personal paging system that provides active paging and active email notification capability for mobile users. These value-added wireless services contribute to the building and promotion of an e-campus community.
{"title":"Location-based e-campus web services: from design to deployment","authors":"Simon G. M. Koo, C. Rosenberg, H. Chan, Yat Chung Lee","doi":"10.1109/PERCOM.2003.1192743","DOIUrl":"https://doi.org/10.1109/PERCOM.2003.1192743","url":null,"abstract":"In our previous work, we have designed, using a network-based approach, and are currently deploying on Purdue wireless infrastructure, a Web service for location discovery of 802.11-based mobile devices. This paper presents a novel web-based application called remote printing service (RPS) which is entirely built on top of our location discovery service (LODS). RPS is not only capable of locating the nearest printers but also allows mobile users to print without having to install any printer drivers. Most of the time users can print even without having to download the file to the mobile device. We have also designed a prototype for a network-based personal paging system that provides active paging and active email notification capability for mobile users. These value-added wireless services contribute to the building and promotion of an e-campus community.","PeriodicalId":230787,"journal":{"name":"Proceedings of the First IEEE International Conference on Pervasive Computing and Communications, 2003. (PerCom 2003).","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121580342","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 : 2003-03-23DOI: 10.1109/PERCOM.2003.1192762
F. Siegemund, C. Floerkemeier
Passive RFID technology and unobtrusive Bluetooth-enabled active tags are means to augment products and everyday objects with information technology invisible to human users. This paper analyzes general interaction patterns in such pervasive computing settings where information about the user's context is derived by a combination of active and passive tags present in the user's environment. The concept of invisible preselection of interaction partners based on the user's context is introduced It enables unobtrusive interaction with smart objects in that it combines different forms of association, e.g. implicit and user initiated association, by transferring interaction stubs to mobile devices based on the user's current situation. Invisible preselection can also be used for remote interaction. By assigning phone numbers to smart objects, we propose making this remote user interaction with everyday items as easy as making a phone call. We evaluate the suitability of the proposed concepts on the basis of three concrete examples: a product monitoring system, a smart medicine cabinet, and a remote interaction application.
{"title":"Interaction in pervasive computing settings using Bluetooth-enabled active tags and passive RFID technology together with mobile phones","authors":"F. Siegemund, C. Floerkemeier","doi":"10.1109/PERCOM.2003.1192762","DOIUrl":"https://doi.org/10.1109/PERCOM.2003.1192762","url":null,"abstract":"Passive RFID technology and unobtrusive Bluetooth-enabled active tags are means to augment products and everyday objects with information technology invisible to human users. This paper analyzes general interaction patterns in such pervasive computing settings where information about the user's context is derived by a combination of active and passive tags present in the user's environment. The concept of invisible preselection of interaction partners based on the user's context is introduced It enables unobtrusive interaction with smart objects in that it combines different forms of association, e.g. implicit and user initiated association, by transferring interaction stubs to mobile devices based on the user's current situation. Invisible preselection can also be used for remote interaction. By assigning phone numbers to smart objects, we propose making this remote user interaction with everyday items as easy as making a phone call. We evaluate the suitability of the proposed concepts on the basis of three concrete examples: a product monitoring system, a smart medicine cabinet, and a remote interaction application.","PeriodicalId":230787,"journal":{"name":"Proceedings of the First IEEE International Conference on Pervasive Computing and Communications, 2003. (PerCom 2003).","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128273781","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 : 2003-03-23DOI: 10.1109/PERCOM.2003.1192772
Philipp Steurer, M. Srivastava
The paper describes the system design of Smart Table, a table that can track and identify multiple objects simultaneously when placed on top of its surface. The table has been designed to support a smart problem-solving environment for early childhood education in a project called "Smart Kindergarten". We introduce our technology and present the incorporation of location information and identification provided by Smart Table into context-aware computing applications. In addition, the paper discusses the prototype design, localization algorithm, and the results from final implementation.
{"title":"System design of Smart Table","authors":"Philipp Steurer, M. Srivastava","doi":"10.1109/PERCOM.2003.1192772","DOIUrl":"https://doi.org/10.1109/PERCOM.2003.1192772","url":null,"abstract":"The paper describes the system design of Smart Table, a table that can track and identify multiple objects simultaneously when placed on top of its surface. The table has been designed to support a smart problem-solving environment for early childhood education in a project called \"Smart Kindergarten\". We introduce our technology and present the incorporation of location information and identification provided by Smart Table into context-aware computing applications. In addition, the paper discusses the prototype design, localization algorithm, and the results from final implementation.","PeriodicalId":230787,"journal":{"name":"Proceedings of the First IEEE International Conference on Pervasive Computing and Communications, 2003. (PerCom 2003).","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131316313","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 : 2003-03-23DOI: 10.1109/PERCOM.2003.1192760
S. Vivek, Kenneth Tso, D. D. Roure
The open hypermedia model is based upon the separation of hypertext links from documents and treats them as separate entities. Distributed link services take this approach and implement an open hypermedia system above the infrastructure of the World Wide Web. This paper explores the suitability and applicability of extending the architecture of distributed link services by adding a messaging backbone based on secure asynchronous message passing, which provides support for mobile users of distributed hypermedia information systems.
{"title":"Mobile link services with MQSeries Everyplace","authors":"S. Vivek, Kenneth Tso, D. D. Roure","doi":"10.1109/PERCOM.2003.1192760","DOIUrl":"https://doi.org/10.1109/PERCOM.2003.1192760","url":null,"abstract":"The open hypermedia model is based upon the separation of hypertext links from documents and treats them as separate entities. Distributed link services take this approach and implement an open hypermedia system above the infrastructure of the World Wide Web. This paper explores the suitability and applicability of extending the architecture of distributed link services by adding a messaging backbone based on secure asynchronous message passing, which provides support for mobile users of distributed hypermedia information systems.","PeriodicalId":230787,"journal":{"name":"Proceedings of the First IEEE International Conference on Pervasive Computing and Communications, 2003. (PerCom 2003).","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133393464","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：