Based on the methods of acquaintance cache and group-based intelligent forwarding of service recommendations,a novel group-based active service(GAS) protocol for migrating workflows was proposed.This protocol did not ...Based on the methods of acquaintance cache and group-based intelligent forwarding of service recommendations,a novel group-based active service(GAS) protocol for migrating workflows was proposed.This protocol did not require service requesters to discover services or resources.The semantic acquaintance knowledge representation was exploited to describe service groups and this semantic information was used to recommend service to respective clients.The experimental results show that the new protocol proposed offers better performance than other protocols in terms of first-response-time,success-scope and ratio of success-packet-number to total-packet-number.When the number of service request packet is 20,the first-response-time of GAS protocol is only 5.1 s,which is significantly lower than that of other protocols.The success-scope of GAS protocol is 49.1%,showing that GAS protocol can effectively improve the reliability of mobile transactions.And the ratio of success-packet-number to total-packet-number of GAS protocol is up to 0.080,which is obviously higher than that of other protocols.展开更多
With the development of the Internet of Things(Io T), people's lives have become increasingly convenient. It is desirable for smart home(SH) systems to integrate and leverage the enormous information available fro...With the development of the Internet of Things(Io T), people's lives have become increasingly convenient. It is desirable for smart home(SH) systems to integrate and leverage the enormous information available from IoT. Information can be analyzed to learn user intentions and automatically provide the appropriate services. However, existing service recommendation models typically do not consider the services that are unavailable in a user's living environment. In order to address this problem, we propose a series of semantic models for SH devices. These semantic models can be used to infer user intentions. Based on the models, we proposed a service recommendation probability model and an alternative-service recommending algorithm. The algorithm is devoted to providing appropriate alternative services when the desired service is unavailable. The algorithm has been implemented and achieves accuracy higher than traditional Hidden Markov Model(HMM). The maximum accuracy achieved is 68.3%.展开更多
The elderly are the main objects of college students’volunteer service activities.At present,there are various forms of college students’volunteer service activities,which are highly valued by colleges and universit...The elderly are the main objects of college students’volunteer service activities.At present,there are various forms of college students’volunteer service activities,which are highly valued by colleges and universities and popular among college students.In order to further improve the mental health of the elderly,it could be achieved through paths like strengthening volunteering cooperation with aged services agencies,implementing the volunteer service mechanism of“one person-one file,one person-one policy”for the elderly,establishing a mental health mentor system for volunteer service activities,improving the mental health knowledge level of college student volunteers,carrying out a series of voluntary service activities with the theme of mental health,attaching importance on cultivating the positive and optimistic attitude of the elderly in volunteer service activities,and launching volunteer service activities to enrich the spiritual and cultural life of the elderly.展开更多
According to the latest research of ecosystem service（ ES）,the background and connotation of ecosystem services were briefly summarized,the relationship among human activity,climate change,and biodiversity and ecosy...According to the latest research of ecosystem service（ ES）,the background and connotation of ecosystem services were briefly summarized,the relationship among human activity,climate change,and biodiversity and ecosystem service function（ ESF） was synthetically analyzed,the research trends of ecosystem services function assessment（ ESFA） were discussed from multi-scale,and the perspectives was given based on the past studies. The ecological long-term location monitoring method based on the ESFA should be studied,evaluation index of ESFA should be further improved,and the ESF research on the arid region should be reinforced.展开更多
Cross-border e-commerce(CBEC)significantly stimulates foreign trade development and the flow of goods and services.This study,using Chinese city-level data and a multiperiod difference-in-differences model based on CB...Cross-border e-commerce(CBEC)significantly stimulates foreign trade development and the flow of goods and services.This study,using Chinese city-level data and a multiperiod difference-in-differences model based on CBEC comprehensive pilot zones,explores the impact of CBEC reform on urban service industry entrepreneurship.The results show that CBEC reform increased entrepreneurial activity,and this is confirmed by robustness tests.The mechanisms driving this efect include the attraction of foreign direct investment,improved information infrastructure,and talent development.Regional analysis reveals stronger effects in central,western,and noncoastal cities,and industry analysis highlights public and consumer services.Spatial heterogeneity shows that the reform's impact diminished with distance from pilot zones,with potential inhibitory efects in remote areas.This study demonstrates how CBEC reform can stimulate entrepreneurship and foster economicgrowth.展开更多
A network communication and recording system based on China-made ARCA SOC and embedded Linux operating system is introduced in this paper. It supports TCP/IP network communication protocol and mass storage medium. It ...A network communication and recording system based on China-made ARCA SOC and embedded Linux operating system is introduced in this paper. It supports TCP/IP network communication protocol and mass storage medium. It has strong points of self-monitor, low power consumption, high timing accuracy, high reliability of operation, etc. It can serve up to 20 centers real-time waveform data at the same time. It meets not only the requirements of physical networking observation, but also virtual networking observation based on Internet in which real-time data transmission is required. Its ability of field recording also meets the requirements of portable seismic observation, strong motion observation and seismic exploration observation, etc.展开更多
The Chinese Government and citizens face enormous challenges of disaster management as widespread devastation,economic damages,and loss of human lives caused by increasing natural disasters.Disaster management require...The Chinese Government and citizens face enormous challenges of disaster management as widespread devastation,economic damages,and loss of human lives caused by increasing natural disasters.Disaster management requires a complicated iterative process that includes disaster monitoring,early detection,forecasting,loss assessment,and efficient analysis of disaster reduction.Each task typically involves the use of technologists and multiple geospatial information resources,including sensors,data sources,models,geo-tools,software packages,and computing resources.However,most existing disaster management systems operate in a typical passive data-centric mode,where resources cannot be fully utilized.This impediment is partially being addressed by the increasingly complex application requirements and the growing availability of diverse resources.In this paper,we summarize and analyze the practical problems experienced by the National Disaster Reduction Application System of China.To address the issues of data-centric,centralized,isolated solutions,we propose a novel Focusing Service Mechanism,which is capable of scheduling and allocating for optimum utilization of multiple resources,to dynamically generate collaborative and on-demand disaster information services.We also demonstrate the design and implementation of the Integrated Disaster Information Service System(IDISS).Through the service strategies of Virtualizing,Wrapping,and Integrating,disasterrelated resources are constructed into services in the IDISS.These services are dynamically aggregated into focusing service chains,for diverse disaster management tasks.Actual applications illustrate that the proposed service system can significantly improve the capability of disaster management in China.展开更多
基金Project(60573169) supported by the National Natural Science Foundation of China
文摘Based on the methods of acquaintance cache and group-based intelligent forwarding of service recommendations,a novel group-based active service(GAS) protocol for migrating workflows was proposed.This protocol did not require service requesters to discover services or resources.The semantic acquaintance knowledge representation was exploited to describe service groups and this semantic information was used to recommend service to respective clients.The experimental results show that the new protocol proposed offers better performance than other protocols in terms of first-response-time,success-scope and ratio of success-packet-number to total-packet-number.When the number of service request packet is 20,the first-response-time of GAS protocol is only 5.1 s,which is significantly lower than that of other protocols.The success-scope of GAS protocol is 49.1%,showing that GAS protocol can effectively improve the reliability of mobile transactions.And the ratio of success-packet-number to total-packet-number of GAS protocol is up to 0.080,which is obviously higher than that of other protocols.
基金supported by the National Key Research and Development Program(No.2016YFB0800302)
文摘With the development of the Internet of Things(Io T), people's lives have become increasingly convenient. It is desirable for smart home(SH) systems to integrate and leverage the enormous information available from IoT. Information can be analyzed to learn user intentions and automatically provide the appropriate services. However, existing service recommendation models typically do not consider the services that are unavailable in a user's living environment. In order to address this problem, we propose a series of semantic models for SH devices. These semantic models can be used to infer user intentions. Based on the models, we proposed a service recommendation probability model and an alternative-service recommending algorithm. The algorithm is devoted to providing appropriate alternative services when the desired service is unavailable. The algorithm has been implemented and achieves accuracy higher than traditional Hidden Markov Model(HMM). The maximum accuracy achieved is 68.3%.
文摘The elderly are the main objects of college students’volunteer service activities.At present,there are various forms of college students’volunteer service activities,which are highly valued by colleges and universities and popular among college students.In order to further improve the mental health of the elderly,it could be achieved through paths like strengthening volunteering cooperation with aged services agencies,implementing the volunteer service mechanism of“one person-one file,one person-one policy”for the elderly,establishing a mental health mentor system for volunteer service activities,improving the mental health knowledge level of college student volunteers,carrying out a series of voluntary service activities with the theme of mental health,attaching importance on cultivating the positive and optimistic attitude of the elderly in volunteer service activities,and launching volunteer service activities to enrich the spiritual and cultural life of the elderly.
基金Supported by Science Research Item of Hubei Environmental Protection Agency,China(2013HB03)
文摘According to the latest research of ecosystem service（ ES）,the background and connotation of ecosystem services were briefly summarized,the relationship among human activity,climate change,and biodiversity and ecosystem service function（ ESF） was synthetically analyzed,the research trends of ecosystem services function assessment（ ESFA） were discussed from multi-scale,and the perspectives was given based on the past studies. The ecological long-term location monitoring method based on the ESFA should be studied,evaluation index of ESFA should be further improved,and the ESF research on the arid region should be reinforced.
基金support from the National Natural Science Foundation of China (No.72341014).
文摘Cross-border e-commerce(CBEC)significantly stimulates foreign trade development and the flow of goods and services.This study,using Chinese city-level data and a multiperiod difference-in-differences model based on CBEC comprehensive pilot zones,explores the impact of CBEC reform on urban service industry entrepreneurship.The results show that CBEC reform increased entrepreneurial activity,and this is confirmed by robustness tests.The mechanisms driving this efect include the attraction of foreign direct investment,improved information infrastructure,and talent development.Regional analysis reveals stronger effects in central,western,and noncoastal cities,and industry analysis highlights public and consumer services.Spatial heterogeneity shows that the reform's impact diminished with distance from pilot zones,with potential inhibitory efects in remote areas.This study demonstrates how CBEC reform can stimulate entrepreneurship and foster economicgrowth.
文摘A network communication and recording system based on China-made ARCA SOC and embedded Linux operating system is introduced in this paper. It supports TCP/IP network communication protocol and mass storage medium. It has strong points of self-monitor, low power consumption, high timing accuracy, high reliability of operation, etc. It can serve up to 20 centers real-time waveform data at the same time. It meets not only the requirements of physical networking observation, but also virtual networking observation based on Internet in which real-time data transmission is required. Its ability of field recording also meets the requirements of portable seismic observation, strong motion observation and seismic exploration observation, etc.
基金This study was supported by the National Science and Technology Support Program of China[863 Program,grant number 03-Y30B06-9001-13/15,grant number 2012AA121305]the National Natural Science Foundation[grant number 41171311,grant number 41101354,grant number 41201440].
文摘The Chinese Government and citizens face enormous challenges of disaster management as widespread devastation,economic damages,and loss of human lives caused by increasing natural disasters.Disaster management requires a complicated iterative process that includes disaster monitoring,early detection,forecasting,loss assessment,and efficient analysis of disaster reduction.Each task typically involves the use of technologists and multiple geospatial information resources,including sensors,data sources,models,geo-tools,software packages,and computing resources.However,most existing disaster management systems operate in a typical passive data-centric mode,where resources cannot be fully utilized.This impediment is partially being addressed by the increasingly complex application requirements and the growing availability of diverse resources.In this paper,we summarize and analyze the practical problems experienced by the National Disaster Reduction Application System of China.To address the issues of data-centric,centralized,isolated solutions,we propose a novel Focusing Service Mechanism,which is capable of scheduling and allocating for optimum utilization of multiple resources,to dynamically generate collaborative and on-demand disaster information services.We also demonstrate the design and implementation of the Integrated Disaster Information Service System(IDISS).Through the service strategies of Virtualizing,Wrapping,and Integrating,disasterrelated resources are constructed into services in the IDISS.These services are dynamically aggregated into focusing service chains,for diverse disaster management tasks.Actual applications illustrate that the proposed service system can significantly improve the capability of disaster management in China.
