The asteroid exploration opportunities are searched and calculated with launch dates in 2006 to2010, and with asteroid Ivar 1627 as the target, the spacecraft and its subsystems are designed and analyzed,and the trans...The asteroid exploration opportunities are searched and calculated with launch dates in 2006 to2010, and with asteroid Ivar 1627 as the target, the spacecraft and its subsystems are designed and analyzed,and the transfer trajectory is designed using △VEGA technology for the asteroid rendezvous. The design resultssatisfied the energy requirements for small explorers.展开更多
At present, the aging situation of China＇s population is becoming more and more serious. By the end of 2016, there were 231 million people over the age of 60 in China, accounting for 16.7% of the total population. Ab...At present, the aging situation of China＇s population is becoming more and more serious. By the end of 2016, there were 231 million people over the age of 60 in China, accounting for 16.7% of the total population. About 150 million people aged 65 and over make up 10.8 percent of the total population. China is expected to enter the peak period of population aging by 2035. Therefore, the government as a single pension service main body management pattern already can not adapt to our country entered the aging society, mobilize and fostering social organizations to participate in the pension services is to build perfect endowment service system, satisfy people pension service demand model of a kind of indispensable. In view of the development of social organizations has just started in our country, there exist many problems and difficulties, so this article USES the ISM method, for social organizations to participate in research and analyze influence factors of pension services, and then find out the social organization in the process of participation in pension service problems, put forward effective solutions.展开更多
Despite that existing data sharing systems in online social networks （OSNs） propose to encrypt data before sharing, the multiparty access control of encrypted data has become a challenging issue. In this paper, we p...Despite that existing data sharing systems in online social networks （OSNs） propose to encrypt data before sharing, the multiparty access control of encrypted data has become a challenging issue. In this paper, we propose a secure data sharing scheme in 0SNs based on ciphertext-policy attribute- based proxy re-encryption and secret sharing. In order to protect users＇ sensitive data, our scheme allows users to customize access policies of their data and then outsource encrypted data to the OSNs service provider. Our scheme presents a multiparty access control model, which enables the disseminator to update the access policy of ciphertext if their attributes satisfy the existing access policy. Further, we present a partial decryption construction in which the computation overhead of user is largely reduced by delegating most of the decryption operations to the OSNs service provider. We also provide checkability on the results returned from the OSNs service provider to guarantee the correctness of partial decrypted ciphertext. Moreover, our scheme presents an efficient attribute revocation method that achieves both forward and backward secrecy. The security and performance analysis results indicate that the proposed scheme is secure and efficient in OSNs.展开更多
Abstract： This study discusses the benefits of establishing a broader discipline of water science, based on the organizing mechanism of PES-W （payments for ecosystem services on the watershed scale）. PES-W is deriv...Abstract： This study discusses the benefits of establishing a broader discipline of water science, based on the organizing mechanism of PES-W （payments for ecosystem services on the watershed scale）. PES-W is derived from an extension of governance analyses of 163 watershed-based PES （payments for ecosystem services） programs, and from the integrative decision mechanism of IPES （integrated payments for ecosystem services） to generalize the PES approach. PES-W reflects three interrelated perspectives fundamental to the global science of integrated water governance： （1） the ecological and economic perspective to integrate human incentives for integrated water resources governance; （2） the sociological and ecological perspective to form partnerships for meta-monitoring and recta-funding for integrated watershed governance; and （3） the scientific and sociological perspective to develop organizing botmdaries based on technology, lifestyle, entrepreneurship and organizing infrastructure for integrated aquatic ecosystem governance. This study is intended to communicate with the international scientific communities for establishing an advanced, academic, and practical multidisciplinary field of the global science of integrated water governance as a critical condition for sustainable development in human societies.展开更多
As enterprises expand globally, the social value of their operations is assessed on the full range of their contribution to society. Enterprises must be profitable to succeed, but they also should strategically align ...As enterprises expand globally, the social value of their operations is assessed on the full range of their contribution to society. Enterprises must be profitable to succeed, but they also should strategically align their operations so far as feasible and sustainable in order to address related social needs. This alignment includes not only the beneficial design and quality of goods and services an enterprise produces, but also enhancing the beneficial effects that its full range of business processes, systems, and practices have on society. A comprehensive enterprise corporate social responsibility （CSR） audit is based on two comprehensive social systems models---one of society as a whole and another of the corporate organization. By juxtaposing these two models--which are mirror images of each other--an enterprise can identify various points where its activities intersect with relevant social needs and can configure its operations so far as feasible to alleviate pressing social issues. Using a comparative cost-benefit analysis, the enterprise determines which systems, processes, and activities need to configure or adapt in order to better address the societal needs that are most critical for its success. They may require the enterprise to re-design products or services, develop new activities or desist in others, or reconfigure processes or systems. Thus, enterprises must decide which options are most feasible in light of the societal benefit they are likely to produce. As creatures of society, enterprises have much to gain by strengthening civil society and addressing its most pressing needs whenever possible within the limits of its commercial mission. What action to take depends upon the firm＇s cost-benefit analysis.展开更多
Accounting profession has, in recent times, been regulated mainly by the private accounting standard setters mainly the International Accounting Standards Board （IASB）, which has taken a center stage and redefined t...Accounting profession has, in recent times, been regulated mainly by the private accounting standard setters mainly the International Accounting Standards Board （IASB）, which has taken a center stage and redefined the accounting information systems beyond the knowledge discernment of the average users and stakeholders. Public accounting profession＇s overreliance on the ever-changing IASB conceptual frameworks and their subsequent publications International Financial Reporting Standards （IFRS） standards has strongly compromised the ethics and objectivity of the profession, especially the accounting fundamental qualitative characteristics of the fair representation. Public accountants are, by ethics, required to issue an accurate, independent, and objective opinion of the financial state of the reporting entity. A review of various literatures from the IASB and the related bodies including independent auditors was employed during the evaluation process so as to minimize bias and evaluate objectively. The results revealed that currently, the IASB conceptual frameworks and IFRS contain inconsistent and opposing objectives including an inconclusive definition of elements and measurement basis mainly of profit and loss transactions and other comprehensive income, and hence the public accounting profession has been ethically challenged and compromised. Financial reporting is now premised on estimates, judgments, and models as opposed to a definitive measurement in accounting. A recommendation of further study on the IASB fundamental qualitative characteristics of decision usefulness should be pursued objectively.展开更多
Service-Oriented Communication(SOC)is a key research issue to enable media communications using the Service-Oriented Architecture(SOA).Motivated by the necessity to guarantee the service quality of our webbased multim...Service-Oriented Communication(SOC)is a key research issue to enable media communications using the Service-Oriented Architecture(SOA).Motivated by the necessity to guarantee the service quality of our webbased multimedia conferencing system,we present a Comprehensively Context-Aware(CoCA)approach in this paper.One major problem in the existing end-to-end Quality of Service(QoS)management solutions is that they analyse and exploit the relationships between the QoS metrics and corresponding contexts in an isolated manner.In this paper,we propose a novel approach to leveraging such relationships in a comprehensive manner based on Bayesian networks and the fuzzy set theory.This approach includes three phases:1)information feedback and training,2)QoS-to-context mapping,and3)optimal context adaption.We implement the proposed CoCA in the real multimedia conferencing system and compare its performance with the existing bandwidth aware and playback buffer aware schemes.Experimental results show that the proposed CoCA outperforms the competing approaches in improving the average video Peak Signal-to-Noise Ratio(PSNR).It also exhibits good performance in preventing the playback buffer starvation.展开更多
文摘The asteroid exploration opportunities are searched and calculated with launch dates in 2006 to2010, and with asteroid Ivar 1627 as the target, the spacecraft and its subsystems are designed and analyzed,and the transfer trajectory is designed using △VEGA technology for the asteroid rendezvous. The design resultssatisfied the energy requirements for small explorers.
文摘At present, the aging situation of China＇s population is becoming more and more serious. By the end of 2016, there were 231 million people over the age of 60 in China, accounting for 16.7% of the total population. About 150 million people aged 65 and over make up 10.8 percent of the total population. China is expected to enter the peak period of population aging by 2035. Therefore, the government as a single pension service main body management pattern already can not adapt to our country entered the aging society, mobilize and fostering social organizations to participate in the pension services is to build perfect endowment service system, satisfy people pension service demand model of a kind of indispensable. In view of the development of social organizations has just started in our country, there exist many problems and difficulties, so this article USES the ISM method, for social organizations to participate in research and analyze influence factors of pension services, and then find out the social organization in the process of participation in pension service problems, put forward effective solutions.
基金This work has been supported by the National Natural Science Foundation of China under Grant No.61272519,the Specialized Research Fund for the Doctoral Program of Higher Education under Grant No.20120005110017,and the National Key Technology R&D Program under Grant No.2012BAH06B02
文摘Despite that existing data sharing systems in online social networks （OSNs） propose to encrypt data before sharing, the multiparty access control of encrypted data has become a challenging issue. In this paper, we propose a secure data sharing scheme in 0SNs based on ciphertext-policy attribute- based proxy re-encryption and secret sharing. In order to protect users＇ sensitive data, our scheme allows users to customize access policies of their data and then outsource encrypted data to the OSNs service provider. Our scheme presents a multiparty access control model, which enables the disseminator to update the access policy of ciphertext if their attributes satisfy the existing access policy. Further, we present a partial decryption construction in which the computation overhead of user is largely reduced by delegating most of the decryption operations to the OSNs service provider. We also provide checkability on the results returned from the OSNs service provider to guarantee the correctness of partial decrypted ciphertext. Moreover, our scheme presents an efficient attribute revocation method that achieves both forward and backward secrecy. The security and performance analysis results indicate that the proposed scheme is secure and efficient in OSNs.
文摘Abstract： This study discusses the benefits of establishing a broader discipline of water science, based on the organizing mechanism of PES-W （payments for ecosystem services on the watershed scale）. PES-W is derived from an extension of governance analyses of 163 watershed-based PES （payments for ecosystem services） programs, and from the integrative decision mechanism of IPES （integrated payments for ecosystem services） to generalize the PES approach. PES-W reflects three interrelated perspectives fundamental to the global science of integrated water governance： （1） the ecological and economic perspective to integrate human incentives for integrated water resources governance; （2） the sociological and ecological perspective to form partnerships for meta-monitoring and recta-funding for integrated watershed governance; and （3） the scientific and sociological perspective to develop organizing botmdaries based on technology, lifestyle, entrepreneurship and organizing infrastructure for integrated aquatic ecosystem governance. This study is intended to communicate with the international scientific communities for establishing an advanced, academic, and practical multidisciplinary field of the global science of integrated water governance as a critical condition for sustainable development in human societies.
文摘As enterprises expand globally, the social value of their operations is assessed on the full range of their contribution to society. Enterprises must be profitable to succeed, but they also should strategically align their operations so far as feasible and sustainable in order to address related social needs. This alignment includes not only the beneficial design and quality of goods and services an enterprise produces, but also enhancing the beneficial effects that its full range of business processes, systems, and practices have on society. A comprehensive enterprise corporate social responsibility （CSR） audit is based on two comprehensive social systems models---one of society as a whole and another of the corporate organization. By juxtaposing these two models--which are mirror images of each other--an enterprise can identify various points where its activities intersect with relevant social needs and can configure its operations so far as feasible to alleviate pressing social issues. Using a comparative cost-benefit analysis, the enterprise determines which systems, processes, and activities need to configure or adapt in order to better address the societal needs that are most critical for its success. They may require the enterprise to re-design products or services, develop new activities or desist in others, or reconfigure processes or systems. Thus, enterprises must decide which options are most feasible in light of the societal benefit they are likely to produce. As creatures of society, enterprises have much to gain by strengthening civil society and addressing its most pressing needs whenever possible within the limits of its commercial mission. What action to take depends upon the firm＇s cost-benefit analysis.
文摘Accounting profession has, in recent times, been regulated mainly by the private accounting standard setters mainly the International Accounting Standards Board （IASB）, which has taken a center stage and redefined the accounting information systems beyond the knowledge discernment of the average users and stakeholders. Public accounting profession＇s overreliance on the ever-changing IASB conceptual frameworks and their subsequent publications International Financial Reporting Standards （IFRS） standards has strongly compromised the ethics and objectivity of the profession, especially the accounting fundamental qualitative characteristics of the fair representation. Public accountants are, by ethics, required to issue an accurate, independent, and objective opinion of the financial state of the reporting entity. A review of various literatures from the IASB and the related bodies including independent auditors was employed during the evaluation process so as to minimize bias and evaluate objectively. The results revealed that currently, the IASB conceptual frameworks and IFRS contain inconsistent and opposing objectives including an inconclusive definition of elements and measurement basis mainly of profit and loss transactions and other comprehensive income, and hence the public accounting profession has been ethically challenged and compromised. Financial reporting is now premised on estimates, judgments, and models as opposed to a definitive measurement in accounting. A recommendation of further study on the IASB fundamental qualitative characteristics of decision usefulness should be pursued objectively.
基金supported by the NationalBasic Research Program of China(973 Program)under Grants No.2011CB302506,No.2011CB302704,No.2012CB315802the National Key Technologies Research and Development Program of China"Research on theMobile Community Cultural Service Aggregation Supporting Technology"under Grant No.2012BAH94F02+5 种基金the Novel Mobile ServiceControl Network Architecture and Key Technologies under Grant No.2010ZX03004001-01the National High Technical Researchand Development Program of China(863 Program)under Grant No.2013AA102301the National Natural Science Foundation of Chinaunder Grants No.61003067,No.61171102,No.61001118,No.61132001Program for NewCentury Excellent Talents in University underGrant No.NCET-11-0592the Project of NewGeneration Broadband Wireless Network under Grant No.2011ZX03002-002-01the Beijing Nova Program under Grant No.2008B50
文摘Service-Oriented Communication(SOC)is a key research issue to enable media communications using the Service-Oriented Architecture(SOA).Motivated by the necessity to guarantee the service quality of our webbased multimedia conferencing system,we present a Comprehensively Context-Aware(CoCA)approach in this paper.One major problem in the existing end-to-end Quality of Service(QoS)management solutions is that they analyse and exploit the relationships between the QoS metrics and corresponding contexts in an isolated manner.In this paper,we propose a novel approach to leveraging such relationships in a comprehensive manner based on Bayesian networks and the fuzzy set theory.This approach includes three phases:1)information feedback and training,2)QoS-to-context mapping,and3)optimal context adaption.We implement the proposed CoCA in the real multimedia conferencing system and compare its performance with the existing bandwidth aware and playback buffer aware schemes.Experimental results show that the proposed CoCA outperforms the competing approaches in improving the average video Peak Signal-to-Noise Ratio(PSNR).It also exhibits good performance in preventing the playback buffer starvation.
