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作者 继平 《时代风采》 2006年第3期48-48,共1页
关键词 《搬家》 中国 当代 散文 继平
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A stochastic user equilibrium model solving overlapping path and perfectly rational issues 被引量:1
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作者 YAN Dong-mei GUO Jian-hua 《Journal of Central South University》 SCIE EI CAS CSCD 2021年第5期1584-1600,共17页
Traffic assignment has been recognized as one of the key technologies in supporting transportation planning and operations.To better address the perfectly rational issue of the expected utility theory(EUT)and the over... Traffic assignment has been recognized as one of the key technologies in supporting transportation planning and operations.To better address the perfectly rational issue of the expected utility theory(EUT)and the overlapping path issue of the multinomial logit(MNL)model that are involved in the traffic assignment process,this paper proposes a cumulative prospect value(CPV)-based generalized nested logit(GNL)stochastic user equilibrium(SUE)model.The proposed model uses CPV to replace the utility value as the path performance within the GNL model framework.An equivalent mathematical model is provided for the proposed CPV-based GNL SUE model,which is solved by the method of successive averages(MSA).The existence and equivalence of the solution are also proved for the equivalent model.To demonstrate the performance of the proposed CPV-based GNL SUE model,three road networks are selected in the empirical test.The results show that the proposed model can jointly deal with the perfectly rational issue and the overlapping path issue,and additionally,the proposed model is shown to be applicable for large road networks. 展开更多
关键词 stochastic user equilibrium cumulative prospect theory generalized nested logit method of successive averages
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Generalized nested logit-based stochasticuser equilibrium model with distance constraint of electric vehicles
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作者 Yan Dongmei Guo Jianhua Park B.Brian 《Journal of Southeast University(English Edition)》 EI CAS 2022年第2期186-194,共9页
Considering the range anxiety issue caused by the limited driving range and the scarcity of battery charging stations,the conventional multinomial logit(MNL)model with the overlapping path issue was used in route choi... Considering the range anxiety issue caused by the limited driving range and the scarcity of battery charging stations,the conventional multinomial logit(MNL)model with the overlapping path issue was used in route choice modeling to describe the route choice behavior of travelers effectively.Furthermore,the generalized nested logit-based stochastic user equilibrium(GNL-SUE)model with the constraints of multiple user classes and distance limits was proposed.A mathematical model was developed and solved by the method of successive averages.The mathematical model was proven to be analytically equivalent to the modified GNL-SUE model,and the uniqueness of the solution was also confirmed.The proposed mathematical model was tested and compared with the GNL-SUE model without a distance limit and the MNL-SUE model with a distance limit.Results show that the proposed mathematical model can effectively handle the range anxiety and overlapping path challenges. 展开更多
关键词 traffic engineering stochastic user equilibrium generalized nested logit multinomial logit method of successive averages distance limit
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Average Level Crossing Rate and Fading Duration of Multiuser Single Relay Cooperation Wireless Uplinks
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作者 贾向东 杨龙祥 朱洪波 《China Communications》 SCIE CSCD 2013年第4期135-143,共9页
We investigate the average Level Crossing Rate (LCR) and Average Fading Duration (AFD) of multiuser single relay co- operation wireless uplinks over independent and non-identically distributed (i.ni.d) Ray- leig... We investigate the average Level Crossing Rate (LCR) and Average Fading Duration (AFD) of multiuser single relay co- operation wireless uplinks over independent and non-identically distributed (i.ni.d) Ray- leigh fading channels. We first present the statistical analyses of the first-hop equivalent envelope. Then, we investigate the LCR and AFD of an equivalent end-to-end envelope, and present the closed-form solutions to LCR and AFD, which are given with integral forms. Finally, we derive the Laplace approximations of LCR and AFD as well as the upper and lower bounds. The numerical results of LCR show that the upper bound is tight. For multi user systems with different number of mobile users, the analyses indicate that the LCRs are approximately the same at the low level of the envelope. envelope However, there are at the high level of the reasonable differences among the curves of LCRs. Due to that fact that AFD is the inverse function of LCR, the results for AFD are the opposite. 展开更多
关键词 wireless communications multiuseruplinks level crossing rate average fadingduration
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Balanced energy-efficient relay selection scheme in wireless mobile relay networks 被引量:1
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作者 Liu Wei Ji Hong Li Xi 《High Technology Letters》 EI CAS 2010年第3期235-240,共6页
In order to resolve the relay selection problem in wireless mobile relay networks (WMRNs), a novel balanced energy-efficient mobile relay selection scheme is proposed in this paper. Compared with traditional counter... In order to resolve the relay selection problem in wireless mobile relay networks (WMRNs), a novel balanced energy-efficient mobile relay selection scheme is proposed in this paper. Compared with traditional counter-based algorithm, distance and energy consumption are considered from network respect to provide a better network lifetime performance in the proposed scheme. Also, it performs well when nodes move freely at high speed. A random assessment delay (RAD) mechanism is added to avoid collisions and improve transmission efficiency. Simulation results reveal that, the proposed scheme has advantages in prolonging network lifetime, balancing energy compared with existing counter-based scheme. consumption and reducing the total energy consumption 展开更多
关键词 RELAY network lifetime ENERGY-EFFICIENT wireless mobile relay network (WMRN) random assessment delay(RAD)
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2013 Curriculum Reflected in an International Oriented Senior High School, Yogyakarta
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作者 Noor Chairani 《Sino-US English Teaching》 2015年第8期568-574,共7页
Curriculum is one of important factors which contribute to improving learner's ability and potency in education. Curriculum used in school has a purpose to make learners be active and creative persons. It is an educa... Curriculum is one of important factors which contribute to improving learner's ability and potency in education. Curriculum used in school has a purpose to make learners be active and creative persons. It is an education plan that emphasizes the competency of learners. Indonesia, through its Ministry of Education, implements 2013 Curriculum officially that reflects the competency of learners. This curriculum is actually similar with competence-based curriculum which concentrates on learners. In senior high school level, English becomes one of the subjects of final national examination and also this is the last level for learners before they continue their study to university. International oriented school is a school that applies English as a second language and also a school cooperates with or uses international standard curriculum. Reflecting learning and teaching English in senior high school especially in the international oriented school is very important and needs special attention. This research investigates the implementation of curriculum in the international oriented senior high school in Yogyakarta. From the research, it is known that the school officially does not implement 2013 Curriculum. However, ACT (Assessment Certificate Test) curriculum and the values of the school automatically reflect the 2013 Curriculum because the school empowering implementation of competency-based curriculum in learning process that focuses on learner-centered learning, facilitating assessments of process of learning and fostering learners' autonomy through the curriculum is reflected in the school essentially in the programs and activities. 展开更多
关键词 senior high school international oriented school 2013 Curriculum
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Secrecy rate analysis of dual-hop AF relay wiretap channel
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作者 丁飞 Song Aiguo +1 位作者 Li Jianqing Wu Zhenyang 《High Technology Letters》 EI CAS 2014年第4期390-394,共5页
An amplify-and-forward(AF) dual-hop relay is proposed for secure communication within Wyner s wiretap channel.Based on an information-theoretic formulation,the average secrecy rate is characterized when two legitimate... An amplify-and-forward(AF) dual-hop relay is proposed for secure communication within Wyner s wiretap channel.Based on an information-theoretic formulation,the average secrecy rate is characterized when two legitimate partners communicate over a quasi-static fading channel.Theoretical analysis and simulation results show that both cooperative strategies of average power scaling(APS) and instantaneous power scaling(IPS) are proved to be able to achieve information-theoretic security,and eavesdropper is unable to decode any information. 展开更多
关键词 secrecy rate information-theoretic security amplify-and-forward (AF) dual-hop RELAY wiretap channel
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Relay camera videometrics based conversion method for unstable platform to static reference 被引量:4
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作者 YU QiFeng SUN XiangYi +4 位作者 JIANG GuangWen LIU XiaoLin ZHANG XiaoHu ZHOU Jian SHANG Yang 《Science China(Technological Sciences)》 SCIE EI CAS 2011年第4期1017-1023,共7页
This article proposes a relay camera videometrics based method to convert an unstable measuring platform to a static reference to solve the problems of large error or invalidation caused by measuring platform instabil... This article proposes a relay camera videometrics based method to convert an unstable measuring platform to a static reference to solve the problems of large error or invalidation caused by measuring platform instability in photogrammetric and videometric measurements.The method installs a relay camera on the unstable platform and captures images of a reference marker fixed on a static reference or vice versa to resolve the 3D movement of the unstable platform relative to the static reference,based on which it corrects the error of the measured results and thus eliminating the influence of the platform movement.It finds new and important applications for videometrics by making high-precision dynamic measurement possible on unstable platforms.Verification experiments and numerical simulations have proven its validity and practicability. 展开更多
关键词 optical measurement VIDEOMETRICS unstable platform static reference conversion
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