Within a wireless opportunistic network,one of the lucky users gets an opportunity to utilize thewhole radio resource.However some of the unlucky users keep silent during an unexpected period result-ing from severe wi...Within a wireless opportunistic network,one of the lucky users gets an opportunity to utilize thewhole radio resource.However some of the unlucky users keep silent during an unexpected period result-ing from severe wireless environment and imperfect scheduling algorithms .An opportunistic cooperationprotocol is proposed that can achieve equivalent performance measured in terms of outage probability,inwhich scheme the opportunistic user helps to relay what need retransmitting indicated by the destinationand selects the appropriate power allocation to pursue fairness.The proposed scheme deploys superposi-tion coding and successive interference cancellation at relay and destination,respectively .To improve thespectral efficiency,the modified cooperation architecture involves two opportunistic users which work inturn.The simulation results demonstrate that the protocol obtains better performance compared with theconventional methods.展开更多
To evaluate the effects of Crumb Rubber Modifiers (CRMS) on basic engineering properties (i.e. Marshall, tensile strength, and compressive strength) of stone matrix asphalt mixtures, the ASTM testing and procedures we...To evaluate the effects of Crumb Rubber Modifiers (CRMS) on basic engineering properties (i.e. Marshall, tensile strength, and compressive strength) of stone matrix asphalt mixtures, the ASTM testing and procedures were employed. Results of the evaluation were used to quantify the effect of CRM source and CRM content on engineering properties at testing temperatures of 25 ℃ and 60 ℃. Statistical models were developed, which represent the nature of effects on performance-related properties of stone matrix asphalt mixtures.展开更多
The "Chinese Dream" has been the catch-prase and topic of recent days, because it embodies the ardent aspiration of all Chinese people for a beautiful China and better life. General Secretary Xi Jiping elabo...The "Chinese Dream" has been the catch-prase and topic of recent days, because it embodies the ardent aspiration of all Chinese people for a beautiful China and better life. General Secretary Xi Jiping elaborated on the blueprint and goals of the "Chinese Dream" at the closing ceremony of the 1st Session of the 12th NPC, as well as how could we realize this Dream.展开更多
Communities are the basic units as well as cell of the society. Community management and service is of fundamental significance for socia harmony, and also an important part of socia management innovation. Recent years
基金supported by the National Nature Science Foundation of China(No.60674009)the High Technology Research and Development Programme of China(No.2006AA01Z270)
文摘Within a wireless opportunistic network,one of the lucky users gets an opportunity to utilize thewhole radio resource.However some of the unlucky users keep silent during an unexpected period result-ing from severe wireless environment and imperfect scheduling algorithms .An opportunistic cooperationprotocol is proposed that can achieve equivalent performance measured in terms of outage probability,inwhich scheme the opportunistic user helps to relay what need retransmitting indicated by the destinationand selects the appropriate power allocation to pursue fairness.The proposed scheme deploys superposi-tion coding and successive interference cancellation at relay and destination,respectively .To improve thespectral efficiency,the modified cooperation architecture involves two opportunistic users which work inturn.The simulation results demonstrate that the protocol obtains better performance compared with theconventional methods.
文摘To evaluate the effects of Crumb Rubber Modifiers (CRMS) on basic engineering properties (i.e. Marshall, tensile strength, and compressive strength) of stone matrix asphalt mixtures, the ASTM testing and procedures were employed. Results of the evaluation were used to quantify the effect of CRM source and CRM content on engineering properties at testing temperatures of 25 ℃ and 60 ℃. Statistical models were developed, which represent the nature of effects on performance-related properties of stone matrix asphalt mixtures.
文摘The "Chinese Dream" has been the catch-prase and topic of recent days, because it embodies the ardent aspiration of all Chinese people for a beautiful China and better life. General Secretary Xi Jiping elaborated on the blueprint and goals of the "Chinese Dream" at the closing ceremony of the 1st Session of the 12th NPC, as well as how could we realize this Dream.
文摘Communities are the basic units as well as cell of the society. Community management and service is of fundamental significance for socia harmony, and also an important part of socia management innovation. Recent years
