期刊文献+
共找到5篇文章
< 1 >
每页显示 20 50 100
A Game Theoretic Approach for Inter-Network Interference Mitigation in Wireless Body Area Networks 被引量:1
1
作者 Du Dakun Hu Fengye +3 位作者 Wang Feng Wang Zhijun Du Yu Wang Lu 《China Communications》 SCIE CSCD 2015年第9期150-161,共12页
Wireless Body Area Network(WBAN) is an emerging technology to provide real-time health monitoring and ubiquitous healthcare services. In many applications, multiple wireless body area networks have to coexist in a sma... Wireless Body Area Network(WBAN) is an emerging technology to provide real-time health monitoring and ubiquitous healthcare services. In many applications, multiple wireless body area networks have to coexist in a small area, resulting in serious inter-network interference. This not only reduces network reliability that is especially important in emergency medical applications, but also consumes more power of WBANs. In this paper, an inter-network interference mitigation approach based on a power control algorithm is proposed. Power control is modeled as a non-cooperative game, in which both inter-network interference and energy efficiency of WBANs are considered. The existence and uniqueness of Nash Equilibrium in the game are proved, and an optimal scheme based on best response is proposed to find its Nash Equilibrium. By coordinating the transmission power levels among networks under interference environment, the total system throughput can be increased with minimum power consumed. The effectiveness of the proposed method has been illustrated by simulation results, where the performance of the proposed approach is evaluated in terms of overall utility and power efficiency and convergence speed. 展开更多
关键词 wireless body area network power control inter-network interference game theory
下载PDF
NUMERICAL STUDY ON THE FLOW AROUND A CIRCULAR CYLINDER WITH SURFACE SUCTION OR BLOWING USING VORTICITY-VELOCITY METHOD 被引量:2
2
作者 LING Guo-ping(凌国平) +1 位作者 FANG Jian-wen(方健雯) 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 2002年第9期1089-1096,共8页
A vorticity-velocity method was used to study the incompressible viscous fluid flow around a circular cylinder with surface suction or blowing. The resulted high order implicit difference equations were effeciently so... A vorticity-velocity method was used to study the incompressible viscous fluid flow around a circular cylinder with surface suction or blowing. The resulted high order implicit difference equations were effeciently solved by the modified incomplete LU decomposition conjugate gradient scheme ( MILU-CG). The effects of surface suction or blowing' s position and strength on the vortex structures in the cylinder wake, as well as on the drag and lift forces at Reynoldes number Re = 100 were investigated numerically. The results show that the suction on the shoulder of the cylinder or the blowing on the rear of the cylinder can effeciently suppress the asymmetry of the vortex wake in the transverse direction and greatly reduce the lift force; the suction on the shoulder of the cylinder, when its strength is properly chosen, can reduce the drag force significantly, too. 展开更多
关键词 circular cylinder with surface suction or blowing separated vortex flow around bluff body and its control vorticity-velocity method preconditioned conjugate gradient method
下载PDF
From the new Austrian tunneling method to the geoengineering condition evaluation and dynamic controlling method 被引量:1
3
作者 Yanjun Shang Kun Li +1 位作者 Wantong He Chunbo Sheng 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2014年第4期366-372,共7页
The new Austrian tunneling method (NATM) is widely applied in design and construction of underground engineering projects. When the type and distribution of unfavorable geological bodies (UGBs) associated with the... The new Austrian tunneling method (NATM) is widely applied in design and construction of underground engineering projects. When the type and distribution of unfavorable geological bodies (UGBs) associated with their influences on geoengineering are complicated or unfortunately are overlooked, we should pay more attentions to internal features of rocks grades IV and V (even in local but mostly controlling zones). With increasing attentions to the characteristics, mechanism and influences of engineering construction-triggered geohazards, it is crucial to fully understand the disturbance of these geohazards on project construction. A reasonable determination method in construction procedure, i.e. the shape of working face, the type of engineering support and the choice of feasible procedure, should be considered in order to mitigate the construction-triggered geohazards. Due to their high sensitivity to groundwater and in-situ stress, various UGBs exhibit hysteretic nature and failure modes. To give a complete understanding on the internal causes, the emphasis on advanced comprehensive geological forecasting and overall reinforcement treatment is therefore of more practical significance. Compre- hensive evaluation of influential factors, identification of UGB, and measures of discontinuity dynamic controlling comprises the geoengineering condition evaluation and dynamic controlling method. In a case of a cut slope, the variations of UGBs and the impacts of key environmental factors are presented, where more severe construction-triggered geohazards emerged in construction stage than those predicted in design and field investigation stages. As a result, the weight ratios of different influential factors with respect to field investigation, design and construction are obtained. 展开更多
关键词 Unfavorable geological body (UGB)Multi-factor interaction matrix Discontinuity dynamic controlling (DDC)Cut slope Geoengineering condition evaluation and dynamic controlling (GEDC) method
下载PDF
Comparative effects of artemisia vulgaris and charcoal moxa stimulating Zhongwan(CV 12) on body temperature in healthy participants:a cross-over single-blind randomized study
4
作者 Ho-Yeon Go Ju Ah Lee +9 位作者 Sunyoung Park Sunju Park Jeong-Su Park Chunhoo Cheon Seong-Gyu Ko Kyung-Hwan Kong Chan-yong Jun Jong-hyeong Park Mi-Ran Shin Se-Hoon Lee 《Journal of Traditional Chinese Medicine》 SCIE CAS CSCD 2015年第5期551-557,共7页
OBJECTIVE:To evaluate the efficacy,safety,satisfaction,discomfort and patient preference of moxa cones of artemisia vulgaris and charcoal moxa.METHODS:This comparative study of moxibustion treatment with Artemisia vul... OBJECTIVE:To evaluate the efficacy,safety,satisfaction,discomfort and patient preference of moxa cones of artemisia vulgaris and charcoal moxa.METHODS:This comparative study of moxibustion treatment with Artemisia vulgaris and charcoal moxa cone stimulating Zhongwan(CV 12) is a cross-over single-blinded,randomized clinical trial.A total of 40 healthy subjects(24 males and 16females) participated in this study.Two subjects dropped out of the trial.Thirty-eight subjects were treated with Artemisia vulgaris and charcoal moxa cones for 30 min in a cross-over design.After treatment,the patients underwent a 30 minute waiting period,and then the temperatures at Tanzhong(CV 17),Zhongwan(CV 12) and Guanyuan(CV 4) were measured using digital infrared thermal imaging.RESULTS:After the use of Artemisia vulgaris moxa,the patients' body temperatures were slightly lowered at Tanzhong(CV 17),Zhongwan(CV 12)and Guanyuan(CV 4),but the changes were not statistically significant.After the use of charcoal moxa,the patients' body temperatures were somewhat increased at Zhongwan(CV 12) and Guanyuan(CV 4),but the changes were not statistically significant.After Artemisia vulgaris moxa use,the body temperature difference between Zhongwan(CV 12) and Guanyuan(CV 4)was significantly increased.After charcoal moxa use,the body temperature difference between Tanzhong(CV 17) and Zhongwan(CV 12) was significantly decreased in males and in the whole group.This change was caused by the difference in the moxibustion type and by gender differences.CONCLUSION:This pilot study found that moxibustion did not raise the body temperature,but temperature differences between acupoints were affected.Further large-scale randomized controlled trials are needed for the effect of moxibustion on body temperature. 展开更多
关键词 Moxibustion Point CV12(Zhongwan) Artemisia body temperature Cross-over studies Single-blind method Randomized controlled trial
原文传递
Plate Shape Control Theory and Experiment for 20-high Mill 被引量:5
5
作者 Zheng-wen YUAN Hong XIAO 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2015年第11期996-1001,共6页
Roll flattening theory is an important part of plate shape control theories for 20-high mill. In order to improve the accuracy of roll flattening calculation for 20-high mill, a new and more accurate roll flattening m... Roll flattening theory is an important part of plate shape control theories for 20-high mill. In order to improve the accuracy of roll flattening calculation for 20-high mill, a new and more accurate roll flattening model was proposed. In this model, the roll barrel was considered as a finite length semi-infinite body. Based on the boundary integral equation method, the numerical solution of the finite length semi-infinite body under the distributed force was obtained and an accurate roll flattening model was established. Coupled with roll bending model and strip plastic deformation, a new and more accurate plate control model for 20-high mill was established. Moreover, the effects of the first intermediate roll taper angle and taper length were analyzed. The tension distribution calculated by analytical model was consistent with the experimental results. 展开更多
关键词 20-high mill roll flattening finite length semi-infinite body boundary integral equation method plate shape control
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部