期刊文献+
共找到5篇文章
< 1 >
每页显示 20 50 100
艺海寻踪——赖少其轶事拾缀
1
作者 赖晓峰 雷铎 于在海 《合肥学院学报(社会科学版)》 2005年第4期14-20,共7页
赖少其是当代著名的国画家、版画家、书法家、诗人。作者记叙了赖老解放后为政从艺道路上的轶事。追忆了赖老与黄宾虹、傅抱石、吴湖帆、林风眠、赵朴初等的“血火之谊”;记录了赖老上世纪80年代登天台、上雁荡山、访方介堪先生、游普... 赖少其是当代著名的国画家、版画家、书法家、诗人。作者记叙了赖老解放后为政从艺道路上的轶事。追忆了赖老与黄宾虹、傅抱石、吴湖帆、林风眠、赵朴初等的“血火之谊”;记录了赖老上世纪80年代登天台、上雁荡山、访方介堪先生、游普陀、绍兴怀故人的踪迹;描述了赖老赴美访王己千、观大千画,访巴黎浏览艺术珍品的历程;最后叙述了赖老晚年“丙寅变法”、“衰年变法”,走完人生道路的最后时刻。 展开更多
关键词 赖少其 血火之谊 故地游踪 艺术朝圣 二次“变法”
下载PDF
Cooperative merging control strategy of connected and automated vehicles on highways 被引量:2
2
作者 Xu Linghui Lu Jia +2 位作者 Wang Chong Ran Bin Zhang Jian 《Journal of Southeast University(English Edition)》 EI CAS 2019年第2期220-227,共8页
To improve traffic performance when on-ramp vehicles merge into the mainstream,a collaborative merging control strategy is proposed to determine the merging sequence and trajectory control of vehicles.Merging trajecto... To improve traffic performance when on-ramp vehicles merge into the mainstream,a collaborative merging control strategy is proposed to determine the merging sequence and trajectory control of vehicles.Merging trajectory planning takes the minimization of vehicle acceleration as the optimization objective.Either the variational method or the quadratic programming method is utilized to determine arrival time,optimal time and control variables for each vehicle.As a supplement,the adaptive cruise control(ACC)model is used to calculate each control variable in each time interval on special occasions.Simulation results show that the cooperative merging control strategy outperforms the optimal control strategy.The root mean square(RMS)of acceleration and the root mean square error(RMSE)of time headway are significantly decreased,with the reductions up to 90.1%and 25.2%,respectively.Under the cooperative control strategy,the difference between the average speed and desired speed consistently approaches zero.In addition,few or no collisions occur.To conclude,the proposed strategy favours the improvements in passenger comfort,traffic efficiency,traffic stability and safety around highway on-ramps. 展开更多
关键词 merging trajectory planning optimization problem classical variational method quadratic programming adaptive cruise control(ACC)model
下载PDF
Reliability analysis of earth slopes using hybrid chaotic particle swarm optimization 被引量:7
3
作者 M.Khajehzadeh M.R.Taha A.El-Shafie 《Journal of Central South University》 SCIE EI CAS 2011年第5期1626-1637,共12页
A numerical procedure for reliability analysis of earth slope based on advanced first-order second-moment method is presented,while soil properties and pore water pressure may be considered as random variables.The fac... A numerical procedure for reliability analysis of earth slope based on advanced first-order second-moment method is presented,while soil properties and pore water pressure may be considered as random variables.The factor of safety and performance function is formulated utilizing a new approach of the Morgenstern and Price method.To evaluate the minimum reliability index defined by Hasofer and Lind and corresponding critical probabilistic slip surface,a hybrid algorithm combining chaotic particle swarm optimization and harmony search algorithm called CPSOHS is presented.The comparison of the results of the presented method,standard particle swarm optimization,and selected other methods employed in previous studies demonstrates the superior successful functioning of the new method by evaluating lower values of reliability index and factor of safety.Moreover,the presented procedure is applied for sensitivity analysis and the obtained results show the influence of soil strength parameters and probability distribution types of random variables on the reliability index of slopes. 展开更多
关键词 reliability analysis stability assessment earth slopes particle swarm optimization harmony search
下载PDF
Time-variant reliability analysis of three-dimensional slopes based on Support Vector Machine method 被引量:4
4
作者 陈昌富 肖治宇 张根宝 《Journal of Central South University》 SCIE EI CAS 2011年第6期2108-2114,共7页
In the reliability analysis of slope, the performance functions derived from the most available stability analysis procedures of slopes are usually implicit and cannot be solved by first-order second-moment approach. ... In the reliability analysis of slope, the performance functions derived from the most available stability analysis procedures of slopes are usually implicit and cannot be solved by first-order second-moment approach. A new reliability analysis approach was presented based on three-dimensional Morgenstem-Price method to investigate three-dimensional effect of landslide in stability analyses. To obtain the reliability index, Support Vector Machine (SVM) was applied to approximate the performance function. The time-consuming of this approach is only 0.028% of that using Monte-Carlo method at the same computation accuracy. Also, the influence of time effect of shearing strength parameters of slope soils on the long-term reliability of three-dimensional slopes was investigated by this new approach. It is found that the reliability index of the slope would decrease by 52.54% and the failure probability would increase from 0.000 705% to 1.966%. In the end, the impact of variation coefficients of c andfon reliability index of slopes was taken into discussion and the changing trend was observed. 展开更多
关键词 slope engineering Morgenstern-Price method three dimension Support Vector Machine time-variant reliability
下载PDF
Improved single image dehazing using dark channel prior
5
作者 Zhizhong Fu Yanjing Yang +3 位作者 Chang Shu Yuan Li Honggang Wu Jin Xu 《Journal of Systems Science & Complexity》 SCIE EI CSCD 2015年第5期1070-1079,共10页
An improved single image dehazing method based on dark channel prior and wavelet transform is proposed. This proposed method employs wavelet transform and guided filter instead of the soft matting procedure to estimat... An improved single image dehazing method based on dark channel prior and wavelet transform is proposed. This proposed method employs wavelet transform and guided filter instead of the soft matting procedure to estimate and refine the depth map of haze images. Moreover, a contrast enhancement method based on just noticeable difference(JND) and quadratic function is adopted to enhance the contrast for the dehazed image, since the scene radiance is usually not as bright as the atmospheric light,and the dehazed image looks dim. The experimental results show that the proposed approach can effectively enhance the haze image and is well suitable for implementing on the surveillance and obstacle detection systems. 展开更多
关键词 single image haze removal dark channel prior guided filter wavelet transform contrast enhancement quadratic function
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部