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Time-variant reliability analysis of three-dimensional slopes based on Support Vector Machine method 被引量:4
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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
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A state space solution for the bending problem of thick laminated piezoelectric open cylindrical shells 被引量:1
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作者 盛宏玉 《Journal of Chongqing University》 CAS 2009年第2期125-132,共8页
Based on the theories of three-dimensional elasticity and piezoelectricity, and by assuming appropriate boundary functions, we established a state equation of piezoelectric cylindrical shells. By using the transfer ma... Based on the theories of three-dimensional elasticity and piezoelectricity, and by assuming appropriate boundary functions, we established a state equation of piezoelectric cylindrical shells. By using the transfer matrix method, we presented an analytical solution that satisfies all the arbitrary boundary conditions at boundary edges, as well as on upper and bottom surfaces. Our solution takes into account all the independent elastic and piezoelectric constants for a piezoelectric orthotropy, and satisfies continuity conditions between plies of the laminates. The principle of the present method and corresponding results can be widely used in many engineering fields and be applied to assess the effectiveness of various approximate and numerical models. 展开更多
关键词 laminated piezoelectric cylindrical shells state equation bending problem boundary functions analytical solution
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毒品犯罪案件“零口供”证明问题研究
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作者 潘金贵 吴庆棒 《法治论坛》 2022年第4期209-219,共11页
受毒品犯罪的交易特殊性及刑罚严厉性等因素的影响,毒品犯罪案件“零口供”的概率普遍高于其他刑事案件,案件办理面临着“拒不供述”降低侦查取证效率、“矢口否认”影响犯罪主观认定、“幽灵抗辩”增加案件证明难度等证明难题。破解毒... 受毒品犯罪的交易特殊性及刑罚严厉性等因素的影响,毒品犯罪案件“零口供”的概率普遍高于其他刑事案件,案件办理面临着“拒不供述”降低侦查取证效率、“矢口否认”影响犯罪主观认定、“幽灵抗辩”增加案件证明难度等证明难题。破解毒品犯罪案件“零口供”证明难题可以采取“三向法”:在整体把握法面向,应完善使用刑事技术侦查措施、转变“偏重口供”的办案习惯以及建立并优化毒品专案组办案模式;在证据分析法面向,应细致地审查、分析在案相关证据,根据具体证据类型发掘案件侦办和证据体系构建的突破口;在证据推理法面向,应合理运用刑事推定规则以及严格把握间接证据定案规则,缓解司法证明的困难,增强“零口供”毒品犯罪案件办理质效。 展开更多
关键词 “零口供” 毒品犯罪 刑事推定 “三向法”
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