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湿有效能量层结分量计算和斜压分量判定的简化及其应用
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作者 李开元 李任承 +3 位作者 霍英 刘娜静 高万泉 高霞 《气象科技进展》 2022年第3期34-43,62,共11页
根据大气运动方程组,引入了单位质量气块的总能量在气压场非定常情况下和定常情况下,两种不同表达式,对湿有效能量(MAE)的“参考状态”再讨论,省却了对“参考气压”的繁琐计算;将湿有效能量分解为“层结分量”和“斜压分量”两部分,提出... 根据大气运动方程组,引入了单位质量气块的总能量在气压场非定常情况下和定常情况下,两种不同表达式,对湿有效能量(MAE)的“参考状态”再讨论,省却了对“参考气压”的繁琐计算;将湿有效能量分解为“层结分量”和“斜压分量”两部分,提出了MAE及其层结分量和斜压分量新的收支方程;提出了“有限气柱内平均单位质量气块的层结分量”计算方法和若干计算实例以及斜压分量强度的判定方法。MAE的层结分量与位势不稳定能量相对应,计算表明:抬升作用和负变压使层解分量迅速增强。有限气柱内单位质量气块的层结分量通常与对流有效位能(CAPE)呈正相关关系,但二者性质不同。邢台2016年7月19日夜间至20日凌晨遭受百年一遇的特大暴雨,分析表明:大尺度环流背景、天气尺度系统的发展制约和运行、有利的地形条件、充足的水汽供应和能量输入,促成湿有效能量大量集中释放,是“邢台7.19暴雨”发生的重要原因。 展开更多
关键词 湿有效能量 参考状态 层结分量 斜压分量 对流有效位能 邢台7.19暴雨
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Mechanical properties and microscopic failure process of exemplary argillaceous interlayer from east China
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作者 SUN Shao-rui LIU Yong +5 位作者 HAO She-feng HE Wei HE Xun WEI Ji-hong YU Yong-xiang SONG Jing-lei 《Journal of Central South University》 SCIE EI CAS CSCD 2022年第6期1973-1986,共14页
The landslide disaster caused by the argillaceous interlayer not only destroys buildings,cultivated land,and roads but also seriously endangers human life and safety.This study concerns the mineral composition of sele... The landslide disaster caused by the argillaceous interlayer not only destroys buildings,cultivated land,and roads but also seriously endangers human life and safety.This study concerns the mineral composition of selected argillaceous interlayer and their strength characteristics.To study the mineral composition of argillaceous interlayers,8 kinds of samples in the southern Jiangsu region of China were analyzed utilizing X-ray diffraction(XRD).The repeated direct shear strength tests(RDST)were carried out on the undisturbed specimens of the argillaceous interlayer.The results show that the argillaceous interlayer with high content of kaolinite shows ductile failure mode,which means that there is no obvious residual strength in the shear process.The arrangement of mineral particles on the shear surface of the specimens after different shear displacements was observed under the scanning electron microscope(SEM).It was observed that mineral particles on the shear surface showed a more directional arrangement with the increase of shear displacement.Furthermore,the influence of shear direction on the argillaceous interlayer with completely oriented mineral particles was studied through numerical experiments with four shear strength mechanisms proposition proposed.The influence of the mineral arrangement on the action occasion and magnitude of dilatancy component of shear strength is clarified in the shear mechanism. 展开更多
关键词 argillaceous interlayer microcosmic structure strength component directional arrangement discrete element method LANDSLIDES
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Measuring the Complexity of Business Organization and Business Software Using Analytic Hierarchy Process (AHP)
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作者 Alen Jakupovie Mile Pavlie 《Computer Technology and Application》 2011年第9期736-747,共12页
The paper shows a proposition of metrics for measuring the complexity of the business organization and business software. The metrics is based on a subjective estimation of complexity of the elements from a part of th... The paper shows a proposition of metrics for measuring the complexity of the business organization and business software. The metrics is based on a subjective estimation of complexity of the elements from a part of the structure of business organization or business software in relation to other elements from the observed part. Estimation is performed based on the measuring scale for comparison of complexity of elements, and reaching a final conclusion on the complexity of elements in relation to other elements, through the Analytic Hierarchy Process (AHP). Defined in this manner, the metrics represents a unique metrics for measuring the complexity of elements of business organization and business software, which enables their comparison. The paper also presents a short overview of existing metrics for measuring the complexity of business organization and business software. 展开更多
关键词 Analytic hierarchy process (AHP) business organization business software COMPLEXITY metrics
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