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Splitting and placement of data-intensive applications with machine learning for power system in cloud computing

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Digital Communications and Networks 2022年第4期8卷 476-484页

作者： Zhanyang Xu Dawei Zhu Jinhui Chen baohua yu School of Computer and Software Nanjing University of Information Science and TechnologyNanjingChina College of Information Science and Technology Shihezi UniversityXinjiangChina

Aiming to meet the growing demand for observation and analysis in power systems that based on Internet of Things(IoT),machine learning technology has been adopted to deal with the data-intensive power electronics applications in *** feeding previous power electronic data into the learning model,accurate information is drawn,and the quality of IoT-based power services is ***,the data-intensive electronic applications with machine learning are split into numerous data/control constrained tasks by workflow *** efficient execution of this data-intensive Power Workflow(PW)needs massive computing resources,which are available in the cloud ***,the execution efficiency of PW decreases due to inappropriate sub-task and data *** addition,the power consumption explodes due to massive data *** address these challenges,a PW placement method named PWP is ***,the Non-dominated Sorting Differential Evolution(NSDE)is used to generate placement *** simulation experiments show that PWP achieves the best trade-off among data acquisition time,power consumption,load distribution and privacy preservation,confirming that PWP is effective for the placement problem.

关键词： IoT-based power system Cloud Workflow Machine learning NSDE

Leak-Off Mechanism and Pressure Prediction for Shallow Sediments in Deepwater Drilling

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Journal of Ocean University of China 2018年第1期17卷 65-71页

作者： TAN Qiang DENG Jingen SUN Jin LIU Wei yu baohua State Key Laboratory of Petroleum Resources and Prospecting ChinaUniversity of Petroleum-Beijing Key Laboratory of Marine Georesources and Prospecting (Hainan Province) Institute of Deep-Sea Science and Engineering Chinese Academy of Science

Deepwater sediments are prone to loss circulation in drilling due to a low overburden gradient. How to predict the magnitude of leak-off pressure more accurately is an important issue in the protection of drilling safety and the reduction of drilling cost in deep water. Starting from the mechanical properties of a shallow formation and based on the basic theory of rock-soil mechanics, the stress distribution around a borehole was analyzed. It was found that the rock or soil on a borehole is in the plastic yield state before the effective tensile stress is generated, and the effective tangential and vertical stresses increase as the drilling fluid density increases; thus, tensile failure will not occur on the borehole wall. Based on the results of stress calculation, two mechanisms and leak-off pressure prediction models for shallow sediments in deepwater drilling were put forward, and the calculated values of these models were compared with the measured value of shallow leak-off pressure in actual drilling. The results show that the MHPS(minimum horizontal principle stress) model and the FIF(fracturing in formation) model can predict the lower and upper limits of leak-off pressure. The PLC(permeable lost circulation) model can comprehensively analyze the factors influencing permeable leakage and provide a theoretical basis for leak-off prevention and plugging in deepwater drilling.

关键词： deepwater drilling shallow sediments leak-off mechanism leak-off pressure

Theoretical analysis and applications of Y-Inversion Ventilation System in a mine fire zone

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Mining Science and Technology 2010年第5期20卷 672-676页

作者： YANG Shengqlang PANG Weidong WEN Hu yu baohua MA Zhihe HUANG Ruiling State Key Laboratory of Coal Resources and Mine Safety School of Safety and Engineering China University of Mining & Technology Xuzhou 221008 China China National Machinery Import & Export Corporation Beijing 100037 China School of Safety and Engineering Xi 'an University of Science and Technology Xi'an 710054 China Xuzhou Mining Group Xuzhou 221000 China

Based on mine fire fighting practices at the 1110 working face of the Brapukuria Coal Mine,Bangladesh,we introduce and discuss the Y-Inversion Ventilation System,the latest technology used both in mine fire zone management and the unsealing *** ventilation system can ensure that all miners breathed fresh air,providing protection for them during fire fighting and unsealing the fire *** the other hand,adjusting the amount of air at the working face and forming a CO leakage path controlled the state of the fire and as well ensured that the different fire extinguishing measures could be applied *** are all fundamental techniques which ensured successful fire extinguishing and unsealing of the fire *** also analyzed the main reasons for the spontaneous coal combustion that occurred at the 1110 working *** application of advanced composite polymer colloidal perfusion techniques,polymer foam MEA perfusion and fire-prevention technology by infusing nitrogen,used in mine fire zone management and unsealing,are *** value the experience with these techniques very highly and are of the opinion that these techniques could be widely used in mine fire fighting practices under similar spontaneous coal combustion conditions elsewhere.

关键词： Brapukuria Coal Mine coal mine fire zone management Y-Inversion Ventilation System

Micromorphology of landslide soil Case study on the Jibazi landslide in yunyang in the Three Gorges Region, China

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Journal of Mountain Science 2006年第2期3卷 147-157页

作者： HE yurong CUI Peng LIAO Chaolin ZHANG baohua ZHAO yu Chengdu Institute of Mountain Hazards and Environment Chinese Academy of Science ＆ Ministry of Water Conservation Chengdu 610064 China

Abstract： Landslide is one of natural catastrophes affecting national economy and people＇s livelihood. There are many reports on the forming mechanism and control of landslide, but the studies on micromorphology of landslide soil are few. There are many potential landslides in the Three Gorges Region in China. In this paper, the micromorphologic features of the Jibazi landslide soil in yunyang in the Three Gorges Region of the Yangtze River were studied using routine methods, that is, soil micromorphology, X-ray diffraetometer and scanning electron microscope. The main conclusions are as follow：（1） The basic micromorphologic characteristics of the landslide soil are that the fine soil particles are commonly cohesive matrix, finer and lower content of skeleton grains, the microstructures are mainly types of phenocrystal gelatinization, densely chap and fissure structure. As a result, these micromorphologic features affect the discharging of soil water, favor the movement of landslide body and provide an internal basis of materials for the formation of landslide. （2） The concept on the forming material of landslide was proposed, and types of optical beamed clay aggregates, Fe-Mn isolates and glassy material were found in landslide-belt soil, which were remarkably different from the natural soil formation, and had some scientific significance in analyzing the forming mechanism of landslide and distinguishing me landslide-belt soil. （3） Some special micromorphologic and sub-micromorphologic characteristics, such as fingerprint microstructure, clay beamed bedding microstructure, oppressive microstructure, moulage microstructure and extending hole microstncture, could bring useful micromorphologic evidences for the observation and forecasting of landslide. The results mentioned above will bring helpful micromorphologic evidences for distinguishing slide soil, analyzing the formation mechanism of landslide, and monitoring and forecasting the occurrence of landslide.

关键词： Landslide Microstructure forming material of landslide Three Gorges Region China

Analysis on Irrational Decision Making of Tobacco Family Farmers from the Perspective of Optimal Scale of Efficiency

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Asian Agricultural Research 2022年第9期14卷 7-11,15页

作者： Ya nan SUN Lulu CUI baohua yu College of Tobacco Henan Agricultural UniversityZhengzhou 450002China College of Economics and Management Henan Agricultural UniversityZhengzhou 450002China

The larger the difference between the willingness scale of tobacco family farmers and the optimal scale of efficiency,the greater the degree of irrationality,and the higher the decision making *** the aid of DEA model,this study calculated the optimal scale of efficiency of Guiyang tobacco family *** the ratio of willingness scale and efficiency optimal scale,it measured the degree of irrationality of family *** addition,with the help of multiple linear regression model,it explained the irrational decision making mechanism of family ***,it made a portrait of farmers who tend to make irrational decisions,to find specific farmers and guide them in their production and operation,reduce the risk of planting scale decision making and stabilize the sustainable development of the tobacco industry.

关键词： Irrational decision making Family farmers Optimal scale of efficiency Portrait

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基于MATLAB的背压气路特性曲线分析

中国机械工程 2006年第17期17卷 1790-1792,1841页

作者：胡小平于保华杭州电子科技大学杭州310018

提出了一种基于MATLAB平台的背压式气动量仪背压气路特性曲线的参数化绘制原理和分析方法。在该方法中,通过参数化绘制背压气路特性曲线,同时在已绘制的背压气路特性曲线上实现量仪直线部的自动选取及误差分析,可以很直观地分析气动变... 详细信息

提出了一种基于MATLAB平台的背压式气动量仪背压气路特性曲线的参数化绘制原理和分析方法。在该方法中,通过参数化绘制背压气路特性曲线,同时在已绘制的背压气路特性曲线上实现量仪直线部的自动选取及误差分析,可以很直观地分析气动变换环节各主要参数对量仪的影响,为快速正确地选择或设计量仪提供了依据。研究结果表明,该原理和方法为背压式气动量仪的设计提供了一种新的思路。

关键词：气动测量背压式气动量仪参数化绘制特性曲线

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大端接圆柱杆的复合圆锥形变幅杆设计及应用

北京航空航天大学学报 2019年第8期45卷 1630-1638页

作者：靳涛胡小平于保华杭州电子科技大学机械工程学院

针对目前国产超声变幅杆耐用性较差的问题,设计一种新型复合变幅杆,满足振幅的条件下,使变幅杆具有较小的工作应力。通过波动方程建立新型复合变幅杆参数方程,着重计算了放大倍数、形状因数及应力极大点等参数。首先,采用有限元分析软... 详细信息

针对目前国产超声变幅杆耐用性较差的问题,设计一种新型复合变幅杆,满足振幅的条件下,使变幅杆具有较小的工作应力。通过波动方程建立新型复合变幅杆参数方程,着重计算了放大倍数、形状因数及应力极大点等参数。首先,采用有限元分析软件对变幅杆进行动力学分析,得到的结果与理论结果进行比较,验证了理论公式的正确性。然后,在此基础上与圆锥形变幅杆、指数形变幅杆及小端接圆柱杆的复合圆锥形变幅杆进行比较,结果表明新型复合变幅杆具有更好的综合性能和更小的最大应力。最后,基于ANSYS Workbench优化设计功能对变幅杆进行优化修整,对优化后的变幅杆进行阻抗分析和振动性能测试,测试结果表明新型复合变幅杆理论性能参数与实验测试结果基本一致,变幅杆的谐振频率为20 013 Hz,当换能器输出振幅峰峰值为13μm时,变幅杆的输出端振幅峰峰值可达40μm,变幅杆振幅实际放大倍数为3. 08,满足切削实验振幅的要求。

关键词：综合性能寿命最大应力优化设计有限元分析

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河南省耕地压力指数动态分析与预测

中国农业资源与区划 2015年第6期36卷 17-21页

作者：喻保华河南农业大学经济与管理学院

文章通过2004;013年河南省耕地压力指数的直观数据,分析了2003年以来河南省耕地面积、粮食播种面积、粮食产量及常住人口的动态变化情况,发现河南省2003;012年耕地压力指数与最小人均耕地面积变化趋势呈现出相同的波动状态,即先呈下降趋... 详细信息

文章通过2004;013年河南省耕地压力指数的直观数据,分析了2003年以来河南省耕地面积、粮食播种面积、粮食产量及常住人口的动态变化情况,发现河南省2003;012年耕地压力指数与最小人均耕地面积变化趋势呈现出相同的波动状态,即先呈下降趋势,后在较小的波动中趋于稳定,表明2003;012年间河南省无明显耕地压力,粮食产量足以满足人口需求。同时,文章利用灰色系统理论与线性回归分析等工具对影响河南省耕地压力指数的粮食单产、实际人均耕地面积等因素的变化进行了GM（1,1）模型的构建、修正及线性回归方程的建立,测算出以后若干年河南省耕地压力指数。研究表明,未来10年河南省耕地压力指数远小于1,耕地供应能力可以满足粮食生产需求。在肥力改善,耕地巨大生产能力得以保持的基础上,优化农业种植结构,退耕还林还草,改善农业生态,甚至开发休闲农业等,都将成为可能。

关键词：耕地压力指数 GM(1,1)模型线性回归河南省耕地保护

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内孔珩磨尺寸在线气动测量系统

农业机械学报 2008年第10期39卷 202-206页

作者：于保华胡小平叶红仙浙江大学机械与能源工程学院杭州电子科技大学机械工程学院

在分析内孔珩磨尺寸在线气动测量系统工作原理的基础上,给出了内孔珩磨尺寸在线气动测量系统的总体方案及主要功能模块构成。详细设计了系统的核心模块——气动测量模块,并进行了试验。试验分析结果表明该在线气动测量系统设计是可行的。

关键词：内孔珩磨气动测量测量系统