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DIGITAL IMAGE MEASUREMENT OF BUBBLE MOTION IN AERATED WATER FLOWS

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Journal of Hydrodynamics 2002年第3期14卷 44-49页

作者： Chen, Gang Xu, Lian-Feng Shao, Jian-Bin Yang, Yong-Quan Dai, Guang-Qing Inst. of Hydraulics Xi'an Univ. of Technol. Xi'an 710048 China Hydraulics Lab. of High Speed Flows Sichuan Univ. Chengdu 610065 China

Digital image measurement method, as an extension of Particle Image Velocimetry of single-phase flow measurement, was investigated for application to air-water two-phase flows. The method has strong potential ability in measuring bubble geometrical features and moving velocities for complex bubble motion in aerated water flow. Both diluted and dense bubble rising flows are measured using the digital image method. Measured bubble shapes and sizes, and bubble velocities are affected by threshold selection for binary image. Several algorithms for selecting threshold are compared and methods for calculating the time-averaged void fraction are discussed.

关键词： Air Algorithms Bubbles (in fluids) Image processing Velocimeters Water

Study on the Influencing Mechanism of Relational Mechanisms on Firms’ Innovation Performance——Intermediary Effect of Relationship Learning

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Study on the Influencing Mechanism of Relational Mechanisms ...

2011 International Conference on Management Science and Intelligent Control(ICMSIC 2011)

作者： Xudong PEI School of Economics and Management xi’an university of technology xi’an Shiyou university 2 xi’an China Suicheng LI School of Economics and Management xi’an university of technology xi’an China

Based on organizational learning, the influencing mechanism of relational mechanisms on firms’ innovation performance is explored. The results show that although relational mechanisms and innovation performance are significantly positive correlation, relational learning partially mediates the relationship between relational mechanisms and innovation performance. Absorptive capacity moderates the effect of relationship learning on innovation performance.

关键词： relational mechanisms relationship learning absorptive capacity innovation performance.

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黄土高原丘陵沟壑区土壤侵蚀研究进展

水土保持学报 2001年第2期15卷 121-124,128页

作者：张翼西安理工大学陕西西安710048

通过对近年来黄土高原丘陵沟壑区土壤侵蚀研究成果的综合分析 ,详细论述了这类地区土壤水力侵蚀的类型与机理、土壤侵蚀的营力机制、主要影响因素及流域产沙的预报与防治 ;指出了土壤形成与流失、输运与沉积、“利”与“害”、侵蚀和保... 详细信息

通过对近年来黄土高原丘陵沟壑区土壤侵蚀研究成果的综合分析 ,详细论述了这类地区土壤水力侵蚀的类型与机理、土壤侵蚀的营力机制、主要影响因素及流域产沙的预报与防治 ;指出了土壤形成与流失、输运与沉积、“利”与“害”、侵蚀和保持的动态平衡。

关键词：土壤侵蚀黄土高原丘陵沟壑区发生机理预报防治

Experimental Study and Property Analysis of Seal-filling Hydrogel Material for Hermetic Wall in Coal Mine

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Journal of Wuhan university of technology(Materials Science) 2010年第1期25卷 152-155页

作者：罗振敏 School of Energy Engineering Key Western China Laboratory for Coal Exploitation Development and Safety for Ministry of EducationXi'an University of Science and Technology

The effects of monomer, crosslinker, and accelerator content on the mechanical property of seal-filling hydrogel material for building hermetic wall were analyzed through a series of single-direction compression experiments. Grey predication by GM（1,1） model was also used to analyze the persistent property of hydrogel material. The results showed that the elastic modulus and strength of seal-filling hydrogel increased, and the elastic tended to reduce with the growth of monomer and crosslinker content. In comparison, the effect of accelerator content was diametrically opposed. At the same time, staggered change of elastic modulus occurred and its demarcation point generally appeared at the point of 50% of vertical deformation value. In addition, through the testing of correlation degree, the accuracy of the grey prediction model to test the persistent stability of hydrogel material can be proved. As the concentration of hydrophilic monomer in hydrogel material increased, the stability was improved. The energy originated from explosion shock wave can be absorbed by seal-filling hydrogel through deformation.

关键词： hermetic wall hydrogel mechanical property persistent stability

Green Architectural technology Optimization Design Longgang High School’s Canteen Design as an Example

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Green Architectural Technology Optimization Design Longgang ...

Poverty Occurrence Characteristics of Ancient Towns and Villages in Shanxi Province and Poverty Reduction Countermeasures

International Conference on Optimization Design(ICOD 2010)

作者： Peng Yue College of Architecture xi’an university of Architecture and technology xi’an China Jiaping Liu College of Architecture xi’an university of Architecture and technology xi’an China Bin Zhou Dept.of Foreign Studies xi’an university of Architecture and technology xi’an China Yixuan Lu College of Architecture xi’an university of Architecture and technology xi’an China

＜正＞Problems such as poor indoor environment, pollution to the surrounding environment and waste of water and power universally exist in the school’s *** view of this,in the design of Hanzhong Longgang High School’s canteen,the pre-researcb was firstly made to discover and analyze the existing environmental problems and their causes;then the design goals were brought forward to lower the environmental pollution,improve indoor environmental quality,and reduce energy *** that,green technological measures were selected and optimized to be applied to the architectural space ***,architectural scheme was *** the architectural design,the green technology has been applied to achieve the proposed goals in order to create a healthy,comfortable dining environment for the students,and at the same time accumulate the experience of optimized design on green buildings.

关键词： green technology canteen optimal design

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Asian Agricultural Research 2012年第5期4卷 13-16,21页

作者： LI xian-e,MA Jing xi’an university of Architecture and technology,xi’an 710055,China

Based on the questionnaire of 10 sample ancient towns and villages in Shanxi Province,we analyze the poverty occurrence characteristics of ancient towns and villages in Shanxi Province: the poverty incidence in ancient towns and villages is high,with the slow pace of poverty re- duction; the regional characteristics of poverty is prominent; there are conspicuous differences in income between residents living in old houses and residents not living in old houses; poverty reduction shows vulnerability and instability. Then we put forward countermeasures for poverty reduction of ancient towns and villages in Shanxi Province as follows: first,improving the targeting mechanism of poverty in ancient towns and villages; second,speeding up the development of agricultural industrialization in ancient towns and villages; third,advancing internal " urbanization" of ancient towns and villages and new countryside construction; fourth,strengthening infrastructure building in ancient towns and villages; fifth,providing fair and efficient allocation of resources,and reducing regional differences; sixth,promoting the ability of residents in ancient towns and villages to cope with poverty reduction vulnerability.

关键词： Ancient towns and villages Poverty Occurrence char

维普期刊数据库评论

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砧座运动仿真分析

系统仿真学报 2008年第11期20卷 3028-3031页

作者：贺文海西安科技大学机械工程学院西安710054

当锻件受到冲击时,电动液压锻锤的砧座将剧烈振动,为了分析其运动规律,建立了相应的非线性仿真模型。仿真模型中,砧座的运动被分为振动及上抛运动两个阶段。振动阶段,由于锤头冲击锻件,可以利用由锤头、锻件及砧座组成弹簧-质量-阻尼系... 详细信息

当锻件受到冲击时,电动液压锻锤的砧座将剧烈振动,为了分析其运动规律,建立了相应的非线性仿真模型。仿真模型中,砧座的运动被分为振动及上抛运动两个阶段。振动阶段,由于锤头冲击锻件,可以利用由锤头、锻件及砧座组成弹簧-质量-阻尼系统模拟砧座的运动。上抛运动阶段,由于锤头与锻件脱离,砧座的运动等效为刚体竖直方向的运动。由仿真分析可知,仿真结果与测试结果吻合得较好。

关键词：砧座振动上抛运动仿真 Simulink

Support Vector Machine Applying in the Prediction of Effluent Quality of Sewage Treatment Plant with Cyclic Activated Sludge System Process

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Support Vector Machine Applying in the Prediction of Effluen...

2008 IEEE International Symposium on Knowledge Acquisition and Modeling Workshop(KAM 2008)

作者： Wang Li-juan Information school xi’An technology university xi’An 710032 ChinaChen Chao-bo Information school xi’An technology university xi’An 710032 China

Sewage treatment system is a complicated nonlinear system with multi-variables,chemical reaction,biological process and altered loads,hard to describe *** prediction of the effluent quality of sewage treatment plant through a mathematical model has being a *** this paper we adopts regression support vector machine （SVM） to set up a prediction model of a sewage treatment plant with a popular process Cyclic Activated Sludge System （CASS）.Kernel function of the prediction model is radial basic function,and parameters of the kernel function are optimally determined by *** the prediction model is used to predict effluent quality of the sewage treatment plant with CASS *** result of the case study shows that the prediction model works well and the regression SVM is powerful in predicting effluent quality of CASS process sewage treatment plant with small sample learning ability and good generalization.

关键词： SVM(Support Vector Machine) prediction model sewage treatment CASS(Cyclic Activated Sludge System)

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频繁项目集二次挖掘方法研究

系统工程与电子技术 2004年第11期26卷 1701-1704页

作者：杨君锐西安科技大学计算机科学与技术系陕西西安710054

针对关联规则数据挖掘中频繁项目集的二次挖掘问题,提出了一种能够解决当最小支持度发生变化而交易数据库不变情况下进行二次挖掘的改进算法(UMSA)。该算法充分利用频繁项目集的特性,通过新的拼接方法来减少候选项目集的生成,在扫描交... 详细信息

针对关联规则数据挖掘中频繁项目集的二次挖掘问题,提出了一种能够解决当最小支持度发生变化而交易数据库不变情况下进行二次挖掘的改进算法(UMSA)。该算法充分利用频繁项目集的特性,通过新的拼接方法来减少候选项目集的生成,在扫描交易数据库确定k维频繁项目集时,采用在交易数据库中剔除无用的交易,达到不断减小交易数据库规模的目的,克服了一些算法中存在的漏采现象,并在一定程度上解决了非确定性问题。通过举例说明该算法的执行过程及其算法的正确性和有效性,并对其性能进行了分析。

关键词：关联规则二次挖掘频繁项目集