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A phenomenological constitutive equation for Rene 95 PM alloy and its application to isothermal forging process of turbine disk

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Journal of University of Science and Technology Beijing 2002年第4期9卷 282-286页

作者： Maicang Zhang, Jianxin dong, yanping Zeng, Xishan XieMaterials Science and Engineering School, University of Science and Technology Beijing, Beijing 100083, China Mat. Sci. and Eng. Sch. Univ. of Sci. and Technol. Beijing Beijing 100083 China

The flow behavior of Rene 95 PM alloy was studied from 1050 to 1150 deg Cwith strain rate of 1 X 10^(-3), 1 X 10^(-2), 1 X 10^(-1) and 1 s^(-1). At a given temperature andstrain rate, flow curves exhibit a peak followed by flow softening up to a steady state. Moreover,at constant strain, flow stress increases with increasing strain rate and decreasing temperature. Anequation relating hyperbolic sine of flow stress to hot working parameters, such as strain, strainrate and temperature, was established by using multiple nonlinear regression method. A very goodagreement was found between predicted and experimental flow stress in all the strain rangeinvestigated. Application of the constitutive equation in predicting forming loads and flow behaviorand temperature distribution in both upper and lower dies in an isothermal forging process ofturbine disk of large dimension (about 630 mm) by means of a finite element code was systematicallyanalyzed.

关键词： constitutive equation finite element method isothermal forging Rene 95PM alloy

Analysis of Service Tactics Based on Library Resources

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Journal of Contemporary Educational Research 2018年第2期2卷 9-16页

作者： dong yanping Zhongyuan University of Technology Zhengzhou 450007China

The development of intelligent and personalized recommendation service has become the trend in the era with rapid development of digital library and the popularization of intelligent ***,the traditional personalized service cannot meet the needs of users and the demands of digital library’s ***,the needs of users are becoming *** to accurately describe and fully understand the user's complex personalized requirements,and how to make the recommendation of resource services according to their needs have become a difficult *** the other hand,because the resources of digital libraries are huge,it’s the focus that how to effectively collect massive resources and support efficient retrieval and recommendations,as well as how to fully exploit the intrinsic semantic links of digital library *** this regard,this review aim to analyze the construction of library resources informatization in the era of big data and expounds the important significance of constructing digital *** paper alsooptimizes the services of the wisdom libraries after analyzing informatization library resources from the aspects of image resources,service strategies of MOOC and reading ***,it studies the approaches of realizing the service strategies of library resources which can be used for reference.

关键词： big data library resources service tactics approaches

Utilization of Resources and Optimization of Services in Libraries

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Journal of Contemporary Educational Research 2021年第5期5卷 90-95页

作者： yanping dong Zhongyuan University of Technology Zhengzhou 450007Henan ProvinceChina

“Resource utilization”is the foundation of library *** article analyzes the reasons of low utilization of library *** that,the existing resources are classified according to different *** methods of utilizing the existing resources in the library are also *** on the analysis,by optimizing the service patterns,the service reaches more targeted readers as well as improve the utilization rate of existing resources.

关键词： Library Resource utilization Service

Library Information Resource Allocation: Problems and Countermeasures

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Journal of Contemporary Educational Research 2019年第2期3卷 35-39页

作者： yanping dong Zhongyuan University of Technology ZhengzhouHenan450007China

The library is the center of information gathering of a *** collections present in the library can be regarded as a huge resource of information,consisting of rich knowledge contents from various ***,the access to this information is still considered imperfect,where many of these knowledge contents are rarely used or even touched while other resources were often left vacant which has led to many contradictions in the application of information resources in higher learning institution *** article focuses on the analysis of the problems existing in the allocation and management of library information resources,with proposed corresponding solutions.

关键词： configuration problem countermeasure information resources library

Prevention and Control Strategy of Reader Factors in Safety Management of Electronic Reading Room

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Journal of Electronic Research and Application 2021年第5期5卷 20-24页

作者： yanping dong Zhongyuan University of Technology ZhengzhouHenan ProvinceChina

Many libraries have built and opened the electronic reading room,electronic reading room security management has been paid more and more *** the specific safety management,the prevention and control of reader factors is very *** comparing and analyzing the prevention and control of reader factors in the safety management of some electronic reading rooms,it can be found that the corresponding prevention and control situation is not ideal,and even there are some obvious problems,which also leads to great hidden dangers in the safety management *** paper will specifically analyze the prevention and control of reader factors in the safety management of electronic reading room,and put forward more effective prevention and control strategies.

关键词： Electronic reading room Safety management Readers*

Research on the Utilization and Optimal Management of Electronic Information Resources in University Libraries

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Journal of Electronic Research and Application 2022年第3期6卷 6-11页

作者： yanping dong Yanchao Huo Zhongyuan University of Technology Zhengzhou 450000Henan ProvinceChina

Through theoretical analysis,this paper expounds the value of strengthening the utilization of electronic information in university libraries and the reasons affecting the utilization rate of information resources in electronic libraries,so as to give better play to the role of university libraries and improve the utilization rate of electronic information in university *** view of the existing problems,this paper puts forward measures to optimize the utilization rate of electronic information resources in university libraries and give full play to the role of electronic information resources,so as to promote information exchange and development.

关键词： University library Electronic information Resource utilization

Tiger, Tiger Burning Bright

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China Today 2008年第6期57卷 42-43页

作者： GE GUANGZHI, dong yanping & GUO HUIQING

IT is no big news that a farm-ing community sometimes pro-duces an artist or two. But when there are hundreds, that

关键词：老虎河南文化传统艺术作品

Study on Treatment Technologies of High Concentrations of Industrial Organic Wastewater

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Meteorological and Environmental Research 2015年第5期6卷 63-65页

作者： dong yanping Zhu Weina Xiao Jie Zhu Qiujun Tianjin Environmental Impact Assessment Center

The characteristics and harm of high concentrations of organic wastewater were introducecl firstly, and then several treatment processes and effects of high concentrations of organic wastewater were summarized, which ... 详细信息

关键词： High concentrations of industrial organic wastewater Treatment process Treatment effect China

Overview on Air Pollution Control Promoting the Improvement of Ambient Air Quality in Tianjin

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Meteorological and Environmental Research 2017年第4期8卷 69-72页

作者： dong yanping Wang Xin Liu Wei Zhu Qiujun China Lianhe Equator Environmental Impact Assessment Co. Ltd.Tianjin 300042China

To improve ambient air quality and return citizens blue sky and white clouds,national and local administrative departments all issue corresponding countermeasures to strictly prevent and control air pollution,reduce total pollutant emission,and improve environmental management level. In this paper,taking Tianjin as an example,change situation of regional air pollution and its prevention and control management situation were summarized.

关键词： Ambient air quality Air pollution Countermeasures Environmental management