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Six-Degree-of-Freedom Measurement of Plate Anchors in Centrifuge by Magnetometers

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China Ocean Engineering 2022年第6期36卷 871-879页

作者： shu shuang CHEN Chuan CHEN Hao-ran LAI Ying Key Laboratory of the Ministry of Education for Geomechanics and Embankment Engineering College of Civil and Transportation EngineeringHohai UniversityNanjing 210098China MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering College of Civil Engineering and ArchitectureZhejiang UniversityHangzhou 310058China

The six-degree-of-freedom movement of an offshore plate anchor is essential to evaluate anchor *** an emerging technology,magnetometer has shown its potential in measuring the six-degree-of-freedom movement of offshore anchors under 1-g model laboratory *** paper presents the feasibility of adopting a magnetometer system in geotechnical centrifuge *** factors that may affect the measuring accuracy of the magnetometer system are *** results demonstrate that the magnetometer system can accurately catch the anchor movement in the soils with the restrictions of:(1)the model anchor was made with stainless steel;(2)the system was placed at least 30 cm away from the side wall of soil model tank;(3)started the measurement when the artificial acceleration by centrifuge was stable.

关键词： magnetometer offshore plate anchors centrifuge testing trajectory orientation

Synthesis and catalytic properties of hierarchical TS-1 in the presence of cationic organosilane surfactant

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Chinese Chemical Letters 2011年第3期22卷 303-305页

作者： shu shuang Li An Feng Zhang Min Liu Xin Wen Guo State Key Lab of Fine Chemicals School of Chemical Engineering Dalian University of Technology Dalian 116012 China

Hierarchical TS-1 has been synthesized in the presence of cationic organosilane *** material is characterized with XRD,TEM,N_2 adsorption *** results show that the hierarchical TS-1 aggregates consist of small primary units with sizes of 20-30 *** BET surface area increases from 420 to 513 m^2/g compared to conventional TS-1 *** sample is shown to be more active in epoxidation of cyclohexene than conventional TS-1.

关键词： Cationic organosilane surfactant Hierarchical TS-1 Cyclohexene

Photoluminescence properties and thermal stability of Eu^(3+)-activated La_(7)Ta_(3)W_(4)O_(30) red-emitting phosphors for near-UV-excited w-LEDs

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Journal of Rare Earths 2021年第8期39卷 905-912页

作者： Yu Ren Bin Deng Ting Liang shuang shu Junlan Guo Shoucheng Zhao Ruijin Yu College of Chemistry&Pharmacy Northwest A&F UniversityYangling 712100China College of Chemistry&Biology and Environmental Engineering Xiangnan UniversityChenzhou 423043China Hunan Provincial Key Laboratory o/Xiangnan Rare-Precious Metals Compounds Research and Application Xiangtan UniversityChenzhou 423043China College of Materials and Chemical Engineering Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion MaterialsChina Three Gorges UniversityYichang 443002China

Novel trivalent europium(Eu^(3+))-activated La_(7)Ta_(3)W_(4)O_(30):xEu^(3+)(x=0.5 mol%-40 mol%) red-emitting phosphors were synthesized by means of a high-temperature solid-state *** structure,morphology,photoluminescence,thermal-stability properties,lifetime,and color-rendering of the prepared phosphors were investigated in *** La_(7)Ta_(3)W_(4)O_(30):Eu^(3+) phosphors show five emission peaks under near-ultraviolet(n-UV) at 397 nm,and these peaks are ascribed to the transitions of ^(5)D0-^(7)Fj(j=0,1,2,3 and 4) by Eu^(3+) *** optimal doping concentration of Eu^(3+) is 20 mol%,and the critical distance of the energy transfer between the Eu^(3+)ions was calculated to be 1.768 *** quenching temperature(T_(0.5)) of La_(7)Ta_(3)W_(4)O_(30):20 mol%Eu^(3+) is about 440 *** quantum yield(QY) was measured to be 85.85%.The fabricated white-light-emitting diodes(w-LEDs) possess high color-rendering index(R_(a)) of 90,and high correlated color temperature(CCT) of 5810 K,*** Commission Internationale de L’Eclairage(CIE) coordinates are(0.311,0.322).Therefore,the prepared phosphor has a promising application for w-LEDs.

关键词： Luminescence Phosphor Tungstate La_(7)Ta_(3)W_(4)O_(30) Rare earths

Improved plasma position detection method in EAST Tokamak using fast CCD camera

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Nuclear Science and Techniques 2019年第2期30卷 71-80页

作者： shuang-Bao shu Chuan-Mu Yu Chao Liu Mei-Wen Chen Yu-Zhong Zhang Xin Li School of Instrument Science and Opto-electronics Engineering Hefei University of Technology China Institute of Plasma Physics Chinese Academy of Sciences

To control the steady-state operation of Tokamak plasma, it is crucial to accurately obtain its shape and position. This paper presents a method for use in rapidly detecting plasma configuration during discharge of the Experimental Advanced Superconducting Tokamak device. First, a visible/infrared integrated endoscopy diagnostic system with a large field of view is introduced,and the ***5.5 camera in this system is used to acquire a plasma discharge image. Based on the analysis of various traditional edge detection algorithms, an improved wavelet edge detection algorithm is then introduced to identify the edge of the plasma. In this method, the local maximum of the modulus of wavelet transform is searched along four gradient directions, and the adaptive threshold is adopted. Finally, the detected boundary is fitted using the least square iterative method to accurately obtain the position of the plasma. Experimental results obtained using the EAST device show that the method presented in this paper can realize expected goals and produce ideal effects;this method thus has significant potential for application in further feedback control of plasma.

关键词： Experimental Advanced Superconducting Tokamak (EAST) Plasma CCD camera Edge detection

Calculation of the heat flux in the lower divertor target plate using an infrared camera diagnostic system on the experimental advanced superconducting tokamak

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Nuclear Science and Techniques 2019年第6期30卷 63-69页

作者： Zhi-Xue Cui Xin Li shuang-Bao shu Jia-Rong Luo Mei-Wen Chen Yu-Zhong Zhang College of Information Sciences and Technology Donghua University Shanghai 201620 China School of Instrument Science and Opto-electronics Engineering Hefei University of Technology Hefei 230009 China Institute of Plasma Physics Chinese Academy of Sciences Hefei 230031 China

During the discharging of Tokamak devices, interactions between the core plasma and plasma-facing components (PFCs) may cause exorbitant heat deposition in the latter. This poses a grave threat to the lifetimes of PFCs materials. An infrared (IR) diagnostic system consisting of an IR camera and an endoscope was installed on an Experimental Advanced Superconducting Tokamak (EAST) to monitor the surface temperature of the lower divertor target plate (LDTP) and to calculate the corresponding heat flux based on its surface temperature and physical structure, via the finite element method. First, the temperature obtained by the IR camera was calibrated against the temperature measured by the built-in thermocouple of EAST under baking conditions to determine the true temperature of the LDTP. Next, based on the finite element method, a target plate model was built and a discretization of the modeling domain was carried out. Then, a heat conduction equation and boundary conditions were determined. Finally, the heat flux was calculated. The new numerical tool provided results similar to those for DFLUX;this is important for future work on related physical processes and heat flux control.

关键词： EAST Divertor target plate Infrared camera Heat flux Finite element analysis

Nested Newmark model to estimate permanent displacement of seismic slopes with tensile strength cut-off

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Journal of Central South University 2019年第7期26卷 1830-1839页

作者： ZHOU Zheng ZHANG Fei GAO Yu-feng shu shuang Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering Hohai University

Nested Newmark model(NNM) is a conceptual framework to assessing post-earthquake movements including dispersed shear movements. The original NNM omits that the tensile stresses would be encountered in slopes induced by earthquakes. The purpose of this study is to introduce the tensile strength cut-off and the relevant failure mechanism into NNM and conduct the limit analysis to determine the seismic displacement. Parametric studies are carried out to further investigate the influence of the tensile strength and input ground motions on permanent displacement. Neglecting the tensile strength can underestimate the permanent displacements of slopes. As the peak acceleration increases, the underestimation becomes more significant. With the reduction of tensile strength, much larger deformation occurs next to the slope crest. Although the present results are limited to an example, the method is of value in practice to predict the post-earthquake profile of slope.

关键词： slopes limit analysis earthquakes permanent displacement Newmark tensile strength

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科技型企业人力资源管理体系的构建

科学管理研究 2012年第6期30卷 94-97页

作者：王书爽黄淮学院经济管理系河南驻马店463000

现代科技型企业的竞争致使各类企业需要面对压力和挑战剧增的生存环境,针对智力密集型的科技型企业如何有效地管理人力资源,最大限度的利用与开发好有限的人力资源,通过人力资源管理有效采取策略,建立起与科技型企业战略相配套的战略人... 详细信息

现代科技型企业的竞争致使各类企业需要面对压力和挑战剧增的生存环境,针对智力密集型的科技型企业如何有效地管理人力资源,最大限度的利用与开发好有限的人力资源,通过人力资源管理有效采取策略,建立起与科技型企业战略相配套的战略人力资源管理体系,已成为科技型企业发展的重要战略目标。提出了科技型企业人力资源管理体系的构建机制,旨在提出一种依靠人力资源管理提高科技型企业效益的方法。

关键词：科技型企业人力资源管理体系构建