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Characteristics analysis and parameters optimization for the grating eddy current displacement sensor

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第7期10卷 1029-1037页

作者： hong-li qi Hui ZHAO Wei-wen liU Department of Instrument Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China

The grating eddy current displacement sensor (GECDS) for distance or position measurement used in watertight electronic calipers was described. The sensor relies on repetitive variation of inductance against displacement caused by the change of coupling areas between moving coils and static reflectors. The investigations focused on setting up and utilizing a computer model of the 3D eddy current fields and geometry to analyze causes of the production of measurement blind areas, and to investigate effects of the sensor parameters, such as axial gap between coils and reflectors, reflector length and reflector width on characteristics of the sensor. Simulation results indicated that the sensor has the smallest nonlinearity error of 0.15%, which agrees well with the experimental results.

关键词： Grating eddy current displacement sensor (GECDS) Watertight electronic calipers Parameters optimization Nonlinearity

Wigner Function of Density Operator for Negative Binomial Distribution

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Communications in Theoretical Physics 2008年第6期49卷 1453-1456页

作者： XU Xing-Lei li hong-qi Department of Physics Heze University Heze 274015 China Key Laboratory of Quantum Communication and Calculation Heze University Heze 274015 China

By using the technique of integration within an ordered product （IWOP） of operator we derive Wigner function of density operator for negative binomial distribution of radiation field in the mixed state case, then we derive the Wigner function of squeezed number state, which yields negative binomial distribution by virtue of the entangled state representation and the entangled Wigner operator.

关键词： IWOP Wigner function negative binomial distribution

New thiopyran-4-spiro-2′-(1,3-dithiolane):Formation mechanism and crystal structure

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Chinese Chemical Letters 2011年第3期22卷 280-283页

作者： hong qi li Zhong Bao Zhang lin li Key Laboratory of Science & Technology of Eco-Textile Ministry of Education College of Chemistry Chemical Engineering and Biotechnology Donghua University Shanghai 201620 China

Ethylene trithiocarbonate reacted with dimethyl acetylenedicarboxylate to furnish tetramethyl thiopyran-4-spiro-2＇-（1,3- dithiolane）-2,3,5,6-tetracarboxylate,a new thiopyran-4-spiro-2＇-（1,3-dithiolane） heterocyclic compound,as the minor product together with the major product dimethyl 2-thioxo-1,3-dithiole-4,*** new heterocycle was probably formed through a[2 ＋ 2]cycloaddition between ethylene trithiocarbonate and dimethyl acetylenedicarboxylate followed by a 1,3-dipolar cycloaddition or[4 ＋ 2]*** structure of the new compound revealed that the thiopyran ring and 1,3-dithiolane moiety were perpendicular to each other.

关键词： Thiopyran-4-spiro-2'-(1 3-dithiolane) Cycloaddition Mechanism Crystal structure

Wavefield continuation datuming using a near surface model

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Applied Geophysics 2007年第2期4卷 94-100页

作者： Cui Xingfu li hongbing Hu Ying liang hong qi li Geophysical Technology Department Research Institute of Petroleum Exploration ＆ Development PetroChina. Beijing（100083）

When topography and low velocity zone differences vary greatly, conventional vertical static time shifts will cause wavefield distortion and influence wave equation seismic imaging for seismic data acquired on a complex near surface. In this paper, we propose an approach to datum correction that combines a joint tomography inversion with wavefield continuation to solve the static problem for seismic data on rugged acquisition topography. First, the near surface model is obtained by refracted wave tomography inversion. Second, the wavefield of sources and receivers are continued downward and upward to accomplish datum correction starting from a flat surface and locating the datum above topography. Based on the reciprocal theorem, Huygens＇ and Fresnel principles, the location of sources and receivers, and regarding the recorded data on the surface as a secondary emission, the sources and receivers are upward-continued to the datum above topography respectively. Thus, the datum correction using joint tomography inversion and wavefield continuation with the condition of a complex near surface is accomplished.

关键词： Complex near surface tomography inversion wavefield continuation datum correction.

New Route to Deducing Integration Formulas by Virtue of the IWOP Techniqu~

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Communications in Theoretical Physics 2011年第3期55卷 415-417页

作者： FAN hong-Yi li hong-qi XU Xing-Lei Department of Physics Shanghai Jiao Tong University Shanghai 200030 China Department of Physics Heze University Heze 274015 China

We point out a new route to deducing integration formulas, i.e., using the technique of integration within an ordered product （IWOP） of operators we derive some new integration formulas, which seems concise. As a by... 详细信息

关键词： the IWOP technique new integration formulas new operator identities Hermite polynomial

Relationship Between Wave Function and Corresponding Wigner Function Studied in Entangled State Representation

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Communications in Theoretical Physics 2008年第5期49卷 1159-1162页

作者： XU Xing-Lei li hong-qi FAN hong-Yi Department of Physics Heze University Heze 274015 China Department of Material Science and Engineering University of Science and Technology of China Hefei 230026 China

By using the explicit form of the entangled Wigner operator and the entangled state representation we derive the relationship between wave function and corresponding Wigner function for bipartite entangled systems. Th... 详细信息

关键词： Wigner function entangled state representation IWOP technique

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面向大飞机制造的供应链教材建设研究

物流研究 2024年第1期 69-78页

作者：李红启王飞龙王祉淇北京航空航天大学交通科学与工程学院北京100191

本文借助文本挖掘技术,对大飞机制造供应链研究和实践中涉及的供应链知识进行提取;选取223本供应链教材作为知识点的来源,用41个知识点大类及细分的1584个知识点来构建供应链专业知识体系,根据词频表筛选出37个和大飞机制造供应链关系... 详细信息

本文借助文本挖掘技术,对大飞机制造供应链研究和实践中涉及的供应链知识进行提取;选取223本供应链教材作为知识点的来源,用41个知识点大类及细分的1584个知识点来构建供应链专业知识体系,根据词频表筛选出37个和大飞机制造供应链关系密切的大类知识点;将SLP法的基本技术思路进行移植运用,对供应链知识点之间的逻辑关系进行梳理。基于教材评价和文本挖掘结果,对大飞机制造供应链教材内容进行分级整理,并对大飞机供应链教材建设提出了对策建议。

关键词：大飞机制造供应链课程教材评价文本挖掘 SLP

Parameters optimization and nonlinearity analysis of grating eddy current displacement sensor using neural network and genetic algorithm

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第8期10卷 1205-1212页

作者： hong-li qi Hui ZHAO Wei-wen liU Hai-bo ZHANG Department of Instrument Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China Instrumentation Science and Dynamic Measurement Laboratory North University of China Taiyuan 030051 China

A grating eddy current displacement sensor(GECDS) can be used in a watertight electronic transducer to realize long range displacement or position measurement with high accuracy in difficult industry *** parameters optimization of the sensor is essential for economic and efficient *** paper proposes a method to combine an artificial neural network(ANN) and a genetic algorithm(GA) for the sensor parameters optimization.A neural network model is developed to map the complex relationship between design parameters and the nonlinearity error of the GECDS,and then a GA is used in the optimization process to determine the design parameter values,resulting in a desired minimal nonlinearity error of about 0.11%.The calculated nonlinearity error is 0.25%.These results show that the proposed method performs well for the parameters optimization of the GECDS.

关键词： Grating eddy current displacement sensor (GECDS) Artificial neural network (ANN) Genetic algorithm (GA) Parameters optimization Nonlinearity error

New Two-Mode Coherent-Intermediate-Entangled State and Its Squeezing Operator

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Communications in Theoretical Physics 2009年第11期52卷 808-812页

作者： XU Shi-Min XU Xing-Lei li hong-qi Department of Physics Heze University Heze 274015 China Key Laboratory of Quantum Communication and Calculation Heze University Heze 274015 China

The coherent-intermediate-entangled state ｜α, x）λ,v is proposed in the two-mode Fock Space, which exhibits both the properties of the coherent and entangled states. The ｜α, x）λ,v makes up a new quantum mechanical representation, and the completeness relation of ｜α, x）λ,v is proved by virtue of the technique of integral within an ordered product of operators. The corresponding squeezing operators are derived. Furthermore, Generalized P-representation is constructed in the coherent-intermediate-entangled state ｜α, x）λ,v and the Schmidt decomposition of ｜α, x）λ,v is investigated.

关键词： bipartite coherent-intermediate-entangled state IWOP technique classical transformation