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2009 9th International Conference on Electronic Measurement & Instruments（ICEMI’2009）

作者： Zhihua Li Henli Song Department of Mechanic and Electronic Information China University of Geosciences wuhan 430074 China

The shallow seismograph is the main instruments of engineering geophysics. Its key technique lies in how to resolve the problem of the signal dynamic scope（ requested 120 dB） because the signal is very weak. To solve the problem instrument designers used two kinds of essential techniques: one is instantaneous Floating amplification technology, another is 24bitA/Ds of - technique. However Floating amplification technology can cause signal no-line distortion and 24bit A/ Ds of - technique acquisition rate is slow, so these technology can not resolve the problem of the signal dynamic scope efficiently . The advanced virtual instrument technologies have been introduced into the development of the seismograph in this design. We use virtual instrument technology to achieve instantaneous floating-point to enlarge the dynamic range of signals in the shallow seismic acquisition. Compared with the traditional Floating amplification based on high-performance processors, the hardware system of control and data acquisition completed by the data acquisition card and virtual instrument software - LabVIEW, does not require any external processor. The software can achieve a seamless connection, the system’s structure and acquisition timing. So greatly simplified and enhanced the design of shallow seismograph .

关键词： Seismograph Floating amplification Virtual Instrument Data Acquisition LabVIEW.

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An Algorithm for Solving the Path Avoiding Obstructions Based on Guotao Algorithm

An Algorithm for Solving the Path Avoiding Obstructions Base...

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智能计算及其应用国际会议

作者： DAI Guangming GONG Chen DU Anhong (Department of Computer Science China University of Geosciences wuhan 430074 China)

Guotao Algorithm (GT) is a kind of high-efficient algorithm which solves traveling salesman problem (TSP). After comparing the differences between solving the path avoiding obstructions and TSP, GT is

关键词： Guotao algorithm Genome Database path avoiding obstructions

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Revenue-Maximizing Pricing and Resource Allocation in a Multi-Service Network

Revenue-Maximizing Pricing and Resource Allocation in a Mult...

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2003 International Conference on Communication Technology

作者： Xie Xiaochun Dept. of Electronics and Information Huazhong University of Science and Technology wuhan (430074) HuBei P.R.China Wang Xiaoyan Dept. of Electronics and Information Huazhong University of Science and Technology wuhan (430074) HuBei P.R.China

In this article, we consider how to allocate network resource among the service in different classes based on Nash equilibrium model and Stackelberg model. After getting the optimal prices of each ser

关键词： Pricing Multi-Service Resource Allocation

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Inflation Transmission Diagnostics via a Bayesian Graph Vector Autoregressive Model with Markov Switching

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Journal of Systems Science & Complexity 2024年

作者： FU Jiali CAI Fengjing WU Jinran ZHAO Shangrui WANG You-Gan 1.College of Mathematics and Physics, Wenzhou University 2.Institute for Positive Psychology and Education, Australian Catholic University 3.School of Science, wuhan University of Technology 4.School of Mathematics and Physics, The University of Queensland College of Mathematics and Physics Wenzhou University Institute for Positive Psychology and Education Australian Catholic University School of Science Wuhan University of Technology School of Mathematics and Physics The University of Queensland

The transmission of inflation is a widespread occurrence, and managing inflationary pressures is a crucial macroeconomic challenge. Although inflation is a typical macroeconomic variable,its contemporaneous and lagged causal relationships have not been thoroughly investigated, which could result in missing important policy insights. The Bayesian graph vector autoregression(BGVAR)model can identify contemporaneous and lagged causal relationships among economic variables, but it lacks practical research on inflationary inflation. To account for the structural transformation in the inflation transmission process, the authors propose a Bayesian graph vector autoregressive model with Markov switching(MS-BGVAR), which considers both regime switching and contemporaneous causality among macroeconomic variables. The proposed study focuses on analyzing the dynamics of inflation transmission relationships among G7 countries under different regimes, as these countries represent developed nations. The authors use inflation data from 1971–2019, which shows two distinct inflation regimes within the sample period. The authors conduct simulation experiments to generate moderately dimensional simulated data for both regimes and indicators, demonstrating the theoretical reliability of the proposed model in accurately identifying graph structures. Finally, the authors apply the proposed model to identify structural breaks and causal transmission relationships in the inflation transmission process of G7 economies, demonstrating that the proposed model has significant economic significance and good explanatory power in the selected target countries.

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Damage Identification in Beam Structures Based on Mechanical Impedance Characters

Damage Identification in Beam Structures Based on Mechanical...

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2004安全科学与技术国际会议

作者： WANG Dansheng & ZHU Hongping (School of Civil Engineering & Mechanics Huazhong University of Science and Technology wuhan 430074 Hubei China)

It is very important to analyze the vibration characters and to identify the damage of cracked structures. In this paper, the effects of a transverse surface crack on mechanical impedance of simple su

关键词： mechanical impedance rotational spring model cracked beam damage identification.

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The Evolution Trend of Optical Core Network

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China Communications 2008年第1期5卷 4-8页

作者： Mao Qian wuhan Research Institute of Posts and Telecommunications,Hubei, wuhan, 430074 China wuhan Research Institute of Posts and Telecommunications Hubei Wuhan 430074 China

Optical network is the infrastructure of telecommunicationnetwork. More than 95% of information istransported over optical network in China, wherecore network is the main trunk. How to increase thebit rate of the single wavelength channel, raise thetotal capacity of the DWDM system, extend theoptical transportation distance of electrical repeaterfree of the DWDM system and optical network intelligenceare key problems demanding high attention.The evolution trend of the optical core network isdescribed with some examples in this paper.

关键词： optical core network DWDM UHS ULC ULH ASON

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Two-Dimensional Harmonics Retrieval in the Complex Noise Based on Genetic Algorithm

Two-Dimensional Harmonics Retrieval in the Complex Noise Bas...

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智能计算及其应用国际会议

作者： WU Sunyong1 LI Hongwei1 XUE Qiutiao1 YANG Qiuwei 2 (1.School of Mathematics and Physics China University of Geosciences wuhan 430074 China) (2.Information Secutity Lab Computer Science Institution Huazhong University of Science & Technology wuhan 430074 China)

In this paper, the problem of two-dimensional(2-D) harmonics retrival in multiplicative and additive noise is studied from the view point of 2-D cyclostationary process. According to the properties th

关键词： harmonic retrieval genetic algorithm cyclic statistics multiplicative noise

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Error Analysis and Precision Verification of a CMM Probe

Error Analysis and Precision Verification of a CMM Probe

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第三届国际仪器科学技术学术研讨会

作者： YANG Lian-gen a XIE Tie-bang b aSchool of Mechanical Engineering Hubei Polytechnic University wuhan Hubei 430068 China bSchool of Mechanical Science and Engineering Huazhong University of Science and Technology wuhan 430074 China

Probe is one of the key techniques of CMM and NC-copying process. A CMM probe that may be used for NC-copying process is proposed based on the work requirements of probes of NC-copying process. The co

关键词： error analysis precision verification CMM probe copying-process

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Space Vector Modulated Matrix Converter under Abnormal Input Voltage Conditions

Space Vector Modulated Matrix Converter under Abnormal Input...

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2009 IEEE 6th International Power Electronics and Motion Control Conference-ECCE Asia

作者： Hongwu She Hua Lin Xingwei Wang and Song Xiong College of Electrical and Electronic Engineering Huazhong University of Science and Technology wuhan 430074 Hubei Province China

An improved space vector modulation （SVM） approach for matrix converter （MC） operation in unbalanced and non-sinusoidal input voltage condition was presented. The concept of modulation vector was introduced, and the relationship of output voltage and input voltage of MC by space vector denotation was deduced. Using the modulation vector approach, an improved SVM approach was proposed to improve the output performance of MC in abnormal input voltage conditions. The novel approach was based on dynamic control of the output voltage modulation vector respect to the instantaneous input voltage vector. By this method, the unbalanced and non-sinusoidal input voltages could be automatically compensated without any extra calculation so the output voltage could keep balanced and sinusoidal in expected value. The validity of the improved SVM approach was verified by simulation and experiments.

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考虑回收质量风险的钢铁闭环供应链决策

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武汉理工大学学报（信息与管理工程版） 2024年第1期46卷 102-108页

作者：王海燕陈武汉福州大学经济与管理学院福建福州350108

为探讨回收质量风险对钢铁闭环供应链成员决策、主体利润水平的影响,建立了有无回收质量风险两种情形下制造商主导的博弈模型,求解得出最优决策,并进行对比分析。研究结果发现:回收质量风险的存在并不影响废钢资源的回收价格、钢铁制造... 详细信息

为探讨回收质量风险对钢铁闭环供应链成员决策、主体利润水平的影响,建立了有无回收质量风险两种情形下制造商主导的博弈模型,求解得出最优决策,并进行对比分析。研究结果发现:回收质量风险的存在并不影响废钢资源的回收价格、钢铁制造商回收成本系数对闭环供应链的决策影响,但会影响生产成本对闭环供应链的决策影响,体现在钢铁的基本市场规模的阈值上;回收质量风险的存在会导致钢铁制造商制定更高的批发价,钢铁的市场价格更高,市场需求更少,钢铁制造商利润、钢铁分销商利润和供应链系统利润都有所降低。

关键词：废钢回收回收质量风险 Stackelberg博弈钢铁供应链定价决策

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