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Time -Sharing Power Supply Optimal Decision forElectrolytic Deposition Process of Zinc Based onSimulated Annealing Algorithm

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Journal of Systems Engineering and Electronics 2000年第4期11卷 43-50页

作者： Huang Taisong Gui Weihua Wang Yalin Yang Chunhua College of Information Engineering Central South University of TechnologyChangsha 410083 P. R. China

According to time-sharing valuation principle (TSVP) of power supply, the relationships of current density and current efficiency at different acidities are obtained based on the processed data of electrolytic deposition process of zinc (EDPZ) with the least square method (LSM). Thus an optimal model of time-sharing power supply system for EDPZ is established, which has been optimized by use of an improved efficient simulated annealing algorithm (SAA). Practical results show that industrial and mining enterprises can obtain enormous economic benefits every year.

关键词： Algorithms Current density Electrodeposition least squares approximations Mathematical models Optimization Simulated annealing

Determination of Crystal Structure of Britholite-Y

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Journal of Rare Earths 1994年第2期12卷 130-137页

作者：张建洪方泽廖立兵 China Univ of Geosciences Beijing China

Britholite-Y is milkwhite, rosy in colour. The measured specific gravity is 4.35, with Ng′ = 1.791, Np′ = 1.784. As determined by electron microprobe, its crystal formula is (Y2.82Ca1.58Ce0.27Dy0.21Er0.11)5 [(Si2.95P0.05)3O12](OH,F), space group = C22-P21, a = (0.9504±0.0005) nm, b = (0.9414±0.0004) nm, c = (0.6922±0.0002) nm, r = (119.71±0.04)°, V = (53.79±0.04) nm3, Z = 2. least-squares refinements with 2272 independent reflection (F0>3σ|F0|) yielded R = 0.111. The change of symmetry group P63/m of apatite to P21 of britholite-Y results from the shifts of Y, Ca, Si, O and (OH) atoms (anions) from the pseudohexagonal P63/m equivalent positions (6h), (4f), (12i) and (2a) as produced by distortion of the polyhedra with 7-, 9-, and 4-corners. The substitution of Ca in apatite for Y and the order distribution of atoms Y and Ca on the equivalent positions (6h) and (4f) have contributed to the distortion of 7- and 9- cornered polyhedra. The substitutions of Si4+ for P5+ and OH- for F- may also be effected. The crystal chemistry of apatite-group minerals is also discussed.

关键词： Composition Crystal structure Density (specific gravity) least squares approximations Rare earth compounds Spectroscopic analysis

Measurement of borneol based on infrared spectrometry

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Chinese Optics Letters 2005年第2期3卷 116-118页

作者：谷筱玉汪曣孙惠丽徐可欣 State Key Laboratory of Precision Measuring Technology and Instruments Tianjin University Tianjin 300072

The infrared spectrometry contains multiple information of the sample, and it is easy to be applied to online measurement. To Chinese medicine, this technology can improve the standard of quality control and accelerate the modernization course. In this paper, we investigate the spectral characteristics of borneol, an effective ingredient in many Chinese medicines. The following results are achieved. In middle infrared （MIR） region, utilizing the linear relationship between absorption and concentration, the concentration of borneol with relative error within 4.30% in the strongest absorption region （2950-2970 cm^-1） is measured; in near infrared （NIR） region, the predicted concentrations of borneol are calculated by using partial least squares （PLS） regression analysis, in which the wavelengths are selected by genetic algorithm （GA） from the absorption bands of borneol in NIR region. The predicted relative error of calibration model is less than 2%. This result shows that PLS regression analysis combining genetic algorithm is a good method to improve prediction and reduce data in NIR region.

关键词： Calibration Genetic algorithms least squares approximations Medicine Quality control Standards

Crystallite Orientation Analysis for a Multidirectionally Cold Rolled α-Ti Alloy (TA7) Thin Sheet

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Rare Metals 1989年第2期9卷 31-36页

作者： Zuo, Liang Liang, Zhide Xu, Jiazhen Zhao, Xiang Northeast Univ of Technology China

A microcomputer software determining the crystallite orientation distribution functions (ODFs) and inverse pole figures of hexagonal materials with or without orthorhombic physical symmetry has been worked out the first time. The texture measurements and the ODF calculations were performed for a multidirectionally cold rolled α-Ti alloy (TA7) sheet by the application of this software. It is shown that the rolling planes of most grains in the sheet tend to be parallel to (0001) with a deviation to the extent of 40° and is shown a predominance of the orientation zone containing (1016), while the rolling directions are, as a whole, uniformly distributed along all the directions over the rolling planes. Of all the texture components, (2ˉ117) [01ˉ10] is slightly stronger than the other.

关键词： Computer Programming Flowcharting Crystals Orientation Mathematical Techniques least squares approximations Metallography Textures Titanium Metallography Computer Simulation

Modelling of the Relaxation least squares-Based Neural Networks and Its Application

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Journal of Systems Engineering and Electronics 2002年第2期13卷 16-21页

作者： Lu Kongkuo, Chen Zengqiang & Yuan ZhuzhiDepartment of Automation, Nankai University, Tianjin 300071, P.R.China(Received July 5, 2001) Department of Automation Nankai University Tianjin 300071 P.R. China

A relaxation least squares-based learning algorithm for neual networks is proposed. Not only does it have a fast convergence rate, but it involves less computation quantity. Therefore, it is suitable to deal with the case when a network has a large scale but the number of training data is very limited. It has been used in converting furnace process modelling, and impressive result has been obtained.

关键词： Backpropagation Learning systems least squares approximations

Inverse Design of Electron Lens

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Journal of Systems Engineering and Electronics 2001年第1期12卷 49-52页

作者： Tu Yan & Zhong Xuefei Electronics Research Institute, Southeast University, Nanjing 210096, P. R. China Electronics Research Institute Southeast University Nanjing 210096 P. R. China

The inverse design of electron lens is realized by two different methods in this paper. One is damped least square method and the other is the artificial neural network method. Their merits and defects are discussed according to our calculation results in the paper. In the condition of selecting the learning samples properly, the artificial neural network has obvious advantages in the inverse design of electron lens. It is an effective method to solve the inverse design problem in the electron optic system.

关键词： Electron optics least squares approximations Neural networks Numerical methods Optical design

New algorithm and system for measuring size distribution of blood cells

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Chinese Optics Letters 2004年第6期2卷 343-346页

作者：姚翠萍李政张镇西 Key Laboratory of Biomedical Information Engineering of Ministry of Education P. R. China and Institute of Biomedical Engineering School of Life Science and Technology Xi'an Jiaotong University Xi'an 710049 Key Laboratory of Biomedical Information Engineering of Ministry of Education P. R. China and Institute of Biomedical Engineering School of Life Science and Technology Xi'an Jiaotong University Xi'an 710049n optical scattering particle sizing a numerical transform is sought so that a particle size distribution can be determined from angular measurements of near forward scattering which has been adopted in the measurement of blood cells. In this paper a new method of counting and classification of blood cell laser light scattering method from stationary suspensions is presented. The genetic algorithm combined with nonnegative least squared algorithm is employed to inverse the size distribution of blood cells. Numerical tests show that these techniques can be successfully applied to measuring size distribution of blood cell with high stability.

In optical scattering particle sizing, a numerical transform is sought so that a particle size distribution can be determined from angular measurements of near forward scattering, which has been adopted in the measurement of blood cells. In this paper a new method of counting and classification of blood cell, laser light scattering method from stationary suspensions, is presented. The genetic algorithm combined with nonnegative least squared algorithm is employed to inverse the size distribution of blood cells. Numerical tests show that these techniques can be successfully applied to measuring size distribution of blood cell with high stability.

关键词： Genetic algorithms least squares approximations Light scattering Numerical methods Particle size analysis

The method to evaluate the position error in graphic positioning technology

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Chinese Optics Letters 2004年第9期2卷 528-530页

作者：卢慧卿王宝光刘力双李亚标 StateKeyLaboratoryofPrecisionMeasuringTechnologyandInstruments TianjinUniversityTianjin300072

In the measurement of automobile body-in-white, it has been widely studied to position the twodimensional (2D) visual sensors with high precision. In this paper a graphic positioning method is proposed, a hollow tetrahedron is used for a positioning target to replace all the edges of a standard automobile body. A 2D visual sensor can be positioned through adjusting two triangles to be superposed on a screen of the computer, so it is very important to evaluate the superposition precision of the two triangles. Several methods are discussed and the least square method is adopted at last, it makes the adjustment more easy and intuitive with high precision.

关键词： Automobile bodies Graphic methods Laser applications least squares approximations Position measurement Sensors Two dimensional

STUDY OF C_D, C_M, C_L AND WAVE FORCES ON PIPE LINES NEAR THE OCEAN BOTTOM

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China Ocean Engineering 1990年第4期5卷 409-420页

作者： Xing, Zhizhuang Sun, Shaosu Hu, Yuxia Dalian Univ of Technology Dalian China

The wave forces on pipes near the ocean bottom are studied with model test in this paper. Comparisons of four different methods show that the uncommonly used method - least Square Mass (LSM) is the most stable one. The in-line and transverse forces on the pipe, which is placed at various distances from the bottom of the wave tank, are measured. The force transfer coefficients (CD, CM, CL) are much larger when the pipe is near the bottom than when it is free. But the coefficients do not increase unlimitedly: they reach their maxima at ζ (gap ratio = e / D) = 0.1 (gap ratio ζ = e / D). An interesting result is that the ratio of lift force frequency (f′L) to wave frequency (fw) is 2.0. In the paper, the curves of coefficients are given.

关键词： Mathematical Techniques least squares approximations Water Waves Mathematical Models