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Particuology 2011年第6期9卷 589-597页

作者： Chao y. Ma Xue z. wang Institute of Particle Science and Engineering School of Process Environmental and Materials Engineering University of Leeds Leeds LS2 9JT UK

Near infrared spectroscopy.（NIR） is now probably.the most popular process analy.ical technology.（PAT） for pharmaceutical and some other industries. However, unlike mid-IR, NIR is known to have difficulties in monitoring cry.talliz.tion or precipitation processes because the existence of solids could cause distortion of the spectra. This phenomenon, seen as unfavorable previously. is however an indication that NIR spectra contain rich information about both solids and liquids, giving the possibility.of using the same instrument for multiple property.characteriz.tion. In this study. transflectance NIR calibration data was obtained using solutions and slurries of varied solution concentration, particle siz., solid concentration and temperature. The data was used to build calibration models for prediction of the multiple properties of both phases. Predictive models were developed for this challenging application using an approach that combines genetic algorithm （GA） and support vector machine （SVM）. GA is used for wavelength selection and SVM for mode building. The new GA-SVM approach is shown to outperform other methods including GA-PLS （partial least squares） and traditional SVM. NIR is thus successfully.applied to monitoring seeded and unseeded cooling cry.talliz.tion processes of L-glutamic acid.

关键词： Process analy.ical technology.Near infrared spectroscopy.Support vector machine Genetic algorithm Wavelength selection Cooling cry.talliz.tion

A method for analy.ing on-line video images of cry.talliz.tion at high-solid concentrations

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Particuology 2008年第1期6卷 9-15页

作者： Jian Wan Cai y. Ma Xue z. wang Institute of Particle Science and Engineering School of Process Environmental and Materials Engineering University of Leeds Leeds LS2 9JT UK

Recent research has demonstrated that on-line video imaging is a very.promising technique for monitoring cry.talliz.tion processes. The bottleneck in apply.ng the technique for real-time closed-loop control is considered as image analy.is that needs to be robust, fast and able to handle varied image qualities due to temporal variations of operating conditions such as mixing and solid concentrations. Image analy.is at highsolid concentrations turns out to be extremely.challenging because cry.tals tend to overlap or attach to each other and the boundaries between the cry.tals are usually.ambiguous. This paper presents an image segmentation algorithm that can effectively.deal with images taken at high-solid concentrations. The method segments cry.tals attached to each other along the mostly.related concave points on the contours of cry.tal blocks. The detailed procedure is introduced with application to cry.talliz.tion of L-glutamic acid in a hot-stage reactor.

关键词： Cry.talliz.tion High-solid concentrations Image processing Multi-scale segmentation Watershed segmentation Cry.tal siz. distribution

A novel scrape-applied method for the manufacture of the membrane-electrode assembly.of the fuel-cell sy.tem

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Acta Mechanica Sinica 2009年第6期25卷 831-837页

作者： S. D. Wu C. P. Chou R. G. Peng C. H. Lee y. z. wang Department of Mechanical Engineering National Chiao Tung University EE412 1001 Ta Hsueh RoadHsinchu 30010 Taiwan China Department of Chemical Engineering National YunlinUniversity of Science and Technology Yunlin China

This study.investigates the transfer of the scrape-applied method from the electrodes of a lithium battery.to the membrane-electrode assembly.of fuel cells, including Proton Exchange Membrane Fuel Cells and Direct Methanol Fuel Cell. Three methods are commonly.used to manufacture lithium battery.electrodes： the roller-applied method, the spray.ng-applied method, and the scrape-applied method. This study.develops novel scrape-applied equip- ment for lithium battery.electrodes. This method is novel and suitable for producing fuel cell, better than other tradi- tional methods. In this study. the stability.of coating process was tested by.measuring the weight and thickness of a dry.electrode. The stability.and reproducibility.of electrode fab- rication were examined by.sy.tematic data analy.is. Finally. the study.used a specially.designed single cell composed of 16 conductive segments, which are insulated locally. The current passing through each segment was measured using Hall Effect sensors connected to the segment compartments. Based on the measured distribution of the local current in a segmented single cell, the influence of flooding and stoi- chiometry.variation of feed gas was discussed in terms of electrochemical reaction rate. The experimental results serve as an important basis for future research in this field, which hold potential benefits to the academia and the industry.

关键词： Fuel cells . Scraper . Electrode. Lithium battery.- Reliability

Effects of Tensor Interaction on Pseudospin Energy.Splitting and Shell Correction

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IMP & HIRFL Annual Report 2011年第1期 26-27页

作者： Dong Jianmin z.o Wei Gu Jianz.ong y. z. wang Cao Ligang X. z. z.ang China Institute of Atomic Energy Beijing China.

A HOMOTOPy.METHOD OF SWITCHING SOLUTION BRANCHES AT THE PITCHFORK BIFURCATION POINT

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Journal of Computational Mathematics 2001年第3期19卷 299-308页

作者： Cong, y.-H. z.u, z.-y. College of Mathematical Sciences Shanghai Teachers University Shanghai 200234 China

Provides information on a study.which proposed a continuation method for switching solution branches at a pitchfork point. Problem of the standard pitchfork; Information on the sy.tems of equations; Numerical examples... 详细信息

关键词： homotopy.method switching solution branches pitchfork point

LOW Cy.LE FATIGUE BEHAVIOR OF Az.1HP ALLOy.IN AS HIGHP RESSURE DIE CASTING

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Acta Metallurgica Sinica(English Letters) 2000年第4期13卷 961-966页

作者： Liu, z. Xu, y.y. wang, z.G. wang, y. Liu, z.y. Inst of Metal Research Chinese Acad of Sciences Shenyang China

Fully.reversed total strain-controlled low-cy.le fatigue tests were conducted at room temperature in air to study.the fatigue behavior of Az.1HP magnesium alloy.in as high pressure die casting and subsequently.heat treatment. All the specimens in different heat histories exhibit cy.lic strain hardening in different degrees. It is difficult to distinguish the fatigue behavior of the die casting specimens from that of the solution aging specimens. The solution treated specimens show longer fatigue life at high strain amplitude and shorter fatigue life at low strain amplitude than the die casting and solution aging specimens though they.have the lowest y.eld strength with higher strain hardening. Fatigue fracture surfaces for strain amplitude larger than 0.005 show very.similar to those found by.monotonic tensile tests. The SEM examination reveals that the regions of fatigue crack growth and final fracture can be characteriz.d by.quasi-cleavage mechanisms, but some shallow dimples, slip bands and secondary.cracks are found on the fracture surface in the fracture crack growth areas.

关键词： Cracks Die casting Fatigue of materials Heat treatment

Measurement, modelling, and closed-loop control of cry.tal shape distribution： Literature review and future perspectives

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Particuology 2016年第3期14卷 1-18页

作者： Cai y. Ma Jing J. Liu Xue z. wang Institute of Particle Science and Engineering School of Chemical and Process Engineering University of Leeds Leeds 1.52 9JT United Kingdom School of Chemistry.and Chemical Engineering South China University of Technology Guangzhou 510640 China

Cry.tal morphology.is known to be of great importance to the end-use properties of cry.tal products, and to affect down-stream processing such as filtration and dry.ng. However, it has been previously.regarded as too challenging to achieve automatic closed-loop control. Previous work has focused on controlling the cry.tal siz. distribution, where the siz. of a cry.tal is often defined as the diameter of a sphere that has the same volume as the cry.tal. This paper reviews the new advances in morphological population balance models for modelling and simulating the cry.tal shape distribution （CShD）, measuring and estimating cry.tal facet growth kinetics, and two- and three-dimensional imaging for on-line characterisation of the cry.tal morphology.and CShD. A framework is presented that integrates the various components to achieve the ultimate objective of model-based closed-loop control of the CShD. The knowledge gaps and challenges that require further research are also identified.

关键词： Cry.tal morphology.Cry.tal shape distribution Morphological population balance mode3D process imaging Closed-loop control of cry.tal shapeCry.tal facet growth kinetics

Numerical Modeling and Analy.is of Grooved Surface Applied to Film Cooling

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Journal of Bionic Engineering 2011年第4期8卷 464-473页

作者： L. Guo z. C. Liu y. y. y.n z. W. Han Faculty.of Engineering University of Nottingham Nottingham NG7 2RD UK Department of Internal Combustion Engine Jilin University Changchun 130022 P. R. China Key.Laboratory.of Bionic Engineering （Ministry.of Education China） Jilin University Changchun 130022 P. R. China

In order to improve the efficiency.of film cooling, numerical investigation was carried out to study.the effects of different film-cooled plates on surface heat transfer. Both grooved and non-grooved surfaces were concerned. The modeling was per- formed using Fluent software with the adoption of Shear-Stress Transport （SST） k-ωmodel as the turbulence closure. The coolant was supplied by.a single film cooling hole with an inclination angle of 30°. The Mach numbers for the coolant flow and the mainstream flow were fixed at 0 and 0.6, respectively. At three blowing ratios of 0.5, 1.0 and 1.5, the aerody.amic behaviour of the mixing process as well as the heat transfer performance of the film cooling were presented. The numerical results were validated using experimental data extracted from a benchmark test. Good agreements between numerical results and the ex- perimental data were observed. For the film cooling efficiency. it shows that both local and laterally.averaged cooling effectiveness can be improved by.the non-smooth surface at different blowing ratios. Using the grooved surface, the turbulence intensity.upon the plate can be reduced notably. and the mixing between the two flows is weakened due to the reduced turbu lence level. The results indicate that the cooling effectiveness of film cooling can be enhanced by.apply.ng the grooved surface.

关键词： film cooling non-smooth surface cooling effectiveness grooved structure blowing ratio

Decoloriz.tion of Direct Black 22 by. Aspergillus ficuum

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Journal of Environmental Sciences 2001年第4期13卷 472-475页

作者： Dong, X.-j. Du, z.-y. Chen, z. Dept. of Biology.Environmental Sci. Wenzhou Normal College Wenzhou 325003 China

The decoloriz.tion of Direct Black 22 by.Aspergillus ficuum has been studied. It was found that Aspergillus ficuum could effectively.decoloriz. Direct Black 22 especially.when grown as pelleted my.elia. Results showed that the media containing Direct Black 22 at 50 mg/L could be decoloriz.d by.98.05% of the initial color in 24 h. The optimum pH and temperature of decoloriz.tion are 4.0 and 33 °C respectively. Aeration was quite beneficial to decoloriz.tion. Medium composition and the concentration of Direct Black 22 could affect the rate of decoloriz.tion. The dy. degraded products assay.d by.UV-visible spectrophotometer and macroscopic observation showed that the decoloriz.tion of Direct Black 22 by.my.elial pellets includes two important processes: bioadsorption and biodegradation. The degradation experiment agree with the Michaelis-Menten kinetics equation.

关键词： Bioassay Biodegradation Color Concentration (process) Dy.s pH Ultraviolet spectrophotometers

New breakthrough:Building non-markovian environments for single-qubit sy.tems at any.time interval

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Science China(Phy.ics,Mechanics & Astronomy. 2025年

作者： H. z. Shen Center for Quantum Sciences and School of Phy.ics Northeast Normal University

The proposal of quantum simulation provides a highly.effective approach for experimental research on open quantum sy.tems. To date, numerous quantum simulation studies pertaining to open quantum sy.tems have been put forward,including Fanchini et al.’s simulation of a dephasing noise channel utiliz.ng an optical sy.tem[1], and Xiong et al.’s realiz.tion of a quantum simulation for a non-rotating-wave approximation noise channel, also leveraging an optical sy.tem[2].

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