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A Calorimeter for Measuring the Enthalpy of Solution of Solid Solutes in Supercritical Fluids and Study on CO2-Naphthlene System

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chinese Chemical Letters 2001年第1期12卷 79-80页

作者： xiao Gang ZHANG, Guang Ying YANG , Bu Xing HAN*, Xi Feng ZHANG, Hai Ke YAN Center for Molecular sciences, institute of chemistry, the chinese academy of sciences, beijing 100080 chinese Acad Sci Inst Chem Ctr Mol Sci Beijing 100080 Peoples R China

An apparatus for measuring the enthalpy of solution of solids in supercritical fluids (SCFs) was constructed. The enthalpy of solution (ΔH) of naphthalene in supercritical (SC) CO2 was measured at 308.15 K in the pressure range from 8~11 MPa. It was found that ΔH was negative in the pressure range from 8 to 10 MPa, and the absolute value of ΔH decreases with increasing pressure. However, ΔH became positive at the pressures higher than 10 MPa. This unusual phenomenon can be explained by clustering between CO2 and naphthalene.

关键词： Solution enthalpy supercritical fluid molecular interaction

Control of Melt Structures on Cu-Au Mineralization in Basic-Ultrabasic Complexes of Northern china

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Acta Geologica Sinica(English Edition) 2000年第4期74卷 786-794页

作者： YUAN Wanming institute of High Energy Physics, chinese academy of sciences, beijing 100080and MO Xuanxue china University of Geoscienses, beijing 100083 institute of High Energy Physics Chinese Academy of Sciences Beijing 100080 china University of Geoscienses Beijing 100083 [?]3Yuan Wanming Born in April 1956 graduated from Hebei College of Geology in 1982. He was once engaged in teaching in Hebei College of Geology for many years and acquired M.Sc and Ph.D degrees in petrology at china University of Geosciences (Wuhan) and china University of Geosciences (beijing) in 1989 and 1997 respectively. Dr. Yuan now works with the institute of High Energy Physics Chinese Academy of Sciences doing postdoctoral research work. His interests are mainly nuclear techniques and their applications to geology. E-mail: panm@***.

Based on systematic analyses of 72 samples of different basic-ultrabasic rocks, the present paper discusses the relationship between melt structure and Cu and Au mineralization. It is found that if the NBO/T, NBO, M2+, FeO and MgO values are relatively high and the T, M3+, Fe2O3 and CaO values are low the basic-ultrabasic melt will be favourable to Cu (Ni) mineralization, but if the former are low and the latter are high it is favourable to Au metallization. Cu ions occupy dominantly octahedra in basic-ultrabasic melt and the higher the NBO/T, NBO and M2+ values, the more the octahedra in the melt. Au element mainly takes the form of Au+ ions in basic-ultrabasic melt and the Au+ ions constitute tetrahedral sites together with Fe3+ ions. Therefore, low M2+ and high Fe3+, i.e. high oxygen fu-gacity, can promote the enrichment of Au+ ions and Au mineralization. Components NT (other than Au+), Al2O3 and SiO2 in basic-ultrabasic melt have no effect on metallogenetic species. As mentioned above, in relevant diagrams distribution areas of the characteristic values of ore-free melt and those of ore-forming melt are overlapped in different degrees, which possibly indicates that not all the magmas have mineralizing ability. It can be well distinguished whether basic-ultrabasic rocks are favourable to Cu or Au mineralization or they are just ore-free rocks by analysing integrated diagrams of the characteristic values of the magmatic melt structure.

关键词： melt structure Cu-Au mineralization basic-ultrabasic complex

High Throughput SNP Genotyping with Two Mini-sequencing Assays

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Acta Biochimica et Biophysica Sinica 2004年第6期36卷 379-384页

作者： Chunqing LUO1,2#, Libin DENG1#, and Changqing ZENG1,2* The institute of Genetic and Developmental Biology, the chinese academy of sciences, beijing 100101, china 2beijing Genomics institute, the chinese academy of sciences, beijing 101300, china The institute of Genetic and Developmental Biology the Chinese Academy of SciencesBeijing 100101 China beijing Genomics institute the Chinese Academy of SciencesBeijing 101300 China

Two mini-sequencing methods, FP-TDI (template-directed dye-terminator incorporation with fluorescence-polarization) and MassArray (matrix assisted laser desorption ionization time of flight detection mass spectrometry), were optimized. A numeric standard was introduced to evaluate the SNP scoring quality of FP-TDI assay, thus made the optimization work easier. At the same time, using multi-PCR technology, 8-plex genotyping of MassArray assay was successfully carried out, some softwares were developed and the data process of MassArray was highly automated. Then these two methods were applied to high throughput SNP genotyping, the accuracy, efficiency and robustness were compared. The result shows FP-TDI is more sensitive to the concentration of SNPprimer and PCR product, as well as extension cycles, the SNPprimer length of FP-TDI should be 24–30 bp long, whereas MassArray assay prefers to be as short as only 16 *** 6440 SNP sites of human chromosome 3 were genotyped in a sample of 90 individuals, 4792 sites by FP-TDI assay and 1648 sites by MassArray assay, the success rates of FP-TDI and MassArray were 67.7% and 93.6% respectively. The throughput of MassArray was higher than FP-TDI, and the cost of MassArray was lower, MassArray was more suitable for high throughput SNP genotyping.

关键词： SNP genotyping FP-TDI MassArray high throughput

APPROXIMATION ALGORITHM FOR MAX-BISECTION PROBLEM WITH THE POSITIVE SEMIDEFINITE RELAXATION

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Journal of Computational Mathematics 2003年第3期21卷 357-366页

作者： Da-chuan Xu Ji-ye Han(institute of Applied Mathematics, academy of Mathematics and System sciences, chinese academyof sciences, beijing 100080, china) institute of Applied Mathematics Academy of Mathematics and System Sciences Chinese Academy of Sciences 北京 100080

Using outward rotations, we obtain an approximation algorithm for Max-Bisection problem, i.e., partitioning the vertices of an undirected graph into two blocks of equal cardinality so as to maximize the weights of crossing edges. In many interesting cases, the algorithm performs better than the algorithms of Ye and of Halperin and Zwick. The main tool used to obtain this result is semidefinite programming.

关键词： Approximation algorithm Max-Bisection problem Semidefinite programming Approximation ratio.

Application of asymptotic waveform approximation technique to hybrid FE/BI method for 3D scattering

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Science in china(Series F) 2007年第1期50卷 124-134页

作者： PENG Zhen1,2,3 & SHENG XinQing2 1 institute of Electronics, chinese academy of sciences, beijing 100080, china 2 Department of Electronic Engineering, beijing institute of Technology, beijing 100081, china 3 Graduated University of chinese academy of sciences, beijing 100039, china 1. institute of Electronics Chinese Academy of Sciences Beijing 100080 China 2. Department of Electronic Engineering Beijing Institute of Technology Beijing 100081 China 3. Graduated University of chinese academy of sciences Beijing 100039 China

The asymptotic waveform evaluation （AWE） technique is a rational function approximation method in computational mathemetics, which is used in many appllcations in computational electromagnetlca. In this paper, the performance of the AWE technique in conjunction with hybrid finite element/boundary integral （FE/BI） method is firstly Inveetlgeted. The formuletlon of the AWE applied in hybrid FE/BI method is given in detail. The characteristic implementation of the application of the AWE to the hybrid FE/BI method is discussed. Numarlcel results demonstrate that the AWE technique can greatly speed up the hybrid FE/BI method to acquire wide-band and wide-angle backecatter radar-cross-section （RCS） by complex targets.

关键词： hybrid FE/BI AWE electromagnetic scattering RCS

Local Properties of Cardinal Interpolatory Function

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Acta Mathematica Sinica,English Series 2001年第4期17卷 613-620页

作者： Han Lin CHEN Si Long PENG institute of Mathematics, academy of Mathematics and System sciences chinese academy of sciences, beijing 100080, P. R. china Nadec, institute of Automation, Academia Sinica, beijing. 100080. china institute of Mathematics Academy of Mathematics and System Sciences Chinese Academy of Sciences Beijing 100080 P. R. China

In [1], a kind of periodic cardinal interpolatory function (PCIF) is constructed, and they also use it to construct periodic wavelets. But the localizationl of PCIF is not known yet. In this paper, we studv the local property of PCIF using two different methods. The results show that PCIF has very good localization. Some new properties of Bernoulli spline are also introduced.

关键词： Periodic cardinal interpolatory function Local Spline

Benzoylation of benzene and substituted benzenes catalyzed by superacid ZrO_2:H_2SO_4

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chinese Journal of chemistry 1993年第5期11卷 452-456页

作者： JIA,Cheng-Guo HUANG,Mei-Yu JIANG,Ying-Yan institute of chemistry,chinese academy of sciences,beijing 100080 institute of chemistry Chinese Academy of Sciences Beijing 100080

Superacid ZrO_2:H_2SO_4 showed high activity in Friedel-Crafts benzoylation of benzene and substituted benzenes such an chlorobenzene,toluene and 1,3,*** in 90-100% yields were obtained with catalytic amount of superacid ZrO_2:H_2SO_*** calcination temperature greatly influenced the acid strength and activity of the superacid ZrO_2:H_2SO_*** superacid has both Lewis and Bronsted acid *** reversibility of Friedel-Crafts benzoylation and transacylation were observed over the *** used superacid could be readily regenerated and showed identical benzoylation activity to toluene.

关键词： Zr Benzoylation of benzene and substituted benzenes catalyzed by superacid ZrO2 SO

Unsteady Numerical Simulation of Hot Streak/Blades Interaction and Film Cooling

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Journal of Thermal Science 2010年第5期19卷 402-409页

作者： Weilin Yi,Lucheng Ji and Yunhan xiao Research Center for Energy and Power,chinese academy of sciences,beijing,china Key Laboratory of Advanced Energy and Power,chinese academy of sciences,(institute of Engineering Thermophysics),beijing,china P.O.Box 2706,beijing 100190,china Research Center for Energy and Power Chinese Academy of Sciences Beijing China Key Laboratory of Advanced Energy and Power Chinese Academy of Sciences (Institute of Engineering Thermophysics) Beijing China beijing China

Deeply research on management and application of hot streak is an important way to breakthrough technique obstacle of aero engine hot *** method is a useful instrument to investigate the correlative *** the paper developed independently three dimensional unsteady parallel computational code-MpiTurbo based on Fortran 90 and MPI at Linux operating *** unsteady numerical simulation was carried out to investigate impacts of the factors,which included circumferential locations of hot streak and clocking positions of blade rows,on the thermal environment of a 1+1 counter-rotating *** results clearly indicated that clocking positions of hot streak/blade row and blade row/blade row had great influence on the time-averaged temperature distribution of the third blade ***,it can be effective for improving thermal environment of turbine to optimize blade parameters and clocking *** film cooling layout was designed by the repetitious steady simulation based on source term *** the flow structure detail was given by the unsteady simulation.

关键词： hot streak turbine parallel computation film cooling

Lattice Boltzmann model for the perfect gas flows with near-vacuum region

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Communications in Nonlinear Science and Numerical Simulation 2000年第2期5卷 58-63页

作者： Guangwu YAN and Li YUAN (LSEC, institute of Computational Mathematics, academy of Mathematics and System sciences,chinese academy of sciences, beijing 100080, china Department of Mathermatics, Jilin University, Changchun 130023, china) LSEC Institute of Computational Mathematics Academy of Mathematics and System Sciences Chinese Academy of Sciences Beijing 100080 China Department of Mathematics Jilin University Changchun 130023 China

It is known that the standard lattice Boltzmann method has near-vacuum limit,i. e., when the density is near zero, this method is invalid. In this letter, we propose a shople lattice Boltzmann model for one-dimensional fiows. It possesses the ability of simulating near vacuum area by setting a limitation of the relaxation factor. Thus, the model overcomes the disadvantage of non-physical pressure and the density. The numerical examples show these results are satisfactory.

关键词： lattice Boltzmann method perfect gas near-vacuum region Roe’s tests