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Injective Cogenerators,Cotilting Modules and Cosilting Modules

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Acta Mathematica Sinica,English Series 2023年第9期39卷 1684-1700页

作者： Li Xin mao School of Mathematics and Physics Nanjing Institute of TechnologyNanjing211167P.R.China

It is well known that the concept of cotilting modules generalizes injective cogenerators and in turn,the concept of cosilting modules generalizes cotilting *** this paper,we further investigate the close connections among injective cogenerators,cotilting modules and cosilting modules from the viewpoint of morphism *** applications are also given.

关键词： Injective cogenerator cotilting module cosilting module morphism category

Nucleation and Growth Processes During Molecular-Beam Epitaxy of Ternary Compounds

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Chinese Physics Letters 1996年第11期13卷 855-858页

作者： mao Hui-bing Department of Materials Science Fudan UniversityShanghai 200433

In this letter the effect of the different migration rates of two kinds of cations on the nucleation and growth processes during molecular-beam epitaxy of ternary systems was studied in detail by Monte Carlo *** AlGaAs ternary system,in which the migration rate of cation Ga is larger than that of Al,there are three types of nucleation:Ga-Ga,Al-Ga and Al-Al,which show different characteristics in the growth processes.

关键词： ternary simulation Ternary

On a Supercongruence Conjecture of Z.-***

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Chinese Annals of Mathematics,Series B 2022年第3期43卷 417-424页

作者： Guo-shuai mao Department of Mathematics Nanjing University of Information Science and TechnologyNanjing 210044China

In this paper,the author partly proves a supercongruence conjectured by Z.-*** in *** p be an odd prime and let a∈Z^(+).Then,if p≡1(mod 3),[5/6p^(a)]∑k=0(2kk)/16^(k)≡(3/p^(a))(mod p^(2))is obtained,where(■)is the... 详细信息

关键词： Supercongruences Binomial coefficients Fermat quotient Jacobi symbol

Pressure-induced hydrogen-dominant high-temperature superconductors

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National Science Review 2024年第7期11卷 14-16页

作者： Ho-kwang mao Shanghai Advanced Research in Physical Sciences Center for High Pressure Science and Technology Advanced Research

Recent studies of hydrogen-dominant（superhydride） materials have led to putative discoveries of near-room temperature superconductivity at high pressures. The idea started more than half-a-century ago as a by-product of the quest for metallic hydrogen for which a natural consequence of its very high Debye temperature and phonon frequency due to the very low mass of the hydrogen atoms would lead to a high superconducting critical temperature （Tc） in weak coupling Bardeen-Cooper-Schrieffer（BCS） expression.

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Extraction and Crystal Structure of Karounidiol

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Chinese Journal of Structural Chemistry 2003年第4期22卷 431-434页

作者： CHAOZhi-mao WANGCheng InstituteofChineseMateriaMedica ChinaAcademyofTraditionalChineseMedicineBeijing100700China InstituteofMateriaMedica PekingUnionMedicalCollegeandChineseAcademyofMedicalSciencesBeijing100050China

The title compound of karounidiol (C30H48O2), a main active triterpene component of snakegourd seed, was isolated from unsaponifiable matter of the seed oil of Trichosanthes kirilowii Maxim., and characterized by X-ray diffraction analysis. It crystallizes in orthorhombic system, space group P212121 with C30H48O2CH3OHH2O (C31H54O4), a = 7.515(1), b = 14.407(1), c = 27.799(2) , V = 3009.8(5) 3, Z = 4, Dx = 1.087 g/cm3, Mr = 490.77, F(000) = 1088 and = 0.086 mm-1. The final R = 0.0840 and wR = 0.2289 for 2752 observed reflections (|F|2 ≥ 2|F|2). The molecular crystal structure of karounidiol shows relative stereochemistry of (3,13,14, 20)-3,29-dihydroxy-13-methyl-26-norolean-7,9(11)-diene. The molecule is composed of five six- membered rings with ring junctures of A/B trans, C/D trans and D/E cis.

关键词： karounidiol crystal structure Trichosanthes kirilowii triterpene

Proof of Two Supercongruences of Truncated Hypergeometric Series_(4)F_(3)

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Acta Mathematica Sinica,English Series 2024年第4期40卷 1015-1028页

作者： Guo Shuai mao Department of Mathematics Nanjing University of Information Science and TechnologyNanjing 210044P.R.China

In this paper,we prove two supercongruences conjectured by Z.-*** via the Wilf-Zeilberger *** of them is,for any prime p>3,4F3[7/6 1/2 1/2 1/2 1/6 1 1]-1/8]-1/2≡p(-2/p)+p^(3)/4(2/p)Ep-3 (mod p^(4))where(·/p)stands f... 详细信息

关键词： Supercongruence truncated hypergeometric series Wilf–Zeilberger method Euler numbers Legendre symbol

High-precision deformation monitoring algorithm for GBSAR system: rail determination phase error compensation

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Science China(Information Sciences) 2016年第8期59卷 204-219页

作者： Cheng HU mao ZHU Tao ZENG Weiming TIAN Cong mao Beijing Key Laboratory of Embedded Real-time Information Processing Technology Beijing Institute of Technology

In recent years, the repeat-pass GBSAR(ground based synthetic aperture radar) system has demonstrated its capacity to acquire deformation. Nevertheless, in a variety of applications, it needs to measure the deformation with the precision up to 0.1 mm, which could not be reached by utilizing the traditional PS(permanent scatterer) algorithm in most cases. Generally, one of the main reasons could be summarized into the phase error caused by the rail determination error, because the precision of rail determination might degrade during long working hours. However, the traditional PS algorithm could not compensate for the phase error caused by the rail determination error. In order to solve the problems, we modify the conventional PS ***, we deduced the transformation relationship between the rail determination error and its corresponding interferometric phase error. Then, the phase errors caused by the atmosphere and the rail determination error were jointly compensated. The experimental data, which were obtained in Fangshan District in Beijing(China), were used to test and verify the performance of the new algorithm. After the comparison between the results processed by the new algorithm and those processed by the traditional algorithm, the proposed method demonstrated its ability to obtain high-precision deformation.

关键词： permanent scatterer(PS) synthetic aperture radar(SAR) ground-based SAR deformation monitoring radar

Numerical analysis on phase change material melting process of a conical spiral tube energy storage tank

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Science China(Technological Sciences) 2024年第11期67卷 3413-3430页

作者： ZHAO Yuan mao QianJun School of Urban Construction Wuhan University of Science and TechnologyWuhan 430065China

Spiral tube heat exchangers have been widely used in phase change energy storage due to the compact structure and large heat transfer ***,this study numerically analyzes the effects of spiral tube diameter,number of rotations,and unsteady heat source on the melting process in conical spiral tube energy storage tanks using Fluent *** results indicate that when the tube diameter is increased from 8 to 11 mm and the number of rotations is increased from 5 to 8,the melting time is extended by 15.74%and 17.83%,*** energy storage capacity increases by 0.64%and 1.83%,*** average energy storage rate decreases by 13.05%and 13.58%,***,the sinusoidal wave heat source with small heat source periods has little effect on the melting process,while large heat source periods can significantly accelerate the *** the influence of amplitudes on the thermal storage performance under large heat source periods is more *** the heat source period is increased from 2 to 160 min and the amplitude is increased from 5 to 20 K,the melting time is reduced by 24.50%and 17.20%,*** total energy storage capacity decreases by 6.36%and increases by 1.62%,*** average energy storage rate increases by 24.03%and 22.74%,*** study provides guidance for the performance optimization of spiral tube phase change systems.

关键词： phase change material melting conical spiral tube periodic unsteady heat source

Micro-mixing in chemical reactors:A perspective

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Chinese Journal of Chemical Engineering 2017年第4期25卷 381-390页

作者： Zaisha mao Chao Yang Key Laboratory of Green Process and Engineering institute of Process Engineering Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Micro-mixing is an important mechanism, which works simultaneously with macro-mixing in chemical reactors in process industries, for achieving the best selectivity with respect to desired products. In about a half century, a huge amount of data and knowledge has been accumulated from theoretical and experimental studies on micromixing. Nevertheless, those results are mostly composites of simplified theoretical and empirical models, and the true nature of interactions of flow inhomogeneity and micro-mixing with chemical reaction has not been fully unveiled. This article reviews the progress in micro-mixing study in chemical reactors to date. A few important topics related to the nature, experimental evaluation, and numerical simulation of micro-mixing are *** suggestions are given hopefully to motivate more chemical engineers to devote their efforts to better understanding of micro-mixing in chemical reactors.

关键词： mixing simplified desired selectivity devote turbulence addressed accumulated reactant dispersed