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Comparison Properties for Asymptotically Tracially Approximation C^(*)-algebras

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Acta Mathematica Sinica,English Series 2023年第5期39卷 863-884页

作者： Qing zhai fan Xiao Chun fanG College of Education Shanghai Jian Qiao UniversityShanghai 201306P.R.China Department of Mathematics Shanghai Maritime UniversityShanghai 201306P.R.China Department of Mathematics Tongji UniversityShanghai 200092P.R.China

We show that the following properties of the C*-algebras in a class P are inherited by simple unital C*-algebras in the class of asymptotically tracially in P :(1) n-comparison,(2) α-comparison(1 ≤ α < ∞).

关键词： C*-algebras asymptotically tracially approximation Cuntz semigroup

A Class of C^(*)-Algebras with Non-stable K_1-Group Property

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Acta Mathematica Sinica,English Series 2012年第5期28卷 983-988页

作者： Qing zhai fan Xiao Chun fanG Department of Mathematics Shanghai Maritime University Department of Mathematics Tongji University

In this paper, we give a class of C＊-algebras with non-stable K1-group property which include the example non-simple tracial topological rank zero and stable rank two C＊-algebra given by Lin and Osaka.

关键词： C*-Algebras stable rank non-stable

Building　up　Multi－Layered　Perceptrons　as　Classifier　System　for　Decision　Support

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Journal of Systems Engineering and Electronics 1995年第2期6卷 32-39页

作者： Cat Jun, zhai fan & Feng Shan (Inst. of Sys. Eng., Huazhong University of Science and Technology, Wuhan 430074, China) Inst. of Sys. Eng. Huazhong University of Science and Technology Wuhan 430074 China

This paper focuses on some application issues in ***-layered perceptrons researches. The following problem areas are discussed: (1) the classification capability of multi-layered perceptrons; (2) theself-configuration algorithm for facilitating the design of the neural nets' structure;and,finally (3) the application of the fast BP algorithm to speed up the learning procedure. Some experimental results with respect to the application of multi-layered perceptrons as classifier systems in the comprehensive evaluation of Chinese large cities are presented.

关键词： Multi-layered perceptron Decision support system Classification ability Self-configuration Comprehensive evaluation.

Dissecting Human Gonadal Cell Lineage Specification and Sex Determination Using A Single-cell RNA-seq Approach

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Genomics, Proteomics & Bioinformatics 2022年第2期20卷 223-245页

作者： Rui Wang Xixi Liu Li Li Ming Yang Jun Yong fan zhai Lu Wen Liying Yan Jie Qiao Fuchou Tang Biomedical Pioneering Innovation Center Department of Obstetrics and GynecologyThird HospitalSchool of Life SciencesPeking UniversityBeijing 100871China Beijing Advanced Innovation Center for Genomics and Center for Reproductive Medicine Third HospitalPeking UniversityBeijing 100191China Academy for Advanced Interdisciplinary Studies Peking UniversityBeijing 100871China Key Laboratory of Assisted Reproduction and Key Laboratory of Cell Proliferation and Differentiation Ministry of EducationBeijing 100191China Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproductive Technology Beijing 100191China Peking-Tsinghua Center for Life Sciences Peking UniversityBeijing 100871China

Gonadal somatic cells are the main players in gonad development and are important for sex determination and germ cell ***,using a time-series single-cell RNA sequencing(scRNA-seq)strategy,we analyzed fetal germ cells(FGCs)and gonadal somatic cells in human embryos and *** analysis of testes and ovaries revealed several novel cell subsets,including POU5F1^(+)SPARC^(+)FGCs and KRT19^(+) somatic ***,our data indicated that the bone morphogenetic protein(BMP)signaling pathway plays cell type-specific and developmental stage-specific roles in testis development and promotes the gonocyte-to-spermatogonium transition(GST)in late-stage testicular mitotic arrest ***,testosterone synthesis function transitioned from fetal Sertoli cells to adult Leydig cells in a stepwise *** our study,potential interactions between gonadal somatic cells were systematically explored and we identified cell type-specific developmental defects in both FGCs and gonadal somatic cells in a Turner syndrome embryo(45,XO).Our work provides a blueprint of the complex yet highly ordered development of and the interactions among human FGCs and gonadal somatic cells.

关键词： Human gonad scRNA-seq Turner syndrome Leydig-Sertoli cell-cell interaction Gonocyte-tospermatogonium transition

Characterization and functional analysis of hsp18.3 gene in the red flour beetle, Tribolium castaneum

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Insect Science 2019年第2期26卷 263-273页

作者： Jia Xie Xing-Xing Hu Meng-fan zhai Xiao-Juan Yu Xiao-Wen Song Shan-Shan Gao Wei Wu Bin Li Jiangsu Key Laboratory for Biodiversity and Biotechnology College of Life Sciences Nanjing Normal University Nanjing China

Small heat shock proteins (sHSPs) are diverse and mainly function as molecular chaperones to protect organisms and cells from various stresses. In this study, hsp 18.3, one Tribolium castaneum species-specific shsp、has been identified. Quantitative real-time polymerase chain reaction illustrated that Tchsp 18.3 is expressed in all developmental stages, and is highly expressed at early pupal and late adult stages, while it is highly expressed in ovary and fat body at the adult period. Moreover, it was up-regulated 4532 ± 396-fold in response to enhanced heat stress but not to cold stress;meanwhile the lifespan of adults in ds-Tchsp 18.3 group reduced by 15.8% from control group under starvation. Laval RNA interference (RNAi) of Tchsp 18.3 caused 86.1%±4.5% arrested pupal eclosion and revealed that Tchsp 18.3 played an important role in insect development. In addition, parental RNAi of Tchsp 18.3 reduced the oviposition amount by 94.7%. These results suggest that Tchsp 18.3 is not only essential for the resistance to heat and starvation stress, but also is critical for normal development and reproduction in T. castaneum.

关键词： development reproduction stress Tchspl8.3 Tribolium castaneum

Thermostable α-Diimine Nickel Complexes with Substituents on Acenaphthequinone-backbone for Ethylene Polymerization

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Chinese Journal of Polymer Science 2020年第11期38卷 1214-1220,I0007页

作者： Rui-fang Zhang Yan-Hui Hou Xu-Ling Wei Ding-Ding Zhao Mi-Mi Cui Fei-fan zhai Xiang-Liu Li Bin-Yuan Liu Min Yang Hebei Key Laboratory of Functional Polymers Tianjin Key Laboratory of Chemical Process SafetyInstitute of Polymer Science and EngineeringHebei University of TechnologyTianjin 300130China State Key Laboratory of Separation Membranes and Membrane Processes School of Material Science and EngineeringTiangong UniversityTianjin 300160China Lanzhou Petrochemical Research Center Petrochemical Research Institute of CNPCLanzhou 730060China

In order to promote the thermostability of a-diimine nickel complex by ligand backbone structure,a series of α-diimine nickel complexes with substituents on acenaphthequinone backbone were synthesized and used as catalysts for ethylene *** the hydroxyethyl phenoxyl group was introduced to the acenaphthequinone-backbone,the thermal stability and activity of the catalyst could be significantly *** catalytic activity of complex C2[5-(4-(2-hydroxyethyl)phenoxyl)-N,N-bis(2,6-diisopropyl)acenaphthylene-1,2-diimine]nickel(Ⅱ)dibromide with isopropyl substituents on N-aryl reached 8.2×10^6g/(molNi·h)at 70℃and 2 *** activity of[5-(4-(2-hydroxyethyl)phenoxyl)-N,N-bis(2,6-dibenzhydryl-4-menthylphenyl)acenaphthylene-1,2-diimine]nickel(Ⅱ)dibromide(C3)still maintained at 6.7×10^5 g/(molNi·h)at 120℃.Compared with C3 containing bulky dibenzhydryl substituents,the activity of C2 was sensitive to the change of the polymerization ***,the polyethylenes obtained from complex C3 had lower branching ***,the molecular weight could reach 971 kg/mol,which is almost 5 times as much as that of the polyethylene obtained from complex C2.

关键词： α-Diimine nickel Ethylene polymerization Thermostability Ligand backbone structure

Gut bacterium promotes host fitness in special ecological niche by affecting sugar metabolism in Drosophila suzukii

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Insect Science 2023年第6期30卷 1713-1733页

作者： Huan-Huan Gao Shan Zhao Rui-Juan Wang Dong-Yun Qin Peng Chen An-Sheng Zhang Qian-Ying Zhuang Yi-fan zhai Xian-Hong Zhou Institute of Plant Protection Shandong Academy of Agricultural SciencesJinanChina Shandong Academy of Grape JinanChina

As an important fruit pest of global significance,Drosophila suzukii occupies a special ecological niche,with the characteristics of high sugar and low protein *** niche differs from those occupied by other fruit-damaging Drosophila *** bacteria substantially impact the physiology and ecology of ***,the contribution of gut microbes to the fitness of *** in their special ecological niche remains *** this study,the effect of Klebsiella oxytoca on the development of *** was examined at physiological and molecular *** results showed that,after the removal of gut microbiota,the survival rate and longevity of axenic *** decreased *** of *** to the midgut of *** advanced the development level of *** differentially expressed genes and metabolites between axenic and ***-reintroduced *** were enriched in the pathways of carbohydrate *** advancement was achieved through an increased glycolysis rate and the regulation of the transcript level of key genes in the glycolysis/gluconeogenesis *** oxytoca is likely to play an important role in increasing host fitness in their high-sugar ecological niche by stimulating the glycolysis/gluconeogenesis *** a protein source,bacteria can also provide direct nutrition for ***,which depends on the quantity or biomass of *** result may provide a new target for controlling *** by inhibiting sugar metabolism through eliminating the effect of *** and thus disrupting the balance of gut microbial communities.

关键词： carbohydrate metabolism Drosophila suzuki glycolysis/gluconeogenesis Klebsiella oxytoca symbiotic bacteria

Preparation of Lignin Based Anion Exchanger for Nitrate and Phosphate Removal

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Paper And Biomaterials 2016年第1期1卷 22-30页

作者： fan zhai Zhen Wang Yu Liu Key Laboratory of Pulp & Paper Science and Technology Ministry of EducationQilu University of Technology Key Laboratory of Cleaner Production and Industrial Waste Recycling and Resourcization Ministry of EducationQilu University of Technology

Tertiary amino alkali lignin( TA-AL) was successfully synthesized by a two-step approach; its application as an adsorbent for nitrate and phosphate ions in effluents was investigated. TA-AL was characterized by FT-IR,zeta potential,SEM,and elemental analysis. Kinetic and equilibrium adsorption isotherms were determined to investigate the adsorption capacity of TAAL. The results revealed that TA-AL had a very strong adsorption capacity towards anions; the value of p HPZC( PZC,point of zero charge) was about 9. *** adsorption of nitrate and phosphate ions was related to effluent p H and initial anion concentration. The maximum absorption of nitrate and phosphate ions was about 26. 9 and 18. 4 mg / g when the initial concentration of the ions was 50 mg / L. The adsorption kinetics conformed to the pseudo-second-order kinetic equation,and the equilibrium data were suitably expressed by the Freundlich model. The regeneration studies confirmed that the lignin-based material was a promising adsorbent for nitrate and phosphate ions in water.

关键词： aminated alkali lignin phosphate nitrate adsorption

On intelligent Cooperative System

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Journal of Systems Engineering and Electronics 1995年第3期6卷 7-10页

作者： Li Tong zhai fan Li Yan & Fend Shan(Department of ACE, Huazhong University of Science and Technology, Wuhan 430074, China) Department of ACE Huazhong University of Science and Technology Wuhan 430074 China

The paper presents our research efforts motivated by the apparent need to combine conventional,preexisting computing functions with novel knowledge--based functions. This has been likened to what occurred in the evolution of primates, where the 'new brain' (the cortex) was added to, layered upon, and given control over the 'old brain' common to the less complex animals.

关键词： Knowledge-based systems(KBS) Autonomous decision-making components Knowledge processing Cooperative system