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AF-Embedding of Crossed Products of Certain Graph C＊-algebras by Quasi-free Actions （II）

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Acta Mathematica Sinica,English Series 2011年第8期27卷 1581-1590页

作者： xiao Chun fang Department of Mathematics Tongji University Shanghai 200092 P. R. China

Let E be a row-finite directed graph, let G be a locally compact abelian group with dual group G = F, let w be a labeling map from E＊ to F, and let （C＊（E）, G,a^w） be the C＊-dynamical system defined by w. Some mappings concerning the AF-embedding construction of C＊（E） X（aw） G are studied in more detail. Several necessary conditions of AF-embedding and some properties of almost proper labeling map are obtained. Moreover it is proved that if E is constructed by attaching some l-loops to a directed graph T consisting of some rooted directed trees and G is compact, then oJ is k almost proper, that is a sufficient condition for AF-embedding, if and only if ∑j^Kk=1^wγ j ≠fi 1r for any loop γi, γ2 …γk attached to one path in T

关键词： AF-embedding crossed products graph C*-algebras

An Investigation on the Production of Random Copolymer with Monothiocarbonate and Trithiocarbonate Units over Cyclic Thiocarbonate via Metal-free Catalysis

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Chinese Journal of Chemistry 2020年第3期38卷 269-274页

作者： Jia-liang Yang Lan fang Hu xiao Han Cao Ying Wang Xing Hong Zhang MOE Key Llaborotory of Macromolecular Synthesis and Functionolizotion Department of Polymer Science and EngineeringZhejiang UniversityHangzhouZhejiang 310027China

Synthesis of poly(thiocarbonate)s from the copolymerization of epoxides and carbon disulfide(CS2)remains a tough challenge,due to inevitable oxygen-sulfur atom scrambling *** this work,we utilied the oxygen-sulfur exchange reaction(0-S ER)to synthesize a random copolymer with monothiocarbonate and trithiocarbonate units from CS2 and phenyI glycidyI ether(PGE)via metal-free Lewis *** copolymers contained monothiocarbonate and trithiocarbonate units of which the molar fraction could be tuned by va rying either the types of Lewis pairs or the reaction *** track on the intermediate provided an insight in the process of O-S ER and thus gave a hint to control the product *** and consumption of phenyl thioglycidyl ether was the key process to regulate the chain ***,the oxygen atoms of PGE could be excluded out of the chain,resulting in the nearly complete production of poly(trithiocarbonate)***,the refractive index of this kind of copolymer could be regulated in a wide range of 1.73-1.79(at 590 nm).

关键词： structure. temperature. process.

Protection of Carassius auratus Gibelio against infection by Aeromonas hydrophila using specific immunoglobulins from hen egg yolk

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2006年第11期7卷 922-928页

作者： LI xiao-liang SHUAI Jiang-bing fang Wei-huan Institute of Preventive Veterinary Medicine and Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine Zhejiang University Hangzhou 310029 China

Specific immunoglobulin (IgY) from egg yolk against Aeromonas hydrophila was produced by immunization of White Leghorn hens with formalin-killed whole cells of A. hydrophila. ELISA test using A. hydrophila as the coating antigen revealed that the specific antibody titer started to increase in the egg yolk at the 13th day post-immunization (P/N=2.18), reached the peak at the 56th day (P/N=13.82), and remained at high level until day 133 (P/N=7.03). The antibody was purified by saturated ammonium sulphate with a recovery rate of 63.5%. The specific IgY inhibited the growth of A. hydrophila at a concentration of 1.0 mg/ml during the 18 h incubation. Pre-treatment of polyploid gibel carps Carassius auratus Gibelio with specific IgY had a protection rate of 60% (6/10) against challenge with A. hydrophila, while none of the fishes in the control groups receiving sterile phosphate buffered saline (PBS) or non-specific IgY survived the challenge. Treatment of fishes with the specific IgY 4 h after the challenge also had lower mortality (70%, 7/10), a 30% reduction against the control PBS or non-specific IgY groups (10/10). These results indicate that specific IgY antibodies could be obtained easily from hens immunized with an inactivated A. hydrophila and could provide a novel alternative approach to control of diseases in fishes caused by this organism.

关键词： Aeromonas hydrophila Immunoglobulins Hen egg yolk Polyploid gibel carps Carassius auratus Gibelio

Enzyme-Induced Carbonate Precipitation for the Protection of Earthen Dikes and Embankments Under Surface Runoff: Laboratory Investigations

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Journal of Ocean University of China 2022年第2期21卷 306-314页

作者： HE Jia fang Changhang MAO Xunyu QI Yongshuai ZHOU Yundong KOU Hailei xiao liang Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering Hohai UniversityNanjing 210098China College of Engineering Ocean University of ChinaQingdao 266100China Department of Finance and Audit Army Logistics UniversityChongqing 401331China

Earthen structures such as shore protection dikes and river embankments easily suffer from erosion under surface water *** study made experimental efforts to explore the enzyme-induced carbonate precipitation(EICP)method for slope erosion control under surface runoff for earthen *** sandy soils were treated by the EICP method for various *** characteristics were evaluated by the surface penetration resistance,calcium carbonate content,and surface hard crust thickness of EICP-treated *** runoff erosion experiments were carried out to evaluate the erosion control performances of the EICP *** surface penetration resistance,calcium carbonate content,and surface hard crust thickness were found to significantly increase with the treatment *** the erosion experiments,it was observed that the level of damages decreased and the water flow volume required to trigger the damage increased with more *** increase in the soil slope angle led to more serious surface *** amount and rate that the soil particles were eroded from the slope surfaces declined with more EICP treatments,which was consistent with those of visual *** preliminary investigations presented in this study have shown the potential of the EICP method for slope erosion control under surface runoff for earthen structures.

关键词： enzyme-induced carbonate precipitation urease erosion soil slope

Relationship between powder characteristic and internal oxidation of Al in Cu-Al pre-alloyed powders

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Acta Metallurgica Sinica(English Letters) 2009年第1期22卷 71-80页

作者： Shuhua liang Xianhui WANG liang fang Zhikang FAN Department of Materials Science and Engineering Xi＇an University of Technology Xi＇an 710048 China State Key Laboratory for Mechanical Behavior of Materials Xi＇an Jiaotong University Xi＇an 710049 China

Since Cu-Al powder characteristics have important effects on the preparation of Cu/Al2O3 composite, the apparent activation energy of Al internal oxidation reaction in Cu-Al pre-alloyed powders with different characteristics was calculated in the present investigation. The microstructure and properties of the synthesized Cu/Al2O3 were studied. The results show that high-energy milling can obviously promote internal oxidation of Al in Cu-Al powders in the same solid solubility. At the same milling conditions and internal oxidation parameters, the solid solution of Al in Cu either in low or high amount will result in the poor microstructure and properties of the Cu/Al2O3 composite. Subsequently, when high-energy milling and internal oxidation are synchronously used to prepare the Cu/Al2O3 composite, there should be an appropriate solubility and milling effect for the pre-alloyed powders.

关键词： Powder characteristic Internal oxidation Cu/Al2O3 composite material Solid solution Reaction rate

Critical Temperature Characteristics of Layered High-Temperature Superconductor Under Pressure

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Communications in Theoretical Physics 2009年第4期51卷 761-764页

作者： liang fang-Ying Institute of Science and Technology for OPTO-Electronic Information of Yantai University Yantai 264005 China

We consider a Ginzburg-Landau modified model of layered high-temperature superconductor under pressure. We have theoretically studied the relation between the pressure and the temperature of layered high-temperature superconductor. If the pressure is not a constant, we have a relation of quadratic equation between the pressure and the temperature of layered high-temperature superconductor. In a special case, we find the critical temperature decreases with further increasing pressure. In another special ease, the critical temperature increases with further increasing pressure.

关键词： pressure effects transition temperature variations layered superconductor

Metabolomic profiling for identification of metabolites and relevant pathways for taurine in hepatic stellate cells

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World Journal of Gastroenterology 2017年第31期23卷 5713-5721页

作者： Xin Deng Xing-Qiu liang Fei-Guo Lu xiao-fang Zhao Lei Fu Jian liang Department of Infectious Diseases Ruikang Hospital Affiliated to Guangxi University of Chinese Medicine

AIM To develop a reliable and simple method to identify important biological metabolites and relevant pathways for taurine in hepatic stellate cells(HSCs), in order to provide more data for taurine *** All the biological samples were analyzed by using highperformance liquid chromatography-time electrospray ionization/quadrupole-time of flight mass spectrometry. Principal component analysis and partial least squares discriminant analysis were used to identify statistically different metabolites for taurine in HSCs, and metabolomic pathway analysis was used to do pathway analysis for taurine in HSCs. The chemical structure of the related metabolites and pathways was identified by comparing the m/z ratio and ion mode with the data obtained from free online *** A total of 32 significant differential endogenous metabolites were identified, which may be related to the mechanism of action of taurine in HSCs. Among the seven relevant pathways identified, sphingolipid metabolism pathway, glutathione metabolism pathway and thiamine metabolism pathway were found to be the most important metabolic pathways for taurine in *** This study showed that there were distinct changes in biological metabolites of taurine in HSCs and three differential metabolic pathways including sphingolipid pathway, glutathione pathway and thiamine metabolism pathway might be of key importance in mediating the mechanism of action of taurine in HSCs.

关键词： Natural taurine Hepatic stellate cells Pathway High performance liquid chromatographytime electrospray ionization/quadrupole-time of flight mass spectrometry Metabolomics

A differential game for cooperative target defense with two slow defenders

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Science China(Information Sciences) 2020年第12期63卷 269-271页

作者： Li liang fang DENG School of Automation Beijing Institute of Technology School of Information Engineering Inner Mongolia University of Science and Technology

Dear editor,Active defense is an effective way to improve battlefield survivability [1]. In the actual battlefield environment, equipment with weaker survivability usually needs a friendly platform to protect it from attacks. For example, important assets need to be protected by armed defense forces in the course of transportation to prevent them from being seized and destroyed by enemy forces.

关键词： Pursuit-evasion game Active defense Target-Attacker-Defender game Barrier Cooperate policy

An Exposure Meter of Lijiang Fiber-fed High-Resolution Spectrograph

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Research in Astronomy and Astrophysics 2023年第11期23卷 60-66页

作者： xiao-Guang Yu Kai-Fan Ji Xi-liang Zhang liang Chang Yun-fang Cai Ying Qin Zhen-Hong Shang Yunnan Observatories Chinese Academy of SciencesKunming 650011China Key Laboratory for the Structure and Evolution of Celestial Objects Chinese Academy of SciencesKunming 650216China University of Chinese Academy of Sciences Beijing 100049China Faculty of Information Engineering and Automation Kunming University of Science and TechnologyKunming 650500China

In 2016,an exposure meter was installed on the Lijiang Fiber-fed High-Resolution Spectrograph to monitor the coupling of starlight to the science fiber during *** on it,we investigated a method to estimate the exposure flux of the CCD in real time by using the counts of the photomultiplier tubes(PMT)of the exposure meter,and developed a piece of software to optimize the control of the exposure ***,by using flat-field lamp observations,we determined that there is a linear and proportional relationship between the total counts of the PMT and the exposure flux of the ***,using historical observations of different spectral types,the corresponding relational conversion factors were determined and obtained ***,the method was validated using actual observation data,which showed that all values of the coefficient of determination were greater than ***,software was developed to display the counts of the PMT and the estimated exposure flux of the CCD in real-time during the observation,providing a visual reference for optimizing the exposure time control.

关键词： telescopes instrumentation:spectrographs instrumentation:photometers