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Petroleum Science 2008年第1期5卷 20-23页

作者： Yang Minghui Liu Chiyang tang xuan Zheng Xiaofeng Basin ＆ Reservoir Research Center Key Laboratory of Hydrocarbon Accumulation Ministry of Education ChinaUniversity of Petroleum Beijing 102249 China Department of Geology Northwest University Xi＇an 710069 Shaanxi China Department of Energy Geology China University of Geosciences Beijing 100083 China

The carbon isotope δ 13C value of dispersed organic matter in the Upper Triassic sediments in the Ordos basin is （-24.5 to -26.6） ×10^-3 with the carbon being derived from C3-1ike pleustons. The paleoclimate of the Late Triassic, especially during the deposition of the Chang 7 member, was characterized by a hot and humid climate. It underwent four small climate cycles from humid and warm to humid and hot.

关键词： Paleoclimate stable carbon isotope dispersed organic material Yanchang Formation Ordos basin

WEB SERVICES COMPOSING BY MULTIAGENT NEGOTIATION

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Journal of Systems Science & Complexity 2008年第4期21卷 597-608页

作者： Jian tang Liwei ZHENG Zhi jin Institute of Mathematics Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100190 China Graduate School of the Chinese Academy of Sciences Beijing 100049 China. Institute of Mathematics Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100190 China Institute of Computing Technology Beijing 100190 China.

Composing web services is gained daily attention in Service Oriented Computing. It includes the dynamic discovery, interaction and coordination of agent-based semantic web services. The authors first follow Function Ontology and Automated Mechanism Design for service agents aggregating. Then the problem is formulated but it is ineffective to solve it from the traditional global view. Because the complexity is NP-complete and it is dii^cult or even impossible to get some personal information. This paper provides a multi-agent negotiation idea in which each participant negotiates under the condition of its reservation payoff being satisfied. Numerical experiment is given and well evaluates the negotiation.

关键词： Feasible coalition multi-agent systems negotiation web services composing.

Numerical Studies on the Generation and Propagation of Tsunami Waves Based on the High-Order Spectral Method

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China Ocean Engineering 2022年第2期36卷 268-278页

作者： HAO Jian LI jin-xuan LIU Shu-xue WANG Lei State Key Laboratory of Coastal and Offshore Engineering Dalian University of TechnologyDalian 116024China

An effective numerical model for wave propagation over three-dimensional(3D)bathymetry was developed based on the High-Order Spectral(HOS)method and combined with a moving bottom *** on this model,tsunami waves caused by various mechanisms were simulated and ***-dimensional bed upthrust and the effect of the uplift velocity of the bathymetry on the wave profiles of tsunami waves were ***,tsunami waves caused by 3D submarine slides were generated and the effects of the slide velocity,slide dimension and water depth on the tsunami waves were *** on wavelet analysis,the properties of the tsunami wave propagation were *** results show that the bottom movement can significantly affect the generation and propagation of tsunami waves and the studies could help understand the mechanisms of tsunamis caused by a moving bottom boundary.

关键词： tsunami waves High-Order Spectral(HOS)method moving bottom boundary wavelet analysis

Mesenteric adipose tissue B lymphocytes promote intestinal injury in severe acute pancreatitis by mediating enteric pyroptosis

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Hepatobiliary & Pancreatic Diseases International 2024年第3期23卷 300-309页

作者： Qing Huang Jia-Wen Liu Hai-Bin Dong Zheng-Jie Wei jin-Zhe Liu Yu-tang Ren xuan Jiang Bo Jiang Department of Gastroenterology Beijing Tsinghua Changgung HospitalSchool of Clinical MedicineTsinghua UniversityBeijing 102218China

Background:Visceral adipose tissue(VAT)has been linked to the severe acute pancreatitis(SAP)prognosis,although the underlying mechanism remains *** has been reported that pyroptosis worsens *** present study aimed to verify whether mesenteric adipose tissue(MAT,a component of VAT)can cause secondary intestinal injury through the pyroptotic ***:Thirty-six male Sprague Dawley(SD)rats were divided into six different *** rats were randomly divided into the SAP and control *** monitored the changes of MAT and B lymphocytes infiltration in MAT of SAP *** SAP rats were injected with MAT B lymphocytes or phosphate buffer solution(PBS).The remaining twelve SAP rats were first injected with MAT B lymphocytes,and then with MCC950(NLRP3 inhibitor)or *** collected blood and tissue samples from pancreas,gut and MAT for ***:Compared to the control rats,the SAP group showed inflammation in MAT,including higher expression of tumor necrosis factor(TNF-α)and interleukin-6(IL-6),lower expression of IL-10,and histological *** cytometry analysis revealed B lymphocytes infiltration in MAT but not T lymphocytes and *** SAP rats also exhibited intestinal injury,characterized by lower expression of zonula occludens-1(ZO-1)and occludin,higher levels of lipopolysaccharide and diamine oxidase,and pathological *** expression of NLRP3 and n-GSDMD,which are responsible for pyroptosis,was increased in the intestine of SAP *** injection of MAT B lymphocytes into SAP rats exacerbated the inflammation in *** upregulation of pyroptosis reduced tight junction in the intestine,which contributed to the SAP progression,including higher inflammatory indicators and worse histological *** administration of MCC950 to SAP+MAT B rats downregulated pyroptosis,which subsequently improved the intestinal barrier and ameliorated inflammatory response of ***:In SAP,MAT B lymphocytes aggravated local

关键词： Acute pancreatitis Mesenteric adipose tissue B lymphocyte Intestinal barrier Pyroptosis

Characterization of the Topological Features of Catalytic Sites in Protein Coevolution Networks

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Chinese Physics Letters 2020年第6期37卷 127-131页

作者： Xiu-Lian Xu jin-xuan Shi School of Physics Science and Technology Yangzhou UniversityYangzhou 225002China

The knowledge of sequence and structural properties of residues in the catalytic sites of enzymes is important for understanding the physiochemical basis of enzymatic *** reveal new features of the catalytic sites by analyzing the coevolutionary behavior of amino acid *** performing direct coupling analysis of the sequences of homologous proteins,we construct the coevolution networks at the residue *** on the analysis of the topological features of the coevolution networks for a dataset including 20 enzymes,we show that there is significant correlation between the catalytic sites and topological features of protein coevolution *** at the catalytic center often correspond to the nodes with high values of centralities in the networks as characterized by the degree,betweenness,closeness,and Laplacian *** results of this work provide a possible way to extract key coevolutionary information from the sequences of enzymes,which is useful in the prediction of catalytic sites of enzymes.

关键词： evolution networks catalytic

A multi-class large margin classifier

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第2期10卷 253-262页

作者： Liang tang Qi xuan Rong XIONG Tie-jun WU Jian CHU Institute of Cyber-Systems and Control Zhejiang University Hangzhou 310027 China

Currently there are two approaches for a multi-class support vector classifier(SVC). One is to construct and combine several binary classifiers while the other is to directly consider all classes of data in one optimization formulation. For a K-class problem(K>2),the first approach has to construct at least K classifiers,and the second approach has to solve a much larger op-timization problem proportional to K by the algorithms developed so far. In this paper,following the second approach,we present a novel multi-class large margin classifier(MLMC). This new machine can solve K-class problems in one optimization formula-tion without increasing the size of the quadratic programming(QP) problem proportional to K. This property allows us to construct just one classifier with as few variables in the QP problem as possible to classify multi-class data,and we can gain the advantage of speed from it especially when K is large. Our experiments indicate that MLMC almost works as well as(sometimes better than) many other multi-class SVCs for some benchmark data classification problems,and obtains a reasonable performance in face recognition application on the AR face database.

关键词： Multi-classification Support vector machine (SVM) Quadratic programming (QP) problem Large margin

Synthesis and Characterization of Fully-Functionalized Polysilanes for Photorefractive Materials

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Chinese Chemical Letters 2000年第8期11卷 675-676页

作者： tang, HD jin, JG Wuhan Univ Dept Chem Wuhan 430072 Peoples R China

Hydrogen-containing polysilanes and chromophore-containing polysilanes are prepared by traditional Wurtz coupling and subsequent hydrosilylation. They are characterized by (HNMR)-H-1, FT-IR, UV/VIS spectroscopies, dif... 详细信息

关键词： polysilanes synthesis characterization Wurtz coupling hydrosilylation

Measurement of absolute three-dimensional displacement gradients using tri-color quad-beam digital shearography

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Optoelectronics Letters 2023年第8期19卷 487-492页

作者： LI xuan WU Sijin tang Xiaojun LI Weixian School of Instrumentation Science and Opto-electronics Engineering Beijing Information Science and Technology UniversityBeijing 100192China Beijing Spacecrafts China Academy of Space TechnologyBeijing 100094China

A tri-color quad-beam digital shearography is proposed to achieve the measurement of absolute three-dimensional(3D) displacement *** laser beams with three different center wavelengths are symmetrically irradiated to the object surface from the upper and lower left and right *** phase maps are then extracted from the two interferograms obtained from two *** on these four phase maps,the absolute 3D displacement gradients are *** means of absolute 3D displacement gradient measurement effectively improves the measurement capability of digital shearography and expands its application range.

关键词： shearography absolute displacement

Rare earth elements(lanthanum,cerium and erbium)doped black oxygen deficient Bi_(2)O_(3)-Bi_(2)O_(3-x) as novel photocatalysts enhanced photocatalytic performance

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Journal of Rare Earths 2022年第7期40卷 1053-1062页

作者： jin tang Zhili Chen Xiaolong Yu Walter Ztang College of Environmental Science and Engineering Guilin University of TechnologyGuilin 541006China Department of Civil and Environmental Engineering Florida International UniversityMiamiFL33174USA Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control School of Environmental Science and EngineeringGuangdong University of Petrochemical TechnologyMaoming 525000China

Novel black oxygen deficient bismuth oxide(Bi_(2)O_(3)-Bi_(2)O_(3-x))photocatalytic material was successfully prepared by a two zone temperature controlled muffle furnace *** lanthanum,cerium and erbium ions are successfully doped into Bi_(2)O_(3)-Bi_(2)O_(3-x) with the average contents of 10.77 wt%,7.62 wt%and 8,14 wt%,*** re sults show that a large number of oxygen vacancies exist in Bi_(2)O_(3)-Bi_(2)O_(3-x).La^(3+)Ce^(3+)and Er^(3+)act as electron acceptors to temporarily trap the photo-generated *** XPS spectrum show Bi-O band in Bi_(2)O_(3)-Bi_(2)O_(3-x) and the O 1s peak of Ce/Bi_(2)O_(3)-Bi_(2)O_(3-x) move toward the direction of low binding *** phenomena fully prove that the separation of photogenerated electron-hole pairs will be more effectual,so as to reduce the possibility of charge carrier *** radical scavenging experiments and electron spin resonance detections confirm that the conduction band of the original Bi_(2)O_(3)can easily receive photogenerated electrons,while the valence band of the modified Bi_(2)O_(3)-Bi_(2)O_(3-x) tends to accept photogenerated holes and then forms the circulation ***,Ce/Bi_(2)O_(3)-Bi_(2)O_(3-x) can degrade tetracycline hydrochloride up to 90.15%.This research provides some new insights into developing green and recyclable photocatalysts for the remediation of antibiotic contamination.

关键词： Oxygen deficient Rare earth doping Photocatalysis Degradation mechanism Tetracycline hydrochloride

Rare earth permanent magnets prepared by hot deformation process

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Chinese Physics B 2018年第11期27卷 71-91页

作者： Ren-Jie Chen Ze-xuan Wang Xu tang Wen-Zong Yin Chao-Xiang jin jin-Yun Ju Don Lee A-Ru Yan CAS Key Laboratory of Magnetic Materials and Devices Ningbo Institute of Material Technology and Engineering Chinese Academy of SciencesNingbo 315201China University of Dayton DaytonOHUSA

Hot deformation is one of the primary methods for fabricating anisotropic rare earth permanent ***,rapidly quenched powder flakes with a nanocrystal structure are condensed into fully dense isotropic precursors using the hot-pressing *** prepared isotropic precursors are then hot-deformed to produce high-anisotropy uniaxial bulk rare earth permanent magnets and a highly textured structure is produced via this *** resulting magnets possess many advantages such as near-net-shape,outstanding corrosion resistance,and ultrafine-grain *** influence of the preparation parameters utilized in the hot-pressing and deformation processes on the magnetic properties and microstructure of the permanent magnets are systemically summarized in this *** a near-net-shape technique,the hot deformation process has notable advantages with regard to the production of irregular shapes,especially for radially oriented ringshaped magnets with high length-diameter ratios or thin *** difficulties associated with the fabrication of crack-free,homogeneous,and non-decentered ring-shaped magnets are substantially resolved through an emphasis on mold design,adjustment of deformation parameters,and application of theoretical *** the characteristics of hotdeformed magnets which include grain shape and size,anisotropic distribution of intergranular phases,etc.,investigation and improvement of the mechanical and electric properties,in addition to thermal stability,with the objective of improving the application of hot-deformed magnets or ring-shaped magnets,is of practical significance.

关键词： hot deformation Nd-Fe-B permanent magnets high coercivity nanocomposite radially oriented Nd-Fe-B ring magnet