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Tunneling of Dirac Particles from Kaluza-Klein Black Hole

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Communications in Theoretical Physics 2009年第5期51卷 849-852页

作者： ZENG xiao-xiong LI Qiang Department of Physics and Engineering Technology Sichuan University of Arts and Science Dazhou 635000 China

Applying the fermions tunneling method, proposed by Kerner and Mann recently, we discuss the tunneling characteristics of Dirac particles from the stationary Kaluza-Klein black hole. To choose Gamma matrix conveniently and avoid the ergosphere dragging effect, we perform it in the dragging coordinate frame. The result shows that Hawking temperature in this case also can be reproduced by the general Dirac equation.

关键词： Hawking radiation Dirac particles tunneling Kaluza Klein black hole

Graphene-Coated 1D MoTe_2 Nanorods as Anode for Enhancing Lithium-Ion Battery Performance

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Chinese Journal of Structural Chemistry 2022年第8期41卷 18-24页

作者： Shuwei Chai xiong xiao Yabei Li Changhua An Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion School of Chemistry and Chemical Engineeringand Tianjin Key Laboratory of Advanced Functional Porous MaterialsInstitute for New Energy Materials&Low-Carbon TechnologiesTianjin University of Tech-nologyTianjin 300384China

One-dimensional nanostructures(1D)with short ion diffusion distance and fast ion transport path are excellent for lithium-ion batteries(LIBs). However, the nature of layered transition metal dichalcogenides makes it difficult to form 1D nanohybrids. Here, the MoTe_(2) nanorods with an average diameter of 100-200 nm and length of 1-3 μm encapsulated by reduced graphene oxide(MoTe_(2)/rGO) have been fabricated via in-situ reaction of GO coated Mo_3O_(10)(C_(2)H_(10)N_(2)) nanowires with Te under Ar/H_(2) atmosphere. When applied as anode of LIBs, the Mo Te_(2)/r GO delivers a high reversible capacity(637 m A h g^(-1) after 100 cycles at 0.2 A g^(-1)), good rate capability(374 m A h g^(-1) at 2 A g^(-1)) and excellent stability(360 m A h g^(-1) after 200 cycles at 0.5 A g^(-1)), which surpasses bare Mo Te2 nanorods and bulk Mo Te2 crystallite. Furthermore, a lithium-ion full cell constructed by coupling Mo Te2/r GO anode and LiCoO_(2) cathode shows a capacity of 105 m A h g^(-1) at 0.1 C. The enhanced performance mainly benefits from the advantages of 1D nanostructure, and meanwhile the r GO thin layers are able to improve the conductivity and maintain the structural stability. This work provides a simple pathway for the synthesis of 1D TMDs nanostructures for energy storage and conversion.

关键词： MoTe_2 nanorods graphene lithium ion battery

Two New Lanostane-type Triterpenoids from Mulgedium tataricum

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Chinese Chemical Letters 2006年第2期17卷 204-206页

作者： xiao xiong WANG Zhong Jian JIA College of Chemistry and Chemical Engineering National Laboratory of Applied Organic Chemistry Lanzhou University Lanzhou 730000

Two new triterpenoids, lanost-9（11）, 23Z（24）-dicnc-3β, 25-diol （1） and lanost-9（11）, 25- diene-3β, 24-diol （2） were isolated from Mulgedium tataricum L. Their structures wcrc elucidated by spectral methods.

关键词： Mulgedium tataricum Compositae lanostane-type triterpenoid.

Investigations into the thermal non-equilibrium of W UMa-type contact binaries

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Research in Astronomy and Astrophysics 2018年第5期18卷 83-92页

作者： xiao xiong Liang Liu Sheng-Bang Qian Yunnan Observatories Chinese Academy of Sciences Kunming 650011 China Key Laboratory of the Structure and Evolution of Celestial Objects Chinese Academy of Sciences Kunming 650216 China Center for Astronomical Mega-Science Chinese Academy of Sciences Beijing 100101 China University of Chinese Academy of Sciences Beijing 100049 China

Traditionally, some physical details（e.g., magnetic braking, energy transfer, angular momentum loss, etc.） have to be taken into consideration during investigations into the evolution of contact binaries. However, the real evolutionary processes which usually contain several of these physical mechanisms are very complicated as a result of strong interaction between components. To avoid dealing with these factors, a linear relationship is applied to the temperatures of components. It is found that the higher the mass ratio（M2/M1） of a contact system, the weaker the deviation from thermal *** this basis, a variation trend of fill-out factor（f） changing with mass ratio can be inferred, which is consistent with observations. Moreover, if we stick to this point of view, it should be natural that the number of semi-detached binaries in the predicted broken-contact phase of relaxation oscillations is less than the number in the contact phase.

关键词： stars binaries close - stars binaries eclipsing - stars evolution

A consensus model for group decision making under interval type-2 fuzzy environment

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Frontiers of Information Technology & Electronic Engineering 2016年第3期17卷 237-249页

作者： xiao-xiong ZHANG Bing-feng GE Yue-jin TAN College of Information System and Management National University of Defense Technology Changsha 410073 China

We propose a new consensus model for group decision making(GDM) problems, using an interval type-2 fuzzy environment. In our model, experts are asked to express their preferences using linguistic terms characterized by interval type-2 fuzzy sets(IT2 FSs), because these can provide decision makers with greater freedom to express the vagueness in real-life situations. Consensus and proximity measures based on the arithmetic operations of IT2 FSs are used simultaneously to guide the decision-making process. The majority of previous studies have taken into account only the importance of the experts in the aggregation process, which may give unreasonable results. Thus, we propose a new feedback mechanism that generates different advice strategies for experts according to their levels of importance. In general, experts with a lower level of importance require a larger number of suggestions to change their initial preferences. Finally, we investigate a numerical example and execute comparable models and ours, to demonstrate the performance of our proposed model. The results indicate that the proposed model provides greater insight into the GDM process.

关键词： Group decision making (GDM) Interval type-2 fuzzy sets (IT2 FSs) Feedback mechanism

Effects of dark matter on shadows and rings of Brane-World black holes illuminated by various accretions

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Science China(Physics,Mechanics & Astronomy) 2022年第9期65卷 27-43页

作者： xiao-xiong Zeng Ke-Jian He Guo-Ping Li State Key Laboratory of Mountain Bridge and Tunnel Engineering Chongqing Jiaotong UniversityChongqing 400074China Department of Mechanics Chongqing Jiaotong UniversityChongqing 400074China College of Physics Chongqing UniversityChongqing 401331China Physics and Space College China West Normal UniversityNanchong 637000China

In this study, by taking the accretions into account, the observed shadows and rings cast by the Brane-World black hole were numerically investigated when the observer was located at the cosmological horizon. The results showed that the radius rpof the photon sphere increased with the cosmological parameter α and dark matter parameter β, while the impact parameter bpdecreased with α and increased with β. For thin disk accretion, the total observed intensity is mainly composed of direct ***, the lensing ring and photon ring have only small and negligible contributions, respectively. We also found that shadows and rings exhibit different and exciting features when the disk is located at different positions. For static and infalling spherical accretions, it is evident that the size of shadows is always the same for both accretions. This implies that shadows are only related to space-time geometry in this case. The luminosity of the shadow and photon sphere is closely associated with the Doppler effect and the emissivity per unit volume j(νe). In addition, the influence of dark matter and cosmological constant on the observed intensity of shadows and rings is carefully emphasized throughout this paper. Finally, we obtained the burring images of shadows and rings using the nominal resolution of the event horizon telescope. We also studied the upper limits of the X-clod dark matter parameter β using the data of the shadow of M87.

关键词： dark matter the accretion black hole shadow lensing and photon rings

Effect of rare earth content on microstructure and corrosion resistance of hot-dip Zn-5Al alloy coated steel wire for bridge cables

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Journal of Iron and Steel Research International 2023年第10期30卷 2101-2110页

作者： xiao-xiong Zhu Yi-fu Shen Cheng-tao Li Xiang Dai Guo-hao xiao College of Materials Science and Technology Nanjing University of Aeronautics and Astronautics(NUAA)Nanjing 211106JiangsuChina Jiangsu Tokyo Rope Co. Ltd.Jiangyin 214425JiangsuChina Nanjing Vocational University of Industry Technology Nanjing 210023JiangsuChina

The effects of the content of rare earth elements on the microstructure and properties of hot-dip Zn-5 Al alloy steel wire for bridge cables were *** microstructure of the hot-dip coating was analyzed using an optical microscope and a scanning electron microscope equipped with an energy-dispersive *** bonding force between the hot-dip coating and steel wire was determined by the winding *** corrosion resistance of the steel wire hot-dip coating was tested by the electrochemical *** hot-dip Zn-5A1 alloy coating has a corrosion-resistant structure composed of a zinc-rich phase and an aluminum-rich *** to the enhanced bonding force,the micro structure of the hot-dip coating of the Zn-5A1 alloy with rare earth elements is more compact and uniform than that without rare earth *** addition of rare earth elements improves the corrosion resistance of Zn-5A1 alloy coated steel *** to the rare earth segregation,which prevents the corrosion of the grain boundary and enhances the anti-intergranular corrosion performance,steel wire exhibits the optimum corrosion resistance when the content of rare earth elements is 0.08 wt.%.

关键词： Bridge cable steel wire Hot dipping Rare earth content Corrosion resistance Microstructure

Quasi-Local Masses of Rotating Space-Times

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Communications in Theoretical Physics 2017年第9期67卷 342-346页

作者： xiao-xiong Zeng Ling Li School of Material Science and Engineering Chongqing Jiaotong University Chongqing 400074 China School of Mathematics Sichuan University of Arts and Science Dazhou 635000 China

We derive the Misner-Sharp-like masses Dilaton-Axion black hole by using the modified first of the Reissner-Nordstr6m black hole and the Einstein-Maxwell- law of thermodynamics. Their surface tensions are investigated. For the Reissner-NordstrSm black hole, the outer horizon radius is treated as a variable and the effective temperature is introduced. For the Einstein-Maxwe11-Dilaton-Axion black hole, the outer horizon radius, the angular momentum unit mass and the parameter b are seen as three independent variables, and the mass, the horizon area and the angular momentum are functions of them.

关键词： Misner-Sharp mass rotating space-times the modified first law of thermodynamics

Gut perforation after orthotopic liver transplantation in adults

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World Journal of Gastroenterology 2007年第14期13卷 2125-2128页

作者： Jun xiong Shen You xiao-Shun He Organ Transplantation Center 1^st Affiliated Hospital Sun Yat-Sen University Guangzhou 510080 Guangdong Province China

AIM： To describe cases of gut perforation after orthotopic liver transplantation.METHODS： Data were colleted from our center database and medical records. Six of 187 patients （3.2%）who underwent orthotopic liver transplantation from January to December 2005 developed gut *** patients were male with an average age of 46 *** piggyback liver transplantation was performed at the Organ Transplantation Center, First Affiliated Hospital, Sun Yat-Sen ***： Previous operation, steroid therapy, and prolonged portal venous cross clamp time, poor nutritional status and iatrogenic injury were found to be its ecological factors. The patients with gut perforation were found to have fever, increased leukocytes, mild abdominal pain and tenderness. The median portal venous clamp time was 63 min （range 45-72 min）,median cold ischaemia time was 11.3 h （range 7-15 h）.Median intraoperative blood loss was 500 mL （range 100-1200 mL） and median operation time was 8.8 h （range 6-12 h）. None of the six patients developed acute cellular rejection. White cell count was above 18 × 10^9/L in five patients （neutrophilic leukocytes were above 90%） and 1.5 × 10^9/L in one patient. Bacterial culture in drainage liquid revealed enterococci in five patients. Of the 6 patients undergoing orthotopic liver transplantation, 3 survived and 3 died after modified piggyback liver transplantation.CONCLUSION： Gut perforation occurs after orthotopic liver transplantation in adults. A careful and minimal dissection during OLT, longer retention of the stomach tube, and reducing the portal clamp time and steroid dose should be taken into consideration. If gut perforation is not prevented, then early diagnosis,preferably through detection of enterococci may ensure better survival.

关键词： Orthotopic liver transplantation Gut perforation Enterococcus faecalis