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中国有色金属学会会刊：英文版 2006年第B2期16卷 439-443页

作者： LIU Yu gong xiao-lu Institut Charles Delaunay CNRS FRE 2848 LASMIS UTT 12 rue Marie Curie BP 2060 10010 Troyes France

Interpenetrating phase composites (IPCs) are a new class of composite materials with improved combinations of mechanical and physical properties. This study was performed on a new type of IPC called metal porous polymer composite (MPPC) with an interpenetrating network structure. Aluminum-polypropylene (AI-PE) and Aluminum-epoxy resin (Al-Ep) composites were produced by infiltrating the polymer in the aluminum foam. The composite microstructures were characterized using SEM observation. The compressive behavior and energy absorption characteristics of MPPC were investigated and compared with the aluminum foams. The compressive modulus of composite was compared with the VOIGT-REUSS bounds and HASHIN-SHTRIKMAN (H-S) bounds models. The experimental modulus of compressive tests falls well within the theoretical models.

关键词：金属多孔聚合物复合物互穿网络结构压缩行为能量吸收 MPPC复合物

Effect of WC/W_2C on the microstructure and abrasion resistance of high-boron hardfacing alloys

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Acta Metallurgica Sinica(English Letters) 2010年第6期23卷 439-445页

作者： Jianxun gong Tianshun TANG Yifeng xiao School of Mechanical Engineering Xiangtan University Xiangtan 411105 China

High boron hardfacing alloys reinforced with primary M2B phases on Q235 steel plates were prepared by the method of flux-cored wire submerged arc welding. The microstructure and boride morphology were investigated using optical microscopy （OM）, scanning electron microscopy （SEM） and X-ray diffraction （XRD）. The effect of WC/W2C on the microstructure was discussed. It indicated that the volume fraction of primary M2B phases has increased due to good nucleated cores of incompletely molten W2C particles provided by casting tungsten carbide or decarburizing reaction of WC powders. Abrasion resistance was evaluated by wet sand rubber wear tests and the wear mechanism was studied using SEM. It shows that primary M2B grains play a key role in improving abrasion resistance.

关键词： Primary M2B phases Abrasion resistance Microstructure Submerged arc welding

Plasma-assisted ammonia synthesis under mild conditions for hydrogen and electricity storage:Mechanisms,pathways,and application prospects

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Frontiers in Energy 2024年第4期18卷 418-435页

作者： Feng gong Yuhang JING Rui xiao Key Laboratory of Energy Thermal Conversion and Process Measurement and Control of the Ministry of Education School of Energy and EnvironmentSoutheast UniversityNanjing 210096China

Ammonia,with its high hydrogen storage density of 17.7 wt.%(mass fraction),cleanliness,efficiency,and renewability,presents itself as a promising zero-carbon ***,the traditional Haber−Bosch(H−B)process for ammonia synthesis necessitates high temperature and pressure,resulting in over 420 million tons of carbon dioxide emissions annually,and relies on fossil fuel *** contrast,dielectric barrier discharge(DBD)plasma-assisted ammonia synthesis operates at low temperatures and atmospheric pressures,utilizing nitrogen and hydrogen radicals excited by energetic electrons,offering a potential alternative to the H−B *** method can be effectively coupled with renewable energy sources(such as solar and wind)for environmentally friendly,distributed,and efficient ammonia *** review delves into a comprehensive analysis of the low-temperature DBD plasma-assisted ammonia synthesis technology at atmospheric pressure,covering the reaction pathway,mechanism,and catalyst system involved in plasma nitrogen *** from current research,it evaluates the economic feasibility of the DBD plasmaassisted ammonia synthesis technology,analyzes existing dilemmas and challenges,and provides insights and recommendations for the future of nonthermal plasma ammonia processes.

关键词： plasma catalysis nitrogen fixation ammonia synthesis hydrogen storage catalyst carbon neutralization

Excavation collapse of Hangzhou subway station in soft clay and numerical investigation based on orthogonal experiment method

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2012年第10期13卷 760-767页

作者： xiao-nan gong Xue-chan ZHANG MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering Zhejiang University Hangzhou 310058China Institute of Geotechnical Engineering Zhejiang UniversityHangzhou 310058China

This paper studies the excavation collapse at the Xianghu subway station on Hangzhou metro line *** objective is to present an overview of this case study and discuss the cause of the *** field investigation and preliminary analysis,the reasons for the excavation collapse were the misuse of the soil parameters,over excavation,incorrect installation of steel struts,invalid monitoring data,and inadequate ground ***,a small strain constitutive model was used for further *** order to estimate damage efficiently,the orthogonal array(OA) was introduced for screening the key factor in the numerical *** estimated indexes including deformations and internal forces of the excavation were taken,and the effectiveness of four factors which may cause the collapse was *** numerical experiments and interaction analysis,it is found that the deformation and internal force can be well controlled by jet grouting of the subsoil under the final cutting surface,but increasing the improvement ratio of the jet grouting cannot help optimize the excavation behavior efficiently,and without jet grouting and the fourth level struts,the deformation and internal force of the excavation in this case will far surpass the allowable value.

关键词： Collapse Case study Numerical analysis Orthogonal experiment method Interaction

Therapeutic strategies for peripheral nerve injury: decellularized nerve conduits and Schwann cell transplantation

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Neural Regeneration Research 2019年第8期14卷 1343-1351页

作者： gong-Hai Han Jiang Peng ping Liu xiao Ding Shuai Wei Sheng Lu Yu Wang Kunming Medical University Kunming Yunnan Province China Institute of Orthopedics Chinese PLA General Hospital Beijing China Shanxi Medical Univers让y Taiyuan Shanxi Province China Shihezi University Medical College Shihezi Xinjiang Uygur Autonomous Region China 920^th Hospital of Joint Service Support Force Kunming Yunnan Province China

In recent years, the use of Schwann cell transplantation to repair peripheral nerve injury has attracted much attention. Animal-based studies show that the transplantation of Schwann cells in combination with nerve scaffolds promotes the repair of injured peripheral nerves. Autologous Schwann cell transplantation in humans has been reported recently. This article reviews current methods for removing the extracellular matrix and analyzes its composition and function. The development and secretory products of Schwann cells are also reviewed. The methods for the repair of peripheral nerve injuries that use myelin and Schwann cell transplantation are assessed. This survey of the literature data shows that using a decellularized nerve conduit combined with Schwann cells represents an effective strategy for the treatment of peripheral nerve injury. This analysis provides a comprehensive basis on which to make clinical decisions for the repair of peripheral nerve injury.

关键词： nerve regeneration peripheral nerve injury nerve conduits decellularization extracellular matrix Schwann cell neural regeneration

A New Functor from D_5-Mod to E_6-Mod

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Acta Mathematica Sinica,English Series 2016年第8期32卷 867-892页

作者： xiao ping XU Hua Loo-Keng Key Mathematical Laboratory Institute of MathematicsAcademy of Mathematics & System SciencesChinese Academy of Sciences

We find a new representation of the simple Lie algebra of type E6 on the polynomial algebra in 16 variables, which gives a fractional representation of the corresponding Lie group on 16-dimensional space. Using this representation and Shen＇s idea of mixed product, we construct a new functor from Ds-Mod to E6-Mod. A condition for the functor to map a finite-dimensional irreducible Ds-module to an infinite-dimensional irreducible E6-module is obtained. Our results yield explicit constructions of certain infinite-dimensional irreducible weight E6-modules with finite-dimensional weight subspaces. In our approach, the idea of Kostant＇s characteristic identities plays a key role.

关键词： Simple Lie algebra of type E6 simple Lie algebra of type Ds module category functor,irreducibility

New Algebraic Approaches to Classical Boundary Layer Problems

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Acta Mathematica Sinica,English Series 2011年第6期27卷 1023-1070页

作者： xiao ping XU Hua Loo-Keng Mathematical Laboratory Institute of MathematicsAcademy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100190 P. R. China

Classical non-steady boundary layer equations are fundamental nonlinear partial differential equations in the boundary layer theory of fluid dynamics. In this paper, we introduce various schemes with multiple parameter functions to solve these equations and obtain many families of new explicit exact solutions with multiple parameter functions. Moreover, symmetry transformations are used to simplify our arguments. The technique of moving frame is applied in the three-dimensional case in order to capture the rotational properties of the fluid. In particular, we obtain a family of solutions singular on any moving surface, which may be used to study turbulence. Many other solutions are analytic related to trigonometric and hyperbolic functions, which reflect various wave characteristics of the fluid. Our solutions may also help engineers to develop more effective algorithms to find physical numeric solutions to practical models.

关键词： Boundary layer equation symmetry transformation moving frame exponential approach,trigonometric approach hyperbolic approach rational approach

Partial Differential Equation Approach to E_7

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Acta Mathematica Sinica,English Series 2015年第2期31卷 177-200页

作者： xiao ping XU Hua Loo-Keng Mathematical Laboratory Institute of Mathematics Academy of Mathematics & System Sciences Chinese Academy of Sciences

By solving certain partial differential equations, we find the explicit decomposition of the polynomial algebra over the 56-dimensional basic irreducible module of the simple Lie algebra E7 into a sum of irreducible submodules. This essentially gives a partial differential equation proof of a combinatorial identity on the dimensions of certain irreducible modules of E7. We also determine two three-parameter families of irreducible submodules in the solution space of Cartan＇s well-known fourth-order Ez-invariant partial differential equation.

关键词： Simple Lie algebra E7 partial differential equation irreducible module decomposition,combinatorial identity

Epstein-Barr virus negative primary hepatic leiomyoma: Case report and literature review

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World Journal of Gastroenterology 2013年第25期19卷 4094-4098页

作者： Xian-Zhang Luo Chang-Sheng Ming xiao-ping Chen Nian-Qiao gong Institute of Organ Transplantation Department of Surgery Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Key Laboratory of the Ministry of Health and Key Laboratory of the Ministry of Education

Primary hepatic leiomyoma is a neoplasm of mesen-chymal origin and occurs only rarely. Secondary to benign smooth muscle proliferation, it is usually found in adult women and is associated with Epstein-Barr virus (EBV) infection. Here, we report the 29 th case of primary hepatic leiomyoma with its unique features related to diagnosis, treatment and developmental biology. A 48-year-old man, with an immunocompromised status, complained of pain in the upper quadrant of the abdomen. Serological analysis indicated no presence of hepatitis virus, no human immunodeficiency virus, and no EBV infection. The levels of α-fetoproteinand carcinoembryonic antigen were normal. A mass was detected in segment Ⅲ of the hepatic lobe by ultrasonography and an abdominal computed tomography scan. Endoscopy had negative findings. Exploratory laparotomy found no existing extrahepatic tumor and left lateral lobectomy was performed. Pathological examination showed the mass to be a typical leiomyoma. The cells were positive for α-smooth muscle actin and desmin, and negative for the makers of gastrointestinal stromal tumor (GIST), including CD117, CD34 and DOG1 (discovered on GIST1). In situ hybridization revealed negative status for EBV-encoded small RNA. After left lateral lobectomy, the patient was not given chemotherapy or radiotherapy. During a 2-year follow- up, no sign of local recurrence or distant metastasis was observed. In conclusion, we report a rare case of primary hepatic leiomyoma in a male patient without EBV infection. Hepatic resection was curative. This case presents data to expand our knowledge concerning the complex and heterogeneous nature of primary liver leiomyoma, indicating that EBV infection is important but neither necessary nor sufficient for the development of primary liver leiomyoma.

关键词： Epstein-Barr virus Primary hepatic leiomyoma Cancer diagnosis Tumor resection Developmental biology

Substituent Effect on Infrared Spectra and Thermodynamic Properties of Polynitroamino Substituted Cyclopentane and Cyclohexane

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Chinese Journal of Chemical Physics 2008年第6期21卷 526-534页

作者： Ling Qiu Xue-dong gong He-ming xiao Institute for Computation in Molecular and Material Science School of Chemical Engineering Nanfing University of Science and Technology Nanjing 210094 China Key Laboratory of Nuclear Medicine Ministry of Health Jiangsu Institute of Nuclear Medicine Wuxi 214063 China

Density functional theory method was employed to study the effect of the nitroamino group as a substituent in cyclopentane and cyclohexane, which usually construct polycyclic or caged nitramines. Based on the optimized molecular structures of two groups of monocyclic nitramines at the B3LYP/6-31G^＊＊ level, the infrared （IR） spectra were obtained and assigned by harmonic vibrational analysis. The calculated results agree reasonably with the available experimental data. According to the principles of statistic thermodynamics, thermodynamic properties were derived from the IR spectra, which were linearly correlated with the number of nitroamino groups as well as the temperature. The contributions of nitroamino groups to thermodynamic properties are in accord with the group additivity.

关键词： Density functional theory Substituent effect Monocyclic nitramine Infrared spectrum Thermodynamic property