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K_2Bi(IO_3)_4Cl晶体的生长及性质研究

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人工晶体学报 2015年第12期44卷 3704-3709页

作者：刘剑唐山学院环境与化学工程系唐山063000 唐山市微纳米材料制备及应用重点实验室唐山063000

报道一种新型的K_2Bi(IO_3)_4Cl晶体的生长及其性质。以KIO_3:BiCl_3摩尔比为2∶1,采用水热法生长出了尺寸为2 mm×2.5 mm×1.5 mm的透明K_2Bi(IO_3)_4Cl晶体,该晶体属于单斜晶系,空间群为P21/c,晶胞参数为:a=1.1216(3)nm,b=1.2260(3)nm,c=1.0444(2)nm,Z=4,V=0.13522(5)nm^3。晶体的电子能带结构和态密度的理论计算结果说明K_2Bi(IO_3)4Cl化合物的直接带隙大小为2.343 eV,吸收光谱表明其光吸收边为2.466 eV。

关键词：水热法晶体生长碘酸盐 K2Bi(IO3)4Cl

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方形钢管约束下核心混凝土的本构关系

华南理工大学学报（自然科学版） 2008年第1期36卷 105-109页

作者：蔡健孙刚华南理工大学建筑学院广东广州510640

分析了方形钢管混凝土在轴压下的受力机理,将钢管对混凝土的约束作用等效为有效侧向应力,借鉴典型的约束混凝土本构模型,提出了方形钢管约束下核心混凝土的等效单轴受压本构关系.基于试验结果,讨论确定了所提出的本构关系的几个关键参... 详细信息

分析了方形钢管混凝土在轴压下的受力机理,将钢管对混凝土的约束作用等效为有效侧向应力,借鉴典型的约束混凝土本构模型,提出了方形钢管约束下核心混凝土的等效单轴受压本构关系.基于试验结果,讨论确定了所提出的本构关系的几个关键参数和强度指标,即峰值应变修正系数、钢管有效侧向压应力系数、峰值时钢管的横向应力等.采用建议的本构关系计算了轴压下方形钢管混凝土短柱的荷载-应变全过程曲线,计算结果与试验结果吻合良好.所建议的本构关系可用于评估方形钢管混凝土短柱的极限承载力和延性.

关键词：方形钢管混凝土柱本构关系约束混凝土等效侧向压应力

Applied evolutionary biology could aid management of invaded ecosystems

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Ecosystem Health and Sustainability 2015年第6期1卷 2-7页

作者： Ayub M.O.Oduor Xiubo Yu jian liu International Ecosystem Management Partnership-United Nations Environment Programme(UNEP-IEMP) 11A Datun RoadChaoyang DistrictBeijing 100101 China Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences11A Datun RoadChaoyang DistrictBeijing100101 China Ecology Department of BiologyUniversity of KonstanzUniversitatsstrasse10D-78457 KonstanzGermany

Invasive plant species subvert essential ecosystem services through a reduction in the abundance and genetic diversity of native plant species.A major challenge now facing land managers and policy makers is how to ensure persistence of native plants while limiting harmful impacts of *** from recent empirical studies suggest that native plants may evolve adaptations to invasive plants and that adaptive evolution in invasive plants could lessen the negative impacts of ***,we suggest ways in which knowledge of adaptive evolution in invasive and native plants could be utilized to more effectively manage invaded ecosystems.

关键词： ecological and evolutionary theory ecosystem health ecosystem restoration evolutionary application invasive species plant invasion policy

High strength bimetallic composite material fabricated by electroslag casting and characteristics of its composite interface

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China Foundry 2016年第6期13卷 389-395页

作者： Tian-shun Dong Jin-hai liu Qian Fang Guo-lu Li jian-jun Zhang School of Material Science and Engineering Hebei University of Technology

Bimetallic composite material of bainitic steel and PD3 steel was produced with electroslag casting process, and element distribution of its composite interface was investigated by theoretical calculation and energy dispersive spectrometer(EDS). Results show that the tensile strength(1,450 MPa), hardness(HRC 41-47) and impact toughness(94.7J·cm^(-2)) of bainitic steel were comparatively high, while its elongation was slightly low(4.0%). Tensile strength(1,100 MPa), hardness(>HRC 31) and elongation(7.72%) of the interface were also relatively high, but its impact toughness was low at 20.4 J·cm^(-2). Results of theoretical calculation of the element distribution in the interface region were basically consistent with that of EDS. Therefore, electroslag casting is a practical process to produce bimetallic composite material of bainitic steel and PD3 steel, and theoretical calculation also is a feasible method to study element distribution of their interface.

关键词： electroslag casting bimetallic composite material bainitic steel interface

Controllable construction of yolk–shell Sn–Co@void@C and its advantages in Na-ion storage

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Rare Metals 2021年第9期40卷 2392-2401页

作者： Shuang liu Xin-Ze Li Bin Huang jian-Wen Yang Quan-Qi Chen Yan-Wei Li Shun-Hua Xiao Guangxi Key Laboratory of Electrochemical and Magneto-Chemical Functional Materials College of Chemistry and BioengineeringGuilin University of TechnologyGuilin 541004China

In the family of anodes for sodium-ion batteries,alloy-type anodes possess higher theoretical specific capacity than carbon anodes. The theoretical specific capacity of metallic Sn is 847 mAh·g^(-1). However, the tinbased material undergoes a large volume expansion during the sodium-ion intercalation process, which leads to the crack and pulverization of the electrode, consequently resulting in a significant capacity loss. In this paper, a yolk–shell-structured Sn–Co@void@C composite composed of a Sn–Co alloy core, a carbon shell and void space between the core and shell is designed and *** with the carbon-encapsulated SnCo without void space(Sn–Co@C) and carbon-encapsulated pure Sn core shell with void space(Sn@void@C), this composite exhibits improved reversibility, cyclic performance and rate capability. This work highlights the important roles of Co in the alloy and the void space between the core and the shell. The former can not only buffer the volume expansion of Sn, but also act as an electrical conductor. The void space can further tolerate the volume expansion of the Sn–Co core. Owing to this unique microstructure, the Sn–Co@void@C composite shows an initial reversible capacity of 591.4 mAh·g^(-1), at a current density of50 mA·g^(-1). After 100 charge/discharge cycles at100 mA·g^(-1), the composite still delivers 330 mAh·g^(-1).

关键词： Nanocomposites Yolk-shell structure Tin-based alloys Anodes Sodium-ion batteries

Laparoscopy-assisted gastrectomy for advanced gastric cancer patients with situs inversus totalis: Two case reports and review of literature

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World Journal of Gastrointestinal Surgery 2023年第9期15卷 2063-2073页

作者： Hong-Bo liu Xiao-Peng cai Zhao Lu Bin Xiong Chun-Wei Peng Department of Gastrointestinal Surgery Hubei Key Laboratory of Tumor Biological Behaviors&Hubei Cancer Clinical Study CenterWuhan Peritoneal Cancer Clinical Medical CenterZhongnan Hospital of Wuhan UniversityWuhan 430070Hubei ProvinceChina School of Nursing Wuhan UniversityWuhan 430070Hubei ProvinceChina

BACKGROUND Situs inversus totalis(SIT)is a rare condition in which the positions of abdominal and thoracic organs present a“mirror image”of the normal ones in the median sagittal *** minimally invasive surgery has evolved to achieve laparoscopic gastrectomy for gastric cancer(GC)patients with SIT,it is difficult to perform lymphadenectomy(LND)in such a transposed anatomical ***,we report the cases of two patients with SIT who successfully underwent laparoscopy-assisted gastrectomy(LAG)with D2 *** SUMMARY Case 1:A 65-year-old man was admitted for intermittent abdominal pain and distension,occasional belching,and acid reflux for 4 *** was diagnosed with GC(cT3N1-2M0)with *** surgery,he had undergone four cycles of neoadjuvant chemotherapy and ***,the patient was evaluated as having a partial response,and laparoscopy-assisted distal gastrectomy with D2 LND and Billroth II reconstruction were *** operation was performed successfully within 240 min with an estimated blood loss of 50 mL and no severe *** patient was discharged on postoperative day(POD)*** 2:A 55-year-old man was admitted for upper abdominal distension with pain and discomfort after eating for 3 *** was diagnosed with GC(cT3N1M0)with *** had a history of hypertension for more than 10 years;however,his blood pressure was well-controlled via regular *** performed laparoscopy-assisted total gastrectomy with D2 LND and Roux-en-Y *** operation was performed successfully within 168 min with an estimated blood loss of 50 mL and no severe *** patient was discharged on POD *** LAG with D2 LND could be considered an accessible,safe,and curative procedure for advanced GC patients with SIT.

关键词： Situs inversus totalis Laparoscopy-assisted gastrectomy Advanced gastric cancer Surgery modality Lymphadenectomy Case report

基于双剪强度理论的混凝土板极限冲切承载力计算方法

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工程力学 2006年第6期23卷 110-113,93页

作者：蔡健林凡华南理工大学土木工程系广州510640 华南理工大学建筑设计研究院广州510640

将混凝土板的冲切破坏简化为平面应变问题,采用双剪应力三参数强度准则对冲切破坏时的混凝土板剪压区的复合应力进行分析,得到了剪压面上的极限竖向剪应力,利用静力平衡条件求得混凝土板的极限冲切承载力计算公式。与国内外246个试件的... 详细信息

将混凝土板的冲切破坏简化为平面应变问题,采用双剪应力三参数强度准则对冲切破坏时的混凝土板剪压区的复合应力进行分析,得到了剪压面上的极限竖向剪应力,利用静力平衡条件求得混凝土板的极限冲切承载力计算公式。与国内外246个试件的试验数据进行比较表明,该公式的计算结果与试验结果吻合良好。计算公式的计算模式概念清晰,可供结构设计时参考。

关键词：混凝土板极限冲切承载力双剪应力三参数强度准则复合应力冲切破坏

Sustainable wood-based nanotechnologies for photocatalytic degradation of organic contaminants in aquatic environment

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Frontiers of Environmental Science & Engineering 2021年第4期15卷 19-40页

作者： Xinyi liu caichao Wan Xianjun Li Song Wei Luyu Zhang Wenyan Tian Ken-Tye Yong Yiqiang Wu jian Li College of Materials Science and Engineering Central South University of Forestry and TechnologyChangsha410004China Material Science and Engineering College Northeast Forestry UniversityHarbin150040China School of Electrical and Electronic Engineering Nanyang Technological UniversitySingapore639798Singapore Yihua Lifestyle Technology Co. LtdHuaidong Industrial ZoneLianxia TownChenghai DistrictShantou515834China Caichao Wan

Wood-based nanotechnologies have received much attention in the area of photocatalytic degradation of organic contaminants in aquatic environment in recent years,because of the high abundance and renewability of wood as well as the high reaction activity and unique structural features of these ***,we present a comprehensive review of the current research activities centering on the development of wood-based nanocatalysts for photodegradation of organic *** review begins with a brief introduction of the development of photocatalysts and hierarchical structure of *** review then focuses on strategies of designing novel photocatalysts based on wood or its recombinants(such as 1D fiber,2D films and 3D porous gels)using advanced nanotechnology including sol-gel method,hydrothermal method,magnetron sputtering method,dipping method and so ***,we highlight typical approaches that improve the photocatalytic property,including metal element doping,morphology control and semiconductor ***,the structure-activity relationship of photocatalysts is ***,a brief summary and prospect of wood-derived photocatalysts is provided.

关键词： Wood Nanocatalysts Photodegradation Organic contaminants Composites

Kinetic triplet from low-temperature carburization and carbon deposition reactions

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Journal of Iron and Steel Research International 2022年第10期29卷 1545-1558页

作者： Wei Zhang Kui Li jian-hong Dong Cheng-zhi Li Ai-hua liu Ju-hua Zhang Zheng-liang Xue The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan430081HubeiChina Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and TechnologyWuhan430081HubeiChina Hanshan Normal University Chaozhou521041GuangdongChina Key Laboratory of Ecological Utilization of Multi-Metallic Mineral of Education Ministry Northeastern UniversityShenyang110819LiaoningChina

Carbon deposition reaction is unfavorable for smooth operation of blast furnace,while the product of carburization reaction is a superior iron-bearing raw material in non-blast furnace *** kinetic triplet of these two reactions was obtained based on non-isothermal kinetic *** to the Sharp–Wentworth method,the activation energy of the carburization reaction is 397.77 kJ/mol,and the activation energies of the carbon depositions on hematite and magnetite are 188.92 and 100.89 kJ/mol,*** carburization reaction is controlled by the Jander mechanism,and the carbon depositions on hematite and magnetite are both controlled by the mechanism of Zhuravlev–Lesokhin–*** on Coats–Redfern method,the activation energies of the above three reactions are 360.65,149.29,and 102.36 kJ/mol,*** carburization reaction is a first-order reaction,while the carbon depositions on hematite and magnetite are both third-order *** particular,the negative activation energy is obtained if considering the anti-Arrhenius circumstance in the Sharp-Wentworth *** on above results,it is feasible to adopt non-isothermal kinetic method to study the kinetic triplet of a *** to the obtained activation energies and reaction mechanism functions,the simulated kinetic data are in good agreement with the experimental values even using the negative activation energy.

关键词： Kinetic triplet Carburization reaction Carbon deposition Non-isothermal kinetic Magnetite Hematite