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木麻黄青枯病研究进展

浙江林业科技 2013年第1期33卷 68-73页

作者：刘洪波史冬辉陈旭华马良进陈安良张立钦浙江农林大学林业与生物技术学院浙江临安311300 浙江省乐清市森林病虫防治检疫站浙江乐清325600

木麻黄(Casuarina equisetifolia)青枯病是由青枯劳尔氏菌(Ralstonia solanacearum)引起的一种严重的植物土传病害,主要发生在湿热的热带和亚热带地区,并呈向温带蔓延的趋势,木麻黄青枯病的发生与天气有直接关系,与木麻黄树种、树龄关... 详细信息

木麻黄(Casuarina equisetifolia)青枯病是由青枯劳尔氏菌(Ralstonia solanacearum)引起的一种严重的植物土传病害,主要发生在湿热的热带和亚热带地区,并呈向温带蔓延的趋势,木麻黄青枯病的发生与天气有直接关系,与木麻黄树种、树龄关系密切,与立地环境也有关,并从病害检测、致病机理、抗性育种及病害的防治等方面综述了木麻黄青枯病的研究进展。

关键词：木麻黄青枯病进展

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痛风病中药洗泡相关因素研究

天津护理 2005年第2期13卷 66-67页

作者：董式辉郑晓文王维宁佟强天津中医学院第一附属医院天津300193

目的:探讨痛风洗剂的确切疗效,总结痛风洗剂药物洗泡之最佳温度。方法:根据1997年美国风湿病协会痛风诊断标准,采集病例90例随机分为对照组3 0例、中药洗泡组60例(其中又分为3 7～40℃组3 0例、41～44℃组3 0例)。观察中药洗泡对痛风病... 详细信息

目的:探讨痛风洗剂的确切疗效,总结痛风洗剂药物洗泡之最佳温度。方法:根据1997年美国风湿病协会痛风诊断标准,采集病例90例随机分为对照组3 0例、中药洗泡组60例(其中又分为3 7～40℃组3 0例、41～44℃组3 0例)。观察中药洗泡对痛风病疗效的影响。结果:使用中药洗泡对痛风病急性期的症状起改善作用,且温度41～44℃组比3 7～40℃组起到更强的改善作用。结论:表明痛风洗剂确实起到了内病外治的辅助作用,并确定了最佳洗泡温度,可指导临床,提高治疗效果。

关键词：痛风中药洗泡温度护理

Topological Aspects of Superconductors at Dual Point

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Communications in Theoretical Physics 2008年第6期49卷 1627-1630页

作者： REN Ji-Rong XU dong-hui ZHANG Xin-hui DUAN Yi-shi Institute of Theoretical Physics Lanzhou University Lanzhou 730000 China

We study the properties of the Ginzburg-Landau model at the dual point for the superconductors. By making use of the U（1） gauge potential decomposition and the φ-mapping theory, we investigate the topological inner structure of the Bogomol＇nyi equations and deduce a modified decoupled Bogomol＇nyi equation with a nontrivial topological term, which is ignored in conventional model. We find that the nontrivial topological term is closely related to the N-vortex, which arises from the zero points of the complex scalar field, Furthermore, we establish a relationship between Ginzburg Landau free energy and the winding number.

关键词： dual point Bogomol'nyi equations vortex

Intermetallic Compounds in the Banded Structure and Their Effect on Mechanical Properties of Al/Mg Dissimilar Friction Stir Welding Joints

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Journal of Materials Science & Technology 2017年第4期33卷 359-366页

作者： hui shi Ke Chen Zhiyuan Liang Fengbo dong Taiwu Yu Xianping dong Lanting Zhang Aidang Shan Shanghai Key Lab of Advanced High-Temperature Materials and Precision Forming Shanghai Jiao Tong UniversityShanghai 200240China School of Materials Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China Department of Mechanical Engineering University of Hong KongPokfulam RoadHong KongChina Special Welding Technology Center Shanghai Aerospace Equipments ManufacturerShanghai 200245China

Dissimilar friction stir welding（FSW） between aluminum and magnesium alloy was performed, using various tool rotational speed（TRS） at a ？xed travel speed, with tool offset to aluminum to investigate the formation of intermetallic compounds（IMCs） in the banded structure（BS） zone and their effect on mechanical properties. Large quantities of IMCs, in the form of alternating bands of particles or lamellae, were found in the BS zone, where drastic material intermixing occurred during FSW. The BS microstructural characters in terms of the morphology of the bands and the quantity and distribution of IMC particles varied with TRS. All welds exhibited brittle fracture mode with their fracture paths propagating mainly in/along the IMCs in the BS. It is shown that these BS microstructural characters have significant effect on the mechanical properties of the joints. Suggestions on tailoring the BS microstructure were proposed for improving the strength of the BS zone and the final mechanical properties of the Al/Mg FSW joints.

关键词： Banded structure Intermetallic compounds Dissimilar friction stir welding Mechanical properties

Effect of tungsten carbide particles on microstructure and mechanical properties of Cu alloy composite bit matrix

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Journal of Iron and Steel Research International 2024年第2期31卷 519-530页

作者： Ding-qian dong Feng-yuan He Xin-hui Chen hui Li Kai-hua shi hui-wen Xiong Xin Xiang Li Zhang College of Mechanical Engineering Sichuan University of Science and EngineeringZigong643000SichuanChina State Key Laboratory of Powder Metallurgy Central South UniversityChangsha410083HunanChina Zigong Cemented Carbide Co. Ltd.Zigong643011SichuanChina Material Corrosion and Protection Key Laboratory of Sichuan Province Sichuan University of Science and EngineeringZigong643000SichuanChina

Copper alloy composite bit matrix was prepared by pressureless vacuum infiltration,using at least one of the three kinds of tungsten carbide particles,for example,irregular cast tungsten carbide,monocrystalline tungsten carbide and sintered reduced tungsten carbide *** effects of powder particle morphology,particle size and mass fraction of tungsten carbide on the microstructure and mechanical properties of copper alloy composite were investigated by means of scanning electron microscopy,X-ray diffraction and abrasive wear test in *** results show that tungsten carbide morphology and particle size have obvious effects on the mechanical properties of copper alloy *** tungsten carbide partially dissolved in the copper alloy binding phase,and layers of Cu_(0.3)W_(0.5)Ni_(0.1)Mn_(0.1)C phase with a thickness of around 8–15μm were formed on the edge of the cast tungsten *** 45%irregular crushed fine cast tungsten carbide and 15%monocrystalline cast tungsten carbide were used as the skeleton,satisfactory comprehensive performance of the reinforced copper alloy composite bit matrix was obtained,with the bending strength,impact toughness and hardness reaching 1048 MPa,4.95 J/cm^(2) and 43.6 HRC,*** main wear mechanism was that the tungsten carbide particles firstly protruded from the friction surface after the copper alloy matrix was worn,and then peeled off from the matrix when further wear occurred.

关键词： Polycrystalline diamond compact Pressureless vacuum infiltration Copper alloy composite bit matrix Microstructure characterization Abrasive wear behavior

Photonic Feshbach resonance

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Science China(Physics,Mechanics & Astronomy) 2010年第7期53卷 1234-1238页

作者： XU DaZhi IAN Hou shi Tao dong hui SUN ChangPu Institute of Theoretical Physics Chinese Academy of SciencesBeijing 100190China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China

Feshbach resonance is a resonance for two-atom scattering with two or more channels,in which a bound state is achieved in one *** show that this resonance phenomenon not only exists during the collisions of massive particles,but also emerges during the coherent transport of massless particles,that is,photons confined in the coupled resonator arrays linked by a separated cavity or a tunable two level system(TLS).When the TLS is coupled to one array to form a bound state in this setup,the vanishing transmission appears to display the photonic Feshbach *** process can be realized through various experimentally feasible solid state systems,such as the couple defected cavities in photonic crystals and the superconducting qubit coupled to the transmission *** numerical simulation based on the finite-different time-domain(FDTD) method confirms our assumption about the physical implementation.

关键词： Feshbach resonance bound state single-photon transistor

基于钢结构BIM模型的结构分析数据转换和软件开发

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哈尔滨工业大学学报 2025年第1期57卷 161-169页

作者：赵诗华刘栋余香林石永久清华大学土木工程系北京100084

为解决当前在钢结构建筑信息模型(building information modeling,BIM)与结构分析模型之间进行数据转换时存在的关键技术问题,本文在分析工业基础类(industry foundation classes,IFC)标准表达方法的基础上,以ABAQUS为结构分析平台,开... 详细信息

为解决当前在钢结构建筑信息模型(building information modeling,BIM)与结构分析模型之间进行数据转换时存在的关键技术问题,本文在分析工业基础类(industry foundation classes,IFC)标准表达方法的基础上,以ABAQUS为结构分析平台,开发了钢结构BIM模型数据转换算法,运用C#语言和Xbim工具包,实现了结构构件信息提取、构件空间位置调整和分析数据自动添加,并形成了相应的转换软件;通过钢框架结构实例分析验证了该软件的可靠性和准确性,并将其应用于安阳市游客集散中心的BIM模型转换和结构分析。结果表明,所开发的算法和软件解决了生成的结构分析模型节点不连接和人工添加分析数据工作量大等问题,实现了BIM中的钢结构设计模型或深化设计模型向ABAQUS结构分析模型数据的准确转换。与传统的在ABAQUS中直接建立结构分析模型相比,本文提出的方法能大大提高复杂钢结构的结构分析建模速度和效率。

关键词：钢结构建筑信息模型(BIM) IFC标准模型转换结构分析

Effect of lamellarization on the microstructure and mechanical properties of marine 10Ni5CrMoV steel

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 402-413页

作者： Tao Zou Yanwu dong Zhouhua Jiang Shuyang Du Yushuo Li School of Metallurgy Northeastern UniversityShenyang 110819China Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819China Key Laboratory for Ecological Metallurgy of Multimetallic Ores(Ministry of Education) Northeastern UniversityShenyang 110819China

Multistage heat treatment involving quenching(Q),lamellarizing(L),and tempering(T)is applied to marine 10Ni5CrMoV *** microstructure and mechanical properties were studied by multiscale characterizations,and the kinetics of reverse austenite transformation,strain hardening behavior,and toughening mechanism were further *** lamellarized specimens possess low yield strength but high toughness,especially cryogenic *** leads to the development of film-like reversed austenite at the martensite block and lath boundaries,refining the martensite structure and lowering the equivalent grain *** analysis of austenite reversion based on the JMAK model shows that the isothermal transformation is dominated by the growth of reversed austenite,and the maximum transformation of reversed austenite is reached at the peak temperature(750℃).The strain hardening behavior based on the modified Crussard-Jaoul analysis indicates that the reversed austenite obtained from lamellarization reduces the proportion of martensite,significantly hindering crack propagation via martensitic transformation during the *** a consequence,the QLT specimens exhibit high machinability and low yield *** with the QT specimen,the ductile-brittle transition temperature of the QLT specimens decreases from-116 to-130℃due to the low equivalent grain size and reversed austenite,which increases the cleavage force required for crack propagation and absorbs the energy of external load,*** work provides an idea to improve the cryogenic toughness of marine 10Ni5CrMoV steel and lays a theoretical foundation for its industrial application and comprehensive performance improvement.

关键词： 10Ni5CrMoV steel lamellarizing reversed austenite cryogenic toughness ductile-brittle transition temperature

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HPLC法同时测定白术中4种倍半萜

中成药 2020年第4期42卷 927-931页

作者：丁逸雪徐继校吴威陆洁淼董诗慧余佳琰秦路平朱波浙江中医药大学药学院浙江杭州310053

目的建立HPLC法同时测定白术中白术内酯Ⅰ、白术内酯Ⅱ、白术内酯Ⅲ、苍术酮的含有量。方法白术甲醇提取液的分析采用Eclipse Plus C18色谱柱(4. 6 mm×250 mm,5μm);流动相乙腈-水,梯度洗脱;柱温25℃;体积流量1. 0 m L/min;检测波长220... 详细信息

目的建立HPLC法同时测定白术中白术内酯Ⅰ、白术内酯Ⅱ、白术内酯Ⅲ、苍术酮的含有量。方法白术甲醇提取液的分析采用Eclipse Plus C18色谱柱(4. 6 mm×250 mm,5μm);流动相乙腈-水,梯度洗脱;柱温25℃;体积流量1. 0 m L/min;检测波长220 nm、276 nm。结果白术内酯Ⅰ、白术内酯Ⅱ、白术内酯Ⅲ、苍术酮分别在0. 005 2~0. 052 mg/m L (R^2=0. 999 6)、0. 010~0. 10 mg/m L (R^2=0. 999 9)、0. 090~2. 9μg/m L (R^2=0. 999 7)、0. 30~1. 8 mg/m L (R^2=0. 999 9)范围内线性关系良好,平均加样回收率99. 13%~100. 34%,RSD 0. 72%~4. 76%。结论该方法准确稳定,重复性好,可用于白术的质量控制。

关键词：白术白术内酯Ⅰ 白术内酯Ⅱ 白术内酯Ⅲ 苍术酮 HPLC