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浅析现浇泡沫混凝土隔墙施工技术

中国建材科技 2024年第4期33卷 98-101,78页

作者：谢利萍岳谦谢昌盛甘肃第六建设集团股份有限公司甘肃兰州730030

针对现浇轻质泡沫混凝土隔墙施工技术进行分析,从泡沫混凝土隔墙的特点、优势、施工技术及应用效益进行探讨,论述了在建材行业转向绿色、节能、环保的背景下,采用新型隔墙材料代替烧结多孔砖等砌块材料的重要性,并对施工过程、质量管控... 详细信息

针对现浇轻质泡沫混凝土隔墙施工技术进行分析,从泡沫混凝土隔墙的特点、优势、施工技术及应用效益进行探讨,论述了在建材行业转向绿色、节能、环保的背景下,采用新型隔墙材料代替烧结多孔砖等砌块材料的重要性,并对施工过程、质量管控进行总结。经实践表明,其应用效果良好,经济效益显著。

关键词：现浇泡沫混凝土隔墙施工技术

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CLDN18.2在晚期胃癌中的研究进展

肿瘤学杂志 2024年第5期30卷 407-413页

作者：谭夙雅谢长生浙江中医药大学第一临床医学院浙江杭州310053 浙江中医药大学附属第一医院浙江杭州310006

紧密连接蛋白18.2(CLDN18.2)表达于正常胃黏膜上皮细胞,并表达于胃癌、结肠癌、胰腺癌等实体瘤中,是目前消化系统肿瘤治疗的潜在靶点。针对CLDN18.2的靶向治疗主要包括单克隆抗体、嵌合抗原受体T细胞(chimeric antigen receptor T-cell,... 详细信息

紧密连接蛋白18.2(CLDN18.2)表达于正常胃黏膜上皮细胞,并表达于胃癌、结肠癌、胰腺癌等实体瘤中,是目前消化系统肿瘤治疗的潜在靶点。针对CLDN18.2的靶向治疗主要包括单克隆抗体、嵌合抗原受体T细胞(chimeric antigen receptor T-cell,CAR-T)疗法、双特异性抗体和抗体偶联药物。目前已有多项靶向CLDN18.2的药物进入临床试验,其中以佐妥昔单抗(Zolbetuximab)进展最快。全文就CLDN18.2及其在晚期胃癌中的临床研究进展进行综述。

关键词：紧密连接蛋白18.2 胃肿瘤靶向治疗

Microstructure of Cu-based Amorphous Composite Coatings on AZ91D Magnesium Alloy by Laser Cladding

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Journal of Materials Science & Technology 2009年第4期25卷 492-498页

作者： Kaijin Huang changsheng xie T.M. Yue State Key Laboratory of Advanced Welding Production Technology Harbin Institute of Technology Harbin 150001 China State Key Laboratory of Materials Processing and Die ＆ Mould Technology Huazhong University of Scienee and Technology Wuhan 430074 China Department of Industrial and Systems Engineering Hong Kong Polytechnic University Hung Horn Hong Kong China

To improve the sliding wear resistance of AZ91D magnesium alloy, Cu-based amorphous composite coatings made of CuaTTi34Zr11Nis and Cu47Ti34Zr11Ni8＋20 wt pct SiC powders were fabricated on AZ91D magnesium alloy by laser cladding, respectively. SEM （scanning electron microscopy）, EDS （energy dispersive X-ray spectroscopy）, XRD （X-ray diffraction） and TEM （transmission electron microscopy） techniques were employed to study the phases of the coatings. The results show that the coatings mainly consist of amorphous phase and different intermetallic compounds. The reason of formation of amorphous phase and the function of SiC particles were explained in details.

关键词： Laser cladding Cu-based amorphous composite coating SiC particle AZ91D magnesium alloy

A method for modeling and deciphering the persistent photoconductance and long-term charge storage of ZnO nanorod arrays

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Nano Research 2016年第10期9卷 2972-3002页

作者： Qiang Zhu changsheng xie Huayao Li Dawen Zeng State Key Laboratory of Material Processing and Die & Mould Technology Nanomaterials and Smart Sensors Research LaboratoryDepartment of Materials Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China

The controllability of persistent photoconductance （PPC） and charge/energy storage of ZnO nanorod arrays （NRAs） were demonstrated experimentally by tuning the nanorod diameter. The dependency of the ZnO NRAs＇ photoelectric characteristics on the nanorod diameter suggests that the Debye length and photon penetration depth in ZnO could spatially partition a standalone nanorod into three different photoelectric functional regions （PFRs）. Theoretically, a series of rate functions was employed to describe the different extrinsic/intrinsic carrier photogeneration/recombination dynamic sub-processes occurring in the different PFRs, associated with oxygen chemisorption/photodesorption, oxygen vacancy photoionization, and electron trapping by photoionized oxygen vacancies. On the basis of the coupled contributions of these different dynamic sub-processes in the photoelectric properties of the ZnO NRAs, a thorough-process photoelectric dynamic model （TPDM） was proposed using the simultaneous rate functions. Through solving the rate functions, the corresponding analytical equations could be employed to simulate the time-resolved PPC spectra of the ZnO NRAs, and then the quantitative parameters extracted to decipher the PPC and charge/energy storage mechanisms in the ZnO NRAs. In this way, the TPDM model provided a numerical-analytical method to quantitatively evaluate the photoelectric properties of ZnO NRA-based devices. Additionally, the TPDM model revealed how the different photoinduced carrier dynamics in the different PFRs could play functional roles in different optoelectronic applications, e.g., photodetectors, photocatalysts, solar cells and optical nonvolatile memories, and thus it illuminated a practical approach for the design of ZnO NRA-based devices via optimization of the modularized spatial configuration of the PFRs.

关键词： ZnO photoconductance spectrum persistent photoconductance photogenerated carrier rate function analytical fitting

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热轧结构钢棒材内裂纹原因分析及工艺改进

轧钢 2024年第4期41卷 149-154页

作者：谢常胜许宝玉代鑫任振海恽伟达中天钢铁集团(南通)有限公司技术中心江苏南通226156 中天钢铁集团有限公司技术中心江苏常州213011 华北理工大学冶金与能源学院河北唐山063210

针对某钢厂生产的低碳低合金结构钢棒材内部存在长约0.1~0.3 mm显微裂纹的问题,通过低倍组织检查、光学显微镜和扫描电镜观察等方法对低碳低合金棒材内部微裂纹进行了分析和研究,并提出了工艺改进措施。结果表明:低碳低合金钢棒材热轧... 详细信息

针对某钢厂生产的低碳低合金结构钢棒材内部存在长约0.1~0.3 mm显微裂纹的问题,通过低倍组织检查、光学显微镜和扫描电镜观察等方法对低碳低合金棒材内部微裂纹进行了分析和研究,并提出了工艺改进措施。结果表明:低碳低合金钢棒材热轧后内部出现多个彼此不相连、无方向性、长度约0.1~0.3 mm的微裂纹,周围没有异常夹杂物等冶金缺陷,微裂纹沿带状组织的珠光体条带扩展,且珠光体条带周围分布着贝氏体、马氏体混合组织;成分偏析导致低碳低合金钢棒材中出现级别较高的带状组织,且带状组织周围存在贝氏体和马氏体混合组织,在发生较大塑性变形时更容易产生微裂纹;连铸时将过热度控制在20~30℃,电磁搅拌参数设置为200 A、2.0 Hz,二冷区比水量降低至0.41 L/kg,拉坯速度控制在1.2 m/min时,可从连铸坯的源头减轻带状组织;适当延长连铸坯在(1180±10)℃高温段保温时间至250~305 min,可改善成分偏析;热轧棒材入坑缓冷可以避免贝氏体、马氏体组织的产生。工艺改进后对热轧低碳低合金钢棒材进行无损探伤未再发现内裂纹缺陷,改善效果明显。

关键词：低碳低合金热轧棒材内裂纹成分偏析带状组织连铸工艺优化

Numerical Simulation for Three-Dimensional (3D) Unsteady State Temperature Field in Circumferential Laser Oxygen Cutting of Pipes

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Journal of Materials Science & Technology 2003年第Z1期19卷 147-150页

作者： Kaijin HUANG Dawen ZENG changsheng xie Desheng XU State Key Laboratory of Plastic Forming Simulation and Mould Technology Huazhong University of Science and Technology Wuhan 430074 China State Key Laboratory of Laser Technology Huazhong University of Science and Technology Wuhan 430074 China State Key Laboratory of Plastic Forming Simulation and Mould Technology Huazhong University of Science and Technology Wuhan 430074 China State Key Laboratory of Plastic Forming Simulation and Mould Technology Huazhong University of Science and Technology Wuhan 430074 China State Key Laboratory of laser TechnologyHuazhng University of Science and TechnologyWuhan430074china

A 3D unsteady state numerical model of heat transfer in the circumferential laser oxygen cutting of pipes wasdeveloped. In order to minimize the computing time required for solving the finite difference equations as much aspossible, the alternating direction implicit (ADI) method was adopted. Based on the characteristics of the pipe cuttingprocess, the periodic boundary condition was applied to calculate the temperature distribution in the θ direction andthe self-adaptive grid technology was also used. The mathematical model takes account of the temperature-dependentthermal properties of the pipe. The calculated kerfs width and the heat-affected zone (HAZ) were compared withthe experimental results.

关键词： Laser cutting, Pipe, Temperature field

Microstructure and Wear Behaviour of Laser-induced Thermite Reaction Al_2O_3 Ceramic Coating on AA7075 Aluminum Alloy

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Journal of Materials Science & Technology 2007年第2期23卷 201-206页

作者： Kaijin HUANG Xin LIN changsheng xie T.M. Yue State Key Laboratory of Plastic Forming Simulation and Mould Technology Huazhong University of Science and Technology Wuhan 430074 China State Key Laboratory of Solidification Processing Northwestern Polytechnic University Xi＇an 710072 China Department of Industrial and Systems Engineering Hong Kong Polytechnic University Hung Hom Hong Kong China

The microstructure and wear behaviour of the thermite reaction coating produced by the hybrid laser claddingremelting on AA7075 aluminum alloy for the systems of Al-CuO-SiO2, Al-Cr2O3-SiO2, Al-Fe2O3-SiO2, and Al-TiO2-SiO2 were studied. The results of the X-ray diffraction （XRD） analysis show that in all the four reaction coatings, α-Al2O3 and γ-Al2O3 phases were present at the top surface, together with various intermetallic phases, the corresponding reduced metal and Al phase in the fusion zone. Under the dry sliding condition, the wear resistance, in terms of weight loss, of the laser-clad specimens was considerably higher than that of the untreated specimen. The predominant wear mechanism of the former specimens was abrasive wear, while for the latter, it was the adhesive wear that prevailed.

关键词： Laser cladding Thermite reaction Aluminum alloy Wear

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光盘多阶调制编码优化方法研究

光学技术 2024年第2期50卷 241-246页

作者：方争张猛赵雅慧桂天炜李威谢长生吴非华中科技大学武汉光电国家研究中心湖北武汉430074 华中科技大学计算机科学与技术学院湖北武汉430074

传统的光存储系统中采用游程长度受限(RunLengthLimited,RLL)调制技术,受限于光学衍射极限,容量提升难度大。多阶光存储技术采用新型多阶记录介质或多阶调制技术,在不改变光学参数的情况下可以显著的提高光存储的密度和容量。多阶RLL调... 详细信息

传统的光存储系统中采用游程长度受限(RunLengthLimited,RLL)调制技术,受限于光学衍射极限,容量提升难度大。多阶光存储技术采用新型多阶记录介质或多阶调制技术,在不改变光学参数的情况下可以显著的提高光存储的密度和容量。多阶RLL调制编码则是多阶光存储技术中的关键技术,为提高光存储的密度和容量,针对光盘存储研究多阶调制编码优化方法,提出4阶RLL(1,7)调制编码方法,相较于蓝光光盘现采用的17PP编码方法,最大记录密度可达2.4bit,光盘容量提升50%,并具有一定的纠错能力。

关键词：信息光学多阶光存储多阶游程长度受限码调制编码

INHERITANCE OF PRECIPITATED V_4C_3 IN MARTENSITIC TRANSFORMATION

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Acta Metallurgica Sinica(English Letters) 1992年第2期5卷 82-88页

作者： xie changsheng SUN Peizhen ZHAO Jiansheng SUN Desheng Huazhong University of Science and Technology,Wuhan,China Huazhong Univ of Science and Technology Wuhan China

The inheritance phenomenon of precipitated V_4C_3 in martensitic transformation has been in- vestigated by means of electron diffraction and matrix analysis.A crystallographic orientation relation among austenite,martensite and V_4C_3 carbide was found to be. (010)_A∥( 10)_M∥(010)_(v_4c_3), [10 ]∥[11 ]_M [10 ]_(v_4c_3) The V_4C_3 first precipitated in austenite,and then was inherited to *** cer- tain orientation relation was kept between V_4C_3 and martensite,the interfacial structural ana- lysis pointed out that the biphase interfacial energy is higher than that determined by Baker-Nutting relation,thus it is *** the V_4C_3 precipitated along the crystalline defects in austenite,they could be inherited to martensite.

关键词： V_4C_3 transformation inheritance orientation