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Machinability ofγ-TiAl:A review

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Chinese Journal of Aeronautics 2023年第7期36卷 40-75页

作者： ziwen xia Chenwei SHAN Menghua ZHANG Minchao CUI Ming LUO Key Laboratory of High Performance Manufacturing for Aero Engine Ministry of Industry and Information TechnologyNorthwestern Polytechnical UniversityXi’an 710072China Engineering Research Center of Advanced Manufacturing Technology for Aero Engine Ministry of EducationNorthwestern Polytechnical UniversityXi’an 710072China State Key Laboratory of Cemented Carbide Zhuzhou 412000China

Owing to its outstanding mechanical properties,γ-TiAl is desirable materials for crossgeneration *** 70 years of exploration have made it into the initial ***,the intrinsic brittleness ofγ-TiAl is still a critical obstacle to its large-scale *** this context,researchers have made many attempts to study the machinability ofγ-*** present,existing relevant reviews have mostly discussed the processing methods ofγ-***,there is still a lack of a perspective on material properties to analyze the cutting ***,this paper provides the systematic review of such *** all,the developmental process,phase transformation,and microstructural evolution ofγ-TiAl are discussed,as well as its deformation mechanism at *** topics can provide a materials science foundation for the machining ofγ-*** then,the review focuses on the cutting mechanism and surface integrity ofγ-***,special attention is paid to the microscope deformation mechanism and surface defects evolution ofγ-TiAl during ***,the review indicates that the highperformance machining technology ofγ-TiAl faces challenges and proposes potential future research *** the difficulties during machiningγ-TiAl aero-engine components will accelerate the development of new aero-engines.

关键词： Cutting mechanism Deformation Machinability Surface integrity γ-TiAl

“互联网+”背景下企业盈利模式探究——以X公司为例

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中国商论 2023年第19期 165-168页

作者：夏子雯山东工商学院山东烟台264000

互联网技术高频迭代升级、行业竞争日趋激烈等原因使搭建在“互联网+”平台上的业务风险和盈利风险陡增。互联网公司盈利模式的构建和质量成为企业可持续发展的关键,也成为理论界和实务界探讨的热点话题。本文以X公司的盈利模式为研究对... 详细信息

互联网技术高频迭代升级、行业竞争日趋激烈等原因使搭建在“互联网+”平台上的业务风险和盈利风险陡增。互联网公司盈利模式的构建和质量成为企业可持续发展的关键,也成为理论界和实务界探讨的热点话题。本文以X公司的盈利模式为研究对象,运用文献研究法和财务分析法等,针对其盈利模式的框架、质量和绩效展开深入分析,探寻其优劣势,并根据公司运营特质提出优化建议,以期为我国“互联网+”时代下的科技公司提供发展新思路。

关键词：盈利模式框架企业品牌 “互联网+” 盈利模式质量盈利模式绩效

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不同纳米材料的制备方法及其应用前景展望

化工新型材料 2024年第8期52卷 1-7页

作者：梁平夏梓文冯扬杨伟业彭鸿雁赵世华海南师范大学物理与电子工程学院海口571158 海南省院士创新平台海口571158

纳米材料具有特殊的物理、化学、电子和光学等特性,因此在诸多领域有着较为广泛的应用。综述了不同纳米材料的10种典型制备方法,介绍了各种制备方法的优缺点和纳米材料最新的研究进展。随着制备方法的不断创新,合成技术将会更加绿色、... 详细信息

纳米材料具有特殊的物理、化学、电子和光学等特性,因此在诸多领域有着较为广泛的应用。综述了不同纳米材料的10种典型制备方法,介绍了各种制备方法的优缺点和纳米材料最新的研究进展。随着制备方法的不断创新,合成技术将会更加绿色、高效、可控和多功能化。今后的纳米科技将在能源、医疗、环境监测和先进制造等多个领域发挥重要作用,希望能对纳米材料的绿色合成和应用研究提供帮助。

关键词：纳米材料制备方法综述模板法水热法

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论中医“八法”在胸痹治疗中应用

辽宁中医药大学学报 2023年第1期25卷 127-131页

作者：刘鑫戴劲夏子文倪菲石岩于睿辽宁中医药大学辽宁沈阳110847

冠心病是临床常见的心血管疾病,其发病率高、严重危害人类的健康。冠心病可归属于中医“胸痹”“心痛”范畴,中医药治疗自古就具有良好的效果,且与现代治疗手段相比,治疗个性化优势突出。现代治疗多侧重于从痰湿、血瘀、毒蕴等角度进行... 详细信息

冠心病是临床常见的心血管疾病,其发病率高、严重危害人类的健康。冠心病可归属于中医“胸痹”“心痛”范畴,中医药治疗自古就具有良好的效果,且与现代治疗手段相比,治疗个性化优势突出。现代治疗多侧重于从痰湿、血瘀、毒蕴等角度进行辨证论治,而缺少对治则治法的进一步思考。汗、吐、下、和、温、清、消、补“八法”概括了临床常用的中医治法,内涵即为丰富。该文从中医“八法”入手,查阅古籍及相关文献报道,整理“八法”在胸痹治疗中的基本运用及特点,并结合诸多现代研究,探讨八法治疗胸痹的指导思想和具体应用,以期充分发挥中医药的治疗优势。虽然八法中的部分方法在现代已经很少应用,但对于一些疑难及复杂并发症或仍可提供一些诊疗思路。

关键词：胸痹冠心病中医八法中医药治疗

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海南地区健康成年人血栓弹力图参考区间的建立

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中国输血杂志 2022年第4期35卷 441-443页

作者：陈德娟吴巨峰蔡兴权徐春柳夏子雯海南省人民医院输血科海南海口570311

目的建立海南地区健康成年人血栓弹力图(Thromboelastography,TEG)的参考区间,与厂家提供的参考区间进行比较,并分析影响因素。方法根据制定的入选和排除标准招募308名志愿者,并在严格质量控制基础上检测TEG值,以95%可信区间确定各参数... 详细信息

目的建立海南地区健康成年人血栓弹力图(Thromboelastography,TEG)的参考区间,与厂家提供的参考区间进行比较,并分析影响因素。方法根据制定的入选和排除标准招募308名志愿者,并在严格质量控制基础上检测TEG值,以95%可信区间确定各参数的参考区间。结果308名志愿者TEG各参数参考区间分别是R 4.27~9.20min,K 1.60~3.83min,Angle 44.22°~67.78°,MA 47.82~64.17mm,CI-5.63~1.12,G 4.58~9.03。在健康志愿者中至少有1项参数超出了厂家的参考区间占14.94%(46/308);约有74名健康志愿被诊断出“凝血障碍”,检测的特异性为79.22%;男女之间R,K,Angle,MA,CI,G有显著差异(P<0.05);高凝性与高龄无关。结论本研究有效地建立起海南地区健康成年人血栓弹力图的参考区间,为临床和实验室的相关研究提供参考。

关键词：血栓弹力图参考区间海南地区

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双心疾病发病的相关机制探讨

辽宁中医药大学学报 2023年第11期25卷 157-161页

作者：夏子文张欢梁健于游李可大张杰张世祺高钰林于睿辽宁中医药大学辽宁沈阳110847 中国医科大学附属第一医院辽宁沈阳110001

时代发展迅速不但给人类带来生活品质的提高,并且给人类带来许多未知的压力,这使得人类疾病模式由生物医学模式逐渐转变为生物-社会-心理医学模式。在前期的研究中,我们发现中医情志刺激与西医慢性应激是导致双心疾病的主要原因,其机制... 详细信息

时代发展迅速不但给人类带来生活品质的提高,并且给人类带来许多未知的压力,这使得人类疾病模式由生物医学模式逐渐转变为生物-社会-心理医学模式。在前期的研究中,我们发现中医情志刺激与西医慢性应激是导致双心疾病的主要原因,其机制分别为情志刺激影响中医心-脑-肾、慢性应激影响海马和HPA轴,其致病特点非常相似。慢性应激通过影响海马组织中BDNF表达的含量以及刺激外周自主神经的活动等途径,继而改变海马原有的功能,最终形成“双心疾病”,而对于HPA轴来说则是影响了其激素调节的级联机制。中医的情志刺激则是作用于心-脑-肾系统,使得三脏病理相损,终患心疾。深入探究海马和HPA轴与中医心-脑-肾的关系,了解其致病机制,将为中西医治疗“双心疾病”奠定一定的基础。

关键词：双心疾病海马 HPA轴慢性应激心-脑-肾

Quantifying urbanization levels on the Tibetan Plateau with high-resolution nighttime light data

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Geography and Sustainability 2020年第3期1卷 233-244页

作者： Yihang Wang Zhifeng Liu Chunyang He Pei xia ziwen Liu Haimeng Liu Center for Human-Environment System Sustainability(CHESS) State Key Laboratory of Earth Surface Processes and Resource Ecology(ESPRE)Beijing Normal UniversityBeijing 100875China School of Natural Resources Faculty of Geographical ScienceBeijing Normal UniversityBeijing 100875China Institute of Geographic Sciences and Natural Resources Research Chinese Academy of SciencesBeijing 100101China

The Tibetan Plateau(TP)is undergoing rapid *** improve urban sustainability and construct eco-logical security barriers,it is essential to quantify the spatial patterns of urbanization level on the TP,but the existing studies on the topic have been limited by the lack of socioeconomic *** study aims to quantify the urbanization level on the TP in 2018 with Luojia1-01(LJ1-01)high-resolution nighttime light(NTL)***,the compounded night light index is used to quantify spatial patterns of urbanization level at mul-tiple *** results showed that the TP had a low overall urbanization level with a large internal *** urbanization level in the northeast,southeast and south of the TP was relatively high,forming three hotspots centered in Xining City,Lhasa City and Shangri-La City,while the urbanization level in the central and western regions was relatively *** analysis of influencing factors,based on the random forest model,showed that transportation and topography were the main factors affecting the TP’s spatial patterns of urbanization *** comparison analysis with socioeconomic statistics and traditional NTL data showed that LJ1-01 NTL data can be used to more effectively quantify the urbanization level since it is more advantageous for reflecting the spatial extent of urban land and describing the spatial structure of socioeconomic activities within urban *** advantages are attributed to the high spatial resolution of the data,appropriate imaging time and unaf-fected by saturation ***,the proposed LJ1-01 NTL-based urbanization level measurement method has the potential for wide applications around the world,especially in less-developed regions lacking statistical *** this method,we refined the measurement of the TP’s urbanization level in 2018 for multiple scales including the region,basin,prefecture and county levels,which provides basic information for the further urban sustainability r

关键词： Tibetan Plateau Urbanization LuoJia1-01 nighttime light data Cold region Dryland Urban landscape sustainability

Adaptive Neural Control of Uncertain MIMO Nonlinear Systems with Time-Varying Output Constraints

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Adaptive Neural Control of Uncertain MIMO Nonlinear Systems ...

Research on optimization algorithm of Pedestrian Dead Reckoning based on Kalman filter

第三十九届中国控制会议

作者： Yu Hua Tianping Zhang Meizhen xia ziwen Wu Department of Automation College of Information Engineering Yangzhou University

In this paper, the problem of adaptive neural control is discussed for multi-input multi-output（MIMO） strict feedback nonlinear systems with time-varying output constraints and unmodeled dynamics. Using the composite function of hyperbolic tangent function as a nonlinear mapping, the original system is transformed into a novel unconstrained MIMO strict-feedback system with uncertain terms. A auxiliary dynamic signal is designed to estimate the dynamical uncertainties in the novel *** on the transformed system, adaptive neural controller is constructed by using modified dynamic surface control（DSC）technique. Using the defined compact set in stability analysis and Lyapunov function method, all signals in the closed-loop system are proved to be the semi-global uniform ultimate boundedness（SGUUB）. Each element of the output vector can strictly abide by the time-varying constraint conditions.

关键词： Dynamic Surface Control Time Varying Output Constraints Unmodeled Dynamics Strict Feedback Nonlinear Systems

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Research on optimization algorithm of Pedestrian Dead Reckon...