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基于数据挖掘探析针刺治疗风寒湿型冻结肩的辨经选穴规律

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中医康复 2024年第3期1卷 55-59页

作者：郭慧胡晓丽辽宁中医药大学辽宁沈阳110032 辽宁中医药大学附属医院辽宁沈阳110847

目的:基于数据挖掘探索针刺治疗风寒湿型冻结肩的有效经络及配穴规律。方法:通过Note-Express检索整合CNKI、Wanfang、VIP、Pub-Med、Science Direct、JAMA-Network、Web of Science等中英文数据库中近十年有关针刺治疗风寒湿型冻结肩的... 详细信息

目的:基于数据挖掘探索针刺治疗风寒湿型冻结肩的有效经络及配穴规律。方法:通过Note-Express检索整合CNKI、Wanfang、VIP、Pub-Med、Science Direct、JAMA-Network、Web of Science等中英文数据库中近十年有关针刺治疗风寒湿型冻结肩的RCT试验,对符合纳入标准的文献经络及配穴建立数据库,构建复杂网络,进行聚类分析及关联分析。结果:共纳入38篇文献,提取出57条针刺治疗风寒湿型冻结肩处方,涉及有效正经10条、腧穴33个。复杂网络得出肩髃、肩贞、肩髎各自所归的手阳明大肠经、手太阳小肠经和手少阳三焦经的度值位居前三;聚类分析得到3个高频腧穴聚类群及3个经络聚类群;关联分析得到肩髃、肩髎、肩贞、风池、阳陵泉为治疗风寒湿型冻结肩的核心组方。结论:针刺治疗风寒湿型冻结肩选穴以肩关节周围为主,远端配穴为辅,首选手三阳经经穴有法可循、有据可依。

关键词：冻结肩风寒湿型针刺选穴规律数据挖掘

Zn改性Ni/Al_(2)O_(3)催化剂的苯乙炔选择加氢性能

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应用化学 2024年第7期41卷 948-958页

作者：赛徐煦胡晓丽孙利民刘洪基陈洲方维平伊晓东中国石油兰州石化研究中心兰州730000 厦门大学化学化工学院固体表面物理化学国家重点实验室厦门361005 厦门大学材料学院厦门361005

采用浸渍法制备了一系列不同Zn质量分数的ZnNi/Al_(2)O_(3)催化剂,并通过X射线粉末衍射(XRD)、氢气程序升温吸附(H_(2)-TPR)、X射线光电子能谱(XPS)等表征手段和密度泛函理论(DFT)计算模拟等考察了Zn的引入对催化剂的结构、性质以及苯... 详细信息

采用浸渍法制备了一系列不同Zn质量分数的ZnNi/Al_(2)O_(3)催化剂,并通过X射线粉末衍射(XRD)、氢气程序升温吸附(H_(2)-TPR)、X射线光电子能谱(XPS)等表征手段和密度泛函理论(DFT)计算模拟等考察了Zn的引入对催化剂的结构、性质以及苯乙炔选择加氢制苯乙烯反应性能的影响。结果表明,适量Zn的添加显著提升了Ni/Al_(2)O_(3)催化剂的苯乙炔选择加氢性能,与Ni/Al_(2)O_(3)催化剂相比,3%Zn-Ni/Al_(2)O_(3)催化剂上苯乙炔转化率由92.2%提高至96.8%,而苯乙烯的损失率则由4.3%下降至1.8%。催化剂的XRD和H_(2)-TPR表征结果显示,Zn掺杂到NiO晶格中增强了活性金属Ni与载体间的相互作用,有利于提高Ni的分散度;XPS表征结果表明,Zn表面的电子会向Ni转移,使Ni表面更加富电子。理论计算结果证实引入Zn后的催化剂表面容易形成稳定的Zn7Ni结构,Zn的表面电子向Ni迁移形成了富电子的Ni活性中心,对苯乙烯过渡加氢能垒为1.42 eV,高于选择加氢制苯乙烯的脱附能垒(0.55 eV),提高了Zn改性Ni/Al_(2)O_(3)催化剂的苯乙炔选择性加氢性能。

关键词：苯乙炔选择加氢锌改性镍基催化剂理论模拟

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Enhance liquid nitrogen fracturing performance on hot dry rock by cyclic injection

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Petroleum Science 2023年第2期20卷 951-972页

作者： Chun-Yang Hong Rui-Yue Yang Zhong-Wei huang xiao-Ying Zhuang Hai-Tao Wen xiao-li hu State Key Laboratory of Petroleum Resources and Prospecting China University of PetroleumBeijing102249China Chair of Computational Science and Simulation Technology Faculty of Mathematics and PhysicsLeibniz Universität HannoverHannover30167Germany

Producing complex fracture networks in a safe way plays a critical role in the hot dry rock (HDR) geothermal energy exploitation. However, conventional hydraulic fracturing (HF) generally produces high breakdown pressure and results only in single main fracture morphology. Furthermore, HF has also other problems such as the increased risk of seismic events and consuption of large amount of water. In this work, a new stimulation method based on cyclic soft stimulation (CSS) and liquid nitrogen (LN2) fracturing, known as cyclic LN2 fracturing is explored, which we believe has the potential to solve the above issues related to HF. The fracturing performances including breakdown pressure and fracture morphology on granites under true-triaxial stresses are investigated and compared with cyclic water fracturing. Cryo-scanning electron microscopy (Cryo-SEM) tests and X-ray computed tomography (CT) scanning tests were used for quantitative characterization of fracture parameters and to evaluate the cyclic LN2 fracturing performances. The results demonstrate that the cyclic LN2 fracturing results in reduced breakdown pressure, with between 21% and 67% lower pressure compared with using cyclic water fracturing. Cyclic LN2 fracturing tends to produce more complex and branched fractures, whereas cyclic water fracturing usually produces a single main fracture under a low number of cycles and pressure levels. Thermally-induced fractures mostly occur around the interfaces of different particles. This study shows the potential benefits of cyclic LN2 fracturing on HDR. It is expected to provide theoretical guidance for the cyclic LN2 fracturing application in HDR reservoirs.

关键词： Hot dry rock liquid nitrogen fracturing Cyclic injection Thermal stress Fatigue damage

Effect of Y substitution on the microstructure,magneto-optical,and thermal properties of(Tb_(1−x)Y_(x))_(3)Al_(5)O_(12)transparent ceramics

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Journal of Advanced Ceramics 2024年第4期13卷 529-538页

作者： lixuan Zhang Dianjun hu xiao li Ziyu liu Chen hu Lexiang Wu Tingsong li Dariusz Hreniak Jiang li Transparent Ceramics Research Center Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 201899China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Ganjiang Innovation Academy Chinese Academy of SciencesGanzhou 341000China Institute of Low Temperature and Structure Research Polish Academy of SciencesWroclaw 50-422Poland

Faraday isolators can prevent the front-end system from disturbance and damage caused by a back-reflected beam,so they are important elements in laser *** magneto-optical materials are the most important component in Faraday isolators,the studies on magneto-optical materials have attracted much attention these ***_(3)Al_(5)O_(12)(TAG)ceramics are considered to be one of the most promising magneto-optical materials for visible to near-infrared wavelength band application because of their outstanding comprehensive magneto-optical ***,the optical quality of TAG ceramics needs further optimization to meet the application *** this work,high optical quality(Tb_(1−x)Y_(x))_(3)Al_(5)O_(12)(x=0,0.05,0.1,0.2,and 0.3)magneto-optical ceramics were fabricated successfully by solid-state reaction sintering combined with hot isostatic pressing(HIP)*** the ceramics obtained showed a single garnet phase for different values of x in the range *** addition of Y_(2)O_(3) was found to suppress the secondary phase and improve optical quality *** ceramic samples obtained had clear grain boundaries and possessed the in-line transmittance values of 82.9%at 1064 nm and 82.2%at 633 nm,*** Verdet constants of(Tb_(1−x)Y_(x))_(3)Al_(5)O_(12)ceramics with x=0,0.05,0.1,0.2,and 0.3 were−188.1,−175.4,−168.5,−143.0,and−119.9 rad/(T·m),*** thermal conductivity of TAG ceramics was found to be 5.23 W/(m·K)at 25℃,and when 20%Y was substituted in place of Tb,the thermal conductivity decreased by only 9.4%.

关键词： (Tb_(1−x)Y_(x))_(3)Al_(5)O_(12)ceramics magneto-optical materials optical quality thermal properties

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学生“三证”自助填报系统的设计与实现

信息技术 2024年第8期48卷 79-85页

作者：闵亮胡晓丽刘嘉乐贠一诺西安交通大学城市学院计算机系西安710018 陕西高校青年创新团队西安710018 桂林电子科技大学计算机与信息安全学院广西桂林541004

针对传统“三证”人工管理中存在的不足,设计并实现学生“三证”自助填报系统。系统以Java为核心语言,通过后端链接MySQL数据库,进行数据的采集和存储,通过SSM作为主要架构来构建主体。前端主要用HTML等动态网页技术来完成界面的设计和... 详细信息

针对传统“三证”人工管理中存在的不足,设计并实现学生“三证”自助填报系统。系统以Java为核心语言,通过后端链接MySQL数据库,进行数据的采集和存储,通过SSM作为主要架构来构建主体。前端主要用HTML等动态网页技术来完成界面的设计和开发。在真实的环境下,对开发完成的系统进行了测试,结果表明系统满足了设计目标,具有较好的稳定性和兼容性,用户可以使用该系统更简单、实时、高效的完成学生“三证”自助填报。

关键词：自助填报系统 Java编程语言 Android技术 MySQL数据库 B/S结构

Investigation of mechanical and electrical characteristics of selfsensing pneumatic torsional actuators

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Science China(Technological Sciences) 2024年第1期67卷 130-142页

作者： xiao Wei hu DeAn hu Guoliang xiao Yihua Key Laboratory of Conveyance and Equipment Ministry of EducationEast China Jiaotong UniversityNanchang 330013China Key Laboratory of Advanced Design and Simulation Techniques for Special Equipment Ministry of EducationHunan UniversityChangsha 410082China

Soft pneumatic actuators are one of the most promising actuation for soft robots,and great achievements have been *** it remains challenging to endow sensing capabilities to pneumatic actuators,especially for the sensing ability originating directly from the actuator ***,a self-sensing pneumatic torsional actuator(SPTA)is designed based on the electromagnetic induction effect and magnetically responsive *** SPTA can generate feedback voltage and current with the deformation,in which the sensing function comes from its inherent *** investigate the mechanical and electrical characteristics,an experimental platform and a finite element model are established,*** find that the torsion angle and output torque increase in nonlinear with the actuating *** maximum torsion angle is 66.35°,which is 84.34%of that for the actuator fabricated by pure *** maximum output torque(24.9 N mm)improves by 23.19%compared with the actuator made by pure *** regards the electrical characteristics,the maximum feedback voltage and current are 2.90μV and 29.50 nA when the SPTA is actuated by a pressure of−40 *** also demonstrate that the relationship between the torsion angle and the magnetic flux change is approximately ***,the number of turns of wires,magnetic powders contents,and magnetic direction on the feedback voltage and current are *** show that the feedback voltage and current can be enhanced by increasing the number of turns and magnetic powders *** envision that the SPTA would be promising for soft robots to realize their accuracy control and intelligentization.

关键词： pneumatic torsional actuators self-sensing feedback voltage finite element modeling soft robots

Current-carrying tribological behavior of C/Cu contact pairs in extreme temperature and humidity environments for railway catenary systems

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Science China Technological Sciences 2024年第8期67卷 2537-2548页

作者： SHEN MingXue JI Dehui hu Qiang xiao li li QiuPing State Key Laboratory of Performance Monitoring and Protecting of Rail Transit Infrastructure East China Jiaotong University School of Materials Science and Engineering East China Jiaotong University Institute of Applied Physics Jiangxi Academy of Sciences

Many current-carrying contact pairs, such as those found in pantograph-catenary systems, operate in open environments and are susceptible to significant external interference from temperature and humidity variations. This study investigated the evolution of the friction coefficient and contact resistance of C/Cu contact pairs under alternating temperature, humidity, and current conditions. Through experimentation, the wear rate and microtopography of the worn surface were analyzed under various constant parameters. Subsequently, the differences in tribological behavior and current-carrying characteristics of the contact pairs under these three parameters were explored. The results revealed that the decrease in temperature resulted in a significant increase in the friction coefficient of the contact pairs, carbon wear, and copper surface roughness. Additionally, the surface oxidation rate was lower at lower temperatures. Moreover, contact resistance did not consistently increase with decreasing temperature, owing to the combined action of the contact area and the oxide film. Compared with temperature, humidity fluctuations at room temperature exerted less influence on the friction coefficient and contact resistance of the contact pairs. Dry environments rendered carbon materials vulnerable to oxidation and cracking, while excessive humidity fostered abrasive wear and arcing. High-current conditions generally degraded the tribological properties of C/Cu contacts. In the absence of current, the friction coefficient was extremely high, and the copper transfer was high. Under excessive current, copper was susceptible to plowing by carbon micro-bumps and abrasive particles, resulting in a decrease in the friction coefficient. The release of lipids from the carbon surface due to temperature elevation weakened the electrical contact performance and increased the occurrence of arc erosion, thereby exacerbating carbon wear.

关键词： temperature/humidity pantograph-catenary system C/Cu wear current-carrying friction sliding electrical contact

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Copper-catalyzed C(sp)-H aryl amination enables modular synthesis of quinolines and 2-quinolinones

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Science China Chemistry 2024年第2期67卷 595-603页

作者： Yang Gao Haixia li Simin Yang Yanping huo Qian Chen Xianwei li Zhe Wang xiao-Qiang hu School of Chemical Engineering and light Industry Guangdong University of TechnologyGuangzhou510006China Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory Jieyang515200China Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education&hubei Key Laboratory of Catalysis and Materials Science School of Chemistry and Materials ScienceSouth-Central University for NationalitiesWuhan430074China

Herein,we disclose a novel copper-catalyzed C(sp)-H aryl amination of terminal alkynes with anthranils,enabling the rapid generation of highly reactive secondary N-aryl ynamines for the modular synthesis of structurally diverse C2-substituted quinolines and *** in-situ formed carbonyl-ynamines are prone to tautomerize to carbonyl-ketenimines,which can efficiently react with a series of nucleophiles,including amines,alcohols,phenols,thiols,thiophenols,active-methylene compounds,and even water to produce various quinoline derivatives with the generation of H_(2)O as a sole and green *** method also unlocks a practical route to create various quinoline-fused heterocycles and can be successfully applied to the late-stage modification of complex molecules and the concise synthesis of bioactive *** studies reveal a coppercatalyzed inner-sphere nitrene transfer process by using anthranils as novel aryl nitrene precursors.

关键词： copper catalysis anthranils C(sp)-H aryl amination carbonyl-ketenimines quinolines

Study on the atmospheric heat engine efficiency and heat source characteristics of the Qinghai-Tibet Plateau in summer

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Science China Earth Sciences 2024年第1期67卷 117-133页

作者： Yujie li xiaoqing GAO Yaoming MA Zeyong hu Zhenchao li liwei YANG xiao JIN Xiyin ZHOU Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions of Chinese Academy of Sciences Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China Tianjin Key Laboratory for Oceanic Meteorology Tianjin Institute of Meteorological ScienceTianjin 300074China Institute of Tibetan Plateau Research Chinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China

There are many types of atmospheric heat engines in land-air *** accurate definition,calculation and interpretation of the efficiency of atmospheric heat engines are key to understanding energy transfer and transformation of landair *** atmosphere over the Qinghai-Tibet Plateau(QTP)in summer can be regarded as a positive heat *** study of the heat engine efficiency is helpful to better understand land-air interaction and thermal-dynamic processes on the *** also provides a new perspective to explain the impact of the QTP on the climate of China,East Asia and even the *** this paper,we used MOD08 and ERA5 reanalysis data to calculate the atmospheric heat engine efficiency,surface heat source and atmospheric heat source on the QTP in summer(May to September)from 2000 to *** average atmospheric heat engine efficiency on the QTP in summer from 2000 to 2020 varies between 1.2%and 1.5%,which is less than 1.6%;the heat engine efficiency in summer is higher than that in June,July and August;the Qaidam Basin is the region with the highest atmospheric heat engine efficiency,followed by the western *** mean surface heat source on the QTP in summer from 2000 to 2020 is 96.0 W m^(−2),the atmospheric heat source is 90.7 W m^(−2),and the release of precipitation condensation latent heat is the most important component of the atmospheric heat source on the QTP in *** is a strong and significant positive correlation between the atmospheric heat engine efficiency and the surface heat source on the QTP in *** precipitation condensation latent heat is the most important component of the atmospheric heat source in summer and can reflect the precipitation *** is a strong and significant negative correlation between the atmospheric heat engine efficiency and the atmospheric heat source on the QTP in summer.

关键词： Qinghai-Tibet Plateau Climate change Land-air system Atmospheric heat engine Heat source on the Qinghai-Tibet Plateau