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天玑骨科手术机器人在创伤骨科领域中的应用综述

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医疗卫生装备 2024年第5期45卷 104-110页

作者：刘申雷同昊顾锋梁向党韦兴梁永辉航天中心医院骨科北京100049 北京大学航天临床医学院北京100049 解放军总医院第一医学中心骨科北京100853

介绍了天玑骨科手术机器人的组成和特点,综述了其在治疗骨盆骨折、髋臼骨折、股骨颈骨折、股骨转子间骨折、跟骨骨折、舟骨骨折等不同部位创伤中的应用现状,分析了天玑骨科手术机器人在创伤骨科领域中的应用优势及不足,指出了天玑骨科... 详细信息

介绍了天玑骨科手术机器人的组成和特点,综述了其在治疗骨盆骨折、髋臼骨折、股骨颈骨折、股骨转子间骨折、跟骨骨折、舟骨骨折等不同部位创伤中的应用现状,分析了天玑骨科手术机器人在创伤骨科领域中的应用优势及不足,指出了天玑骨科手术机器人未来需针对现有技术短板和应用成本进行进一步优化和发展,以推动其在创伤骨科领域的广泛应用。

关键词：天玑骨科手术机器人手术机器人创伤骨科骨折

Microstructure and deuterium resistance of Al_(2)O_(3)/Y_(2)O_(3) composite coating with different annealing atmospheres

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Rare Metals 2022年第3期41卷 877-882页

作者： Wei-Jing Wang Qing-He Yu Xiao-Peng Liu Ke-Zhi Huang Jing Mi lei hao Zheng Lu National Engineering Research Center of Nonferrous Metals Materials and Products for New Energy GRINM Group Co.Ltd.Beijing 100088China GRIMAT Engineering Institute Co. Ltd.Beijing 101407China General Research Institute for Nonferrous Metals Beijing 100088China School of Materials Science and Engineering Northeastern UniversityShenyang 110819China

The Al_(2)O_(3)/Y_(2)O_(3) composite coating with a total thickness of 320 nm was prepared by radio-frequency magnetron *** annealing treatments in three different atmosphere,Ar gas,H;and vacuum,were performed in orde... 详细信息

关键词： coating resistance Microstructure

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贵州宽阔水国家级自然保护区中蜂的形态特征

Physics-data coupling-driven method to predict the penetration depth into concrete targets

中国蜂业 2024年第7期75卷 64-66页

作者：饶永超黄振兴陈胜郝磊刘曼兰洪波杨昌乾刘云李光容杨雪贵州省生物研究所贵阳 550009 贵州省养蜂学会贵阳 550009 贵州省生物研究所贵阳 550009 贵州宽阔水国家级自然保护区管理局绥阳 563300

对来自贵州宽阔水国家级自然保护区内7个区域共21群中华蜜蜂,进行工蜂吻长、右前翅长、右前翅宽、第3背板长、第4背板长等20项形态指标测定,并将与采集力相关的形态数据进行关联性分析.测定结果显示保护区中华蜜蜂工蜂的吻长4.493±0.53... 详细信息

对来自贵州宽阔水国家级自然保护区内7个区域共21群中华蜜蜂,进行工蜂吻长、右前翅长、右前翅宽、第3背板长、第4背板长等20项形态指标测定,并将与采集力相关的形态数据进行关联性分析.测定结果显示保护区中华蜜蜂工蜂的吻长4.493±0.536 mm、右前翅长8.701±0.208 mm、右前翅宽2.970±0.063 mm、第3背板长1.990±0.127 mm、第4背板长1.873±0.091 mm;蜜囊的大小与吻长、右前翅长、右前翅宽显著相关(P＜0.05).研究结果不仅为当地中华蜜蜂种质资源保护提供形态学基础数据,且为蜜蜂良种选育提供科学参考.

关键词：贵州宽阔水国家级自然保护区中华蜜蜂形态特征

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Theoretical & Applied Mechanics Letters 2024年第3期14卷 184-192页

作者： Shuai Qin hao Liu Jianhui Wang Qiang Zhao lei Zhang Institute of Defense Engineering AMSLuoyang 471000China Harbin Engineering University Harbin 150001China

The projectile penetration process into concrete target is a nonlinear complex *** the increase ofexperiment data,the data-driven paradigm has exhibited a new feasible method to solve such complex ***,due to poor quality of experimental data,the traditional machine learning(ML)methods,whichare driven only by experimental data,have poor generalization capabilities and limited prediction ***,this study intends to exhibit a ML method fusing the prior knowledge with experiment *** newML method can constrain the fitting to experimental data,improve the generalization ability and the predic-tion *** results show that integrating domain prior knowledge can effectively improve theperformance of the prediction model for penetration depth into concrete targets.

关键词： Penetration into concrete Artificial neural networks Prior knowledge fusion Prediction model

Realization of Quantum Secure Direct Communication with Continuous Variable

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Research 2024年第2期6卷 159-170页

作者： Zhengwen Cao Yuan Lu Geng Chai hao Yu Kexin Liang lei Wang School of Information Science and Technology Northwest UniversityXi'an710127China

With the progress of theoretical and applied technologies,the communication system based on the classical encryption is seriously threatened by quantum computing and distributed computing.A communication method that directly loads confidential information on the quantum state,quantum secure direct communication(QSDC),came into being for resisting security ***,we report the first continuous-variable QSDC(CV-QSDC)experimental demonstration for verifying the feasibility and effectiveness of the CV-QSDC protocol based on Gaussian mapping and propose a parameter estimation for signal classification under the actual *** our experiment,we provided 4×10^(2) blocks,where each block contains 105 data for direct information *** the transmission distance of 5 km in our experiment,the excess noise is 0.0035 SNU,where SNU represents the unit of shot-noise *** 4.08×10^(5) bit per second experimental results firmly demonstrated the feasibility of CV-QSDC under the fiber *** proposed grading judgment method based on parameter estimation provides a practical and available message processing scheme for CV-QSDC in a practical fiber channel and lays the groundwork for the grading reconciliation.

关键词： quantum estimation verify

Cobalt-nitrogen co-doped porous carbon sphere as highly efficient catalyst for liquid-phase cyclohexane oxidation with molecular oxygen and the active sites investigation

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Frontiers of Chemical Science and Engineering 2024年第3期18卷 101-112页

作者： lei Chen Yuan Sun Jinshan Chi Wei Xiong Pingle Liu Fang hao College of Chemical Engineering National&Local United Engineering Research Centre for Chemical Process Simulation and IntensificationXiangtan UniversityXiangtan411105China

The selective oxidation of cyclohexane to cyclohexanone and cyclohexanol(KA oil)is a challenging issue in the chemical *** present the industrial conversion of cyclohexane to cyclohexanone and cyclohexanol is normally controlled at less than 5%***,the development of highly active and stable catalysts for the aerobic oxidation of cyclohexane is necessary to overcome this low-efficiency ***,we have developed a cobalt-nitrogen co-doped porous sphere catalyst,Co-NC-x(x is the Zn/Co molar ratio,where x=0,0.5,1,2,and 4)by pyrolyzing resorcinol-formaldehyde resin *** achieved 88.28%cyclohexanone and cyclohexanol selectivity and a cyclohexane conversion of 8.88%under *** results showed that the introduction of zinc effectively alleviated the aggregation of Co nanoparticles and optimized the structural properties of the *** addition,Co0 and pyridinic-N are proposed to be the possible active species,and their proportion efficiently increased in the presence of Zn^(2+)*** this study,we developed a novel strategy to design highly active catalysts for cyclohexane oxidation.

关键词： KA oil production cyclohexane selective oxidation cobalt-nitrogen co-doped porous carbon spheres metal-organic framework

Effects of cosolvents on CO_(2) displacement of shale oil and carbon storage

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Petroleum Exploration and Development 2023年第6期50卷 1509-1518页

作者： ZHANG Yifan WANG Lu ZOU Rui ZOU Run MENG Zhan HUANG Liang LIU Yisheng lei hao College of Energy Chengdu University of TechnologyChengdu 610059China State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of TechnologyChengdu 610059China School of Petroleum Engineering Southwest Petroleum UniversityChengdu 610500China Research Institute of Exploration and Development Sinopec Jianghan Oilfield CompanyWuhan 430223China

Molecular dynamics method was used to establish composite wall/inorganic nanopores of three pore sizes, three shale oil systems, five CO_(2)-cosolvent systems, and pure CO_(2) system. The process of CO_(2)-cosolvent displacement of crude oil in shale nanopores and carbon storage was simulated and the influencing factors of displacement and storage were analyzed. It is shown that the attraction of the quartz wall to shale oil increases with the degree of hydroxylation. The higher the degree of quartz hydroxylation, the more difficult it is to extract the polar components of shale oil. Nanopore size also has a great impact on shale oil displacement efficiency. The larger the pore size, the higher the shale oil displacement efficiency. The closer the cosolvent molecules are to the polarity of the shale oil, the higher the mutual solubility of CO_(2) and shale oil. The more the non-polar components of shale oil, the lower the mutual solubility of CO_(2) and shale oil with highly polar cosolvent. Ethyl acetate is more effective in stripping relatively high polar shale oil, while dimethyl ether is more effective in stripping relatively low polar shale oil. Kerogen is highly adsorptive, especially to CO_(2). The CO_(2) inside the kerogen is not easy to diffuse and leak, thus allowing for a stable carbon storage. The highest CO_(2) storage rate is observed when dimethyl ether is used as a cosolvent, and the best storage stability is observed when ethyl acetate is used as a cosolvent.

关键词： molecular dynamics shale oil nanopore carbon dioxide cosolvent displacement efficiency storage effect

Effective photocatalytic hydrogen evolution by Ti_(3)C_(2)-modified CdS synergized with N-doped C-coated Cu_(2)O in S-scheme heterojunctions

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Chinese Journal of Structural Chemistry 2023年第12期42卷 43-51页

作者： Kaihui Huang Boning Feng Xinghua Wen lei hao Difa Xu Guijie Liang Rongchen Shen Xin Li Institute of Biomass Engineering Key Laboratory of Energy Plants Resource and UtilizationMinistry of Agriculture and Rural AffairsSouth China Agricultural UniversityGuangzhou510642China College of Materials and Energy South China Agricultural UniversityGuangzhou510642China Hunan Key Laboratory of Applied Environmental Photocatalysis Changsha UniversityChangsha410022China Hubei Key Lab Low Dimens Optoelect Mat&Devices Hubei University of Arts and ScienceXiangyang441053China

Photocatalytic hydrogen evolution through water splitting holds tremendous promise for converting solar energy into a clean and renewable fuel ***,the efficiency of photocatalysis is often hindered by poor light absorption,insufficient charge separation,and slow reaction kinetics of the *** this study,we designed and synthesized a novel S-scheme heterojunction comprising Ti_(3)C_(2)MXene,CdS nanorods,and nitrogen-doped carbon coated Cu_(2)O(Cu_(2)O@NC)core-shell ***_(3)C_(2)MXene as a cocatalyst enhances the light absorption and charge transfer of CdS ***,the core-shell Cu_(2)O@NC nanoparticles establish a pathway for transferring photogenerated electrons and create a favorable band alignment for efficient hydrogen *** synergistic effects of Ti_(3)C_(2)MXene and Cu_(2)O@NC on CdS nanorods result in multiple charge transfer channels and improved photocatalytic *** optimal hydrogen evolution rate of the Ti_(3)C_(2)-CdS-Cu_(2)O@NC S-scheme heterojunction photocatalyst is 7.4 times higher than that of pure *** techniques and DFT calculations were employed to explore the structure,morphology,optical properties,charge dynamics,and band structure of the *** results revealed that the S-scheme mechanism effectively suppresses the recombination of photogenerated carriers and facilitates the separation and migration of photo-generated electrons and holes to the reaction ***,Ti_(3)C_(2)MXene provides abundant active sites essential for accelerating the surface H_(2)-evolution reaction *** Cu_(2)O@NC core-shell nanoparticles with a large surface area and high stability are closely adhered to CdS nanorods and establish an S-scheme internal electric field with CdS nanorods to drive charge *** investigation provides valuable insights into the rational design of CdS-based photocatalysts,enabling efficient hydrogen production by harnessing the

关键词： Photocatalytic hydrogen evolution Cu_(2)O@NC CdS S-scheme heterojunction Ti_(3)C_(2)MXene cocatalyst

A semi-analytical model for coupled flow in stress-sensitive multi-scale shale reservoirs with fractal characteristics

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Petroleum Science 2024年第1期21卷 327-342页

作者： Qian Zhang Wen-Dong Wang Yu-Liang Su Wei Chen Zheng-Dong lei lei Li Yong-Mao hao Key Laboratory of Unconventional Oil&Gas Development(China University of Petroleum(East China)) Ministry of EducationQingdao266580ShandongChina School of Petroleum Engineering China University of Petroleum(East China)Qingdao266580ShandongChina Shale Oil Development Branch Changqing Oilfield CompanyPetroChinaQingyang745708GansuChina PetroChina Research Institute of Petroleum Exploration&Development Beijing100083China

A large number of nanopores and complex fracture structures in shale reservoirs results in multi-scale flow of oil. With the development of shale oil reservoirs, the permeability of multi-scale media undergoes changes due to stress sensitivity, which plays a crucial role in controlling pressure propagation and oil flow. This paper proposes a multi-scale coupled flow mathematical model of matrix nanopores, induced fractures, and hydraulic fractures. In this model, the micro-scale effects of shale oil flow in fractal nanopores, fractal induced fracture network, and stress sensitivity of multi-scale media are considered. We solved the model iteratively using Pedrosa transform, semi-analytic Segmented Bessel function, Laplace transform. The results of this model exhibit good agreement with the numerical solution and field production data, confirming the high accuracy of the model. As well, the influence of stress sensitivity on permeability, pressure and production is analyzed. It is shown that the permeability and production decrease significantly when induced fractures are weakly supported. Closed induced fractures can inhibit interporosity flow in the stimulated reservoir volume (SRV). It has been shown in sensitivity analysis that hydraulic fractures are beneficial to early production, and induced fractures in SRV are beneficial to middle production. The model can characterize multi-scale flow characteristics of shale oil, providing theoretical guidance for rapid productivity evaluation.

关键词： Multi-scale coupled flow Stress sensitivity Shale oil Micro-scale effect Fractal theory