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一次性避光输液器避光性能的研究

塑料助剂 2024年第1期 36-39页

作者：焦西斌范要民路丹河南曙光汇知康生物科技股份有限公司河南漯河462000 漯河市源汇区第一人民医院河南漯河462000

研究影响一次性使用避光输液器避光性能的因素,确定影响产品避光性能的主要技术参数,保证避光输液器产品的质量。采用双层共挤(吹)塑工艺,加入避光剂的管路/滴斗外层不接触药液,接触药液的管路/滴斗内层不含避光剂,规避避光剂与药物的... 详细信息

研究影响一次性使用避光输液器避光性能的因素,确定影响产品避光性能的主要技术参数,保证避光输液器产品的质量。采用双层共挤(吹)塑工艺,加入避光剂的管路/滴斗外层不接触药液,接触药液的管路/滴斗内层不含避光剂,规避避光剂与药物的接触反应和药物的遇光分解,影响疗效;保持避光剂占成型基料聚氯乙烯的质量分数(简称避光剂浓度)不变,调节避光层(管路/滴斗外层)厚度,检测管路/滴斗的透光率,确定避光层的合理厚度;保持避光层厚度不变,调节避光剂浓度,检测管路/滴斗的透光率,确定合理的避光剂浓度;综合比较,确定避光输液器合理的主要技术参数及产品避光性能。避光剂浓度保持不变,管路/滴斗透光率与避光层厚度成反比,当避光剂浓度为0.2.%,避光层厚度≥0.40mm,管路/滴斗透光率符合标准要求;避光层厚度保持不变,管路/滴斗透光率与避光剂浓度成反比,当避光层厚度为0.45 mm,避光剂比例在0.2.%,避光率符合标准要求。一次性使用避光输液器采用双层共挤(吹)塑工艺生产,避光剂浓度控制在0.2.%,输液管路/滴斗避光层厚度控制在(0.45±0.05)mm,管路内层控制在(0.2.±0.05)mm,避光输液器产品的性能符合技术要求。

关键词：避光输液器双层共挤(吹)塑工艺避光剂透光率

“集中管理+分散收治”日间手术管理模式经验分享

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华西医学 2024年第2期39卷 279-282页

作者：吕砚青展翔段希斌郑州大学附属郑州中心医院日间医疗管理办公室郑州450007

规范开展日间手术可显著提高医院医疗效率,降低医疗成本,提升患者满意度。郑州大学附属郑州中心医院针对日间手术管理的难点和运行“堵点”,参考结合国内外已有的日间手术收治模式,形成适合医院的“集中管理+分散收治”日间手术模式。... 详细信息

规范开展日间手术可显著提高医院医疗效率,降低医疗成本,提升患者满意度。郑州大学附属郑州中心医院针对日间手术管理的难点和运行“堵点”,参考结合国内外已有的日间手术收治模式,形成适合医院的“集中管理+分散收治”日间手术模式。该文详细介绍了该管理模式的管理架构、运行流程、延伸服务等,为日间手术诊疗流程优化和医疗服务效率提升提供思路。

关键词：日间手术集中管理分散收治运行管理流程管理

Plate-Like Flexible Spacecraft Modeling and Distribution of Control Moment Gyroscopes

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Space(Science & Technology) 2023年第1期3卷 464-477页

作者： Jingyu Guo Chengfei Yue Shiyuan Jia xibin Cao Research Center of Satellite Technology Harbin Institute of TechnologyHarbinChina Institute of Space Science and Applied Technology Harbin Institute of TechnologyShenzhenShenzhenChina School of Automation Beijing University of Posts and TelecommunicationsBeijingChina

This study investigates the optimization configuration problem of control moment gyroscopes for flexible vibration suppression of large space ***,the structural dynamic model of an unconstrained plate-like flexible spacecraft with control moment gyroscopes is established using the Lagrangian method and the finite element ***,an optimization problem is established with the positions of control moment gyroscope array as variables and the linear quadratic index of mechanical energy during vibration process as the objective ***,an improved gray wolf optimizer is used to solve the optimization *** optimization results show that the control moment gyroscopes should be primarily placed on the corners of the spacecraft in a symmetrical ***,the priority of control moment gyroscope installation positions was studied using topological *** results indicate that the control moment gyroscopes should be primarily installed on the corners,followed by the central positions,and then gradually expanded outward.

关键词： function positions corners

Grain size regulation for balancing cycle performance and rate capability of LiNi_(0.9)Co_(0.055)Mn_(0.045)O_(2. single crystal nickel-rich cathode materials

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Journal of Energy Chemistry 2022年第2期31卷 681-687页

作者： Jiapei Wang xibin Lu Yingchao Zhang Jiahui Zhou Jiexi Wang Shengming Xu Institute of Nuclear and New Energy Technology Tsinghua UniversityBeijing 100084China Hunan ShanShanEnergy Technology Co. LTDChangsha 410006HunanChina State Key Laboratory for Powder Metallurgy&School of Metallurgy and Environment Central South UniversityChangsha 410083HunanChina Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education Tsinghua UniversityBeijing 100084China Beijing Key Lab of Fine Ceramics Tsinghua UniversityBeijing 100084China

It is challenging to balance the cyclability and rate capability of single crystal nickel-rich cathode materials(Ni>0.8).Multicomponent oxides by spray pyrolysis shows potential as highly-reactive precursors to synthesize single crystal nickel-rich cathode at lower temperature,yet Ni^(2.)will severely inhibit particle growth when Ni content exceeds ***,lithium nitrate(LiNO_(3))with low melting point and strong oxidation is introduced as collaborate lithium salts for fabrication of well-dispersed submicron and micron single crystal LiNi_(0.9)Co_(0.055)Mn_(0.045)O_(2.(NCM90)cathode without extra unit *** changing amount of LiNO_(3),particle size regulation is realized and cation disorder can be *** as-prepared material with optimal content of 4 wt%LiNO_(3)(NCM90-4 LN)displays the most appropriate particle size(1μm)with approximately stoichiometric structure,and presents better kinetics characterization of lithium-ion diffusion(15%higher than NCM90)and good electrochemical performance with specific discharge capacity of 2.0.6 and 173.8 mAh g^(-1) at 0.1 C and 10 C at room temperature,*** work broadens the conventional research methodology of size regulation for single crystal Ni-rich cathode materials and is indispensable for the development of designing principal of nickel-rich cathode materials for lithium-ion batteries.

关键词： Single crystal LiNi_(0.9)Co_(0.055)Mn_(0.045)O_(2. Spray pyrolysis Lithium nitrate Lithium-ion batteries

Modeling of the minimum cutting thickness in micro cutting with consideration of the friction around the cutting zone

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Frontiers of Mechanical Engineering 2020年第1期15卷 81-88页

作者： Tianfeng ZHOU Ying WANG Benshuai RUAN Zhiqiang LIANG xibin WANG Key Laboratory of Fundamental Science for Advanced Machining Beijing Institute of TechnologyBeijing 100081China School of Mechanical Engineering Beijing Institute of TechnologyBeijing 100081China

Friction modeling between the tool and the workpiece plays an important role in predicting the minimum cutting thickness during TC4 micro machining and finite element method(FEM)cutting *** this study,a new three-region friction modeling is proposed to illustrate the material flow mechanism around the friction zone in micro cutting;estimate the stress distributions on the rake,edge,and clearance faces of the tool;and predict the stagnation point location and the minimum cutting *** friction modeling is established by determining the distribution of normal and shear ***,it is applied to calculate the stagnation point location on the edge face and predict the minimum cutting *** stagnation point and the minimum cutting thickness are also observed and illustrated in the FEM *** cutting experiments are conducted to validate the accuracy of the friction and the minimum cutting thickness *** results show that the proposed friction model illustrates the relationship between the normal and sheer stress on the tool surface,thereby validating the modeling method of the minimum cutting thickness in micro cutting.

关键词： tool friction minimum cutting thickness finite element method tool edge radius micro cutting

Gravitation induced shrinkage of Mercury's orbit

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Chinese Physics B 2020年第10期29卷 598-600页

作者： Moxian Qian xibin Li Yongjun Cao College of physics and electronic infoimation Inner Mongolia Normal UniversityHohhot 010022China

In general relativity, Mercury's orbit becomes approximately elliptical and the its perihelion has thus an additional advance. We demonstrate, meanwhile, that in comparison of those given by Newton's theory of gravitation for the orbit of the Mercury, the circumference and the area are reduced by 40.39 km and 2.35 × 10^9 km^2. respectively, besides the major-axis contraction pointed out recently, and all are produced by the curved space within Einstein's theory of gravitation. Since the resolution power of present astronomical distance measurement technology reaches one kilometer, the shrinkage of Mercury's orbit can then be observable.

关键词： Mercury's orbit gravitational field general relativity

Monocular vision-based iterative pose estimation algorithm from corresponding feature points

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Science China(Information Sciences) 2010年第8期53卷 1682-1696页

作者： ZHANG ShiJie 1 , CAO xibin 1 , ZHANG Fan 1 & HE Liang 2.1 Research Center of Satellite Technology, Harbin Institute of Technology, Harbin 150080, China 2.Shanghai Aerospace Control Engineering Institute, Shanghai 2.02.3, China Research Center of Satellite Technology Harbin Institute of Technology Harbin China Shanghai Aerospace Control Engineering Institute Shanghai China

To determine the relative pose between an object and a single camera using 2.-to-3D point correspondences, a kind of iterative methods based on inverse projection ray approach is proposed. An iterative algorithm which is divided into depth recovery stage and absolute orientation stage is also proposed. In the first stage, the optimal translation vector is first computed in terms of rotation matrix via least square method, then the depths of the observed points are estimated by projecting the estimated point orthogonally to the inverse projection ray defined by the image point, and finally 3D points are reconstructed using the estimated depths from previous step. In the second stage, the optimal rotation matrix is estimated by applying Umeyama algorithm to fitting of the 3D model points and 3D estimated points. The above two stages are repeated until the result converges. The global convergence of the two-stage iterative algorithm is proven based on the global convergence theorem. Finally, a spacecraft docking application is implemented to test the effectiveness and convergence of the proposed algorithm by mathematical simulation and physical simulation.

关键词： monocular vision feature point relative pose two-stage iterative algorithm global convergence

Integrated importance measure for multi-state coherent systems of k level

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Journal of Systems Engineering and Electronics 2013年第6期24卷 1029-1037页

作者： xibin Zhao Shubin Si Hongyan Dui Zhiqiang Cai Shudong Sun Key Laboratory for Information System Security of Ministry of Education School of SoftwareTsinghua University Ministry of Education Key Laboratory of Contemporary Design and Integrated Manufacturing Technology School of MechatronicsNorthwestern Polytechnical University

To verify the effectiveness of the integrated importance measure （IIM） for multi-state coherent systems of k level, the definition and physical meaning of IIM are demonstrated. Then, the improvement potential and Δ-importance measures are generalized to multi-state coherent systems based on the system performance level, and the relationships between IIM and traditional importance measures are discussed. The characteristics of IIM are demonstrated in both series and parallel systems. Also, an application to an oil transportation system is given. The comparison results show that：（i） IIM has some useful properties that are not possessed by traditional importance measures; （ii） IIM is effective in evaluating the component role in multi-state systems when the component reliability and the failure rate are simultaneously considered.

关键词： multi-state coherent system system performance level integrated importance measure system reliability

A novel model to evaluate spatial structure in thinned conifer-broadleaved mixed natural forests

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林业研究:英文版 2023年第6期34卷 1881-1898页

作者： Hui Liu xibin Dong Yuan Meng Tong Gao Liangliang Mao Ran Gao Key Laboratory of Sustainable Forest Management and Environmental Microorganism Engineering of Heilongjiang Province Northeast Forestry UniversityHarbin 150040People’s Republic of China

In order to ensure the effective analysis and reconstruction of forests,it is key to ensure the quantitative description of their spatial *** this paper,a distance model for the optimal stand spatial structure based on weighted Voronoi diagrams is *** particular,we provide a novel methodological model for the comprehensive evaluation of the spatial structure of forest stands in natural mixed conifer-broadleaved forests and the formulation of management decision *** applicability of the rank evaluation and the optimal solution distance model are compared and assessed for different standard sample plots of natural mixed conifer-broadleaved *** effect of crown width on the spatial structure unit of the trees is observed to be higher than that of the diameter at breast ***,the influence of crown length is greater than that of tree *** are nine possible spatial structure units determined by the weighted Voronoi diagram for the number of neighboring trees in the central tree,with an average intersection of neighboring crowns reaching 80%.The rank rating of natural forest sample plots is correlated with the optimal solution distance model,and their results are generally consistent for natural ***,the rank rating is not able to provide a quantitative *** optimal solution distance model is observed to be more comprehensive than traditional methods for the evaluation of the spatial structure of forest *** can effectively reflect the trends in realistic stand spatial structure factors close to or far from the ideal structure point,and accurately assesses the forest spatial *** proposed optimal solution distance model improves the integrated evaluation of the spatial structure of forest stands and provides solid theoretical and technical support for sustainable forest management.

关键词： Weighted Voronoi diagram Optimal distance model Spatial structure quantifi cation Thinning intensity Conifer-broadleaved mixed natural forests