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Journal of Materials Science & Technology 2023年第7期138卷 245-255页

作者： Dian Yang Jun-Ru Tao Yi Yang qian-ming He ming Wang Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing School of Chemistry and Chemical EngineeringSouthwest UniversityChongqing 400715China

Lightweight and high-efficiency microwave shielding materials based on high absorption loss are the hotspot of current ***,the silver-cobalt bimetallic hollow microspheres(Ag-Co-HM)with low reflection loss and broadband absorption efficiency were fabricated and then used to construct bimetallic hollow structures in polydimethylsiloxane/carbon nanotube composites(PDMS/CNT)to obtain the lightweight and absorption-type microwave shielding *** microwave absorption of Ag-Co-HM and the microwave shielding effectiveness(SE T)of the PDMS/CNT/Ag-Co-HM composites was evaluated and *** Ag-Co-HM with a molar ratio(Co/Ag)of 2.07 exhibited a low reflection loss as-46.6 dB at a thickness of 2.6 mm,and an effective absorption bandwidth of 8.40 *** SE T of the PDMS/CNT composites was greatly enhanced by the incorporation of the ***,the absorption coefficient(A)was also improved by adding the Ag-Co-HM and was much higher than the reflection *** composites exhibited absorption-type microwave shielding *** example,the average microwave SE T of 59.4 dB and A value of 0.78 are achieved in the PDMS/CNT/Ag-Co-HM composites containing 5 wt%CNTs and 10 wt%Ag-Co-HMs,which are much higher than the cor-responding values of 33.7 dB and 0.63 in the PDMS/CNT composites with only 5 wt%*** addition,the hollow structure of Ag-Co-HM endows the PDMS/CNT/Ag-Co-HM composites to have a low density.

关键词： Microwave shielding Absorption loss Lightweight Polydimethylsiloxane Carbon nanotube

Prediction of thermal fatigue life of a turbine nozzle guide vane

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2011年第3期12卷 214-222页

作者： xin-qian ZHENG Tao DU Yang-jun ZHANG State Key Laboratory of Automotive Safety and Energy Tsinghua University Beijing 100084 China Bering Power Macklnery Research Institute Beijing 100074 China

Thermal fatigue (TF) is one of the most important factors that influence turbine's *** paper establishes a 3D solid-fluid coupling model for a steady temperature analysis of a high-pressure turbine nozzle at different turbine inlet gas total temperatures (TIGTTs).The temperature analysis supplies the temperature load for subsequent 3D finite element analysis to obtain the strain *** this,the prediction of the TF life is made on the basis of equivalent strain *** results show that the strain increases with TIGTT,and the predicted TF life decreases *** life prediction was confirmed by one TF test.

关键词： Engine Nozzle guide vane Thermal fatigue (TF) life Solid-fluid

Extraction of rare earth ions from phosphate leach solution using emulsion liquid membrane in concentrated nitric acid medium

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Journal of Rare Earths 2018年第11期36卷 1190-1197页

作者： qianlin Chen xin Ma xin Zhang Yunqi Liu ming Yu School of Chemistry and Chemical Engineering Cuizhou University Guiyang 550003 China Guizhou Engineering & Technology Research Center of Clean Production in Phosphorus Chemical Industry Guiyang 550003 China

It is very significant to recover rare earths （REs） from wet-process phosphoric acid, in terms of extraction rate and selectivity, the current carrier di（2-ethlhexly） phosphate （D2EHPA） out there is still inferior. Based on this question, our team modified D2EHPA to synthesize new extractants. This paper presents a comprehensive study on the extraction of rare earth ions （RE3＋） from phosphate leach solution using emulsion liquid membrane （ELM） in concentrated nitric acid medium. The ELM system is made up of （RO）2P（O）OPh-COOH as carrier, polyisocrotyl succinimide （T154） as surfactant, sulfonated kerosene as diluent, phosphoric acid （H3PO4） as stripping solution. Different chemical parameters such as type and concentration of carrier, surfactant, stripping solution, volume ratio of oil phase to internal phase, and volume ratio of emulsion ratio to external phase were analyzed. The extraction of RE^3＋ was evaluated by the yield of extraction. In addition, the demulsification process was also investigated. The proposed method of ELM using （RO）2P（O）OPh-COOH as carrier can he expected to provide an efficient, simplify operation, and facilitated method for extractine RE^3＋.

关键词： Emulsion liquid membrane Rare earth Nitric acid Extraction rate Phosphate rock Stripping solution

Wave-shaped microfluidic chip assisted point-of-care testing for accurate and rapid diagnosis of infections

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Military Medical Research 2022年第5期9卷 553-564页

作者： Bin-Feng Yin xin-Hua Wan ming-Zhu Yang Chang-Cheng qian A.S.M.Muhtasim Fuad Sohan School of Mechanical Engineering Yangzhou UniversityYangzhou 225127JiangsuChina Department of Biochemistry Institute of Basic Medical SciencesChinese Academy of Medical Sciences(CAMS)and Peking Union Medical CollegeBeijing 100005China

Background:Early diagnosis and classification of infections increase the cure rate while decreasing complications,which is significant for severe infections,especially for war ***,traditional methods rely on laborious operations and bulky *** the other hand,point-of-care(POC)methods suffer from limited robustness and ***,it is of urgent demand to develop POC devices for rapid and accurate diagnosis of infections to fulfill on-site militarized ***:We developed a wave-shaped microfluidic chip(WMC)assisted multiplexed detection platform(WMC-MDP).WMC-MDP reduces detection time and improves repeatability through premixing of the samples and reaction of the *** further combined the detection platform with the streptavidin–biotin(SA-B)amplified system to enhance the sensitivity while using chemiluminescence(CL)intensity as signal *** realized simultaneous detection of C-reactive protein(CRP),procalcitonin(PCT),and interleukin-6(IL-6)on the detection platform and evaluated the sensitivity,linear range,selectivity,and ***,we finished detecting 15 samples from volunteers and compared the results with commercial ELISA ***:Detection of CRP,PCT,and IL-6 exhibited good linear relationships between CL intensities and concentrations in the range of 1.25–40μg/ml,0.4–12.8 ng/ml,and 50–1600 pg/ml,*** limit of detection of CRP,PCT,and IL-6 were 0.54μg/ml,0.11 ng/ml,and 16.25 pg/ml,***-MDP is capable of good adequate selectivity and *** whole detection procedure takes only 22 min that meets the requirements of a POC *** of 15 samples from volunteers were consistent with the results detected by commercial ELISA ***:WMC-MDP allows simultaneous,rapid,and sensitive detection of CRP,PCT,and IL-6 with satisfactory selectivity and repeatability,requiring minimal ***,WMC-MDP takes advantage of being a microfluidic device sh

关键词： Point-of-care testing(POCT) Infection markers Wave-shaped microfluidic chip Chemiluminescence Multiplex detection

Stage Division and Pattern Discovery of Complex Patient Care Processes

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Journal of Systems Science & Complexity 2017年第5期30卷 1136-1159页

作者： WANG Tingyan TIAN xin YU ming QI xin YANG Lan Health Care Services Research Center Department of Industrial EngineeringTsinghua UniversityBeijing 100084China Research Center on Fictitious Economy and Data Science Chinese Academy of SciencesBeijing 100190China School of Economics and Management University of Chinese Academy of SciencesBeijing 100190China Health Care Serv-ices Research Center Department of Industrial EngineeringTsinghua UniversityBeijing 100084China

This paper studies the design of a clinical pathway that defines medical service activities within each stage of a patient care process. Much prior research has developed clinicM process models that consider the trajectory of services occurring in a care process, by using data mining techniques on process execution logs. A novel approach that provides a more efficient way of clinical pathway design is introduced in this paper. Based on the strategy of TEI@I methodology, the proposed approach integrates statistical methods, optimization techniques and data mining. With the preprocessed data, a complex care process is subsequently divided into several medical stages, and then the patterns of each stage are identified, and thus a clinical pathway is developed. Finally, the proposed method is applied to the real world, using archival data derived from a hospital in Beijing, about three diseases that involve various departments, with an average of 300 samples for each disease. The results of real- world applications demonstrate that the proposed method can automatically and efficiently facilitate clinical pathways design. The main contributions to the field in this paper include （a） a new application of TEI@I methodology in healthcare domain, （b） a novel method for complex processes analysis, （c） tangible evidence of automatic clinical pathways design in the real world.

关键词： Clinical pathway frequent pattern mining stage division TEI@I virtual business.

Observation of Rydberg Series in Sodium Vapour by Two-Photon Resonant Nondegenerate Four-Wave Mixing

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Chinese Physics Letters 2001年第9期18卷 1202-1204页

作者： WANG Yan-Bang JIANG qian LI Long MI xin YU Zu-He FU Pan-ming Laboratory of Optical Physics Institute of Physics and Center for Condensed Matter PhysicsChinese Academy of SciencesBeijing 100080

We apply two-photon resonant nondegenerate four-wave mixing with a resonant intermediate state for the obser- vation of Rydberg states in sodium vapour. The broadening and shift of the sodium 3S- 11D transition perturbed by argon are investigated. This technique can achieve Doppler-free resolution of narrow spectral structures of Rydberg levels if lasers with narrow bandwidths are employed.

关键词： Rydberg degenerate resonant

Flexible scheduling model of crude oil operations under crude supply disturbance

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Science China Chemistry 2009年第3期52卷 387-400页

作者： ming Pan Yu qian XiuXi Li School of Chemical and Energy Engineering South China University of Technology Guangzhou 510640 China

Today’s changeable market and resultant disturbance of crude oil supply require agile and flexible scheduling of crude oil operation. The objective of flexible scheduling is to keep stable crude oil op-eration and satisfy production demands under the circumstances of supply disturbance. In this paper, a new mixed integer non-linear programming (MINLP) formulation is set up for crude oil scheduling firstly, and then some heuristic rules worked out by some experts are proposed to linearize bilinear terms and prefix some binary variables in the MINLP model. These rules not only reduce the complexity of the MINLP model, but also can be used to solve the scheduling problems in various conditions. In case study, the new model with heuristic rules and the best models reported in the literature are com-pared and evaluated in three benchmark examples in the normal situation, and then three abnormal situations of supply delay are considered based on the new approach. The results of case study show that the new flexible approach can handle crude oil scheduling problems efficiently in both normal and abnormal conditions.

关键词： safety of crude supply crude oil operation flexible scheduling mathematical model safety stock

Domination Numbers of Undirected Toroidal Mesh

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Acta Mathematica Sinica,English Series 2012年第3期28卷 453-462页

作者： xin XIE Jun ming XU Department of Mathematics Huangshan University Department of Mathematics University of Science and Technology of China

The （d, m）-domination number γd,m is a new measure to characterize the reliability of resources-sharing in fault tolerant networks, in some sense, which can more accurately characterize the reliability of networks ... 详细信息

关键词： Undirected toroidal mesh reliability m-diameter domination number

Experimental and numerical studies on the cavitation over flat hydrofoils with and without obstacle

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Journal of Hydrodynamics 2019年第4期31卷 708-716页

作者： Ling-xin Zhang ming Chen Jian Deng Xue-ming Shao The State Key Laboratory of Fluid Power and Mechatronic Systems Department of Mechanics Zhejiang University Hangzhou 310027 China Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province Hangzhou 310027 China

To control the shedding of cavitation, an obstacle is placed on the surface of a flat hydrofoil. Both experimental and numerical studies are carried out. Images of cavitation evolution are recorded by a high-speed camera. 3-D simulations are performed to investigate the cavitating flows around the hydrofoil. The results show that the re-entrant jet plays an important role during the process of cavitation shedding. A kind of U-type shedding is identified during the evolution of the cloud cavitation. The length of the cavity is apparently reduced due to the placement of the obstacle. It is interesting to find that the cavitation shedding changes from the large-scale mode to a small-scale mode, as an obstacle is placed on the hydrofoil surface. As we can observe from both experimental and numerical results, the small-scale cavitation shedding dominates the cavitating flow dynamics, we thereby conclude that the placement of an obstacle is favorable for the inhibition of cavitation shedding.

关键词： Cloud cavitation obstacle re-entrant jet

A Uqp(u1,1) Model for Vibrational Molecular Spectra

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Chinese Physics Letters 1996年第10期13卷 721-723页

作者： ZHOU Huan-qiang ZHANG xin-ming CCAST(World Laboratory) P.O.Box 8730Beijing 100080 Department of Physics Chongqing UniversityChongqing 630044 Department of Physics Qujing Teachers CollegeQujingYunnan 655000

A Uqp(u1,1)model is presented for describing vibrational spectra of diatomic *** model is tested on the vibrational spectra in the X1Σg+state of H2 obtained through the Rydberg-Klein-Rees method.

关键词： method. vibrational spectra