检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

公立医院财务精细化管理的必要性及措施

时代经贸 2020年第14期18卷 22-23页

作者：郑敬月邯郸市眼科医院(邯郸市第三医院) 河北邯郸056001

基于医疗卫生体制改革深化的背景下,公立医院的财务管理工作也面临着更多的挑战。当前形势下,粗放的财务管理模式已无法满足现代医院健康可持续发展,为更好地应对日益激烈的竞争环境,实现医院社会效益和经济效益的最大化,医院财务管理... 详细信息

基于医疗卫生体制改革深化的背景下,公立医院的财务管理工作也面临着更多的挑战。当前形势下,粗放的财务管理模式已无法满足现代医院健康可持续发展,为更好地应对日益激烈的竞争环境,实现医院社会效益和经济效益的最大化,医院财务管理需要引入精细化管理理念,以此来不断增强财务管理力度,进而实现现代化医院管理要求。本文从医院财务管理现状进行阐述,充分了解医院财务精细化管理的必要性,并在此基础提出相应管理措施。

关键词：医院财务管理精细化管理成本管理财务信息化

基于SEM模型的网约车乘客安全感知建模与分析

在线全文

学校读者我要写书评

暂无评论

交通信息与安全 2017年第6期35卷 85-92页

作者：陈雨王颖聂琼郑靖越丁川北京航空航天大学交通科学与工程学院北京100191 伊利诺伊大学厄巴纳-香槟分校应用健康科学学院厄巴纳香槟61820 清华大学工业工程系北京100084

近年来,网约车快速发展,但其运行过程中隐藏的乘客安全问题愈发凸显。为探究乘客对于网约车乘坐过程的安全感知情况,利用鱼骨图将安全问题划分为交通安全、信息安全、人身财产安全3个维度,并以此为基础设计并进行问卷调查。为刻画不同... 详细信息

近年来,网约车快速发展,但其运行过程中隐藏的乘客安全问题愈发凸显。为探究乘客对于网约车乘坐过程的安全感知情况,利用鱼骨图将安全问题划分为交通安全、信息安全、人身财产安全3个维度,并以此为基础设计并进行问卷调查。为刻画不同潜变量之间的复杂关系,构建了基于结构方程模型(SEM)的逻辑框架,揭示了个人特征、事故经历、安全知识以及冒险倾向等因素对网约车乘客安全感知的影响路径及显著性。结果表明,乘客的安全知识、事故经历以及冒险倾向对网约车乘客的安全感知有显著的直接影响;性别、收入水平等个人特征亦显著影响网约车乘客的安全感知。研究结果可为网约车安全管理相关政策的制定提供理论依据。

关键词：交通安全网约车安全感知结构方程模型潜变量

Local L^(2) theory of the fractional Navier-Stokes equations and the self-similar solution

在线全文

学校读者我要写书评

暂无评论

Science China Mathematics 2023年第3期66卷 503-570页

作者： Baishun Lai jingyue Li Xiaoxin zheng Key Laboratory of Computing and Stochastic Mathematics(Ministry of Education) School of Mathematics and StatisticsHunan Normal UniversityChangsha 410081China Institute of Applied Physics and Computational Mathematics Beijing 100088China School of Mathematical Sciences Beihang UniversityBeijing 100191China

This paper is concerned with two aspects of the fractional Navier-Stokes equation. First, we establish the local L^(2)theory of the hypo-dissipative Navier-Stokes system. More precisely, the existence of local-in-time as well as global-in-time local energy weak solutions to the hypo-dissipative Navier-Stokes system is *** particular, in order to construct a pressure with an explicit representation, some technical innovations are required due to the lack of known results on the local regularity of the non-local Stokes operator. Secondly, as an important application to the local L^(2)theory, we give a second construction of large self-similar solutions of the hypo-dissipative Navier-Stokes system along with the Leray-Schauder degree theory.

关键词： local energy weak solution self-similar solution Leray-Schauder degree theory

Modulated-ISRJ rejection using online dictionary learning for synthetic aperture radar imagery

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Engineering and Electronics 2024年第2期35卷 316-329页

作者： WEI Shaopeng ZHANG Lei LU jingyue LIU Hongwei College of Oceanography and Space Informatics China University of Petroleum(East China)Qingdao 266580China School of Electronics Engineering Xidian UniversityXi’an 710071China School of Electronics and Communication Engineering Shenzhen Campus of Sun Yat-sen UniversityGuangzhou 518107China School of Computer Science and Technology Xidian UniversityXi’an 710071China

In electromagnetic countermeasures circumstances,synthetic aperture radar(SAR)imagery usually suffers from severe quality degradation from modulated interrupt sampling repeater jamming(MISRJ),which usually owes considerable coherence with the SAR transmission waveform together with periodical modulation *** paper develops an MISRJ suppression algorithm for SAR imagery with online dictionary *** the algorithm,the jamming modulation temporal properties are exploited with extracting and sorting MISRJ slices using fast-time *** dictionary learning is followed to separate real signals from jamming *** the learned representation,time-varying MISRJs are suppressed *** simulated and real-measured SAR data are also used to confirm advantages in suppressing time-varying MISRJs over traditional methods.

关键词： synthetic aperture radar(SAR) modulated interrupt sampling jamming(MISRJ) online dictionary learning

Numerical study on shock-dusty gas cylinder interaction

在线全文

学校读者我要写书评

暂无评论

Acta Mechanica Sinica 2019年第4期35卷 740-749页

作者： jingyue Yin Juchun Ding Xisheng Luo Xin Yu Beijing Institute of Applied Physics and Computational Mathematics Beijing 100094 China Advanced Propulsion Laboratory Department of Modern Mechanics University of Science and Technology of China Hefei 230026 China

The interaction of a planar shock wave with a dusty-gas cylinder is numerically studied by a compressible multi-component solver with an adaptive mesh refinement technique. The influence of non-equilibrium effect caused by the particle relaxation, which is closely related to the particle radius and shock strength, on the evolution of particle cylinder is emphasized. For a very small particle radius, the particle cloud behaves like an equilibrium gas cylinder with the same physical properties as those of the gas-particle mixture. Specifically, the transmitted shock converges continually within the cylinder and then focuses at a region near the downstream interface, producing a local high pressure zone followed by a particle jet. Also, noticeable secondary instabilities emerge along the cylinder edge and the evident particle roll-up causes relatively large width and height of the shocked cylinder. As the particle radius increases, the flow features approach those of a frozen flow of pure air, e.g., the transmitted shock propagates more quickly with a weaker strength and a smaller curvature, resulting in an increasingly-weaken shock focusing and particle jet. Also, particles would escape from the vortex core formed at late stages due to the larger inertia, inducing a greater particle dispersion. It is found that a large particle radius as well as a strong incident shock can facilitate such particle escape. The theory of Luo et al.(J. Fluid Mech., 2007) combined with the SZ circulation model ( J. Fluid Mech., 1994) can reasonably explain the high dependence of particle escape on the particle radius and shock strength.

关键词： Dusty-gas cylinder Non-equilibrium effect Shock wave Instability

AlCl_(3)modified Pd/Al_(2)O_(3)catalyst for enhanced anthraquinone hydrogenation

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2023年第12期64卷 271-280页

作者： Qinqin Yuan jingyue Liang Wei Li Jinli Zhang Cuili Guo School of Chemical Engineering and Technology Tianjin UniversityTianjin 300350China

Anthraquinone hydrogenation to produce H_(2)O_(2) is an economically interesting reaction with great industrial ***,we report a series of Pd/xAl catalysts with different AlCl_(3) contents by a conventional stepwise impregnation *** optimal Pd/1.0Al catalyst exhibits a higher performance toward anthraquinone hydrogenation with 8.3 g·L^(-1)hydrogenation efficiency,99.5%selectivity and good stability,obviously superior to that of Pd/Al_(2)O_(3) catalyst(5.2 g·L^(-1)and 97.2%).Detailed characterization demonstrates that AlCl_(3) can be grafted on the γ-Al_(2)O_(3) support to obtain a modified support with abundant surface weak acid and Lewis acid,which can adsorb and activate ***,its steric hindrance could isolate and disperse active metals to form more active *** synergies between metal sites and acid sites promotes the anthraquinone ***,the good stability after grafting AlCl_(3) could attribute to the enhanced metal-support interaction inhibiting metal particles agglomeration and leaching.

关键词： AlCl_(3) Pd-based catalyst H_(2)O_(2) Weak acid Hydrogenation

Encapsulation of Fe-CoP with P,N-co-doped porous carbon matrix as a multifunctional catalyst for wide electrochemical applications

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2022年第8期31卷 36-44,I0002页

作者： Yuelong Xu Ran Wang jingyue Wang Yaru Zhang Tifeng Jiao State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004HebeiChina Hebei Key Laboratory of Applied Chemistry School of Environmental and Chemical EngineeringYanshan UniversityQinhuangdao 066004HebeiChina Hebei Engineering Research Center for Water Saving in Industry Shijiazhuang 050081HebeiChina nstitute of Energy Resources Hebei Academy of SciencesShijiazhuang 050081HebeiChina

Hydrogen evolution reaction(HER),oxygen evolution reaction(OER),and oxygen reduction reaction(ORR)serve as the most promising electrochemical processes for renewable *** multifunctional electrocatalysts with high performance for HER,OER and ORR still remains a ***,we report a facile method to prepare P,N-co-doped porous carbon encapsulated Fe-CoP(A-FeCoP/CPN)electrocatalyst through freeze drying,carbonization,and KOH *** acquired A-FeCoP/CPN possesses abundant pores with large surface area,which provides sufficient defect-rich sites for HER,OER,and ORR,in alkaline or acidic *** A-Fe-CoP/CPN shows low overpotential and good stability for HER and OER in alkaline *** functional theory(DFT)computations reveal that the addition of Fe greatly facilitates the rate-determining step and overall catalytic pathway for both HER and OER.A-Fe-CoP/CPN also exhibits low half-wave potential(E1/2)for ORR,which indicates an enhanced performance than that of the noble Pt/C ***-air battery equipped with the A-Fe-CoP/CPN catalyst exhibits a high energy density(849 m Ah g^(-1))and a long-time stability at 5 m A cm^(-2).This finding not only offers a facile strategy to prepare porous carbon materials with defect-rich sites,but also provides guidance for developing multifunctional electrocatalysts for wide electrochemical reactions.

关键词： HER OER ORR Multifunctional electrocatalyst Metal-air battery

Research progress on FASN and MGLL in the regulation of abnormal lipid metabolism and the relationship between tumor invasion and metastasis

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Medicine 2021年第5期15卷 649-656页

作者： jingyue Zhang Yawen Song Qianqian Shi Li Fu Tianjin Medical University Cancer Institute and Hospital National Clinical Research Center for CancerKey Laboratory of Cancer Prevention and TherapyTianjinTianjin’s Clinical Research Center for CancerKey Laboratory of Breast Cancer Prevention and TherapyTianjin Medical universityMinistry of EducationTianjin 300060China

Tumorigenesis involves metabolic reprogramming and abnormal lipid metabolism,which is manifested by increased endogenous fat mobilization,hypertriglyceridemia,and increased fatty acid *** acid synthase(FASN)is a key enzyme for the de novo synthesis of fatty acids,and monoacylglycerol esterase(MGLL)is an important metabolic enzyme that converts triglycerides into free fatty *** enzymes play an important role in lipid metabolism and are associated with tumor-related signaling pathways,the most common of which is the PI3K–AKT signaling *** can also regulate the immune microenvironment,participate in epithelial–mesenchymal transition,and then regulate tumor invasion and *** literature have shown that these two genes are abnormally expressed in many types of tumors and are highly correlated with tumor migration and *** article introduces the structures and functions of FASN and MGLL,their relationship with abnormal lipid metabolism,and the mechanism of the regulation of tumor invasion and metastasis and reviews the research progress of the relationship of FASN and MGLL with tumor invasion and metastasis.

关键词： FASN MGLL lipid metabolism tumor invasion metastasis

A critical review on nickel-based cathodes in rechargeable batteries

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2022年第5期29卷 925-941页

作者： Lifan Wang jingyue Wang Leiying Wang Mingjun Zhang Rui Wang Chun Zhan State Key Laboratory of Advanced Metallurgy School of Metallurgical and Ecological EngineeringUniversity of Science and Technology BeijingBeijing 100083China

The 3d transition-metal nickel(Ni)-based cathodes have long been widely used in rechargeable batteries for over 100 years,from Ni-based alkaline rechargeable batteries,such as nickel-cadmium(Ni-Cd)and nickel-metal hydride(Ni-MH)batteries,to the Ni-rich cathode featured in lithium-ion batteries(LIBs).Ni-based alkaline batteries were first invented in the 1900s,and the well-developed Ni-MH batteries were used on a large scale in Toyota Prius vehicles in the *** the same time,however,Sony Corporation commercialized the first LIBs in *** temporally fading as LiCoO_(2) dominated the cathode in LIBs,nickel oxide-based cathodes eventually found their way back to the mainstreaming battery *** uniqueness of Ni in batteries is that it helps to deliver high energy density and great storage capacity at a low *** review mainly provides a comprehensive overview of the key role of Ni-based cathodes in rechargeable *** presenting the physical and chemical properties of the 3d transition-metal Ni,which make it an optimal cationic redox center in the cathode of batteries,we introduce the structure,reaction mechanism,and modification of nickel hydroxide electrode in Ni-Cd and Ni-MH rechargeable *** then move on to the Ni-based layered oxide cathode in LIBs,with a focus on the structure,issues,and challenges of layered oxides,LiNiO_(2),and LiNi_(1−x−y)Co_(x)Mn_(y)O_(2).The role of Ni in the electrochemical performance and thermal stability of the Ni-rich cathode is *** bridging the“old”Ni-based batteries and the“modern”Ni-rich cathode in the LIBs,this review is committed to providing insights into the Ni-based electrochemistry and material design,which have been under research and development for over 100 *** overview would shed new light on the development of advanced Ni-containing batteries with high energy density and long cycle life.

关键词： nickel-based alkaline batteries nickel hydroxide electrodes lithium-ion battery Ni-rich layered oxide cathodes