检索结果-南通市图书馆

Solid electrolyte-electrode interface based on buffer therapy in solid-state lithium batteries

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2021年第10期28卷 1584-1602页

作者： Lei-ying Wang Li-fan Wang Rui Wang Rui Xu Chun zhan Woochul Yang Gui-cheng liu School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China Department of Physics Dongguk UniversitySeoul 04620Republic of Korea

In the past few years,the all-solid lithium battery has attracted worldwide attentions,the ionic conductivity of some all-solid lithium-ion batteries has reached 10^(-3)-10^(-2) S/cm,indicating that the transport of lithium ions in solid electrolytes is no longer a major ***,some interface issues become research *** of these interfacial issues include the electrochemical decomposition reaction at the electrode-electrolyte interface;the low effective contact area between the solid electrolyte and the electrode *** order to solve the issues,researchers have pursued many different *** addition of a buffer layer between the electrode and the solid electrolyte has been at the center of this *** this review paper,we provide a systematic summarization of the problems on the electrode-solid electrolyte interface and detailed reflection on the latest works of buffer-based therapies,and the review will end with a personal perspective on the improvement of buffer-based therapies.

关键词： solid-state lithium-ion batteries solid electrolyte buffer layer interface

分动器用湿式单离合器钢片轴向温度场分布研究

在线全文

学校读者我要写书评

暂无评论

汽车文摘 2024年第6期 45-51页

作者：徐占屠有余刘振宇倪家傲刘伟东中国第一汽车股份有限公司研发总院长春130013

以适时分动器用湿式离合器为研究对象,搭建离合器传递扭矩热力学模型,估算离合器传递扭矩及对流换热因数,提取影响钢片温度的关键因素,并对关键因素开发钢片温度动态测试物理模型。基于实测结果,分析不同钢片轴向温度场分布规律,优化离... 详细信息

以适时分动器用湿式离合器为研究对象,搭建离合器传递扭矩热力学模型,估算离合器传递扭矩及对流换热因数,提取影响钢片温度的关键因素,并对关键因素开发钢片温度动态测试物理模型。基于实测结果,分析不同钢片轴向温度场分布规律,优化离合器冷却油道,实现了不同钢片最大温度差降幅达74.6%,有效提升离合器传递扭矩能力,同时进行不同油温、扭矩、转速差下的离合器温度模型深度标定,实现分动器实车精准传递扭矩能力的同时,仍具备可靠的热保护功能。

关键词：湿式单离合器钢片温度温度模型动态测试

维普期刊数据库博看期刊

科技成果转化“技术自由岛”构筑的理念与路径

在线全文

学校读者我要写书评

暂无评论

科学学研究 2024年第1期42卷 76-84页

作者：刘慧张晓东钱旭红辛忠彭德雷范体军华东理工大学法学院上海200237 华东师范大学上海200062 华东理工大学化工学院上海200237 华东理工大学商学院上海200237

赋予科研人员职务科技成果所有权或长期使用权,对破除阻碍技术要素自由流动的体制机制障碍具有重要作用。但赋权后科研人员职务科技成果转化仍受到决策不自由、转化过程不自由等一系列因素的束缚。为了促进以科研人员为中心的科技成果转... 详细信息

赋予科研人员职务科技成果所有权或长期使用权,对破除阻碍技术要素自由流动的体制机制障碍具有重要作用。但赋权后科研人员职务科技成果转化仍受到决策不自由、转化过程不自由等一系列因素的束缚。为了促进以科研人员为中心的科技成果转化,让技术在一定的时空范围内自由流通,本研究提出构筑科技成果转化“技术自由岛”的理念。在“技术自由岛”内赋予科研人员技术的完全所有权,最大限度地突破国资监管、现有收益机制等的束缚。通过完善现行科技成果转化中的立法与制度,发展出系统性的“技术自由岛”职务科技成果转化保障机制,从而实现职务科技成果转化的促进与治理。

关键词：技术自由岛职务科技成果所有权决策权利益分配

A Nomogram Model for Prediction of Mortality Risk of Patients with Dangerous Upper Gastrointestinal Bleeding:A Two-center Retrospective Study

在线全文

学校读者我要写书评

暂无评论

当代医学科学(英文) 2023年第4期43卷 723-732页

作者： Zhou liu Liang zhanG Guang LI Wen-hui BAI Pei-xue WANG Gui-jun JIANG Ji-xiang zhanG Li-ying zhan Li CHENG Wei-guo DONG Department of Intensive Care Unit Renmin Hospital of Wuhan UniversityWuhan 430060China Department of Radiology Renmin Hospital of Wuhan UniversityWuhan 430060China Department of Hepatobiliary Surgery Renmin Hospital of Wuhan UniversityEastern CampusWuhan 430200China Department of Gastroenterology The First People's Hospital of JingzhouJingzhou 434000China Department of Gastroenterology Renmin Hospital of Wuhan UniversityWuhan 430060China Department of Intensive Care Unit Renmin Hospital of Wuhan UniversityEastern CampusWuhan 430200China

Objective:This study aimed to establish a nomogram model to predict the mortality risk of patients with dangerous upper gastrointestinal bleeding(DUGIB),and identify high-risk patients who require emergent ***:From January 2020 to April 2022,the clinical data of 256 DUGIB patients who received treatments in the intensive care unit(ICU)were retrospectively collected from Renmin Hospital of Wuhan University(n=179)and the Eastern Campus of Renmin Hospital of Wuhan University(n=77).The 179 patients were treated as the training cohort,and 77 patients as the validation *** regression analysis was used to calculate the independent risk factors,and R packages were used to construct the nomogram *** prediction accuracy and identification ability were evaluated by the receiver operating characteristic(ROC)curve,C index and calibration *** nomogram model was also simultaneously externally *** curve analysis(DCA)was then used to demonstrate the clinical value of the ***:Logistic regression analysis showed that hematemesis,urea nitrogen level,emergency endoscopy,AIMS65,Glasgow Blatchford score and Rockall score were all independent risk factors for *** ROC curve analysis indicated the area under curve(AUC)of the training cohort was 0.980(95%CI:0.962-0.997),while the AUC of the validation cohort was 0.790(95%CI:0.685-0.895).The calibration curves were tested for Hosmer-Lemeshow goodness of fit for both training and validation cohorts(P=0.778,P=0.516).Conclusion:The developed nomogram is an effective tool for risk stratification,early identification and intervention for DUGIB patients.

关键词： acute upper gastrointestinal bleeding mortality risk factors nomogram model prognosis

Influence of vegetation type and topographic position on volumetric soil water content dynamics and similarity among surface and deep soil layers

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

International Soil and Water Conservation Research 2023年第1期11卷 183-196页

作者： Muxing liu Qiuyue Wang jun Yi Hailin zhang Ji liu Wei Hu Key Laboratory for Geographical Process Analysis&Simulation Hubei ProvinceWuhan430079China College of Urban and Environmental Sciences Central China Normal UniversityWuhan430079China The New Zealand Institute for Plant and Food Research Limited Private Bag 4704Christchurch8140New Zealand

Clarifying the mechanisms governing volumetric soil water content(VSWC)dynamics in soil profiles is essential,as it can help to elucidate soil water transport processes and improve the prediction accuracy of soil hydrological *** Spearman's rank correlation and wavelet coherence analysis methods,similarity in soil profile VSWC dynamics and factors governing VSWC soil profile dynamics in upslopes and downslopes under three vegetation types(evergreen forest[EG],secondary deciduous forest mixed with shrubs[SDFS],and deforested pasture[DP])at different time scales(hourly,daily,weekly,and monthly)and in different seasons were *** results revealed significant similarity in the VSWC of different soil depths(Pweekly(42.8%)>daily(21.8%).The effects of soil properties(e.g.,texture,saturated hydraulic conductivity),rainfall,and potential evapotranspiration(ET_(p))on VSWC similarity were related to the time scale and season in which VSWC monitoring took *** properties had apparent effects on VSWC similarity at longer time scales(i.e.,monthly),with a high *** contrast,the effects of rainfall and ET_(p) on VSWC similarity were concentrated at weekly and daily scales,with a relatively low *** and ET_(p) dominated VSWC dynamics in the summer and fall,*** results imply the use of measured VSWC at one soil depth to predict the VSWC at other soil depths was a reliable *** the in-fluence of time scale effects and seasonal variations on prediction accuracy of VSWC should be considered.

关键词： Volumetric soil water content Wavelet analysis Significant coherence area Time scale Vegetation type Slope postion

Solid phase extraction of methomyl and thiodicarb from environmental water with an activated carbon cartridge and their determination by HPLC

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

Journal of Environmental Sciences 2000年第1期12卷 100-104页

作者： Chen, Yan-jun Lu, Ying-Hua liu, jun Chen, Ya-Min Department of Chemistry Jining Medical College Shandong Jining 272113 China

A solid phase extraction procedure of methomyl and thiodicarb from environmental water was presented. This method utilizes a 40—60 mesh activated carbon cartridge and high performance liquid chromatography (HPLC). The 40—60 mesh activated carbon works faster and yield higher adsorption efficiency. Detection limits of methomyl and thiodicarb in environmental water are 0 1 μg/L and 0 2 μg/L, respectively. Average recoveries of fortified methomyl and thiodicarb in water are in the range of 90 7%—98 8% and 88 9%—103 6%, respectively. The relative standard deviations are lower than 7%. This method is simple, rapid, accurate and precise.

关键词： HPLC solid phase extraction activated carbon methomyl thiodicarb CLC number: X592 Document code: A

Large Deformation Beam/Cable Element with Implicit Kinematic Model

在线全文

学校读者我要写书评

暂无评论

Journal of Harbin Institute of Technology(New Series) 2013年第6期20卷 1-8页

作者： Shi-Yi liu Yao-jun Ge State Key Laboratory of Disaster Reduction in Civil Engineering Tongji University

This paper proposes a 3D 2-node element for beams and cables. Main improvements of the element are two new interpolation functions for beam axis and cross-sectional rotation. New interpolation functions employ implicit functions to simulate large deformations. In the translational interpolation function, two parameters which affect lateral deflection geometry are defined implicitly through nonlinear equations. The proposed translational interpolation function is shown to be more accurate than Hermitian function at large deformations. In the rotational interpolation function, twist rate is defined implicitly through a torsional continuity equation. Cross-sectional rotation which is strictly consistent to beam axis is obtained through separate bending rotation interpolation and torsional rotation interpolation. The element model fully accounts for geometric nonlinearities and coupling effects,and thus,can simulate cables with zero bending stiffness. Stiffness matrix and load vector have been derived using symbolic computation. Source code has been generated *** examples show that the proposed element has significantly higher accuracy than conventional 2-node beam elements under the same meshes for geometrically nonlinear problems.

关键词： large deformation analysis 2-node interpolation functions consistent rotational interpolation implicit functions symbolic computationCLC number:TU323.3 Document code:AArticle ID:1005-9113(2013)06-0001-08

CO on Cu{001}c(2 × 2)-Pd Studied by High Resolution Electron Energy Loss Spectroscopy

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 1991年第8期8卷 404-407页

作者： YAO jun liu Guoliang liu Fengqin LÜSihua WU Sicheng Synchrotron Radiation Laboratory Institute of High Energy PhysicsAcademia SinicaBeijing 100039 Department of Physics Yantai UniversityYan tai 264005 Department of Physics Peking UniversityBeijing 100871 Laboratory for Surface Physics Academia SinicaBeijing 100080

The adsorption of CO on Cu{001}c(2 × 2)-Pd surface has been studies by electron energy loss *** 240 K,CO molecules are Linearly bonded on the top of Pd atoms *** 135 K,CO adsorbed both on the top position of Pd and Cu atoms which occupied preferably on Pd top *** possible dissociative adsorption phase of CO,which exists at room temperature,has been discussed also.

关键词： spectroscopy adsorption adsorbed

Time Series and Spatial Epidemiological Analysis of the Prevalence of Iodine Deficiency Disorders in China

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

Biomedical and Environmental Sciences 2022年第8期35卷 735-745页

作者： FAN Li jun GAO Yun Yan MENG Fan Gang liu Chang liu Lan Chun DU Yang liu Li Xiang LI Ming SU Xiao Hui liu Shou jun liu Peng Institute of lodine DeficiencyDisorders Center for Endemic Disease ControlChinese Center forDisease Control and PreventionHarbin Medical UniversityHarbin 150081HeilongjiangChina National Health Commission&Education Bureau of Heilongjiang Province Key laboratory of Etiology and EpidemiologyHarbin Medical UniversityHarbin 150081HeilongjiangChina

Objective To recognize the spatial and temporal characteristics of iodine deficiency disorders(IDD),China national IDD surveillance data for the years of 1995–2018 were *** Time series analysis was used to describe and predict the IDD related indicators,and spatial analysis was used to analyze the spatial distribution of salt iodine *** In China,the median urinary iodine concentration increased in 1995–1997,then decreased to adequate levels,and are expected to remain appropriate in 2019–*** goiter rate continually decreased and is expected to be maintained at a low *** 2002,the coverage rates of iodized salt and the consumption rates of qualified iodized salt(the percentage of qualified iodized salt in all tested salt) increased and began to decline in 2012;they are expected to continue to *** epidemiological analysis indicated a positive spatial correlation in 2016–2018 and revealed feature regarding the spatial distribution of salt related indicators in coastal areas and areas near iodine-excess *** Iodine nutrition in China showed gradual ***,a recent decline has been observed in some areas following changes in the iodized salt supply in *** the future,more regulations regarding salt management should be issued to strengthen IDD control and prevention measures,and avoid the recurrence of IDD.

关键词： Salt iodine lodine deficiency disorders Time series analysis Space epidemiology Reform for the salt industry system