检索结果-南通市图书馆

Older liver grafts from donation after circulatory death are associated with impaired survival and higher incidence of biliary non-anastomotic structure

引用

Hepatobiliary & Pancreatic Diseases International 2023年第6期22卷 577-583页

作者： Tian Shen Shan-Hua Zheng Jun Chen Zhi-Sheng Zhou Meng-Fan Yang Xiang-Yan Liu Jun-Li Chen Shu-Sen Zheng Xiao Xu Department of Hepatobiliary and Pancreatic Surgery Shulan(Hangzhou)HospitalHangzhou 310022China Division of Hepatobiliary Pancreatic Surgery The First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003China Key Laboratory of Integrated Oncology and Intelligent Medicine of Zhejiang Province Department of Hepatobiliary and Pancreatic SurgeryAffiliated Hangzhou First People’s HospitalZhejiang University School of MedicineHangzhou 310006China China Liver Transplant Registry Hangzhou 310003China NHC Key Laboratory of Combined Multi-organ Transplantation Hangzhou 310003China Institute of Organ Transplantation Zhejiang UniversityHangzhou 310003China

Background:Grafts from older donors after circulatory death were associated with inferior outcome in liver transplants in the *** it has seemed to remain controversial in the last decade,as a result of modified clinical protocols,selected recipients,and advanced technology of organ perfusion and *** present study aimed to examine the impact of older donor age on complications and survival of liver transplant using grafts from donation after circulatory death(DCD).Methods:A total of 944 patients who received DCD liver transplantation from 2015 to 2020 were included and divided into two groups:using graft from older donor(aged≥65 years,n=87)and younger donor(age<65 years,n=857).Propensity score matching(PSM)was applied to eliminate selection ***:A progressively increased proportion of liver transplants with grafts from older donors was observed from 1.68%to 15.44%during the study *** well-balanced older donor(n=79)and younger donor(n=79)were 1:1 *** were significantly more episodes of biliary nonanastomotic stricture(NAS)in the older donor group than the younger donor group[15/79(19.0%)vs.6/79(7.6%);P=0.017].The difference did not reach statistical significance regarding early allograft dysfunction(EAD)and primary non-function(PNF).Older livers had a trend toward inferior 1-,2-,3-year graft and overall survival compared with younger livers,but these differences were not statistically significant(63.1%,57.6%,57.6%vs.76.9%,70.2%,67.7%,P=0.112;64.4%,58.6%,58.6%vs.76.9%,72.2%,72.2%,P=0.064).The only risk factor for poor survival was ABO incompatible transplant(P=0.008)in the older donor *** the subgroup of ABO incompatible cases,it demonstrated a significant difference in the rate of NAS between the older donor group and the younger donor group[6/8(75.0%)vs.3/14(21.4%);P=0.014].Conclusions:Transplants with grafts from older donors(aged≥65 years)after circulatory death are more frequently associated with inferior outcome com

关键词： Older donor Liver transplantation Survival Biliary stricture Donation after circulatory death

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Anti-reflection coating at 550 nm fabricated by atomic layer deposition

引用

Chinese Optics Letters 2013年第13期11卷 40-42页

作者：李旸晖沈伟东章岳光郝翔范欢欢刘旭 State Key Laboratory of Modern Optical Instrumentation Zhejiang University Hangzhou 310027 China

Trimethylamine （TMA）, TIC14, and water are applied as the precursors to deposit Al2O3 and TiO2. With different substrate temperatures, the optical properties and surface morphologies of the two oxides TiO2 and SiO2 are studied, respectively. With substrate temperature of 120 ℃, amorphous TiO2 can be obtained, and the surface roughness （RMS） is only 0.928 nm. Applying Al2O3 and TiO2 deposited in 120 ℃ as low and high refractive index materials, anti-reflection （AR） coating at single point （550 nm） is designed. Furthermore, with the calibrated growth rates, this AR coating is fabricated, and its ultimate reflectance for the AR coating at 550 nm is less than 0.2%, which can meet the requirement for most applications.

关键词： 310.1210 Antireflection coatings 310.1860 Deposition and fabrication 310.6860 Thin films, optical properties

来源：

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

Automatic inspection of LED indicators on automobile meters based on a seeded region growing algorithm

引用

Journal of Zhejiang University-Science C(Computers and Electronics) 2010年第3期11卷 199-205页

作者： Hong ZHOU Hai-er XU Pei-qi HE Zhi-bai SONG Chen-ge GENG Department of Instrument Science and Engineering Zhejiang University Hangzhou 310027 China haierxu0109@***

Light emitting diode (LED) indicators used on automobile meters are essential for safe driving and few errors can be tolerated. The current manual inspection approach can achieve only 95% accuracy rate in weeding out errors occurring in the production process. It is imperative to improve the accuracy of the inspection process to better achieve the goal of safe driving. This paper proposes an automatic inspection method for LED indicators for use on automobile meters. Firstly,red-green-blue (RGB) color images of LED indicators are acquired and converted into R,G,and B intensity images. A seeded region growing (SRG) algorithm,which selects seeds automatically based on Otsu's method,is then used to extract the LED indicator regions. Finally,a region matching process based on the seed and three area parameters of each region is applied to inspect the LED in-dicators one by one to locate any errors. Experiments on standard automobile meters showed that the inspection accuracy rate of this method was up to 99.52% and the inspection speed was faster compared with the manual method. Thus,the new method shows good prospects for practical application.

关键词： Automatic inspection Light emitting diode (LED) indicators Automobile meter Seeded region growing (SRG)

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A Novel Electrocatalysis Method for Organic Pollutants Degradation

引用

Chinese Chemical Letters 2001年第10期12卷 929-932页

作者： Zhou, MH Wu, ZC Wang, DH Zhejiang Univ Dept Environm Sci & Engn Hangzhou 310027 Peoples R China

A novel electrocatalysis, ferrous ion catalyzed anodic-cathodic electrocatalysis (FACEC), was developed for organic pollutants degradation, which could promote the degradation by achieving synergetic effects of both anodic oxidation and cathodic indirect oxidation. The degradation rate of model pollutants - phenol by FACEC could increase by nearly 30% comparing with that of anodic electrocatalysis, and the current efficiency could reach 67%.

关键词： electrocatalysis synergetic effect phenol degradation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

STABLE PROGRAMMED MANIFOLD SOLVER FOR VIRTUAL PROTOTYPING MOTION SIMULATION

引用

Chinese Journal of Mechanical Engineering 2006年第1期19卷 76-80页

作者： TAN Jianrong WANG Zheng LIU Zhenyu State Key Laboratory of CAD＆CG Zhejiang University Hangzhou 310027 China

Based on constructing programmed constraint and constraint perturbation equation, a kinematics and dynamics numerical simulation model is established for virtual mechanism, in which the difference scheme guarantee precision in simulation procedure and its mtmerical solutions satisfy programmed manifold stability. A crank-piston mechanism in a car engine, a steering mechanism and a suspension mechanism are simulated in a virtual environment, then comparing the simulation results with those obtained in ADAMS under the same circumstances proved the solver valid.

关键词： Kinematics Dynamics Constraint Differential-algebraic equation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

METABALL-BASED TRANSITION SURFACES

引用

Chinese Journal of Mechanical Engineering 2005年第3期18卷 333-337页

作者： Li Lingfeng Tan Jianrong Chen Yuanpeng State Key Laboratory of CAD＆CG Zhejiang University Hangzhou 310027 China

Metaball-based constraint deformation technique is used to change the definition of r, the straight-line distance from a space point to a constraint center in the original calculation of the potential function. By replacing the parameter of the pararnetrized surface w with the straight-line distance r, a method of building transition surfaces according to cormected boundary curves and skeleton curves is proposed. The method has no restrictions on boundary curves that control the space shapes of transition surfaces or on types of skeleton curves, thus transition surfaces, which reach C^1 continuity and are more abundant in shapes and natural, can be obtained.

关键词： Transition curve surface Metaball Potential function

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Oxoarylation of ynamides with N-aryl hydroxamic acids

引用

Chinese Chemical Letters 2021年第8期32卷 2551-2554页

作者： Changwei Chen Hongyu Zhang Gang Xu Sunliang Cui College of Pharmaceutical Sciences Zhejiang UniversityHangzhou 310027China College of Chemical and Biological Engineering Zhejiang UniversityHangzhou 310058China

Ynamides are electron-rich alkynes with unique reactivities and act as flexible building blocks in organic ***,the investigation for transformation of ynamides with exceptional selectivity and efficiency is attractive and ***,we report an oxoarylation of ynamides with N-aryl hydroxamic *** the presence of catalytic Cu(OTf)_(2),both the terminal and internal ynamides could undergo an addition/[3,3] sigmatropic rearrangement cascade with N-aryl hydroxamic acids to achieve oxoarylation,along with providing selective entry to(ortho-amino)arylacetamides and ***,deuterium-labelling reaction and gram-scale reaction were conducted to probe the mechanism and showcase the scalability.

关键词： Ynamide Hydroxamic acid Oxoarylation Oxindole Rearrangement

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Advances in the treatment of multi-pollutant flue gas in China's building materials industry

引用

Journal of Environmental Sciences 2023年第1期123卷 400-416页

作者： Shangchao Xiong Jianjun Chen Hao Liu Wenzhe Si Yue Peng Xuecheng Wu Huan Liu Junhua Li State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China Faculty of Geosciences and Environmental Engineering Southwest Jiaotong UniversityChengdu 610031China State Key Laboratory of Clean Energy Utilization School of Energy EngineeringZhejiang UniversityHangzhou 310027China

In most of the world’s building material industries,the control of flue gas pollutants mainly focuses on a single ***,given the large capacity and high contribution of China’s building materials industry to global air pollution,the need to develop multipollutant emission reduction technology is ***,China has focused on reducing the emissions of flue gas pollutants in the building materials industry,established many key research and development projects,and gradually implemented more stringent pollutant emission *** project focuses on the most recent advances in flue gas emission control technology in China’s building materials industry,including denitration,dust removal,desulfurization,synergistic multi-pollutant emission reduction,and the construction of pilot research and demonstration projects for pollutant removal in several building material *** this basis,revised pollutant limits in flue gas emitted in China’s building material industry are proposed.

关键词： Building materials industry Multi pollutants Emission control Flue gas Demonstration project

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

2018 special issue on artificial intelligence 2.0：theories and applications

引用

Frontiers of Information Technology & Electronic Engineering 2018年第1期19卷 1-2页

作者： Yun-he PAN Zhejiang University Hangzhou 310027 China Chinese Academy of Engineering Beijing 100088 China

In July 2017,the Chinese government issued a guideline on developing artificial intelligence（AI）,namely,the‘New-Generation Artificial Intelligence Development Plan’,through 2030 to the public,setting a goal of becoming a global innovation center in this field by *** to the development plan,breakthroughs should be made in basic theories of AI in terms of big data intelligence.

关键词： special issue on artificial intelligence 2.0:theories and applications AI net

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Functional delivery vehicle of organic nanoparticles in inorganic crystals

引用

Chinese Chemical Letters 2019年第12期30卷 2351-2354页

作者： Linlin Kong Xinyi Jin Dapeng Hu Leyun Feng Dong Chen Hanying Li Institute of Process Equipment College of Energy EngineeringZhejiang UniversityHangzhou 310027China State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang UniversityHangzhou 310027China MOE Key Laboratory of Macromolecular Synthesis and Functionalization State Key Laboratory of Silicon MaterialsDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027China

Encapsulation of bioactive substances for extended shelf life and controlled,targeted release is critical for their applications in food and drug ***,a new method has been developed to encapsulate bioactive molecules in the crystal composites,showing greatly enhanced stability and unique pHtriggered ***,a model bioactive,is first loaded in shellac nanoparticles via coprecipitation with a high encapsulation efficiency,and then the chlorophyll-loaded nanoparticles are incorporated into calcite crystals grown from a gel media containing the *** the protection of shellac nanoparticles and calcite crystals,chlorophyll shows excellent stability even under *** chlorophyll could only be released by first dissolving the calcite crystals under acidic condition and then dissolving the shellac nanoparticles under alkaline *** unique pHtriggered release mimics the pH change from acidic in the stomach to alkaline in the intestine and is thus well suited for controlled,targeted intestinal *** work suggests that the crystal composites are an ideal delivery vehicle for the functional design of bioactive molecules.

关键词： Nanoparticle Calcite crystal Encapsulation Chlorophyll Dual-pH responses

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：