检索结果-南通市图书馆

Prediction and stratification for the surgical adverse events after minimally invasive esophagectomy:A two-center retrospective study

引用

World Journal of Gastroenterology 2025年第3期31卷 50-61页

作者： Qi-Hong Zhong jiang-Shan huang Fei-Long Guo Jing-Yu Wu Mao-Xiu Yuan Jia-Fu Zhu Wen-Wei Lin Sui Chen Zhen-Yang Zhang jiang-Bo Lin Department of Thoracic Surgery Fujian Medical University Union HospitalFuzhou 350001Fujian ProvinceChina The Graduate School Fujian Medical UniversityFuzhou 350001Fujian ProvinceChina Department of Thoracic Surgery Affiliated Hospital of Jinggangshan UniversityJi’an 343000Jiangxi ProvinceChina

BACKGROUND Minimally invasive esophagectomy(MIE)is a widely accepted treatment for esophageal cancer,yet it is associated with a significant risk of surgical adverse events(SAEs),which can compromise patient recovery and long-term *** preoperative identification of high-risk patients is critical for improving *** To establish and validate a risk prediction and stratification model for the risk of SAEs in patients with *** This retrospective study included 747 patients who underwent MIE at two centers from January 2019 to February *** were separated into a train set(n=549)and a validation set(n=198).After screening by least absolute shrinkage and selection operator regression,multivariate logistic regression analyzed clinical and intraoperative variables to identify independent risk factors for SAEs.A risk stratification model was constructed and validated to predict the probability of *** SAEs occurred in 10.2%of patients in train set and 13.6%in the validation *** with SAE had significantly higher complication rate and a longer hospital stay after *** key independent risk factors identified included chronic obstructive pulmonary disease,a history of alcohol consumption,low forced expiratory volume in the first second,and low albumin *** stratification model has excellent prediction accuracy,with an area under the curve of 0.889 for the training set and an area under the curve of 0.793 for the validation *** The developed risk stratification model effectively predicts the risk of SAEs in patients undergoing MIE,facilitating targeted preoperative interventions and improving perioperative management.

关键词： Surgical adverse events Minimally invasive esophagectomy Esophageal cancer Stratification model Perioperative management

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

锯齿形氮化铝纳米带负阻器件电子输运性质研究

引用

原子与分子物理学报 2025年第2期42卷 85-90页

作者：黄绛雪黄启俊何进王豪常胜武汉大学物理科学与技术学院武汉430072

低维纳米带材料因为其结构的特异性而呈现出新奇的物理性质.修饰纳米带的边缘能够调制其电子性质.本文运用基于密度泛函理论(DFT)的第一性原理计算方法,探究了锯齿形氮化铝纳米带(ZAlNNR)单边氟化、单边氯化以及单边氢化的电子结构和输... 详细信息

低维纳米带材料因为其结构的特异性而呈现出新奇的物理性质.修饰纳米带的边缘能够调制其电子性质.本文运用基于密度泛函理论(DFT)的第一性原理计算方法,探究了锯齿形氮化铝纳米带(ZAlNNR)单边氟化、单边氯化以及单边氢化的电子结构和输运特性.研究表明:锯齿型氮化铝纳米带可以通过以上手段实现能带结构的半导体-金属转换.计算电子输运特性,我们发现三种边缘修饰的器件均呈现出负微分电阻效应,其中AlN-F器件有最大峰谷电流比(PVCR),达到了1.78×10^(7),是硅烯纳米器件以及黑磷纳米器件的10^(6)倍.值得一提的是,相比于H-AlN-Cove纳米器件,AlN-F器件能够在更小的偏压范围内实现高PVCR.该结果为锯齿形氮化铝纳米带在低功耗纳米器件中的应用提供了广泛的前景.

关键词：锯齿形氮化铝纳米带电子输运负微分电阻效应第一性原理

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

Effects of Self-gravity on Mass-loss of the Post-impact Super-Earths

引用

Research in Astronomy and Astrophysics 2022年第4期22卷 36-41页

作者： jiang huang Wei Zhong Cong Yu School of Physics and Astronomy Sun Yat-Sen UniversityZhuhai 519082China CSST Science Center for the Guangdong-Hong Kong-Macao Greater Bay Area Zhuhai 519082China State Key Laboratory of Lunar and Planetary Sciences Macao University of Science and TechnologyMacaoChina

Kepler’s observations show most of the exoplanets are *** formation of a super-Earth is generally related to the atmospheric mass loss that is crucial in the planetary structure and *** shock driven by the giant impact will heat the planet,resulting in the atmosphere *** focus on whether self-gravity changes the efficiency of mass *** self-gravity,if the impactor mass is comparable to the envelope mass,there is a significant *** radiative-convective boundary will shift inward by *** the temperature and envelope mass increase,the situation becomes more prominent,resulting in a heavier ***,the impactor mass will increase to motivate the significant mass loss,as the self-gravity is *** the increase of envelope mass,the self-gravity is particularly important.

关键词： planets and satellites:atmospheres planets and satellites:physical evolution methods:numerical

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

Modified Frequency Scaling Algorithm for FMCW SAR Data Processing

引用

Chinese Journal of Aeronautics 2007年第4期20卷 339-345页

作者： jiang Zhihong huang Fukan Wan Jianwei Cheng Zhu College of Electronic Science and Engineering National University of Defense Technology Changsha 410073 China

This paper presents a modified frequency scaling algorithm for frequency modulated continuous wave synthetic aperture radar （FMCW SAR） data processing. The relative motion between radar and target in FMCW SAR during reception and between transmission and reception will introduce serious dilation in the received signal. The dilation can cause serious distortions in the reconstructed images using conventional signal processing methods. The received signal is derived and the received signal in range-Doppler domain is given. The relation between the phase resulting from antenna motion and the azimuth frequency is analyzed. The modified frequency scaling algorithm is proposed to process the received signal with serious dilation. The algorithm can effectively eliminate the impact of the dilation. The algorithm performances are shown by the simulation results.

关键词： FMCW radar SAR radar imaging frequency scaling algorithm

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

Polaron-pair-dependent equivalent circuit parameters of organic solar cells based on CuPc and C_(60)

引用

Chinese Science Bulletin 2010年第13期55卷 1317-1324页

作者： huang jiang YU JunSheng LIN Hui jiang YaDong State Key Laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic Information University of Electronic Scienceand Technology of China (UESTC) Chengdu 610054 China

We present the current-voltage characteristics of organic solar cells based on single and double heterojunction of copper phthalocyanine (CuPc) and C60 by introducing a constant JP instead of photo-current density Jph to represent the density of polaron-pairs generated from excitons at D/A interface. A diode Dext models polaron-pair dissociation, and a diode Drec stands for loss due to polaron-pair recombination. The photovoltaic response under AM 1.5 solar illumination at an intensity of 100 mW/cm2 is parameterized and modeled using the improved equivalent circuit model developed for inorganic pn-junction solar cells. The instinct mechanisms including dissociation, recombination of polaron-pairs and charge carrier collection process are explained by introducing Jph/JP as the dissociation rate of polaron-pairs and |J|/Jph as charge carrier application efficiency ηCA. Especially, we reveal the optimization mechanism for the fill factor FF and series resistance RS of organic solar cells.

关键词：有机太阳能电池极化子等效电路参数 C60 酞菁铜电流电压特性等效电路模型电流密度

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

An improved and scalable process for 3,8-diazabicyclo[3.2.1]-octane analogues

引用

Chinese Chemical Letters 2011年第5期22卷 523-526页

作者： Long jiang huang Da Wei Teng College of Chemical Engineering Qingdao University of Science & Technology Qingdao 266042 China

An improved and scalable process for substituted 3,8-diazabicyclo[3.2.1]octane was developed.N-Benzyl-2,5-dicarbethoxy-pyrrolidine 2 was reduced to N-benzyl-2.5-dihydroxymethylpyrrolidine 9 and subsequently debenzylated to afford N-Boc-2,5- dihydroxymethylpyrrolidine *** mesylation of the diol 10 and cyclization with benzylamine,a diversity of scaffold,3,8- diazabicyclo[3.2.1]octane analogue 12 was obtained in a total yield of 42%in five steps.

关键词： 3 8-Diazabicyclo[3.2.1]octane:Scaffold Process development

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

Resistance spot welding of Ti_(40)Zr_(25)Ni_3Cu_(12)Be_(20) bulk metallic glass:experiments and finite element modeling

引用

Rare Metals 2017年第2期36卷 123-128页

作者： Gang Wang Yong-jiang huang Deodat Makhanlall Jun Shen School of Mechanical and Automotive Engineering Anhui Polytechnic University School of Materials Science and Engineering Harbin Institute of Technology

The use of resistance spot welding（RSW）technology for joining Ti40Zr25Ni3Cu12Be20 metallic glass was *** microstructure obtained from the welded BMG sample was *** without precipitates was prepared with welding current of 5.0 kA for 2cycles.A fully coupled thermal-electrical-mechanical finite element model（FEM） was developed to complement the experimental *** simulated results agree well with the *** effects of key process parameters such as welding current and welding time on the evolvement and microstructure of the weldment were determined and ***,the critical cooling rate for preserving the amorphous state in the weld fusion zone is determined to be approximately 1×10^3 K·s^-1.

关键词： Metallic glasses Simulations Resistance spot welding Cooling rate

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

The population and decay evolution of a qubit under the time-convolutionless master equation

引用

Chinese Physics B 2012年第1期21卷 222-225页

作者： huang jiang Fang Mao-Fa Liu Xiang Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education and Department of PhysicsHunan Normal UniversityChangsha 410081China

We consider the population and decay of a qubit under the electromagnetic environment. Employing the time- convolutionless master equation, we investigate the Markovian and non-Markovian behaviour of the corresponding perturbation expansion. The Jaynes-Cummings model on resonance is investigated. Some figures clearly show the different evolution behaviours. The reasons are interpreted in the paper.

关键词： Markovian non-Markovian time-convolutionless master 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

Nanoscratching and mechanical behaviors of high-entropy alloys with different phase constituents

引用

Journal of Iron and Steel Research International 2019年第11期26卷 1240-1248页

作者： jiang-li Ning Yun-li Feng Xu-dong Li Qi-bo Deng Yong-jiang huang College of Metallurgy and Energy North China University of Science and TechnologyTangshan 063210HebeiChina Tianjin Key Laboratory of Advanced Functional Porous Materials Institute for New Energy Materials and Low-Carbon TechnologiesSchool of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001HeilongjiangChina

High-entropy alloys(HEAs)exhibit unique microstructural features and properties in nanoscale and atomic scale because of their multi-element alloy *** nanoscratching behaviors of three HEAs with different phase constituents,relative to the microstructure and mechanical properties of the HEAs,were *** typical phase constituents were selected:face-centered cubic(FCC)structure,body-centered cubic(BCC)structure,and a dual-phase structure containing both FCC and BCC *** the fact that the FCC alloy has the highest ductility and strain hardening capability,it exhibited inferior scratch resistance due to the over-softening of *** to the brittle failure mode,the BCC alloy hardly exhibited desirable scratch resistance despite its highest *** contrast,the nanostructured dual-phase alloy exhibited the best scratch resistance because of its good combination of strength and ductility,as well as the ductile failure *** research suggests that the HEA with structure comprising nanoscale hard and soft phases is desirable for nanoscratch resistance,and possesses appropriate hardness for industrial applications.

关键词： High-entropy alloy Nanoscratch Mechanical property Microstructure-Failure mode

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

Folded or nonfolded fluorophores incorporating naphthalene:Their fluorescent quenching driven by charge transfer or co-aggregation in the aqueous-organic binary solvent

引用

Chinese Chemical Letters 2010年第2期21卷 221-224页

作者： Zhou, Qi Zhong Liu, Shi Yong Zhao, Shu Min jiang, huang jiang Taizhou Univ Dept Chem Taizhou 317000 Peoples R China Zhejiang Univ Dept Chem Hangzhou 310027 Peoples R China

Folded or nonfolded fluorophores incorporating naphthalene were synthesized and characterized by steady state fluorescence *** as an excellent quenching reagent quenched the fluorescence of Nel6 or nDs(n = 1-4) driven by charge *** aggregation of nDs,α-CD did not quench the fluorescence of *** lower concentration,the quenching tendency ofα-CD against nDs is 2D>3D>4D,while at higher concentration,the tendency is 2D<3D<4D.α-CD showed the selective recognition on its flu...

关键词： Fluorophore Fluorescent quenching Charge transfer Co-aggregation Selective recognition

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：