检索结果-南通市图书馆

When should endovascular gastrointestinal anastomosis transection Glissonean pedicle not be used in hepatectomy?A case report

引用

World Journal of Clinical Cases 2022年第24期10卷 8742-8748页

作者： jian Zhao, Yan-Li dang Department of Hepatobiliary Surgery The Affiliated Hospital of Yunnan UniversityKunming 650000Yunnan ProvinceChina Department of Obstetrics First People's Hospital of Yunnan ProvinceKunming 650000Yunnan ProvinceChina

BACKGROUND The literature on post-hepatectomy bile duct injury(PHBDI)is limited,lacking large sample retrospective studies and high-quality experience ***,we reported a special case of iatrogenic bile duct injury caused by Glissonean pedicle transection with endovascular gastrointestinal anastomosis(endo-GIA)during a right hepatectomy,analyzed the causes of this injury,and summarized the experience with this *** SUMMARY We present the case of a 66-year-old woman with recurrent abdominal pain and cholangitis due to intrahepatic cholangiectasis(Caroli's disease).Preoperative evaluation revealed that the lesion and dilated bile ducts were confined to the right liver,with right hepatic atrophy,left hepatic hypertrophy,and hilar *** problem can be resolved by performing a standard right *** the operation went well,jaundice occurred soon after the *** bile duct injury was considered after magnetic resonance cholangiopancreatography review,and the second operation were performed 10 d *** the second operation,it was found that the endo-GIA had damaged the lateral wall of the hepatic duct and multiple titanium nails remained in the bile duct *** led to severe stenosis of the duct wall,and could not be ***,the injured bile duct was transected,and a hepatic-jejunal-lateral Roux-Y anastomosis was performed at the healthy part of the left hepatic *** this surgery,the patient had a smooth postoperative recovery,and the total bilirubin gradually decreased to *** patient was discharged 41 d after *** anastomotic stenosis was found at the 6 mo of *** Not all cases are suitable for endo-GIA transection of Glissonean pedicle,especially in cases of intrahepatic bile duct *** caused by endo-GIA is very difficult to repair due to extensive ischemia,which requires special attention.

关键词： Endovascular gastrointestinal anastomosis Glissonean pedicle Hepatectomy Bile duct injury Safety Case report

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

Model Order Reduction for Coupled Dynamic Characterization of Torsional Micromirrors

引用

Chinese Journal of Mechanical Engineering 2011年第5期24卷 829-835页

作者： shi jian ZHANG Shuyou Department of Mechanical Engineering Zhejiang University Hangzhou 310027 China

Numerical solutions could not perform rapid system-level simulation of the behavior of micro-electro-mechanical systems（MEMS） and analytic solutions for the describing partial differential equations are only available for simple *** order reduction（MOR） can extract approximate low-order model from the original large scale *** model order reduction algorithm is based on first-order system model,however,most structure mechanical MEMS systems are naturally second-order in *** the purpose of solving the above problem,a direct second-order system model order reduction approach based on Krylov subspace projection for the coupled dynamic study of electrostatic torsional micromirrors is *** block Arnoldi process is applied to create the orthonormal vectors to construct the projection matrix,which enables the extraction of the low order model from the discretized system assembled through finite element *** transfer functions of the reduced order model and the original model are expanded to demonstrate the moment-matching property of the second-order model reduction *** torsion and bending effect are included in the finite element model,and the squeeze film damping effect is considered as *** empirical method considering relative error convergence is adopted to obtain the optimal choice of the order for the reduced model.A comparison research between the full model and the reduced model is carried *** modeling accuracy and computation efficiency of the presented second-order model reduction method are confirmed by the comparison research *** research provides references for MOR of MEMS.

关键词： model order reduction torsional micromirror moment-matching

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

Enhanced Power Choice Barring Scheme For Massive MTCs With Grant-Free NOMA

引用

China Communications 2021年第10期18卷 135-147页

作者： Liang Wu Xiaorui Tang Zaichen Zhang jian dang National Mobile Communications Research Laboratory Southeast UniversityNanjing 210096China Purple Mountain Laboratories Nanjing 211111China

Massive machine-type communication(m MTC)is a typical application scenario of the fifth generation(5G)mobile *** keep the m MTC reliable and minimize the energy consumption of the m MTC devices,this paper proposes an enhanced power choice barring(EPCB)scheme based on the distributed layered grant-free non-orthogonal multiple access(NOMA)framework,where the cell is divided into different layers according to a predetermined power *** proposed EPCB scheme not only combines the grant-free strategy with the sleep mode to reduce the energy consumption,but also designs a power level choosing strategy to increase the access success *** results show that when compared with existing schemes,the proposed EPCB scheme has better performance in the aspects of the access success probability and energy efficiency.

关键词： grant-free massive machine-type communication NOMA power level choosing

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

Fast Single-phase Fault Location Method Based on Community Graph Depth-first Traversal for Distribution Network

引用

CSEE Journal of Power and Energy Systems 2023年第2期9卷 612-622页

作者： jian dang Yunjiang Yan Rong Jia Xiaowei Wang Hui Wei Xi’an Key Laboratory of Intelligent Energy Xi’an University of TechnologyShaanxi 710048China

With the increasing complexity of distribution network structures originating from the high penetration of renewable energy and responsive loads,fast and accurate fault location technology for distribution networks is a prerequisite for rapid isolation of faults and restoration of the power *** this paper,a fault location method based on community graph depth-first traversal is proposed for fast location of single-phase ground faults in distribution ***,this paper defines the fault graph weight of the vertices in the distribution network graph model,which can be used to reflect the topology of the vertices and fault points as well as the fluctuation of the vertices’***,the vertices on the graph model are clustered by using an improved parallel louvain method(IPLM).Finally,the community formed by IPLM is used as the smallest unit for depth-first traversal to achieve fast and accurate location of the fault *** paper develops a distribution network graph model of IEEE 33-bus system on the graph database for *** three other methods are selected for comparison with *** test results show that IPLMDF can achieve fast and accurate fault location when half of the nodes in the distribution network are equipped with *** some of the D-PMUs lose time synchronization,it is still possible to locate the fault section,and at the same time,the locating results can be avoided by falling into local optimal solutions.

关键词： Depth-first traversal fault location graph computation single-phase fault

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

Fault Information Recognition for On-board Equipment of High-speed Railway Based on Multi-neural Network Collaboration

引用

International Journal of Automation and computing 2021年第6期18卷 935-946页

作者： Lu-Jie Zhou jian-Wu dang Zhen-Hai Zhang School of Automation and Electrical Engineering Lanzhou Jiaotong UniversityLanzhou 730070China Gansu Provincial Engineering Research Center for Artificial Intelligence and Graphic&Image Processing Lanzhou 730070China

It is of great significance to guarantee the efficient statistics of high-speed railway on-board equipment fault information,which also improves the efficiency of fault analysis. Considering this background, this paper presents an empirical exploration of named entity recognition(NER) of on-board equipment fault information. Based on the historical fault records of on-board equipment, a fault information recognition model based on multi-neural network collaboration is proposed. First, considering Chinese recorded data characteristics, a method of constructing semantic features and additional features based on character granularity is proposed. Then, the two feature representations are concatenated and passed into the gated convolutional layer to extract the dependencies from multiple different subspaces and adjacent characters in parallel. Next, the local features are transmitted to the bidirectional long short-term memory(BiLSTM) to learn long-term dependency information. On top of BiLSTM, the sequential conditional random field(CRF) is used to jointly decode the optimized tag sequence of the whole sentence. The model is tested and compared with other representative baseline models. The results show that the proposed model not only considers the language characteristics of on-board fault records, but also has obvious advantages on the performance of fault information recognition.

关键词： Train control system Chinese named entity recognition(NER) character feature gating mechanism bidirectional long short-term memory(BiLSTM)

来源：

维普期刊数据库

同方期刊数据库

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

Efficient SIMD optimization for media processors

引用

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第4期9卷 524-530页

作者： jian-peng ZHOU Ce shi Department of Information Science and Electronic Engineering Zhejiang University Hangzhou 310027 China

Single instruction multiple data （SIMD） instructions are often implemented in modem media processors. Although SIMD instructions are useful in multimedia applications, most compilers do not have good support for SIMD instructions. This paper focuses on SIMD instructions generation for media processors. We present an efficient code optimization approach that is integrated into a retargetable C compiler. SIMD instructions are generated by finding and combining the same operations in programs. Experimental results for the UltraSPARC VIS instruction set show that a speedup factor up to 2.639 is obtained.

关键词： Retargetable compiler Single instruction multiple data (SIMD) instruction LCC

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

Fault Classification for On-board Equipment of High-speed Railway Based on Attention Capsule Network

引用

International Journal of Automation and computing 2021年第5期18卷 814-825页

The conventional troubleshooting methods for high-speed railway on-board equipment, with over-reliance on personnel experience, is characterized by one-sidedness and low efficiency. In the process of high-speed train operation, numerous text-based onboard logs are recorded by on-board computers. Machine learning methods can help technicians make a correct judgment of fault types using the on-board log reasonably. Therefore, a fault classification model of on-board equipment based on attention capsule networks is proposed. This paper presents an empirical exploration of the application of a capsule network with dynamic routing in fault classification. A capsule network can encode the internal spatial part-whole relationship between various entities to identify the fault types. As the importance of each word in the on-board log and the dependencies between them have a significant impact on fault classification, an attention mechanism is incorporated into the capsule network to distill important information. Considering the imbalanced distribution of normal data and fault data in the on-board log, the focal loss function is introduced into the model to adjust the imbalanced data. The experiments are conducted on the on-board log of a railway bureau and compared with other baseline models. The experimental results demonstrate that our model outperforms the compared baseline methods, proving the superiority and competitiveness of our model.

关键词： On-board equipment fault classification capsule network attention mechanism focal loss

来源：

维普期刊数据库

同方期刊数据库

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

Semi-Global Leaderless Consensus of Linear Multi-agent Systems with Actuator and Communication Constraints

引用

Journal of Systems Science & Complexity 2020年第4期33卷 882-902页

作者： WANG jian shi Liangren GUAN Xinping Department of Automation and Key Laboratory of System Control and Information Processing of Ministry of EducationShanghai Jiao Tong UniversityShanghai 200240China Shanghai Key Laboratory of Navigation and Location-based Services and Academy of Information Technology and Electrical EngineeringShanghai Jiao Tong UniversityShanghai 200240China

This paper studies the leaderless consensus problems of multi-agent systems with input saturation and intermittent communication over directed networks. Both the state feedback and the output feedback consensus algorithms are developed based on low gain feedback approach. The convergence of the trajectories of all agents can be achieved by these proposed algorithms, if the communication topology has a directed spanning tree, and the intermittent communication period T and time rate ρ are larger than their associated threshold values. Simulation examples are provided to verify the theoretical results.

关键词： agent directed communication

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

Sieve likelihood ratio inference on general parameter space

引用

Science China Mathematics 2005年第1期48卷 67-78页

作者： shi jian SHEN Xiaotong Academy of Mathematics and Systems Science Beijing 100080China School of StatisticsUniversity of MinnesotaMinneapolisMN 55455USA

In this paper,a theory on sieve likelihood ratio inference on general parameterspaces(including infinite dimensional)is *** fairly general regularity conditions,the sieve log-likelihood ratio statistic is proved to be asymptotically X^2 distributed,whichcan be viewed as a generalization of the well-known Wilks' *** an example,asemiparametric partial linear model is investigated.

关键词： likelihood ratio sieves,nonparametric and semiparametric models,wavelets.

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

Entropy majorization, thermal adiabatic theorem, and quantum phase transitions

引用

Frontiers of physics 2012年第2期7卷 244-251页

作者： shi-jian Gu (1) 1. Department of Physics and Institute of Theoretical Physics The Chinese University of Hong Kong Hong Kong China

Let a general quantum many-body system at a low temperature adiabatically cross through the vicinity of the system＇s quantum critical point. We show that the system＇s temperature is signif- icantly suppressed due to both the entropy majorization theorem in quantum information science and the entropy conservation law in reversible adiabatic processes. We take the one-dimensional transverse-field Ising model and the spinless fermion system as concrete examples to show that the inverse temperature might become divergent around the systems＇ critical points. Since the temper- ature is a measurable quantity in experiments, it can be used, via reversible adiabatic processes at low temperatures, to detect quantum phase transitions in the perspectives of quantum information science and quantum statistical mechanics.

关键词： quantum phase transition entropy majorization

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

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：