检索结果-南通市图书馆

Inheritance of Boron Efficiency in Oilseed Rape

在线全文

学校读者我要写书评

暂无评论

Pedosphere 2009年第3期19卷 403-408页

作者： SHI Lei WANG Yun-Hua NIAN Fu-Zhao LU Jian-Wei MENG Jin-Ling xu Fang-sen National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research （Wuhan） Huazhong Agriculture University Wuhan 430070 （China） Microelement Research Centre College of Resources and Environment Huazhong Agriculture University Wuhan 430070 （China）

Field experiments were conducted to study the inheritance of boron efficiency in oilseed rape (Brassica napus L.) by evaluating the boron (B) efficiency coefficient (BEC, the ratio of the seed yield at below the critical boron level to that at the boron-sufficient level) with 657 F2:3 lines of a population derived from a cross between a B-efficient cultivar, Qingyou 10, and a B-inefficient cultivar, Bakow. Qingyou 10 had high BEC as well as high seed yield at low available soil B. On the contrary, Bakow produced low seed yield at low B status. Boron deficiency decreased the seed yield of the F2:3 lines to different extents and the distribution of BEC of the population showed a bimodal pattern. When the 657 F2:3 lines were grouped into B-efficient lines and B-inefficient lines according to their BEC, the ratio of B-efficient lines to B-inefficient lines fitted the expected ratio (3:1), indicating that one major gene controlled the B-efficiency trait. 127 F2:3 lines selected from the population at random, with distribution of BEC similar to that of the overall population, were used to identify the target region for fine mapping of the boron efficiency gene.

关键词： boron efficiency boron level Brassica napus L. inheritance seed yield

Liver transplantation versus liver resection for hepatocellular carcinoma: a meta-analysis

在线全文

学校读者我要写书评

暂无评论

Hepatobiliary & Pancreatic Diseases International 2014年第3期13卷 234-241页

作者： Xin-sen xu Chang Liu Kai Qu Yan-Zhou Song Peng Zhang Yue-Lang Zhang Department of Hepatobiliary Surgery First Affiliated Hospital School of Medicine Xi'an Jiaotong University Department of Radiology First Affiliated Hospital School of Medicine Xi'an Jiaotong University

BACKGROUND: Liver transplantation(LT) and liver resection(LR) are currently considered the standard treatment of patients with hepatocellular carcinoma(HCC). However, the outcomes of LT and LR are still *** SOURCES: MEDLINE, EMBASE, and Cochrane Library were searched for relevant studies. Surgical safety indices such as treatment-related morbidity and mortality, and efficacy indices such as overall and tumor-free survival outcomes were evaluated. Weighted mean differences and odds ratios(ORs)were calculated using a random-effects ***: Seventeen studies were included in this *** achieved significantly higher rates of surgeryrelated morbidity(OR=1.47; 95% CI: 1.02-2.13) and mortality(OR=2.12; 95% CI: 1.11-4.05). Likewise, the 1-year survival rate was lower in LT(OR=0.86; 95% CI: 0.61-1.20). However, the 3-and 5-year survival rates were significantly higher in LT than in LR and the ORs were 1.12(95% CI: 0.96-1.30) in 3 years and1.84(95% CI: 1.49-2.28) in 5 years. Furthermore, the tumorfree survival rate in LT was significantly higher than that in LR in 1, 3, 5 years after surgery, with the ORs of 1.72(95% CI:1.24-2.41), 3.75(95% CI: 2.94-4.78) and 5.64(95% CI: 4.35-7.31),***: One-year morbidity and mortality are higher in LT than in LR for patients with HCC. However, long-term survival and tumor-free survival rates are higher in patients treated with LT than those treated with LR.

关键词： hepatocellular carcinoma liver transplantation hepatectomy

许森《尔雅郑玄注稽存》述评——兼《尔雅诂林叙录·郑玄‘尔雅注’(许森辑本)提要》辨析

在线全文

学校读者我要写书评

暂无评论

图书馆杂志 2009年第4期28卷 66-70页

作者：彭喜双复旦大学中文系上海200433

详细考查了许森所著《尔雅郑玄注稽存》,发现许森所稽混淆了郑玄本《尔雅》和《尔雅》郑玄注的概念,且多为整合前人之研究成果,整合不当,成绩并不显著。《尔雅诂林叙录》为许书所撰提要,未对此书认真考查,褒扬有加,鉴于《尔雅诂林叙录... 详细信息

详细考查了许森所著《尔雅郑玄注稽存》,发现许森所稽混淆了郑玄本《尔雅》和《尔雅》郑玄注的概念,且多为整合前人之研究成果,整合不当,成绩并不显著。《尔雅诂林叙录》为许书所撰提要,未对此书认真考查,褒扬有加,鉴于《尔雅诂林叙录》在学术界的重要影响,文中于其不妥之处,详为辨析。其他言及许书之著作,或认识不够,或沿袭《尔雅诂林叙录》之误,一并指出。

关键词：许森《尔雅郑玄注稽存》《尔雅》郑玄《尔雅诂林叙录》

A Clustering Analysis Method for Massive Music Data

在线全文

学校读者我要写书评

暂无评论

Modern Electronic Technology 2021年第1期5卷 24-31页

作者： Yanping xu sen xu School of Information Engineering Yancheng Institute of TechnologyYanchengJiangSu224051China

Clustering analysis plays a very important role in the field of data mining,image segmentation and pattern *** method of cluster analysis is introduced to analyze NetEYun music *** addition,different types of music data are clustered to find the commonness among the same kind of music.A music data-oriented clustering analysis method is proposed:Firstly,the audio beat period is calculated by reading the audio file data,and the emotional features of the audio are extracted;Secondly,the audio beat period is calculated by Fourier ***,a clustering algorithm is designed to obtain the clustering results of music data.

关键词： Spectral clustering algorithm K-mean Music similarity Audio period extraction

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

Science China(Information Sciences) 2018年第3期61卷 131-147页

作者： sen xu Xiangjun LU Kaiyu ZHANG Yang LI Lei WANG Weijia WANG Haihua GU Zheng GUO Junrong LIU Dawu GU Department of Computer Science and Engineering Shanghai Jiao Tong University College of Computer Science and Technology Nanjing University of Aeronautics and Astronautics

A template attack, the most powerful side-channel attack methods, usually first builds the leakage profiles from a controlled profiling device, and then uses these profiles to recover the secret of the target device. It is based on the fact that the profiling device shares similar leakage characteristics with the target device. In this study, we focus on the similar operations in a single device and propose a new variant of the template attack, called the similar operation template attack(SOTA). SOTA builds the models on public variables(e.g., input/output) and recovers the values of the secret variables that leak similar to the public variables. SOTA’s advantage is that it can avoid the requirement of an additional profiling device. In this study, the proposed SOTA method is applied to a straightforward RSA-CRT implementation. Because the leakage is(almost) the same in similar operations, we reduce the security of RSA-CRT to a hidden multiplier problem(HMP) over GF(q), which can be solved byte-wise using our proposed heuristic algorithm. The effectiveness of our proposed method is verified as an entire prime recovery procedure in a practical leakage scenario.

关键词： side channel attack template attack RSA-CRT hidden number problem prime recovery

Symptomatic multinodular splenic hamartoma preoperatively suspected as metastatic tumor:A case report

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2014年第30期20卷 10637-10641页

作者： Rui-Tao Wang Xin-sen xu Hui-Lian Hou Kai Qu Ji-Gang Bai Department of Hepatobiliary Surgery the First Affiliated Hospital of Medical CollegeXi’an Jiaotong University Department of Pathology the First Affiliated Hospital of Medical CollegeXi’an Jiaotong University

Splenic hamartoma(SH)is a rare benign tumor usually detected accidentally,which is composed of an aberrant mixture of normal splenic ***,we report a case of 54-year-old man who presented with symptomatic multinodular SH and was admitted initially for thrombocytopenia and *** examination revealed that the patients had an anemic appearance and palpable spleen,extending 10 cm below the costal *** ultrasound and computed tomography(CT)indicated splenomegaly with multinodular *** enhanced CT scanning,during the arterial phase,the lesions demonstrated inhomogeneous enhancement,and in the portal phase the lesions were more hyperdense than the splenic *** images were highly suggestive of a metastatic *** was performed 1 wk *** tumor was eventually diagnosed as SH according to the morphological features and immunohistochemical detection,by which CD34 was positive in lining cells and some spindle cells,vimentin was positive in the tumor,factor-Ⅷ-related antigen was positive multifocally in lining cells,and smooth muscle actin was positive in some spindle *** and anemia were cured after splenectomy.

关键词： Splenic Hamartoma Splenectomy Diagnosis Symptoms

Least squares weighted twin support vector machines with local information

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 Central South University 2015年第7期22卷 2638-2645页

作者：花小朋徐森李先锋 School of Information Engineering Yancheng Institute of Technology School of Computer Science and Technology China University of Mining and Technology

A least squares version of the recently proposed weighted twin support vector machine with local information(WLTSVM) for binary classification is formulated. This formulation leads to an extremely simple and fast algorithm, called least squares weighted twin support vector machine with local information(LSWLTSVM), for generating binary classifiers based on two non-parallel hyperplanes. Two modified primal problems of WLTSVM are attempted to solve, instead of two dual problems usually solved. The solution of the two modified problems reduces to solving just two systems of linear equations as opposed to solving two quadratic programming problems along with two systems of linear equations in WLTSVM. Moreover, two extra modifications were proposed in LSWLTSVM to improve the generalization capability. One is that a hot kernel function, not the simple-minded definition in WLTSVM, is used to define the weight matrix of adjacency graph, which ensures that the underlying similarity information between any pair of data points in the same class can be fully reflected. The other is that the weight for each point in the contrary class is considered in constructing equality constraints, which makes LSWLTSVM less sensitive to noise points than WLTSVM. Experimental results indicate that LSWLTSVM has comparable classification accuracy to that of WLTSVM but with remarkably less computational time.

关键词： least squares similarity information hot kernel function noise points

To Construct High Level Secure Communication System： CTMI Is Not Enough

在线全文

学校读者我要写书评

暂无评论

China Communications 2018年第11期15卷 122-137页

作者： sen xu Xiangjun Lu Aidong Chen Haifeng Zhang Haihua Gu Dawu Gu Kaiyu Zhang Zheng Guo Junrong Liu Department of Computer Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China Department of Software Engineering Beijing Union University Beijing 100 101 China Wanda Internet Technology Group Shanghai 200127 China Beijing Smart-Chip Microelectronics Technology Co. Ltd. Beijing China

Public key cryptographic （PKC） algorithms, such as the RSA, elliptic curve digital signature algorithm （ECDSA） etc., are widely used in the secure communication sys- tems, such as OpenSSL, and a variety of in- formation security systems. If designer do not securely implement them, the secret key will be easily extracted by side-channel attacks （SCAs） or combinational SCA thus mitigat- ing the security of the entire communication system. Previous countermeasures of PKC im- plementations focused on the core part of the algorithms and ignored the modular inversion which is widely used in various PKC schemes. Many researchers believe that instead of straightforward implementation, constant time modular inversion （CTMI） is enough to resist the attack of simple power analysis combined with lattice analysis. However, we find that the CTMI security can be reduced to a hidden t-bit multiplier problem. Based on this feature, we firstly obtain Hamming weight of interme- diate data through side-channel leakage. Then, we propose a heuristic algorithm to solve the problem by revealing the secret （partial and full） base of CTMI. Comparing previous nec-essary input message for masking filtering, our procedure need not any information about the secret base of the inversion. To our knowl- edge, this is the first time for evaluating the practical security of CTM! and experimental results show the fact that CTMI is not enough for high-level secure communication systems.

关键词： information security side channelanalysis elliptic curve digital signature algo-rithm constant time modular inversion ham-ming weight leakage

Wake Effects on A Hybrid Semi-Submersible Floating Wind Farm with Multiple Hub Heights

在线全文

学校读者我要写书评

暂无评论

China Ocean Engineering 2023年第1期37卷 101-114页

作者： xu Xiao-sen GU Jia-yang LING Hong-jie YANG Pu-yi WANG Shuai-shuai XING Yi-han Oleg GAIDAI ZHANG Zhong-yu Marine Equipment and Technology Institute Jiangsu University of Science and TechnologyZhenjiang 212100China Department of Mechanical and Civil Engineering Florida Institute of TechnologyMelbourne 32901United States Department of Marine Technology Norwegian University of Science and TechnologyTrondheim 7491Norway Department of Mechanical and Structural Engineering and Materials Science University of StavangerStavanger 4021Norway College of Engineering Science and Technology Shanghai Ocean EngineeringShanghai 201306China

Wind farms generally consist of a single turbine installed with the same hub height. As the scale of turbines increases,wake interference between turbines becomes increasingly significant, especially for floating wind turbines(FWT).Some researchers find that wind farms with multiple hub heights could increase the annual energy production(AEP),while previous studies also indicate that wake meandering could increase fatigue loading. This study investigates the wake interaction within a hybrid floating wind farm with multiple hub heights. In this study, *** is employed to simulate a hybrid wind farm which consists of four semi-submersible FWTs(5MW and 15MW) with two different hub heights. Three typical wind speeds(below-rated, rated, and over-rated) are considered in this paper to investigate the wake meandering effects on the dynamics of two FWTs. Damage equivalent loads(DEL) of the turbine critical components are computed and analyzed for several arrangements determined by the different spacing of the four turbines. The result shows that the dynamic wake meandering significantly affects downstream turbines’ global loadings and load effects. Differences in DEL show that blade-root flapwise bending moments and mooring fairlead tensions are sensitive to the spacing of the turbines.

关键词： hybrid floating wind farm wake meandering multiple hub heights floating wind turbine FAST.Farm fatigue