检索结果-南通市图书馆

Prostate magnetic resonance imaging and the value of experience:An intrareader variability study

Asian Journal of Urology 2023年第4期10卷 488-493页

作者： Thomas Whish-Wilson Jo-Lynn Tan william cross Lih-Ming Wong Tom Sutherland Department of Surgery St Vincent's Hospital Melbourne41 Victoria PdeFitzroy VICAustralia Department of Surgery The University of MelbourneMelbourne VICAustralia Faculty of Medicine The University of MelbourneMelbourne VICAustralia Medical Imaging Department St Vincent's Hospital Melbourne41 Victoria PdeFitzroy VICAustralia

Objective To measure the intraobserver concordance of an experienced genitourinary radiologist reporting of multiparametric magnetic resonance imaging of the prostate(mpMRIp)scans over *** An experienced genitourinary radiologist re-reported his original 100 consecutive mpMRIp scans using Prostate Imaging-Reporting and Data System version 2(PI-RADS v2)after 5 years of further experience comprising>1000 *** agreement was measured using Cohen's ***,specificity,negative predictive value(NPV),positive predictive value(PPV),and accuracy were calculated,and comparison of sensitivity was performed using McNemar's *** Ninety-six mpMRIp scans were included in our final *** the 96 patients,53(55.2%)patients underwent subsequent biopsy(n=43)or prostatectomy(n=15),with 73 lesions *** agreement(Cohen's kappa 0.55)was seen in the number of lesions identified at initial reporting and on re-reading(81 vs.39 total lesions;and 71 vs.37 number of PI-RADS≥3 lesions).For clinically significant prostate cancer,re-reading demonstrated an increase in specificity(from 43%to 89%)and PPV(from 62%to 87%),but a decrease in sensitivity(from 94%to 72%,p=0.01)and NPV(from 89%to 77%).Conclusion The intraobserver agreement for a novice to experienced radiologist reporting mpMRIp using PI-RADS v2 is *** sensitivity is off-set by improved specificity and PPV,which validate mpMRIp as a gold standard for prebiopsy screening.

关键词： Prostate cancer Magneticresonance imaging Prostate Imaging-Reporting and Data System Intrareader Prostate biopsy

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

应用水文学原理

应用水文学原理

引用

1958年

作者：（美）约翰斯敦（Don Johnstone）（美）克乐斯（william P.cross）吴瑞鋐李昌华译

来源：汇雅图书（南通市图书馆... 评论

在线全文

汇雅图书（南通市图书馆）

学校读者我要写书评

暂无评论

Model-based and Fuzzy Logic Approaches to Condition Monitoring of Operational Wind Turbines

引用

International Journal of Automation and computing 2015年第1期12卷 25-34页

作者： Philip cross Xiandong Ma Engineering Department Lancaster University

It is common for wind turbines to be installed in remote locations on land or offshore, leading to difficulties in routine inspection and maintenance. Further, wind turbines in these locations are often subject to harsh operating conditions. These challenges mean there is a requirement for a high degree of maintenance. The data generated by monitoring systems can be used to obtain models of wind turbines operating under different conditions, and hence predict output signals based on known inputs. A model-based condition monitoring system can be implemented by comparing output data obtained from operational turbines with those predicted by the models, so as to detect changes that could be due to the presence of faults. This paper discusses several techniques for model-based condition monitoring systems: linear models, artificial neural networks, and state dependent parameter "pseudo" transfer *** models are identified using supervisory control and data acquisition(SCADA) data acquired from an operational wind firm. It is found that the multiple-input single-output state dependent parameter method outperforms both multivariate linear and artificial neural network-based approaches. Subsequently, state dependent parameter models are used to develop adaptive thresholds for critical output signals. In order to provide an early warning of a developing fault, it is necessary to interpret the amount by which the threshold is exceeded, together with the period of time over which this occurs. In this regard, a fuzzy logic-based inference system is proposed and demonstrated to be practically feasible.

关键词： Condition monitoring wind turbines artificial neural network state dependent parameter model fuzzy logic

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

Failure of the free energy relation under a non-Markovian heat bath temperature change

引用

Chinese Physics B 2012年第9期21卷 1-6页

作者：曹亮 Michael cross 郑志刚 Department of Physics Beijing Normal University Department of Physics California Institute of Technology

We investigate the free energy relation for a system contacting with a non-Markovian heat bath and find that the validity of the relation sensitively depends on the non-Markovian memory effect, which is especially related go the initial preparation effect. This memory effect drives the statistical distribution of the system out of the initial preparation, even if the system starts from an equilibrium state. This leads to the violation of the free energy relation. A possible way of eliminating this memory effect is proposed.

关键词： free energy relation non-Markovian heat bath initial preparation effect

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

政党初选:定义与类型学

引用

江苏师范大学学报（哲学社会科学版） 2019年第3期45卷 107-113页

作者： [以色列]奥弗·肯尼格 [加]威廉·克罗斯 [加]斯科特·普鲁伊瑟 [以色列]吉迪恩·拉哈特张君(校译) 阿什克伦学术学院政治学系以色列卡尔顿大学政治学系加拿大希伯来大学政治学系以色列中国社会科学院政治学研究所

尽管初选曾经几乎只与美国有关,但用于政党领袖和候选人遴选的类似方式近年来在许多议会民主制国家越来越普遍。党内民主的这一重大扩展,导致了“初选”选举这一术语的日益流行以及更多的使用。然而,尽管这个词普及了,但确定一个清晰定... 详细信息

尽管初选曾经几乎只与美国有关,但用于政党领袖和候选人遴选的类似方式近年来在许多议会民主制国家越来越普遍。党内民主的这一重大扩展,导致了“初选”选举这一术语的日益流行以及更多的使用。然而,尽管这个词普及了,但确定一个清晰定义和明确在这一定义下遴选方式的范围,这项工作却进展甚缓。没有概念上的明晰和通用的定义,我们就缺少了比较工作的必备工具。本文指出了一种参与式遴选方式何以能被归入政党初选。首先探讨与初选有关的概念混乱,并提出一条可以阐明概念的路径;然后提出强调三个主要特征的初选定义,并通过提出包含各种初选类型在内的类型学来作出结论。

关键词：政党初选纯初选混合初选

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

Impacts of a Japan–South Korea power system interconnection on the competitiveness of electric power companies according to power exchange prices

引用

Global Energy Interconnection 2020年第3期3卷 292-302页

作者： Romain Zissler Jeffrey S.cross School of Environment and Society Tokyo Institute of Technology2-12-1 OokayamaMeguro-kuTokyo 152-8550Japan

In many regions,international power system interconnections provide economic,energy-security,environmental,and technical *** contrast,such interconnections remain scarce in Northeast *** 2016,after approving a joint memorandum of understanding between major electric power companies from China,Japan,South Korea,and Russia,related initiatives regained momentum in the ***,the corresponding developments in Japan remain limited,mainly owing to the lack of involvement of Japanese electric power *** study represents a pioneering attempt to provide an economic assessment based on power exchange prices of a power system interconnection between Japan and South Korea regarding the competitiveness of electric power companies in terms of competitive business segments and strategic *** found that although the position of Japanese generators may slightly deteriorate,that of the supply segment would substantially improve,thus suggesting that more opportunities than threats are derived from the *** promising outcome may foster the adoption of an interconnection with South Korea considering the positive economic and business perspectives in ***,realizing the interconnection may improve the energy security and air quality in the region.

关键词： Electricity grid interconnection Japan South Korea Electric power company Power exchange price

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

Numerical Simulation of the Tip Aerodynamics and Acoustics Test

引用

Journal of Thermal Science 2016年第2期25卷 153-160页

作者： F Tejero E P Doerffer O Szulc J L cross The Szwalski Institute of Fluid-Flow Machinery Polish Academy of Sciences. Fiszera 14 80-231 Gdansk Poland NASA Ames Research Center (retired) Moffett Field CA USA

The application of an efficient flow control system on helicopter rotor blades may lead to improved aerodynamic performance. Recently, our invention of Rod Vortex Generators(RVGs) has been analyzed for helicopter rotor blades in hover with success. As a step forward, the study has been extended to forward flight conditions. For this reason, a validation of the numerical modelling for a reference helicopter rotor(without flow control) is needed. The article presents a study of the flow-field of the AH-1G helicopter rotor in low-, medium- and high-speed forward flight. The CFD code FLOWer from DLR has proven to be a suitable tool for the aerodynamic analysis of the two-bladed rotor without any artificial wake modelling. It solves the URANS equations with LEA(Linear Explicit Algebraic stress) k-ω model using the chimera overlapping grids technique. Validation of the numerical model uses comparison with the detailed flight test data gathered by cross J. L. and Watts M. E. during the Tip Aerodynamics and Acoustics Test(TAAT) conducted at NASA in 1981. Satisfactory agreements for all speed regimes and a presence of significant flow separation in high-speed forward flight suggest a possible benefit from the future implementation of RVGs. The numerical results based on the URANS approach are presented not only for a popular, low-speed case commonly used in rotorcraft community for CFD codes validation but preferably for medium- and high-speed test conditions that have not been published to date.

关键词： AH-1G TAAT helicopter rotor forward flight chimera overlapping grid

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

Semiotics Turning cross-Cultural

引用

Language and Semiotic Studies 2015年第3期1卷 1-12页

作者： Semiotics Turning cross-Cultural

Semiotics,mostly as a theory of meaning,has a long history both in China and in the *** there had been little interaction between these two independent traditions before the 20th century,we can fi nd some interesting similarities and differences in their semiotic thoughts that continue to influence how we conceptualize things *** China,for example,is widely seen as being characterized by a Marxist epistemology which was imported from the West,but a close examination shows that this dominant theory of knowledge is as much a product of its own native tradition of ontological realism propounded by Ouyang Jian 17 centuries *** the advent of globalization of semiotics in the 20th century,Chinese and Western scholars are now able to take direct advantage of each other’s theoretical resources which often result in new insights critical to the advancement of human *** examples of such East-West interaction are Peirce’s trichotomy of signs being appropriated for the classification of Chinese characters and Qian Zhongshu’s"sides-andhandles theory of metaphor"serving as a critique of the bewildered and bewildering cognitive science championed by George Lakoff and Mark *** is in this sense that semiotics is becoming increasingly global or cross-cultural on top of its interdisciplinary trademark.

关键词： semiotics cross-cultural studies ontological realism Peircean trichotomy Chinese scripts vehicular diversity and multivalency cognitive theory of metaphor

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

Chemical Synthesis of Copper Nanospheres and Nanocubes and Their Antibacterial Activity Against Escherichia coli and Enterococcus sp.

引用

Acta Metallurgica Sinica(English Letters) 2017年第1期30卷 29-35页

作者： A.Alshareef K.Laird R.B.M.cross Faculty of Technology School of Engineering and Sustainable DevelopmentEmerging Technologies Research CentreDe Montfort UniversityLeicester LE1 9BHUK Faculty of Health and Life Sciences Leicester School of PharmacyDe Montfort UniversityLeicester LE1 9BHUK

The interest in synthesising inorganic nanomaterials for biological applications has increased in recent years, especially for antibacterial purposes. In the present study, spherical and cube-shaped copper nanoparticles were synthesised by a chemical reduction method and their efficacy as anfimicrobial agents against both Gram-negative （Escherichia coli） and Gram-positive （Enterococcus sp.） organisms investigated. The nanoparticles were characterised using ultraviolet/ visible spectroscopy, scanning electron microscopy, energy-dispersive spectroscopy and X-ray diffraction. Copper nanocubes were found to be more antimicrobial when compared with copper nanospheres, and it is postulated that whilst both sets of nanoparticles have similar total surface areas, the different shapes have different active facets and surface energies, which may lead to differing bactericidal behaviour.

关键词： Copper nanoparticles Scanning electron microscopy (SEM) Antibacterial Escherichia coli Enterococcus sp.

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

Factors influencing mercury accumulation in three species of forage fish from Caddo Lake, Texas, USA

引用

Journal of Environmental Sciences 2010年第8期22卷 1158-1163页

作者： Matthew M Chumchal Ray W Drenner David R cross K David Hambright Department of Biology Texas Christian University 2800 S. University Dr Department of Psychology Texas Christian University 2800 S. University Dr Program in Ecology and Evolutionary Biology Biological Station and Department of Zoology 730 Van Vleet Oval University of Oklahoma

Most studies that have examined mercury （Hg） contamination of fish have focused on game species feeding near the top of the food web, while studies that examine forage fish that feed near the base of the food web are rare. We conducted a survey of Hg contamination in three species of forage fish, brook silverside （Labidesthes sicculus）, threadfin shad （Dorosoma petenense） and gizzard shad （Dorosoma cepedianum）, from Caddo Lake, Texas, USA and found species-specific differences in Hg concentrations. We examined total length, age, trophic position （determined using δ15N）, and growth rate of forage fish as factors that could have influenced within-and between-species differences in Hg concentration. Total length and age were the best predictors of within-species differences in Hg concentration. Between-species differences in Hg concentrations were most strongly influenced by trophic position.

关键词： mercury trophic position forage fish

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：