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Adenoma of the posterior urethra:131 case report

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Asian Journal of Andrology 2001年第1期3卷 67-70页

作者： Zhen-guo MI Xiao-Feng YANG Xue-Zhi LIANG Hong-Yao LIU Shang-Yin LIU Hong ZHANG Dong-Wen WANG chum LIU Department of Urology,The First Affiliated Hospital, Shanxi Medical University, Taiyuan 030001, China Department of Urology The First Affiliated Hospital Shanxi Medical University Taiyuan China

Aim: A case-report on adenoma of the posterior urethra. Methods: In 131 cases of adenoma of the posteriorurethra, aged 17-79 (mean: 36.4) years, a detailed medical history was taken and urinalysis, urethroscopy, and pro-static specific antigen (PSA) immunohistochemical staining were performed. They were then treated with transurethralresection (TUR) or transurethral electric coagulation (TUEC). Results: Hemospennia occurred in 51% of the cas-es, hemamria in 38%, blood overflow from the urethral orifice in 6%, and dysuria in 5%. The position of the tumorwas at or around the vemmontanum. The appearance of the tumor was similar to those of a papilla, a villus, a dactylor polyp, or simply an engorgement. The tumor contained glandular alveoli and adeno-epithelial cells. PSA immuno-histochemistry was positive in the cytoplasm and nucleus of the adeno-epithelial cell. One hundred and tweenty-ninecases were cured after TUR or TUEC, while 2 patients recurred and were operated again. Conclusion: Adenoma ofthe posterior urethra is a common cause of hemospennia and hematuria in young men. Urethroscopic examination andbiopsy are the principal diagnostic measures. TUR or TUEC are believed to be the treatment of choice with a short-termrecurrence rate of around 1.5%. (Asian J Androl 2000; 3: 67-70)

关键词： adenoma posterior urethra hemspermia hematuria

The angiotensin Ⅱ type 1 receptor and receptor-associated proteins

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Cell Research 2001年第3期11卷 165-180页

作者： guo DENG FU, YU LIN SUN, PAVEL HAMET, TADASHI INAGAMI Research Centre, Hotel-Dieu of chum and Department of Medicine, University of Montreal, Montreal, Quebec, Canada H2W 1T8 Department of Biochemistry, Vanderbilt University, School of Medicine, Nashville Hotel-Dieu of chum and Department of Medicine Research Centre University of Montreal Montreal Canada Department of Biochemistry Vanderbilt University School of Medicine Nashville USA

The mechanisms of regulation, activation and signal transduction of the angiotensin II (Ang II) type 1 (AT1) receptor have been studied extensively in the decade after its cloning. The AT1 receptor is a major component of the renin-angiotensin system (RAS). It mediates the classical biological actions of Ang II. Among the structures required for regulation and activation of the receptor, its carboxyl- terminal region plays crucial roles in receptor internalization, desensitization and phosphorylation. The mechanisms involved in heterotrimeric G-protein coupling to the receptor, activation of the downstream signaling pathway by G proteins and the Ang II signal transduction pathways leading to specific cellular responses are discussed. In addition, recent work on the identification and characterization of novel proteins associated with carboxy1-terminus of the AT1 receptor is presented. These novel proteins will advance our understanding of how the receptor is internalized and recycled as they provide molecular mechanisms for the activation and regulation of G-protein-coupled receptors.

关键词： RAS Ang II receptor internalization recycling yeast two-hybrid system.

Up-scaled Teer-UDP850/4 Unbalanced Magnetron Deposition System Used for Mass-Production of CrTiAIN Hard Coatings

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材料热处理学报 2004年第5B期25卷 827-831页

作者： ZHANGguo-jun YANGShi-cai JIANGBai-ling BAILi-jing CHENDi-chum WENXiao-bin TEERD.G. SchoolofMateriafsScienceandEngineering.Xi＇anUniversityofTechnology Xi＇an.China TeerCoatingsLtd. 290HartleburyTradingEstateHartleburyWorcs.U.K.

Up-scaled deposition process of Teer-UDP850/4 has been established and used for massive production of CrTiAIN hard coatings in applications of anti-wear, cutting and forming tools. This deposition system uses four magnetrons that are arranged by unbalanced magnets to form closed magnetic field enabling the system running in high current density. Elemental metals of Cr, Ti and Al are used as the target materials which are co-deposited with nitrogen forming multialloy nitride, nanoscale multi-layer or superlattice hard coatings. The substrate turntable is desfgned as planet rotation mechanism with three folds so that components or tools with complicate geometry can be uniformly coated onto all their surfaces and cutting edges. The power units for the magnetrons are straight dc whilst the substrate is biased by pulsed dc. Two solid heaters are installed in the system to enable running a wide range of deposition temperature from 200°C to 500°C. The pumping system is powerful that incorporated with a polycold to pump the system to a good vacuum in a very short time. A front door and a movable substrate table are available to benefit easily loading and unloading. Deposition procedure, properties and performance of the coatings is also presented in this paper.

关键词：不平衡磁控管溅射 CrTiAlN 硬质合金涂层热处理

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基于支持向量机的客户流失预测模型

系统工程理论与实践 2008年第1期28卷 71-77页

作者：夏国恩金炜东广西财经学院工商管理系南宁530003 西南交通大学经济管理学院成都610031

应用基于结构风险最小化准则的支持向量机(SVM)进行客户流失预测,以提高机器学习方法的预测能力,并以国内、国外电信公司客户流失预测为实例,与人工神经网络、决策树、贝叶斯分类器等方法进行了对比,发现该方法能获得最好的正确率、命... 详细信息

应用基于结构风险最小化准则的支持向量机(SVM)进行客户流失预测,以提高机器学习方法的预测能力,并以国内、国外电信公司客户流失预测为实例,与人工神经网络、决策树、贝叶斯分类器等方法进行了对比,发现该方法能获得最好的正确率、命中率、覆盖率和提升系数,是研究客户流失预测问题的有效方法.

关键词：客户流失支持向量机电信业

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客户流失预测的现状与发展研究

计算机应用研究 2010年第2期27卷 413-416页

作者：夏国恩广西财经学院工商管理系南宁530003

根据客户流失预测研究的发展历程和智能化程度的高低,将客户流失预测研究划分为三个阶段,包括基于传统统计学的预测方法、基于人工智能的预测方法和基于统计学习理论的预测方法,并通过分析每个阶段存在的问题提出了未来可研究的方向。

关键词：客户流失支持向量机预测模型

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一种基于Chord的抗Churn策略

计算机工程 2011年第3期37卷 96-98页

作者：任庆杰禹继国张云曲阜师范大学计算机科学学院山东日照276826

利用覆盖网络节点之间的远近邻居关系,修改节点路由指针表,提出基于Chord的抗抖动(Churn)策略。修改节点路由并行度和应对Churn的维护策略。实验结果表明,当搜索路由源节点和目的节点确定时,该策略可降低Chord系统在Churn的网络环境中... 详细信息

利用覆盖网络节点之间的远近邻居关系,修改节点路由指针表,提出基于Chord的抗抖动(Churn)策略。修改节点路由并行度和应对Churn的维护策略。实验结果表明,当搜索路由源节点和目的节点确定时,该策略可降低Chord系统在Churn的网络环境中的维护开销,有效地提高系统抗Churn能力和搜索成功率。

关键词：抖动节点邻居 Chord维护策略

高校图书馆微信公众平台用户流失行为模型及其影响因素分析

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图书情报工作 2017年第2期61卷 57-66页

作者：郭顺利张向先相甍甍吉林大学管理学院长春130022

[目的 /意义]构建高校图书馆微信公众平台用户流失行为模型,分析用户流失的影响因素,有助于减少高校图书馆微信公众平台的用户流失,为高校图书馆微信公众平台运营推广提供理论依据和参考建议。[方法/过程]首先借鉴S-O-R理论构建高校图... 详细信息

[目的 /意义]构建高校图书馆微信公众平台用户流失行为模型,分析用户流失的影响因素,有助于减少高校图书馆微信公众平台的用户流失,为高校图书馆微信公众平台运营推广提供理论依据和参考建议。[方法/过程]首先借鉴S-O-R理论构建高校图书馆微信公众平台用户流失行为模型,并结合民族志决策树方法设计访谈问卷,采用扎根理论方法抽取影响因素及各因素之间关系。然后借助解释结构方程模型分析影响因素。最后根据分析结论提出相应的对策和建议。[结果 /结论]构建高校图书馆微信公众平台用户流失行为模型和影响因素的解释结构模型,分析影响因素的层级和相互关系,指出根本原因因素、中间层因素和表象层因素,并针对各层次影响因素和分析结果提出减少高校图书馆微信公众平台用户流失的对策和建议。

关键词：高校图书馆微信公众平台用户流失影响因素解释结构模型