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On unitary equivalence of compact operator tuples
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作者 Wei He Rongwei Yang 《Science China Mathematics》 SCIE CSCD 2023年第3期571-580,共10页
For a compact operator tuple A, if its projective spectrum P(A*) is smooth, then there exists a natural Hermitian holomorphic line bundle EAover P(A*) which is a unitary invariant for A. This paper shows that under so... For a compact operator tuple A, if its projective spectrum P(A*) is smooth, then there exists a natural Hermitian holomorphic line bundle EAover P(A*) which is a unitary invariant for A. This paper shows that under some additional spectral conditions, EAis a complete unitary invariant, i.e., EAcan determine the compact operator tuple up to unitary equivalence. 展开更多
关键词 compact operator tuple unitary equivalence projective spectrum Hermitian holomorphic bundle
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Indices of Toeplitz tuples on pseudoregular domains 被引量:2
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作者 郭坤宇 《Science China Mathematics》 SCIE 2000年第12期1258-1268,共11页
This paper proves an index theorem of Toeplitz tuples on pseudoregular domains in Cn. Geometrically, the index of Toeplitz tupleT n is (-1) n time wrapping number of φ n around the origin. As one of the applications ... This paper proves an index theorem of Toeplitz tuples on pseudoregular domains in Cn. Geometrically, the index of Toeplitz tupleT n is (-1) n time wrapping number of φ n around the origin. As one of the applications of the index theorem, we completely characterize the automorphism groups of Toeplitz algebras on Poincaré domain. As another application, it is shown thatC*(Ω)?C*(Bn) for every Poincare domain Ω inC n (n≠2). It is also noticed thatC*(Ω)?C*(B 2) if and only if the Poincaré conjecture is true for ?Ω. 展开更多
关键词 Toeplitz tuple index Poincaré domain
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Nondegeneracy of eigenvectors and singular vector tuples of tensors
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作者 Shenglong Hu 《Science China Mathematics》 SCIE CSCD 2022年第12期2483-2492,共10页
In this article, nondegeneracy of singular vector tuples, Z-eigenvectors and eigenvectors of tensors is studied, which have found many applications in diverse areas. The main results are:(ⅰ)each(Z-)eigenvector/singul... In this article, nondegeneracy of singular vector tuples, Z-eigenvectors and eigenvectors of tensors is studied, which have found many applications in diverse areas. The main results are:(ⅰ)each(Z-)eigenvector/singular vector tuple of a generic tensor is nondegenerate, and(ⅱ) each nonzero Zeigenvector/singular vector tuple of an orthogonally decomposable tensor is nondegenerate. 展开更多
关键词 tensor singular vector tuple EIGENVECTOR Z-eigenvector NONDEGENERACY generic
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联合应用经尿道气压碎石和电切治疗前列腺增生并继发膀胱结石 被引量:5
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作者 周芳坚 余大敏 +2 位作者 张向阳 谢晋良 齐范 《中国内镜杂志》 CSCD 1998年第2期5-6,共2页
对24例前列腺增生症(BPH)并继发膀胱结石的病人联合应用经尿道气压碎石(TUPL)和经尿道前列腺电切术(TURP)处理,均获满意疗效。其中9例为多发结石,15例为单发结石。发现TUPL不增加TURP手术难度,也不增加电切综合征和术后尿道狭... 对24例前列腺增生症(BPH)并继发膀胱结石的病人联合应用经尿道气压碎石(TUPL)和经尿道前列腺电切术(TURP)处理,均获满意疗效。其中9例为多发结石,15例为单发结石。发现TUPL不增加TURP手术难度,也不增加电切综合征和术后尿道狭窄等并发症。与开放性膀胱切开取石和前列腺摘除术比较,TUPL和TURP联合应用具有创伤小、效果好和节省费用之优点,应作为BPH继发膀胱结石的首选治疗方法。 展开更多
关键词 前列腺增生 并发症 膀胱结石 TUPL TURP
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FISH技术在先天畸形胎儿基因诊断中的应用探讨 被引量:5
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作者 杨京晶 梁梅英 +6 位作者 魏丽惠 张嶙 韦平 黄振宇 魏艳秋 宋桂宁 Zhong Chen 《中国妇产科临床杂志》 2008年第2期128-130,共3页
目的应用荧光原位杂交技术(FISH)研究先天畸形胎儿中先心病相关基因的表达缺失率。方法选取在北京大学人民医院产前诊断为胎儿先天畸形病例31例,其中心血管畸形16例,非心血管畸形15例。产前经脐带血穿刺留取胎儿血。选取同期正常新生儿1... 目的应用荧光原位杂交技术(FISH)研究先天畸形胎儿中先心病相关基因的表达缺失率。方法选取在北京大学人民医院产前诊断为胎儿先天畸形病例31例,其中心血管畸形16例,非心血管畸形15例。产前经脐带血穿刺留取胎儿血。选取同期正常新生儿12例作为对照组,分娩时留取脐血。应用间期FISH方法,检测畸形胎儿及正常新生儿的TUPLE1基因表达缺失率。结果正常新生儿组与先天畸形胎儿组TUPLE1基因表达缺失率分别为0%和35.48%,两组相比较差异有显著性(P<0.05)。心血管畸形与非心血管畸形胎儿组的TUPLE1基因表达缺失率分别为43.75%及26.67%,两组比较,差异无显著性(P>0.05)。结论TUPLE1基因因素是胎儿先天性畸形的重要病因。 展开更多
关键词 荧光原位杂交 先天性心血管畸形 22q11微缺失综合征 TUPLE1基因
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BOOTSTRAPPING FOR EXTRACTING RELATIONS FROM LARGE CORPORA 被引量:5
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作者 Li Weigang Liu Ting Li Sheng 《Journal of Electronics(China)》 2008年第1期89-96,共8页
A new approach of relation extraction is described in this paper. It adopts a bootstrap- ping model with a novel iteration strategy, which generates more precise examples of specific relation. Compared with previous m... A new approach of relation extraction is described in this paper. It adopts a bootstrap- ping model with a novel iteration strategy, which generates more precise examples of specific relation. Compared with previous methods, the proposed method has three main advantages: first, it needs less manual intervention; second, more abundant and reasonable information are introduced to represent a relation pattern; third, it reduces the risk of circular dependency occurrence in bootstrapping. Scalable evaluation methodology and metrics are developed for our task with comparable techniques over TianWang 100G corpus. The experimental results show that it can get 90% precision and have excellent expansibility. 展开更多
关键词 Relation extraction BOOTSTRAPPING PATTERNS tuples
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基于共享空间的移动Agent交互
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作者 王红 曾广周 林守勋 《计算机工程与应用》 CSCD 北大核心 2003年第17期83-86,共4页
在移动agent应用环境中,agent并不是孤立地完成任务,它需要经常与其它agent交互并不断地与环境交互。而基于TupleSpace的交互模型已经被证明是最适合于移动agent环境的。该文将基于TupleSpace的交互模型进行智能性扩展,使其不仅具有反... 在移动agent应用环境中,agent并不是孤立地完成任务,它需要经常与其它agent交互并不断地与环境交互。而基于TupleSpace的交互模型已经被证明是最适合于移动agent环境的。该文将基于TupleSpace的交互模型进行智能性扩展,使其不仅具有反应力而且具有推理和学习能力,并将该模型作为移动agent系统中的交互媒体,支持移动agent之间、agent与系统资源间的交互。实际上,该模型松散耦合到移动agent环境,因而不仅支持交互,它还支持任何异质环境中(包括移动agent系统)的安全问题、效率问题及灵活性问题的解决。 展开更多
关键词 移动AGENT 交互 智能Tuple Space(ITS)
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A Multi-Tuple Rough Set Approach for Information Retrieval
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作者 马志锋 邢汉承 郑晓妹 《Journal of Southeast University(English Edition)》 EI CAS 1999年第1期63-68,共6页
How to deal with the imprecise information retrieval has become more and more important in the present information society. An efficient and effective method of information retrieval based on multi tuple rough set is... How to deal with the imprecise information retrieval has become more and more important in the present information society. An efficient and effective method of information retrieval based on multi tuple rough set is discussed in this paper. The new approach is considered as a generalization of the original rough set model for flexible information retrieval. The imprecise query results can be obtained by multi tuple approximations. 展开更多
关键词 multi tuple rough set information retrieval information system
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基于稀疏RAM的逼近型N-TUPLE神经网络模型
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作者 彭宏京 陈松灿 《小型微型计算机系统》 CSCD 北大核心 2004年第10期1788-1791,共4页
将单层查找感知器 (SL L UP)中的 RAM式神经元替换为稀疏 RAM神经元 ,获得了一个基于稀疏 RAM的逼近型 N- tuple神经网络新模型 .新模型不仅可以缓和原 SL L UP的存储容量易于饱和的问题 ,而且使网络的表示更灵活、更广泛 ,更重要的是使... 将单层查找感知器 (SL L UP)中的 RAM式神经元替换为稀疏 RAM神经元 ,获得了一个基于稀疏 RAM的逼近型 N- tuple神经网络新模型 .新模型不仅可以缓和原 SL L UP的存储容量易于饱和的问题 ,而且使网络的表示更灵活、更广泛 ,更重要的是使得 N- tuple类型的网络直接处理大维数的样本、大样本集类的数据真正成为可能 ,而不需要二值化样本 . 展开更多
关键词 单层查找感知器 N—tuple网络 稀疏RAM
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基于空间的编程 被引量:1
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作者 ANGERER Bernhard 王彤 +1 位作者 周念军 刘英博 《计算机应用研究》 CSCD 北大核心 2008年第10期3022-3025,共4页
全面地介绍了一种基于空间的中间层编程方法。这是一种以分布式虚拟共享内存为技术基础设施的新型编程方法。其重要性在于它将分布计算的语义环境和问题领域的语义环境在极大程度上相分离,从而可以为今天软件体系结构中存在的种种问题... 全面地介绍了一种基于空间的中间层编程方法。这是一种以分布式虚拟共享内存为技术基础设施的新型编程方法。其重要性在于它将分布计算的语义环境和问题领域的语义环境在极大程度上相分离,从而可以为今天软件体系结构中存在的种种问题提供具有持续可靠性的解决方案。 展开更多
关键词 协调中间件 基于代理的体系结构 基于空间的体系结构 数据网格 Tuple空间 Java空间
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输尿管气压弹道碎石术和微创经皮肾镜碎石术治疗输尿管上段结石的比较分析 被引量:6
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作者 翁文锋 董超雄 何祖强 《岭南现代临床外科》 2013年第4期329-331,共3页
目的探讨输尿管气压弹道碎石术和微创经皮肾镜碎石术治疗输尿管上段结石临床疗效。方法选取2009年月8月~2011年8月我院接受治疗的80例输尿管上段结石患者为研究对象,按照随机化原则将其随机分为观察组(40例)和对照组(40例)。观察组行... 目的探讨输尿管气压弹道碎石术和微创经皮肾镜碎石术治疗输尿管上段结石临床疗效。方法选取2009年月8月~2011年8月我院接受治疗的80例输尿管上段结石患者为研究对象,按照随机化原则将其随机分为观察组(40例)和对照组(40例)。观察组行输尿管气压弹道碎石术(TUPL),对照组行微创经皮肾镜碎石术,比较两组患者手术时间、术中出血量、术后住院时间,术后并发症发生率、碎石成功率、结石排出率。结果在碎石成功率、结石排出率这两项指标上,对照组要显著高于观察组(P<0.05),而在手术时间、术中出血量、术后住院时间,术后并发症发生率这四项指标的比较上观察组要显著低于对照组(P<0.05)。结论 TUPL治疗输尿管上段结石的疗效较MIP稍差,但出血少、并发症低,临床医师多根据医院设备条件及结石位置、大小、输尿管通过性等不同情况选择适当的治疗方式。 展开更多
关键词 输尿管气压弹道碎石术(TUPL) 微创经皮肾镜碎石术(MIP) 输尿管上段结石 临床疗效
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邯钢程控测试系统改造
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作者 姚洪波 张洁 田学东 《数字技术与应用》 2010年第5期117-118,共2页
为了满足测试设备集中管理的要求,提高电讯维护管理工作的自动化水平,开发了测试联网系统。该系统投入使用后,不仅大大提高了测量的工作效率,而且极大地减轻了线路维护人员的劳动强度。
关键词 测试联网 程控交换 RELATION TUPLE
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基于稀疏RAM的N-tuple神经网络的足球机器人识别法
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作者 彭金华 《江西电力职业技术学院学报》 CAS 2006年第2期41-42,62,共3页
提出了一种采用稀疏RAM的N-tuple神经网络(SN-tuple)的方法,用在足球机器人比赛时,根据图像快速识别队员。通过大量实验证明,该方法有效地解决了传统BP神经网络收敛速度慢、易陷入局部最小值的问题,对机器人队员和足球位置的识别稳定可靠。
关键词 足球机器人 N—tuple神经网络 机器视觉
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Abstraction from Constructors and Functional Constructors and Their Applications
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作者 Kazuhiko Kakehi 1, Robert Gluck 2, Yoshihiko Futamura 3 1 JSPS Research Fellow Graduate School of Science and Engineering, Waseda University,Tokyo 169 8555, Japan 2 PRESTO, JST & Institute for Software Production Technology, Waseda Universi 《Wuhan University Journal of Natural Sciences》 CAS 2001年第Z1期368-374,共7页
Structures using constructors are of ordinary use in functional programming to represent data structures of unbound size. Lack of associativity of constructors, however, hinders program analyses or efficient execution... Structures using constructors are of ordinary use in functional programming to represent data structures of unbound size. Lack of associativity of constructors, however, hinders program analyses or efficient executions. This paper describes ideas of abstraction toward constructors, and similarly abstraction from constructing functions, which we call functional constructors. We demonstrate our ideas making program analyses easier and enable transformation to efficient execution. 展开更多
关键词 program transformation lambda abstraction CONSTRUCTORS recursion removal tupling
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Statistic-based Target Word Selection in English-Chinese Machine Translation
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作者 刘小虎 李生 张波 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 1999年第1期46-49,共4页
How to select appropriate wolds in a translation is a significant problem in current studies of machine translation, because it directly decides the translation quality. This paper uses an unsupervised corpus-based st... How to select appropriate wolds in a translation is a significant problem in current studies of machine translation, because it directly decides the translation quality. This paper uses an unsupervised corpus-based statisticalmethod to select target word. Based on the concurrence probabilities, all ambiguous words in a sentence are disambiguated at the same time. Because a corpus of limited size cannot cover all the collocation of words, we use an effectivesmoothing method to increase the coverage of the corpus. In ceder to solve the problem in our English-Chinese MT system, we have applied the algorithm to disambiguate senses of verbs, nouns and adjectitves in target language, and theresult shows that the approach is very promising. 展开更多
关键词 TARGET WORD SELECTION SYNTACTIC TUPLE machine TRANSLATION
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Query Languages for Temporal Database
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作者 邓培民 《High Technology Letters》 EI CAS 1997年第2期47-51,共5页
In this paper, an interval-gap-based 1NF temporal tuple calculus language and the corresponding temporal relation algebra are established on the basis of considering the trouble of stack operations in both S. Gadia’s... In this paper, an interval-gap-based 1NF temporal tuple calculus language and the corresponding temporal relation algebra are established on the basis of considering the trouble of stack operations in both S. Gadia’s TCAL and temporal tuple calculus due to their NINF. 展开更多
关键词 TEMPORAL database SQL TEMPORAL RELATION ALGEBRA TUPLE CALCULUS QUERY language
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Positive-Definite Operator-Valued Kernels and Integral Representations
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作者 L. Lemnete-Ninulescu 《Applied Mathematics》 2012年第12期1990-1999,共10页
A truncated trigonometric, operator-valued moment problem in section 3 of this note is solved. Let be a finite sequence of bounded operators, with arbitrary, acting on a finite dimensional Hilbert space H. A necessary... A truncated trigonometric, operator-valued moment problem in section 3 of this note is solved. Let be a finite sequence of bounded operators, with arbitrary, acting on a finite dimensional Hilbert space H. A necessary and sufficient condition on the positivity of an operator kernel for the existence of an atomic, positive, operator-valued measure , with the property that for every with , the moment of coincides with the term of the sequence, is given. The connection between some positive definite operator-valued kernels and the Riesz-Herglotz integral representation of the analytic on the unit disc, operator-valued functions with positive real part in the class of operators in Section 4 of the note is studied. 展开更多
关键词 Unitary-Operator SELF-ADJOINT OPERATOR Joint SPECTRAL Measure of a COMMUTING TUPLE of Operators SPECTRAL Projector Complex Moments Analytic Vectorial Functions
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Stability of Operator-Valued Truncated Moment Problems
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作者 L. Lemnete-Ninulescu 《Applied Mathematics》 2013年第4期718-733,共16页
In this note a multidimensional Hausdorff truncated operator-valued moment problem, from the point of view of “stability concept” of the number of atoms of the obtained atomic, operator-valued representing measure f... In this note a multidimensional Hausdorff truncated operator-valued moment problem, from the point of view of “stability concept” of the number of atoms of the obtained atomic, operator-valued representing measure for the terms of a finite, positively define kernel of operators, is studied. The notion of “stability of the dimension” in truncated, scalar moment problems was introduced in [1]. In this note, the concept of “stability” of the algebraic dimension of the obtained Hilbert space from the space of the polynomials of finite, total degree with respect to the null subspace of a unital square positive functional, in [1], is adapted to the concept of stability of the algebraic dimension of the Hilbert space obtained as the separated space of some space of vectorial functions with respect to the null subspace of a hermitian square positive functional attached to a positive definite kernel of operators. In connection with the stability of the dimension of such obtained Hilbert space, a Hausdorff truncated operator-valued moment problem and the stability of the number of atoms of the representing measure for the terms of the given operator kernel, in this note, is studied. 展开更多
关键词 Operator-Valued Positive-Definite Function Unitary-Operator Selfadjoint OPERATOR Joint Spectral MEASURE of a COMMUTING TUPLE of Operators Atomic MEASURE Extension of Some HERMITIAN Square POSITIVE Functional
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“Boost技术与应用”系列文章4 Boost.Tuple(上)——兼谈Loki.Tuple
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作者 侯捷 《程序员》 2007年第8期94-99,共6页
所谓Tuple,用来将多个对象组合为单一对象,看似简单,但若以暴力法硬做,层次很低。本篇探讨了Loki对此主题的精巧作法。
关键词 延伸性 Boost.Tuple Loki.Tuple 计算机程序
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High-Performance Flow Classification of Big Data Using Hybrid CPU-GPU Clusters of Cloud Environments
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作者 Azam Fazel-Najafabadi Mahdi Abbasi +5 位作者 Hani H.Attar Ayman Amer Amir Taherkordi Azad Shokrollahi Mohammad R.Khosravi Ahmed A.Solyman 《Tsinghua Science and Technology》 SCIE EI CAS CSCD 2024年第4期1118-1137,共20页
The network switches in the data plane of Software Defined Networking (SDN) are empowered by an elementary process, in which enormous number of packets which resemble big volumes of data are classified into specific f... The network switches in the data plane of Software Defined Networking (SDN) are empowered by an elementary process, in which enormous number of packets which resemble big volumes of data are classified into specific flows by matching them against a set of dynamic rules. This basic process accelerates the processing of data, so that instead of processing singular packets repeatedly, corresponding actions are performed on corresponding flows of packets. In this paper, first, we address limitations on a typical packet classification algorithm like Tuple Space Search (TSS). Then, we present a set of different scenarios to parallelize it on different parallel processing platforms, including Graphics Processing Units (GPUs), clusters of Central Processing Units (CPUs), and hybrid clusters. Experimental results show that the hybrid cluster provides the best platform for parallelizing packet classification algorithms, which promises the average throughput rate of 4.2 Million packets per second (Mpps). That is, the hybrid cluster produced by the integration of Compute Unified Device Architecture (CUDA), Message Passing Interface (MPI), and OpenMP programming model could classify 0.24 million packets per second more than the GPU cluster scheme. Such a packet classifier satisfies the required processing speed in the programmable network systems that would be used to communicate big medical data. 展开更多
关键词 OPENMP Compute Unified Device Architecture(CUDA) Message Passing Interface(MPI) packet classification medical data tuple space algorithm Graphics Processing Unit(GPU)cluster
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