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| 1 | The construction of Markov processes in random environments and the equivalence theorems显示文摘In sec.1, we introduce several basic concepts such as random transition function, p-m process and Markov process in random environment and give some examples to construct a random transition function from a non-homogeneous density function. In sec.2, we construct the Markov process in random enviromment and skew product Markov process by p - m process and investigate the properties of Markov process in random environment and the original process and environment process and skew product process. In sec. 3, we give several equivalence theorems on Markov process in random environment. | HU DiheSchool of Mathematics and Statistics, Wuhan University, Wuhan 430072, China | 2004 | Science China Mathematics2004，47，4： | 27 |
| 2 | 一种新型Skew Tent映射的混沌混合优化算法显示文摘针对已有的混沌优化算法几乎都是利用Logistic映射作为混沌序列发生器,而该混沌序列的概率密度函数呈两头多、中间少的切比雪夫型的分布性质,不利于搜索的效率和能力,为此,首先构造一种新型混沌映射序列发生器—Skew Tent映射并结合迭代优化特点加以改进,然后分析了它的混沌特性.其次,将改进的混沌映射与Alopex启发算法相结合,充分发挥Alopex算法的快速搜索能力和混沌优化全局寻优的特性,提出一种混沌混合优化算法,提高了算法的收敛速度和有效搜索全局最优解.最后,仿真算例验证了该算法的有效性和Skew Tent混沌映射的应用前景. | 江善和 王其申 江巨浪 | 2007 | 控制理论与应用2007，24，2： | 14 |
| 3 | The Relations Among Various Markov Chains显示文摘Some basic equations and the relations among various Markov chains are established. These works are the bases in the investigation of the theory of Markov chain in random environment. | Hu Di\|he College of Mathematics and Statistics,Wuhan University, Wuhan 430072, China | 2001 | Wuhan University Journal of Natural Sciences2001，6，3： | 8 |
| 4 | 基于ARMA-APARCH-SGED模型的原油价格风险度量研究显示文摘从原油现货市场收益率的特征分析着手,为了更好地描述原油现货市场收益率的尖峰厚尾、偏态和波动集聚等特性,利用APARCH模型来刻画收益率的波动性,同时利用Skew GED(SGED)分布来描述收益率的概率分布特征;进而运用ARMA-APARCH-SGED模型对原油现货市场收益率的VaR进行估计和分析,并与基于Skew-t和GED分布的ARMA-APARCH模型进行比较。通过返回检验,结果表明,AR-MA-APARCH-SGED模型能更加准确地度量原油现货市场的风险价值。 | 杨爱军 肖振宇 | 2011 | 统计与信息论坛2011，26，8： | 7 |
| 5 | A Joint Laplace Transform for Pre-exit Diffusion of Occupation Times显示文摘For a < r < b, the approach of Li and Zhou(2014) is adopted to find joint Laplace transforms of occupation times over intervals(a, r) and(r, b) for a time homogeneous diffusion process before it first exits from either a or b. The results are expressed in terms of solutions to the differential equations associated with the diffusions generator. Applying these results, we obtain more explicit expressions on the joint Laplace transforms of occupation times for Brownian motion with drift, Brownian motion with alternating drift and skew Brownian motion, respectively. | Ye CHEN Xiang Qun YANG Ying Qiu LI Xiao Wen ZHOU | 2017 | Acta Mathematica Sinica,English Series2017，33，4： | 5 |
| 6 | NUMERICAL COMPUTATION OF THE DIFFUSION OF THE CONTAMINANTS AND THE FLOW FIELD OF SKEW DISCHARGES INTO A CHANNEL显示文摘NUMERICAL COMPUTATION OF THE DIFFUSION OF THE CONTAMINANTS AND THE FLOW FIELD OF SKEW DISCHARGES INTO A CHANNELNUMERICALCOMPU... | Lu Zhi-ming Liu Yu-ln (Shanghai Ins. of Appl. Math. & Mech. Shanghai University, Shanghai 200072, P. R.China.) | 1996 | Journal of Hydrodynamics1996，8，3： | 3 |
| 7 | 3D Rigid-Plastic Finite Element Analysis for Skew Rolling Process of the Stepped Part显示文摘Based on rigid-plastic finite element method, a skew rolling process of stepped part is simulated. Considering nodesaving and effective remeshing, the tetrahedron solid elements are used to discrete workpiece. The workpiece material adopts rigid-plastic model, where the flow stress is function of effective strain, effective strain rate and temperature.The thermomechanical coupling is considered in the simulation. To model the spinning workpiece undergoing plastic deformation, a novel solution is presented and applied in this paper. The stress state in the workpiece and forming characteristic of skew rolling are analyzed. The forming load, including roller torque and forces in three directions are predicted. The above analyses are helpful to understanding of forming mechanisms and improving of process and die design. | Gang FANG Pan ZENG | 2003 | Journal of Materials Science & Technology2003，19，z1： | 2 |
| 8 | Distributed Time Synchronization in Wireless Sensor Networks via Second-Order Consensus Algorithms显示文摘This paper proposes a distributed second-order consensus time synchronization, which incorporates the second-order consensus algorithm into wireless sensor networks. Since local clocks may have different skews and offsets, the algorithm is designed to include offset compensation and skew compensation. The local clocks are not directly modified, thus the virtual clocks are built according to the local clocks via the compensation parameters. Each node achieves a virtual consensus clock by periodically updated compensation parameters. Finally, the effectiveness of the proposed algorithm is verified through a number of simulations in a mesh network. It is proved that the proposed algorithm has the advantage of being distributed, asymptotic convergence, and robust to new node joining. | 吴杰 白煜 张立毅 | 2015 | Transactions of Tianjin University2015，21，2： | 2 |
| 9 | AFDX网络冗余管理技术分析显示文摘为实现AFDX以太网的冗余管理功能,分析了AFDX网络冗余管理技术和冗余管理接收与发送帧过程中的完整性检查以及冗余管理配置参数最大偏移参数(Skew Max)。文中根据完整性检查来分析顺序号在接收端与发送端的作用以及冗余管理配置参数,设计了冗余管理算法。并对设计的冗余管理算法进行了仿真验证,结果表明,该设计的冗余管理算法可靠准确,设计符合ARINC664 Part7规定的协议要求。 | 徐进 黄玉港 王静玲 田瑜 张小龙 | 2017 | 电子科技2017，30，3： | 2 |
| 10 | 高速信号传输线缆技术分析显示文摘文章通过分析影响高速信号传输线通信速度和通信可靠性的因素,重点对1000BASE-CX和PECL信号传输进行分析并提出传输距离的计算方法,提出一种高速信号传输线的测试方法。 | 郑磊 | 2010 | 中国高新技术企业2010，，16： | 2 |
| 11 | 同步电路设计中CLOCK SKEW的分析显示文摘Clock skew是数字集成电路设计中一个重要的因素。本文比较了在同步电路设计中 0 clock skew和非 0clock skew时钟分布对电路性能的影响 ,分析了通过调整时钟树中 CL OCK SKEW来改善电路性能的方法 ,从而说明非 0 clock skew时钟分布是如何提高同步电路运行的最大时钟频率的。 | 康军 黄克勤 张嗣忠 | 2002 | 电子器件2002，25，4： | 2 |
| 12 | The Hall Algebra of Cyclic Serial Algebra显示文摘In this paper, orders <1 and <2 on ((Z)+)nm are introduced and also regarded as orders on the isomorphism classes of finite modules of finite .cyclic algebra R with n simple modules and all the indecomposable projective modules have length m through a one-to-one correspondence between ((Z)+)nm and the isomorphism classes of finite R modules. Using this we prove that the Hall algebra of a cyclic serial algebra is identified with its Loewy subalgebra, and its rational extension has a basis of BPW type, and is a (((Z)+)nm, <2) filtered ring with the associated graded ring as an iterated skew polynomial ring. These results are also generalized to the Hall algebra of a tube over a finite field. | 郭晋云 | 1994 | Science China Mathematics1994，37，7： | 1 |
| 13 | Excellent Extensions and Homological Conjectures显示文摘In this paper,we introduce the notion of excellent extensions of rings.Let F be an excellent extension of an Artin algebra∧,we prove that∧satisfies the Gorenstein symmetry conjecture(resp.,finitistic dimension conjecture,Auslander-Gorenstein conjecture,Nakayama conjecture)if and only if so does F.As a special case of excellent extensions,when G is a finite group whose order is invertible in∧acting on∧and∧is G-stable,we prove that if the skew group algebra∧G satisfies strong Nakayama conjecture(resp.,generalized Nakayama conjecture),then so does∧. | Yingying Zhang | 2018 | Algebra Colloquium2018，25，4： | 1 |
| 14 | 广义波动率指数在我国资本市场的构建及应用显示文摘成熟的资本市场上,波动率指数对判断市场情绪具有重要参考价值,本文按照CBOE公告的VIX和SKEW编制方法,以50ETF期权为编制基础,构建我国资本市场的VIX与SKEW指数,以此作为市场情绪判断和投资应用的参考依据。结果表明:VIX指数在预警或提示我国市场极值风险时具有较强效果,但与市场日常收益率波动的相关性较弱,SKEW指数表现则相反;VIX策略的投资绩效良好,SKEW策略的投资绩效一般。 | 赵淑曼 易蓉 | 2019 | 中国证券期货2019，0，4： | 1 |
| 15 | 基于有限状态混沌映射的扩频序列(英文)显示文摘基于skewtent映射 ,提出了一类离散化的有限状态混沌映射 ,它允许精确的数值计算 ,没有舍入误差 .通过选择合适的参数 ,该映射能产生全周期长度的序列 .实验表明 ,归一化的序列平均周期对计算机精度不敏感 ,生成的二进制序列具有良好的相关性能 ,是扩频码的良好选择。 | 罗伟民 Wang Muzhong 丘水生 | 2002 | 华南理工大学学报(自然科学版)2002，30，1： | 1 |
| 16 | A parametric bootstrap approach for one-way classification model with skew-normal random effects显示文摘In this paper,several properties of one-way classification model with skew-normal random effects are obtained,such as moment generating function,density function and noncentral skew chi-square distribution,etc.Based on the EM algorithm,we discuss the maximum likelihood(ML)estimation of unknown parameters.For testing problem of fixed effect,a parametric bootstrap(PB)approach is developed.Finally,some simulation results on the Type I error rates and powers of the PB approach are obtained,which show that the PB approach provides satisfactory performances on the Type I error rates and powers,even for small samples.For illustration,our main results are applied to a real data problem. | YE Ren-dao XU Li-jun LUO Kun JIANG Ling | 2019 | Applied Mathematics(A Journal of Chinese Universities)2019，34，4： | 1 |
| 17 | Convolutional Neural Network Based Intelligent Handwritten Document Recognition显示文摘This paper presents a handwritten document recognition system based on the convolutional neural network technique.In today’s world,handwritten document recognition is rapidly attaining the attention of researchers due to its promising behavior as assisting technology for visually impaired users.This technology is also helpful for the automatic data entry system.In the proposed systemprepared a dataset of English language handwritten character images.The proposed system has been trained for the large set of sample data and tested on the sample images of user-defined handwritten documents.In this research,multiple experiments get very worthy recognition results.The proposed systemwill first performimage pre-processing stages to prepare data for training using a convolutional neural network.After this processing,the input document is segmented using line,word and character segmentation.The proposed system get the accuracy during the character segmentation up to 86%.Then these segmented characters are sent to a convolutional neural network for their recognition.The recognition and segmentation technique proposed in this paper is providing the most acceptable accurate results on a given dataset.The proposed work approaches to the accuracy of the result during convolutional neural network training up to 93%,and for validation that accuracy slightly decreases with 90.42%. | Sagheer Abbas Yousef Alhwaiti Areej Fatima Muhammad A.Khan Muhammad Adnan Khan Taher M.Ghazal Asma Kanwal Munir Ahmad Nouh Sabri Elmitwally | 2022 | Computers, Materials & Continua2022，，3： | 1 |
| 18 | Dubrovin Valuation Skew Group Rings | YI Zhong Department of Mathematics.Guangxi Normal University.Guilin 541004,P.R.China E-mail:zyi@mailbox.gxnu.edu.cn | 2002 | Acta Mathematica Sinica,English Series2002，18，2： | 0 |
| 19 | Influence of Slope and Slenderness Ratio on the Non-Column Volume in Skew Rolling显示文摘A definition of non-column volume ratio (NCVR) is brought forward by the authors. It is influenced greatly by the slendernessratio of the cylindrical billet and the slope of the wedge on the tool of skew rolling. Using the numerical simulation, the lawof variation in NCVR during the forming process is found out. At the same time experiments have been carried out underdifferent conditions, the result of which are found to be in good agreement with the theoretical predictions. | Yongqiang KANG Zhenghuan HU Jinping LIU Cuiping YANG Huiping DU | 2003 | Journal of Materials Science & Technology2003，19，z1： | 0 |
| 20 | ARNOLDI REDUCTION ALGORITHM FOR LARGE SCALE GYROSCOPIC EIGENVALUE PROBLEM显示文摘Based on Arnoldi’s method, a version of generalized Arnoldi algorithm has been devel-oped for the reduction of gyroscopic eigenvalue problems. By utilizing the skew symmetry of systemmatrix, a very simple recurrence scheme, named gyroscopic Arnoldi reduction algorithm has been ob-tained, which is even simpler than the Lanczos algorithm for symmetric eigenvalue problems. Thecomplex number computation is completely avoided. A restart technique is used to enable the reductionalgorithm to have iterative characteristics. It has been found that the restart technique is not only ef-fective for the convergence of multiple eigenvalues but it also furnishes the reduction algorithm with atechnique to check and compute missed eigenvalues. By combining it with the restart technique, the al-gorithm is made practical for large-scale gyroscopic eigenvalue problems. Numerical examples are giv-en to demonstrate the effectiveness of the method proposed. | Zheng Zhaochang Ren Gexue, Department of Engineering Mechanics, Tsinghua University, Beijing 100084 | 1996 | Acta Mechanica Solida Sinica1996，9，2： | 0 |
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