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Efficient estimation for additive hazards regression with bivariate current status data

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Science china mathematics 2012年第4期55卷 763-774页

作者： TONG XingWei 1,,HU Tao 2 & SUN JianGuo 3,4 1 School of Mathematical Sciences,Beijing Normal university,Beijing 100875,china 2 School of Mathematical Sciences,Capital Normal university,Beijing 100048,china 3 School of mathematics,jilin university,changchun 130012,china 4 department of Statistics,university of Missouri,Columbia,MO 65211,USA 1. School of Mathematical Sciences Beijing Normal University Beijing 100875 China2. School of Mathematical Sciences Capital Normal University Beijing 100048 China3. School of Mathematics Jilin University Changchun 130012 China4. Department of Statistics University of Missouri Columbia MO 65211 USA

This paper discusses efficient estimation for the additive hazards regression model when only bivariate current status data are available. Current status data occur in many fields including demographical studies and tumorigenicity experiments （Keiding, 1991; Sun, 2006） and several approaches have been proposed for the additive hazards model with univariate current status data （Linet M., 1998; Martinussen and Scheike, 2002）. For bivariate data, in addition to facing the same problems as those with univariate data, one needs to deal with the association or correlation between two related failure time variables of interest. For this, we employ the copula model and an efficient estimation procedure is developed for inference. Simulation studies are performed to evaluate the proposed estimates and suggest that the approach works well in practical situations. An illustrative example is provided.

关键词： bivariate current status data copula model counting processes efficient estimation joint survivalfunction

Simulating the Folding Pathway of RNA Secondary Structure Using the Modified Ant Colony Algorithm

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Journal of Bionic Engineering 2010年第4期7卷 382-389页

作者： Jun Yu~(1,2),Changhai Zhang~(1,2),Yuanning Liu~(1,2),Xin Li~(1,2) 1.College of Computer Science and Technology,jilin university,changchun 130012,P.R.china 2.Key Laboratory of Symbolic Computation and Knowledge Engineering (Ministry of Education,china) jilin university,changchun 130012,P.R.china [a] College of Computer Science Technology Jilin University Changchun 130012 P. R. China [b] Key Laboratory of Symbolic Computation Knowledge Engineering (Ministry of Education China) Jilin University Changchun 130012 P. R. China

A new method for simulating the folding pathway of RNA secondary structure using the modified ant colony algorithmis *** a given RNA sequence,the set of all possible stems is obtained and the energy of each stem iscalculated and stored at the initial ***,a more realistic formula is used to compute the energy ofmulti-branch loop in the following *** a folding pathway is simulated,including such processes as constructionof the heuristic information,the rule of initializing the pheromone,the mechanism of choosing the initial andnext stem and the strategy of updating the pheromone between two different *** by testing RNA sequences withknown secondary structures from the public databases,we analyze the experimental data to select appropriate values *** measure indexes show that our procedure is more consistent with phylogenetically proven structures thansoftware RNAstructure sometimes and more effective than the standard Genetic Algorithm.

关键词： RNA secondary structure folding pathway ant colony algorithm

Study of OCDs Reliability Estimation System Based on Bio-Immunology

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Journal of Bionic Engineering 2009年第3期6卷 306-310页

作者： Dan-e Wu~1 Qiu-zhan Zhou~1 Ping-ping Liu~2 He-bin Zhang1.College of Communication Engineering,jilin university,Changehun 130022,P.R.china2.department of Computer Science and Technology,jilin university,changchun 130012,P.R.china [a]College of Communication Engineering Jilin University Changchun 130022 P. R. China [b]Department of Computer Science and Technology Jilin University Changchun 130012 P. R. China

We introduce the relationship between excess noise in Optoelectronic Coupled Devices (OCDs) and their interior defects and explain how low-fiequency noise can be used to estimate their *** concepts from the biological immune system and its process of identifying invaders,we present a system for estimation of the reliability of *** system has expressions for the antigen (excess noise),lymphocyte (criterion) and the role of the lymphocyte eliminating unreliable devices. A genetic algorithm was used to estimate the components parameters of the noise spectrum for estimating the reliability of *** experimental results demonstrated that this method is reliable,adaptable and practical.

关键词： low-frequency noise artificial immunity genetic algonthm device reliability

A new definition of restricted Lie superalgebras

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Chinese Science Bulletin 2000年第4期45卷 316-321页

作者： WANG Ying & ZHANG Yongzheng1. department of mathematics, Harbin Institute Technology, Harbin 150001, china 2. department of mathematics, Northeast Normal university, changchun 130024, china department of mathematics Harbin Institute Technology Harbin China department of mathematics Northeast Normal University Changchun China

A new definition of restricted Lie superalgebras has been given; some important results on the representation theory of restricted Lie superalgebra have been obtained.

关键词： restricted Lie superalgebra p-mapping p-semilinear mapping α-representation.

Complete quantum circuit of Haar wavelet based MRA

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Chinese Science Bulletin 2005年第16期50卷 1796-1798页

作者： HE Yuguo1,2 & SUN Jigui1,3 1. College of Computer Science and Technology, jilin university, changchun 130012, china 2. department of Computer Science and Engineering, Beijing Institute of Technology, Beijing 100081, china 3. Key Laboratory of Computation and Knowledge Engineering of Min-istry of Education, jilin university, changchun 130012, china College of Computer Science and Technology Jilin University Changchun 130012 China

Wavelet analysis has applications in many ar- eas, such as signal analysis and image processing. We pro- pose a method for generating the complete circuit of Haar wavelet based MRA by factoring butterfly matrices and con- ditional perfect shuffle permutation matrices. The factoriza- tion of butterfly matrices is the essential part of the design. As a result, it is the key point to obtain the circuits of I 2t ⊕ W ⊕ I 2n ? 2t ?2. In this paper, we use a simple means to de- velop quantum circuits for this kind of matrices. Similarly, the conditional permutation matrix is implemented entirely, combined with the scheme of Fijany and Williams. The cir- cuits and the ideas adopted in the design are simple and in- telligible.

关键词：量子计算量子算法量子电路 Haar微波 MRA

A family of transitive modular Lie superalgebras with depth one

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Science china mathematics 2007年第10期50卷 1451-1466页

作者： Wen-de LIU~(1+) Yong-zheng ZHANG~2 ~1 department of mathematics,Harbin Normal university,Harbin 150080,china ~2 department of mathematics,Northeast Normal university,changchun 130024,china 1. department of mathematics Harbin Normal University Harbin 150080 China 2. department of mathematics Northeast Normal University Changchun 130024 China

The embedding theorem is established for Z-graded transitive modular Lie superalgebras g■■■(g-1)satisfying the conditions: (i)g0■■(g-1) and g0-module g-1 is isomorphic to the natural■(g-1)-module; (ii)dim g1=2/3n(2n^2+1),where n=1/2dim g-1. In particular,it is proved that the finite-dimensional simple modular Lie superalgebras satisfying the conditions above are isomorphic to the odd Hamiltonian *** restricted Lie superalgebras are also considered.

关键词： flag, divided power algebra, modular Lie superalgebra, embedding theorem

Data Envelopment Analysis for Measuring Scientific Research Efficiency of Universities

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Systems Science and Systems Engineering 1993年第4期3卷 302-309页

作者： LI Shugen YANG Yinsheng CAI Zhigang department of Applied mathematics, jilin university of Technology, changchun 130025, china

In this paper, the DEA method-data envelopment analysis is used to evaluate the relative efficiency of the scientific research of universities and colleges. Three models: OCR, CCGSS and CCWH are chosen at the same tim... 详细信息

关键词： decision-making units(DMU) DEA efficiency.

Fuzzy Control of Water Tank Level and Matlab Simulation

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微计算机信息 2005年第21期 46-48页

作者： Yuan,Zheng Gao,Junming Liu,Shurong The department of Electronic Science and Engineering, jilin university, changchun, jilin 130022) (The department of Communication Engineering, jilin university, changchun, jilin 130022) (The department of Electrical Engineering, changchun Institute of Technology, changchun, jilin 130012)

When controlling the water level of a tank, whose input subjects to a property of uncertainty, the traditional control methods of PID are struggling t o achieve the satisfying objective. Instead, the fuzzy control method is widely introduced in practice. This paper discusses a typical tank system of which the water level is controlled based on the fuzzy algorithm, and makes a simulation a bout the dynamic action of the system under the platform of Matlab. The result p roves that the fuzzy method can perfectly realize the controlling objective.

关键词： Fuzzy control water tank Matlab simulation

Performance analysis of rake-MBER-equalizer for DS-UWB communication systems

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The Journal of china Universities of Posts and Telecommunications 2010年第2期17卷 63-66页

作者： WANG Bin-huo,ZHAO Xiao-hui ,MO Xiu-ling Key Laboratory of Information Science,School of Communication Engineering,jilin university,changchun 130012,china [a] Key Laboratory of Information Science School of Communication Engineering Jilin University Changchun 130012 China

A joint rake and minimum bit-error rate （MBER） equalizer receiver for direct-sequence ultra-wideband （DS-UWB） communication systems is proposed, where the receiver combats against inter-symbol interference （ISI） by utilizing the rake and equalization techniques. Theoretical analysis and simulation results of the proposed receiver performance are given. Monte Carlo simulations show that the performance of this receiver outperforms rake-MMSE-equalizer receiver and it will degrade with the increase of data speed and the decrease of rake fingers.

关键词： performance analysis equalization DS-UWB rake-MBER