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Generalized dromion solutions of a new higher dimensional soliton equation

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Communications in Nonlinear Science and Numerical Simulation 2001年第2期6卷 97-101页

作者： Jiefang ZHANG and Gongdi XU Shanghai Institute of Applied mathematics and Mechanics, Shanghai 200072, china Institute of Nonlinear physics, zhejiang normal university, jinhua 321004, china college of Chemical engineering, Qiqihar university, Qiqihar 161 Shanghai Institute of Applied mathematics and Mechanics Shanghai 200072 China Institute of Nonlinear physics Zhejiang Normal University Jinhua 321004 China college of Chemical engineering Qiqihar University Qiqihar161000 China

We derive the generalized dromions of the new higher dimensional soliton equation by suitably utilizing the arbitrary function present in the bilinearized linear equations. The rich dromion structures for this system ... 详细信息

关键词： dromion soliton equation

Some Properties of Aut*（X） and the Subgroup AutΣ（X）

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Communications in Mathematical Research 2009年第2期 97-103页

作者： Qian You-hua and Chen Sheng-min (college of mathematics,physics and information engineering,zhejiang normal university,jinhua,zhejiang,321004)

Let Aut*(X) denote the group of homotopy classes of self-homotopy equivalences of X, which induce identity automorphisms of homology group. We describe a decomposition of Aut*(X1∨…∨Xn) as a product of its simpler subgroups. We consider the subgroup AutΣ (X) of all self homotopy classes α of X such that Σα = 1ΣX : ΣX→ΣX, and also give some properties of AutΣ (X).

关键词： self-homotopy equivalences the wedge space reducible

A Review on the Application of Deep Learning Methods in Detection and Identification of Rice Diseases and Pests

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Computers, Materials & Continua 2024年第1期78卷 197-225页

作者： Xiaozhong Yu jinhua Zheng college of Computer Science and Technology Hengyang Normal UniversityHengyang421002China Hunan Provincial Key Laboratory of Intelligent information Processing and Application Hengyang Normal UniversityHengyang421002China

In rice production,the prevention and management of pests and diseases have always received special *** methods require human experts,which is costly and *** to the complexity of the structure of rice diseases and pests,quickly and reliably recognizing and locating them is ***,deep learning technology has been employed to detect and identify rice diseases and *** paper introduces common publicly available datasets;summarizes the applications on rice diseases and pests from the aspects of image recognition,object detection,image segmentation,attention mechanism,and few-shot learning methods according to the network structure differences;and compares the performances of existing ***,the current issues and challenges are explored fromthe perspective of data acquisition,data processing,and application,providing possible solutions and *** study aims to review various DL models and provide improved insight into DL techniques and their cutting-edge progress in the prevention and management of rice diseases and pests.

关键词： Deep learning rice diseases and pests image recognition object detection

Quantum secret sharing between m-party and n-party with six states

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Science china(physics,Mechanics & Astronomy) 2009年第8期52卷 1191-1202页

作者： GAO Ting1,YAN FengLi2,3 & LI YouCheng2,3 1 college of mathematics and information Science,Hebei normal university,Shijiazhuang 050016,china 2.college of physics and information engineering,Hebei normal university,Shijiazhuang 050016,china 3 Hebei Advanced Thin Films Laboratory,Shijiazhuang 050016,china college of mathematics and information Science Hebei Normal University Shijiazhuang China college of physics and information engineering Hebei Normal University Shijiazhuang China Hebei Advanced Thin Films Laboratory Shijiazhuang China

A quantum secret sharing scheme between an m-party group and an n-party group is proposed using three conjugate bases.A sequence of single photons,each of which is prepared in one of the six states,is used directly to encode classical information in the quantum secret sharing *** this scheme,each of all m members in group 1 chooses randomly his/her own secret key individually and independently,and directly encodes his/her respective secret information on the states of single photons via unitary operations,then the last one sends 1/n of the resulting qubits to each member of group *** measuring their respective qubits,all members in group 2 share the secret information shared by all members in group *** renders impossible a Trojan horse attack with a multi-photon signal,a fake-signal attack with EPR pairs,an attack with single photons,and an attack with invisible *** give the upper bounds on the average success probabilities for dishonest agent eavesdropping encryption using the fake-signal attack with any two-particle entangled states.

关键词： quantum secret sharing security EPR pairs

Short cycle structures for graphs on surfaces and an open problem of Mohar and Thomassen

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Science china mathematics 2006年第2期49卷 212-224页

作者： REN Han & DENG Mo Department of mathematics, East china normal university, Shanghai 200062, china college of mathematics & information Science, Northwest normal university, Lanzhou 730070, china Department of mathematics East China Normal University Shanghai China college of mathematics & information Science Northwest Normal University Lanzhou China

In this paper we investigate cycle base structures of a (weighted) graph and show that much information of short cycles is contained in an MCB (i.e., minimum cycle base). After setting up a Hall type theorem for base-transformation, we give a sufficient and necessary condition for a cycle base to be an MCB. Furthermore, we show that the structure of MCB in a (weighted)graph is unique. The property is also true for those having a longest length (although much work has been down in evaluating MCB, little is known for those having a longest length). We use those methods to find out some unknown properties for short cycles sharing particular properties in (unweighted) graphs. As applications, we determine the structures of short cycles in an embedded graph and show that there exist polynomially bounded algorithms in finding a shortest contractible cycle and a shortest two-sided cycle provided such cycles exist. Those answer an open problem of B. Mohar and C. Thomassen.

关键词： cycle base facial cycle graph embedding.

Stochastic bi-resonance induced by external noise for Ca^2+ signaling in hepatocytes

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Science china Chemistry 2005年第4期48卷 286-291页

作者： ZHANG Jiqian1,2,HOU Zhonghuai1 & XIN Houwen1 1.Department of Chemical physics,university of Science and Technology of china,Hefei 230026,china 2.college of physics and Electronic information,Anhui normal university,Wuhu 241000,china Department of Chemical physics University of Science and Technology of China Hefei China college of physics and Electronic information Anhui Normal University Wuhu China

The influence of external noise on intracellular Ca2+ oscillations dynamics in a single cell of rat hepatocytes is *** coherence of noise-induced intracellular Ca2+ oscillations reached two maxima for multiple external noise intensity,indicating the occurrence of external noise stochastic bi-resonance (SBR).This phenomenon is compared with our previous result that was induced by internal ***,the deterministic bifurcation character of the system was also discussed.

关键词： stochastic bi-resonance, environment fluctuation, calcium oscillations.

Image space analysis for variational inequalities with cone constraints and applications to traffic equilibria

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Science china mathematics 2012年第4期55卷 851-868页

作者： LI Jun 1,& HUANG NanJing 2 1 college of mathematics and information,china West normal university,Nanchong 637009,china 2 Department of mathematics,Sichuan university,Chengdu 610064,china college of mathematics and information China West Normal University Nanchong China Department of mathematics Sichuan University Chengdu China

In this paper,the image space analysis (for short,ISA) is employed to investigate variational in- equalities (for short,VI) with cone *** separation for VI with cone constraints is characterized by using the normal cone to a regularization of the image,and saddle points of the generalized Lagrangian func- ***-type necessary and sufficient optimality conditions for VI with cone constraints are presented by using a separation *** functions and weak sharpness for VI with cone constraints are also investi- ***,the obtained results are applied to standard and time-dependent traffic equilibria introduced by Daniele,Maugeri and Oettli.

关键词： variational inequality image space analysis linear separation necessary and sufficient optimalitycondition traffic equilibrium

First photometric study of the eclipsing binary PS Persei

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Research in Astronomy and Astrophysics 2011年第2期11卷 191-197页

作者： Jin-Zhao Yuan physics and information engineering Institute,Shanxi normal university,Linfen 041004,china physics and information engineering Institute Shanxi Normal University Linfen 041004 China

CCD photometric observations of the eclipsing binary PS Persei （PS Per） were obtained on two consecutive days in *** 2003 version of the WilsonDevinney code was used to analyze the first complete light curves in the V and R *** is found that PS Per is a short-period Algol-type binary with the less massive component completely filling its inner critical Roche *** mass ratio of q=0.518 and the orbital inclination of i=89.86° are *** addition,based on all available times of primary light minima,including two new ones,the orbital period has been improved.

关键词： stars: binaries: close -- stars: binaries: eclipsing -- stars: individual:PS Per

D(β)-vertex-distinguishing total coloring of graphs

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Science china mathematics 2006年第10期49卷 1430-1440页

作者： ZHANG Zhongfu,LI Jingwen,CHEN Xiang’en,YAO Bing, WANG Wenjie & QIU Pengxiang Institute of Applied Mathematic, Lanzhou Jiaotong university, Lanzhou 730070, china college of mathematics and information Science, Northwest normal university, Lanzhou 730070, china college of information and Electrical engineering, Lanzhou Jiaotong university, Lanzhou 730070, china Institute of Applied Mathematic Lanzhou Jiaotong University Lanzhou China college of mathematics and information Science Northwest Normal University Lanzhou China college of information and Electrical engineering Lanzhou Jiaotong University Lanzhou China

A new concept of the D(β)-vertex-distinguishing total coloring of graphs, i.e., the proper total coloring such that any two vertices whose distance is not larger than β have different color sets, where the color set of a vertex is the set composed of all colors of the vertex and the edges incident to it, is proposed in this paper. The D(2)-vertex-distinguishing total colorings of some special graphs are discussed, meanwhile, a conjecture and an open problem are presented.

关键词： graph, total coloring, D(β)-vertex-distinguishing total coloring, D(β)-vertexdistinguishing total chromatic number.