查看更多>>摘要：As we know,a complex P is projective if and only if P is exact with Zn(P)projective in R-Mod for each n∈ Z and any morphismf:P→C is null homotopic for any complex C.In this article,we study the notion of DG-Gorenstein projective com-plexes.We show that a complex G is DG-Gorenstein projective if and only if G is exact with Zn(G)Gorenstein projective in R-Mod for each n∈ Z and any morphism f:G→Q is null homo-topic whenever Q is a DG-projective complex.
查看更多>>摘要：In this paper,we study the displacement rank of the Core-EP inverse.Both Sylvester displacement and generalized displacement are discussed.We present upper bounds for the ranks of the displacements of the Core-EP inverse.Numerical experi ments are presented to demonstrate the effiiciency and accuracy.
查看更多>>摘要：This paper presents the contour integral method for solving the linear constant coefficient ordinary differential equa-tions in complex plane,and obtains the uniform expressions of the general solutions.Firstly,by using Residue Theorem,the general form of the contour integral representation for the homogeneous complex differential equation is obtained,which can be degener-ated to classical results in real line.As for inhomogeneous com-plex differential equations with constant coefficients,we construct the integral expression of the particular solution for any continu-ous forcing term,and give rigorous proof via Residue Theorem.Thus the general solutions of inhomogeneous complex differential equations are also given.The main purpose of this paper is to give a foundation for a complete theory of linear complex differential equations with constant coefficients by a contour integral method.The results can not only solve the inhomogeneous complex dif-ferential equation well,but also explain the forms that are difficult to be understood in the classical solutions.
查看更多>>摘要：This paper explores P-type learning laws for impulsive nonlinear fractional differential systems.In order to prove the convergence of the system in P-type learning laws,we refer to the various properties of fractional systems and inequality.The suffi-cient conditions of iterative learning control is established.Finally,we give an example to illustrate theoretical results.
查看更多>>摘要：In this paper,we propose and analyze a full-Newton step feasible interior-point algorithm for semidefinite optimization based on a kernel function with linear growth term.The kernel function is used both for determining the search directions and for measuring the distance between the given iterate and the μ-cen-ter for the algorithm.By developing a new norm-based proximity measure and some technical results,we derive the iteration bound that coincides with the currently best known iteration bound for the algorithm with small-update method.In our knowledge,this result is the first instance of full-Newton step feasible inte-rior-point method for SDO which involving the kernel function.
查看更多>>摘要：The multiple attribute group decision making problem in which the input arguments take the form of intuitionistic uncer-tain linguistic information is studied in the paper.Based on the operational principles of intuitionistic uncertain linguistic vari-ables and the concept of the expected value and accuracy function,some new dependent aggregation operators with intuitionistic uncertain linguistic information including the dependent intuition-istic uncertain linguistic ordered weighted average(DIULOWA)operator,the dependent intuitionistic uncertain linguistic ordered weighted geometric(DIULOWG)operator,the generalized de-pendent intuitionistic uncertain linguistic ordered weighted aggre-gation(GDIULOWA)operator and so on are developed,in which the associated weights only depend on the aggregated arguments.Also,we study some desirable properties of the aggregation op-erators.Moreover,the approach of multiple attribute group deci-sion making with intuitionistic uncertain linguistic information based on the developed operators is proposed.Finally,an illustra-tive numerical example is given to show the practicality and effec-tiveness of the proposed approaches.
查看更多>>摘要：Based on elliptic curve public key cryptosystem and with the help of ring signature,a traceable and anonymous authen-tication scheme is proposed.The security of the proposed scheme is based on the difficulty of solving elliptic curve discrete loga-rithm problem(ECDLP)and the computational Diffie-Hellman assumption(CDHA).In order to prevent random tracing,the threshold technology is introduced into anonymous tracing.In addition,in the signature generation process,using the private key and the additional random number,the signature satisfies un-forgeability.Compared with the existing schemes,the communi-cation overhead of the proposed scheme is relatively small.In the case of similar calculational overhead,the proposed scheme not only has anonymous authentication,signature unforgeability,but also has threshold traceability.
查看更多>>摘要：Remote data auditing becomes critical to ensure the storage reliability in distributed cloud storage.Recently,Le et al proposed an efficient private data auditing scheme NC-Audit de-signed for regenerating codes,which claimed that NC-Audit can effectively realize privacy-preserving data auditing for distributed storage systems.However,our analysis shows that NC-Audit is not secure for that the adversarial cloud can forge some illegal blocks to cheat the auditor successfully with a high probability even without storing the user's whole data,when the coding field is large enough.
查看更多>>摘要：The inventory counting of silver ingots plays a key role in silver futures.However,the manual inventory counting is time-consuming and labor-intensive.Furthermore,the silver ingots are stored in warehouses with harsh lighting conditions,which makes the automatic inventory counting difficult.To meet the challenge,we propose an automatic inventory counting method integrating object detection and text recognition under harsh lighting conditions.With the help of our own dataset,the barcode on each silver ingot is detected and cropped by the feature pyra-mid network(FPN).The cropped image is normalized and cor-rected for text recognition.We use the PSENet+CRNN(Progres-sive Scale Expansion Network,Convolutional Recurrent Neural Network)for text detection and recognition to obtain the serial number of the silver ingot image.Experimental results show that the proposed automatic inventory counting method achieves good results since the accuracy of the proposed object detection and text recognition under harsh lighting conditions is near 99％.
查看更多>>摘要：Path planning of amphibious vehicles on military to-pographic maps is a hot research topic in the field of amphibious tactical training simulation.According to the dynamic characteris-tics and maneuvering destination requirements of amphibious vehicles,a three-dimensional simulation model of amphibious vehicles is designed,and a straight-line driving and steering dy-namic model is constructed.The optimal maneuvering destination and constraint conditions under the condition of unconnected graph are put forward,and the problems of simulation and ma-neuvering path planning of amphibious vehicles on unconnected graph are solved by the theory of region partition and shortest path of graph.Compared with Dijkstra algorithm and heuristic algo-rithm A*,the experimental results show that the algorithm de-signed in this paper has superior applicability and time performance
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