摘要：在点集拓扑学、离散数学图论以及复杂网络理论关于连通性研究的基础上，本文借助系统经济学的“资源位”概念，以空间资源位为点权，以时间资源位为边权，为航空网络的连通性研究提供了新的思路。%On the basis of the connectivity research with point set topology, graph theory from discrete mathematics and complex network theory,the article has used“resource-niche” from systems economics to define the space resource-niche as point weight and the time resource-niche as side weight. This work has provided new ideas for the research of aviation network connectivity.
摘要：Nowadays,human society has gone into the information age and the system age at the same time. In this paper,taking a new social media as a field of study and WeChat in full swing as the specific study object,WeChat social system is divided into some subsystems according to Hierarchical theory of system economics, and then discussed the hierarchical relationships between various subsystems. This paper analyzed the mechanism about WeChat social system by Hierarchical Transition Theory and completed hierarchical transition from technical aspect to economic aspect then to management. Eventually,this paper suggested that WeChat would be used in precision marketing and what the future development trends would be.%当今人类社会步入信息时代，同时也是系统时代。本文以社交新媒体为研究领域，以最近如火如荼的微信为具体研究对象，根据系统经济学中的层次结构理论划分微信社交系统，考究各子系统之间层次关系，根据层级过渡思想解析微信社交系统机理，完成由技术、经济到管理层面的过渡，最终得出微信作为社交新媒体工具在精准营销以及未来发展趋势方面的启示。
摘要：Due to impact of natural disasters, economic development, tourism development and other factors,the ancient murals and paintings are endangered. Experts are urgent to carry out protection work to save the damaged relic. How to better protect the damaged frescoes,is based on the full understanding of mural disease. This paper mainly studies the methods of statistical analysis of mural disease. Through a comprehensive analysis from angle of image and the point of view of geometry,evaluating and recording the situation of mural disease,achieving to record and preservation of mural disease information,provide the basis and guarantee for the protection of the mural.%由于受到自然灾害，经济建设，旅游开发等因素的影响，古代壁画及岩画已处于濒危境地，专家们正在紧急的开展保护工作来挽救破损文物，如何更好的保护破损壁画，是要基于对壁画病害的充分了解之下。本文主要研究壁画病害统计分析的方法，通过从几何角度和图像角度进行综合分析，进行壁画病害的评估与记录，实现对壁画病害信息的记录与保存，为壁画的保护工作提供依据和保证。
摘要：基于内容的图像检索技术日益成为了研究热点。而颜色特征是基于内容的图像检索技术常用的特征，本文主要介绍了图像检索系统中常用的颜色空间，典型的颜色特征和提取方法，并对其特点和性能进行来了分析。%Content-based image retrieval technology is becoming a hot research area increasingly. Color feature is the common characteristic of image retrieval technology. This paper mainly discusses the color spaces in image retrieval system and typical color features with their extraction. This paper also analyzes the characteristics and performances of color features.
摘要：以系统经济学作为思维参证框架，对当前中国宏观经济问题提出了三点基本判断：1．如何把蛋糕做大依然是中国经济当前面临的最大问题；2．产业升级具有自身的规律性；3．宏观经济管理应当基于统计规律。%Taking systems economics as a reference framework,three judgements about present macro-economic problems of China have been presented:1 . It is still the most important problem for Chinese economy how to make the cake bigger;2 . The upgrading of industry has its own logic;3 . The managements of macro-economy should based on statistical laws.
摘要：研究由不同阻抗的同轴电缆周期相连组成的同轴光子晶体( coaxial photon crystal,CPC)系统中的反常色散曲线和群速。研究了阻抗的大小,每段同轴线的长度,系统中同轴电缆的节数,和同轴电缆自身的折射率对反常色散曲线和群速的影响；并且得到vg =3.25c的最大群速。最后假定使用具有负介电常数填充物的同轴电缆组成CPC,证明可获得vg =(-5.04c)~(-5.23c)。%Anomalous dispersion and group velocity of coaxial photon crystal ( CPC ) were researched, which compose of coaxial cable with different impedance connected periodically. And it was discussed that the different impedances of coaxial cable, the length of each coaxial cable, the number of the coaxial cable,and the refractive index of coaxial cable exercise an influence on anomalous dispersion curves and group velocity, and the most group velocity vg =3. 25c was obtained. Finally, the coaxial cable with hypothetical negative permittivity was used to form CPC,and it was evidenced that vg =( -5. 04c) ~( -5. 23c) was obtained.
摘要：A stereo video object segmentation algorithm based on background reconstruction and disparity map is proposed, which utilizes the information of background, disparity and edging features to extract moving objects from video sequences. Firstly,the method of background reconstruction based on blocks is used to obtain the background information of video sequences,then the background subtraction algorithm is adopted to get the initial segmentation results of moving objects. Secondly,the stereo matching is used to get the disparity map which will then be used to modify the initial segmentation results. Finally,the edging information and mathematic morphology post -processing are applied to get the accurate video object. Experimental results demonstrate that the proposed algorithm can successfully extract moving objects from stereo video sequences whose background have other moving objects.%提出了一种基于背景重建和视差图的立体视频分割算法，利用背景、视差和边缘等信息进行运动对象分割。该算法首先采用基于块的背景重建方法获取视频序列的背景信息，再利用背景相减法获得运动对象的初步分割结果，然后利用立体匹配获得的视差图对初步分割结果进行修正，最后利用边缘信息和后处理操作获得最终的立体视频运动对象。实验表明，该算法能够有效地从运动背景中将视频运动对象完整地提取出来。
摘要：在加性高斯白噪声信道和瑞利信道中,比特交织编码调制迭代译码( bit-interleaved coded modulation with iterative decoding ,BICM-ID)技术具有良好的误码率性能,但它的迭代过程增加了计算复杂度和接收端的译码时延。目前,已经提出了各种停止准则来减少不必要的迭代计算。在交叉熵停止准则的基础上,本文提出了一种简化的交叉熵停止准则。该准则对于不同的信噪比( SNR)设置了一个自适应门限来决定在译码器的接收端是否继续计算交叉熵。简化的交叉熵停止准则与传统的交叉熵停止准则相比,具有更低的计算复杂度,并且对于判断是否到达译码地板值有更高的灵敏度,从而在一定程度上提高了BICM-ID系统的性能。仿真结果显示,与传统的交叉熵停止准则相比,简化的交叉熵停止准则的平均迭代次数减少了约12.2%。当SNR处于2.75dB至3.35dB时,其性能要优于传统的交叉熵停止准则。%The iterative process of bit -interleaved coded modulation iterative decoding ( BICM -ID ) leads to the increase of computational complexity and decoding delay at the receiver, although it owns remarkable bit-error-rate(BER)performance both in additive Gaussian noise (AWGN)channel and Rayleigh fading channel. A variety of the stopping criteria are put forward to reduce the unnecessary iterations in the process. This paper presents a simplified cross-entropy ( CE) stopping criterion based on CE criterion,which sets self-adaptive thresholds for different SNRs to decide whether to calculate the CE in the receiver. Compared with the conventional CE criterion, the simplified CE criterion can obtain a lower computational complexity. And it is more sensitive about estimating if the iterative decoding process achieves the error platform,which improves the performance of BICM-ID. Simulation results show that the iterative number of the simplified CE criterion is about 12 . 2% less than the conventional CE criterion and with a little better performance than CE criterion when the SNR is from 2. 75 dB to 3. 35dB.
摘要：The current application in the field of international and domestic media economics research more analytical frameworks are microeconomics and industrial economics research system based on the new classical economics theory,and media exclusive to some special problems in the field of economy and product features make the theory of new classical economics the kernel and basic hypothesis challenges, and that's what media economic research one of the focus of the most controversial issues. Applying system economics,the framework of industrial organization of China's media industry is carried on the preliminary discussion in this paper,mainly on theoretical research with the empirical.%当前在国际和国内传媒经济学研究领域应用较多的分析框架均为基于新古典经济学理论基础之上的微观经济学和产业经济学的研究体系，而传媒经济领域的一些独有的特殊问题和产品特性，使得新古典经济学的理论内核和基本假设面临挑战，这也正是传媒经济研究领域争议最大的焦点问题之一。本文应用系统经济学的分析框架对中国传媒产业的产业组织问题进行了初步探讨，以理论研究为主，佐以实证。
摘要：The Bessel beams have very singular properties. For example,the motion of Bessel beam is a non - diffracting beam, and the experimental measurements showed that Bessel beams have a group velocity greater than the light speed . A simple explanation for the superluminal motion is given by the interference of spherical wave fronts on the symmetry axis. And in 2006 the researchers show that, in contrary to the ordinary Bessel waves of real argument, the group velocities of imaginary argument modified Bessel waves are superluminal.%Bessel波束具有奇异的特性，例如在传播中不发生衍射，而且实验测量证明其群速比光速c要大。对其超光速运动可以用球面波前在对称轴上的干涉作简单解释。2006年有研究人员指出，不仅通常的实宗量Bessel波，虚宗量修正Bessel波也有群速超光速现象。
摘要：LDPC codes is an error -correcting code with extremely excellent performance, owns to its highly effective decoding algorithm. Also,its decoding is simple,feasible and parallel. It is convenient for hardware implementation. The research on LDPC codes becomes one of the hot spots in channel transmitting field. This article based on the existing theoretical research of LDPC codes, expounds the derived process of LLR-SPA decoding algorithm,and through simulation experiments,gain the bit error rate curve of LLR-SPA based on CMMB standard.%在对LDPC码现有理论研究基础上，阐述了LLR-SPA译码算法的推导，并通过仿真实验，得到了CMMB标准下LLR-SPA译码算法的误码率曲线图。
摘要：基于节点的有限元方法具有网格剖分、构造高阶基函数容易的优点。由于在节点上定义场量，节点有限元更适用于多物理问题。但节点有限元方法直接求解电磁场会出现伪解，场量在不均匀介质中不连续等问题。基于节点的A-ϕ方法可以有效避免传统节点有限元方法存在的问题。本文研究A-ϕ方法的工程应用，研究开域和闭域问题中如何设置关于矢势和标势函数的边界条件，特别是波导问题和理想导体球的散射问题，讨论了端口边界条件，辐射边界条件的使用方法。对于理想导体边界条件采用了阻抗边界条件，与端口条件配合，克服方程的奇异性。数值实验比较分析了A-ϕ法节点有限元和棱边法有限元的计算结果，验证了A-ϕ法节点有限元的正确性和有效性。%The advantages of the nodal -based finite element method are convenient for mesh partition and high order basis functions construction. As field quantities defined on nodes,the nodal-based finite element method is more suitable for multi -physics problems. However, the nodal element for solving electromagnetic fields directly will appear spurious solutions and fields discontinuities in inhomogeneous media. Nodal-based A-ϕmethod can effectively avoid problems caused by the traditional nodal-based finite element method. This paper focuses on A-ϕmethod for engineering applications,which researches the boundary conditions setting of the vector potential and scalar potential function s in open and closed domains. Especially, for the waveguide problem and the EM wave scattering problem of perfectly conducting sphere,the applications of the port boundary condition and radiation boundary condition are discussed. The perfectly conducting boundary conditionis are dealt with impedance boundary condition accompanied with port conditions to overcome the singularity of the equations. In numerical experiments, the results obtained by the nodal element method are compared with the results of the edge element method,verifying the validity and effectiveness of the A-ϕ nodal finite element method.
摘要：本文介绍了基于Flash平台的流媒体系统中使用的RTMP协议的原理和应用。首先，对网络上流媒体的各种传输方式的优缺点进行了分析。然后，重点分析了基于RTMP协议的流媒体技术的特点，并且介绍了RTMP协议报文的格式。最后，实现了一个基于RTMP协议的流媒体直播系统。%This paper studies the RTMP in Flash streaming media system. First of all,it analysis the ad-vantages and disadvantages of various type of transmission methods on network. Then,it makes a detailed analysis of characteristics of streaming media system based on RTMP,and introduced the format of RT-MP. Finally,it implements a live streaming media system based on RTMP.
摘要：当前，传媒产权制度的改革是我国传媒业体制创新的关键突破口。本文以系统经济学及其产权理论为主要理论工具，以系统化的视角全面地剖析了当前我国传媒产权制度的现状及存在的问题，并提出了我国传媒产权制度变革的思路：即构建多层次的传媒产权结构、促进不同层次传媒产权之间的资源位流动，以及发挥传媒主体自组织制度变迁和政府层级型制度变迁的共同作用，推进我国传媒产权制度变革的进程。%At present,institutional reform of media property-right is the key breakthrough point of institu-tional innovation of China's media industry. With system economics and its property right theory as the main theory tool,this thesis conducts comprehensive,objective and vivid analysis of the current condition and problems for China's media property right institution from a systematic perspective,and puts forward the ideas for institutional reform of media property right:1 . Establish multi -level media property right structure;2 . Promote flow of resource -niche between media property right at different levels to realize maximum efficiency of media resource allocation;3 . Give into play common roles of evolution of self-or-ganizing institutions of media subjects and evolution of hierarchical institution of the government so as to promote the process of institutional reform of China's media property right.
摘要：1905年Einstein说“超光速没有存在的可能”，他的理念其实只是假设或猜测。自从1962~1967年以来，超光速研究在多国(如美国、德国、意大利、中国)广泛开展。本文论述1963~2013年间超光速研究的成就和问题，其理论和实验是用经典物理或量子物理方法实施的。基于波粒二象性，科学家按照两条路线(粒子、电磁波)而展开研究。新学科“超光速物理学”的建立已成事实，其研究成果所展现的生动和丰富令人惊讶。%In 1905,Einstein said “velocities greater than that of light have no possibility of existence.”But this idea only may be hypothesized or guessed.Since the early work in year 1962~1967,the research on faster-than-light( superluminality) has been performed in several nations,such as in USA,Germany, Italy and China. In this paper,we discuss the achievements and problems of faster-than-light research in year 1963~2013 , the methods of theoretical study and experiments are classical physics or quantum physics.Base on the particle-wave duality,the scientists worked along the road of the particles or the e-lectromagnetic waves.Then,the newly subject of“Superluminal Light Physics” is an established fact.It is surprising that the research results present vivid and rich.
摘要：外部性产生的必要条件是相关各方属于同一个系统。因此，有多少种系统化的方式就有多少种外部性。从宏观上讲，可以把外部性划分为以下三种：生态外部性、经济外部性和社会外部性。处理外部性的根本方法就是系统解耦。%The necessary condition generating externality is that all related parties belong to one system.Therefore,the classification of systems correspond to that of externalities.Macroscopically speak-ing,the externalities can be divided into the following three types:ecological externality,economic exter-nality and social externality.The fundamental method for dealing with externality is discouplling of sys-tems.
