山西联通和网通签订短信互联协议

2004年12月28日，中国联通山西分公司与中国网通集团山两省通信公司签订了《网间点对点短消息互联及结算协议》和《网间互联及结算协议》，对双方网间互联互通及结算方式重新进行了规范，同时就网间点对点短信业务的互联及结算事宜达成共识，并签订协议。     

新形势下电信网间互联互通工作的探讨

分析网间互联互通对电信业整体发展的重要性 ,提出电信运营企业高度重视是做好网间互联互通工作的前提 ,加强监管是做好网间互联互通的关键。介绍了网间互联互通的主要指标和规范 ,探讨了建立网间关口局和互联互通检测系统的必要性。     

关于点对点短消息网间互通协议要求的介绍

介绍了包括协议的功能概述、通信方式、消息定义等方面点对点短消息网间互通协议要 求,结合实际运营情况对一些关键字段进行详细解释和分析。     

新形势下电信网间互联互通工作的探讨

分析网间互联互通对电信业整体发展的重要性，提出电信运营企业高度重视是做好风间互联互通工作的前提，加强监管是做好网间互联互通的关键。介绍了网间互联互通的主要指标和规范，探讨了建立网间关口局和互联互通检测系统的必要性。     

江苏省网间结算及互联互通监测系统的建设

介绍了江苏省网间结算与互联互通监测系统的功能定位、建设方案，对如何利用监测系统来监测网间互联互通中几种常见问题进行了分析。网间结算及互联互通监测系统的建设对改善我国电信服务环境和服务质量有非常重要的意义，具有良好的社会效益。     

七号信令监测系统体系结构在网间互联的应用

随着我国电信行业的快速发展和电信体制改革的进一步深入,如何更好地监控运营商间的互联互通质量,提高整个电信行业的服务质量与运行维护水平,提高电话接通率,监控网间某些异常的呼叫等,成为电信监管部门迫切需要解决的问题.就七号信令监测系统的体系结构作了介绍并介绍了它在网间互联互通中,在网间话务分析等6个方面的应用,有助于提高全网接通率,增加业务收入,降低营运成本,提高网络稳定性,有效地对网间互联互通质量进行监控.     

浅析互联互通及网间结算系统监测方案

为了有效实现对各电信运营企业关口局间互联互通情况和通信质量的实时监测,增强各省通信管理局调查取证的能力,保护各电信运营企业以及普通电信用户的合法权益,我国已全面建设互联互通及网间结算监测系统,文章结合铁通辽宁分公司网间监测系统的实际情况,介绍了辽宁铁通互联互通及网间结算监测系统的组网情况、技术性能、与其他运营商关口局的连接方式、网间中继电路接口形式、信令方式等。     

增强网间互联合作 推进有序竞争

分析了我国网间互联互通的现状及所存在问题的实质,对如何实现互联互通的公平竞争, 改善网间通信质量提出了若干建议。     

固定通信网接口局建设的探讨

本文介绍了网间互联互通现状和建设固定通信网接口局的必要性，根据网间互联互通的基本原则，探讨了固定网侧接口局建设方案。     

网间结算与互联互通监测系统的建设与应用

网间结算与互联互通监测系统是电信监管部门实时动态跟踪公用电信网的运行情况和解决网间互联互通问题的有效工具。对网间结算与互联互通监测系统的构成和作用进行了讨论，提出了建设该系统应注意的问题，介绍了该系统监测网间通信质量的方式。     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

Design and experimental study of compensation fitting on the angle-tuned filters

For a 100 GHz DWDM angle-tuned filter with low polarization dependent loss, the insertion loss and the Gaussian- transformation tendency of the transmission spectrum will become more serious as the incident angle is increased. It is because of that the optical path and the transmission modes of the thin film filter will change when the incident angle is varied. According to the thin film matrix theory, the analysis model is established, the displacement change of the transmis- sion field is simulated, and a dynamic compensation fitting is also designed and fabricated in the paper. The experimental results show that it can effectively reduce the insertion loss and the phenomenon of Gaussian process. Using the compen- sation fitting, the tunable range of the filter is at about 20 nm which coincides with the theoretical design.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Complete approach to automatic identification and subpixel center location for ellipse feature

To meet the need of automatic image features extraction with high precision in visual inspection, a complete approach to automatic identification and sub-pixel center location for similar-ellipse feature is proposed. In the method, the feature area is identified automatically based on the edge attribute, and the sub-pixel center location is accomplished with the leastsquare algorithm. It shows that the method is valid, practical, and has high precision by experiment. Meanwhile this method can meet the need of instrumentation of visual inspection because of easy realization and without man-machine interaction.     

Numerical simulation of the inhomogeneous barrier height of an Au/n-InP Schottky diodeKamel Zeghdar1, Lakhdar Dehimi1, 2, Achour Saadoune1, Nouredine Sengouga1,*

We report the current-voltage(I-V) characteristics of the Schottky diode(Au/n-InP) as a function of temperature. The SILVACO-TCAD numerical simulator is used to calculate the I-V characteristic in the temperature range of 280-400 K. This is to study the effect of temperature on the I-V curves and assess the main parameters that characterize the Schottky diode such as the ideality factor, the height of the barrier and the series resistance. The I-V characteristics are analyzed on the basis of standard thermionic emission(TE) theory and the inhomogeneous barrier heights(BHs) assuming a Gaussian distribution. It is shown that the ideality factor decreases while the barrier height increases with increasing temperature, on the basis of TE theory. Furthermore, the homogeneous BH value of approximately 0.524 eV for the device has been obtained from the linear relationship between the temperature-dependent experimentally effective BHs and ideality factors. The modified Richardson plot, according to the inhomogeneity of the BHs, has a good linearity over the temperature range. The evaluated Richardson constant A^* was 10.32 A·cm^-2·K^-2, which is close to the theoretical value of 9.4 A·cm^-2·K^-2 for n-InP. The temperature dependence of the I-V characteristics of the Au/n-InP Schottky diode have been successfully explained on the basis of the thermionic emission(TE) mechanism with a Gaussian distribution of the Schottky barrier heights(SBHs). Simulated I-V characteristics are in good agreement with the measurements[Korucu D, Mammadov T S. J Optoelectronics Advanced Materials, 2012, 14:41]. The barrier height obtained using Gaussian Schottky barrier distribution is 0.52 eV, which is about half the band gap of InP.     

Computing the polyadic decomposition of nonnegative third order tensors

Computing the minimal polyadic decomposition (also often referred to as canonical decomposition or sometimes Parafac) amounts to finding the global minimum of a coercive polynomial in many variables. In the case of arrays with nonnegative entries, the low-rank approximation problem is well posed. In addition, due to the large dimension of the problem, the decomposition can be rather efficiently calculated with the help of preconditioned nonlinear conjugate gradient algorithms, as subsequently shown, if equipped with an algebraic calculation of the globally optimal stepsize in low dimension. Other algorithms are also studied (gradient and quasi-Newton approaches) for comparisons. Two versions of each algorithm are considered: the enhanced line search version (ELS), and the backtracking version alternating with ELS. Computer simulations are provided and demonstrate the good behavior of these algorithms dedicated to nonnegative arrays, compared to others put forward in the literature. Finally, applications in the context of data analysis illustrate various algorithms. The main advantage of the suggested approach is to explicitly take into account the nonnegative nature of the loading matrices in the problem parameterization, instead of enforcing positive entries by projection. According to the experiments we have run, such an approach also happens to be more robust with respect to possible modeling errors.     

Python垃圾收集器原理研究及应用

Python语言的主要设计目标是简洁,内存管理这类复杂工作自然不需要用户关心.在Python世界中,一切皆对象,每个对象都需要占用一定的内存空间.但使用Python的程序员不需要关心对象的内存分配和释放,这些工作都由Python解释器负责.这种自动管理内存的机制就是垃圾收集,它是一种自动回收内存资源的技术.早在20世纪50年代垃圾收集技术就已经在Lisp语言中实现了.GC变得耳熟能详得归功于Java.随着Java语言的成功,垃圾收集也成了每个程序员都熟悉的术语.本文的主要目的是简单介绍一下Python虚拟机中垃圾收集机制的实现原理,从而使每个Python程序员对Python所提供的特性有更深入的理解.     

小信号多腔速调管主要性能指标简化分析

介绍了速调管在我国的发展现状和小信号条件下速调管的各种主要性能指标的简化分析方法。在这种简化分析方法中,首先不考虑非线性和相对论效应等带来的影响,并把多腔速调管看作是几个双腔速调管的级联,得出了增益、效率、带宽和输出功率等重要参数的计算公式。然后通过给出部分参数的修正系数说明了这种简化分析方法的实用价值及理论指导意义。     

小角度扩展相关性近似算法分析

本论文提出一种在多天线MIMO信道相关性建模中小角度扩展近似理论算法,并应用于分析MIMO系统性能。分析中分别对三种不同角能量分布情况下的空间相关性研发快速近似计算法,并同时提出双模(Bi-Modal)角能量分布情况下的近似运算。通过分析这些新方法的近似效率,可以得到计算简单、复杂度低、而且符合实际的MIMO相关信道矩阵,对系统级的快速高效计算法的研究和系统级的评估以及误差分析具有重要的意义。     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.