GPRS网络建设方案及设计

首先对GRPS系统基本结构进行了简单介绍。其次,根据广东汕头GPRS网络建设工程,详细说明了GPRS网络的设计方案。详细阐述了汕头GPRS网络连接方案、数据配置以及对现有网络的升级方案。最后对GRPS网络建设方案进行了总结。     

基于中间件的传统CAD软件协同设计与实现

提出了一个使用代理和中间件技术实现在线集成透明CAD软件的混合方法。该方法使用内外封装器对传统的CAD软件进行封装实现协同操作,以中性接口为不同CAD软件提供统一的调用接口。协同绘图作为实例说明了设计方法的有效性。     

Pseudo-Noise Code Shifting Signal for AI Arranged UAV Networking

Mobile Networks and Applications - Communication problems standout as the key issue needing to be addressed in Unmanned Aerial Vehicle (UAV) applications. Nowadays, the application of Artificial...     

广电企业业务流程的分析和优化

介绍了广电网络业务流程的整体结构,对目前广电业务流程的评价指标体系进行了分析,提出了以流程时间、流程速率、工作队列等组成广电网络业务流程的实例--业务流程的评价指标,以及基于Little法则的广电网络业务流程评价指标体系曲简化方法.研究了采用时间Petri网建模对企业业务流程分析的方法和分析优化步骤,并针对广电网络业务流程的具体业务流程给出的实际案例进行了分析.     

The hybrid extended Born approximation and CG-FFT method forelectromagnetic induction problems

The authors propose the hybridization of the extended Born approximation (EBA) with the conjugate-gradient fast Fourier transform (CG-FFT) method to improve the efficiency of numerical solution of electromagnetic induction problems. This combination improves the solution efficiency in two ways. First, using the FFT in the extended Born approximation decreases the computational cost of the conventional EBA method from O(N²) to O(N log₂ N) arithmetic operations, where N is the number of unknowns in the problem. This approach, referred to as the FFT-EBA method, applies to problems with a fairly large contrast. Secondly, using the EBA as a partial preconditioner for the CG-FFT method increases the convergence speed of the conventional CG-FFT method. This second approach, referred to as the EBA-CGFFT method, is in principle applicable to all problems with a homogeneous background, but is particularly efficient for problems with a higher contrast. Numerical experiments suggest that the combination of these two methods is more accurate and more efficient for electromagnetic induction problems     

A novel integrated micromachined tunable laser using polysilicon3-D mirror

A prototype tunable laser of ~2 mm×1.5 mm size has been developed for wavelength-division-multiplexing (WDM) application. This device is an integrated micromachined polysilicon three-dimensional (3-D) mirror with a single-mode Fabry-Perot laser diode and an antireflection-coated optical fiber. The micromirror can be driven to move laterally by an electrostatic comb-drive that changes the external cavity length of laser diode enabling wavelength tuning. A wavelength-tunable range of 16 nm is obtained using a driving voltage within ±3 V at a bias voltage of 10 V     

一种降低DMT系统发送信号峰值的非线性映射方法

针对DMT ADSL（DMT线路码非对称数字用户环路）传输系统发送信号幅值尖峰问题。本文提出了一种降低发送信号最大峰值同时又不损失系统 传送信息的非线性映射方法。通过最优化方法合理地设计一组可逆映射器,该方法比目前ADSL系统的硬限幅方法能较大幅度地压缩系统的动态范围或在相同的动态范围下获得更好的传输性能。     

空地巡航导弹模拟训练成绩评估研究

以遥控电视制导巡航导弹为例, 建立了空地巡航导弹对地攻击成绩评估框架体系和成绩评定模型.对其它型号的巡航导弹射击效果评定具有参考价值.     

Adaptive Kernel Function of SVM for Improving Speech/Music Classification of 3GPP2 SMV

Because a wide variety of multimedia services are provided through personal wireless communication devices, the demand for efficient bandwidth utilization becomes stronger. This demand naturally results in the introduction of the variable bitrate speech coding concept. One exemplary work is the selectable mode vocoder (SMV) that supports speech/music classification. However, because it has severe limitations in its classification performance, a couple of works to improve speech/music classification by introducing support vector machines (SVMs) have been proposed. While these approaches significantly improved classification accuracy, they did not consider correlations commonly found in speech and music frames. In this paper, we propose a novel and orthogonal approach to improve the speech/music classification of SMV codec by adaptively tuning SVMs based on interframe correlations. According to the experimental results, the proposed algorithm yields improved results in classifying speech and music within the SMV framework.     

导入六西格玛,有效降低企业劣质成本

本文简单介绍六西格玛管理,重点阐述企业导入六西格玛管理,应对劣质成本.