新一代银行大型机网络接入技术研究

银行大型机网络接入技术的转型是当前一个非常重要的研究与应用课题。文章在成功实现银行大型机网络接入技术转型的基础上,分析了相关新技术,解决了转型中的关键问题,提出并实现了一种稳定高效的银行大型机网络接入技术方案,对银行大型机网络接入技术的转型具有指导意义,对银行信息化技术研究具有重要参考价值。     

Design of a 3780-point IFFT processor for TDS-OFDM

This correspondence presents a design of 3780-point IFFT processor for TDS-OFDM terrestrial DTV transmitter using FPGA. It demonstrates the algorithm design and error analysis of the processor, which can achieve a throughput of 7.56M complex IFFT operations per second. This design meets the signal-to-quantization noise ratio requirement of the TDS-OFDM system. It consists of two FPGA and one dual-port RAM. The data stream pipeline algorithm is implemented     

非晶Sm5Fe74.3Nb1.5Si11.7B4.5C2.5Cu0.5合金经预退火后的晶化动力学的DTA研究

研究了非晶Sm5Fe74.3Nb1.5Si11.7B4.5C2.5Cu0.5合金经400℃，保温10min预退火后的晶化动力学。结果表明；该合金的晶化相为α-Fe固溶体和Sm2Fe17Cx金属间化合物，两相的晶化表观激活能分别为557KJ/mol和514KJ/mol，当晶化体积分数为60%时，α-Fe相的晶化激活能达极大值；Sm2Fe17Cx相晶化激活能则随其晶化体积分数的增加而逐渐减小。     

浅谈中承式钢管拱肋单拱桥的施工方法

右江平圩大桥钢管拱肋的制作、拼装、吊装、混凝土灌注的施工方法及注意事项 ,事故原因分析及处理。     

用变角XPS定量分析研究GaAs光电阴极激活工艺

用变角X射线光电子能谱 (XPS)技术分析了GaAs光电阴极的激活工艺 ,定量计算了阴极表面激活层和界面氧化层的厚度和组成。界面氧化物是由于O原子穿过激活层 ,扩散到GaAs与 (Cs,O)激活层的界面上而形成的。导入过量O会增加O GaAs界面层的厚度 ,而对 (Cs,O)激活层厚度影响较小。在激活过程中 ,严格控制和减少每次导入的O量是减少界面氧化层厚度 ,提高灵敏度的重要途径。在第一步激活后的阴极样品 ,通过较低温度的加热和再激活 ,能获得比第一步高出 30 %的光电灵敏度的原因是较低温度加热减少了界面氧化层的厚度和界面势垒     

新型哈氏合金G—30的耐蚀性能与工业应用

文章叙述了新型镍基耐蚀哈氏合金G-30在不同介质中的耐蚀性能以及工业应用,综合分析了该合金应用的经济性及前景。     

W片二向色性角β测定中的两个问题

本文讨论在测定W片二向色性角β的实验装置中的两个问题:W片的e轴与起偏器P_1透振方向间夹角θ偏离45°时引起的误差;起偏器P_1、检偏器P_2的消光比ρ对测量精度的影响。     

An approximate method for computing performance-related reliability of gracefully degrading systems

Using existing methods, the computation of performance-related reliability (PRR) of large-scale gracefully degrading systems is very tedious and time consuming. In this paper, the behaviour of such systems is respectively modeled as two types of diffusion processes according to their reconfiguration coverage. If the coverage is 1 (i.e. the reconfiguration is always successful), it is modeled as a regular diffusion. If, on the other hand, the coverage is less than one, it is modeled as diffusion with killing. Kolmogorov backward equations for regular diffusion processes and for diffusions with killing are then applied to compute the PRR. The methods have been applied in several examples, and the results satisfactorily agree with the accurate results.     

Development of a numerical comparator for protective relaying: PartII

This paper describes the testing of a new power system numerical relaying concept. The new technique is applied to distance relaying to offer improved reliability and security of the relay, and improve the speed of relay operation. To validate the algorithm's performance, the scheme was analyzed under a variety of test conditions and compared with conventional relay concepts. This paper presents the results of the testing and shows that the new relaying scheme operated with a high level of security and dependability for all of the test cases. The tests show improvements that the new scheme can offer in comparison to the conventional schemes     

A dynamic frequency grid allocation scheme for the efficient designof equiripple FIR filters

In the design of a digital filter, the frequency response is often optimized to meet a given set of specifications on a dense grid of frequency points. The density of the frequency grid points must be sufficiently high so that the frequency response of the filter does not violate the specifications at frequencies in between the grid points. However, the computational complexity of the design process and the storage requirements of the computer increase with the number of frequency grid points. We propose a novel dynamic: grid point allocation technique for the design of minimax optimum FIR filter. It uses a sparse frequency grid but will produce a design that is the same as one designed on very dense frequency grid points. It requires significantly less computer time and memory resources compared with fixed grid point algorithms