地震数据通用压缩文件格式设计

本文从生产实际需要提出了进行地震数据压缩和制定规范的压缩数据文件格式的要求，按照通用性，兼容性，可扩充性，操作简便，高缩效率几方面的要求设计了通用压缩数据文件格式及一种具体形式，讨论了数据压缩的具体策略和方法，试验表明，采用压缩数据文件格式，不但可以大比例地减小数据存贮空间（压缩比达４：１－１０：１），而且可以大大加快数据的Ｉ／Ｏ速度（提高１倍以上）。     

DIGITAL PROCESSING OF THE POLARIZATION STATE OF GEOPHYSICAL ULF SIGNALS

In this paper, the evaluation by running window smoothing is used for the digital processing of the polarization of geophysical ULF signals. The observed signals are resolved into two orthogonal complex components so that it is no longer necessary to consider the phase and amplitude of the signals simultaneously.     

GL—2型Φ600mm螺旋选别攀枝花钛铁矿生产实践

攀矿选钛厂设计采用传统的螺旋选矿设备ＦＬＸ一１型φ６００ｍｍ螺旋选矿机和φ１２００ｍｍ螺旋溜槽，从选矿（铁）厂磁选尾矿物料中回收原生粒状钛铁矿积累了多年生产实践经验。而广东有色金属研究院研制的ＧＬ一２型φ６００ｍｍ螺旋选矿机具有处理能力大、分选效率高、选别粒级宽、不需冲洗水及占地面积小等特点，有取代选钛厂目前使用的螺旋选矿设备之趋势。     

瞬态气体温度传感器研究

本文介绍了作者研制的瞬态气体温度传感器.针对传感器敏感元件的结构设计，应用等效物理模型，对影响温度测试精度和动态响应的结构参数以及使用方法进行了计算分析.研制出的温度传感器经激波管动态标定，证明其具有百微秒级的动态响应.本文最后介绍了在倒拖工况下，柴油机缸内瞬态气体温度的测试结果．     

6M32(51)氮氢气压缩机系统的技术改造

1 机组简介 6M32(51)-190/320-BX型氮氢气压缩机的基础件采用德国博尔格公司的专有技术,具体参数如下: 压缩介质:氮氢气,压缩级数:6级;转速:375rpm;行程:320mm,轴功率:2920kW,容积流量:190m~3/min;气量调节:回路调节,冷却填料润滑油:1.95 kg/h;重量:主机69.45t,     

Bright Blue Light—emitting Diodes Based on a Novel Fluorescent Dye Containing Heterocyclic Groups

Novel molecular material ,1-benzothiazoly-3-pheny1-pyrazoline (BTPP) was found to function as bright blue light emitting dye in organic electroluminescent device, and its optical and electric characteristics were investigated. This heterovyclic compound exhibited good characteristics of blue photoluminescence and electroluminescence,which had the emission peak at 450nm .The single layer light-emitting devices using BTPP as light -emitting material dispersed in poly(N-vinylcarbazole)(PVK) and double layer ones using PBD as hole block layer above the light-emitting layer were fabricated using conventional spin-casting and vaccum vapour deposition methods. The introduction of PBD has enhanced electron injection and luminance efficiency, compared with the single layer LEDs.     

Comparisons of PWM and one-cycle control for power amplifier with multilevel converter

Based on the concepts of cascade multilevel converters and one-cycle technique, comparisons are conducted to characterize the distortion of the pulsewidth modulation (PWM) and one-cycle control methods that were applied to converters. Simulation results for the different control schemes are obtained in PSIM software initially to see the effect of one-cycle control different from that of PWM control. Through the comparisons, the advantages and disadvantages are identified for each method. The one-cycle scheme is better than PWM control in reducing undesirable harmonics and tracing dynamic waveforms. Simulation and experimental results are also provided to verify the conclusions.     

移动互联网和它的增值业务

概述 通信发展的几个必然趋势 理想通信的目的:任何时间;任何地方;任何空间能随机地找到任何人,传送任何信息,全球一个网.     

GENERATION OF NONLINEAR INTERNAL WAVES ON CONTINENTAL SHELF

1 .　ＩＮＴＲＯＤＵＣＴＩＯＮＩｎｔｅｒｎａｌｔｉｄａｌｉｎｔｅｒａｃｔｉｏｎｗｉｔｈｂｏｔｔｏｍｆｅａｔｕｒｅｓａｐｐｅａｒｓｔｏｂｅｔｈｅｄｏｍｉｎａｎｔｍｅｃｈａｎｉｓｍｆｏｒｇｅｎｅｒａ ｔｉｏｎｏｆｔｈｅｃｏｈｅｒｅｎｔｏｃｅａｎｉｃｉｎｔｅｒｎａｌｗａｖｅｓｔｈａｔａｒｅｏｂｓｅｒｖａｂｌｅｗｉｔｈＳＡＲ ,ｃｌｏｓｅｒｔｏｓｈｏｒｅ ,ｒｉｖｅｒｉｎｅｏｒｇｌａｃｉａｌｉｎｔｒｕｓｉｏｎａｎｄｃｏｎｔｉｎｅｎｔａｌｂｒｅａｋｐｒｏｖｉｄｅｓｅｃ ｏｎｄａｒｙｇｅｎｅｒａｔｉｎｇｍｅｃｈａ…     

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。