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Our result shows that the best double couple solution of this Mw5.2 event is 315°,64°and 19°for strike,dip and slip angles respectively,the second nodal plane solution is 214°,74°, and 152°.The focal depth is 25±2km,suggesting that this quake occurred in the lower crust which is much deeper than most continental earthquakes.This lower crust earthquake requires that the rock should be colder than expected.We proposed generation mechanism of this deep earthquake and its implications in rock strength and thermal state.

我们以此速度结构作为模型,利用中国国家地震台网5个台站的宽频带地震数据,采用CAP方法反演2003年8月16日赤峰地震震源机制解并初步确定震源深度:再利用IRIS 9个台站远震体波数据,通过对比高频(0.7~2.0Hz)理论地震图和观测记录的方法进一步精确确定震源深度并验证反演得到的机制解,得出此次地震矩震级为5.2,震源机制解为:节面I:315°/64°/19°,节面Ⅱ:216°/74°/152°,震源深度为25±2km,已深达下地壳。

With this velocity model and broadband records from 5 CDSN stations, we inverted focal mechanisms of Chifeng earthquake on August 16th, 2003 with the "Cut and Paste" method. Then we confirmed focal depth and the source mechanisms by comparing synthetic body waves at teleseismic distance with broadband records of 9 IRIS stations. Our result shows that the best double couple solution of this M w5.2 event is 315°, 64° and 19°for strike, dip and slip angles respectively, the second nodal plane solution is 216°,74°, and 152°. The focal depth is 25±2 km, suggesting that this quake occurred in the lower crust which is much deeper than most continental earthquakes.

我们以此速度结构作为模型,利用中国国家地震台网5个台站的宽频带地震数据,采用CAP方法反演2003年8月16日赤峰地震震源机制解并初步确定震源深度;再利用IRIS 9个台站远震体波数据,通过对比理论计算和观测记录的方法进一步精确确定震源深度并验证反演得到的机制解,得出此次地震矩震级为5.2,震源机制解为:节面I:315°/64°/19°,节面II:216°/74°/152°,震源深度为25±2 km,已深达下地壳。

In this paper, the dual-channel optocoupler and current conveyors are employed to achieve the wide bandwidth isolation amplifier.

本论文采用双通道的的光耦合器和电流转换器来设计一个宽频带的隔离式放大器。

Series digital geophones are mainly used in petroleum exploration. The series have wide frequency band,high spurious frequency and all parameters are controlled within 5%.

系列数字地震检波器主要用于石油勘探,具有宽频带和较高的假频,各参数指标容允差均在5%以内。

"He hypnotised everyone at Motorola to follow him," says Sean Maloney, a senior executive at Intel, the world's biggest chipmaker, who has himself spent several years championing WiMAX, an emerging mobile-broadband technology.

&西恩·玛洛尼是世界最大的芯片厂商英特尔公司的高级主管,曾亲自花了数年的时间推广WiMAX这项新兴的移动宽频带技术,他说:&库珀把摩托罗拉所有人都催眠了,让他们跟着他。

The broadband transmission-line transformer with 4:1 impedance transformation ratio is studied,its equivalent model with mutual coupling between transmission-lines is given,and its impedance transformation characteristics are analyzed.

研究了变换比为4:1的宽频带传输线变压器,给出了考虑线圈互耦的等效电路模型,分析了其阻抗变换特性。

Through inversing receiver function of 34 seismic stations, we obtain S wave velocity structures beneath the stations.

利用71个远震的波形资料,用接收函数方法提取了布设在长白山—镜泊湖火山区的34个宽频带流动数字地震台站的接收函数,通过对接收函数反演,获得了台站下方的S波速度结构。

For narrow-band signals, three uniform linear arrays, whose grating lobes are not overlapped by setting the angles between the arrays and the same pointing of main-lobes, are used and then multiplication of three patterns is operated to reduce the grating lobes of large-spaced array, which makes the array operate in broad band. For wideband or ultra-wideband signals, array pattern in the whole frequecy band is identical by designing the frequency-dependent weighting coefficients based on the Bessel function, and therefore grating lobes in high frequency parts are suppressed.

对于窄带接收信号,利用三个相交的大间距均匀线阵,通过设置它们之间的角度和主瓣指向相同使各自的栅瓣位置错开,然后把三个方向图相乘从而抑制大间距阵列栅瓣,因而适用于宽频带工作;对于宽带接收信号,利用Bessel函数设计与频率有关的加权系数,产生整个信号带宽内恒定的方向图,从而抑制了高频部分的栅瓣。

Being associated with three research projects, this dissertation makes deeply insight into the fast and accurate analysis, optimal design and manufacture of HF and VHF/UHF broadband omnidirectional miniature loaded wire antennas, loaded helical antennas and multiple-tuned VLF inverted L valley span antennas.

本文密切结合&十五&国防预研项目&软件无线电天线&和&宽带小型化天线&以及国防重点项目&某长波台发信天线电气参数分析与设计&等项目,研究了短波和超短波频段上的宽频带加载线天线、加载螺旋天线和超长波倒L形多路调谐山谷天线的快速精确分析、优化设计以及样机制作。

DG1000 series function / aleatoric and undee generator can offer 5MHz, have rise quickly edge and drop the square wave of the edge, and have the frequency of high accuracy, broadband belt measure a function.

DG1000系列函数/任意波形发生器能够供给5MHz、存在迅速回升沿和回升沿的方波,而且存在高精度、宽频带的频率测量性能。

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