震源

Focal mechanism solutions of 4 events, for which required parameters are available, indicate left lateral strike slip faulting for 3 events and thrusting for one event.

结果表明，有 3次地震是左旋走滑断层活动，另一次地震是逆断层活动。地震震源机制解的P轴方向为NW SE和NE SW 。

In earthquake location, the global search technique and the simplex step algorithm were used to find the source location with the minimum arrival time error completed in space domain. Thus, the results are stable, and avoid the non-linear effects in the process. The location results are better than the Geiger's method.

使用全局搜索方法和单纯形方法的定位技术在空间域直接寻找到使走时误差达到最小的震源位置，能得到稳定的结果，避免了问题的非线性的影响，定位效果通常好于常用的Geiger方法。

A fault plane solution illustrates the direction of slip and the orientation of the fault during the earthquake.

答：除了确定地震的位置和等级，地震学家们现在也确定其中的&断层面&问题或&震源机制&。

The results of the study showed that:① Using dozens of kilograms of explosives the signal can be detected at distances up to 200 km;②Active source has a certain degree of repeatability among different shots;③This paper presents the following shooting mode and signal detection method based on the similarity of different shots: In light of the similarity between the signals of big shot and small shot, this paper presents a cross-correlation method using signal from big shot signal with high SNR and small shot signal to detect weak small shot signal, the method can effectively detect the small shot signal and pick up the start time of phase, this method can help us make full use of past seismic exploration data records.

野外实验采用1次大当量激发和16次小当量激发，研究结果表明：①有可能利用数十公斤当量的炸药实现200km距离的探测；②在激发条件相同时，不同当量的激发波形滤波后存在一定的相似性；③依据人工震源可重复性采用以下的激发组合方式和处理方法能够有效提高信噪比：针对大当量激发与小当量激发波形的相似性，利用大当量激发的波形作模板与小当量激发的波形作相关，可判断台站是否接受到小当量激发的信号并检测其震相到时信息。

Based on basic theory of elastic wave propagation, wave equation forpropagation of elastic wave in 2 dimension vertical inhomogeneous mediumof similar concrete cutoff wall model is developed. 2 dimension elastic sheetof concrete cutoff wall is established to research law and energy distributionrelations between propagation, attenuation, reflection and transmission ofelastic wave in concrete cutoff wall; Based on the concept of resolution, thecontent of vertical reflection method used to inspect concrete cutoff wallresolution is raised and factors will have influences on resolution are analyzed,expression of defective layer composite reflection factor and detectabledefective layer maximum thickness are developed; Relations between allsteps of sampling system of vertical reflection are build, the influence ofcentrum characteristics and receiving sensor on testing results are analyzed,therefore parameter requirements for testing instrument and parameter selection principle of collected parameters are raised.

2从弹性波传播的基本理论研究出发，推导了弹性波在类似混凝土防渗墙模型的二维垂向不均匀介质中传播的波动方程式；建立了混凝土防渗墙二维弹性薄板模型，研究弹性波在混凝土防渗墙中的传播、衰减、反射、透射规律及能量分配关系；从分辨率的概念出发，提出了垂直反射法检测混凝土防渗墙分辨率的内涵，对影响分辨率的因素进行了分析，推导出了缺陷层复合反射系数、可检测缺陷层极限厚度的表达式；建立了垂直反射法采样系统各环节之间的关系，研究分析了震源特性、接收传感器对测试结果的影响，提出了对测试仪器参数的要求及采集参数的选择原则。

SiWu is equipped with over 640 sets of medium and large-sized equipment, including 35 sets of desert rigs, 93 sets of off-highway transport vehicles, 16 sets of vibrators, 60 sets of other models of rigs, and 40 sets of desert transport vehicles.

四物大队共有大中型设备640余台，沙漠钻机35台，野外越野运输车93台和可控震源车16台，其它钻机60台，沙漠运输车40台。

Therefore the near-source attenuation of the ground motion looks like slow. The co-seismic faulting was dominated by strike-slip motion with the oblique normal fault component.

地震发生时的断层运动是兼有倾斜正断层运动的走滑破裂和错动，震源断层附近的垂直地面运动非常强烈。

A kind of low detonation velocity seismic explosive column charged with low detonation velocity explosive in which self-sensitized and improved expanded ammonium nitrate is oxidizer was investigated.

研究一种以低爆速膨化硝铵炸药为主装药的低爆速震源药柱。

Keywords physical chemistry;seismic explosive column;low detonation velocity;ammonium nitrate explosive;explosive property;safe property

物理化学；震源药柱；低爆速；硝铵炸药；爆炸性能；安全性能

The earthquake's epicenter and focal-mechanism are consistent with it having occurred as the result of movement on the Longmenshan fault or a tectonically related fault.

这次地震的震中及震源机制是一致的，它有发生的结果，运动对龙门山故障，或构造有关的故障。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。