前兆的

Some of them are to surround the epicenter, and others of them are to reduce gradually.

这些前兆异常现象同通常认为的越临近地震前兆异常数目越多是不一致的。

Through the study, we can conclude that improper slave function shows fairly good earthquake-reflecting capacity to earthquakes with MS 5.0 in eastern China, which can be regarded as comprehensive parameter to the medium-term and short-term earthquake prediction and can determine three elements of an earthquake more exactly.

利用模糊数学中异常从属函数方法对1990～1997年华东地区16种前兆观测方法，近5万组观测数据的综合前兆场进行了时空演化特征研究结果表明，异常从属函数μ对发生在华东地区的MS≥5.0地震有较好的映震能力，可作为中期、中短期预报的综合指标，对地震三要素可作出较为准确的判定

In some areas, obvious precursors can be observed, but in other areas, it may be difficult to observe any appreciable precursory phenomena.

在一些区域，可以观测到明显的前兆，而在另一些地区却很难观测到明显的前兆现象。

So,how to determine precursory clustering earthquake and how to fully utilize it to forecast earthquake and to monitor earthquake activity need to be deep studied and probed.

所以，如何判定前兆震群和充分利用前兆震群预报地震和监视未来地震活动有待更深入的研究和探讨。

The complexity is that all precursory abnormities of short-term is inconsistent in half a year before earthquakes.

这3次地震前兆异常的共性是地震前半年都出现了不同程度的短期前兆异常变化，且在震前2个月，短期异常均超过8项。

The comparative investigation of the characteristics of deformation and AE were conducted and the results are presented as followed: 1. The characteristics of rock AE are correlated to the strength, joints, cracks, and the size and hardness of crystalline grain. 2. The sequence of AE can be divided into four phases: beginning phase, tempestuousness phase, drop phase and dreariness phase. The loss and the duration of the phases are correlated to the rock character and flaws in the rock. 3. The AE rate characteristics are not almost concordant with the AE energy rate. 4. Besides the homogeneity, the strength of rock contributes the activity of AE. The higher the strength is, the lower the activity is. 5. There is a dreariness phase before the failure of most kinds of rock. 6. Whether the precursor is obvious is correlated to rock the character, and the precursor of AE rate is more apparent than the precursor of AE energy rate comparatively.

通过对比研究这六种不同岩石的变形和声发射特征发现，岩石声发射受到岩石强度、节理裂隙和晶粒软硬大小等的影响；岩石声发射过程存在初始区、剧烈区、下降区和沉寂区，各个阶段是否存在及持续时间与岩石强度、内部缺陷等有关；岩石的声发射事件率特征与能量率特征并不完全一致；岩石的声发射活性除了受其均匀性影响外，还受到岩石的强度影响，强度越小，声发射活性越强；大多数岩石破坏前存在一声发射沉寂区；岩石的破坏前兆是否明显跟岩性有关，相比较而言，岩石破坏时的声发射率前兆比声发射能量率前兆更为明显一些。

In this paper, some methods of fuzzy mathematics suah as the direct method of fuzzy pattern recognition, the method of fuzzy clustering analysis the method of fuzzy information retrieval, and the recently advanced method of fuzzy fractal dimension have been applied to earthquake monitoring and prediction in the Surrounding Capital Area based on the seismicity and earthquake precursors. The seismic and unseismic precursors before both the Tangshan M=7.8 great earthquake in July, 1976 and the Datong-yanggao M...

本文把模糊数学中的模糊模式识别的直接方法、模糊聚类分析方法、模糊信息检索方法和新近提出的模糊分维方法应用到以地震活动性和地震前兆为基础的首都圈地震监测预报当中，分析研究了发生在这一地区的两次大地震，即1976年唐山7.8级和1989年大同6.1级地震前用模糊数学方法识别出的地震学前兆和非地震学前兆，并对这一地区大地震的长期和中短期模糊预报方法与途径进行了简要的讨论。

Proved by long time prevention work and scientific research that coal and gas outburst takes place suddenly but has a lot of auguries including AE before outburst.

长期的防治工作和科学研究表明，煤与瓦斯突出虽然是突发性的，但在突出前均有前兆显现，其中声发射就是前兆之一。

The main methods we adopted including infrasonic wave, crustal stress, geoelectricity, micro vibration of the earth and tide generation of force resonance, etc.

我们经过 2 0多年的临震前兆观测研究发现：目前我们所了解的地震前兆观测方法都存在非震异常现象(即有前兆异常，并无地震发生)。

This earthquake occurred at edge of 2003 year seismically risk zone. In this paper, on the basis of main evidence of the year risk zone and anomaly tracking, the authors analyzed the precursory anomalies including groundwater level of Dadianzi well and Kulun; water radon of Kailu well before MS5. 9 earthquake. At the same time, the authors also analyzed and studied the precursory anomalies around Inner Mongolia region. The ...

根据年度危险区的确定、前兆异常跟踪及其主要依据，分析了这次5.9级地震前大甸子井、库伦井地下水位、开鲁井水氡等前兆异常，在此基础上，对内蒙古附近区域的前兆异常也进行了分析和探讨，表明该次地震前在内蒙古及附近区域出现了一组中期、短期前兆异常及宏观异常，文中还研究了该区域前兆异常的演化过程。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。