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temporal variations
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  时间变化
     The data from 31 magnetometer stations at high latitude are used to examine the spatial distribution and temporal variations of auroral electrojet and of ionospheric convection during a moderate storm on May 15, 1997. Of these stations, 20 situate in between 60°N~80°N of the western hemisphere and other 11 lie along the geomagnetic longitude of about 120°E, the Europe IMAGE magnetometer chain.
     本文采用31个高纬地磁台站资料考察1997年5月15日一次中等磁暴期间极光区电集流和电离层对流的空间分布和时间变化; 其中20站处于纬度60°N~80°N之间的西半球,而另11站是偶极磁经度约为120°E的欧洲IMAGE地磁站链.
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     In this paper,the TOPEX satellite altimeter data observed from December 1992 to March 2005 are used to analyze the seasonal characteristics and temporal variations of ocean wave in the Chinese offshore waters.
     利用1992年12月-2005年3月TOPEX卫星高度计资料,对中国近海波浪季节特征及其时间变化进行了分析。
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     CHAMP is a German mini-satellite mission used to study on the earth science, atmosphere and their application, one of which is to precisely determine the global static long-wave-length characteristics of earth gravity and its temporal variations.
     CHAMP是用于地球科学和大气研究及其应用的德国小卫星,其任务之一就是高精度地确定全球静态地球重力场长波长特征和重力场的时间变化规律。
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     Research of the geographical distributions and temporal variations of air-sea heat fluxes over the Pacific
     太平洋海域海气热通量地理分布和时间变化的研究
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     Seasonal Characteristics and Temporal Variations of Ocean Wave in the Chinese Offshore Waters and Adjacent Sea Areas
     中国近海及临近海域海浪的季节特征及其时间变化
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  时间差异
     The analysis show that:1)there are significant 2~3 years and 10 years periodic signals in the drought/flood grade series of Fujian,but there are spatial/temporal variations for other periods;
     结果表明: 1)福建旱涝等级有 2~3a和 10a左右的显著周期,但其他显著周期有空间和时间差异;
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  时间演变
     The results showed the coupled system is capable of simulating and predicting of spatial and temporal variations of dust emission sources and transport.
     结果表明该模式对气象背景、沙尘源和沙尘输送的空间分布和时间演变有较好的模拟能力;
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  “temporal variations”译为未确定词的双语例句
     Temporal variations of coda Q ̄(-1) associated with the dahaituoshan, Beijing, earthquake of 1990
     Temporal variations of coda Q~(-1) associated with the dahaituoshan, Beijing, earthquake of 1990
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     Spatial and Temporal Variations of the Vegetation Growing Season in Warm-temperate Eastern China during 1982 to 1999
     1982~1999年我国东部暖温带植被生长季节的时空变化
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     The results show that:(1)the spatial and temporal variations of the phytoplankton diversity index(H′) are large during the survey period,ranging from 0.45 to 4.23;
     结果表明:(1)该区调查期间浮游植物群落的物种多样性时空变异显著,各站多样性指数值(H′)变动在0.45~4.23之间;
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     Spatial and temporal variations in salt-marsh vegetation in Wanggang area,Jiangsu coast,based upon TM imagery analysis
     江苏海岸王港地区盐沼植被变化的TM图像分析
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     Supported by the land_use/cover data set of National Resources and Environment Database (NRED) in the years of 1985, 1995 and 2000, s patial patterns and temporal variations of woodland resource changes from 1985 to 2000 were studied in the paper.
     该文在 3S技术支持下 ,利用中国资源环境数据库中 1985、1995和 2 0 0 0年 3期全国林地空间分布数据 ,通过建立林地资源时空演变模型 ,从时间序列和空间尺度上探讨了 1985— 2 0 0 0年中国林地资源动态变化的时空过程和内在动因 .
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  temporal variations
The spatial and temporal variations of zooplankton and its relationship with environmental factors were also analyzed.
      
However, in terms of temporal variations, higher δ18O in precipitation during spring is linked to small moisture flux while low δ18O in precipitation during summer is linked to large moisture flux.
      
Temporal variations in morphological characters of the shells were studied in 12 samples of mussels M.
      
The characteristic spatial and temporal variations in the rate of sulfate reduction were noted.
      
An advantage of the proposed test is the possibility of monitoring the level of unidentified environmental mutagens over many years, independently of its sporadic temporal variations.
      
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Based on a lot of explosion data from the Ma'anshan Mine before the M=6.0 Liyang earthquake on July 9, 1979, the seismic coda recorded at two local stations are explored to extract precursory informations before a large earthquake. The characteristics of travel time of coda and their temporal variation of frequency and amplitude decay are investigated. All these three characteristics have basically synchronous and consistent variations and appear to be independent of propagation path. The methods...

Based on a lot of explosion data from the Ma'anshan Mine before the M=6.0 Liyang earthquake on July 9, 1979, the seismic coda recorded at two local stations are explored to extract precursory informations before a large earthquake. The characteristics of travel time of coda and their temporal variation of frequency and amplitude decay are investigated. All these three characteristics have basically synchronous and consistent variations and appear to be independent of propagation path. The methods for determination of these three characteristics are described and a qualitative physical explanation for the obtained results is also presented briefly.

本文为了从区域地震的尾波中提取强震的前兆信息,试以江苏溧阳1979年7月9日6.0级地震前后的一系列安徽马鞍山爆破资料为基础,探讨了二个固定台站上的纪录尾波中,强震以前尾波走时持续时间特性、频率随时间的变化特性及振幅衰减特性等的变化情况,可以看到三者基本上一致同步变化,且在目前的观测和分析水平上,分辨不出途径的影响。本文叙述了这三个特征量的测定方法,并对分析结果作了定性的物理解释。

This paper discribes the behavior of water body in terms of individual bands of electromagnetic spectrum and their reflections on the correspond ing images. Remote sensing imagery is a real portrayal of surface features involved, and water bodies, such as rivers, lakes, estuaries and reservoirs, can be easily recognized on them. According to the flood plains, central bars, bed configuration, sideslope forms and flow structures in the Yangtze River, Yellow River, Weihe River, etc., maps of river bed configuration...

This paper discribes the behavior of water body in terms of individual bands of electromagnetic spectrum and their reflections on the correspond ing images. Remote sensing imagery is a real portrayal of surface features involved, and water bodies, such as rivers, lakes, estuaries and reservoirs, can be easily recognized on them. According to the flood plains, central bars, bed configuration, sideslope forms and flow structures in the Yangtze River, Yellow River, Weihe River, etc., maps of river bed configuration have been prepared, the general tendency for channel deformation has been recognized; the area of flooded land has been measured and spatial variations of river channels has been investigated. Moreover, comparison of remote sensing images obtained on different dates can show the temporal variation of river channel. For instance, the overlap of images prior to and after the shifting of the Yellow River Mouth gives the information about the aggradation limits at the new mouth; the comparison of different images in periods of high flow and low flow of the Poyang Lake clearly indicates the change of the lake shoreline;for the spring flood 1973 of the Mississippi River, the occurance and development of flooding, the flooding boundaries and the recovery of the flooded area have been illustrated by use of four images of different dates.In addition,color infrared image and MSS image can be used to investigate he concentration distribution in water bodies. The infrared images taken tduring different spans of time are particularly efficient in searching ground water and the source of thermal pollution.The establishment of general model for channel changes by various remote sensing images combined with field survey, together with calculation for fluid dynamics and the prediction for channel deformation, will make the reliable site selection for wharfs, ferries, reserviors and rational ar rangement of water projects possible,On the basis of the above imagery interpretation one can approach the quantitative analysis by means of imagery processing system, which is the future direction of research.

本文叙述水体在各个电磁波谱段的特性及其在相应图象上的反映.遥感图象是被摄地面形态的真实写照,在其上识别河、湖、海湾和水库等水体是容易的.文中根据长江、黄河、渭河等的河漫滩、江心洲和河床的微地貌、岸坡形态和水流结构,绘制河床地貌图,查明河床平面变形总趋势,量计滩地面积,研究河床空间变化,黄河河口改道前后的图象、密西西比河1973年春洪水过程中四个时间的图象作比较研究,可了解河床在时间上的演变规律. 此外,红外片、多光谱片还可研究水体含沙量的分布,寻找地下水和热污染源. 由各种遥感图象结合外业调查,建立河床演变一般图式,进行计算和预测,就能做到有根据地选择渡口码头、库址,布设水利工程.

In this paper, the theoretical model for the developing earthquake reedia has been propsed and the mechanics relations and motion equation intwo-phase media have been established. The properties of two-kind p-waves in the developing earthquake media have been demonstrated. The authors have studies also the reflective and refractive coefficients for propagation of seismic waves in the layered multi-phase media. The methods for selecting parameteres have been discussed and The displacement field in the developing...

In this paper, the theoretical model for the developing earthquake reedia has been propsed and the mechanics relations and motion equation intwo-phase media have been established. The properties of two-kind p-waves in the developing earthquake media have been demonstrated. The authors have studies also the reflective and refractive coefficients for propagation of seismic waves in the layered multi-phase media. The methods for selecting parameteres have been discussed and The displacement field in the developing earthquake media calculated. Specifically, for instance, the aarbors have analyses the temporal and spatial characteristics of the amplitude ratio, including those of the imminept shock anomaly before and after the Haicheng earthquake of February 4. 1975 Finally, theamplitude ratio anomaly is interpreted preliminarily from the point of view of physical implication.Theoretical and practical results show that (1) The seismic velocities, amplitudes and waveforms may variate when they travel throh the developing earthquake media, especially, the variations of the p-amplitude are bigger. The variations of amplitude ratio depend mainly on the variations of p-amplitude. In the two-phase media with gas saturation, the p-amplitude is bigger than in the solid-phase, oppositely, in the two-phasemedia with liquid-saturation the p-amplitude is less than in the solid-phase. (2)The forms of the temporal variation before and after the Haicheng earthquake appeared as follows: lower value and then revalue—higher and stable value—occurence of shock-falling. The spatial variation was that the amplitude ratio in the periphery was lower, in the middle higher, the fringe on the high-value region was a dangerous region of major shcok. (3) The amplitude retio increased sharply before imminent shock and earthquak occured when the amplitude peak was falling. The time for appearing peak depended on the epicentral distance and azimuth Generally, it appeared in periphery and in some position at first and then in epicentral area. Based on the preceding coclusions the possibility that the amplitude ratio as a pre cursor may be applied toearthpuakes prediction has increased.

本文提出了孕震介质的理论模型,建立了两相介质中的力学关系和运动方程,论证了孕震介质中两类P波的性质,推导了多相层状介质中地震波传播的反射和折射系数,讨论了参数选取办法並计算了孕震介质中的位移场。具体分析了1975年2月4日海城地震前振幅比变化的吋、空特性,尤其是临震异常特性。並从物理实质上对振幅比异常作了初步解释。

 
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