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abrupt changes
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  突变
     In this paper, some abrupt changes of the air temperature and precipitation from 1873 to 1989 in Shanghai and Beijing have been tested using Mann-Kendall method.
     本文应用Mann-Kendall方法对1873—1989年上海、北京的气温、降水时间序列进行了突变检验。
短句来源
     There are three zones of abrupt changes for high- and low-velocity bodies at depths below 200 km, which are at 30 km, 80 km and 130 km, corresponding to the depths of the Moho, the lithosphere and the asthenosphere, respectively.
     200km深度以上的高速体与低速体发生突变的地带,分别处于30km、80km、130km的深度上,相当于Moho面、岩石圈、软流圈的大致深度。
短句来源
     The time and the direction of abrupt changes of precipitation coincided well with the abnormal variations of solar activity.
     降水量突变发生的时间和方向与太阳活动异常较为一致,因此推测太阳活动的长期变化是导致德令哈降水量发生突变的主要原因。
短句来源
     The on-line identifications of nonlinear structures with Bouc-Wen model and structures with certain abrupt changes in the structural parameters are studied based on the new on-line identification algorithm for nonlinear structures.
     基于最新的非线性结构在线识别理论,研究了具有Bouc—Wen模型的非线性结构和具有参数突变结构的在线识别问题。
短句来源
     This general trend of circulation evolution is marked by several abrupt changes at 8~7Ma, 3.4Ma and 1.2~0.9Ma, which is interpreted as the effects of the uplifted Tibet Plateau on the monsoonal circulation evolution and on the westerly circulation patterns over Late Cenozoic.
     大气环流的这种趋势变化在8~7Ma,3.4Ma和1.2~0.9Ma这几个时期存在着突变,可能反映了青藏高原的阶段性隆升对中国北方季风环流演化的决定性作用以及对西风环流结构和强度的重要影响。
短句来源
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  突变事件
     The fact that well correlation of short-term abrupt changes in our record to those from the sediments of the North Atlantic and ice core in Greenland reminds us of interconnection of the climatic events in the area prevailing over East-Asian monsoon to those in high latitudes. It is quite important for global Late Pleistocene climato-stratigraphy, the mechanism of East-Asian monsoon and the study dealing with the cause and response of global climate changes.
     对其与北大西洋沉积及格陵兰冰芯记录所揭示的短尺度气候突变事件的可比性 ,表明东亚季风气候变化 ,与高纬度地区的气候变化呈遥相关响应 ,对研究东亚季风气候驱动机制及其与全球气候变化的响应关系和对晚更新世的地层学研究 ,均具有特别重要的意义。
短句来源
     In this paper,we try to verify the effectiveness of heuristic segmentation algorithm in dealing with nonlinear time series by an ideal time series. Through detecting and analyzing the information of abrupt climate changes contained in recent 2000a's tree annual growth ring,we succeeded in distinguishing abrupt changes with different scales.
     在BG算法的基础上,通过理想时间序列验证BG算法处理非平稳时间序列的有效性,并对近2000a北半球树木年轮距平宽度序列基于不同层次的思想,检测和分析其中包含的各种尺度的气候突变事件,成功地区分不同尺度的突变.
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  “abrupt changes”译为未确定词的双语例句
     The results showed that,as long as the experiment maintained the temperature at 15.5-25 ℃ without abrupt changes,the pH value of reactor being 6.8-7.2,and with the alkalinity of the influent water being above 800 mg/L,UASB could run well and efficiently.
     研究结果表明,只要维持温度在15.5~25℃且不发生突降、反应器pH值在6.8~7.2、进水碱度大于800 mg/L,即能保证UASB的稳定高效运行。
短句来源
     Research on detecting abrupt changes of signals via S transform and wavelet transform
     S变换与小波变换检测信号突变性研究
短句来源
     The results show that 1)the response amplitude of thedownstream cylinder is larger than that of the upstream one,2)the responses in critical Reynolds numbersare different from those in subcritical Reynolds numbers,and 3)There are abrupt changes of the dynamicresponses between L/D≤3.0 and L/D≥4.0.
     实验结果表明:下游柱振动比上游柱大,在临界雷诺数区中,圆柱动态响应与亚临界雷诺数区中的动态响应不同,在3.0
短句来源
     (2) The Holocene Megathermal Period. The abrupt changes of warm wet at 8.5~ 8.0kaB.P. and cold dry at 4.0~3.5kaB.P.
     8.5~8.0kaB.P.和4~3.5kaB.P.暖期的开始与结束事件中降水变化落后于温度变化300~500a;
短句来源
     A Likelihood Ratio Method Based on Instantaneous Abrupt Changes in Fault Diagnosis of Dynamic System
     动态系统故障诊断中基于瞬间跳变的似然比方法
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  abrupt changes
Moreover, the general case of incident electron with any given momentum and spin state are studied numerically in detail, including the abrupt changes of spin direction and the two-step characters for reflection.
      
Abrupt changes in the molecular arrangement in the cluster were not found.
      
The shocks and contact discontinuities in such a case are domains with abrupt changes in the gasdynamics parameters.
      
Electrohydrodynamic flows in which there are zones of abrupt changes in the electric charge (while remaining bounded, by assumption) are investigated.
      
Under these conditions the Mn2+ ions strongly affected the DNA structure, which was reflected in abrupt changes in the CD spectra of DNA in the complex in the range of 260-290 nm.
      
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In two previous papers[1,2] the author presented a generalized theory of local normal modes by introducing the method of slowly varying coefficients-a mathematical method to solve systems of first order linear differential equations with slowly varying coefficients, which are associated with problems of multi-coupled modes in irregular waveguides. However, the theory presented therein was not in a form to adapt itself to problems involving abrupt Changes of the waveguide parameters, which are inevitable in any...

In two previous papers[1,2] the author presented a generalized theory of local normal modes by introducing the method of slowly varying coefficients-a mathematical method to solve systems of first order linear differential equations with slowly varying coefficients, which are associated with problems of multi-coupled modes in irregular waveguides. However, the theory presented therein was not in a form to adapt itself to problems involving abrupt Changes of the waveguide parameters, which are inevitable in any practical transmission system. The purpose of the present paper is to consider such abrupt changes in the light of the above theory, so that the concept of local normal modes may be used to describe a broader class of problems.

在前两篇论文中,作者提出了一种求解缓变系数一阶常微分方程组的数学方法——“缓变系数法”,从而建立了多波型波导本地简正波的广义理论。但是,该文所提的理论没有考虑到波导参数突然变化的情形,而这在任何实际的传输系统中是不可避免的。本文的目的是从耦合简正波理论的观点来研究波导特性的突变。这样,就使本地简正波的概念能够用来描述更多的波导传输问题。

The effects of variable load on the abrupt change of power output and discontinuity of oscillation of a. reflex klystron are investigated. The reflex klystron under study is of metal construction with integral resonant cavity operating in the "X" band.Analysis is made of the effects of overload, long line, multiple transits of electrons, parasitic resonance and imperfections in the design of the integral resonator.Among the factors which affect the load characteristics the most important one is shown to...

The effects of variable load on the abrupt change of power output and discontinuity of oscillation of a. reflex klystron are investigated. The reflex klystron under study is of metal construction with integral resonant cavity operating in the "X" band.Analysis is made of the effects of overload, long line, multiple transits of electrons, parasitic resonance and imperfections in the design of the integral resonator.Among the factors which affect the load characteristics the most important one is shown to be the design of the resonator, especially that of the distribution of side and gap capacitances as well as the curvature of the grids in the gap.The theory of parasitic resonance is briefly treated, and the experiments which have been performed to locate the parasitic resonance are described. Finally, a method of eliminating the parasitic resonance is illustrated.

本文叙述了某X波段金属内腔反射速调管的振荡功率曲线随负载变化时出现的凹坑或振荡中断现象,在分析该现象出现的原因时,应区分是由于电子多次渡越造成的迟滞现象、长线效应、负载过重、寄生诸振,还是由于谐振腔设计上的缺陷。 文章指出,在影响负载特性的诸因素中,谐振腔的设计,尤其是中央突起部分的隙缝电容与旁侧电容的合理分配,以及构成高频隙缝的栅网曲率最为重要。 文章简要介绍了寄生诸振的理论,指出了消除寄生造振的途径,并举出实例说明解决的方法。

In this work, the method of "Compressed Mass Plane" is used to draw from gravity data the depth contours of the Mehorovicic Discontinuity, the Conrad Discontinuity and the lower surface of the granite layer I beneath the central portion of the Himalayan Mountain Range. It can be seen from such contours that within the Himalaya region, the depth of the abovementioned crustal discontinuities varies rather abruptly. The Himalayan mountain range is situated on the sloping part of these crustal discontinuities. The...

In this work, the method of "Compressed Mass Plane" is used to draw from gravity data the depth contours of the Mehorovicic Discontinuity, the Conrad Discontinuity and the lower surface of the granite layer I beneath the central portion of the Himalayan Mountain Range. It can be seen from such contours that within the Himalaya region, the depth of the abovementioned crustal discontinuities varies rather abruptly. The Himalayan mountain range is situated on the sloping part of these crustal discontinuities. The crust in this region appears to have no "mountain root" and it has not reached the stage of isostatic equilibrium. However, in southern Tibet, north of the line running from Chu Zhong, Cha Dang to Ge Long Gong Ba (楚中,查当至戛隆公巴), the crust seems to be in isostatic equilibrium. The gradual uplifting at present of the Himalayan mountain region possibly involves the existence of forces relating to plate tectonic movements which may be considered as much stronger than that of the isostatic adjustments. Besides, earthquake source mechanism analysis giving a south-north direction for the axis of compression, and also in view of the thrusting character of a series of major faults observed in this region, it may be inferred that the Indian Plate moving northward pushes and collides with the Asian Plate. Again, all such facts as the epicentral distribution of shallow earthquakes of the Himalaya region forming belts, the structural peculiarity of the crustal layers, abrupt change of the depth of the Mohorovicic Discontinuity and finally the state of incomplete isostatic equilibrium constituent the tectonic background for the frequent occurrence of strong earthquakes in this region.

利用压缩质面法反演重力资料,得到了喜马拉雅山脉中部地区的莫霍界面、康腊界面及花岗岩Ⅰ层底部界面的等深线图。从这些图可以看出,在喜马拉雅山区,上述各个地壳界面剧烈变化,喜马拉雅山正处于向北逐渐加深的斜坡上,地壳还缺乏“山根”,因而这个地区的地壳还未达到均衡。但藏南的楚中、查当至戛隆公巴一线以北地区,地壳已处于均衡状态。喜马拉雅山区目前还在逐步上升,说明有比均衡调整力更为强大的板块构造运动力存在。由地震机制的压力轴近于由南向北,以及一系列逆断层性质的大断裂,说明存在印度板块向北运动与亚洲板块互相挤压碰撞。由喜马拉雅山地区浅源地震震中呈带状分布及深部地壳构造特征得出,莫霍界面的急剧变化、地壳未达到均衡是容易发生大地震的深部构造环境。

 
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