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周期段
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  period region
     Applied by distribution resistance and volume porous for calculation of fluid flow and heat transfer of the shell and tube heat exchanger,based on the floating characteristic and the structural characteristic of heat exchanger with longitudinal flow of shellside(HELFS), this paper discusses simplification method problem for numerical simulation of large HELFS, and pus forward the geometry prototype period region model and four tube model calculation method, to solve simulation problem of large HELFS.
     针对目前弓形折流板管壳式换热器采用分布阻力、容积多孔度等概念来计算壳程流体流动的方法 ,根据纵流壳程换热器的结构特点和流动特点 ,探讨了大型纵流壳程换热器数值模拟的简化计算问题 ,提出了几何原型周期段模型简化计算法和四管模型简化计算法 ,以解决大型纵流壳程换热器数值模拟问题 .
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  “周期段”译为未确定词的双语例句
     The periodic structure of the ISOs over SCS is complex and there are two major periods of 50-70 days with peak at 53.8-day (ISO1) and 13-36 days with peak at 32-day (ISO2).
     南海地区ISOs的周期结构具有复杂性,主要有两个周期段,即以53.8d为峰值的50~70d振荡(ISO1)和以32d为峰值的13~36d振荡(ISO2)。
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     It indicates that compared with the response spectrums of no velocity pulse records, the response spectrums of velocity pulse records have longer maximum number range, as well as bigger numbers at long periods.
     结果表明在近断层的情况下,相对无速度脉冲记录,有速度脉冲记录反应谱的平台段较长,在长周期段,有速度脉冲的记录的反应谱值要比没有速度脉冲的反应谱值偏大;
短句来源
     The results show that the phase velocity distribution in Yunnan region has strong variations in horizontal direction, and the phase velocity distribution in short-period range is closely related to the thickness of sedimentary layers in the shallow crust.
     结果表明 :云南地区的相速度分布图象具有强烈的横向变化 ,短周期段的相速度分布与沉积层厚度密切相关 ,中甸、丽江东部区域在约 2 5km深度存在着明显的低速层 ,而畹町、云县、思茅一带在该深度范围是一明显的大面积高速区域 .
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     Its quasi-period for Tibetan region was 7.7 years, in other six regions there were main quasi-biennial and 5~6 years periods.
     除西藏区有7.7年的周期外,其它6个区的周期基本上都集中在准2年和5~6年两个周期段
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     The pines show significant response to solar activity in 5~8-yr,10~12-yr and 20~30-yr periodicity band. This response showed significant signals of 5.8-yr,11.5-yr and 27.2-yr periodicities. The strongest response signal was shown in 11.1-yr periodicity of solar activity.
     油松在5~8年、10~12年和20~30年周期段对太阳活动表现出积极的响应,呈现5.8、11.5和27.2年的强周期震荡,响应信号在太阳活动的主周期11.1年左右表现最强。
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  相似匹配句对
     A BRIEF DISCUSSION OF CYCLE
     周期浅析
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     Credit Cycles
     信贷周期
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     ON DOUBLY-PERIODIC RIEMANNIAN BOUNDARY VALUE PROBLEMS ALONG OPEN ARCS
     开口弧的双周期Riemann边值问题
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     Periodic Orbits of Three-pieces Monotone Expanding Self-maps on the Interval
     区间上三单调扩张自映射的周期轨道
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     2. kick-off section;
     2,造斜
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  period region
Ths cepheid has an extremely long period and gives a possibility to determine the period-amplitude envelope toward the long-period region in M31 galaxy.
      


In this paper variations in the contents of major chemical components and trace elements of sequential samples of loess and paleosol from the Luochuan section in Shaanxi Province have been studied. Nine geochemical boundaries respectively corresponding to paleomagmatic events or stratigraphic boundaries have been identified from among the strata of loess and poleosol. Also four main period-terms changing in element content, which are 364-222 ka, 141-84 ka, 45-34 ka and 25-14 ka, have been recognized. It is evident...

In this paper variations in the contents of major chemical components and trace elements of sequential samples of loess and paleosol from the Luochuan section in Shaanxi Province have been studied. Nine geochemical boundaries respectively corresponding to paleomagmatic events or stratigraphic boundaries have been identified from among the strata of loess and poleosol. Also four main period-terms changing in element content, which are 364-222 ka, 141-84 ka, 45-34 ka and 25-14 ka, have been recognized. It is evident that the evolution of chemical ele-ments is of phase and periodicity. The four period-terms mentioned above are consistent with those calculated by Milankovitch for elements of Earth's orbits and oxygen isotopic (6 0) values for deep-sea drill cores. That is because paleoclimatic changes in the Quaternary period are controlled by some astronomical factors.

本文用四种数学模型计算了洛川黄土剖面序列样品,发现九个与古地磁事件或地层分层对应的地球化学界线和四个稳定周期段:364—222ka,141—84ka,45—34ka和25—14ka。四个周期段与地球轨道要素和深海岩心δ~(18)O值的变化周期一致,表明第四纪气候变迁受天文因素控制。

Using the monthly NH 500hPa mean height field data from1951 through 1988,the blocking patterns in the northern hemisphere areanalyzed statistically from the viewpoint of monthly means. Power andcross spectrum analyses show that the results from Scheme Care similarto those from Scheme D; periods of two and a half years (about 30months), one and a half years (18-20 months) and 2-5 months are all ofconsiderable importance for the time series of area index in the regions;there is a good negative in-phase correlation...

Using the monthly NH 500hPa mean height field data from1951 through 1988,the blocking patterns in the northern hemisphere areanalyzed statistically from the viewpoint of monthly means. Power andcross spectrum analyses show that the results from Scheme Care similarto those from Scheme D; periods of two and a half years (about 30months), one and a half years (18-20 months) and 2-5 months are all ofconsiderable importance for the time series of area index in the regions;there is a good negative in-phase correlation between Region Ⅰ andRegion Ⅱ: and periods with remarked coagulation exist in both the longand short time periods.

本文利用1951—1988年,逐月北半球500hPa月平均高度场资料,从月平均的角度对北半球阻塞形势进行了统计分析。功率谱、交叉谱分析表明,方案C、D的结果是相似的;对各区面积指数时间序列2年半(30个月左右)、1年半(18—20个月)和2—5个月的周期都是比较重要的;Ⅰ区和Ⅱ区具有较好的同位相负相关;在长、短周期段均有凝聚显著的周期存在。

The results from large scale shaking table and numerical calculations have showed that the effect of liquefied soil layer on ground motion is appeared mainly as variation in form,amplitude and spectrum of history of the ground motion and was begun when pore water pressure ratio reaches 0. 6 - 0. 7. Besides,the short period waves will be reduced and even be filtered out and in-versly,the long period waves will be amplified. The range of reduced or filtered frequency will change with various factors. The beginning...

The results from large scale shaking table and numerical calculations have showed that the effect of liquefied soil layer on ground motion is appeared mainly as variation in form,amplitude and spectrum of history of the ground motion and was begun when pore water pressure ratio reaches 0. 6 - 0. 7. Besides,the short period waves will be reduced and even be filtered out and in-versly,the long period waves will be amplified. The range of reduced or filtered frequency will change with various factors. The beginning time and the initial liquefaction effect time of the soil layers depend significantly on the characteristics of the input waves. The results obtained here can give a good explanation on the phenomena of earthquake damage.

大型振动台模型试验和计算分析结果表明,土层液化对地面运动的影响主要表现为:液化段地面运动时程在形状、幅值和频谱等方面均有很大变化;而且,当孔压比达到0.6—0.7时土层液化就开始对地面运动产生影响。此外,波的短周期成份降低甚至被滤掉,长周期成份被放大,但是这种被滤掉或放大的周期段将随各种因素而变。输入地震波特征对液化时刻或液化开始起作用的时刻有重大影响,所得结果可用以很好解释液化宏观震害现象。

 
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