周期法,period method
1)period method周期法
1.The worth of neutron beam with different material was measured with extra-(polation) method and period method on the miniature neutron source reactor zero power experiment facility.在微型反应堆零功率实验装置上采用外推临界法和周期法,测量了在微型反应堆外添加或去掉中子束流装置时反应性的变化值,研究了不同材料的中子束流装置对反应堆临界的影响变化,实验结果可用于检验反应堆理论计算和孔道设计。
2.The subcriticalities of ADS model facility with water, Pb and stainless as buffer region are measured by the use of extrapolation period method.在ADS次临界中子学研究中,将次临界外堆法和超临界周期法相结合,实验测量了模拟ADS次临界装置中心布置不同缓冲区材料时的有效增殖因子keff和缓冲材料所相当的反应性。
3.The worth of neutron beam with different material was measured with extra-polation method and period method on the miniature neutron source reactor zero powerexperiment facility.在微型反应堆零功率实验装置上采用外推临界法和周期法,测量了在微型反应堆外添加或去掉中子束流装置时反应性的变化值,研究了不同材料的中子束流装置对反应堆临界的影响变化,实验结果可用于检验反应堆理论计算和孔道设计。
英文短句/例句

1.Precise Measurement of Period of Torsion Balance and the Study of "Abnormal Mode" in the Determining G;周期法测G中高精度周期拟合方法与"反常模式"研究
2.cyclic microbial recovery周期性微生物采油法
3.There is a statutory period of probation of thirteen weeks .有13周的法定试用期。
4.a calendar based on both lunar and solar cycles.基于日月周期的历法。
5.a calendar based on solar cycles.基于太阳周期的历法。
6.a calendar based on lunar cycles.基于月亮周期的历法。
7.A Brief Analysis of the Kings’ Land Proprietorship in the Western Zhou Dynasty西周时期周天子拥有土地法权的意义
8.Periodicity Detection Method of Periodic Pattern Mining in Time Series时间序列周期模式挖掘的周期检测方法
9.The court grant the company a two - week stay of execution.法庭准予该公司为期两周的缓期执行。
10.On the Basic Principle of Turnover Law and its Calculation;周转期法的基本原理与测算方法探讨
11.Teaching of Periodic Table of Elements;主族元素族序数的快速推断法——元素周期律周期表教学一则
12.Study on the Way to Integrate Life Cycle Assessment and Life Cycle Cost Analysis;生命周期评价和生命周期成本分析的整合方法研究
13.Optimization Approaches for Real Business Cycle Model within Finite Cycles在有限周期条件下实际经济周期模型最优化方法
14.Cannot calculate number of periods using the arguments provided.无法使用提供的参数计算周期数。
15.DaimlerChrysler said to oust CEO法官周二上午裁定佛州重计票期限
16.Make maintenance content, cycle and method.制定设备级别保养内容、周期、方法。
17.DaimlerChrysler said to oust CEO.法官周二上午裁定佛州重计票期限。
18.Achieve Cleaner Production by Life Cycle Assessment Method;运用生命周期评价方法实现清洁生产
相关短句/例句

periodogram method周期图法
1.Nonparametric estimation of power spectrum density(PSD) in vibration engineering, including the majorapproach as well as the periodogram method, is based on classical Fourier transformation(FT), but takes quite different forms.文章以周期图法为例,研究Fourier变换基本格式的不同对PSD非参数估计结果的影响。
3)periodic therapy周期疗法
1.[Objective] To observe the clinical effect of dysfunctional ovulatory sterility treated with TCM periodic therapy combined with Clomiphene.[目的]观察中医周期疗法配合克罗米酚治疗排卵障碍性不孕的临床疗效。
2.This paper presents a summary of the treatment of polycystic ovary syndrome and the research progress in the recent years covering various aspects such as syndrome differentiation and treatment of TCM, periodic therapy of TCM,combined traditional Chinese and Western medicine, effective mechanism and so on.从中医药辨证治疗、中医周期疗法、中西医结合疗法、疗效机理等方面综述近年多囊卵巢综合征的治疗和研究进展状
3.This paper presents a review the treatment of polycystic ovary syndrome and the research progress in the recent years covering various aspects such as syndrome differentiation and treatment of TCM,periodic therapy of TCM,combined traditional Chinese and Western medicine,acupuncture therapy,mechanism of therapeutic effect,and so on.从中医药辨证治疗、中医周期疗法、中西医结合疗法、针灸疗法、疗效机理等方面,对近年来多囊卵巢综合症的治疗和研究进展状况进行综述。
4)periodogram[,pi?ri'?d?ɡr?m]周期图法
1.Detection of Residual Carrier BPSK Signal Based on Periodogram;基于周期图法的残留载波BPSK信号检测
2.In order to reduce variance of power spectrum estimate using the perio-dogram,we use the smoothed periodogram to obtain the estimated spectral of the non-Gaussian to replace the true spectral,and process the signal to do generalized matched filtering under the loss of a constant false alarm rate.在估计功率谱时,为了减小周期图法谱估计产生的误差,采用平滑周期图法来估计非高斯噪声的功率谱,并在此基础上对信号进行恒虚警概率损失下的广义匹配检测。
3.In this paper, Power spectrum of CAP (carotid pulse) by periodogram and AR model is given, respectively.采用周期图法和AR参数模型法分别对颈动脉搏动波进行了功率谱分析。
5)measuring period method测周期法
1.Due to too much short sustained time duration of oscillation for the blades and too wide distribution of oscillation frequency over the audio frequency range, direct frequency measuring method, measuring period method and variable gate frequency measuring method were analysised,a procedure of variable gate frequency measurement has been applied to t.由于叶片振动持续时间很短 ,且振动频率在音频范围之内分布较广 ,通过分析比较直接测频法 ,测周期法和变闸门测频法后 ,在设计以单片机为核心的测频仪时采用了变闸门测频法 ,该方法具有精度高、速度快的优点。
6)turnover law周转期法
1.From the perspective of capital turnover,turnover law is one way of planning turnover capital based on the days of planning capital turnover according to the requirements of promoting the efficiency of capital circulation.从资金周转的角度看,存货资金定额核定周转期法是根据提高资金使用率的要求,以计划期资金周转天数,推算存货资金垫支额,从而进行规划的一种方法。
延伸阅读

周期图法  一种信号功率谱密度估计方法。它的特点是:为得到功率谱估值,先取信号序列的离散傅里叶变换,然后取其幅频特性的平方并除以序列长度N,即     (1)      (2)    由于序列x(n)的离散傅里叶变换X()具有周期性,因而这种功率谱也具有周期性,常称为周期图。早期的统计学者曾利用这种方法从大量的数据中寻找隐藏的周期性的规律。周期图是信号功率谱的一个有偏估值;而且,当信号序列的长度增大到无穷时,估值的方差不趋于零。因此,随着所取的信号序列长度的不同,所得到的周期图也不同,这种现象称为随机起伏。由于随机起伏大,使用周期图不能得到比较稳定的估值。一些学者对此作了改进。    为了减小随机起伏,M.S.巴特利特提出平均周期图法,即先把信号序列分为若干段,对每段分别计算其周期图,然后取各个周期图的平均作为功率谱的估值。平均周期图可以减小随机起伏,但是,如果信号序列不是足够长,由于每段序列长度变短,功率谱估值对不同频率成分的分辨能力也随之下降。另一种改进方法是将周期图与一个适当的频域窗函数相褶积,从而对周期图产生平滑作用,以减小随机起伏。加窗处理的结果虽然可以使随机起伏减小,但也会使周期图的分辨能力下降。    P.O.韦尔奇提出一种把加窗处理与平均处理结合起来的方法。先把分段的数据乘以窗函数(进行加窗处理),分别计算其周期图,然后进行平均。韦尔奇方法是较常用的一种计算方法。为了得到较好的功率谱估值,加窗和平均处理均应兼顾减小随机起伏和保证有足够的谱分辨率两个方面。    周期图法的优点是能应用离散傅里叶变换的快速算法来进行估值。对利用式(1)、(2)得到的功率谱估值进行傅里叶反变换,可以得到信号的自相关函数估值。这种方法适用于长信号序列的情况,在有足够的序列长度时,应用改进的周期图法,可以得到较好的功率谱估值,因而应用很广。    参考书目   A.V.Oppenheim and R.W.Schafer,Digital SignalProcessing,Prentice-Hall,Inc.,Englewood Cliffs,New Jersey,1975.