1) virutence rate of mean
平均毒力频率
2) mean frequency
平均频率
1.
Simulation and mean frequency estimation on ultrasound seawater flow signals;
超声海流信号模拟与平均频率的计算
2.
Several mean frequency estimation methods for Doppler ultrasound signals have been introduced in this paper,then a new mean frequency estimation method based on Teager algorithm is proposed.
本文介绍了一些常用的超声多普勒信号平均频率估计法 ,并引入一种新的估计法 :基于Teager算法的平均频率估计 ,然后分别对计算机模拟的多普勒信号和流速校刻系统的多普勒信号进行平均频率的估计和比较 ,给出了不同估计方法的优缺点和适用范围。
3.
<Abstrcat>From molecular beam s speed distribution function,molecular beam s frequency distribution function is deduced,and calculates mean frequency,root-mean-square frequency and most possible frequency are calculated,and compared with corresponding characteristic quantities of speed distribution function one by one,and their physical significance are explaned.
从分子束的速率分布函数出发,推导了分子束的频率分布函数,求出平均频率、方均根频率和最概然频率,并与分子束的速率分布函数相应的特征物理量逐一比较,说明它们的物理意义,得出了用分子束的频率分布函数解决分子束问题更为简便的结论。
3) Average frequency
平均频率
1.
Complex correlation method for estimating average frequency of signal is introduced in this paper.
文章介绍了利用复相关估计信号平均频率的方法,并就其采样周期的选取与频率估计误差间的关系作了分析,最后给出最佳采样频率以及平均频率测量误差的实测结果。
4) virulence frequency
毒力频率
1.
The resistance of rice varieties to Magnaporthe grisea was identified and evaluated by the inter-organismal genetics method including the virulence frequency(VF),and the pathogenicity association(PA).
采用生物间遗传学关于毒力频率和联合致病性分析的方法,用67个稻瘟病菌菌株对35个水稻品种的抗瘟性进行了鉴定和评价。
2.
The resistance of hybrid rice combination to rice blast (Magnaporthe grisea) were identified and evaluated by combining the interorganismal genetics method about the virulence frequency (VF), and the analysis of the pathogenicity association (PA) such as resistance association coefficient (RAC) and virulence association coefficient (VAC) with the traditional method of differential cultivars.
用生物间遗传学关于毒力频率和联合致病性分析的方法,结合传统的鉴别寄主方法对广东省部分参加区试杂交稻组合的抗瘟性进行鉴定和评价。
3.
The strains population was virulent to all 30 rice blast monogenic lines,virulence frequency(VF)ranged from 17.
00%;病菌群体对所测定的30个抗瘟基因均表现出毒性,毒力频率为17。
5) virulent frequency
毒力频率
1.
V2,V5+6,V2+Talent,V2+Mid and V2+6 were lower in virulent frequency,so the resistant genes Pm2,Pro5+6,Pm2+Talent,Pm2+Mid and Pm2+6 could be used as resistant resources of wheat powdery mildew breeding.
经对黑龙江省不同地区小麦白粉病菌毒性结构和毒力频率研究表明,黑龙江省小麦白粉病菌具有基本相同的群体结构,其中V0、V1、V3a、V3b、V3c、V3f、V5、V5(Mli)、V7、V8为黑龙江省小麦白粉病菌的毒性基因,而V2、V5+6、V2+Talent、V2+Mid、V2+6毒力频率较低,因此,与之相对应的抗性基因Pm2、Pm5+6、Pm2+Talent、Pm2+Mid、Pm2+6,可作为黑龙江省抗小麦白粉病育种的抗源。
2.
The best one of the tested cultivars is Xuzhou174 with the virulent frequency of 333%.
抗性最好的品种是徐州174,毒力频率为33 3%,毒力频率低于60%的仅有百农64、徐州8697等7个品种。
3.
The virulent frequency of V1, V3a, V3b, V3c, V5, V7 and V8 were high (more than 50%), but that of V2, V4a, V4b, V2+6 and V21 were low (less than 5%).
小麦白粉菌毒性基因Ｖ１、Ｖ３ａ、Ｖ３ｂ、Ｖ３ｃ、Ｖ５、Ｖ７和Ｖ８毒力频率较高（＞５０％），Ｖ２、Ｖ４ａ、Ｖ４ｂ、Ｖ２＋６和Ｖ２１毒力频率较低（５％），Ｖ３ｆ、Ｖ５＋Ｍ１ｉ、Ｖ６和Ｖ１７毒力频率变化幅度较大（４４％～７４４％）。
6) mean power frequency
平均功率频率
1.
All of the enrolled patients undertook the Biering Sorensen test(BST) and the object-lifting test,a Finland made type ME3000P sEMG instrument was applied to record the electronic activities of paraspinal muscles(convex /concave) of all subjects,and the frequency domain indexes:median frequency(MF),mean power frequency(MPF),zero crossing rate(ZCR) were analyzed.
方法 AIS患者25例,男7例,女18例,年龄11～21岁;所有患者均执行BST实验、抬物实验,采用芬兰ME6000型表面肌电仪记录患者凸、凹侧椎旁肌表面肌电信号频域指标中位频率(MF)、平均功率频率(MPF)、过零点率(ZCR)。
2.
All of the enrolled patients undertook the Biering Sorensen test(BST) and the object-lifting test,a Finland made type ME3000P sEMG instrument was applied to record the electronic activities of paraspinal muscles(convex /concave) of all subjects,and the frequency domain indexes:median frequency(MF),mean power frequency(MPF),zero crossing rate(ZCR)were analyzed.
方法AIS患者25例,男7例,女18例,年龄11～21岁;所有患者均执行BST实验、抬物实验,采用芬兰ME6000型表面肌电仪记录患者凸、凹侧椎旁肌表面肌电信号频域指标中位频率(MF)、平均功率频率(MPF)、过零点率(ZCR)。
3.
Objective:The purpose of this study was to explore the independent role of central motor control in the alternations of sEMG mean power frequency during elbow flexion to extension transition.
目的:通过对主动肌和拮抗肌功能转变瞬间肌电平均功率频率的观察,探讨中枢控制因素在决定MPF变化中的独立性作用。
补充资料：平均停电频率
表征配电系统可靠性的重要指标之一。它表示一年内系统中的每个用户平均停电次数，用(次)/(用户·年)表示。这个指标能反映配电系统停运的严重程度和重要性。平均停电频率可用如下公式表达
由于系统中在一年里遭受停电的用户只是其中一部分，为了说明这些实际遭受停电的用户停运的严重程度，又引入了用户平均停电频率(CAIF)。它表示一年内系统中经受停电的用户的平均停电次数,用(次)/(用户·年)表示。用户平均停电频率可用如下公式表达
CAIF值对识别特定的配电系统可靠性的年度变化是非常有用的。
由于系统中在一年里遭受停电的用户只是其中一部分，为了说明这些实际遭受停电的用户停运的严重程度，又引入了用户平均停电频率(CAIF)。它表示一年内系统中经受停电的用户的平均停电次数,用(次)/(用户·年)表示。用户平均停电频率可用如下公式表达
CAIF值对识别特定的配电系统可靠性的年度变化是非常有用的。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条