查询词典 equal ratio

This thesis mainly discuss following issues, Theory and simple expressions for array covariance matrixes are derived when angular spread functions are symmetric distribution functions, i. e. the Uniform distribution, the Gauss distribution, the Laplace distribution and the Von Mises distribution, and a non-symmetric distribution function, i. e. the Gamma distribution. And the relation between the effective signal subspace and the array number, or and the nominal angle of the distributed source, the angular spread, the distributed functions, and the Signal-to-Noise Ratio is gained. The dimension of the effective signal subspace increases with increment of the array number. And it is more obvious to the non-symmetric distribution. The dimension of the effective signal subspace decreases with increment of the nominal angle. And the distributed source is equal to a point source as θ=π/2. The dimension of the effective signal subspace increases with increment of the angular spread.

本论文针对阵列信号处理中广泛存在的分布源现象，主要讨论了以下问题：推导了角度分布函数分别为对称的均匀分布、高斯分布、拉普拉斯分布、Von Mises分布和非对称的伽马分布时，分布源阵列接收信号协方差阵的严格模型和简化模型，得到了单个分布源的有效信号子空间随阵元数、分布源中心角、分布角、角度分布函数和信噪比的变化规律：随着阵元数的增加，对所有角度分布函数的有效信号子空间维数也随着增加，且非对称分布函数的有效信号子空间充满整个空间的可能性更大；随着分布源中心角逐步增加，有效信号子空间维数逐步减小，当θ=π/2时，等价于点源情形；随着分布源分布角逐渐加大，有效信号子空间维数也随之增加，直到有效信号子空间充满整个空间；随着信噪比的增加，有效信号子空间维数有一定程度的减少。

The new antigen P3 peptide which harvested from the 430A peptide synthesizer were verified by the mass spectrograph and HPLC, that the ratio of mass/charge of the synthetic peptide was equal to the molecular weight in theory and its purity was above 95%. The Western blot analysis show that the antiserum induced by the new antigen plus hemocyanin could bind with the 22KD and 55KD proteins, which were existed in the testis tissue protein of mouse, rat and human.

一、经抗原分子设计，在430A自动肽合成仪上合成的新抗原P3，经质谱仪分析证明其荷质比与理论一致；纯化后，其纯度大于95％；将新抗原与KLH偶连后免疫小鼠，经Western blot证实其诱导的特异性抗体可识别小鼠、大鼠、人睾丸组织中分子量约为22KD和55KD左右的蛋白质。

The ratio C is difference between target value and distractors values divided by distractors values. Three hypotheses are as follows:(1) A function of slopes to C absolute values is monotone decreasing function.(2) Slopes are equal when C values are same.(3) If C absolute value is bigger than Cp absolute value, searching for a target is parallel search, or is serial search.

为了解决上述问题，笔者引入目标值和干扰子值的差值与干扰子值的比值C，提出了以下三个假设：（1）目标搜索斜率对C值绝对值的函数是单调递减函数；（2）当C值相同时，其目标搜索斜率应相等；（3）当|C|〓|〓|时，目标搜索是平行搜索，否则为系列搜索。

The1Hz~lMHz input measured pulse signals of the digital frequency meter can be used for measuring frequency, period, pulse width and duty ratio,etc.The test results stably display 3 seven-segment numeric tubes, and the measuring ranges may be switched over automatically. The measuring error is equal to or less than 0.1％.

该数字频率计的lHz～1MHz输入被测脉冲信号具有频率测量、周期测量、脉宽测量和占空比测量等多种用途；其测试结果由3只七段数码管稳定显示，测试量程可自动切换、测量误差小于等于0.1％。

A new dimensionaless parameter, called the threshold-crossing intens ity, is defined as a measure of the threshold-crossing severity, which is equal to the ratio of the product of average number of crossing events per unit time a nd mean threshold-crossing duration and amplitude over the threshold.

定义了一种度量过阀严重程度的新指标，称为"过阀强度"，等于单位时间过阀平均次数、平均过阀延续时间和平均过阀幅值三项乘积与阀值之比。

In 333 detected copies of weanling pig ,the number which swine fever antibody level of serum is less than or equal to the ratio of 1 to 8 is 123,and the immunity percent of pass is 62%.

断奶仔猪检测 333份，猪瘟血清抗体水平≤ 1∶ 8的有 12 3份，免疫合格率为 6 2 %。

The results are as follows:In all the detected copies,the number which swine fever antibody level of serum is less than or equal to the ratio of 1 to 8 is 267,and the immunity percent of pass is 75.5%.

哺乳仔猪检测 10 7份，猪瘟血清抗体水平≤ 1∶ 8的有 34份，免疫合格率为 6 8%。断奶仔猪检测 333份，猪瘟血清抗体水平≤ 1∶ 8的有 12 3份，免疫合格率为 6 2 %。育肥猪检测 34 0份，猪瘟血清抗体水平≤ 1∶ 8的有 94份，免疫合格率为 72 %。

In this study, we try to provide the examples of the application of mathematics to music; the application of golden ratio to musical structure; the calculation and derivation of Pythagoras scale、pure scale and twelve-tone equal temperament scale; the application and analysis of mathematics in fifth-degree co-generation method; and the two-dimension research of the interval and scale. These discussions apparently show the strong correlation of mathematics and music.

本文藉由数学与音乐的多元对话，探讨音乐领域中数学的应用范例；黄金比例在乐曲结构之应用；运用数学推演和计算毕氏音阶、纯律音阶和十二平均律音阶的组成；探讨五度相生律的应用范例与数学的密切关系；归纳和分析音程和音调的数学二元图表，在在都显示出数学与音乐密不可分的关系。

The ball on the V-shaped incision can be adjusted to achieve a very high ratio, and provides an equal percentage flow characteristics.

在球上的V形切口可以实现很高的可调比，并提供一个等百分比的流量特性。

In traction drive continuously variable transmissions,the spin velocity is almost equal to zero for a given constant driving ratio.

牵引式无级变速器的传动零件间处于点接触状态，在某一传动比时，相对自转速度为零。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。