正弦

The calculation formula of the reactive power is concluded by means of the Fourier analysis method. The physical meaning of every item in formulaes is analysed. Finally the article analyses the influence of the reactive power in the nonsinusoidal condition on two primary reactive energy measurement technology. The analysis show that reactive power definition produces which in the standard IEEE100-1996, having a bigger deviation with two kind of reactive energy measurement technology to measure reactive energy.

本文采用傅立叶分析方法，导出非正弦电路的无功功率的计算公式，分析了公式中每一项的物理意义，并就非正弦无功对目前主要的两种无功电能计量技术（电磁感应式无功电能计量技术，电子式无功电能计量技术）的影响进行了理论分析，得出在IEEE 100-1996标准给出的无功功率定义下，用两种无功电能计量技术测量无功均会产生较大偏差的结论。

In this set of experiments, the cells were subjected to sinusoidally pulsing electromagnetic fields for three different frequencies (2HZ、15HZ、50HZ) and one intensity (5～ 8GS). It showed that they enhanced osteoblasts proliferative activity, especially in the group of 2HZ.

通过观察频率分别为2HZ、15HZ、50HZ的正弦波脉冲电磁场对成骨细胞的作用，结果显示三种频率的正弦波电磁场均能促进成骨细胞的增殖，其中以频率为2HZ者作用最明显。

Unlike "solid-state" frequency converters which convert your incoming 50Hz or 60Hz AC power to DC then chop it back up to output a synthesized AC sine wave, our TEMCo Frequency Converter MG Sets produce a sine wave in exactly the same way your utility generates it.

与&固态&变频器转换您接收50Hz或60Hz的交流电源，直流然后砍它备份输出合成正弦波交流电，我们坦科球蛋白集变频器产生正弦波绝对相同的方式产生的效用它。

Extracellularly recording the responses of dLGN neurons to sinusoidal gratings with different orientations showed that optimum orientations of dLGN neurons in trained cats, compared with that in untrained cats, did not shift in favour of the trained orientation. For cells with receptive fields located within 15°visual acuity away from the foveae, there are no difference in orientation bias and firing rate at trained orientation between the trained cats and untrained cats.

细胞外记录外膝体背核神经元对不同方位正弦光栅刺激的反应显示，垂直或水平方位正弦光栅信号训练的猫，与正常猫相比，其外膝体细胞的最优方位并未向着训练方位发生明显改变，对于感受野位于中央区15 度视角以内的细胞来说，其方位选择性强度以及在训练方位的发放强度与正常猫无明显差异。

The results show that hydraulic system, which performs sinusoidal and non-sinusoidal oscillation, oscillates smoothly and can obtain high oscillating precision.

结果表明，液压振动装置实现的结晶器正弦和非正弦振动，具有较高的振动精度，显示出其在结晶器振动方面具有明显的优势。

Milling machine, lathe, drill press, grinder, sparks machine accessories: universal dividing head, sub-dial, tilt angle plate, three-jaw lathe, four claw chuck alloy top, activities leading, single two-way Punch Former, and molybdenum wire , G word folder, UHT pneumatic tools, drill bits folder, wheel machines, grinding machines, degaussing devices, tools, Motorola, angle pads regulation, sinusoidal magnetic Units, sinusoidal regulation, Dresser, and Punch Grinding Machine, Plastic Punch , and the balance Units, such as the electrode rods.

铣床、车床、钻床、磨床、火花机配件：万能分度头、分度盘、倾斜式角度盘、车床三爪、四爪卡盘、合金顶尖、活动顶尖、单双向冲子成型器、钼丝、G字夹、UHT气动工具、钻头夹、砂轮机、磨针机、消磁器、工具万力，角度垫规、正弦磁台、正弦规，砂轮修整器，冲子研磨机、冲子整形器，平衡台，电极棒等。

Sinusoidal signal generator source file achieve sinusoidal signal generator, very useful and welcome to download.

详细说明：正弦信号发生器源文件实现正弦信号发生器，非常有用，欢迎下载。

This method sums a group of sinusoids to synthesize the speech signal, and the frequencies of these sinusoids are multiples of the fundamental frequency.

本算法采用叠加一组正弦波的方法来合成语音，这些正弦波的频率是基音频率的整数倍。

The AD2S1200 is a complete 12-bit resolution tracking resolver-to-digital converter, integrating an on-board programmable sinusoidal oscillator that provides sine wave excitation for resolvers.

AD2S1205是一款完整的12位分辨率跟踪分解器数字转换器，内置可编程正弦波振荡器，为分解器提供正弦波激励。

The article presents the developing condition of PWM and SVPWM first.Then the theory of SVPWM is discussed in detail.The SVPWM is based on the thought of magnetic chain tracking.It makes the ideal magnetic chain circle of three-phased sysmmetry electric motor supplied by three-phased sysmmetry sine wave voltage for basis,uses the practical magnetic chain vector formed by the different switch modes of three-phased inverter to track the basic magnetic chain circle.During the course of tracking,the inverter changes the switch modes properly to form the PWM waves.Then the modulation wave of SVPWM is analyzed in detail.The modulation wave of SVPWM is implicit,but the analogous modulation wave in A-B-C axis needs to be calculated in order to expose the internal relation of SVPWM and SPWM.That is to show the implicit modulation wave of SVPWM. SVPWM actually is a transformed SPWM ruly sampled by the modulation wave which is injected by the zero prefaces based on space vectors.

本文首先对脉宽调制技术的发展现状进行了综述，在此基础上分析了电压空间矢量脉宽调制技术的发展现状；接着对空间电压矢量脉宽调制技术的基本原理进行了详细的分析和推导，SVPWM是基于磁链追踪的思想，它以三相对称正弦波电压供电下三相对称电动机定子理想磁链圆为基准，由三相逆变器不同开关模式下所形成的实际磁链矢量来追踪基准磁链圆的，在追踪的过程中，逆变器的开关模式作适当的切换，从而形成PWM波；然后详细分析了电压空间矢量脉宽调制技术的调制波，虽然SVPWM法的调制波是隐含的，但是为了揭示SVPWM法与SPWM法的内在联系，需要求出SVPWM在A-B-C坐标系上的等效调制波，也就是将SVPWM的隐含调制波显化；SVPWM实质是一种基于空间矢量在三相正弦波中注入了零序分量的调制波进行规则采样的一种变形SPWM。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。