低功率

In this paper, the softmagnetic MnZn ferrite with high saturation magnetization and low loss in three groups ofvarious compositions have been developed by substituting Fe2O3 withrefined iron mine powders . Magnetic properties such as μi , Bs , Ps , Tc and fr were measured and analyzed.

用精铁矿粉制备功率软磁MnZn铁氧体的初步研究何玉平胡国光尹萍何玉平胡国光尹萍摘要：用精铁矿粉代替氧化铁研制了不同配方的高饱和磁感应强度Bs、低功耗的软磁性MnZn铁氧体。

To date, it has a rather poor power-to-weight ratio and is mechanically complex.

迄今为止，它有一个比较低的功率质量比而且机械复杂。

The microsecond response time of power semiconductors allows them to limit fault current to low levels, and consequently limit the system energy that must be managed (i.e. dissipated).

在功率半导体微秒的响应时间使他们能够限制故障电流保持一个较低的水平，从而限制了系统的必须加以管理的能量。

The unit adopts variable displacement hydraulic pump, hydraulic cylinder, movable pulley and broad belt to transmit power,has the charecteristics of abundant recovery and full use of power,minor fluctuation of electric motor load, low height of the unit, long stroke length and convinence of adjusting the stroke length and pumping speed, can realize the performance of being fast on the upstroke and slow on the downs...

该液压抽油机采用变量液压泵—液压缸—动带轮及宽胶带传递动力，具有功率回收利用充分、电动机负载波动小、整机高度较低、冲程长、冲程和冲次调节方便等特点，可实现上快下慢的工作状态，并具有失载与过载保护功能，是一种结构简单、重量轻、能耗少、载荷大的新型长冲程液压抽油机。

It is on nanosecond order. It is the second research achievement that study all-optics switching of low switching power.

研究含有掺稀土光放大器的低开关功率全光开关是我们的创新研究的成果之一。

The C-band magnetically insulated transmission line oscillator has teen simulated by the three dimensional PIC code in order to study the influence of non symmetry excitation mechanisms on its output modes. It is found that the non symmetry excitation mechanisms, such as random emitting of cathode electron anti the long rise tunic and low magnitude of input voltage, could product higher order modes and reduce output power.

为理解磁绝缘线振荡器实验中频频出现的模式竞争问题，利用3维全电磁粒子模拟程序对C波段MILO的实验模型进行研究，探索各种非对称激励机制对产生微波模式的影响，结果显示：阴极电子随机发射、电压的慢上升前沿、较低的电压等因素都可导致非对称高阶模式的产生，并使输出微波功率大大降低。

Products: Low ohmic precision and power resistors, SMD and conventional technology.

产品包括：低阻值精密电阻和功率电阻，SMD及传统技术产品。

To compensate for nonlinear distortion of RF power amplifiers, a novel adaptive digital predistortion method based on piecewise polynomial was proposed, and multiple lower-odd-order-only polynomials in the form of orthogonal coordinates were used for predistorter design.

为补偿RF功率放大器的非线性失真，提出一种新的基于分段多项式的自适应数字预失真方法，使用多个直角坐标形式的低阶奇次多项式设计预失真器。

In this way, the demodulation arithmetic and pulse compression of multi-channels can be packed into a single FPGA.To compensate the nonlinear effect of power amplifier, a successive overrelaxation iterative method of digital predistortion is applied here to ensure the low sidelobe performance, high output power and fast iterative speed.

分析了功放非线性对超低副瓣脉冲压缩信号的影响，基于射频功率放大器、矢量信号发生仪和矢量信号分析仪，采用松弛迭代法实现并优化了功放数字预失真算法，提高了迭代收敛速度与稳定度。

At present the main problem that the power electronic integration technology is faced with is how to make volume of module smaller, cheaper and more density of power, better capability of cooling, less parasitical parameter and applied in more situations. One of the main problems is the cooling of integrated module.

目前混合封装电力电子集成技术面临的主要问题是如何将模块的体积做的更小，成本更低，功率密度更大，传热性能更好，寄生参数更小及满足更多的应用场合，而其中最主要的一个问题就是集成模块的散热问题。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。