单相

Following are summary of our works:(1)The powders of LaCr_(0.9)Co_(0.1)O_3, LaCr_(0.9)Fe_(0.1)O_3, LaCr_(0.9)Ni_(0.1)O_3, LaCr_(0.95)Sn_(0.05)O_3 and LaCr_(1-x)Ti_xO_3(x=0.0-0.3) were single perovskite phase with orthorhombic structure. The gas-sensing properties of their thick film sensors were tested in the acetone, ethanol, normal propyl alcohol, carbinol and formaldehyde organic gases. The sensitivity of the sensors can not be enhanced effectively by doping Co、Fe、Ni、Sn elements in B-site of LaCrO_3. Ti dopant with proper concentration can greatly improve the gas-sensing properties, which make the sensor display higher sensitivity and quicker response-recovery characteristics.

所得结果摘要如下：(1)LaCr_(0.9)Co_(0.1)O_3、LaCr_(0.9)Fe_(0.1)O_3、LaCr_(0.9)Ni_(0.1)O_3、LaCr_(0.95)Sn_(0.05)O_3和LaCr_(1-x)Ti_xO(来源：ABfd1dC论文网www.abclunwen.com)_3(x=0.0-0.3)粉体为正交单相钙钛矿结构，其厚膜型气敏元件在350℃时对丙酮、乙醇、正丙醇、甲醇、甲醛等有机气体的气敏性能测试表明：0.1mol Co、Fe、Ni和0.05mol Sn元素在LaCrO_3的B位进行掺杂后，不能有效提高材料对以上测试气体的气敏性能；而Ti元素的适量掺杂可以极大地改善LaCrO_3的气敏性能，使之显示出对丙酮气体的高灵敏度和快速响应恢复能力。

In a single-phase circuit, the power is of a pulsating nature.

在单相电路中，功率具有波动的本性。

The three-rotor single phase variable voltage and speed motor possess the advantages of simple control, low price, and a wide range of variable speed, particularly good condition for heat scatter in lower speed running.

三转子单相调压调速电动机具有控制简单、价格低廉、调速范围宽等优点，尤其在低速运行下有较好的散热条件。

Active current separate method is detected in recent years for detecting harmonics and reactive currents in single-phase circuit.

有功电流分离法是近年来出现的一种单相电路谐波和无功电流检测新方法。

Simulation research on method for harmonic current detection of single-phase circuit based on instantaneous reactive power theory of three-phase circuit was presented.

提出了基于三相电路瞬时无功理论的单相电路谐波电流检测方法的仿真研究。

The simulation model of active current separating method is established with Matlab software for harmonic and reactive current detection in single-phase circuit.

针对单相电路谐波和无功电流检测的有功电流分离法，利用MATLAB软件建立仿真模型，就其中的低通滤波器对谐波电流检测效果进行了仿真分析。

For single phase solid solution Cu—Ni alloy, an apparent nucleation stage exists during its supercooling solidification, which is different from the traditional view combining nucleation into recalescence crystal growth.

3对单相固熔体Cu—Ni合金而言，其深过冷凝固过程中存在着明显的形核阶段，区别于传统观点将形核过程并入再辉阶段晶粒长大过程的看法。

The mature of pseudo-recalescence is the remelting of dendrites. This leads to apparent refinement of dendrite microstructures. Therefore the experiment support the viewpoint of dendrite remelting for microstructure refinement during supercooling solidification.②Under the condition of supercooling solidification, secondary recalescence cannot show up for single phase solid solution.

伪再辉现象的本质是枝晶熔断所致，由此引起伪再辉试样微观组织被明显细化，从而支持了深过冷凝固过程中组织细化的枝晶熔断说观点；②单相固熔体合金，在深过冷凝固条件下，不可能出现二次再辉。

A novel single-stage power factor correction circuit based on flyback converter is presented in this paper,.A single active switch is used to achieve a fast-regulated-output voltage, the reservoir capacitor voltage is clamped and efficiency is high.

本文提出了一种基于反激变换器的新型单相功率因数校正电路，电路只用一个有源开关就可以获得输出电压的快速调节，储能电容电压被箝位、效率高。

Single phase induction motor, three phase asrnchron/AUS induction motor, grinder, sander, scroll saw, dust collector.

8E53 8E55 单相异步电动机，三相异步感应电动机，砂轮机，砂带机，线锯机，集尘器。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。