逆的

The main problem of direct toque control of a three-level inverter and control technique virtual synthesizing vectors based are demonstrated in detail, also, the method of vector selection is discussed materially.

深入阐述了三电平逆变器直接转矩控制的主要问题及虚拟合成矢量控制方法，详细讨论了三电平逆变器直接转矩控制中的矢量选择方案。

Through theoretical derivation, the author proved that the Landweber method is the transmogrification of the iteration solution of the generalized inverse, so the phenomenon that the reconstructed images of Landweber through many iterative processes is close to those reconstructed by generalized inverse method is explained, then a new reconstruction algorithm, namely pre-iteration method is presented, which divides the process of reconstruction into two steps, namely off-line pre-iteration and on-line one-step reconstruction.

通过理论推导，作者证明了Landweber法实际上可归于广义逆矩阵迭代求解的变形，从而解释了Landweber法多次迭代后，趋于广义逆解的现象。

Three structural positional forms of Baishugou Formation arestudied in the paper,the first structural positional form is wide distribution in the bottom of thesecondary grade thrust一detachment fault inner nappe,overlying thrusting sheet consisted of Lu-anchuan Group of Middle Proterozoic,the underlying strata are Taowan Group of Lower Palaeo-zoic,Baishugou Formation was regarded as bo...

本文研究了白术沟组的三种构造位态，确定其主要呈第一种构造位态广泛分布于推覆体内部某次一级逆冲滑脱断层的下部，其上覆逆冲岩席由震旦系栾川群及中元古界官道口群构成，下伏地层为下古生界陶湾群。

The study has completer the design of two-phase inverter and made up of the two-phase inverter-motor system for experimental use .

本项研究完成两相逆变器的设计，并组成了试验用的两相逆变器—异步电动机系统。

A series of basementinvolved thrust with highangle dipping to southern Tianshan dominate the contractional deformation in the basement. A miniscale imbricate wedge thrust system was developed in the footwall of basementinvolved thrust with a highangle dip, and a basementcored faultedanticline was developed in the hanging wall.

深层断裂变形以向山脉倾斜的高角度基底卷入逆冲断层为主干断层，断层上盘形成冲断隆起，次级断层相对较少，下盘则发育一系列同向倾斜的次级逆冲断层构成楔状叠瓦冲断构造。

The two big input equalizing capacitors were not need any more in this new inverter.

该逆变器是一种高效高可靠且体积小的性能优异的逆变器。

METHODS: The spiral modiolar artery in guinea pig cochlea was exposed by microsurgery, then the fluorogold or horseradish peroxidase was given around the SMA for retrograde tracing.

在正常豚鼠单侧耳蜗螺旋蜗轴动脉局部滴加逆行追踪剂辣根过氧化物酶或荧光金，观察双侧交感颈上神经节、星状神经节内HRP或FG逆标神经元的分布；采用逆标与免疫组化相结合的双重标记方法观察追踪阳性神经元是否表达酪氨酸羟化酶、神经肽Y、钙基因相关肽或P物质。

Methods: the spiral modiolar artery in guinea pig cochlea was exposed by microsurgery, then the fluorogold or horseradish peroxidase was given around the sma for retrograde tracing. the bilateral superior cervical ganglia and stellate ganglia were observed to find retrogradely labeled neurons. the neurotransmitters of these sympathetic fibers around sma were ascertained by using retrograde tracing combined with immunohistochemical double labeled technique.

在正常豚鼠单侧耳蜗螺旋蜗轴动脉局部滴加逆行追踪剂辣根过氧化物酶或荧光金，观察双侧交感颈上神经节、星状神经节内hrp或fg逆标神经元的分布；采用逆标与免疫组化相结合的双重标记方法观察追踪阳性神经元是否表达酪氨酸羟化酶、神经肽y、钙基因相关肽或p物质。

This paper proposes an off-line iterative algorithm based on signal reconstruction technique for generation of nonsinusoidal three-phase PWM waveforms.

在三相PWM逆变器中注入零序谐波电压分量是提高逆变器直流侧电压利用率的一种有效方法，提出一种基于波形重构技术的迭代计算方法，用以产生三相鞍形PWM波形数据。

In a two-step incubation experiment, high and low temperatures were combined with RH 70%, RH 80% and RH 90% to treat two silkworm races, Bibo x Dongtin and Chunlei X Zhenzhu, to investigate the causes for uhe occurrence of reversed silkworm in sericultural production and its hatching pattern.

针对生产上出现&逆出蚕&这一情况，通过催青实验调查发生逆出蚕的原因及其孵化方式。实验采用碧波×洞庭、春蕾×镇珠 2个蚕品种，分别在常温、高温与RH 70 %、RH 80 %、RH90 %组合的 6个条件下，进行两段式催青至孵化。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。