查询词典 linear switching

He proposed using a system called "distributed adaptive message block switching", known today as packet switching.

他建议使用一种系统，称为"分布式适应消息字组交换"。即今天的分组交换。

One region having a first switching speed may be for colour mode display and the other region having a second switching speed different from the first may be for monochrome mode display.

具有第一切换速度的一个区域可以用于彩色模式显示，并且具有不同于第一的第二切换速度的另一个区域可以用于单色模式显示。

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 magnitude of sliding mode switching gain is the key reason causing system chattering. Self-recurrent wavelet neural networks is used to estimate sliding mode switching gain on-line, which can reduce chattering caused by sliding mode control effectively.

滑模开关增益的大小是造成系统抖振的关键，采用自回归小波神经网络(Self-recurrent wavelet neural networks， SRWNN)在线估计滑模开关增益的大小可以有效降低滑模控制造成的抖振。

This paper puts forward a novel DC link parallel resonant soft switching technology. It mainly analyses the topology, working principle of the soft switching inverter. Finally it validates its theory and feasibility through experiment.

该文提出一种新型的直流环节并联谐振软开关技术，重点分析了此种软开关逆变器的拓扑结构、工作原理和特点，并通过实验验证了其原理和可行性。

Firstly, this paper analyzes and summarizes the research situation of resonant soft-switching technique and main topologies. And it indicates the main advantages and disadvantages. Then it pays more attention to analyze the parallel resonant DC link circuit theory and operating modes. It also analyzes how the resonant circuit realizes the resonant process. This paper also simplifies the control part design of the parallel resonant DC link soft-switching inverter by DSP.

本文首先对谐振软开关技术的研究现状和各种主要的拓扑结构进行了分析、综合、总结，指出了各自的优缺点；着重对并联谐振直流环电路的工作原理、电路工作模式、软开关实现机理及谐振参数的确定等进行了深入详尽的分析；利用DSP的灵活调节特点，有效地简化了并联谐振直流环软开关逆变系统的控制环节设计。

These methods can make use of redundant switching status in order to make capacitors of different cells connect in parallel and to make energy transfer between adjacent cells in different switching status. Carrier phase-shifted PWM methods are further studied.

最后，本章提出了载波移相PWM方法对于新型拓扑的特殊意义，即采用移相控制，充分利用新型拓扑的各种开关冗余状态，通过变流器各级单元电容之间的并联状态补充能量，可以有效改善基波周期内各级单元的电容电压平衡问题。

The voltage peak and switching loss during switching of inverter is the main cause that due to the damage of IGBT.

逆变桥电路开关过程中出现的电压尖峰和大的开关损耗是导致主开关器件IGBT损坏的主要原因之一。

By using this method,9 switching states were ensured during a sampling period of the matrix converter,and the duration of each switching st...

实验结果表明，采用提出的空间矢量脉宽调制优化调节策略，不仅消除了输出电压中的错误脉冲，而且降低了输出电压的总谐波畸变率，在输出频率为15Hz时，THD降低约15%，有效地提高了矩阵式变换器的输出波形质量，保证了系统的安全可靠运行。

As the communication net work of which it is based is changing from circuit switching based ISDN and DDN to packet switching based IP network, the object market will change from large cooperation and government to little work group and personal desktop conference, and finally to family, the function has developed from the simple Video Conference to integrated services such as remote learning system, remote monitoring system and remote medical system etc, video conference will be in a new development generation.

顺应三网合一的发展趋势，由于交互式多媒体通信所依附的传输网络基础，由电路交换式的ISDN和专线网络向分组交换式的IP网络过渡，针对的市场目标将由大型公司、政府机构的会议室向小型化的工作组会议室、个人化的桌面延伸，并最终发展到家庭，功能也已由原先单纯的电视会议功能发展成远程教学系统、远程监控系统、远程医疗系统等多方面的综合业务。

The dissecting of samples in group2 were difficult. The root of pulmonary artery and ascending aorta failed to be unfolded because fibrous tissue was tough, right and left fibrous trigone were too firm to be solved by hand. Cardiac muscle fibers couldn't be stripped along myofibrillar trajectory since they were prone to break because of their friability.

组2的心脏解剖困难，表现为纤维组织坚韧，游离肺动脉非常困难；徒手无法松解左、右纤维三角，肺动脉和主动脉根部的游离非常困难；心肌纤维坚硬、质脆，解剖时容易断离成碎块，无法沿纤维走行方向剥离。

We have battled against the odds in a province that has become increasingly violent.

我们对在一个争夺日益激烈省的可能性。