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design feature
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     On the Aesthetics Feature of Design
     浅谈设计的美学特征
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     The design feature of the embedded system
     嵌入式系统结构特点
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     In design, .
     设计过程中应用了.
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     To design the G.
     在设计G.
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     Feature:
     本文特色:
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The design feature of a direct-reading spectro-analyser with emphasis on the electronic circuit design is presented in this paper. This instrument is stable, speedy, and accurate. The first and second order spectral ranges are respectively 2000-6000 and 2000-3000 A. The mechanical construction of the optical system is so characterized that two (for first order) or four (for second order) pickups can be set exactly on the same spectral line. A line-frequency, high-voltage and high-energy spark source...

The design feature of a direct-reading spectro-analyser with emphasis on the electronic circuit design is presented in this paper. This instrument is stable, speedy, and accurate. The first and second order spectral ranges are respectively 2000-6000 and 2000-3000 A. The mechanical construction of the optical system is so characterized that two (for first order) or four (for second order) pickups can be set exactly on the same spectral line. A line-frequency, high-voltage and high-energy spark source system is employed with adequate sensitivity. The measuring system consists of a pulse amplifier, a rectifier, an integrator, and a pulse counter. The operation of this instrument is completely automatic after the mounting of the sample. Finally, typical operational data are illustrated.

本文介绍了一个直读式光谱分析仪,并对它的电路设计作了比较详细的报导。本仪器具有稳定、准确、快速等优点,适合于合金分析和单色光测定等的应用。波长范围是2000到6000。光学系统的特点在于所接收的同一单色光上可以放置2个(一级)或 4个(二级)测量线。光源激发系统采用和电源频率相同的高压高能火花放电,具有良好的灵敏度。自光电倍增管而下测量系统由脉冲放大、整流、积分和计数器等组成。除装卸样品和记录读数外控制系统的操作全部自动化,同时有高度的保安装置。最后介绍了几个典型的测试数据。

Interference always has an effect on system stability of the SCR inverter. The problem is so important that it has been gaining wide recognition. This article makes an analysis of the commutating process of SCR inverter for the reluctance-type power step motor and the cause for the SCR getting out of control. The design features of the jamproof trigger system and the electric circuits actually used are described. It has been shown in practice that the system stability has been enormously improved after...

Interference always has an effect on system stability of the SCR inverter. The problem is so important that it has been gaining wide recognition. This article makes an analysis of the commutating process of SCR inverter for the reluctance-type power step motor and the cause for the SCR getting out of control. The design features of the jamproof trigger system and the electric circuits actually used are described. It has been shown in practice that the system stability has been enormously improved after the jamproof trigger system is introduced.

本文分析了反应式功率步进电动机可控硅逆变器电路中的换流过程,阐明了可控硅失控的原因,提出了抗干扰触发系统的设计要点,并提供实际电路的范例.实践证明,采用抗干扰触发系统后,控制系统的稳定性有很大的提高.

Y-2 is the first light helicopter of China's own designs, with initial success in flight test. It was jointly designed and developed by Nanking Aeronautical Institute, Northwest University of Engineering and Factory № 331 to meet the reguirements of reconnaissance, Patrol and CommunicationThis paper makes a brief review of its development, giving information and analysis with special emphasis on the design features, ground tests, the major dynamic problems encountered and the approaches to...

Y-2 is the first light helicopter of China's own designs, with initial success in flight test. It was jointly designed and developed by Nanking Aeronautical Institute, Northwest University of Engineering and Factory № 331 to meet the reguirements of reconnaissance, Patrol and CommunicationThis paper makes a brief review of its development, giving information and analysis with special emphasis on the design features, ground tests, the major dynamic problems encountered and the approaches to them, And the results of flight tests.

Y—2是我国第一架自行设计并初步试飞成功的小型直升机。它由南京航空学院、西北工业大学和国营三三一厂共同研制,预定执行侦察,巡逻和通讯联络任务。本文简要地回顾了研制过程,着重就结构设计特点、地而试验、主要动力学问题的解决和初步飞行试验结果作了简单介绍与分析。

 
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