second control

In this paper, the Mach number control system in NF-6 wind tunnel is introduced, especially in detail for the compressor rotary speed control sub-system, the compressor stator vane control sub-system and the second throat control sub-system. angle.

笔者介绍了NF6风洞马赫数控制系统的组成、特点及运行方式，对转速控制子系统、压缩机静叶角控制子系统、二喉道栅指控制子系统等进行了较为详细的介绍。

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The first part is divided into tangible assets control and intangible assets control. The second part is divided into market share analysis on foreign capital and channel control.

第一部分又分为对有形资产和品牌、技术、人才等无形资产的控制，第二部分分为对外资市场占有率的分析和渠道控制，第三部分为对三项主要影响的分析介绍。

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By comparison with control, after planting legumes in two consecutive years, soil organic matter was increased by 15.6% in the first year and 9.1% in the second year, and soil pH was decreased by 0.16 in the second year.

与休闲相比，种植和翻压豆科绿肥后，第一年和第二年小麦播前土壤有机质分别提高15.6%和9.1%，pH在第二年降低0.16。

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To eliminate the chattering of variable structure control ( VSC) in missile servo system for attitude control, the control law was expanded from second-order to n order on the basis of status trace and variable plane included angle.

为消除导弹姿态控制伺服系统变结构控制中的抖振，在状态轨迹与滑动平面夹角变结构控制律的基础上，将原来的二阶系统扩展为n阶。

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The second principle is to loosen the control that providers of on-line services have over data and give more to those who supply them ．

第二个原则是放宽在线服务提供商对数据的控制,并将更多的数据提供给那些提供数据的提供商。

高考真题- 2017 江苏 阅读C

Non-singular terminal sliding mode control for a class of second-order nonlinear uncertainties system

一类二阶非线性不确定系统的非奇异Terminal滑模控制

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A model tracing variable structure control methodology based on nonsingular terminal mode for second-order uncertain systems is proposed. Using this method, BTT roll channel autopilot is designed.

进一步提出基于非奇异终端滑模的二阶不确定系统的模型跟踪变结构控制方案，并将其应用于BTT导弹滚转通道的自动驾驶仪设计。

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Analytical Solution to Optimal Control of Second Order Systems Under Fixed Terminal and Destination Function

特定条件的二阶系统的最优控制解析解

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Second, it analyses the relation between the sag and the tension of the loose side chain at the head end unit of AFC, upon which the control system circuit was designed and the experiments was made.

其次分析了机头链轮松边链条的悬垂量与张力的关系，并在此基础上设计了控制系统电路并进行实验；

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HACCP system of smoked and cooked sausage processing was established. The critical control points were choice and receiving of material meat, repair, the second whipping, smoking and cooking, cutting, the second sterilization and checking of final products.

建立了低温熏煮香肠的HACCP体系，其中关键控制点为原料、修整、搅拌、熏煮、剪节、杀菌和成品检验。

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