查询词典 radio engineering

After the airdrop experiments of the system of the projectile and speed-down parachute, the balance velocity obtained from the optics apparatus on the ground、the balance spinning speed obtained from the gyroscope on the projectile and the image obtained from the infrared detector on the projectile are all used to simulate the six-dimension exterior trajectory of the projectile and identify the roll damping moment derivatives, and the identification can safely come to a conclusion that the absolute value of roll damping moment derivatives from the engineering calculation are on the low side.

对卷弧尾翼弹与减速伞系统进行空投试验，由地面光测系统给出平衡落速、弹上陀螺给出平衡转速、弹上红外探测器拍摄地面图像判断弹的姿态。通过六自由度弹道模拟，对弹滚转阻尼导数进行参数辨识，得到工程估算所得滚转阻尼导数绝对值偏小的结论。 5。对空投试验中出现弹姿态摆动现象，从受力分析及红外图像分析两个方面进行探讨，给出合理解释，并根据分析对弹外形进行修改，在后来的试验中收到很好的效果。

Based on a certain engineering development,this paper provides a kind of operation mode and corresponding data optimization method for the integrated navigation system composed of various navigation sensors (such as stabilizedgyrocompass,EN Log,LoranC,etc.).The optimized navigation in formation can effectivel satisfy the requirement of combat system on navigation information (especially on absolute velocity relative to the ground).

本文以某工程型号任务为背景，提出了一种基于平台罗经、电磁计程仪及LoranC定位系统等导航传感器的综合导航系统的工作模式及数据优化处理方法，经优化处理后的导航信息可有效地满足作战系统对导航信息的需求。

However, it is proved during engineering practice that the adhesion between the layers of the pavement structure is poor, the adhesion quality is between absolutely slippery and whole continuous, and the interface transfer force by contact.

然而，工程实践证明，沥青混凝土层与水泥稳定层之间以及沥青混凝土层之间的层间界面粘接比较薄弱，处于完全滑动与完全连续的中间状态，层与层之间通过接触传递应力。

So the theory to the application of rod string absorber in engineering is provided.

本文的定量研究为抽油杆减震器在工程中的应用提供了理论支持。

In order to improve the power quality of distribution network system, one of the most effective methods is reactive power compensation. In this paper, the Distribution Static Synchronous Compensator for reactive power compensation was studied, and then the digital controller based on One-cycle control was designed. The waveforms of experimental device based on DSTATCOM of one-cycle control were given in this paper. It can be seen from the results that the fluctuation of DC capacitor voltage is lower, the dynamic response speed of DSTATCOM providing or absorbing reactive power is fast, and the accuracy of steady-state compensation can achieve the requirements of reactive power compensation in engineering basically

为了提高配电网系统的电能质量，对无功功率进行精确补偿是非常有效的方法之一；本文研究了配电网静止同步补偿器用于无功补偿，并设计了单周控制的数字控制器；文中给出了基于单周控制的DSTATCOM无功补偿试验装置工作过程中的波形曲线，从试验结果可见，本文设计的单周控制DSTATCOM无功补偿装置的直流侧电容电压在工作过程中波动较小，装置发出或者吸收无功功率的动态响应速度较快，稳态补偿精度基本能够达到工程中无功补偿的要求。

Based on abstract algebra theory, an architecture-mapping based model transformation approach considering about both the syntax and the semantic characteristics of modeling elements is proposed from the viewpoint of software engineering implementation.

从软件工程的实施出发，以抽象代数理论为基础，同时考虑建模元素的语法结构和语义特性，该文提出了一种基于体系结构映射的、可支持模型间自动转换的方法。

Studies on the Innuence of PAs on Postharvest Physiology of banana An Guangiie (Department of Food Science and Engineering, South China University of Tropical Agriculture, Danzhou, Hainan, 57l737) Abstract The category, quantity and distribution of PAs in banana fruit were investigated.

本研究以巴西香蕉为实验材料，分别测定了果皮与果肉中所含主要多胺的种类、分布及其变化，同时，就内、外源多胺在常温（28℃）及冷害温度（5 ℃）下对采后香蕉生理的影响进行了较为系统的研究。

ABSTRACT Aircraft design is a complex system engineering that plays a core role in aeronautical science and technology.

飞机设计是一项在航空科学技术中有着核心性作用的复杂系统工程。

ABSTRACT Many complex systems exist in nature and modern society, such as in engineering, living beings and society economy.

现代社会日趋信息化、系统化，在工程技术、社会经济、生物生态等各领域出现了许多复杂的大系统。

ABSTRACT Complex fluid flow and heat/mass transfer problems encountered in engineering are characterized by geometric and/or dynamic complexity.

在许多工程部门中所遇到的复杂流动和传热传质问题包括几何形状的复杂性和动力的复杂性。

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。