初步设计

The research purpose of this paper is to analysis the flight dynamic performance for unmanned aerial vehicle without empennage and to evaluate its operation and stable performance. Then offer some reference to design and development.

本文的研究目的是对无尾式无人机的飞行动力学特性进行分析研究，初步评价其操纵与稳定性能，从而为飞机的设计与研制提供一定的参考。

And on the basis of research on AHIG\'s WebPages intelligent search engineer,I constructed an preliminary AHIG\'s WebPages intelligent search engineer and an experimental system of WebPages automatic indexing and classification of agricultural history subject,achieved concept search for agricultural history WebPages.

同时，在对农史门户网页智能搜索引擎设计和研究的基础上，初步构建了农史门户网页智能搜索引擎和农史网页自动标引与自动分类实验系统，实现了农史网页的概念检索。

At last, the paper designs the hard and soft realization of the whole control system primary which is based on direct-current control method and lists its hard principle and software flow charts. It can be referenced by the exploders of the practiced equipment.

最后，文章对基于直接电流控制方法的变流电路的控制系统的软硬件实现做了初步的设计，列出了控制系统硬件原理图和主要软件流程图，可作为今后实际装置开发的参考。

This article in the collection analyzes the domestic and foreign high speed roller bit bearing research pertinent data in the foundation, in view of the present high speed roller bit bearing in the field application existence's question, through to the roller bit bearing main failure mode and the reason analysis, found the extension roller bit service life the theory basis, uses the method which the theory and the experiment unified to develop to the roller bit bearing surface strengthening technology as well as the bearing enclosure system's preliminary study, has provided a new mentality and the method for roller bit's design, further impelled the modern well drilling processing technology the development.

本文在收集分析国内外高速牙轮钻头轴承研究有关资料的基础上，针对目前高速牙轮钻头轴承在现场应用存在的问题，通过对牙轮钻头轴承主要失效形式和原因的分析，找到延长牙轮钻头使用寿命的理论依据，采用理论与实验相结合的方法开展了对牙轮钻头轴承表面强化技术以及轴承密封系统的初步研究，为牙轮钻头的设计提供了一条新的思路和方法，进一步推动现代钻井工艺技术的发展。

ASUS managed to find a perfect balance of eye-pleasing design, good functionality and performance and didnвt introduce any big changes since the initial release of this model.

华硕终于找到了完美的平衡，眼睛外型设计，良好的功能和性能上didnвt引进什么大的变化，因为初步释放这种模式。

Given the principle structure of machanism and electric control for wheel transport powder feed unit. Designed the wheel antrum,wheel and other key parts firstly. Made primary experiment to prove that the blue print is feasible.

给出了粉轮式结构的送粉器的机械和控制系统原理框图，优先设计制作了粉轮腔、粉轮等关键部件，做了初步验证实验，证明了方案的可行性。

In this dissertation, the modern engineering technology was introduced into the planting of ginseng, studied the distribute intelligence control system of greenhouse, in which ginsengs would be planted.

系统上位机采用Visual Basic 6.0编写程序，设计出简单实用的界面，并实现串口通信，能够显示、存储、查询现场数据，对数据进行分析、处理，并做出正确决策传送给下位机；下位机软件采用汇编语言编写，实现的功能包括：对传感器采集到的环境信息的初步处理，把整理后的数据发送给上位机，根据上位机下达的指令或者自身的控制规则驱动执行机构调节温室环境。

In this paper, the change of the hydraulic grade line in the earth dam and the gradient ratio are discussed when the water level falling, which offer feasible and appropriate references for the design and run and administer of reservoir.

通过本文的研究，初步探讨了水库水位下降过程中，坝体内自由水面线最高点的变化以及上游出渗处渗透坡降的变化，旨在为土坝的设计和运行管理提供切实可行的依据。

How to acquire the opposing terminal, initiate optical beam link and hold security communication is one of the most important question of optical space communication.

本文以空间光通信终端的研究为背景，从APT系统运算与控制部份的软件编制入手，对APT系统的软硬件集成进行了初步的分析、设计与开发。

The present objective is to evaluate the possibility of installing pump jet on fishing vessels, including simulation of flow field near the pump jet, comparison with traditional propeller on issues of tangling, and life-cycle cost for typical Taiwanese fishing methods.

本研究目标是评估泵喷推进器用於渔船上的可行性，包括泵喷推进器出入口流场模拟、泵喷推进器与传统螺桨绞缠性能的比较、台湾渔船使用情形下成本效益之评估，也针对一般的台湾渔船，进行改用泵喷推进器的初步线型与安装设计并比较其静水性能与稳度影响。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。