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This thesis compares the characteristics of secondary batteries used for the underwater system in order to find a proper power source that is suitable for the system. Moreover, the low-cost integrated circuit and buck-type converters are used to obtain the required voltage levels for the devices in the system such as the underwater acoustic modem, single board computer and vertical line array hydrophone with condition amplifiers.

中文摘要本文针对常用於水下遥测系统之二次电池进行特性比较，以选用适合作为其电源之电池，再将电池输出电压经低成本之类比IC与降压型转换器转换至符合本系统设备如水下数据声传器、水下遥测单版电脑与垂直阵列麦克风讯号放大器等所需之电压等级。

Computer simulation is a very useful approach to predicting sound propagation and obtain acoustical information in design process.

室内声场计算机模拟为厅堂音质的设计和研究提供了新的方法。

The advantage of this process is to directly obtain acrylate through catalytic reaction of acetic acid and methanol.

本技术以煤化工基础原料合成气的基础产品醋酸和甲醇，经过催化反应合成丙烯酸，工艺技术的特点是可直接获得丙烯酸或丙烯酸酯。

Finally, Based on the whole research work, a new technology, named"ultimate recycle operation"was proposed. The main purpose of this technology is to obtain the maximum selectivity of acrylonitrile and it is of great importance on conservation of resources and environment protection.

最后，在全文研究工作的基础之上，本文提出一种"极限式循环操作"反应技术的设想，利用该反应技术能够最大限度地提高丙烯腈的选择性，降低深度氧化产物的生成，在节省资源和环境保护等方面均具有突出的应用意义。

This method can obtain high compression rate and high speed. At same time this method based on integral action, so it is easy to be realized by hardware..

该法能得到较高的压缩倍数和快的运算速度，同时该方法全是基于整数运算，硬件实现较容易，详见第六章。

Based on ship's mathematic model of collision avoidance,we produce the optimal opportunity and action taken of collision avoidance,and obtain a graph of action-taking and a curve of the change of the course .

从数学模型出发，得出避碰行动曲线图和航向改变率随相对距离的变化曲线，给出确定船舶最佳避让行动与时机。

First of all, based on the aid of AIS (Automatic Identification System), which can give us the target ship's accurate data and will implement in 2002, we study own ship's relative motion to target vessels, define DCPA and its sign, give mathematic model of collision avoidance, produce the optimal opportunity and action taking of collision avoidance, and obtain a graph of action-taking.

论文首先在2002年将要开始实施的船舶自动识别系统所能提供的准确目标船信息的基础上，研究本船相对于目标船的运动，定义DCPA的大小和符号，推导出船舶避碰数学模型，给出船舶最佳避让行动与时机，得出避让行动曲线图，并且明确最佳避让行动时机不是某个点，而是一个时间段。

The aim of learning Bayesian networks is to determine a directed acyclic graph to obtain the causal relationships among variables.

Bayes网络结构是一个有向非循环图，它的边都是有向边，但不存在由有向边构成的环路。

The model of the embedded system was constructed by directed acyclic graph to obtain the objective function for hardware/software partitioning.

首先，使用有向无环图对嵌入式系统建模，得到软硬件划分优化系统的目标函数。

In addition, the Government can obtain from the sale of land in the high income, for the hot real estate is often happy to add fuel to the flames the government's.

此外，政府可从出售土地中高收入，对房地产热往往是乐于推波助澜政府。

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。