A new type of replaceable blade and adjustable pitch composite marine propeller was developed in this paper.
本文发展一新型的复合材料组合可变螺距螺桨，进行设计、制造、测试、分析及改良等工作。
The usage technique of radar for high-speed ship s to prevent collision in Three Gorges reservoir; 2. Research on Modeling and Simulation of High-speed Ship CPP Propulsion System; 3. Based on three typical high-speed ship (high-speed monohull ship, planning hydrofoil craft, wave-piercing Catamaran), a mathematic models of high-speed ship's propulsion system(common screw propeller, adjustable-pitch propeller, water-jet propeller) and intelligent control system are established the simulation with the help of Matlab/Simulink is realized.
以三种典型的高速船(高速单体船、翼滑艇和穿浪艇)为例，建立了其推进(普通螺旋桨、可调螺距螺旋桨及喷水推进)系统及智能控制的数学模型，并在Matlab/Simulink上实现仿真；建立了推进系统的优化数学模型，编制了优化算法(混沌算法、遗传算法和粒子群算法)程序，实现了智能推进系统的优化设计；最后，运用Matlab/GUIDE进行界面设计，编制了高速船智能推进系统仿真与优化软件，实现了良好的人机互动。
In order to improve the discrepancy of Ocarina, we used air window of whistle, air chamber of syringe together with the sound holes of Ocarina in making a sound adjustable Ocarina. The frequency spectrum was analyzed with computer sound fixing and ranging software and statistical software was employed to analyze the effects on pitch of area of sound hole and cubic of air chamber.
本研究为改良陶笛的缺失，利用哨子的气窗、针筒的气腔与陶笛的配孔式音孔结合，自创一种可调音的陶笛，并以电脑测音软体分析其频谱，利用统计分析其音孔面积与气腔体积对音高的影响。
As a part of a wind power system, the adjustable blade pitch wind turbine is the wind energy conversion facility, whose matching with wind energy of the wind farm has great influence upon the operating of the system.
变桨距风力机作为风能转换为机械能的设备，是风力发电系统的重要组成部分，它与风电场风能资源的匹配问题直接影响到了风力发电系统的运行特性。
This paper introduces how to solve the problem of measuring pitch of adjustable airscrew, while repairing it, with the special function of boring lathe, which requires to tap mechanical potentialities of the shipyard for this technical difficult problem.
文中介绍了修船厂挖掘现有机械设备的潜力，利用镗床的特有功能，解决调距桨修理过程中，螺距测量长期存在的工艺和实施方面的难度问题。
Measuring pitch of adjustable pitch airscrew with boring machine
利用镗床测量调距桨螺距
Research on intelligent control simulation of hydrofoil craft with adjustable-pitch propeller
水翼艇可调桨推进智能控制仿真研究
The fourth chapter in a single flute transfer history, as well as flute reforms forms after the bamboo flute modulation technique, and lists the chart, and " absolute pitch " and " adjustable pitch " combination, enables the reader to stick out a mile.
第四章释疑单个竹笛转调的历史沿革，以及竹笛改革形式后的竹笛转调技法，并列出图表，与绝对音高与调式音高相结合，使读者一目了然。
This is done with a simple machine that produces tones of adjustable loudness and pitch.
这是做了一个简单的机器，生产吨可调响度和音高。
The mixed flow field algorithm and performance investigation of adjustable-pitch horizontal axis wind turbine
可变桨距水平轴风力涡轮混合型流场算法与性能研究
Adjustable radius and pitch of the spiral structure is used in the new designed mixing machine.
混合装置在结构上采用双层双区变径变距式螺旋结构。
In the third chapter, the author put forward according to the three law of the law, put forward " objective pitch " and " adjustable pitch " and the important role of intonation in bamboo flute.
在本文第三章时，笔者提出了根据三种律的律差，提出了客观音高与调式音高以及在竹笛音准中的重要作用。
We have an adjustable pitch propeller.
螺旋桨是可变螺距。
PID control in adjustable-pitch wind turbine system based on BP neural network
基于BP神经网络的PID变桨距风电机组控制
The aim of numerical experiment of ram air turbines is mainly to simulating its adjustable pitch aerodynamic characteristic on the actual flight refuel conditions.
冲压空气涡轮流场数值研究主要目的是模拟在实际高空加油工作状态下涡轮变桨距气动特性。
Coordinate control strategy research of variable speed adjustable pitch wind generation set
变速变距风力发电机组整机协调控制策略研究
The fourth chapter in a single flute transfer history, as well as flute reforms forms after the bamboo flute modulation technique, and lists the chart, and " absolute pitch " and " adjustable pitch " combination, enables the reader to stick out a mile.
第四章释疑单个竹笛转调的历史沿革，以及竹笛改革形式后的竹笛转调技法，并列出图表，与绝对音高与调式音高相结合，使读者一目了然。
In the third chapter, the author put forward according to the three law of the law, put forward " objective pitch " and " adjustable pitch " and the important role of intonation in bamboo flute.
在本文第三章时，笔者提出了根据三种律的律差，提出了客观音高与调式音高以及在竹笛音准中的重要作用。
Double-fed VSCF generating is selected after a comparison among the fixed blade pitch scheme, the adjustable blade pitch scheme and the VSCF scheme, because it can capture the maximum wind energy by adjusting the blade pitch when the wind velocity is low and it can also ensure constant-frequency output, control stator active and reactive power respective by regulating the current input into rotor windings when the wind velocity is high.
本文致力于研究变速恒频风力发电技术，从分析其运行机理入手，比较了定桨距、变桨距和变速恒频风力发电的区别，选定双馈式变速恒频方案：它在低风速阶段主要进行变桨距调节追求最大风能捕获，高风速时通过控制双馈电机转子侧的电流，达到定子输出恒频和有功、无功的独立调节。