| 1. | Experimental study on moment modulation of prestressed frames
后张有粘结预应力混凝土框架弯矩调幅的试验 |
| 2. | The error probability of binary am is greater than for binary fm by a factor of at least 6
二进制调幅的误差概率比二进制调频至少大5倍 |
| 3. | The parallel strategy is presented which is based on phase synchronizing and amplitude modulating
然后本文提出基于同步调幅的逆变器并联控制技术。 |
| 4. | Although there is no limit on the number of clicks you can make on the ad banners , there are certain standard parameters universally recognized throughout the internet business
虽然我们没有限制你点击广告调幅的频率，但在互联网上有被认可的标准的参数。 |
| 5. | Then the proportion of the modulation of moment taken by the second moment in the total modulation in prestressed frame is less than that in prestressed beam
同时，次弯矩调幅占总调幅的比重在框架中要远小于连续梁。因此，次弯矩协助调幅的作用在框架中也弱于在连续梁中。 |
| 6. | The spwm algorithm using symmetrical sample in this controller , can alter its frequency and amplitude . the good performance of the bldc motor controller using dsp is verified by the experiment
本文在分析了几种spwm调制方法的基础上，将基于对称采样法的spwm调制算法应用于本设计中，产生了可调频调幅的正弦波脉宽调制信号。 |
| 7. | In an am transmission the carrier wave is constant in frequency and varies in amplitude ( strength ) according to the sounds present at the microphone ; in fm the carrier is constant in amplitude and varies in frequency
在调幅的传播中，其负载电波频率是恒定的，但波幅(力度)随着麦克风声音变化而变化；在调频的传播中，其负载电波波幅是恒定的，而频率随着麦克风声音的变化而变化。 |
| 8. | At first , this thesis analyzes the main causes in theory , which have effects on the redistribution of internal force and modulation of moment for the bonded post - tensioned partially prestressed concrete frame ( for short prestressed frame ) , including the relative height of compressive zone of section ( ) , secondary moment and types of load applying . then , this thesis analyzes the test of prestressed frame . then , a method , called curvature - force method , for nonlinear analysis of prestressed frame is put forward
本文首先从理论上分析了影响后张有粘结部分预应力混凝土框架（简称为预应力框架）内力重分布和弯矩调幅的主要因素，即相对受压区高度、次弯矩和加载方式等，并初步分析了两榀只加竖向荷载和两榀既加竖向荷载又加水平荷载的单层单跨预应力框架静力加载的试验。 |
| 9. | Based on the experimental study of two presstressed frames , it analyses the question of redistribution of internal force and analyses influence of moment modulation of prestressed frames . therefore , it draws some conclusion as follow : 1 ) post - tensioned prestressed frames can be practiced on moment modulation . but how to operate decides on practical situation in design
本文通过对两榀近于足尺的后张有粘结预应力框架在跨间竖向荷载作用下的试验研究，探讨了预应力框架内力重分布问题，从塑性内力重分布入手分析了次弯矩对框架弯矩调幅的影响以及影响内力重分布的其他主要因素，得到一些概念性的认识和结论： （ 1 ）对后张有粘结预应力框架可进行适当调幅。 |
| 10. | At last , with the program , 18 one - storey and one - span prestressed frames are simulated . some conclusions are reached with the taking into account the , secondary moment and types of load applying : ( 1 ) the in the beam affects the ductility of the section and rotary property of the plastic hinge . so total coefficient of the modulation of moment becomes less with the becoming bigger
最后，本文利用编制的非线性程序，模拟了18榀单层单跨预应力框架，重点研究截面相对受压区高度、次弯矩、加载方式对塑性内力重分布和弯矩调幅的影响，从中得出了以下主要的结论和规律： ( 1 )框架梁相对受压区高度在很大程度上反映了截面的延性，体现了塑性铰的转动能力，框架的总弯矩调幅系数随着相对受压区高度的增大而减小。 |
