This paper studies numerically of the transient heat transfer characteristics of building envelope impregnated with phase change material.
由于空调系统各设备的作用是产生和输送一定数量的冷量或热量，各设备的电耗有一个比较合理的比例范围。
The startup time of the SRO is locked by a loop composed of a voltage-controlled SRO, an efficient envelope detector, and an accurate charge pump, which is similar to a phase-locked loop without input clock.
这一超再生振荡器的起振时间被由超再生振荡器、高效率包络检波器和高精度电荷泵等构成的类似于锁相环的环路锁定在某一固定状态上。
The circuit is connected and disconnected between a main microprocessor signal controlling sensor and an impedance matching network, wherein the impedance matching network is connected with a program-controlled amplifier via a preamplifier and a broad band filter, an output signal envelope detector is connected with a slave microprocessor through a control line and a data bus, the program-control amplifier is connected with a DDS signal generator via a phase lock loop.
是主微处理器控制信号传感器与阻抗匹配网络的接通与断开，阻抗匹配网络经前置放大器、宽带滤波器与程控放大器连接，输出信号包络检测器通过控制线和数据总线与从微处理器连接，程控放大器经锁相环连接DDS信号发生器。
Based on an architecture model of a two-tone signal, we analyze the effects of the finite envelope modulator bandwidth and differential delay between envelope signal and RF phase signal on the intermodulation distortion, and derive a general simplified model that is much closer to laboratory measurements.
从双频信号模型出发，分析了包络通道带宽和相位包络间信号延时差对交调失真的共同影响，得出了一个更符合测试结果的通用简化模型。
The paper introduces the spatial power-combining technique and analyzes the main factors affecting the combined efficiency, the efficiency of the AWGN environment under the influence of carrier-phase-error and envelope delay error and the relationship of combined efficiency and signal coherent bandwidth.
介绍了空间功率合成系统的基本原理和主要技术，分析了影响空间功率合成效率的主要因素，通过计算机仿真进一步分析了AWGN信道条件下载波相位误差和包络时延误差对空间功率合成效率的影响，进而分析了信号相干带宽与合成效率的关系，最后根据仿真结果对采用空间功率合成技术的通信对抗系统给出了初步的系统构成，并给出了相位调整和时延调整2个关键模块实现方法。
The linearity and stability of RF PAs for wireless communication are analyzed in this dissertation. The principal contributions of this dissertation include: The envelope elimination and restoration technique has been widely applied to improve the efficiency and the linearity of RF PAs simultaneously. A new method is proposed to analyze the intermodulation distortion of RF PAs with EER. A general simplified model for IMD is founded which varies with the bandwidth of envelope path and the differential delay between envelope and phase signals, and overcomes the limitation of Raab`s model which can only solve such two specific instances as zero differential delay and infinite bandwidth of envelope path.
本论文研究了用于无线通信的射频功率放大器的线性化和稳定性，完成了以下工作：1包络消除与恢复技术能同时提高射频功率放大器的效率和线性度，本文提出了一种新的分析其交调失真的方法，建立了交调失真随包络通道带宽和包络相位延时差变化的通用简化模型，该简化模型克服了Raab模型只能处理零延时差和无穷包络通道带宽这两个特例的局限性；采用本文模型得出的交调失真等高线图还可以帮助设计者快速准确地选择电路参数。
The linearity and stability of RF PAs for wireless communication are analyzed in this dissertation. The principal contributions of this dissertation include:The envelope elimination and restoration technique has been widely applied to improve the efficiency and the linearity of RF PAs simultaneously. A new method is proposed to analyze the intermodulation distortion of RF PAs with EER. A general simplified model for IMD is founded which varies with the bandwidth of envelope path and the differential delay between envelope and phase signals, and overcomes the limitation of Raab`s model which can only solve such two specific instances as zero differential delay and infinite bandwidth of envelope path. A contour map derived from the general model in this dissertation is helpful for the designers to choose circuit parameters quickly and accurately. A novel adaptive delay-control method, implemented in the baseband, is presented to improve the linearity of RF PAs with EER. This method can be applied to the linearization of wideband PAs and makes the RF PAs easy to meet the spectral mask specification of IEEE 802.11b wireless communication systems with 11MHz-bandwith effectively.
本论文研究了用于无线通信的射频功率放大器的线性化和稳定性，完成了以下工作：1包络消除与恢复技术能同时提高射频功率放大器的效率和线性度，本文提出了一种新的分析其交调失真的方法，建立了交调失真随包络通道带宽和包络相位延时差变化的通用简化模型，该简化模型克服了Raab模型只能处理零延时差和无穷包络通道带宽这两个特例的局限性；采用本文模型得出的交调失真等高线图还可以帮助设计者快速准确地选择电路参数。2针对包络消除与恢复结构的特点，提出了一种全新的在基带进行自适应调整延时的线性化方法，这种方法适用于宽带功率放大器的线性化，对于信号带宽为11MHz的IEEE 802.11b宽带无线通信系统，根据这种线性化方法设计的射频功率放大器，能有效达到系统谱罩要求。
Moreover, simulation results show that it has a better performance in terms of the probability density functions of the envelope and phase, the level crossing rate, and the average fade duration than the previous methods.
仿真结果表明，改进后的方法生成的复随机过程的幅度、相位的概率密度函数及平均电平通过率、平均衰落持续时间能更好地逼近理论参考值。
Bandwidth Efficient Constant Envelope Continuous Phase QPSK Modulation ［J］.
带宽有效包络恒定的连续相位QPSK调制［J］。
This may be a precursor of what astronomers refer to as the common envelope phase, a short-lived period of a binary star`s existence that is thought to last for just a few thousand years.
这可能是天文学家们提到的共包层阶段的前身，这是双星生命中的短期阶段被认为仅持续几千年。
In this thesis, first, the principle of ISAR is introduced, discussing three steps in ISAR imaging in details (including envelope alignment, phase compensation and imaging), and some of the practical methods are summarized.
本论文首先介绍了ISAR成像原理，分别对ISAR成像的三个步骤(包络对齐、相位补偿和成像)加以详细探讨，对现有的大部分实用的方法进行归纳总结。
The modulated envelope and phase message signals are combined and amplified by switched-mode PA.
调变后的大小及相位讯号会在功率放大器处合并并放大。
While the aircraft at its near operating phase, because the antenna gain is symmetrical relative to the beam center, consider center frequency point of the beam center as the center, the energy integral of echo spectrum envelope should be equal on both sides of it.
对于飞行器近区运行阶段，由于天线增益关于波束中心具有对称性，以波束中心对应的频率点为中心，其两侧回波频谱包络的能量积分应当是相等的。
Secondly, a strategy for generating carrier-envelope phase-dependent field-free molecular orientation was proposed with the use of carrier - envelope phase (CEP) stabilization and asymmetric terahertz (THz) few-cycle laser pulses.
另一个方案是利用载波包络相位稳定的太赫兹周期量级激光脉冲实现载波包络相位敏感的场后分子定向。
The way is put forward for improvement on arithmetic based on envelope mean. The validity and accuracy of phase difference method is analysed and validated.
提出了基于包络均值法的改进算法；分析并验证了利用相位差分法进行瞬时频率估计的有效性和精确性；给出了进行局域波分析，信号采样频率的选择标准。
Digital phase detection (DPSD) is used to extract the echo envelope. The relation between the primary frequency of the output by digital phase detection and that of modulation signal from the echo is derived.
采用数字相敏检波算法从陷波后的输出信号中提取出回波信号的包络幅值，并推导了数字相敏检波后输出信号的主频与回波信号中调制信号主频的关系；
Motion compensation includes range alignment and phase reference selection technology. Frequency correction algorithm, spatial correction algorithm and envelope minimum entropy algorithm are respectively applied in range alignment. Phase compensation is according to selection of the phase reference.
运动补偿部分主要解决距离校正和相位基准选择技术，距离校正分别采用了频域校正法、空域校正法和包络最小熵法，主要依据相位基准选择的方法来进行相位补偿。
Similarly, as a way of continuous phase modulation with constant envelope, GMSK (gaussian minimum frequency shift keying) has good spectrum characteristics and ber performance.
同样，GMSK（高斯最小移频键控）作为一种恒包络连续相位调制方式，它有着优良的频谱特性和误码性能。
It has been shown that when the phase spectrum in speech is changed and it's amplitude spectrum is kept constant, there is no different auditory perception between the original speech and the reconstructed speech if the envelope of the reconstructed speech signal is not changed.
实验结果表明，保持语音信号的幅度谱不变，在改变其相位谱时，只要重建信号在时域中的包络不变，重建语音和原始语音就不存在主观听觉上的差异。
High order harmonics from atoms driven by intense femtosecond laser pulses can lead to a single isolated attosecond XUV pulse or an attosecond XUV pulse train contained two or more pulses depended on the duration and the carrier envelope phase of driving laser field.
强飞秒激光驱动的原子的高次谐波过程可以产生单个的阿秒脉冲或者包含有两个或多个脉冲的阿秒序列，这依赖于驱动激光的脉冲宽度和载波相位。