调制的

It is a combination of the pulse amplitude modulation and frequency modulation types.

该仪器系统是由脉冲幅度调制和频率调制两种遥测系统复合组成的。

The scheme is scheduled through combining multi-level adaptive modulation and coding with hybrid automatic repeat request protocol.

该方案利用自适应编码调制技术和混合自动重传技术交互协作，使发射端可以根据反馈的延时信息自适应调节调制模式，选择发射权以及自动重传数据。

The author introduced the basic principle of this novel modulator and made a comparison between it and traditional method.

介绍了这种锗材料作为调制器代替机械调制方法的基本原理，并且进行了对比研究。

A modem with a maximum data transfer rate of 9,600 bits per second.

9，600bps 调制解调器最大数据传输速率为 9，600bps 的调制解调器。

Their vocal quality is better than non-passerine, but still much less than oscine passerine. Compared with non-passerine, they appeared longer syllable length, higher basic frequency and more viable frequency ranges. Though the amplitude modulation properties enhanced their vocal production, the type of syllable is still stable and less of variety. So thephrase consisted of syllables are comparatively few and changes of the tone are relatively less.

且表现出很强的频率调制特性和特有的幅度调制特性，相对的音节时程比较长，基频较高且频率变化范围较大，所特有的幅度调制特性更增加了其控声的能力，但其音节的种类仍很单一，缺乏变化，由音节所组成的句型较少，音调变化幅度不大，因此，其叫声质量尽管较非鸣禽有所改善，但相对鸣禽而言却又远远不如。

The treatments of rice straw-based blocks were as follow: Rice straw block Ⅰ was composed of 74.2% rice straw treated with chemicals, 20.4% concentrate mixture and 3.3% minerals premixture; Ten percent rice straw from rice straw block Ⅰ was equally substituted by corn silage or concentrate for rice straw block Ⅱ or Ⅲ; Additional 10% water was supplemented to rice straw block Ⅳ, based on the straw block Ⅰ, in order to decrease the rigidity of the straw block.

复合稻草块的调制：①稻草块Ⅰ由74.2%的稻草、20.4%混合精料等压块调制而成；②稻草块Ⅱ、Ⅲ是将稻草块Ⅰ中10%的稻草分别用青贮玉米、混合精料等量替代调制而成；③稻草块Ⅳ的组成与稻草块Ⅰ相同，仅在压块时额外添加10%的水分，以降低其硬度。

The main valuable contributions listed as the following: The dissertation at first takes a view on the currently dominant modulation recognition algorithms and summarizes the basic structures and the characteristics of those. Meanwhile, it summarizes the methods of extracting the classification feature and generalizes the commonly used features.

主要工作可概括如下：论文首先概述了目前主要的调制识别方法，总结了一般调制识别方法的基本结构和各组成部分的特点，同时还对分类特征的提取方法和常用的分类特征进行了概括及总结，并且提出了调制识别领域有待解决的主要课题和研究方向。

Based on the analyzing synchronization modulate and synchronism modulate, for the defects of synchronism modulate, uses prefabricating SPWM waves table, soft open loop synchronization model, exactitude modify and coarse modify, implements phase locking and synchronization accuracy.

在对SPWM逆变电源的两种常规调制方式与同步模式分析的基础上，采用异步调制方式，同时对该调制方式的缺点采用了SPWM波形表格预制法与软开环同步模式、粗调与精调相结合的方法，实现了高精度的锁相与同步技术。

Carrier suppression double sideband optical signal with 40 GHz repetitive frequency is generated by using an optical phase modulator along with optical filtering technique.

在中心站采用相位调制器结合滤波的方法产生重复频率为40 GHz的载波抑制双边带毫米波信号，利用交叉复用器分离开毫米波信号的上下边带，其中的一个边带强度调制数据速率为2.5 Gbit/s的下行基带信号，另一个边带被发送到基站调制上行传输的基带数据。

The paper investigates both block-type pilot linear minimum mean square error algorithm and IEEE802.16 OFDM channel estimation analysis. Simulation results confirm the block-type pilot structure is more suitable for IEEE802.16 system. An optimal pilot setting algorithm, based on space frequency domain, is explored and the pilot chart is presented. The proposed algorithm finds its application in MIMO-OFDM. Simulation results show the algorithm presents a good approximation to the perfect channel state information curve, with about 2dB difference in SNR. The simulation results also demonstrate the algorithm achieves fairly high stability in the environment of fast fading, performance of the proposed algorithm is better that of pilot training channel estimation.3. Taking into account the characteristics of IEEE802.16 OFDM system, OFDM system simulation platform is constructed in Matlab, exploiting simulink as a tool. OFDM modulation and demodulation simulation system are configured on LabVIEW platform. All the system signal processing is simulated, including defining system parameters, designing modulation model, and verifying all the proposed algorithms under different environments, such as white Gaussian noise, multi-path fading, with or without guard interval etc. Bit error performance is evaluated. The research provides valid theoretical basis for practical OFDM system performance evaluation.4. Taking advantage of software radio, the paper designs a hardware platform with both 256-IFFT/FFT and 512-IFFT/FFT OFDM schemes co-existing in one platform. You can predetermine one from the two schemes to carry out almost the same model function with different system performance and parameter setting.5. Referring to IEEE802.16 standard, the paper proposes a design method for generating signals and frames suitable for laboratory investigations implemented in laboratory environment.6. Based on 6701evm digital evaluation card, combined with analogy front-end, the paper designs a DSP software model to deal with baseband signal processing. An overall OFDM scheme, with modulation and demodulation function, is accomplished.

讨论分析了MIMO-OFDM中一种基于空频域的最优导频设置算法，给出了导频图案，通过仿真实验表明，该算法与理想的信道状态信息曲线非常接近，信噪比差距约在2dB左右，并且在快衰落条件下具有较好的稳定性，其性能要优于基于前导训练的信道估计方法。3、根据IEEE802.16OFDM系统特点，论文分别在Matlab中应用Simulink工具构建OFDM系统仿真平台、在LabVIEW平台上实现了OFDM调制解调仿真系统，模拟了整个系统的信号流程，进行了OFDM仿真系统参数的选择和调制模块的仿真设计、论证各算法性能，并根据各种不同的条件：例如高斯噪声、多径衰落、有无保护间隔等，对系统的误码特性进行了评估，为正确评价实际OFDM系统的性能提供了有效的理论依据。4、论文以软件无线电思想作为指导，提出了以256点IFFT／FFT为核心和以512点IFFT／FFT为核心的两种OFDM算法模式并存于同一个硬件平台、且可预选的方案，它们在参数选取和性能指标上有所差异，均实现了相似的模块和功能。5、论文参考IEEE 802.16无线网络标准的参数设置，针对本设计系统的应用环境和系统硬件的性能速率，提出了一种应用于实验室环境的信号结构、帧格式等参数设计。6、论文基于TI公司的6701evm数字评估板卡，结合模拟前端搭建数字中频平台，设计了基带处理的DSP软件模块并进行系统调试，基本实现了一套完整的OFDM调制解调方案。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。