To fit the needs of burst communication systems, one-bit and two-bit differential demodulation methods are studied in the thesis and realizes GMSK modulation and demodulation process using the former. A comparison is made to see the performance differences of the two methods using MATLAB.

This paper advances an implement scheme of the PAM-UWB system. The scheme adopts the synchronization algorithm which combines the TDT algorithm and slipping correlation, and the differential demodulation method for information recovery.

本文提出了一种PAM-UWB系统的实现方案，该方案采用TDT同步算法与滑动相关相结合的同步算法，在同步实现后采用差分解调实现信息恢复。

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The simulation results show that the performance improvement of proposed algorithm is superior to conventional differential demodulation by 1.4 dB at a BER of 10-4 in AWGN channel.

仿真表明，相对于软判决译码时传统的差分解调，该算法在误比特率BER为10-4时在AWGN信道中有1.4dB的性能改善，在Rician信道中同样有显著的性能改善。

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Thirdly, for differential demodulation, two kinds of timing algorithm and improvements in application are proposed, joint synchronization algorithm and statistical algorithm.

再次，针对差分解调提出了两种定时算法，联合同步法和统计法。

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Design of digital filter is an important part in signal processing. The band-pass, low-pass and delay filters are involved in differential demodulation.

数字滤波器的设计是信号处理中非常重要的环节，在差分解调中涉及到带通、低通和延时滤波器的设计。

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The paper proposes the application of nonredundant error correction in differential demodulation combined with soft-decision decoding.

提出了结合软判决译码的非冗余纠错（nonredundant error correction）在差分解调中的应用。

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We need delivered price for less than $ 0.10 which means your price is way to high.

我们要求含运费价格低于0.10美元,也就是说你们的价格太高.

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Therefore, the effect on the breeding and resource enhancement of demersal fishes brought by freshwater snail cannot be ignored.

因此，螺类对产粘性卵的鱼类的繁殖和资源增殖所带来的影响不容忽视。

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The pattern of probability distribution on the density of demersal fishes stock in the northern continental shelf of the South China Sea

南海北部大陆架底层鱼类资源密度概率分布型的研究

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Essential characteristics and their seasonal variations of community structure of demersal fishes in the Xiamen Harbour

厦门港湾底栖鱼类群落结构的基本特征及其季节差异

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The dietary overlap coefficient and food resources of enhancement species among demersal fishes in Bohai Sea

渤海重要底层鱼类食物重叠系数与鱼类增殖

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The culture species of freshwater fisheries in China are most midwater and demersal fishes caught by traditional fishing gears and drug.

目前我国淡水水域的养殖对象大多为中、底层鱼类，仍主要采用传统渔具捕捞。

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Theory of demand-pull inflation

需求拉动通货膨胀理论

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The result indicate the causes of China technology markets growth is demand pull not technology push.

结果表明：中国技术市场规模扩张的类型属于需求拉动的规模扩张，而不属于技术推动的规模扩张。

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Demand pull factors: Factors that attract migrants into another country.

需求拉动因素，吸引因素：指吸引移民到另一个国家去的因素。

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Enhancement of China Innovation Capability: From Technological Diffusion to Demand Pull

中国技术创新能力提升：从技术扩散到需求引致

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The motivation is demand pull and science and technology push;

需求拉力与科技推力是发展的动力；

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Conclusions Denticulate ligament was a mark and could be used to identify and localize the spinal nerve anterior and posterior roots in the SPR or SAR, especially for the cervical nerve roots.

结论在选择性脊神经根切断术中，齿状韧带可作为一标志，脊神经前、后根可通过齿状韧带加以鉴别和定位，特别在颈部。

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Results: The ventral roots lay in front of the denticulate ligament, while the dorsal one behind it.

结果：臂丛前后根之间有齿状韧带相间隔；

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Methods The denticulate ligament was observed and measured on 30 adult specimens.

方法对30例（60例）成人尸体的齿状韧带进行了解剖学观测和测量。

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CT scans showed bilateral symmetrical hypodensity foci in lenticular ( 5/ 7), head of caudate nucleus ( 4/ 7), thalamus ( 2/ 7) and dentate nucleus ( 1/ 7).

双侧豆状棱（5/7）、尾状棱头部（4/7）、丘脑（2/7）及齿状核（1/7）对称性低密度区和与年龄不相符的脑萎缩。

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