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Both LDPC codes and OFDM technology are studied in this paper. The working and the results obtained are summarized as follow:1. The definition of LDPC codes and its coding/decoding ideas are systematically summarized, a general algorithm of changing any parity-check matrix to lower triangular form, which is suitable for quick encoding, is given out, along with a girth checking algorithm. Absolutely random LDPC codes construction is improved, a new half random construction of LDPC codes with linear time coding and no 4-cycles is brought out.

系统地阐述了低密度校验码的定义及编译码原理，提出了一种将任何校验矩阵变换成适于快速编码的近似下三角形式的通用算法及一种围长检测算法，对完全随机的校验矩阵构造法进行了改进，提出了一类消除4环且可近似线性编码的校验矩阵半随机构造法，仿真表明，在高编码效率情况下，改进后的半随机构造法，其性能稍优于完全随机构造法，并可以线性时间编码，因此更适合实际应用。

Lyell, MD, from Stanford Uniersity Medical Center and Lucile S. Packard Children's Hospital in California, and colleagues.

Lyell博士及其同事称，硫酸镁是北美最常用的第一线安胎药物，虽然还没有被证明它的效果优于盐水注入，它的应用也一直存在争议。

However, CD8 T were significantly better than T at rejecting allografts in the absence of secondary lymphoid tissues.

但是，在发生排斥反应的无次级淋巴样组织的移植物中，CD8 T明显优于T。

After the intervention of TCM prescription of enriching qi, promoting circulation and dissipating phlegm, the macrography mentioned above got better, the wall and collogen of small airway thinned, the lung function such as Re, FEV0.3/FVC, MVV and FEF25～75 were better than the model, with significant difference.

给予益气活血化痰法中药复方干预后，COPD模型大鼠上述体现气虚血瘀证的表象轻，小气道气道壁、胶原厚度均较模型组薄，肺功能Re、FEV0.3、FEV0.3/FVC、MVV、FEF25～75优于模型组，差异有统计学意义。

The experimental results show that the process is not only effective use of the concentrated sea water, the concentrated solution of sea water emissions, and produce six water quality is better than the industry standard magnesium chloride.

实验结果表明，采用该工艺不仅有效利用了浓海水，解决了浓海水排放问题，而且生产出的六水氯化镁质量优于行业标准。

The experimental results showed that (1) UASB was able to apply on high concentration of malodor organosulfur compounds, and malodor was effectively removed.

试验表明，（1）UASB可承受很高浓度的恶臭物质，并能达到明显的除臭效果，两级串联的效果要优于一级的处理效果。

The results show that the man-powered sampling device can produce much better response than the battery-driven sampler and that, to get satisfactory anomalies, we should totally collect more than 9 liters of pumping gases at each sampling site.

在已知隐伏矿区，利用合适的液态捕集剂进行了动态累积测量不同采样装置及抽气量效果对比试验，结果表明，手提式采样器装置系统效果明显优于大气采样器装置系统，每点采样量在9L以上效果较好。

The economical benefit and advantage of SFRC manhole cover is analyzed.

分析了钢纤维混凝土井盖的经济效益，其经济性优于铸铁井盖。

The pathogen grew well on the media using glucose, sucrose, fructose, maltose, rhamnose or soluble starch as carbon sources. Galactose, xylose, mannite or sorbose was not beneficial for the growth of the pathogen, however. The media with only organic or inorganic nitrogen sources were not suitable for the pathogen growth although organic nitrogen sources were better than inorganic nitrogen sources. The pathogen could also infect Allium cepa L., A. fistulosum L. and A. odorum L. under artificial inoculation conditions.

在碳源中，以对葡萄糖、蔗糖、果糖、麦芽糖、鼠李糖和淀粉的利用为佳，而半乳糖、山梨糖、甘露醇、木糖和菊糖不利病菌的生长；有机氮源优于无机氮源，但单独应用有机或无机氮作为营养均不适于此病菌的生长；在人工接种条件下，病菌可侵染葱、洋葱和韭等葱属植物。

One that is markedly superior to all others, as in the ability to succeed.

举世无双的人明显优于所有其他人的人，如取得成功的能力。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。