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Firstly, those useless to classify texts are filtered according the category document frequency distribution difference of each feature; and then in order to overcome the limitations of TF-IDF weighting formula a novel weighting formula called TF-CDF is presented . Calculate the weight of each feature according to TF-CDF and build the Vector Space Model for the entire corpus. To select significant features, a feature selection approach based on Variable Precision Rough Set is also proposed and implement with some SQL sentences combining the definitions of VPRS with the advantages of SQL sentences.

该文首先根据特征词的类别分布差异进行特征过滤；然后，分析传统的权值公式TF-IDF的缺点，采用改进的权值计算公式简记为TF-CDF，依据TF-CDF公式计算每个特征词的权值，生成文档集的向量空间模型VSM；接着，提出了一种基于可变精度粗糙理论的特征选择进一步选择对分类贡献度大的特征，并用SQL实现。

Article 70 Where a minor relief institution, a children welfare institution or any of its staff members fails to perform the relief and protection duties to minors according to law, or maltreats or discriminates against minors, or seeks benefits in handling the work of accepting minors into its/his fosterage, it/he shall be ordered by the competent department to make a correction, and be given administrative sanctions according to law.

第七十条未成年人救助机构、儿童福利机构及其工作人员不依法履行对未成年人的救助保护职责，或者虐待、歧视未成年人，或者在办理收留抚养工作中牟取利益的，由主管部门责令改正，依法给予行政处分。

Firstly, the research studies the coding rule of the PDF417 barcode and designs related computer code algorithm, with making it programmed, and completes the coding part of the system software. Next, the coding and decoding principle of Reed-Solomon error-correcting code is briefly introduced. According to thecoding and decoding principle in galois field GF(929), to analyze and study its practical application with emphasis in this topic. Then, the PDF417 barcode decoding process is analyzed and studied detailed according to the barcode coding principle, with the corresponding realization method designed, improving the design in theory aspect by using material example, at the same time programming the design method to complete the decoding part of the system. Finally, validated the system program in the practical application of image information aspect, by using the nonrepeatability and the randomicity characteristic of Julia mark shape artwork.

本课题首先研究PDF417条码的编码规则并设计相关的计算机编码算法使其程序化，完成系统软件的编码部分；其次，简要介绍Reed—Solomon错误控制码的编码与译码原理，在伽罗瓦域GF(929)内根据其编译码的原理重点分析与研究其在本课题中的实际应用；然后根据条码的编码原则对PDF417条码的译码过程进行详细的分析与研究，并设计出相应的实现方法，利用具体实例对设计方法进行理论方面的实践同时将设计方法程序化完成系统软件的译码部分；最后利用Julia集分形图形的不可重复性和随机性的特点对系统软件在图像信息方面的实际应用进行了验证。

The study has shown:(1) With increasing sediment depth and the woody giblets, the total organic carbon, the extraction of benzene , the total humic acids and the unhydrolyte are enhanced, while the hydrolyte is decreasing.(2) According to the GC-MS analysis, n-alkane,n-alkan-2-ones and n-alkanones are composed mainly of long-chains,such a result is thought to be characteristic of a herbaceous input from 2300a.B.P. n-alkanones exist in the samples may be considered as the evidence of microorganisms activity.(3) It is showed that the lipids is more sensitive to the climate change than the floristic. The proxy of the pollen spore of the peat stratum is different from the normal environment proxy. It is one of the main reasons that the sensitivity difference of the bog vegetation reacting to the climate isn't accordant with the log of the fat molecule fossil and biology fossil.(4) The transformation of the peat organic carbon is under the influence of temperature,acidity,organic material constituting, etc, and it showed the up-trend with the depth. In the short-term scale, the conversion of the peat organic carbon is effected by seasonal water,regional climate and vegetations; while in the long-term scale, it is controlled mainly by the climate.(5) According to the comparing the orderliness of organic compound,vegetation giblets with the depth to the characteristics of the peat molecule fossil with the section, in the development of this peatmire, 1500a B.P（210cm）is regard as the borderline of the late Holocene, the keynote of the front period is warm with several cold fluctuations, and the trend of the back period is dry and cold although there were several fluctuations.

研究表明：（1）随深度的增高及植物残体中木本残体的增多，总有机碳、苯萃取物、总腐植酸、不被水解物含量逐渐增高，而易水解物含量减少；（2）GC- MS分析显示，正构烷烃，直链烷基2-酮和正烷醇均以长链组分为主，揭示了该泥炭柱剖面2347a.B.P的母源输入以草本植物为主；甲基酮类和短链正烷醇的存在是微生物活性很大的生物证据；（3）通过有机分子标志物与孢粉、植物残体等指标的对比研究表明：脂类化合物对气候变化的反映要比植物种灵敏得多，不同沼泽植物对气候变化的敏感性的差异是脂类分子化石记录与生物大化石结果很难一致的主要原因之一；（4）泥炭有机碳的转化受到温度、酸度、有机物质组成等很多因素的影响，短时间尺度，泥炭有机碳的转化受季节性降水、地方气候和植被等因素的影响；长时间尺度，泥炭地有机碳的转化，受气候条件控制；（5）总结泥炭分子化石特征、泥炭有机质各组分含量及植物残体组成随深度的变异规律，分析结果显示该泥炭地层形成过程中，1500a B.P（210cm）可作为划分前后晚全新世的界线，前期的基调是气候偏暖，但又有几次偏干冷气候的反复，后期气候以干冷为主，其间虽有几次上升波动，但整体趋势不变。

Article 19: After the grantee has paid all the rent for the use of the land according to the contract and get "national land use ratification" as well as the right to use the land, the grantee has the right to transfer, rent and mortgage all or part of the land in the contract. But the first transfer( including sale, exchange, and bestowal) of the land's use right for the remaining years, it should be concluded first by the granter that the land has be developed according to this contract and 25% of the total investment for the development has been finished.

第十九条受让人按照本合同约定已经支付全部土地使用权出让金，领取《国有土地使用证》，取得出让土地使用权后，有权将本合同项下的全部或部分土地使用权转让、出租、抵押，但首次转让(包括出售、交换和赠与)剩余年期土地使用权时，应当经出让人认定符合已经按照本合同约定进行投资开发，完成开发投资总额的百分之二十五以上方可予以转让。

Article 16: Within the allotted time of the land's remise, the grantee should use the land according to the applications and the use conditions regulated in this contract. If the applications and use conditions regulated in this contract should be changed, the relevant formalities should be transacted according to the laws. An application to the granter for permission to sigh the change protocol of the remise contract of resign the remise contract, adjust the rent for remise of the land's use right and transact the registration of the change of land.

第十六条在出让期限内，受让人必须按照本合同规定的土地用途和土地使用条件利用土地，需要改变本合同规定的土地用途和土地使用条件的，必须依法办理有关批准手续，并向出让人申请，取得出让人同意，签订土地使用权出让合同变更协议或者重新签订土地使用权出让合同，相应调整土地使用权出让金，办理土地变更登记。

According to USACE hydrologist Stan Simpson, the organisation carefully plans the river's flow in order to meet the changing needs of the fish; software provided by TNC calculates how much water to release according to the time of year and weather.

美国陆军工程兵团淡水管理专家斯坦。辛普森先生说，他们细心地调整旱季和雨季、春天和冬天鱼类不同需求下的水量。用大自然保护协会提供的软件可以计算出不同时期、气候情况下的放水量。

According to the different compensatory objects, this paper took a project which based on symmetry components to compensate. When SVC is used as the system compensatory, it is mainly used to adjust the system voltage. Therefore, the balanced control strategy is adopted. When SVC is used as the load compensatory, it is mainly used to restrain the voltage fluctuation and flash during the running of the impactive loads,so the unbalanced control strategy is adopted. According to this project, the hardware and software for the control system of SVC are designed.

本文首先分析了无功补偿的基本原理，针对SVC补偿对象的不同，采用一种基于对称分量法的SVC分相补偿方案：作为系统补偿时，SVC主要用来调节系统电压，因此采用平衡控制策略；而作为负荷补偿时，SVC主要用来抑止冲击性负荷运行时引起的电压剧烈波动和闪变，因此采用不平衡控制策略，依据此方案，对SVC控制系统的软、硬件进行设计，对控制系统的数据处理方法及控制策略也进行了详细的分析。

But the unfairness, as well as the inaptitude, of the quotation appears from this, that only the beginning of the passage is quoted:'At a time when the sun is obscured, it is an evil sign to all the world,' while what follows is omitted:'When the sun is obscured, it is an evil sign to the nations of the world; when the moon is obscured, it is an evil sign to Israel, because Israel reckons according to the moon, the nations of the world according to the sun.

但是，不公正，以及inaptitude ，报价从这个看来，这仅仅是个开始的通行引用：'当太阳遮蔽，这是一个邪恶的迹象世界所有，而哪些是省略如下：'当太阳是模糊不清，这是一个邪恶的标志，世界各国，当月球遮蔽，这是一个邪恶的签署对以色列，因为以色列认为根据月亮，世界各国根据太阳。

That is: the optical fibers which are to be tested will wind the same circle according to different radius or will wind the different optical fibers circles according to the same radius, making the direction of incident ray side vibration as parameter, we have done the specific experiments and theory analysis to winding waste of quartz system, both refraction optical fibers and Elastic-optic effect of optical fiber.

即把待测光纤以不同的半径缠绕成相同的光纤圈和以相同的半径下缠绕成不同的光纤圈，以入射线偏振光方向为参数，对单模石英系双折射光纤的弯曲损耗与光纤的弹光效应进行了的具体的实验和理论分析。

The basic concept of FOP can be summarized as to further optimize effective prescription according to the standard of curative effects and with the aid of modern science and technology and theories of traditional Chinese medicine.

其基本内涵可概括为：以确有疗效的中药复方为研究对象，以现代科学技术和传统中医药理论为技术支持，以该复方所治病证的药效响应为评价标准，以优化重组疗效更优的新复方为研究目的。

Ever since our world has been a world, native forests have been indiscriminately exploited by man.

自从我们的世界一直是世界原生森林被任意剥削人。