查询词典 difference set

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。

Papers analyzed the management flexibility and value of mining engineering, and set up the model of value of a developed mine,value of an undeveloped mine and value of an exploration project under the conditions of uncertainty with the theory of real option,and worked out the solution of model above-mentioned through three numerical methods,i.e.the Fig Tree,finite difference approximation and Monte Carlo simulation.

论文最后研究了矿业工程中的管理灵活性及其价值，运用实物期权方法分别建立了不确定条件下矿业生产阶段、开发阶段和详查、普查、预查阶段的矿业投资评价模型，并运用二叉树图、有限差分逼近和Monte Carlo模拟三种数值方法对所建模型进行了求解，同时通过实例对论文的研究结果进行了佐证。

It is show that if one chooses the field points appropriately, the set of finite difference equation is applicable for a boundary condition involving perfectly conducting surfaces.

如果选定恰当的域点，差分方程组加上适用的边界条件可以很好的模拟表面。

Be like: According to the fixed position of oneself, give an user certain and special user experience, perhaps set out from competitive angle again, can come true easily the difference with adversary is changed or coessential change the strategy.

按照自身的定位，给予用户某些特殊的用户体验，又或者从竞争的角度出发，可以轻易地实现与对手的差异化或同质化战略。

Make a hairbreadth difference and heaven and earth are set apart; if you want the truth to stand clear before you , never be for or against.

仅仅因为做微细的区分，天堂地狱由此分开；如果你想真理清楚的展现在你的面前，从来不要支持或反对。

His hat a silk one was inadvertently knocked off and, as a matter of strict history, Bloom was the man who picked it up in the crush after witnessing the occurrence meaning to return it to him (and return it to him he did with the utmost celerity) who panting and hatless and whose thoughts were miles away from his hat at the time all the same being a gentleman born with a stake in the country he, as a matter of fact, having gone into it more for the kudos of the thing than anything else, what's bred in the bone instilled into him in infancy at his mother's knee in the shape of knowing what good form was came out at once because he turned round to the donor and thanked him with perfect aplomb , saying: Thank you, sir , though in a very different tone of voice from the ornament of the legal profession whose headgear Bloom also set to rights earlier in the course of the day, history repeating itself with a difference, after the burial of a mutual friend when they had left him alone in his glory after the grim task of having committed his remains to the grave.

他的帽子冷不防被碰掉了，看到这副情景并在混乱中拾起帽子以便还给他的正是布卢姆。这是确凿的历史事实。巴涅尔气喘吁吁，光着头，当时他的心已飞到距帽子不知多少英里以外。敢情，这位先生生来就是注定要为祖国豁出命去干的。说实在的，首先就是为了荣誉而献身干事业的。他幼小时在妈妈腿上被灌输的周全礼节已渗透到他骨子里，这当儿突然显示出来。他转过身去，朝递给他帽子的那位十分镇定地说了声："谢谢你，先生。"当天早晨布卢姆也曾经提醒过律师界一位名流，他头上的帽子瘪了。巴涅尔的声调可跟那人大不一样。历史本身重复着，但反应并不尽同。那是在他们参加一位共同朋友的葬礼，完成了把他的遗体埋入墓穴这桩可怕的任务，并让他孤零零地留在荣光中之后。

We found 110 Kentish Plover nests in 8 sites, total area 22.74 ha, in Shengshi, Changhua during mid-April to mid-May. The hatching success of 89.09% was high compared to other studies. Thirty-six experimental artificial nests were set for a two weeks period in May to examine the effects of predators and rainfall. Among the 12 unsuccessful nests, 6 were flooded, 4 were abandoned, and 2 were predated. Successful nests and unsuccessful nests showed no difference in distance to nearest road and distance to nearest vegetation line.

调查从四月中旬至五月中旬於样区共追踪110巢东方环颈鴴的孵化情形，并於五月份设置36个人工试验巢进行两星期的追踪以了解捕食和降雨对孵化成功率的影响程度。110巢东方环颈中有98巢成功孵化，孵化成功率高达89.09%，以Mayfield Method 估算之孵化成功率亦高达83.53%，未孵化的12巢中，有6巢是因降雨淹水而失败，4巢是亲鸟弃巢，2巢被捕食。

In a word, these results indicate that there were no any difference of spatiotemporal cortical activation patterns underlying the early stage of insight problem solving between Aha logogriphs and No-aha logogriphs. In the process of activating heuristic information and then hastening the onset of insight, LPFC/ACC played an important role, which may be associated with the breaking of mental set successfully and the forming of novel associations in insight. The "Aha" feeling mainly provoked the PCC brain region in the solving the logogriph at last.

综合实验6与实验7的结果，我们认为，在字谜解决的早期，"有顿悟"与"无顿悟"字谜所诱发的脑电并没有明显的差异，原型激活可能主要发生在字谜解决的1400 ms左右，字谜的成功解决在1400-2000 ms内导致了左侧额中回／扣带前回的更强激活，这可能与原型激活以后，被试利用启发信息，突破思维定势，形成新异联系的认知过程有关；随后在2000-2500 ms内，字谜的成功解决则诱发了强烈的情绪体验，导致了扣带后回的明显激活。

The mission of the stage English of foundation education course is:Stir up with development student study English of interest, make the student set up self-confidence heart, develop good of study habit and formation valid of study strategy, development independence study of ability and cooperation spirit;Make the student control certain of English foundation knowledge with listen to, say, read, write technical ability, formation certain of comprehensive language usage ability;The observation of the development student, memory, thinking, imagination ability and frontier spirit;Help student understanding world with medium west culture of difference, expand visual field, development patriotism spirit, formation health of philosophy of life, is their life long study and development dozen descend good foundation.

基础教育阶段英语课程的任务是：激发和培养学生学习英语的兴趣，使学生树立自信心，养成良好的学习习惯和形成有效的学习策略，发展自主学习的能力和合作精神；使学生掌握一定的英语基础知识和听、说、读、写技能，形成一定的综合语言运用能力；培养学生的观察、记忆、思维、想象能力和创新精神；帮助学生了解世界和中西方文化的差异，拓展视野，培养爱国主义精神，形成健康的人生观，为他们的终身学习和发展打下良好的基础。

Have the minute difference, and generate brightness within proper long short wave range, every keeps a lucency at the same time and other between the set.

有着细微的差别，并在特有的短波长范围内生成光，同时与其他各组之间保持透明。

The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.

此刻阴唇已经几乎完全的缝在一起了，排除多余淤血体液的管子和Foley导管从顶端冒出来。

To get the business done, I suggest we split the difference in price.

为了做成这笔生意，我建议我们在价格上大家各让一半。