查询词典 selection precinct

Feature selection is one of the key problems in text categorization. The chief obstacles to feature selection are noise and sparseness.

特征选择是文本分类的关键问题之一，而噪音与数据稀疏则是特征选择过程中遇到的主要障碍。

In this regard, the research trend of globalization of competition has been positively open up. In this paper a novel simulated annealing feature uniformity band selection approach is proposed for the feature extraction of the hyperspectral remote sensing images. The simulated annealing band selection method has been successfully applied to the feature extraction of the hyperspectral images by clustering highly correlated hyperspectral bands into a smaller subset of band modules based on simulated annealing algorithm. SAFU built by SABS is an efficient feature extraction method.

本篇论文提出一个新型的模拟退火特徵齐一化波段选取法应用在高光谱遥测影像的特徵萃取，模拟退火波段选取法已经成功的应用在高光谱影像的特徵萃取藉著群集高度相关的高光谱波段将之形成一个基於模拟退火演算法波段模组的子集合，本文提出之SAFU是建立在SABS之上，利用旧有SABS的特性加以改良，提出SAFU来对於高光谱影像可以更有效率的进行特徵萃取。

Selection for the early-maturing made chicken reach maturity early. To compare the growth parameter of L2 and S strains with similar body weight, it showed that selection for egg production might result in the dam lines pullets earlier to maturity indirectly.

比较体型相似的L2和S品系母鸡之生长性能参数，L2品系母鸡在性成熟速率方面略高於S品系母鸡，显示母系针对产蛋数进行选拔可能间接使初产提早。

The appearance of new poems in Chinese Teaching Books has enriched the selection of texts to some extent, but meanwhile, its special history background makes it in an awkward situation by the way that the selection of teaching content is too much politic and ignore the inherent value of the pomes.

中文摘要：新诗在语文教材中的出现一方面增加了语文教材选文的丰富性，但同时也由其特殊的历史背景使其在教学内容的选择上处于&太政治&而忽视了诗歌自身价值的尴尬境地。

Experiment results show that the algorithm can supply an effective solving scheme for the computer realization of the artillery position selection, and discover the potential relationships and rules in vast spatial database when it is applied to the development of the artillery position selection system, so it can help decision makers to make sensible decisions.

实验表明，将该算法应用于炮阵地选取决策支持系统，可以发现空间数据库中存在的潜在关系和规则，为炮兵阵地选取的计算机实现提供了一种有效的解决方案，从而可以辅助决策者做出科学的决策。

UV light curing system is also optimized to deal with a variety of selection methods to avoid wasting power when printed vial, tube length and flexible selection many stalls, power, and also reduce costs of the.

UV光固化系统也进行了优化处理，多种选择方式，避免了印小瓶时功率浪费，灯管长短及多档位选择灵活多变，省电了，也就降低成本了。

The selection and performance of base cloth for rubber goods involved from the selection of fiber materials and fabric structure , such as woven fabric, directional warp-knitted fabric,three-dimensional fabric and pretreatment of base cloth were summarized.

介绍了橡胶制品基布的基本性能和基本要求，从纤维材料的选择，机织物、取向经编织物、三维织物等织物结构的选择以及基布预处理方面述评了橡胶制品基布的选择和性能。

Factory remaining hot water, remaining vapor and boiler heating system, were adopted in tilapia overwintering. Every step, such as site selection, pond and fish preparation, cultivation of fish, fish selection, timing of overwintering, stocking density and managements during overwintering, was compared among three systems. The results of data analysis showed that the survival rate in remaining hot water system was 12% higher than in remaining vapor system and 21.25% higher than in boiler heating system. The overwintering cost in remaining hot water system was 735 Yuan/m~3, which was 18 Yuan lower than in remaining vapor system and 71.4 Yuan lower than in boiler heating system. The profit in remaining hot water system was 201 Yuan/m~3, which was 162 Yuan higher than in remaining vapor system and 275.4 Yuan higher than in boiler heating system.

本论文采取了余热水、余热气、锅炉加温三种方式对进行罗非鱼越冬保种，从地点选择、越冬池、鱼的准备、越冬苗种的培育、越冬前催肥、越冬鱼的选留、越冬鱼进池时间和密度、越冬期间饲养管理等环节进行对比试验获得了三种方式的试验数据并进行了分析讨论，结果显示：余热水越冬雌亲鱼的成活率比余热气越冬高出12％、比锅炉加温越冬高出21.25％；余热水越冬雌亲鱼的成本每立方米为735元比余热气越冬的成本每立方米低18元、比锅炉加温越冬的成本每立方米低71.4元；余热水越冬雌亲鱼的利润每立方米为201元比余热气越冬的利润每立方米高162元、比锅炉加温越冬的利润每立方米高275.4元。

Gas valve body material selection Pressure gas pipeline under the reasonable use of the valve housing material selection, not only palace to meet the safe operation of pipeline and is able to reduce the cost and make the best use for the purpose.

三、燃气阀门的阀体材质选用根据燃气管线的使用压力合理选用阀门壳体材质，既宫满足管线的安全运行又能达到减少造价，物尽其用的目的。

Finally, based on the principle of the selection of express highway, the scheme of the selection of express highway of the Qinyu landslide is optimized and proposed the scheme of right bank tunnel is the best from the engineering and geological perspective.

综合上述研究成果，结合公路选线原侧，从工程地质角度上，对秦峪滑坡群段公路选线方案进行优化，建议右岸隧道方案为最优方案。

The statistical analysis of this large set of mutations has led us to propose a diagnostic strategy that should help with the molecular work-up of optic neuropathies.

这一大系列基因突变的统计学分析引导我们提出一个诊断策略，可以帮助我们对视神经病变进行分子学的诊断检查。

The results show that the pipe grouting changes the mechanical parameters of surrounding rocks to achieve the security of engineering objectives by reinforcing surrounding rocks and bolcking the water.

研究表明：小导管注浆一方面改变了围岩的力学参数，另一方面利用浆液的固结特性可以实现堵水和加固围岩的工程目标，使隧道在开挖过程中的安全得到保障。