查询词典 kernel preserving functor

Hybridization between species can lead to introgression of genes from one species to another, providing a potential mechanism for preserving and recombining key traits during evolution.

英国John Innes中心和圣·安德鲁斯大学的科学家确定了一种关键的基因，它从生长在意大利的一种名为Senecio squalidus的植物中转入到了生长在英国的"近亲"千里光。

Particularly last year , in accordance with Japanese client requirement , made great effort on positive list and agricultural chemicals' remainder . We strictly control agricultural chemicals' selecting 、 purchasing 、 preserving 、 concentration and spraying , get better effect and gain client's intrust and good appraisal .

特别是去年，针对日本客户的要求，在对应肯定列表和农药残留方面狠下功夫，在农药的选定、采购、仓库管理、浓度管理和喷洒管理等环节都严格控制，收到了较好的效果，并且赢得了客户的信任和好评。

Experiments show that the framework is right and the proposed algorithm is able to achieve an inverse halftoning image with good visual quality,it has a better edge-preserving ability and peak signal-to-noise ratio is increased.

实验验证了多尺度逆半调框架的正确性，并且该算法所得逆半调图像具有良好的视觉效果，能保持图像边缘，峰值信噪比也有所提高。

Based on the summarizing of the exiting algorithms of the texture mapping and antialiasing, this paper goes deeply into the basic theory and processing of texture mapping. The texture compress algorithm which can satisfy the need of the memory and time is given for the stochastic sampling in the inverse texture mapping; the geometry transformation in the texture mapping are discussed and the concepts of the unitary parametrization and the patch parametrization is proposed, some kinds of the unitary parametrization methods of parametric surfaces and the geometry transformation in the patch parametrization are also presented; in order to solve the aliasing in the parametrization of intermediate surface-sphere in two-part texture mapping, an area-preserving transformation is presented also; to improve the quality of the graph the aliasing in the texture mapping is analyzed from the aspect of signal process, and the modified summed-area tables algorithms is proposed; the distortion of the scanline conversion algorithms under perspective transformation is analyzed and the proper interpolation algorithm is presented so the aliasing problem of the polyhedral object after the unitary parametrization is efficiently solved.

本文在总结现有的纹理映射和反走样算法的基础上，深入研究了纹理映射的基本原理与过程，根据反向纹理映射对纹理随机采样的特殊要求，提出了一种可满足存储空间和寻址时间的纹理压缩存储算法；通过对纹理映射中几何变换理论的进一步深入探讨，提出了整体参数化和面片参数化的概念，并给出了参数化曲面的各种整体参数化方法和面片参数化的几何变换形式；针对现有的两步映射算法所存在的中间曲面—球面的参数化问题，提出一种等积映射方法，较好地实现了由非参数化面片拼接而成的多面体表面的纹理映射；从信号采样的角度深入分析了纹理映射中走样产生的原因，提出了改进的区域求和表算法，使图形生成的效果有所提高；还分析了一般的扫描线算法在透视变换中所存在的问题，提出了一种正确的插值算法，从而解决了整体参数化后多面体表面纹理映射的几何变形问题。

Eliminating the restriction of the characteristic of field ,the forms of invertible linear operator preserving inverses of matrices over full matrix space with at least four elements are described.

去掉了域的特征限制，刻画了至少包含4个元素的任意域 F上的全矩阵空间Mn的保逆的可逆线性算子形式。利用保幂等的结论证明了f为Mn上保持逆矩阵的可逆线性算子当且仅当存在P∈GLn，使得f=εPAP-1，A∈Mn，ε=±1∈F；或者存在P∈GLn，使得f=εPATP-1，A∈Mn，ε=±1∈F

Juke Maodi of Wudadao provides a unique opportunity to embrace and revitalize this area as a place for cultural thinking and activities; preserving its history and in following the spirit of the city's past, adding to the atmosphere which makes Tianjin special.

五大道的Juke Maodi为振兴此地并作为文化思考和活动的场所提供了良机；历史保护，传承城市精神，并将其注入天津的特殊氛围中。

One of Kew's aims is to educate young visitors on the importance of preserving the environment, while learning more about trees.

裘园的其中一个目标是要教育年轻游客，保育环境的重要性，也在学习更多有关树的种种。

Experiments demonstrate that the Laplacian energy is very effective in preserving geometric details and preventing unreasonable volume changes.

实验结果表明，该算法可以有效地保持输入模型的几何细节、防止明显的体积变化，得到了令人满意的结果。

But Fernald and Sardo's home is a modern homestead, preserving the larder for leaner times.

但是 Fernald 和 Sardo 有一栋很现代化的家宅，他们会为淡季和忙季储备食物。

He would tell the people the truth about their stake in preserving peace through the League of Nations.

他将把通过国际联盟保持和平与美国人民利害攸关的真理告诉人民。

But Severus escaped the hands of those that Julianus had sent to murder him and sent a letter to the praetorian guard, giving them the signal either to desert Julianus or to kill him.

赛维鲁总算逃过了尤利阿努斯派来的杀手，并写了一封信给罗马的禁卫军，向他们发出信号，要么抛弃尤利阿努斯，要么干掉他。他们立即服从了。

This text is in terms of this of " human nature ", it is under the influence of western literature human nature thought to probe into, awakening in human nature of novel works and all sorts of limitations that affectionate The school of Mandarin Duck and butterfly.

本文便是从"人性"这一角度，探讨在西方文学人性思想的影响下，清末民初鸳鸯蝴蝶派的言情、哀情小说作品在人性方面的觉醒与种种局限。