查询词典 relatively countably compact subset

We prove the depicting condition by base of countably compact space and countably paracompact space in weaker A_2-space.

给出并证明了弱A2空间中可数紧致、可数仿紧致空间用基刻画的条件。

The text applies the covering theory to the study and discussion of the relative compact, the relative countably compact and the relative Lindelff compact.

运用覆盖理论，对相对紧、相对可数紧和相对Lindelff紧进行研究和讨论，给出了它们之间的一些关系，并且结合相对分离性，获得某些传递等性质。

Combing the advantages of the compact spinning with Siro spinning, compact sirospun yarn possesses good performances of both the compact yam and two-ply yarn, such as high strength, less hairy, compact structure and high abrasion resistance. The principle and features of the compact Siro spinning technology are introduced in this paper.

紧密赛络纺将紧密纺与赛络纺技术相结合，所纺纱线具有紧密纱与合股纱的优点，毛羽少，强力高，结构紧密，摩擦性能好，介绍了紧密赛络纺纱技术的原理及特点。

Followed by the decomposition phase is optimal feature subset selection, in which the optimal feature subset acquired the best divergence is obtained according to interclass/intraclass distance of the training samples. This procedure is implemented by a Genetic Algorithm, with each possible feature subset encoded as chromosome. Fitness scores in GA are calculated and evaluated based on Jeffries-Matusita distance of the selected training samples.

然后，对这些线性光谱特征利用遗传算法结合训练样本计算类内/类间距离搜索最优分类子集，其具体染色体编码取可能的特征号，适应度函数基于样本平均Jeffries-Matusita距离计算。

For an objective comparison, the iteration numbers of these methods are: MLEM with 32iterations, OSEM with 4-subset 8 iterations and 2, 4, 8, 16, 20, 40-subset and 20 iterations, RAMLA with 4-subset and 8 iteration and relaxation parameter 0.5 and 1.5, respectively.

本研究取Inveon microPET扫描小鼠的正弦图，以MLEM、OSEM及RAMLA重建，MLEM叠代次数为32次；OSEM序列子集阶层为2、4、8、20、40，叠代次数为8、20次；RAMLA因定松弛系数为0.5、1、1.5，序列子集阶层4，叠代次数为8次。

CD8~+ cell is the main T lymphocyte subset in spleen, and B lymphocyte mainly is IgG~+ cell, moreover the amount of these B lymphocytes could exceed CD3~+ T lymphocyte subset after 7 days. CD8~+ cell is the main T lymphocyte subset in tonsil of appendix, and B lymphocyte is IgM~+ cell, and the amount could exceed CD3~+ T lymphocytes after 35 days. After 21 days, B lymphocytes in esophago tonsil are the main IgA~+ cells and the amount exceeds CD3~+ lymphocytes. The amount of CD4~+ lymphocytes is more than CD8+ lymphocytes.4. CD3~+、CD4~+ and CD8~+ T lymphocytes in spleen mainly distribute in periarterial lymphoid sheath. However IgM~+、IgG~+ and IgA~+ cells mainly distribute in ellipsoid periarterial lymphoid sheath and germinal center. T lymphocytes in appendix tonsil mainly distribute in middle and inferior part of mucous and the B lymphocytes mainly in middle and mucous between 4~7 days. Whereafter T, B lymphocytes equably distribute in mucous. CD4~+ cells arrange tightly and mainly occupy the central part in aggregates of T lymphocytes in esophago tonsil and CD8~+ lymphocytes mainly distribute in periphery. Meanwhile B lymphocytes encircle the periphery of aggregates of T lymphocytes. The aggregates of B lymphocytes is mainly the germinal center with lots of IgM~+、IgG~+ and IgA~+ cells. Meanwihle T lymphocytes encircle the periphery of aggregates of B lymphocytes.5. There is an intimate relationship between the development of tissue structure of peripheral immune organs and lymphcytopoiesis. The maturation of tissue structure is stimulated by the immigration of lymphocytes and the mature tissue structure provides place where lymphocytes grow mature and functionate.

脾脏在21日龄时达到稳定，食管扁桃体和盲肠扁桃体均在35日龄时达到稳定；脾脏中T淋巴细胞亚群以CD8~+细胞为主，B淋巴细胞则以IgG~+细胞为主，并在7日龄后数量超过CD3~+T淋巴细胞；盲肠扁桃体中T淋巴细胞亚群以CD8~+细胞为主，B淋巴细胞以IgM~+细胞为主，并在35日龄后数量超过CD3~+T淋巴细胞；21日龄后，食管扁桃体中B淋巴细胞以IgA~+细胞为主，数量超过CD3~+细胞，CD4~+细胞的数量多于CD8~+细胞。4、在T、B淋巴细胞组织定位方面，脾脏中CD3~+、CD4~+和CD8~+T淋巴细胞主要分布在动脉周围淋巴鞘中，而IgM~+、IgG~+和IgA~+细胞主要分布在椭球周围淋巴鞘和生发中心中；4～7日龄时，盲肠扁桃体中T淋巴细胞主要分布在粘膜固有层的中下部区域，而B淋巴细胞则主要分布在中上部区域，随后各日龄T、B淋巴细胞均匀地分布在粘膜固有层中；在食管扁桃体的T淋巴细胞聚集物中，CD4~+细胞紧密排列，主要占据中央部位，CD8~+细胞主要散布在外周，同时B淋巴细胞又环绕在整个T淋巴细胞聚集物的外周；B淋巴细胞聚集物主要为生发中心，其中存在大量IgM~+、IgG~+和IgA~+细胞，同时T淋巴细胞又环绕在整个B淋巴细胞聚集物的外周。5、外周免疫器官的组织结构发育和淋巴细胞发生之间存在密切的关系，淋巴细胞迁入淋巴器官刺激组织结构的发育成熟，同时成熟的组织结构又为淋巴细胞发育成熟并行使功能活动提供场所。

Tan and Xu [1] had proved the theorem on convergence of Ishikawa iteration processes of asymptotically nonexpansive mapping on a compact convex subset of a uniform convex Banach space , Then Liu Qihou [3] presents the necessary and sufficient conditions for the Ishikawa iteration of asymptotically quasi-nonexpansive mapping with an error member on a Banach space convergent to a fixed point . Xu and Noor [5] had proved the theorem on convergence of three-step iterations of asymptotically nonexpansive mapping on nonempty closed, bounded and convex subset of uniformly convex Banach space.

Tan和Xu已经证明了建立在一致凸Banach空间紧凸子集上的渐进非扩张映射的Ishikawa迭代序列的收敛原理，随之，刘齐侯又阐述了Banach空间上渐进准非扩张映射T的具误差的Ishikawa迭代序列收敛于T的不动点的充分必要条件；之后，Xu和Noor也证明了定义在一致凸Banach空间某非空有界闭凸子集上的渐进非扩张映射的三步迭代序列的收敛原理。

Inspired by these results, in this paper, we first give the definition of a new mapping ? uniformly Lipschitz asymptotically nonexpansive mapping on a compact subset of a uniform convex Banach space, then construct three-step iterative sequences of uniformly Lipschitz asymptotically nonexpansive mapping in this subset . We proved the convergence of this three-step iterative sequences for uniformly Lipschitz asymptoticallynonexpansive mapping, Further more, we proved this three-step iterative sequences with an error member converge to fixed points.

从中得到启发，在本文我们首先定义了一致凸Banach空间某非空紧子集上的一种新的映射——一致李普希兹渐进非扩张映射，在该紧子集上构造关于一致李普希兹渐进非扩张映射的三步迭代序列以及具误差的三步迭代序列，先来讨论三步迭代序列的收敛性，进而讨论具误差的三步迭代序列的收敛性。

In order to find a stable approximate solution of linear compact operator equation, the article introduces general theories about ill-posed problems, it bases on spectral theory of self-adjiont compact operators and the singular value decomposition for compact operators, avails singular system to give expression of the solution, and explains ill-posedness of compact operator equation roots in the property that the singular values trends to zero. Thereout, it is provided with theoretic support of building up regularization method by inducting regularization filter to weaken or filtrate the influence that the nature of the singular value being very close to zero has on the solutions stability.

为了得到线性紧算子方程稳定的近似解，介绍了不适定问题正则化的一般理论，以自伴紧算子的谱分析与紧算子奇异值分解为理论基础，利用奇异系给出了解的表达式，说明了紧算子方程不适定性的根源在于紧算子的奇异值趋于零的性质，由此通过引入正则化滤子函数来减弱或滤掉奇异值趋于零的性质对解的稳定性的影响，构造正则算子，从而提供了建立正则化方法的理论依据。

Every weakly countably compact closed convex set in a locally convex space has the quasi-weak drop property.

局部凸空间中每个弱可数紧闭凸集具拟弱滴状性质。

Use nationalization degree and the relationship that commercialize degree, condition of calculable market economy plays scope of optimal and state-owned economy.

利用国有化程度与市场化程度的关系，可计算市场经济条件下最佳国有经济规模。

The kinds of extractant also effected desulfurization rate .

萃取剂对脱硫率的影响也很大，乙二胺的萃取效果优于甲醇的。