新铺轨道预留轨缝加大值定量分析

提出一种定量分析新铺轨道预留轨缝加大值的方法 ,对《铁路轨道施工及验收规范》(TB10 30 2 96 )中第 3 .3 .15条给出精确值解法。

Early Development of Silvetia babingtonii(Fucales, Phaeophyceae)

Silvetia babingtonii is a potentially economic brown alga for sources of food and high-value added utilization. So far, sporeling nursery and field cultivation has not been successful. The lack of knowledge on development and life cycle of this alga hinder the development of techniques for the sporeings and cultivation. In this study, internal structure of oogonium and antherium of S. babingtonii was observed with hematoxylin and eosin staining and through microscope. Meanwhile, early development from zygotes to juvenile sporelings was studied at 20℃ under 60–100 μmol photons m-2 s-1. Zygotes germinated and divided into thallus and rhizoid cells. The larger thallus cells further divided and developed into juvenile sporelings; while the smaller rhizoid cells divided and elongated into rhizoid hairs. These findings documented the life cycle of S. babingtonii and provided fundamental knowledge for sporeling nursery in the near future.

Affects of Marshall Plan on Turkish Economy

Marshall Plan is an important declaration that dominated world economy and politics after the World War II. It is also evidence that policy of the United States of America to make for its internal politics between two world wars was abandoned and it was intended to dominate world politics. Likewise, it can be considered as the smoking gun for power loss of continental Europe, including England, against the Soviet Union. When Turkey had to find its way into Western alliance in this new period divided into two poles and called as ＂Cold War＂, it intended to enter into economic acquis formed by Marshall Plan. Turkey, in the process to prevent the spread of communism against the Soviet Union that started mainly by Truman Doctrine, was of the first priority status by the USA just like Greece. It can be said that Turkish economy made an important progress to move into liberal system from its statist structure through Marshall Plan. Accession process to European Union integration mandated by the USA was started by Republican People＇s Party （CHP） and it was also continued in Democratic Party period with liberal program that took over the power as a result of elections in Turkey. Although Marshall Plan created economic added value in Turkey at the beginning, it could not create a sustainable welfare process as consultants coming from the USA had insisted on unilateral economic policies and Turkey was directed towards military spending due to being seen mainly as a buffer state against the Soviet Union and Middle East. It can be also said that arrangements arising from double standards in the application compared to European countries caused economic instabilities in the long run.

ON APPROXIMATION OF MAX n/2-UNCUT PROBLEM

Using outward rotations, we obtain an approximation algorithm for MAXn/2-UNCUT problem, i.e., partitioning the vertices of a weighted graph into two blocks of equalcardinality such that the total weight of edges that do not cross the cut is maximized. In manyinteresting cases, the algorithm performs better than the algorithms of Ye and of Halperin andZwick. The main tool used to obtain this result is semidefinite programming.

On Stabilization of It Stochastic Time-Varying Systems

The stabilization with receding horizon control （RHC） of It5 stochastic time-varying systems is studied in this paper. Based on monotonically non-increasing of optimal cost and stochastic Lyapunov stability theory, a necessary and sufficient stabilization condition on the terminal weighting matrix is proposed, which guarantees the mean-square stability of the closed-loop system. The explicit receding horizon controller is obtained by employing stochastic maximum principle. Simulations demonstrate the effectiveness of the proposed method.