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从双向编组站运输生产实际情况出发,以最大化车站发出车数和最小化车辆在站平均停留时间(中时)为目标,综合考虑解体、编组调机能力限制、到发列车车流接续、车流在站停留时间约束的影响,建立了车站货运列车编组调度问题的多目标非线性混合整数规划模型,结合该优化模型难以求解的特点,将编组调度问题分解为配流、待解车列解体和待编车列编组三个子问题,进而设计了求解该问题的分层启发式算法,对正常和特殊运输组织条件下的列车编组调度问题进行了求解. 相似文献
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In this paper, we get a lower bound on the genera of surfaces re, presenting certain divisible classes in some 4-manifold X with Hi(X; Z) finite. 相似文献
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本文讨论一类奇异二阶常微分方程的边值问题,其中非线性项f(t,u)在u=0处及在t=0,1处都具有较高的奇性.应用现有的存在性结果无法得出这类方程的解.利用锥上的不动点定理及解的细致先验估计得到了正解的存在性. 相似文献
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浅海遥感图片海底研究 总被引:1,自引:0,他引:1
利用海洋水色进行浅海水深反演,国内外已经提出了很多方法,并建立了各种模型。在他们的反演系统中,无一例外的要运用不同的水下测试仪器进行某些信息的提取,利用提取的信息确定参数,从而完成水深反演。在脱离任何水下测试仪器的情况下,仅通过卫星图片或航空图片提取浅海水深信息,利用海洋水色变化的基本原理,讨论了辐照度与波长以及水深的关系,模拟了浅海水下地形,并通过三维立体形式演示海底地貌。以遥感图片和数码照片为例,分别模拟了所拍摄地区的浅海海底概貌。结果表明,此方法具有一定的可行性,可以进行更深层次的研究,并可应用于航海安全保证、大陆架遥感测绘和环境检测等多个领域。 相似文献
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THE CONTRIBUTION OF THE NUCLEON EXCHANGE TO THE TRANSFER OF IN DEEP ANGULAR MOMENTUM AND ENERGY INELASTIC COLLISION 下载免费PDF全文
The nucleon exchange can be divided into two different modes, the equal one and unequal one. Assuming that the motion of nucleon is random and according to Einstein relation the number of equal and unequal exchange is discussed. The total energy loss and the angular momentum for the reaction Kr+Kr have been calculated. The results. show that the total energy loss is only partly induced by nucleon exchange, while the. angular momentum dissipation is mainly induced by nucleon exchange and the equal exchange is more important than unequal one in both cases. 相似文献
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In this paper we give a strong converse inequality of type B in terms of unified K-functional Kαλ(f,t2) (0 ≤ λ ≤ 1,0 < α < 2) for the Meyer-K?nig and Zeller-Durrmeyer type operators. 相似文献
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Extending the elementary amplitude in the Glauber Theory and using α-α scattering amplitude as the elementary amplitude, the high energy nuclei-nuclei collision is discussed. In this paper, high energy alpha scattering by C12 is calculated in detail and satisfactory results are obtained. 相似文献
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In this work we discuss the existence of ψ-bounded solutions for linear difference equations. We present a necessary and sufficient condition for the existence of ψ--bounded solutions for the linear nonhomogeneous difference equation x(n+1)=A(n)x(n)+f(n) for every ψ-bounded sequence f(n). 相似文献