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L-B型组合式制动梁自投入运用以来,其结构经多次改进后已基本定型,段修工艺也已基本成熟,但相应的检修手段与工艺装备还不能完全满足检修的需要.为此,笔者对L-B型组合式制动梁在段修中存在的一些问题进行了统计分析,并提出了相应的改进建议. 相似文献
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Shor proposed a polynomial time algorithm for computing the order of one element in a multiplicative group using a quantum computer. Based on Miller's randomization, he then gave a factorization algorithm. But the algorithm has two shortcomings, the order must be even and the output might be a trivial factor. Actually, these drawbacks can be overcome if the number is an RSA modulus. Applying the special structure of the RSA modulus, an algorithm is presented to overcome the two shortcomings. The new algorithm improves Shor's algorithm for factoring RSA modulus. The cost of the factorization algorithm almost depends on the calculation of the order of 2 in the multiplication group. 相似文献
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分析了目前货车转向架检修中存在的问题,介绍了货车转向架检修工艺线设计的成功范例,并提出了优化设计的建议。 相似文献
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单向交通组织可以改善城市交通拥堵和提高路网利用率,因此,在交通组织管理方案实施前就应对其进行评价与完善,综合分析道路单向运行后的各交通参数,优化单向交通方案,是单向交通组织成功的必要前提。采用美国Caliper公司开发的交通软件TransCAD,对单向交通组织方案进行仿真,通过对比评价组织方案实施后的综合交通效益,确定单向交通组织方案的优劣。 相似文献
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Introduction Factoring integers is generally thought to behard on a classical computer. But it is now heldthat prime factorization can be accomplished inpolynomial time on a quantum computer. This re-markable work is due to Shor[1]. For a given num-ber n, he gave a quantum computer algorithm forfinding the order r of an element x (mod n) insteadof giving a quantum computer algorithm for factor-ing n directly. The indirect algorithm is feasiblebecause factorization can be reduced to finding th… 相似文献
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列车提速以来,转8A转向架承载鞍挡边折断故障不断增多,对行车安全和运输畅通影响很大. 1调查统计 笔者对阜阳北编组站列检所2000年7月至12月间发现的转8A型转向架承载鞍故障情况进行了调查统计,统计结果见表1. 从表1中可以看出,承载鞍故障主要是挡边裂折故障,约占总故障数(68起)的96%,其中已经折断的约占74%. 相似文献