浅谈低等级公路改建为一级公路的几点思考

针对目前国、省道等干线公路沿线集镇化严重的现状，探讨了低等级公路改建为一级公路的方法，提出应合理确定道路的设计速度，优化路基标准横断面布置，合理确定平交口的设置间距，以期实现“民生交通”“低碳交通”。     

二维几何构形

本文讨论由多个零件组成的两组任意平面图形进行并、交、差、外延和内含等5类运算的算法:各零件之间的相对位置关系,归结为相交、分离、内含和重合等4种状态的任意组合;而零件则由内环、外环和虚环等构成;将圆弧作为基本元素直接参加运算。提出并解决了“奇异重点”、“第二类奇异重点”和“虚环”等问题;整个工作成功地与Auto CAD进行了联接。     

参数型非空交定理及其在变分不等式理论中的应用

在已经证明的广义区间空间中几个参数型非空交定理的基础上，利用这些结果得到了广义区间空间中变分不等式解的存在性定理。这一研究成果推广了ＹｅｎＣＬ１９８１年所发表的“极大极小定理及其在变分不等式中的应用”一文中的定理３。     

Plastic deformation kinetics of electrodeposited Cu foil at low and intermediate homologous temperatures

The plastic deformation kinetics of electrodeposited (EP) Cu foil (grain size d=0.6 μm) were determined at 296–448 K and compared with those for vapor-deposited (VP) foil (d=0.5 μm) tested at 77–473 K. The apparent activation volume v=kT ∂ ln for both materials exhibited a minimum at ∼350 K, and at this temperature, there occurred a marked increase in the temperature dependence of the flow stress σ. The rate-controlling mechanism in both materials at T<373 K appears to be grain boundary shear induced by dislocation pileups at the grain boundaries. The results at T=373–473 K suggest that the dislocation pileups are relieved or prevented and that either cross slip or intersection of dislocations is rate controlling with stronger support for the latter. The determination of the rate-controlling mechanism at the higher temperatures is complicated by possible changes in defect structure due to thermal annealing, and therefore, the operative mechanism corresponds to a structure that may differ from the initial, as-deposited condition.     

基于一种新的混合算法的交通流控制优化模型

运用交通流控制理论建立了在交叉口空间渠化及信号相位相序给定的条件下, 考虑机动车与非机动车的延误（服务水平）约束条件, 机动车通行能力最大的优化模型, 并利用遗传算法及混沌优化算法互补的混合优化算法对模型进行了优化计算. 实际优化计算结果表明, 文中的优化模型及其混合算法具有较高的理论价值及实用价值, 本次研究为信号交叉口交通流的协调控制优化研究提供了新思路和新方法.     

大屋盖网架安装检测方法及精度分析

为确保深圳市民中心大屋盖网架的安装质量,发挥结构的受力作用,运用前方交会法来确定球心节点的几何中心.对不同测量图形、不同交会点的测量精度进行分析,得出其交会角为108°00′28″时,其测量度最高.在考虑图形强度的前提下,对该工程542个节点均进行了观测,其点位误差绝大多数在1cm以下,最大为1.8cm,测量精度和安装工程质量均达到了预期目的.     

pn中生成子空间的交与和的基与维数

在线性空间的讨论中,有几个重要的子空间:生成子空间,子空间的交与和.对于有限维线性空间,确定它的维数与一组基是一个关键,故而重点讨论在有限维线性空间中,如何来确定生成子空间交与和的基与维数.     

后方交会在施工测量中的应用

本文结合工程实例介绍了采用后方交会法进行建筑物放样的方法 ,解决了复杂施工场地上测量控制点难以保存的问题。     

非机动车因素对交叉口机动车运行的影响

研究了非机动车因素即自行车与行人因素对城市道路灯控平面交叉与立体交叉处机动车流运行的影响,通过现场调查数据,定义并计算出定量影响系数,将这些系数作为修正系数用于交叉口机动车通行能力计算公式中,以对混合交通条件下城市道路交叉口机动车通行能力理论进行修正与完善。     

Genomic data privacy-preserving scheme based on the improved PSI protocol

In order to solve the problem of privacy leakage in the sharing of genomic data, a genomic data privacy-preserving scheme based on the improved Private Set Intersection (PSI) computing protocol is presented, which leverages the Bloom Filter, Cuckoo Hash, and Random Oblivious Transfer (ROT) extension protocol to not only protect the genomic sequence information on the user when detecting a disease-causing gene but also judge whether he or she has some disease factors or not. Moreover, the correctness and security of the proposed scheme in the detection scenario of disease-causing genes are proved in the semi-honest security model. In addition, a series of experiments is conducted to verify the efficiency of the proposed scheme. The results reveal that the running time and communication overhead of the proposed scheme are much less than those of the existing PSI schemes.