Reliability Analysis of Supply Chain System with the Multi-Suppliers and Single Demander

The time-dependent solution of a kind of supply chain system with the multi-suppliers and single demander is investigated in this paper. By choosing state space and defining operator of system, we transfer model into an abstract Cauchy problem. We are devoted to studying the unique existence of the system solution and its exponential stability by using the theory of C_0-semigroup. We prove that the system operator generates C_0-semigroup by the theory of cofinal operator and resolvent positive operator. We derive that the system has a unique nonnegative dynamic solution exponentially converging to its steady-state one which is the eigenfunction corresponding eigenvalue 0 of the system operator.     

基于Keil C51的单片机仿真器的研究与实现

文章基于Keil C51软件编译系统,论述了51系列单片机仿真器的设计思路和实现方案。该装置是一款物美价廉的单片机软、硬件的学习工具和开发工具,有着重要的使用价值和推广价值。     

基线漂移对长周期反应谱的影响

采用Hilbert-Huang变换,对数字强震仪记录进行了分析,得到了几个典型记录的最低频固有模态函数(IMF),比较了常规处理记录和去除最低频IMF的记录加速度反应谱的差别,这种差别很小。据此得出了记录基线漂移对长周期反应谱的影响很有限的结论,指出数字化强地震动记录在长周期段是可靠的,设计反应谱可向长周期扩展。     

多元合金的电子、原子层次理论计算及应用

本文是在电子、原子层次上进行多元合金设计的一个初步探索。利用量子化学从头计算方法或者第一性原理赝势平面波方法,构建了多元合金的原子间相互作用势。研究表明,由原子间相互作用势计算确定合适的基体成分,选择尝试的合金总成分,通过经验公式计算碳化物体积分数,以相平衡热力学计算取得与合适的相结构对应的合金总成分．由试验检验设计的合理性。这样的一种思路是可行的。     

A genetic interaction network of five genes for human polycystic kidney and liver diseases defines polycystin-1 as the central determinant of cyst formation

Autosomal dominant polycystic liver disease results from mutations in PRKCSH or SEC63. The respective gene products, glucosidase IIβ and SEC63p, function in protein translocation and quality control pathways in the endoplasmic reticulum. Here we show that glucosidase IIβ and Sec63p are required in mice for adequate expression of a functional complex of the polycystic kidney disease gene products, polycystin-1 and polycystin-2. We find that polycystin-1 is the rate-limiting component of this complex and that there is a dose-response relationship between cystic dilation and levels of functional polycystin-1 following mutation of Prkcsh or Sec63. Reduced expression of polycystin-1 also serves to sensitize the kidney to cyst formation resulting from mutations in Pkhd1, the recessive polycystic kidney disease gene. Finally, we show that proteasome inhibition increases steady-state levels of polycystin-1 in cells lacking glucosidase IIβ and that treatment with a proteasome inhibitor reduces cystic disease in orthologous gene models of human autosomal dominant polycystic liver disease.     

Binary Particle Swarm Optimization Based Hyper-Heuristic for Solving the Set-Union Knapsack Problem

The set-union knapsack problem(SUKP) is proved to be a strongly NP-hard problem, and it is an extension of the classic NP-hard problem: the 0-1 knapsack problem(KP). Solving the SUKP through exact approaches is computationally expensive. Therefore, several swarm intelligent algorithms have been proposed in order to solve the SUKP. Hyper-heuristics have received notable attention by researchers in recent years, and they are successfully applied to solve the combinatorial optimization problems. In this article, we propose a binary particle swarm optimization(BPSO) based hyper-heuristic for solving the SUKP, in which the BPSO is employed as a search methodology. The proposed approach has been evaluated on three sets of SUKP instances. The results are compared with 6 approaches: BABC, EMS, gPSO, DHJaya, b WSA, and HBPSO/TS, and demonstrate that the proposed approach for the SUKP outperforms other approaches.     

基于网络局部和全局特性的组合中心性度量措施

阐述了复杂网络中节点的中心性(即节点的重要性)对网络鲁棒性的重大影响,评估节点的多种重要性方法各自的优点与局限性.结合逆和指数ISI、度中心性DC以及介数中心性BC提出一种基于两种人工网络和两种真实网络的组合中心性度量方法IDB,利用删除节点前后网络的最大连通子图的变化对节点的重要性进行刻画仿真实验,验证了该方法的可行...     

A New Theoretical Framework of Pyramid Markov Processes for Blockchain Selfish Mining

In this paper,we provide a new theoretical framework of pyramid Markov processes to solve some open and fundamental problems of blockchain selfish mining under ...     

浅谈寒冷地区大体积砼冬季施工技术

文章重点介绍了寒冷地区侯家沟大桥承台大体积砼施工技术方案及实施工艺。     

太阳能在公路交通领域中的应用

太阳能以其节能、清洁、零排放、来源广泛、安全等特点,成为目前各种新能源中越来越受重视的一种绿色能源。通过对太阳能设施在公路交通各领域中的应用分析,提出了缓解交通能源危机及交通环境问题的新思路。