行为艺术在中国遭受拒斥原因之分析

行为艺术作为一种独特的艺术形式，本该在艺术史上处于重要地位，然而当它登陆中国之后，却遭到了高雅艺术审美和通俗大众审美的双重拒斥。这一现象，与其“表现的失当”和“过度的解构”有着密切关系，本文将对此进行细致分析。     

Stability of Jackson Type Network Output

We consider an open Jackson type queueing network N with input epochs sequence I={T _n ⁽⁰⁾,n0}, T ₀ ⁽⁰⁾=0, assume another input ={ _n ⁽⁰⁾} and denote _k =| _k ⁽⁰⁾–T _k ⁽⁰⁾|, ₀=0, _n =max_{1kn k} , n1. Let {T _n } and { _n } be the output points in network N and in modified network, with input , accordingly. We study the long-run stability of the network output, establishing two-sided bounds for output perturbation via input perturbation. In particular, we obtain conditions that imply max _kn |T _k – _k |=o(n ^1/r ) with probability 1 as n for some r>0. This result is also extended to continuous time. We consider successively separate station (service node), tandem and feedforward networks. Then we extend stability analysis to general (feedback) networks and show that in our setting these networks can be reduced to feedforward ones. Similar stability results are also obtained in terms of the number of departures. Application to a tandem network with the overloaded stations is considered.     

Studying an overload system using rotation

1. IntroductionThe motivation of writing this paper was from calculating the blocking probability foran overloaded finite system. Our numerical experiments suggested that this probability canbe approximated efficiently by rotating the transition matrix by 180". Some preliminaryresults were obtained and can be found in [11 and [2]. Rotating the transition matrix definesa new Markov chain, which is often called the dual process in the literature, for example,[3--7]. For a finite Markov chain, …     

航海与海上保险

主要探讨航海与海上保险的关系，阐明海上保险业是伴随航海的发展、频率的海上商业活动而混合产生。文中着重于海上保险业的起源，海上保险制度，我国保险制度的沿革、我国的海上保险和我国航海业与海上保险业的共存发展等内容的探讨。     

托运人联盟下的订单组合及车货调配问题研究

中小型企业的快速发展使得如何有效利用其物流资源、降低其物流成本成为一个亟需解决的问题。本文基于运输联盟的角度,建立了以最小化总成本为优化目标,综合考虑各运输需求时间窗、运输量等因素的车货调度模型。而后,提出了3种时间窗处理策略,设计了粒子群算法对上述模型进行求解,并通过算例对模型和算法的有效性进行了分析。算例结果表明,该模型一方面能够显著降低物流总成本,另一方面可有效节约使用车辆数。因此,本文研究对降低社会物流成本、整合社会物流资源具有一定的理论意义。     

Improvement of separation in zonal preparative thin-layer chromatography by gradient elution

Summary Complex extracts of the plants Azulan and Hemorigen were separated by zonal micropreparative thin-layer chromatography in sandwich chambers of the ES and DS type which permitted zonal application of large volumes of sample, without auxiliary equipment. Application from the edge of the layer, in the frontal chromatography mode, markedly improved the separation efficiency and capacity owing to displacement effects which narrow the initially broad zones. Further improvement of separation efficiency and purity of fractions, revealed by densitometry, was observed using stepwise gradient elution. This was confirmed by extraction of some of the separated fractions from the layer and rechromatography; the composition of these fractions were generally simpler than for the corresponding isocratic chromatograms.     

航空货运站物流监控系统通讯协议设计

根据监控计算机和PLC之间的通讯原理,针对航空货站多工位、多路径、多任务实时监控特点,设计航空货运物流监控系统通讯协议.分析设备监控管理层与设备控制层PLC信息交换过程以及航空货运站物流监控的需求.按照标准化、可扩展的要求,设计运动指令和状态指令报文数据结构及相应的报文类型.实际应用表明,该通讯协议能够很好地满足复杂物流监控需求,信息容量大,格式规范新颖,便于软件实现.     

腹地经济转型对宁波-舟山港发展的影响

基于腹地经济特点及转型发展趋势,分析了经济转型可能对宁波-舟山港货物吞吐量、航线挂靠、增值服务能力以及港口相关产业结构等产生的影响,为进一步确定港口发展战略,提升港口服务能力,促进国际强港建设提供参考.     

件杂货港口仓储和排船一体化物流管理

探讨了港口件杂货物流系统的构成、业务流程、成本结构和运作机制;秉承物流一体化的管理思想,运用优化理论建立了件杂货港口的仓库管理和待泊船舶遴选的数学模型;结合港口的管理实践进行了案例分析;研究结果表明,模型具有有效性和可操作性.     

考虑货物冲突关系的二维装箱问题研究

货物冲突及其处理方式直接影响货箱消耗量和货物装载成效, 通过构建冲突矩阵和“冲突货物不能放置同一货箱内”处理方式, 同时考虑负载安全因素, 建立了考虑货物冲突关系的二维装箱优化模型. 设计了改进的模拟退火算法, 其运用贪心算法对货物冲突预处理, 确保初始装箱序列为可行解; 提出了兼顾当前温度和适应度影响的动态随机扰动率 方程, 增强了邻域解的搜索能力, 改善了算法整体性能. 算例分析表明模型和算法有效. 120种货物冲突稀疏度[0.1,0.9]情景下, 货箱面积利用率均值为[0.342,0.732], 降低了装载单元使用数量, 提高了资源利用率. 不同样本量情景下, 改进算法的求解质量和运行效率表现良好.