不同剂量头孢三嗪对呼吸道感染的疗效观察

为观察两种不同剂量头孢三嗪的临床疗效,随机选择７０ 例呼吸道感染患者,分别采用每日２ｇ 和４ｇ 两种剂量治疗（疗程６～１４ｄ）。结果两组有效率分别为８５７％ 、８８６％ ,两组在治愈、显效、无效等方面相比无显著性差异,细菌清除率分别为９１３％ 、８７５％ （ Ｐ＞ ０．０５）。说明头孢三嗪每日２ｇ 可取得满意的临床疗效     

航空货运客户细分与客户价值分析方法

为了航空货运企业保留和争取有价值客户,根据航空货运主要客户是货运代理的特点,采用价值与忠诚度2个维度,将航空货运客户细分为8类,提出了对8类货运代理客户的相关营销策略;在现有客户价值计算公式中加入了航班载运率的影响项,使之适合于航空货运业,为航空货运客户细分提供依据。计算结果表明：考虑和不考虑航班载运率的影响使客户价值相差近1／3,因此引进航班载运率的影响可更加正确地计算客户价值和正确地划分客户类型。     

武器装备关联性评价模型研究

武器装备之间的关联性影响武器装备之间的相互协调。建立了武器装备关联性评价的系统结构模型,并针对系统结构模型中的粗糙度缺点,对模型权重系数进行了改进,并对改进的可行性进行说明。     

浙江省水运发展与经济发展的关系分析

以浙江省港航水运建设与经济数据为基础,分析了港航发展和区域经济发展之间的关系。指出港航水运建设促进了海洋产业现代化、物流发展及城市化进程,拉动区域经济发展。同时经济发展又为港航发展提供了物质基础及技术支撑。     

An analysis of airport–airline vertical relationships with risk sharing contracts under asymmetric information structures

We analyze the double moral hazard problem at the joint venture type airport–airline vertical relationship, where two parties both contribute efforts to the joint venture but neither of them can see the other’s efforts. With the continuous-time stochastic dynamic programming model, we show that by the de-centralized utility maximizations of two parties under very strict conditions, i.e., optimal efforts’ cost being negligible and their risk averse parameters both asymptotically approaching to zero, the vertical contract could be agreed as the optimal sharing rule, which is the linear function of the final state with the slope being the product of their productivity difference and uncertainty (diffusion rate) level index.If both parties’ productivities are same, or the diffusion rate of the underlying process is unity, optimal linear sharing rule do not depend on the final state. If their conditions not dependent on final state are symmetric as well, then risk sharing disappears completely. In numerical examples, we illustrate the complex impact of uncertainty increase and end-of-period load factor improvement on the optimal sharing rule, and the relatively simple impact on total utility levels.     

Empirical flow-density and speed-spacing relationships: Evidence of vehicle length dependency

Traffic flow theory has come to a point where conventional, fixed time averaged data are limiting our insight into critical behavior both at the macroscopic and microscopic scales. This paper develops a methodology to measure relationships of density and vehicle spacing on freeways. These relationships are central to most traffic flow theories but have historically been difficult to measure empirically. The work leads to macroscopic flow-density and microscopic speed-spacing relationships in the congested regime derived entirely from dual loop detector data and then verified against the NGSIM data set. The methodology eliminates the need to seek out stationary conditions and yields clean relationships that do not depend on prior assumptions of the curve shape before fitting the data. Upon review of the clean empirical relationships a key finding of this work is the fact that many of the critical parameters of the macroscopic flow-density and microscopic speed-spacing relationships depend on vehicle length, e.g., upstream moving waves should travel through long vehicles faster than through short vehicles. Thus, the commonly used assumption of a homogeneous vehicle fleet likely obscures these important phenomena. More broadly, if waves travel faster or slower depending on the length of the vehicles through which the waves pass, then the way traffic is modeled should be updated to explicitly account for inhomogeneous vehicle lengths.     

供应链合作关系质量的测量指标体系构建--基于近关系理论的研究

如何客观评价供应链上合作企业之间的关系对企业提高竞争力，应对市场不确定性，快速满足顾客个性化需求，实现供应链上企业的共赢具有重要意义。针对目前对关系质量研究从合作结果出发的现状，根据社会心理学中从合作关系特点出发的近关系理论对关系质量的界定，对关系强度、关系持久性、关系频率、关系灵活性、关系多样性和关系公平性6个维度提出具体的衡量指标，构建了供应链合作关系质量测量指标体系。为了克服单一权重确定方法的局限，提出了三角模糊数层次分析法和熵值法组合赋权的关系质量测量方法，通过与三角模糊数层次分析法的指标权重计算结果进行对比分析，证明该方法的有效性和必要性。     

基于实测数据的路段可靠性近似算法研究

利用北京市快速路与主干路的流量与车速实测数据,分析交通流量的变化规律,拟合流量-速度关系;分别采用车速和流量计算可靠度与饱和度,得到欠饱和与超饱和状态下可靠度与饱和度之间的一一对应关系,从而建立可靠度与饱和度之间的关系模型;最后利用实测数据对该模型进行了验证,结果表明快速路最大误差为0．0885,主干路最大误差为0．0923．     

大件重载道路挡土墙结构有限元分析

对于西南山区某火电厂大件设备运输道路的挡土墙进行针对性分析。在合理模拟重载效应的前提下选取典型挡土墙断面,采用有限元软件模拟重载传递到路基中,在分析填土、墙体及重载作用效应的基础上,对挡土墙的内力及稳定性进行分析。该方法不仅可以考虑土与墙体的本构关系,还可以合理地反映界面的力学效应。     

基于供应链的造船企业供应商关系管理研究

文章基于供应链的内涵,以当前造船企业供应商关系管理所面临的难题为切入点,从造船企业供应商关系管理的现状与存在的问题出发,阐述加强供应商关系管理的重要意义,提出了造船企业供应商关系管理的考评、激励、开发等一系列方法与策略。