铅球运动的力学原理与技术

用力学原理分析了铅球的运动,得到在空气阻力情况下投掷距离与出手高度,出手初速度和出手角度的函数关系,并对最佳出手角,技术要领作了简要讨论。     

柴油机供油系统中压力波信号的小波分析

通过压力传感器、放大器、A/D卡和计算机对柴油机供油系统中泵端和嘴端压力波信号进行了采集 ,然后用小波分析法对其时频特性进行了研究。研究结果表明 :通过小波变换 ,可将柴油机供油系统中压力波信号的各个频带成份清晰地显示出来 ,并可以看出泵端和嘴端压力波在小波分析后的差别     

考虑运输损耗和运输成本的多状态配送网络可靠性评估

在考虑运输损耗和运输成本约束情形下,提出多状态配送网络可靠性评估方法。通过引入损耗因子刻画运输损耗,进而根据需求流量和运输损耗建立流分配策略;基于此分配策略、运输边容量约束以及运输成本约束,提出计算配送网络可靠性的极小容量向量方法。通过实例分析验证了算法的有效性,并从可靠性视角探讨了关键运输边的识别方法,研究成果可为管理者在配送网络运维方面提供决策指导。     

微针给药系统的研究进展

微针是一种具有微米尺度的经皮给药技术,从内部结构可分为实心与空心微针.制作微针的材料主要有硅、金属、聚合物等.微针增强了皮肤对药物尤其是大分子药物的渗透性,不会到达神经分布丰富的皮肤深层组织,并且使用方便,因此是一种高效、无痛、安全的经皮给药方式.微针在胰岛素给药、卵清蛋白的免疫接种、缓控释给药、微量输液等方面的研究为微针经皮给药提供了应用可能.     

pH-responsive vaccine delivery systems for improving cellular immunity

Immune vaccination is a critically important strategy in disease prevention and treatment. In vaccination, efficient vaccine carriers are necessary to augment the immune response initiated by vaccines generally with weak immunogenecity. Nowadays, commercially available vaccine/carrier formulations induce effective humoral immunity but weak or none cellular immunity. However, in practice, cellular rather than humoral immunity plays the key role in treating some intractable diseases such as AIDS and cancers, in which the elicited cytotoxic T lymphocytes can directly kill HIV-infected or cancer cells. To trigger potent cellular immunity, the carriers should help antigens escape from endosomal/lysosomal degradation and release them directly into the cytosol of antigen presenting cells. To this aim, such kind of vaccine carriers should be rationally designed and prepared in terms of their structure and physiochemical properties. Here, we summarized the recent advances in pH-responsive vaccine carriers exclusively developed for improving cellular immunity.     

卫星观测系统整体调度的收发问题模型及求解

探讨了一类涉及多星、多地面站、多任务的卫星观测系统整体调度问题,该问题要求从过多赋权卫星观测需求中,选择有能力完成的一个任务子集,并为相应的拍照和数据下传活动安排资源和时间,以实现特定的优化目标.用一种变体形式的收发问题模型描述了该问题,并给出了其约束规划和禁忌搜索相结合的求解方法.最后用随机生成的问题示例检验了求解算法的性能.     

论高校图书馆网络环境下的文献传递工作

本文对目前国内高校图书馆文献传递工作的现状做了简要的介绍,分析网络给文献传递工作带来的机遇,详细说明网络环境下文献传递工作的实务,并对如何提升文献传递服务的效果提出看法.     

“互联网+”环境下项目管理新模式

建立了一种"互联网+"环境下项目管理新模式.首先分析项目管理新模式的演进方法,并在"互联网+"的大环境下选择集成项目交付(IPD)模式作为新模式产生的基础.接着论述"互联网+"对IPD模式的技术支撑和实施流程两方面的改进.在此基础之上,提出了以IPD模式为核心交付方法,以建筑信息模型(BIM)技术和"互联网+"相关技术为技术支撑的项目管理新模式,并总结了新模式的关键要素.最后,通过专家研讨验证了新模式的可行性、先进性和可操作性.     

Delivery mode selection of home furnishing e-retailer based on a combination of logistics delivery and installation service

With the increasing demand for online home-furnishing products, product delivery services, especially installation services, have become increasingly regarded as bottlenecks and key factors for success. Meanwhile, customers have different preferences for a combination of delivery modes because of separated or synchronized logistics delivery from installation services. It is essential for online home-furnishing e-retailers to self-build or outsource installation services. This study investigates the optimal delivery mode selection of home-furnishing e-retailers in a home-furnishing supply chain consisting of a home-furnishing e-retailer, a third-party installation service provider (ISP), and a third-party logistics service provider (LSP). Specifically, we explore three alternative modes: (ⅰ) The home-furnishing e-retailer undertakes the installation service (Mode E); (ⅱ) the ISP undertakes the installation service (Mode I); (ⅲ) the LSP undertakes the installation service (Mode L). The results reveal that the self-build mode does not always generate the highest installation service level, and the integrated delivery mode may generate the highest installation service level when the cost performance of the installation service is relatively low. Moreover, optimal delivery mode selection depends on the installation service’s cost performance. When the installation service’s cost performance is relatively low, the e-retailer and the LSP reach a “win-win” situation from the integrated delivery mode. When the installation service’s cost performance is relatively high and the self-build fixed cost is low, the e-retailer and the LSP reach a win-win situation from the self-build mode. Interestingly, compared with the outsourced integrated service mode, the self-build integrated service mode is not a better choice for the e-retailer if the self-build fixed cost is too high. Our study contributes to the growing literature on home furnishing and guides the implementation of delivery strategies for large-product online retailers.     

Z=5和6扇形滑块泵流量脉动分析

研究Z=5和6扇形滑块泵的瞬时流量,流量脉动串和流量脉动频率,建立相应的数学模型,为5,6扇形滑块泵设计计算提供理论依据。