The role of fundamental motivations in willingness-to-pay online

This study aims to determine whether an understanding of chronic fundamental consumer motivations can help determine the mechanisms of willingness-to-pay for products online. To do so, it employs a simulated buying task on a fictional e-commerce site for a consumer product (branded either as a “new arrival” or a “classic”) to investigate the effects of two fundamental motivations (mate acquisition vs. self-protection) on willingness-to-pay for the product online. The primary focus of the paper to investigate the capacity of mate acquisition and self-protection motives to moderate the relationship between attitude toward the product and willingness-to-pay, as well as, the effects of the motives on willingness-to-pay are considered. Through regression and interaction effect analyses, it is shown that chronic fundamental motivation for mate acquisition is directly correlated with an increased willingness-to-pay for both product types, and it moderates the relationship between attitude toward a product and willingness-to-pay. Self-protection motivation increases willingness-to-pay for classic products but not new arrivals. By offering a rare look at chronic fundamental motivation in the consumer context and potentially being the first investigation of the moderating effects of fundamental motivations, the results mostly support the notion of predictable motivation induced behavioral tendencies.     

微纳卫星组网星间链路设计及关键技术分析

微纳卫星组网应用可大幅度提高航天装备的能力，较单颗大卫星具有明显的优势。首先，介绍了国内外微纳卫星组网的研究情况，以组网侦察应用为例分析了星间测量与通信链路的技术需求，并进行了系统架构和体制设计；其次，在星座设计基础上开展系统仿真，并提出了一体化设备实现方案；最后，分析了微纳卫星组网系统中几项重要的关键技术及其解决方案，对系统的设计和工程实现具有参考价值。     

Public good agreements under the weakest‐link technology

We analyze the formation of public good agreements under the weakest‐link technology. Whereas policy coordination is not necessary for symmetric players, it matters for asymmetric players; however, this fails in the absence of transfers. By contrast, with a transfer scheme, asymmetry may be an asset for cooperation. We characterize various types and degrees of asymmetry and relate them to the stability of self‐enforcing agreements. Asymmetric distributions of autarky public good provision levels (also representing asymmetric interests in cooperation) that are positively skewed tend to be conducive to the stability of agreements. We show that under such conditions, even a coalition including all players can be stable. However, asymmetries that foster stability (instability) tend to be associated with low (high) gains from cooperation.     

大跨度天基数据链的TDD时隙调度分析与优化

针对天基数据链系统卫星间的传播时延较大且节点间距离变化较大等特点，提出了一种提高时频资源利用率、提升系统容量、减小时延的方法。在时分多址与空分多址相结合的接入方式下，进行了时隙调度的分析与优化，利用卫星星座的空间复用与大跨度传播时延特性，采用时隙编排、收发状态调整、帧格式优化等手段，将信道利用率和系统容量提升了1倍，将卫星节点在某一方向获得服务的平均等待时间缩短为原来的1/4，提高了天基数据链系统的服务质量。     

一种基于DS-FFH/MSK调制的数据链抗干扰性能分析

提出了DS-FFH/MSK调制方式的一种实现方案,并在多种干扰环境下,从信源误比特率的角度对基于该实现方案的Link16战术数据链的抗干扰性能进行了系统分析,推导了几种不同干扰条件下数据链的误比特率表达式,并给出了计算机仿真结果.     

底部大空间配筋砌块砌体剪力墙结构的抗震分析

本文简单介绍了底部大空间配筋砌块砌体剪力墙结构抗震设计的一般要求,并结合工程实例,对比分析了底部大空间配筋砌块砌体剪力墙结构与底部大空间钢筋混凝土剪力墙结构在一维与多维地震作用下的结构反应,以便为以后设计提供必要的参考。     

钢筋混凝土板在内爆荷载作用下的反应分析

本文对内爆荷载作用下钢筋混凝土板进行数值模拟,并对不同炸药量和爆炸距离作用下产生的爆炸峰值压力及脉冲压力大小进行数值模拟计算,然后分析板破坏过程及破坏形式,给出安全等级评估,从而为板的防爆设计加固提供一些有益的参考。     

虚拟企业伙伴选择方法的研究

选择正确的合作伙伴是虚拟企业组建的关键步骤之一,也是虚拟企业成功运作的首要前提。针对某一具体案例,从目前虚拟企业伙伴选择的几种典型方法入手,运用系统研究方法,对各方法的具体思路作一总结,并提出了各方法的适用范围、优势与弊端,同时,找出了它们之间的差异所在。     

预制节段拼装预应力混凝土箱梁胶接缝抗剪性能研究

由于节段间接缝的影响，导致预制节段预应力混凝土箱梁接缝处抗剪机理与连续整跨梁存在较大差异，在计算抗剪承载力时无法直接应用整跨梁抗剪计算公式。首先对节段拼装箱梁接缝处的抗剪机理进行分析，得到影响计算抗剪承载力的关键参数；其次在已有计算公式的基础上，考虑混凝土立方体抗压强度和接缝处键齿数等参数的影响，提出适用于这种抗剪承载力的计算公式；最后将提出的计算公式与试验数据对比，表明该计算公式中的参数物理意义明确，计算精度较高，为预制节段拼装预应力混凝土箱梁结构的设计及应用提供了一定理论基础。     

高层剪力墙施工技术要点研究

随着高层建筑的增多,建筑施工质量引起人们的热切关注,本文结合高层施工中钢筋工程、模板工程的建筑要素,深入探讨高层剪力墙在施工过程中的技术要点,进一步提高高层建筑施工的水平。