基于自适应分割算法的多跳频信号盲检测

传统的观点大都将跳频信号盲检测问题视为能量域的门限阈值问题,而从统计域来看,实际接收到的跳频信号是在一些未知时刻突变而在这些时刻之间保持统计平稳性的分段平稳随机信号,那么基于非平稳时间序列的各种突变检测算法就可以引入其中。分析了当前跳频突变通信信号的统计特性,给出了其高阶分段平稳的模型。将Bemaola-Galan（BG）提出的自适应分割算法推导到高阶,并将其成功应用于多个跳频突发信号盲检测和自适应提取中。仿真结果表明,该算法不需要任何先验信息,能够有效检测和提取多个突发通信信号,且性能优于传统的能量检测法。     

长三角区域创新资源空间集聚特征和共享机制研究

本研究首先分析了长三角区域27个城市的科技创新资源集聚情况。其次,以R&D经费/GDP、R&D人员数、发明专利授权数为变量,利用区位熵指数测算了长三角地区27个城市的科技创新集聚程度。在此基础上,对长三角区域科技创新资源的共享现状、共享问题进行了分析。研究发现,长三角区域科技创新资源主要集聚在上海、南京、杭州、合肥四个省会城市,以省会城市为中心带动了周边城市科技创新资源的集聚,呈现一定的空间相关性,但在由量向质以及区域协同集聚上仍需进一步努力。长三角科技创新资源共享初具规模效应,科技创新成本有所降低,但共享边界还有待进一步拓宽,完善创新资源共享激励与考核机制、以市场为主导,以法制为保障,加强共享理念宣传,多种渠道推进长三角区域创新资源共享。     

借鉴国外经验 加快商品物流配送现代化步伐——日本、韩国物流配送特点研究及其启示

通过对日本、韩国物流配送业的现代化技术设施和管理方法的深入了解和研究,认为我国必须学习借鉴国外先进经验,加快物流配送业的现代化步伐。提出了加快我国商品物流配送业现代化的见解。     

组合机床多轴箱设计CAI课件

介绍了以AutoCAD为平台所开发的组合机床多轴箱传动总体方案设计CAI课件的主要设计思想,并对设计过程中的一些关键技术作了简要说明。     

单片机在语音存储与回放中的应用

本系统以单片机 ８９Ｃ５１为核心,选用闪速存储器（Ｆｌａｓｈ Ｍｅｍｏｒｙ）ＡＴ２９Ｃ０４０作为语音的数字化信号的存储器件。阐述了一种实用可靠的设计方案。     

情寄沧桑意逍遥──论散文集《沧桑无语》的艺术追求

在《沧桑无语》中,作者承沿着对文化历史散文的一贯性追求,传达出对历史典籍极为通熟,古典文学功底甚为扎实的特色。在看似随意的描叙中,却引用自如,论理缜密,思想独到,情感饱满,是王充闾散文创作成熟的重要标志。     

试论我国现行矿业权制度

文章依据我国宪法、民法、矿产资源法及其配套的行政法规 ,归纳总结了我国现行的矿业权法律制度。并从矿业权人的资质认证 ,矿业权的审批登记、有偿取得和依法转让等四个方面剖析了现行矿业权制度的具体内容。     

Competing with complementors: An empirical look at Amazon.com

Research Summary : Platform owners sometimes enter complementors' product spaces and compete against them. Using data from Amazon.com to study Amazon's entry pattern into third‐party sellers' product spaces, we find that Amazon is more likely to target successful product spaces. We also find that Amazon is less likely to enter product spaces that require greater seller efforts to grow, suggesting that complementors' platform‐specific investments influence platform owners' entry decisions. While Amazon's entry discourages affected third‐party sellers from subsequently pursuing growth on the platform, it increases product demand and reduces shipping costs for consumers. We consider the implications of these findings for complementors in platform‐based markets. Managerial Summary : Platform owners can exert considerable influence over their complementors' welfare. Many complementors with successful products are pushed out of markets because platform owners enter their product spaces and compete directly with them. To mitigate such risks, complementors could build their businesses by aggregating nonblockbuster products or focusing on products requiring significant platform‐specific investments to grow. They should also develop capabilities in new product discovery so that they could continually bring innovative products to their platforms.     

Do ongoing networks block out new friends? Reconciling the embeddedness constraint dilemma on new alliance partner addition

Research Summary: This study addresses a theoretical dilemma regarding how alliance network constraint (reflected by network cohesion) affects a firm’s alliance formation with new partners. Using a network pluralism approach, we separate a firm’s ego alliance network into two activity‐based networks—an exploratory network and an exploitative network—based on the primary value chain activity involved in each alliance. We argue that the cohesion of exploratory or exploitative networks has an inverted U‐shaped effect on the addition of new partners in the same activity‐based network, and a positive effect on the addition of new partners in the other network. Results based on data from the biotechnology industry largely support our predictions with one exception. Our study contributes to both scholarly understanding of network embeddedness and alliance practice. Managerial Summary: The structure of firms’ ongoing alliance networks may have paradoxical implications for their efforts to search for and form alliance with new partners. That is, when a firm’s alliance partners are tightly connected with each other, the cohesive network tends to both encourage and impede the focal firm to add new partners. We resolve this dilemma by showing that when a firm is deeply entrenched in a cohesive alliance network conducting a certain type of activities (e.g., R&D activities), it may not easily add new R&D alliance partners. However, it may still be able to escape from the cohesive R&D alliance network by seeking new partners conducting other activities (e.g., manufacturing activities).     

实现我国可持续消费的对策研究

从可持续消费的基本理论及循环经济、政策引导、可持续消费评价指标体系和绿色供应链管理等角度,提出实现我国可持续消费的对策措施.