矮牵牛快繁技术研究

以重瓣矮牵牛的不同外植体为试验材料，诱导不定芽，产生再生植株；分别用叶片、茎段、茎尖和花蕾作为外植体进行培养，结果表明茎尖最易诱导产生幼苗，出苗率为90％；继代培养基以MS BA2 NAA0．1最有利于不定芽的产生，用于重瓣矮牵牛的快繁生产。     

食品快速检测技术与方法研究进展

本文简要介绍和总结了国内食品快速检测技术与方法,主要包括食品质量指标、食品添加剂、食品中的微生物、农药残留、兽药残留、转基因食品的测定。     

The antecedents of in-store hoarding: measurement and application in the fast fashion retail environment

This study raised scholarly inquiry about the construct of in-store hoarding and investigated the antecedents of in-store hoarding in the fast fashion retail environment. As the market becomes dynamic and volatile, more retailers are moving toward fast fashion by constantly delivering new products throughout the season. As a result, a product life span is dramatically reduced, thereby accelerating perishability of fashion items. Moreover, in order to make constant room for new products and minimize markdowns, fast fashion retailers deliberately limit product availability, creating a sense of scarcity on the part of consumers. Based on the literature review and one-to-one interviews, perceived perishability, scarcity and low price were identified as primary drivers of in-store hoarding. Overall, results from a field study supported the proposed model. However, the findings indicated that perceived perishability and scarcity were central to understanding in-store hoarding, whereas low-price perception was least important with a marginally significant effect on in-store hoarding. This study made a significant contribution to the consumer and retailing literature by introducing, defining, and operationalizing new constructs and new measurements, including scales for perceived perishability, perceived scarcity, and in-store hoarding. This study also provided many implications for practitioners in developing and implementing marketing and merchandising management strategies.     

How product representation shapes virtual experiences and re-patronage intentions: the role of mental imagery processing and experiential value

Despite the lack of physical contact, innovative technologies in online stores are able to engender compelling virtual product experiences. The primary objective of this study is to clarify the mechanisms through which these virtual product experiences occur. The study proposes and tests a model in which mental imagery processing and consumers' perceptions of experiential value function as potential mechanisms through which virtual experiences in online stores are established, thereby determining re-patronage intention. The model was tested in an experimental study investigating two versions of a fast fashion online store that varied in terms of product representations: dynamic (i.e., a mix-and-match feature allowing the creation of visual images of apparel combinations) and static (i.e., rigid pictures). A sample of 660 valid cases involving individuals of Generation Y (born in 1977–1994) was obtained. The structural equation modeling technique was used to analyze the proposed research model. The results indicate that the dynamic mix-and-match technology arouses more mental images of physical product interaction than do static pictures. Moreover, mental imagery processing can be considered an important underlying source of online experiential value, which consumers subsequently exploit with repeated visits to the online store. By introducing psychological constructs such as mental imagery and perceived value, this study augments prior research on online product experiences by proposing and validating the underlying mechanisms through which the way of representing products affect consumer responses. Finally, both theoretical and practical contributions of the findings are discussed, as well as directions for further research.     

一种适合突发数字通信的快速载波频偏估计算法

给出了一种适用于MPSK解调的非数据辅助(NDA)载波频偏估计算法,该算法采用前向开环载波同步方式,与传统的Costas环相比,这种方式具有同步速度快、载波频偏估计范围大的优点,尤其适用于高速突发数字通信系统。理论和实验结果表明,该算法计算量小,复杂度低,抗噪声性能好,适合于工程实现。     

一种基于快速搜索的视频时域差错隐藏算法

为了克服视频传输中因传输差错引起的视频质量下降,提出一种基于快速搜索的边框匹配时域隐藏算法(CSBM)。该算法针对时域差错隐藏的运动矢量恢复问题,利用边框匹配算法改善被恢复的物体边缘模糊的情况;采用基于中心偏置的快速搜索样式得到最小边界匹配差值的候选运动矢量,减少了解码器差错恢复的计算复杂度。实验结果显示,针对不同性质的序列,该算法与边界匹配算法(SMA)、棱形搜索的边界匹配法(DSSM)等典型差错隐藏方法相比,平均搜索点数可减少12.5~19个点,亮度分量的峰值信噪比(PSNR)能改善0.93~1.55 dB,证明该算法能获得更好的差错隐藏效果,并减少了运算量。     

矩阵乘法的一个新快速算法

本文提出了计算矩阵乘法的一个新的快速算法。     

论标准量化管理模式及其应用--从中式快餐业存在的问题谈起

从我国中式快餐连锁企业存在的问题出发，指出这类企业在标准体系建设方面的不足，针对这一问题提出了标准量化管理的设想，并对标准量化管理的概念、管理模式以及运作程序作了论述。     

一种基于代价函数的正交频分复用中符号同步与频偏估计算法

本文利用正交频分复用（OFDM）帧结构的特点，引入代价函数，推导出了一种符号同步算法和频偏估计算法，并从理论上分析了在存在频偏的情况下，符号同步可以独立于频偏估计。计算机仿真表明，该算法具有较好的同步和频偏估计性能。     

宽带抗干扰通信系统的跳频同步研究及应用

本文分析了宽带抗干扰跳频通信系统的抗干扰性能，介绍了跳频同步的多种实现方法，提出了一种较好的组合同步方法，并对这种方法的实现原理作了较详细的论述。