初游者与重游者的旅游特征差异分析——以广西大新县为例

针对初游者和重游者的旅游特征进行差异分析,这对于旅游目的地建设具有重意义。以在广西大新县进行问卷调查获得的数据为基础,对初游者和重游者的旅游特征差异进行细致分析,得出如下结论：初游者和重游者在信息渠道、交通方式、旅游消费体现出了“大趋同,小分异”特征;在旅游方式和停留时间呈现出较大的分异性;重游者的旅游满意度和忠诚度比初游者更高。     

基于三维分类法的旅游信息分类体系与编码初探

随着国民收入的增长、消费理念的转变以及闲暇时间的增多,旅游业飞速发展,逐渐成为国家战略性支柱产业,为其提供理论、技术、信息支撑的旅游信息科学呼之欲出。进行旅游信息分类体系与编码研究是旅游信息科学理论的重要研究内容,同时为旅游管理、规划决策、旅游信息平台搭建提供技术与信息支持。文章基于旅游三体、旅游六要素、需求层次、协同、可持续发展和信息组织六大理论,结合目前旅游业与相关产业融合发展态势,全面系统地提取了各类旅游信息;采用时间、空间、属性三维分类方法,建立了旅游信息三维立体分类模型,构建了旅游信息五级分类体系基本框架;应用“空间维＋时间维＋属性维”信息编码结构,确定了旅游信息编码的3段37位代码;通过陕西省旅游信息管理数据库系统的实践验证,旅游信息分类体系和编码系统性强,完整性高,操作便捷,可为旅游信息科学的理论研究及实践应用提供借鉴。     

Generational Perception and Satisfaction Differences Related to Restaurant Service Environment

ABSTRACT

The current study considers perception, satisfaction, and importance rating differences of aspects of the dining service environment in a casual-themed restaurant between members of three generations—baby boomers, Gen X, and millennials. The study also assesses the moderating role of generation on the relationship between satisfaction and repeat patronage intentions. Significant differences were found between generations related to satisfaction, importance ratings, and repeat patronage intentions regarding the overall dining service environment. The current study provides assessment of components of the DINESCAPE scale along with items from the DinEX scale related to social connectedness. Implications of the research are discussed.     

一种码率自适应信源信道联合编码系统

双LDPC码系统是新近出现的一种信源信道联合编码系统,该系统的性能虽然好但不稳定,在信源熵增加时会产生很高的误码平台。为了解决这一问题,提出了一种码率自适应双LDPC码系统,此系统采用码率自适应LDPC码作为信源码,当信源熵变化时可以灵活地调整信源码率,从而保证系统在高低不同的信源熵情况下都具有优秀、稳定的性能。仿真结果显示,在高低不同的信源熵情况下,所提出的码率自适应双LDPC码系统性能均好于传统双LDPC码系统,而且在误比特率为10-6时都没有出现误码平台。     

一种3G网络移动流媒体监控系统的图像处理及传输设计

为推动移动流媒体监控领域新技术的开发和应用,针对工程实际问题,提出了一种3 G网络移动流媒体监控系统的图像处理及传输设计方案。系统以WCDMA的3G无线通信网络为传 输平 台,采用具有强大控制能力的嵌入式和DSP流媒体双处理器为主控芯片和较强通信功能的3G 模块EM770W,可以对MPEG-4流媒体流进行高效编码、压缩和实时传输控制,压缩率、分辨率 及多种功能可根据需要定制。系统可根据多变的3G链路网络特性和客户端反馈参数自适应调 节媒体速率和媒体流,从而合理利用网络带宽资源,实现鲁棒控制。仿真实验表明,在3G网 络环境下,与传统的ARM或DSP流媒体监控系统相比,本系统在缩短编码压缩时间、节省资源 、减少网络拥塞、提高数据处理速度、改善媒体质量和降低功耗等方面具有明显的优越性, 在不同的图像分辨率下,本系统编码压缩平均用时可以节省15%～50%。     

Customers on the web are not all created equal: the moderating role of internet shopping experience

Consumers' previous shopping experience has been found to be an important influence on future shopping intentions. Prior internet shopping experience, however, has been largely overlooked as a moderator of attitudes and online-retail outcomes. Specifically, key influences on online retail buying behavior such as site reputation, advertising likeability, site security and hedonic and utilitarian shopping values can be expected to have differential effects on intentions to repatronize an e-commerce website based on the level of internet shopping experience by prospective buyers. This study proposes and tests an integrated model in which level of prior internet shopping experience is treated as a moderator of relationships among attitudinal variables and repatronage intentions with the variable attitude toward the site as a mediator of buying intentions. Findings are consistent with the proposed model with an interesting exception. Perceptions of site security were in the opposite direction of the model prediction. Managerial and theoretical implications are provided for consideration.     

浅谈视频变码流的转换编码

近年来,视频的编码技术和转码技术得到了快速的发展。文章介绍了码流的转换编码、图像编码、MPEG-4转换编码等最新技术,并对编码转换质量的控制提出了建议。     

An improved Huffman coding with encryption for Radio Data System (RDS) for smart transportation

As the development of Radio Data System (RDS) technology and its applications are getting more and more attention and promotion, people concern their personal privacy and communication efficiency, and therefore compression and encryption technologies are being more important for transferring RDS data. Unlike most of the current approaches which contain two stages, compression and encryption, we proposed a new algorithm called Swapped Huffman Table (SHT) based on Huffman algorithm to realise compression and encryption in a single process. In this paper, a good performance for both compression and encryption is obtained and a possible application of RDS with the proposed algorithm in smart transportation is illustrated.     

基于稀疏编码的TPM通信噪声抑制分析

基于独立成分分析（ICA）时域滤波的时相调制（TPM）通信系统中的噪声干扰对系统性能有很大的影响。采用稀疏编码方法对TPM通信中的噪声进行抑制。首先对观测信号采用稀疏编码方法进行稀疏编码,然后对处理后的信号使用压缩方法处理,从而将ICA过程中对噪声所代表的小的变元值变小或置零,最终达到对噪声的削弱。仿真表明,稀疏编码方法对TPM通信中的噪声确实有较好的抑制,与不采用所提方法相比,大约有1 dB的系统误码性能提高。     

MIMO系统的波束成形技术与开关算法结合的性能分析

提出了一种在多用户情况下多输入多输出系统用开关算法结合波束成形技术的方法 。对3种波束成形技术的方案研究表明,波束成形的处理过程对开关算法的判决准则有重要 影响。从仿真结果可以看到,空时分组码的自适应波束成形算法与开关算法结合时在误码率 为10 -2时,信噪比比迫零算法结合和奇异值分解算法结合时分别提高7 dB和8 dB 左 右。