基于IP网络的语音通信系统设计

介绍了网络语音通信的原理，重点分析了影响语音质量的因素，如混音合成、语音延时等。随后描述了一个局域网的语音通信系统的设计实现，并对测试结果进行了详细分析。     

浅论我国银行混业经营与监管

为适应经济全球化及金融一体化的趋势,面对加入WTO后的激烈市场竞争,2005年央行正式公布,工行、建行、交行成为首批直接投资设立基金管理公司的试点银行,银行混业经营付诸现实。本文对我国银行混业经营的风险与利益进行了分析,并对我国银行混业经营的环境进行了评价,最后提出了在新形势下对银行进行有效监管的建议。     

An Empirical Model of Advertising Dynamics

This paper develops a model of dynamic advertising competition, and applies it to the problem of optimal advertising scheduling through time. In many industries we observe advertising “pulsing”, whereby firms systematically switch advertising on and off at a high-frequency. Hence, we observe periods of zero and non-zero advertising, as opposed to a steady level of positive advertising. Previous research has rationalized pulsing through two features of the sale response function: an S-shaped response to advertising, and long-run effects of current advertising on demand. Despite considerable evidence for advertising carry-over, existing evidence for non-convexities in the shape of the sales-response to advertising has been limited and, often, mixed. We show how both features can be included in a discrete choice based demand system and estimated using a simple partial maximum likelihood estimator. The demand estimates are then taken to the supply side, where we simulate the outcome of a dynamic game using the Markov perfect equilibrium (MPE) concept. Our objective is not to test for the specific game generating observed advertising levels. Rather, we wish to verify whether the use of pulsing (on and off) can be justified as an equilibrium advertising practice. We solve for the equilibrium using numerical dynamic programming methods. The flexibility provided by the numerical solution method allows us to improve on the existing literature, which typically considers only two competitors, and places strong restrictions on the demand models for which the supply side policies can be obtained. We estimate the demand model using data from the Frozen Entree product category. We find evidence for a threshold effect, which is qualitatively similar to the aforementioned S-shaped advertising response. We also show that the threshold is robust to functional form assumptions for the marginal impact of advertising on demand. Our estimates, which are obtained without imposing any supply side restrictions, imply that firms should indeed pulse in equilibrium. Predicted advertising in the MPE is higher, on average, than observed advertising. On average, the optimal advertising policies yield a moderate profit improvement over the profits under observed advertising.JEL Classification: L11, L66, M30 M37 R12     

电子商务环境下基于B2C的物流配送路径优化

电子商务环境下的物流配送具有客户位置分散、订单多、批量小和重复线路多的特点,传统的线路优化方法都在不同程度上遇到各种问题。文中针对电子商务环境下的配送特殊性,采用改进两阶段算法混合进行求解。第一阶段用K-means聚类法将客户群分成若干区域,在每个区域又用扫描算法分解成若干符合约束条件的小规模子集;第二个阶段对各个分组内的客户点,就是一个个单独的TSP模型的线路优化问题,采用改进遗传算法进行优化求解。最后,结合具体实例,实验证明了该改进算法的有效性。     

中国重汽整车装配车间物料超市物料供给系统的优化

文中以生产实际应用为导向,以准时制为研究方向,以混流装配线物料供应设计为突破口,以中国重汽集团济南整车装配车间为研究对象,以完善其混流装配线物料供应体系为目的,进行深入分析混流生产供给特征,完善和优化中国重汽集团济南整车装配车间混流装配线物料供应体系,并对优化策略的应用效果进行理论检验。     

德国金融混业经营及其监管

德国金融制度最大的特点就是一直坚持混业经营制度,而其能够坚持混业经营制度的重要原因在于具备一套高效且适合金融业发展规律的监管制度。德国的金融监管系统,是一个法律和法规相当完备、自我监管和社会监管和政府监管相结合、法律裁决作为终审判决的有机整体;完备的监管体系使其能从容面对各种困难和危机。德国金融业的混业经营特点以及严格的监管体系使其稳步发展,即使在全球发生金融危机时也保持了相对的稳定。     

Virtually enhancing the real world with holograms: An exploration of expected gratifications of using augmented reality smart glasses

Integrating virtual objects into the physical world is about to become real. Augmented reality smart glasses (ARSG), such as Microsoft HoloLens and other head‐mounted displays, allow users to augment and enhance their subjective perceptions of reality. However, extant research lacks findings to explain why people intend to use ARSGs in particular situations. To address this highly relevant research gap, this study proposes and tests a theoretical model that examines people's expected gratifications from ARSG usage. In doing so, this research enhances the understanding of ARSGs and adds novel constructs (e.g., desired enhancement of reality) to the stream of technology and media adoptance.     

Role of electronic word-of-mouth content and valence in influencing online purchase behavior

Electronic word of mouth (eWOM) becomes an important tool for online consumers for evaluating and selecting a product. Extant research has mainly studied how various eWOM characteristics such as valence, volume, and text-based eWOM content affect purchase behavior. This study, for the first time, has explored the role of mixed neutral WOM valence and rich eWOM content on online purchase intention. Initially, the qualitative analysis method was used to conduct in-depth interviews with experts-cum-online shoppers from different fields. Purposive sampling was used to select 14 experts and online shoppers from diverse fields. Inductive analysis was conducted to analyze the interview generated content. It helped in forming various codes and categories in explaining eWOM constructs. Content analysis was also used to analyze the importance of various factors in key constructs (themes) affecting online behavior. The finding from the content analysis confirmed that both mixed neutral eWOM and rich eWOM content positively affects online purchase intention. This study has also explored how insights derived from the content analysis of valence and content can help marketers to develop an online marketing strategy. Research implications and future research directions have been discussed in this paper.     

Financial crises and venture capital development: evidence from Indonesia

This exploratory study examines how financial crises impede or support venture capital (VC) development in the context of Indonesia and the 1997–1998 Asian financial crisis (AFC). Using a mixed-methods research methodology, the study finds that financial crises have divergent effects on VC development. Financial crises support VC development through accelerated VC practise diffusion, but impede that development by slowing VC enabling conditions. The effects of the substantial macro institutional changes often associated with financial crises are insufficient to overcome these impediments, resulting in a smaller VC industry.     

山西冀中能源集团混合所有制经济建设的探索

经济发展需遵循市场经济规律。混合所有制是传统单一国有或单一民营向现代企业制度迈进过程中一个典型过渡和实现形式。介绍了山西冀中能源集团在发展混合所有制经济方面的探索和创新,分析了在推进混合所有制经济建设过程中取得的成效,并提出发展混合所有制经济,要完善产权流动的市场机制和产权保障的法律体系,发挥好政府在市场经济中的地位和作用等相关建议。