连续动态逆流提取罗汉果皂苷V的工艺参数研究

文章介绍了一种以水为提取溶媒的连续动态逆流提取罗汉果皂苷V的方法。以罗汉果皂苷V的提出率大于95%为指标,分别对料液比、提取温度、动态提取时间等因素进行正交试验考察,利用高效液相色谱法测定提取浓缩液的皂苷V含量,算出皂苷V提出率。结果得出料液比为1:8,提取温度为85℃,动态提取时间为90min,皂苷V提出率达到99.76%。连续动态逆流提取罗汉果中皂苷V的方法简单可行、生产效率高、成本低,易于企业推广应用。     

基于ICA的改进k均值聚类算法在股票市场中的应用初探

本文提出了一种基于独立成分分析的改进k均值时间序列聚类算法,在独立成分分析对每个时间序列提取特征并使用动态时间规整算法对每个时间序列两两进行距离的计算之后,使用模拟退火算法结合k均值聚类算法寻找全局最优解,本文使用伪F统计量确定最优的聚类数目,最后,本文使用实际股票收益时间序列验证了该算法的可行性,得到了较好的结果。     

基于滤波器的管道突变泄漏检测与定位

在利用卡尔曼滤波新息序列进行泄漏检测的同时,引入强跟踪滤波器性能评价指标,对信号进行变点定位。管道压力信号经卡尔曼滤波后产生新息序列,结合序贯似然比检测(SPRT)检测新息序列,实现管道泄漏检测。强跟踪滤波(STF)跟踪平稳信号时,新息序列满足相互正交,发生泄漏突变后,产生跟踪误差,新息序列相互正交性被破坏。建立新息序列正交性评价指标,作为泄漏的突变点指示,同时实现滤波器工作性能监测。     

一种检测物体轮廓缺陷的方法探索

本文提出将二维物体的轮廓图像坐标信息转换成基于质心距离的一维向量信息来进行检测。设计了基于双正交对称小波的去噪算法。实验结果表明,这种算法可以有效地去除噪声信号和缓变信号,保留缺陷的突变信息,是一种有效和实用的轮廓缺陷检测算法。     

基于定长窗分层检测的音频分割算法

音频分割是音频分析、检索等应用的基础.△BIC算法是一种重要的音频分割算法,传统的△BIC及其改进算法采用窗口增长方式遍历音频流顺次检测跳变点,计算量大且准确率低.本文提出基于定长窗分层检测的音频分割算法,采用定长窗滑动遍历音频流,窗内自顶向下分层次地计算△BIC检测跳变点,最后用局部极值判定方法验证检测到的候选跳变点.实验结果表明,本文算法分割性能良好.     

IEEE 1588V2精密时间协议在城域网时间同步中应用方案的探讨

本文针对现有TD基站时间同步方案存在的弊端对基于IEEE 1588V2精密时间协议的时间同步方案进行了探讨,阐述了如何将IEEE 1588V2精密时间协议应用在现有PTN网络中,描述了该时间同步系统的具体组成并提出了在实际工程应用中应注意的事项。     

基于自适应非最大抑制的Harris角点检测算法

本文提出一种基于自适应非最大抑制策略的Harris角点检测算法;算法从角点响应函数的局部极大值入手,计算图像中每个像素点的局部极大值通过设置抑制半径与角点响应函数的局部最大值关联最终获取角点。实验表明,该算法检测出的角点均匀分布,提高了检测角点的准确性,算法能够应用于图像特征匹配、运动估计等方面。     

基于用户分类的余额宝资金流预测研究

以余额宝为代表的互联网金融作为一种创新的金融服务模式对资金流的预测提出了新的要求。本文以余额宝资金流数据入手,把用户分类融入时间序列算法,提出了基于用户分类的资金流预测模型。通过实证分析,该模型与传统的时间序列模型相比提高了预测的准确性。     

改进BP神经网络的研究及应用

人工神经网络具有强大的非线性映射能力,已经被应用于模式识别、智能控制、图像处理以及时间序列分析等各种领域。本文针对BP算法的不足,提出了BP算法的启发式改进,通过对遗传神经网络模型及其算法进行分析和研究,针对遗传算法的主要缺陷介绍了一种常用的改进类型。     

一种基于MFCC和IPA转换的关键音检索系统研究

海量视音频信息检索一直是人们研究与应用的热点。文章介绍的一种关键音检索系统,使用MFCC算法提取语音特征,调用Viterbi解码算法和国际音标模式库,解码得出该音频文件对应的国际音标序列。并利用距离编辑算法计算得出关键词在音频文件各个时间点处的置信度,获取检索模块输出的检索结果。本系统具有与待检测语言无关的特点,对普通话和英语的检索准确率不低于90%,且支持敏感度调节和多词汇并行检测的优点。     

Development in Information and Communications Technology (ICT) Statistics at the Australian Bureau of Statistics

This paper outlines the ICT statistical developments that the ABS has undertaken over recent years. These developments have been on both the supply side (ICT industry) and the demand side (use of IT by sector). The content of ABS ICT surveys has changed significantly over the last few years and are expected to develop further in line with industry changes and emerging policy needs.
Recent developments in household collections have been the inclusion of IT use questions in the 2001 Census of Population and Housing and in various ABS social surveys such as Children's Participation in Culture and Leisure Activities. Annual business IT use surveys are now conducted and include topics such as Internet commerce and IT security. Biennial ICT industry surveys are conducted to provide data on ICT production, imports and exports, ICT industry employment, performance and structure information. An Internet activity survey is run every six months and provides regional Internet access details and infrastructure details on Internet service providers.
A major development for 2002–03 will be the compilation of an ICT satellite account. ABS intends to produce an ICT Information Development Plan to guide its future statistical development work in the ICT field.     

Incumplimiento del salario mínimo en Europa central y oriental

En este estudio se analiza el incumplimiento del salario mínimo durante el periodo 2003–2012 en diez países de Europa central y oriental con salario mínimo obligatorio nacional. A partir de los datos de EU‐SILC y la metodología propuesta por Bhorat, Kanbur y Mayet (2013), se cuantifica la incidencia y magnitud del incumplimiento. Se realizan análisis de regresión sobre determinantes individuales, laborales y macroeconómicos. Aunque la incidencia permanece relativamente baja, los trabajadores a los que se dirigen las políticas de salario mínimo parecen los más expuestos a su incumplimiento. Con el tiempo, una mayor incidencia se asocia a una razón más alta entre salario mínimo y salario medio.     

Value at Risk in the Suburbs: Eminent Domain and the Geographical Politics of the US Foreclosure Crisis

Several US counties and local governments have recently considered a novel solution to the foreclosure crisis. They plan to use eminent domain to compel the owners of mortgage debt—and specifically of private‐label mortgage‐backed securities—to sell the debt to the government at a price reflecting the loan's market value. The government would then restructure the debt and resell it to new investors. The plans are striking because—in contrast to both development‐driven eminent domain and the federal subprime bank bailout—they would force investors to assume asset devaluation and increased long‐term risk. Notably, the plans have emerged as an instance of financialization‐focused politics in suburbs and suburban cities of color, specifically majority‐black and ‐Latino/a suburbs. Local support for the plans, we argue, is rooted in the long‐term disinvestment of these ‘suburbs of exception', which became targets of subprime lending and eventually sites where the ‘financial exception' has been localized. But these demographic shifts, fragmentation and fiscal pressures have at the same time created a suburban political terrain in which the plans have gained their strongest political support.     

Towards a Theory of Serendipity: A Systematic Review and Conceptualization

Serendipity – the notion of making surprising and valuable discoveries – plays a major role in the success of individuals and organizations alike. Previous research has established the importance of serendipity and identified important individual- and organizational-level antecedents. However, the literature has been dispersed and the boundaries of the concept have been blurry, leading to a lack of conceptual clarity and structure, and thus limiting validity and managerial actionability. Based on a systematic literature review, I synthesize existing management-related research on serendipity and explicate the emergence and composition of serendipity in the organizational context. I first identify three necessary conditions that differentiate serendipity from related concepts such as luck or targeted innovation: agency, surprise, and value. Then, I draw from the literature on sensemaking, event-based theorizing, and quantum-based approaches to management to conceptualize the process of cultivating serendipity in the organizational context as a process of enabling potentiality and materialization, and develop a multi-level theory of (cultivating) serendipity. This conceptualization contributes to our collective understanding of how, why, and when (i.e., under what conditions) organizations can leverage the value in the unexpected, which opens up fruitful avenues for further research.     

Accountability of NGOs in Bangladesh A critical overview

NGOs in Bangladesh have been recognized as effective change agents in the socio-economic arena throughout the world. Their contributions in micro credit, non-formal education and primary health care are widely known. NGOs play a significant role in society. NGO accountability, as a result, has become a critical issue. NGO accountability in Bangladesh has been examined here in relation to patrons, clients and themselves. Of the three relationships only accountability to patrons is in a near satisfactory state. Accountability to clients is handicapped by lack of opportunities of beneficiaries to participate meaningfully in NGO policy making. Accountability to themselves is adversely affected due to the adherence to a strictly hierarchical system and the influence of founding and charismatic NGO leaders.     

Cultural Economy Planning in Creative Cities: Discourse and Practice

While a growing body of research analyses the functional mechanisms of the cultural or creative economy, there has been little attention devoted to understanding how local governments translate this work into policy. Moreover, research in this vein focuses predominately on Richard Florida's creative class thesis rather than considering the wider body of work that may influence policy. This article seeks to develop a deeper understanding of how municipalities conceptualize and plan for the cultural economy through the lens of two cities held up as model ‘creative cities’ — Austin, Texas and Toronto, Ontario. The work pays particular attention to how the cities adopt and adapt leading theories, strategies and discourses of the cultural economy. While policy documents indicate that the cities embrace the creative city model, in practice agencies tend to adapt conventional economic development strategies for cultural economy activity and appropriate the language of the creative city for multiple purposes.     

Input/output ranges and performance: an examination of US machine tool producers

Despite the establishment of high-tech multinational enterprises (MNEs) in Ireland since the late 1950s, the country did not succeed in closing the technological gap with most of its EU counterparts. The weak National System of Innovation (NSI), and in particular low business and government R&D levels, combined with a lack of research and technology linkages between MNEs and indigenous firms, explain these poor results. However, the Shannon region in the West of the country presents some specific institutional characteristics that could theoretically make the region a strong technological enclave. The various actors in the region - i.e. the administrative, financial, political and research institutions, as well as the business organizations - have indeed infused a new type of economic development. After a brief review of the available concepts and models articulated around these actors and their interrelationships, the paper analyses whether the Shannon region, taken as an illustrative example, mirrors a specific economic and technological localized setting. The study is based on a survey of indigenous and foreign firms.     

Sixty years of discrimination and diversity research in human resource management: A review with suggestions for future research directions

This article reviews discrimination and diversity research published in Human Resource Management (HRM) over the past 60 years. While discrimination and diversity are very different constructs, it is often informative to study them together, because when people recognize each other's diversity, this can result in bias, stereotyping, and discrimination. We conducted bibliographic searches for terms related to discrimination and diversity as well as a manual search through every title and abstract published in HRM over the last 60 years to assess article relevance. The search resulted in 135 research articles with 136 unique studies (i.e., samples) which are reviewed in this article. Sex and race are the demographics that have been examined the most in HRM, while religion has been examined the least. Moreover, the number of studies examining lesbian, gay, bisexual, transgender, and queer (LGBTQ) employees in the workplace in HRM has grown quickly within the past 10 years, culminating in a recent meta‐analysis. Our review looks at some of the earliest research published, the most recent research published, and the overall trends we identified in the research over the years for both discrimination and diversity articles. We then make future research suggestions and recommendations to advance the study of discrimination and diversity in the coming years.     

Towards an Asian model of human resource management? A comparative analysis of China,Japan and South Korea

There has been much discussion regarding the possible decline and weakening of national systems of human resource management (HRM). Yet, culture and institutions are often cited as the major stumbling blocks to this outcome. Such constraints may dissipate in the analysis, particularly if ‘regional clusters’ are considered where geographic and cultural closeness and ‘openness’ to similar economic pressures exist. In such cases, it might be postulated that convergence in HRM will occur. We argue that China, Japan and South Korea represent such a cluster. This article examines these countries, to see if a degree of convergence is taking place and if it is towards an identifiable ‘Asian’ model of HRM. A model of change is presented that distinguishes between levels of occurrence and acceptance. Details of the development and practice of HRM in each country are then set out. The article ends with a discussion and implications section and a brief conclusion.     

Ansätze und Ergebnisse anglo-amerikanischer M&A-Forschung

Based on a review of established U.S. management journals (1995–2003), six schools of thought are identified within the Anglo-American M&;A research: “Capital Market”, “Principal/Agent”, “Industrial Organization”, “Organizational Behavior”, “Human Resources” and “Strategic Management”. The literature review shows that the definition of M&;A success, the methods applied, and insights from empirical research differ according to the respective school of thought. Empirical studies focus on the resource combinations of merger partners, the specific circumstances of merger negotiations, and on integration management as antecedents of merger performance. Unfortunately, empirical findings have not yet provided reliable explanations for M&;A success. Based on the current state of Anglo-American M&;A research, the authors discuss implications for business practice, identify research gaps, and propose areas for future research.