用振动测量和神经网络进行齿轮传动的故障诊断

目前已经使用振动测量和神经网络方法开发出了齿轮传动的故障诊断技术。实施振动测量采用背对背结构的齿轮试验装置，在施加负荷和按齿轮节圆线速度条件下运转，这些都是工业齿轮应用的标准型式。齿轮的普通故障模式体现在试验齿轮上。本所研究的运行齿轮有：正常齿轮、齿尖断裂的齿轮、磨损的齿轮、径向跳动超差的齿轮、综合导程误差超差的齿轮和润滑有限制的齿轮。描述齿轮传动运行状态的特征参数有振动、电机功率、油温和转速。振动测量使用加速度计和声发射传感器。自组织映射(Self Organizing Map，SOM)是一种名的神经网络方法，它是使用上述这些特征参数进行训练和试验。所有经过训练的网络都是有效的，其成功率可达到95％以上。神经网络能够识别运行状态，甚至可以达到100％的成功率。     

Understanding co‐consumption between consumers and their pets

Pets live with people; they participate in people's everyday life activities and are often seen as human‐like family members. Consumers in the industrialized countries are investing more money in their pets and spending more time with them than ever before. The pet and the owner can even be considered to form a unit that consumes together. In this article, we develop a conceptual understanding of co‐consumption by examining how pets act as co‐consumers in everyday consumption. The pet owner and pet have joint consumption experiences in which they interact with other actors such as service providers. The consumer (pet owner) consumes because of the pet, meaning that he or she constantly needs to take the pet into account in choices and activities beyond pet‐related consumption, such as what kind of car to buy, where to work, whom to marry and how to live. The co‐consumer (pet) also acts as an active agent who experiences, feels, suffers and likes the goods and services that the consumer buys for the pet. Reciprocally, the pet provides the consumer (pet owner) with companionship, support and a boost to wellbeing. As such, our research suggests that co‐consumption provides an understanding not only of consumption with pets but also of other contexts, especially those in which the aim is shared well‐being such as consumption together with children, the disabled or the elderly.     

Is more capability always beneficial for firm performance? Market orientation,core business process capabilities and business environment

This study examines the role of capabilities in core marketing-related business processes–product development management (PDM), supply chain management (SCM) and customer relationship management (CRM)–in translating a firm’s market orientation (MO) into firm performance. The study is the first to examine the interplay of all three business process capabilities simultaneously, while investigating how environmental conditions moderate their performance effects. A moderated mediation analysis of 468 product-focused firms finds that PDM and CRM process capabilities play important mediating roles, whereas SCM process capability does not mediate the relationship between MO and performance. However, the relative importance of the capabilities as mediators varies along the degree of environmental turbulence, and under certain conditions, an increase in the level of business process capability may even turn detrimental.     

The interrelationship of stock ownership and customer relationship volume: Case of a Nordic retail bank

Researchers have been increasingly interested in the fact that individuals who own stocks of publicly listed companies may also act as the same companies’ customers, buying their products and services. This article studies the relationship between an individual's stock ownership and his/her customer relationship (purchase/sales) volume. Examining a large sample of customers of a Nordic retail bank, the authors find that the proportion of high-volume customers is significantly greater among stock-owning customers than among non-stock-owning customers. Generally, it is found that there is a positive relationship between a customer's relationship volume and his/her stock ownership.     

Measuring Labour Market Flexibility in the OECD Countries

This paper investigates the adjustment of employment to population shocks in 22 OECD countries over the period 1960–1997. Most of the countries have experienced significant population shocks during that period – due to migration and other reasons. We estimate the speed of adjustment parameter which is used as a measure of the functioning of the labour market. If the OECD countries are compared using this measure, it turns out that the Anglo Saxon countries clearly outperform the other (European) countries in terms of labour market adjustment. In the case of the Nordic countries, the results presented are the most extreme. In practically all OECD countries, the functioning of the labour market seems to have deteriorated over time. These observations seem to be helpful in explaining the behaviour of unemployment rates in the OECD area.     

Examining consumer food waste through grocery retailers' customer data: Segments and practical implications

Grocery retailers have a large amount of societally relevant data on food purchases in their databases, which they have traditionally used merely for marketing purposes. However, despite the potential, the data have so far been rarely used in sustainability-related research. This study addresses a key sustainability challenge—the reduction of food waste—by using retailers' customer data and a questionnaire. This paper's purpose is to identify and analyse household food waste segments and discuss their actual purchasing behaviour patterns. By doing so, we also illustrate and exemplify the potential use of customer loyalty card data to address global challenges related to food at the consumer level. The study utilizes an extensive data set of food purchases together with a survey of self-reported reasons for food waste in households. Utilizing cluster analysis, Phase 1 identifies six household segments: no food waste; trust in date labels; safety first; occasional wasters; overpurchasers and overpreparers; and family first. These segments differ in their sociodemographic and purchase profiles. In Phase 2, these segments' purchasing behaviour is examined further by applying tree-based methods. This study contributes to food waste research and studies on sustainable retailing. It also has practical implications for how retailers can facilitate household food waste reduction.     

Fundraising as a theatrical event

This paper introduces and elaborates the notion of fundraising as a theatrical event. By exploring the theatrical setup, as well as social context, of two elite fundraising events that took place at almost the same time and place and for the same cause, the authors disentangle different components that are at play in a fundraising event. The paper shows that a fundraising event needs to align sensory, artistic, and symbolic theatrical levels to convey the desirability of the fundraising cause. In addition, not only the economic but also the social and cultural capitals of the hosts of the event may be of relevance to the fundraising.     

Design and cost optimization for hierarchical data

In this paper, we consider balanced hierarchical data designs for both one‐sample and two‐sample (two‐treatment) location problems. The variances of the relevant estimates and the powers of the tests strongly depend on the data structure through the variance components at each hierarchical level. Also, the costs of a design may depend on the number of units at different hierarchy levels, and these costs may be different for the two treatments. Finally, the number of units at different levels may be restricted by several constraints. Knowledge of the variance components, the costs at each level, and the constraints allow us to find the optimal design. Solving such problems often requires advanced optimization tools and techniques, which we briefly explain in the paper. We develop new analytical tools for sample size calculations and cost optimization and apply our method to a data set on Baltic herring.     

Employment,unemployment and output growth in booms and recessions: time series evidence from Finland, 1970-1996

The Finnish economy experienced dramatic changes in the early 1990s. The collapse of the economy in 1991 resulted in a 12% decline in GDP over the years 1991–1993, leading to a significant fall in the demand for labour and a rise in unemployment. The study contributes to the discussion on possible changes in the functioning of the Finnish economy by scrutinizing the stability of the employment/unemploymentoutput relation. The empirical analysis, based on aggregate variables from the period 1975–1996, suggests that the relationship between aggregate-level employment/ unemployment and output growth remained relatively stable throughout the investigation period.     

The marketing strategy of a project-based firm: The Four Portfolios Framework

The purpose of this paper is to address the simultaneous management of multiple business relationships and multiple projects in the marketing strategy of the project-based firm. The research question is: How can the essence and interdependencies between the portfolios of relationships and projects be conceptualized as the marketing strategy of a project-based firm? We address this question by constructing a framework including two portfolios of relationships and two portfolios of projects, and by discussing how these portfolios may be interrelated. Combining the approaches of relationship management in project marketing on the one hand and the management of project portfolios on the other contributes a novel viewpoint to project marketing.