皮带运输机皮带跑偏成因及解决办法

为保障皮带运输机的安全运作,避免跑偏状况出现,本文针对皮带运输机的结构和工作原理进行分析,详细研究了可能引起皮带跑偏的一些原因,并针对原因提出了相应解决办法.     

Dynamic managerial capabilities: Scale development and validation

Studies on dynamic managerial capabilities still have a rather theoretical nature, and there is great difficulty in finding a valid, reliable instrument to measure this construct. The present study contributes to solving this problem: It aims to develop and validate a scale to measure dynamic managerial capabilities. In this investigation, we develop a scale for three factors related to dynamic managerial capabilities: human capital, managerial cognition (already described in the literature), and relationship networks. The prominent finding in this research is the factor that is referred to here as relationship networks.     

分税制、地区竞争与地方政府债务扩张

近年来,中国地方政府债务持续扩张引起政府、社会和学界的高度关注.通过构建一个包含地区增长目标、分税制和地方政府博弈的动态随机一般均衡模型,从税制视角对地方债扩张这一现象加以解释.研究表明,在地方政府追求经济增长的背景下,当前的税收制度扩大了地方政府发生短视或者经济出现不利冲击时政府债务扩张的程度.渠道分析发现,地方政府发生短视时,顺周期的增值税放松了地方财政约束并降低了地方政府债务扩张程度,转移支付降低了地方借贷成本并提高了债务扩张程度;负向生产率冲击发生时,顺周期的税收收入加剧了财政压力并放大了地方政府债务的扩张.此外,地区竞争放大了税制产生作用的强度.由此,可以通过增加财产税等直接税的比重、规范转移支付的获取和促进地区协作等方式限制地方政府债务扩张.     

LT码新型度分布及其在电力线通信中的应用

Luby变换(Luby Transform,LT)码作为信道编码应用于电力线通信(Power Line Communication,PLC)，可实现电信号的可靠传输。度分布对LT码编译码性能的影响至关重要。为了得到更优的度分布，首先调整二进制指数分布(Binary Exponential Distribution,BED)中的度数比例，获得一种译码性能更优的改进的二进制指数分布(Improved BED,IBED)。然后，根据IBED在冗余度较小时译码成功率高，而冗余度增大后鲁棒孤子分布(Robust Soliton Distribution,RSD)的译码性能表现更佳的特点，通过求和归一化的方式将IBED与RSD两种度分布的优势进行有机结合，提出一种新型二进制鲁棒孤子分布(Binary RSD,BRSD)。仿真结果表明，与其他方法及传统的RSD相比，采用新度分布进行LT编码，可明显降低译码开销，并节约编译码耗时。将新型度分布应用于基于LT码的PLC系统中，能有效地抑制PLC信道中各种噪声对电信号的干扰，并提高通信效率。     

Information and Knowledge as Antecedents of Consumer Attitudes and Intentions to Buy and Recommend Fair-Trade Products

The authors propose and empirically test a causal model to understand how the availability of fair-trade information and consumer knowledge about this issue affect consumers’ attitudes and intentions toward fair-trade products. The model is built upon the attitude-behavior paradigm and the premises of agency theory. It is tested through structural equation modeling with a sample of 292 Spanish consumers. The findings are that consumers do not have good knowledge about fair trade and that this is significantly determined by the lack of information about this in the market. It is also observed that consumers’ perceptions about the availability of fair-trade information have negative effects on their concern about this issue and that such information as is available is not effective in reducing consumer skepticism. The research represents an extension of previous fair-trade literature because the role of information and communication in improving consumer attitudes and buying intentions has rarely been explored in the case of ethical products.     

Evolution of indigenous tourism among the Lacandon of Chiapas: an application of Weaver’s model

ABSTRACT

In this paper, Weaver’s six-stage indigenous tourism model is applied to the Lacandon Maya (Hach Winik) of Chiapas, Mexico. Based on a comprehensive review of the anthropological and historical literature on this indigenous group, combined with longitudinal ethnographic and collaborative research performed with tourism entrepreneurs, the Lacandon tourism experience is assessed from the pre-European period until present. By analysing a case study of indigenous tourism in Mexico, a developing country in another geographical region and with a different colonial past, this work supplements Weavers’ perspective. The results show that the fourth and fifth stages of Weaver’s model coincide in this case study, while the sixth stage is still incomplete. Although the Lacandon case has its peculiarities and bearing in mind that several different factors should be considered in the Latin American context, the model proves to be an interesting tool for indigenous tourism analysis in developing countries.     

钢铁工业与现代服务业融合发展的案例分析

简要叙述了钢铁工业与现代服务业开展“两业融合”的重要意义,分别以宝钢、河钢为代表的国内钢铁企业和以浦项、蒂森克虏伯为代表的国外钢铁企业为例,对钢铁企业开展两业融合的做法进行了分析,最后针对两业融合发展提出了几点建议。     

工商管理学科实验教学体系研究

在追溯工商管理学科实验方法发展历史进程的基础上,分析了工商管理学科4种实验教学模式的特点,系统研究了我国高校工商管理学科实验教学的具体构架。     

经济管理类专业计算机相关课程的设置与开放实验教学的研究

文章根据新形势下经济管理类专业对计算机及相关技术的特殊要求,讨论了计算机相关课程的设置,提出了实验教学改革的想法,即如何构建和管理开放实验室。     

决定企业成败因素的新认识

通过剖析细节主义、战略主义的理论欠缺,文章提出了决定企业成败因素的四大特点：综合性、差异性、阶段性和复杂性.