河北省城市建设水平的主成分分析

采用主成分分析法,通过选取代表城市规模、服务水平和经济活动的32个指标来综合研究河北省的城市建设水平。结果发现在河北省范围内,城市建设的水平相差很大：石家庄、唐山稳居前两位,其它城市的城市建设水平较低。当采用相同指标将研究对象扩展到全国279个城市时,以石家庄为代表的河北城市建设水平排在全国第17位,硬件和服务水平远远落后于同等经济发展水平的其它地区,与河北省经济总量全国第六位的身份极端不相符。因此,河北城市建设总体水平有待提高,基础设施建设、服务水平和经济活动水平都有待加强。     

中国城市正在向功能专业化转型吗?——基于跨国公司区位战略的透视

发达国家城市正向功能专业化转型,企业组织形式变革直接导致了城市的功能转型。在功能专业化背景下,城市间将出现更多的信息联系、决策联系以及资本联系,更需要面对面的交流。一些城市专业化高端功能,成为区域的控制中心,另一些城市则承担价值链的低端功能。本文基于全球500强跨国公司在华投资数据,探讨中国城市功能专业化趋势。在1979～2008年间,跨国公司在地理和功能上都显著地进行了扩张。跨国公司相同功能和互补功能集聚在相同城市,跨国公司的渐进式多次投资导致了公司内不同功能在相同城市的地理集聚。本文结果表明,中国城市尤其是在城市体系高端的城市具有吸引价值链高端功能的竞争力,呈现一定功能专业化趋势。跨国公司在东道国内部的功能布局提供了考察城市经济转型的独特视角。     

功能翻译理论视野下的旅游外宣文本研究

中国即将成为世界上最大的旅游目的地国。旅游外宣文本在提供信息,吸引潜在游客,促进中国旅游业的发展和文化的传播等方面发挥着重要作用。本文通过对旅游外宣文本的类型和功能的分析,认为功能翻译理论在一定程度上对旅游翻译实践具有积极的指导意义。     

电器产品电源插头防触电检测方法研究

依据GB4943《信息技术设备的安全标准》及GB8898《音频、视频及类似电子设备安全要求》标准，本文对音视频产品及信息技术设备在插头放电的防电击设计要求及检验其合格性的测试方法上进行了分析和研究，给出了要保证产品设计的安全性，应关注产品结构设计要求及准确的测试方法，对正确评价产品设计的安全性能、提高和加强产品使用的安全性都具有重要的指导意义。     

Sanyal and Jones on trade in middle products

This paper reports, for the first time, empirical estimates of one of the most ingenious models of trade in intermediate products – the model of Sanyal and Jones. We show how the restrictions implied by the Sanyal and Jones production structure can be imposed and tested with the help of aggregate data even though information about the allocation of inputs and outputs between tiers and industries is not available. A new theoretical concept, that of 'disjoint production' is introduced. We also propose a new functional form that is a generalization of the Symmetric Normalized Quadratic restricted profit function.     

The Italian way to functional separation: An assessment of background and criticalities

The paper describes the approach to functional separation followed in Italy. The analysis places the notion of functional separation in the context of the reform of the European Regulatory Framework in particular the Access Directive of the European Commission. It concentrates on the two main aspects of functional separation in the Italian telecommunications market: (i) the creation of an Open Access unit and (ii) the undertakings suggested by Telecom Italia and approved by AGCOM with the Decision 718/08/CONS. The paper shows that even if these measures are primarily aimed at fostering transparency, promoting equal access and non-discrimination practices, some doubts remain with respect to the impact of functional separation on incumbency of Telecom Italia. It proposes that the outcome of functional separation will have to be determined by joint efforts of regulation by AGCOM and changes in the strategy of Telecom Italia.     

The economic impact of galantamine vs placebo: An analysis based on functional capacity in a Swedish cohort study

Abstract

Objective:

To analyse the economic impact of galantamine, based on basic activities of daily living (ADL).

Methods:

Data were derived from Swedish patients enrolled in a 6-month placebo-controlled trial of galantamine (GAL-INT-1; n?=?80), and from the Kungsholmen–Nordanstig Project, a longitudinal study of 919 elderly persons in Sweden. Basic ADL were assessed using the Katz’ Index of Independence in Activities of Daily Living (ADL) (number of ADL lost [dependency in 0, 1–2, 3–4, or 5–6 ADL]). Costs were appraised based on regression analysis and on costs directly linked to ADL. Six-month costs for galantamine and placebo were calculated.

Results:

In the regression analyses, each increase in a Katz stage was associated with an annual cost increase of SEK 81,415–83,683 (～€8000). Results were similar using stage-specific costs. Overall, there was a small, non-significant numerical cost benefit for galantamine indicating cost neutrality.

Limitations:

The small number of Swedish patients in the GAL-INT-1 study, which was not powered for economic outcomes, limits the statistical power of the analysis. In addition, long-term outcomes are difficult to assess in persons with dementia because of practical and logistical problems.

Conclusions:

The benefits of galantamine in patients with AD can be achieved with no increase in cost. Combined with positive effects in terms of outcome, treatment with galantamine can be regarded as cost-effective using a cost–consequence approach.     

红景天黑玉米复合功能饮料的研制

用乙醇提取法从红景天根茎中提取分离得到有效成分红景天甙提取物,并与黑糯玉米原料配伍,制成风味独特的红景天黑玉米复合功能饮料。经正交设计试验得到优选的工艺参数和配方,即红景天甙粗品用量0.05%,玉米提取液用量25%,蔗糖用量9%,柠檬酸用量0.20%。     

Non-Existence of the First Moment of the Adjusted Least Squares Estimator in Multivariate Errors-in-Variables Model

The linear normal multivariate errors-in-variables model is considered. The model involves an equation error. It is proved in both structural and functional cases that the first moment of the adjusted least squares estimator does not exist.     

浅析新型建筑电气火灾监控系统的标准及特点

随着我国各行业的迅猛发展,每年电气火灾呈上升发展趋势,电气火灾监控系统作为一项可以主动预防电气火灾发生的新技术在被越来越广泛的应用。这就使得电气火灾监控系统中剩余电流式电气火灾监控系统设计和应用的研发也越来越重要。