鸡蛋壳制备乙酸钙冰雪融化剂的研究

以鸡蛋壳为原料,对高温煅烧分解蛋壳、中和法制备乙酸钙(CA)的最佳反应条件进行了研究,试验结果表明:在所选参数下,其产量最大.即反应温度为50℃,配料摩尔比为CaO:HAc=1:2.8,乙酸浓度为15 mol/L,石灰乳浓度(以氧化钙计)为1.3 mol/L.产品融冰试验表明:CA在环境温度为-10℃以上使用时,其融冰效果较好.     

一种私钥管理实现技术

在对私钥管理技术深入研究的基础上，设计了一个私钥管理系统，并从系统的角度分析了私钥管理过程中所遇到的各种风险和最大程度地降低风险的方法。     

Tent City: Patterns of Informality and the Partitioning of Sacramento

Unsanctioned tent cities are increasing in number in cities throughout the western United States. Scholars explain the phenomenon as homeless people asserting their ‘right to the city’ or as ‘managed marginality’. These explanations capture much of the socio-political relationship between local government and homeless populations, but do not explain the long-term persistence of tent cities and the fluctuating nature of their visibility. A spatial history of informal encampments in Sacramento at three key moments—the founding of the city, the Great Depression and the Great Recession—reveals a long-term ebb and flow of tent cities occupying close-to-the-center, urban vacancies. Urban vacancies arise from the partitioning of the city into specific purposes, places and people, a taken-for-granted perception of how cities should be. The visibility of tent cities disrupts this aesthetic notion of stability and growth as homeless people use the tent to protest their isolation and exclusion.     

CRTSⅡ型板式无砟轨道用CA砂浆灌注施工关键技术

CA砂浆灌注质量控制对保证整个轨道板的施工质量非常关键。本文总体论述了CRTSⅡ型板式无砟轨道用CA砂浆灌注工艺,包括压紧装置的安装、封边、砂浆的运输、灌注、养生、缺陷的修补等相关工序的施工方法及关键技术,为确保CA砂浆灌注质量提供借鉴。     

两岸三地服务业国际竞争力比较分析

国际上常用的服务业国际竞争力主要评价指标包括MS(国际市场占有率)、TC(净出口指数)、RCA(显示性比较优势指数)和CA(显示性竞争优势指数)。文章根据联合国贸发会议的基础数据,分别计算、比较了两岸三地服务业的MS、TC、RCA和CA四类指数,并且分行业计算了两岸三地的RCA指数,进而分析了两岸三地服务业各自存在的问题。结论认为:从四类指数的计算结果看,香港在两岸三地中国际竞争力最强;内地服务业尤其是生产性服务业相对比较落后。文章最后探讨了两岸三地服务业的未来合作前景。     

浅谈电子商务中的中介组织

在电子商务飞速发展的今天,很多企业都在不同层度的涉及电子商务,但是中国的企业多数属于中小企业,它们大都缺乏一定的资金、人才、诚信度和独自从事电子商务的能力。面对这样的情况,需要有一些不同性质的中介组织来帮助中小企业解决从事电子商务中出现的问题。     

加工贸易、FDI与中国国际收支不平衡

自1994年我国实行汇率并轨制度以来,中国国际收支一直面临着经常项目与资本和金融项目双顺差的结构,产生这种结构的原因是多方面的,本文从以加工贸易为主的贸易特征和由于对外资优惠而吸收的大规模外商直接投资(FDI)这两方面入手,分析他们对中国国际收支不平衡产生的影响。     

Reining in auditors: On the dynamics of power surrounding an “innovation” in the regulatory space

In the aftermath of Enron and the collapse of Arthur Andersen, new “independent” institutions were created to oversee financial auditing. Based on a modified version of Lukes’ multidimensional model of power, we first investigate how the creation of the Canadian Public Accountability Board (CPAB) has affected the dynamics of power among the main players enlisted in Canada’s regulation of public accounting. Our findings strengthen the view that a “form of allegiance” was, at the time of data collection, developing between CPAB and the largest Canadian accounting firms. Through a second analytical movement, we extend the boundaries of our argument, showing that patterns of resistance against the logic of arm’s length regulation operate in a variety of audit regulatory sites. Our conclusion points, in particular, to the spatial gap - and incidentally the limitations - of any attempt to control and supervise a globalized industry from a national or regional perspective.     

刷卡消费中身份识别新方法探讨

验证身份与鉴别签名是日常生活中经常会遇到的,鉴别假身份证、鉴别假签名是一项技术要求非常高的工作。由于互联网的出现、信息安全技术的不断完善,例如RSA技术、PKI公钥基础设施、CA认证机构等,为简化鉴别手段、鉴别方法以及鉴别过程提供了有力保证。     

Capital expenditure decision making in small firms

A number of studies have been conducted to determine the extent to which large firms utilize sophisticated techniques in capital expenditure decision making. This research effort focuses on financial decision making procedures of small firms, exploring the techniques utilized to evaluate investment opportunities, methods employed to adjust for risk, purposes of expenditures and concern for profitability, and the source and cost of funds. In light of the recent debate on the capital shortage issue, small firms were also asked what type of tax reform they deemed most desirable to stimulate capital investments.