云南某地金矿工艺矿物学分析研究

文章通过化学分析、显微镜及扫描电镜分析手段,对云南某地金矿石中金的赋存状态、矿石的物质组成、矿物的嵌布特征等进行了详细研究,结果表明,矿石中金矿物为碲金矿,主要载金矿物为黄铁矿。     

甘肃省徽县洛坝金矿床矿石特征研究

洛坝金矿床矿石工艺类型为贫硫化物全氧化含金矿石类型,矿石中金矿物为自然金及银金矿,有害元素炭品位为﹥0.1%,金矿物粒度细小,赋存状态以裂隙金为主,次为粒间金、包裹金;载金矿物主要为褐铁矿,粒度粗细不均,大部分粒度较细;通过对矿石质量研究,为选矿试验提供必要参数,并为矿床下步开发提供依据。     

稀有金属矿床综合经济评价的几个问题

论述了稀有金属矿床开展综合经济评价的意义和伴生金属、矿石中造岩矿物、贫矿石的综合经济评价方法,以及矿床综合经济评价的几个主要影响因素。     

宽甸县蔷薇辉石工艺性质研究及市场价值分析

蔷薇辉石作为一种优质的玉石材料,随着国内珠宝玉石市场的发展,市场需求和价值在不断的显现。在我国北京、吉林、四川、青海、陕西等地均发现有规模的蔷薇辉石玉石资源,并且在相当多的金属矿区有蔷薇辉石的伴生产出。丹东市宽甸县某金属矿在开采过程中也发现一定量蔷薇辉石矿石,部分矿石样品被送到辽宁地质工程职业学院玉石雕刻实验室作为实习材料。本文通过对教学过程中使用的矿石样品进行测试,并与市场采购到的蔷薇辉石工艺品进行对比,探讨金属矿伴生的蔷薇辉石是否具有工艺价值。     

长风破浪会有时 直挂云帆济沧海

废钢超市采取会员制,以废钢为主,废有色、冶金原材料为辅。利用中金集团现有的码头,打造成实体超级市场。利用中金集团的网站,做成电子商城。同时利用中金集团的平台,提供货物金融服务、信息服务。     

回收铁矿中伴生磷的浮选研究

为了充分回收矿石中更多有价值的矿物,减少资源的浪费,文章以铁矿中伴生磷矿为研究对象,对原矿进行了工艺矿物学分析,采用BK420捕收剂对磷矿进行浮选研究。经过条件试验研究,在最优试验条件下进行闭路试验,获得的磷精矿中P_2O_5品位为34.65%,回收率85.38%的指标,实现了对铁矿中伴生磷矿的回收。最后对浮选产品进行检查和分析,绝大部分磷的损失主要集中在0.043mm以下较细的粒级,并提出了减少金属损失,提高磷矿浮选回收率的方法。     

西藏某锑铅锌复杂多金属矿综合回收研究

复杂多金属矿分离回收是目前选矿面临的技术难题,也是解决资源短缺形势的有效手段。西藏某多金属矿有价元素为锑、铅、锌及伴生元素银,主要锑铅赋存矿物为脆硫锑铅矿,主要锌矿物为闪锌矿。矿石矿物组成复杂,有用矿物嵌布粒度细,共生紧密。针对该矿石性质,考虑经济技术指标,采用锑铅-锌优先浮选,阶段磨矿阶段选别的工艺流程,获得锑铅精矿锑品位30.31%、回收率90.76%,铅品位25.33%、回收率90.45%,银品位1899.40 g·t-1、回收率87.46%,锌精矿54.71%、回收率89.50%的选矿指标,此结果可作为该类矿石生产的技术依据。     

宝钢矿石料场库位分配优化数模研究

矿石料场库位管理是钢铁企业原料物流管理的重要组成部分.以宝钢矿石输入系统为背景,综合考虑影响矿石料场管理的矿石输入计划、料场矿石存量现况、矿石输出计划等诸多因素,建立了矿石料场位置分配整数规划模型.并且经转变,给出了基于运输问题算法的模型优化求解步骤.案例分析表明此算法是实用和有效的.     

实施联合重组打造行业旗舰潼关中金黄金矿业有限责任公司成立

11月26日下午，潼关中金黄金矿业有限责任公司剪彩揭牌仪式隆重举行。标志着中金黄金股份有限公司与潼关县黄金企业的整合取得了圆满成功。     

铅试金法一次试金中金补偿系数研究

用铅试金法分别对铜精矿、粗铜、镍精矿、低冰镍、高冰镍等冶金物料进行一次试金,将熔渣和灰皿进行二次试金,测得一次试金和二次试金所得贵金属合粒中的金量,得到一次试金中金的回收率.随样品中金量的增加,一次试金中金的回收率随之增加.     

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.     

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.     

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.     

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.     

Introduction of New Technology with a Sound Transition of the Input-Output Structure

We examine the general equilibrium repercussions associated with the introduction of new technologies, using the generalized Leontief system that allows technological substitutions. We show that an untested introduction of cost-increasing technologies in any industry may result in creating a non-productive technological structure that does not satisfy the Hawkins-Simon condition, following the autonomous dynamic adjustment process with structural transitions in the economic system. Therefore, we propose a practicable control scheme of introducing cost-increasing technologies that strictly avoids the creation of non-productive structures in all periods of structural transition, using the available information on the ex ante technological structure.     

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.