"SPEED"快速钻石切工评价--NCJV的钻石切工评估方法

澳大利亚珠宝评估师协会的“SPEED”方法,把切工分成5个步骤,能全面的对钻石的切工进行评价。本文将此法和现有国标和国内行业习惯作对比研究,将对国内刚刚兴起的珠宝评估行业产生指导意义。     

埃塞俄比亚染色欧泊的研究

目前,埃塞俄比亚染色欧泊在我国市场上屡见不鲜.本文采用常规宝石学测试手段、光谱分析、吸水实验、浸泡褪色实验和浸泡染色实验等方法对市场上常见的3种颜色的埃塞俄比亚染色欧泊进行了研究.结果表明,这些埃塞俄比亚染色欧泊主要通过浸泡于不同颜色的化学颜料溶液中上色,浸泡过程中往往添加含有羧酸根离子的表面活性剂或颜料超分散剂(如邻苯二甲酸酯),以使颜料颗粒分布更加均匀,这主要是由于埃塞俄比亚欧泊的孔隙度相对较大,对染料的吸附性相对较强.这些埃塞俄比亚染色欧泊的主要特征如下: ① 亚透明至微透明,染橙色和染蓝色样品具有弱至强的变彩,染黑色样品体色以灰蓝色或黄灰色为主,具有强烈的红色、黄色、绿色和蓝色变彩;透射光下照射,染黑色欧泊具有强至弱的红色调以及明显的染剂不均匀富集现象. ② 埃塞俄比亚染色欧泊和其天然欧泊一样吸水性强,吸水后密度、质量均有所增加,透明度增强,变彩可能会有所增强,也可能会有所减弱,染色欧泊密度范围为1.63～1.86 g/cm³,折射率在1.40(点测)左右,与天然欧泊一致,均低于澳大利亚和墨西哥的欧泊. ③ 在高倍显微镜下观察,染色样品颜色分布不均,内部常见色点、色斑、色块或色团分布,在表面部位染剂富集现象更为明显,常见染剂沿着边缘、刮痕或凹坑处富集. ④ 染色欧泊浸泡在不同的溶剂中会使溶剂变色. ⑤ 拉曼光谱表明,染色欧泊出现了很强的荧光背景及弱的热效应峰3 362 cm^-1,拉曼散射峰很弱. ⑥ 紫外可见光分光光谱表明,埃塞俄比亚染色欧泊与天然欧泊的吸收光谱不同.     

投稿须知

《宝石和宝石学杂志》主要报道国内、国际宝石学研究和珠宝科技的新成果与新动态,追踪珠宝市场信息,使之成为珠宝业对外宣传的窗口和引进国外最新成果的重要渠道。现设栏目有“研究与探讨”“珠宝检测”“宝石资源”“首饰设计”“宝石改善”“加工与制作”“珠宝评估”“珠宝营销”“宝石实验室快讯”“世界博览”“专家论坛”“行业聚焦”“热门话题”“宝石学教育”“珠宝之窗”等。本刊为季刊,大16开本,公开发行。     

投稿须知

《宝石和宝石学杂志》主要报道国内、国际宝石学研究和珠宝科技的新成果与新动态,追踪珠宝市场信息,使之成为珠宝业对外宣传的窗口和引进国外最新成果的重要渠道。现设栏目有“研究与探讨”“珠宝检测”“宝石资源”“首饰设计”“宝石改善”“加工与制作”“珠宝评估”“珠宝营销”“宝石实验室快讯”“世界博览”“专家论坛”“行业聚焦”“热门话题”“宝石学教育”“珠宝之窗”等。本刊为季刊,大16开本,公开发行。     

投稿须知

《宝石和宝石学杂志》主要报道国内、国际宝石学研究和珠宝科技的新成果与新动态,追踪珠宝市场信息,使之成为珠宝业对外宣传的窗口和引进国外最新成果的重要渠道。现设栏目有“研究与探讨”“珠宝检测”“宝石资源”“首饰设计”“宝石改善”“加工与制作”“珠宝评估”“珠宝营销”“宝石实验室快讯”“世界博览”“专家论坛”“行业聚焦”“热门话题”“宝石学教育”“珠宝之窗”等。本刊为季刊,大16开本,公开发行。     

投稿须知

《宝石和宝石学杂志》主要报道国内、国际宝石学研究和珠宝科技的新成果与新动态,追踪珠宝市场信息,使之成为珠宝业对外宣传的窗口和引进国外最新成果的重要渠道。现设栏目有“研究与探讨”“珠宝检测”“宝石资源”“首饰设计”“宝石改善”“加工与制作”“珠宝评估”“珠宝营销”“宝石实验室快讯”“世界博览”“专家论坛”“行业聚焦”“热门话题”“宝石学教育”“珠宝之窗”等。本刊为季刊,大16开本,公开发行。     

应用FTIR-SEM研究一类合成欧珀的微结构及其变彩成因机制

近些年来,相关人工合成欧泊的研究工作主要聚焦于天然与合成欧泊的鉴别与筛选,而相关合成欧泊的微结构、变彩机制及其中水的赋存状态的深入研究鲜见报道。本文通过傅里叶变换红外光谱(FTIR)、场发射扫描电镜(FE-SEM)对一类合成欧泊的微结构、结构缺陷进行较系统的研究。同时,结合对样品的热处理就该合成欧泊体色、变彩机制及其中水的赋存状态作了初步探讨。结果表明:该样品的红外光谱中,在约2900 cm~(-1)、1737 cm~(-1)处出现合成欧泊特征吸收,且在4000~6000 cm-1波段,合成欧泊相比天然欧泊的吸收峰更为复杂。合成欧泊的颜色由体色与变彩两者共同构成,该体色与存在于其微结构中准球状、粒径约205 nm的二氧化硅颗粒的间隙填充物直接关联,且在热处理条件下随着间隙物的析出而渐退。同时,该类合成欧泊的变彩归因于结构致色并由其内部SiO_2颗粒周期性排列而构成的三维的光子带隙结构所致。此外,在欧泊的微观结构发生重构前,变彩所呈现的颜色主要由准球状二氧化硅颗粒粒径与间隙填充物决定。     

《宝石和宝石学杂志》征稿简则

1办刊宗旨 《宝石和宝石学杂志》是教育部主管、中国地质大学（武汉）主办的珠宝类学术性期刊（国内外公开发行）,充分反映当代宝石学学科的研究方向与进展、珠宝检测技术、宝石资源、宝石优化处理、珠宝营销与贸易、宝石加工与制作、珠宝首饰评估、珠宝首饰艺术、珠宝首饰加工工艺、珠宝文化,珠宝教育等方面的成果,兼顾宝玉石鉴赏、经典宝玉石首饰评析,为引领宝石学学科研究发展,促进国内外信息交流,普及宝玉石科学知识,繁荣宝玉石市场服务。     

《宝石和宝石学杂志》征稿简则

《宝石和宝石学杂志》是教育部主管、中国地质大学（武汉）主办的珠宝类学术性期刊（国内外公开发行）,充分反映当代宝石学学科的研究方向与进展、珠宝检测技术、宝石资源、宝石优化处理、珠宝营销与贸易、宝石加工与制作、珠宝首饰评估、珠宝首饰艺术、珠宝首饰加工工艺、珠宝文化,珠宝教育等方面的成果,兼顾宝玉石鉴赏、经典宝玉石首饰评析,为引领宝石学学科研究发展,促进国内外信息交流,普及宝玉石科学知识,繁荣宝玉石市场服务。     

《宝石和宝石学杂志》征稿简则

1办刊宗旨 《宝石和宝石学杂志》是教育部主管、中国地质大学（武汉）主办的珠宝类学术性期刊（国内外公开发行）,充分反映当代宝石学学科的研究方向与进展、珠宝检测技术、宝石资源、宝石优化处理、珠宝营销与贸易、宝石加工与制作、珠宝首饰评估、珠宝首饰艺术、珠宝首饰加工工艺、珠宝文化,珠宝教育等方面的成果,兼顾宝玉石鉴赏、经典宝玉石首饰评析,为引领宝石学学科研究发展,促进国内外信息交流,普及宝玉石科学知识,繁荣宝玉石市场服务。     

论国际性珠宝首饰展览会的会展营销策略

研究国际性珠宝首饰展览会的会展营销策略对我国珠宝首饰展览会的提高与发展具有重要意义。通过实地考察和资料收集,运用营销学的知识总结了国际性珠宝首饰展览会的会展营销要素,并结合会展学的知识从规划展区、招揽客户、开展公关活动和管理客户关系等方面分析了其会展营销策略,旨在为国内珠宝首饰展览组织机构更好地举办珠宝首饰展览会提供一些参考。     

珠宝与奢侈品关系研究

珠宝与奢侈品的关系尚不明确,珠宝所具有的审美价值、经济价值和稀有性等特征属性是否赋予其成为奢侈品这一问题在珠宝学界和业界没有清晰的定论。从多学科角度研究奢侈品内涵和本质特征并构建奢侈品属性特征的五维度模型,利用该模型比较探讨珠宝与奢侈品的关系,明确珠宝商品属性。通过比较发现珠宝是奢侈品的良好载体,可以直接成为奢侈品。除此之外,为珠宝产品注入奢侈品元素,使更多珠宝产品能够进入奢侈品核心区域。最后,针对目前珠宝产业低水平竞争、产品同质化等难题提出建议。     

突破瓶颈 营销文化塑造品牌

中国石油工程设计有限公司（以下简称CPE）结合行业特点,建立了以人为本和客户导向的企业文化,并且以企业文化为营销对象,通过＂营销文化,塑造品牌＂,在行业内独树一帜,很好地实现了客户、员工和企业的共同成长。本文结合CPE塑造品牌的实践,给出了工程咨询设计企业营销文化树品牌的模式。     

Of silent maids,skilled gardeners and careful madams: gendered dynamics and strategies of migrant domestic workers in Accra,Ghana

Recent studies indicate that many migrants are engaged mainly in the informal sector in low-paid, short-term, and insecure occupations in cities. Using a qualitative research approach, this paper examines the gendered experiences, livelihood strategies and wellbeing of migrants engaged in domestic work in Accra, Ghana. Employing structure-agency theoretical perspectives, the paper also discusses how migrant domestic workers employ their own agency to counter exploitation. The findings show clear gendered patterns of employment in domestic work, with men having stronger agency to negotiate better conditions of work and remuneration. The paper argues that despite the heterogeneity and diversity of the work conditions and experiences of domestic workers in Accra, the importance of gender as a crucial factor mediating the experiences of both male and female domestic workers and their impacts on their wellbeing must be recognised in policies to address and regulate domestic work in Ghana.     

Conducting sensitive research in the present and past tense: Recounting the stories of current and former child domestic workers

In recent years, scholarship on children’s work has increasingly incorporated the perspectives of working children. Although laudable, this shift toward children’s inclusion in research has concentrated on those employed at the time of data collection. Former child workers have largely been overlooked as a source of information. This paper reflects on research conducted with current and former child domestic workers in Tanzania. The child domestic working experiences reported by those two groups diverged markedly: those who had already ceased employment reported far higher rates of dissatisfaction with child domestic work, and far more experiences of exploitation and abuse, than those who were still employed in the sector. This paper explores issues of memory, identity, representation and performance to propose explanations for such dissonance. It concludes that the (near) exclusive focus of the literature on children who are currently employed is of some considerable concern, as scholars often make practical and policy-oriented recommendations about children’s work on the basis of their findings. This paper makes a case that all ‘versions’ of a phenomenon offer (at best) partial insights into lived experiences and that researchers investigating sensitive issues, whether with adults or children, may benefit from conducting research in both the past and present tense.     

澳大利亚铀矿资源考察

澳大利亚铀矿资源丰富,是世界上最大的铀矿资源国。本文重点介绍了澳大利亚铀矿床类型和铀矿资源分布情况。了解澳大利亚铀矿产出的地质背景、成矿规律和控矿因素,对寻找铀矿资源具有十分重要的意义,这些经验可为勘查人员提供更多寻找铀矿的思路。我国铀矿勘查正处于新的发展时期,借鉴澳大利亚找铀矿思路和成功经验,开辟新区和矿区外围铀矿勘查,推进国内铀资源找矿突破。     

The competitive advantage of clusters: Cluster organisations and greenfield FDI in the European life sciences industry

This paper examines the effect of cluster organisations on the international competitive advantages of clusters in the European life sciences industry. Data on coordinated cluster organisations are used to assess whether cluster development policies enhance the attractiveness of clusters to multinational corporations (MNCs). We estimate mixed logit models using a sample of 481 greenfield investments by life sciences MNCs in West-European regions during the period 2010–2013. Contrary to the beliefs of policymakers, our results indicate that both the presence of cluster organisations and higher-order activities of cluster organisations have only a small effect in attracting greenfield investments. In addition, cluster organisations help attract economic activities with less specific location requirements, such as production plants and sales and marketing offices. This finding provides valuable insights for policymakers, as investing public funds in cluster organisations is not found to attract high value-added business activities, such as those that occur in headquarters and R&D facilities, which are often the target of such investments.     

Innovation,a neglected locational factor

The regional variation in the sales of a new product, a corrugated zink plate for roofing, is described and explained with the help of regression analysis covering a four year period following the product's introduction. Distance from the plant, share of rural population, income per capita, intensity of competition and a regional dummy explain 76–90 % of the regional variation in a year. As the product commands a practically uniform price and has identical availability irrespective of customer location, and as official marketing information is centralized and therefore also uniform, the distance and dummy variables should not appear in the regression equation. Their actual appearance and the positive sign of the competition-variable are explained by the spatial innovation effect. Its significance is evaluated and measures are suggested for its exploitation.     

Rethinking the ‘domus’ in domestic violence: homelessness, space and domestic violence in South Africa

An examination of domestic violence and where it takes place provides significant insight into debates about the meaning of home. It is argued here that discussions of domestic violence could make more use of feminist geographers’ and development theorists’ analyses of the home. Examining the experiences of homeless and insecurely housed women in Durban, the paper aims to explore ideas of ‘home’ implicit in much research on domestic violence and argues that these ideas require further examination. The paper focuses on three assumptions about the home (in experiences of domestic violence); namely, the home as a formal material space, the home as private, and the domicile as home. In conclusion the paper argues for a more nuanced understanding of home.     

浅谈勘测设计企业应收账款的管理

不少企业销售业绩连年增长,却常常不能如期收到账款,造成资金紧张。根据某项调查,目前我国企业中应收账款已经占到流动资产的40％～45％,其中逾期一年以上的帐款又占很大比例。对于应收账款的有效管理已成为企业经营活动中日益重要的课题。