典型矿床深部盲矿预测的构造叠加晕实用模式

通过2个典型矿床的预测实例,阐述了构造叠加晕实用模式的特点和应用准则,使构造叠加晕法应用于深部盲矿找矿预测的思路更加清晰,方法便易操作,找矿效果更显著。构造叠加晕法只用于构造带内原生叠加晕轴向分带及叠加结构的研究,采样位置集中在构造带内热液叠加部位,大大减少了采样和样品加工分析的工作量,加大了预测深度,提高了盲矿预测的准确性。构造叠加晕实用模式是在构造叠加晕模式的基础上,突出了构造叠加晕法与成矿规律研究相结合开展找矿预测的新思路,具体步骤包括：研究已知矿体的赋存特点,从而确定有利的成矿空间;根据构造叠加晕实用模式和盲矿预测标志,判断有利成矿空间是否存在有盲矿。     

内蒙红花沟金矿床地质特征与原生晕深部预测

内蒙红花沟大型金矿床是华北地台北缘赤峰-朝阳金矿化集中区重要的矿床类型之一。矿床产于太古代建平群深变质岩中，矿体产出受NW向断裂构造控制，金矿化与中生代侵入岩关系密切，矿石类型主要为石英脉型。在充分了解矿床地质、矿化特征的基础上，对该矿床H2号脉的地球化学特征、深部原生晕分带规律进行了研究，发现该矿脉垂向上具有明显的分带性，该垂向分带在红花沟矿区具有普遍性，正确识别这种分带对于红花沟金矿床深部预测具有重要意义。同时确定了红花沟金矿床原生晕轴向分带序列（As—Sb—Ni—Cu—Co—Zn—Pb-Ag-Hg—Au—Mo—Bi）为一典型的正向分带序列，在此基础上对矿床的深部成矿前景进行了预测。     

夜景照明中颜色的退晕推移方法

着重介绍了夜间照明中利用颜色变化来体现建筑立面泛光照明的层次感，颜色的退晕推移处理手法是达到这一目的的好方法。由建筑物表达的颜色相协调原则选择了投射光源后，可根据物体色的色品坐标计算方法，算出经过外墙表面反射后三刺激值大小和色品坐标。在本文中考虑了外墙表面各点处投射光和反射光情况差别产生的影响，建议了一个逐步逼近的计算方法：可先算出楼身上部和下部垂直线上两点处色品坐标，再调整投光灯位置的灯具，直至更换光源等，尽量使垂直线方向上各点处色品坐标落在上述上下两点色品坐标；色度学连线上或附近，从而实现颜色的退晕推移效果。     

Color Halo/Horns and Halo-Attribute Dumping Effects within Descriptive Analysis of Carbonated Beverages

ABSTRACT:  Training panelists to focus on and evaluate a specific set of attributes is difficult. While every attempt is made to eliminate bias, such as methodology, panel influence, and product differences, unknown halo/horns effects may still influence the data collected. The objectives of this research were to (1) determine if a halo/horns effect of color exists in evaluating commercial cola and lemon/lime flavored carbonated beverages, and (2) determine if a halo-attribute dumping effect on mouthfeel attributes exists by aroma, aroma-by-mouth, taste, and afterfeel attributes. Ten panelists were trained to describe aroma, aroma-by-mouth, mouthfeel, taste, and afterfeel attributes of carbonated beverages. Each of the 6 carbonated beverages was evaluated by 3 treatments: (1) as is , (2) mix no color , and (3) mix with color . In the 1st set of product evaluations, all products were evaluated for mouthfeel attributes alone. In the 2nd of product evaluations, all products were evaluated for aroma, aroma-by-mouth, mouthfeel, taste, and afterfeel attributes. Color halo/horns effects were shown on mouthfeel intensity scores of lemon/lime carbonated beverages when caramel color was added. Adding caramel color significantly increased (halo effect) perceived body and mouthcoating and significantly decreased (horns effect) bite, burn, numbing, and carbonation attributes. A halo-attribute dumping effect was observed when mouthfeel attributes were rated exclusively compared to when other attributes in the modalities of aroma, aroma-by-mouth, taste, and afterfeel were rated in addition to mouthfeel attributes. Perceived intensities of bite, burn, numbing, and astringent attributes significantly increased (halo-attribute dumping) when rated alone compared to when all attributes were rated.     

G.657光纤熔接和熔接损耗测试

在G.657.A2光纤推广和使用过程中,熔接和熔接损耗的测试出现了比较突出的问题或认识误区,本文分别针对"黑线"和"晕环"现象、熔接参数调整、OTDR测试熔接损耗"大正大负"等方面的问题进行了解释和汇总。     

崤山地区申家窑金矿床原生晕组合特征与成矿阶段划分研究

为有效划分申家窑金矿床成矿阶段,更好地指导矿床开展地质调查工程,本次工作以成矿成晕元素原生晕地球化学组合特征为研究对象,利用SPSS软件开展了元素相关性分析、聚类分析、因子分析等组合特征研究,并结合矿区地质特征和前人研究成果,取得如下认识：相关性特征显示与Au相关性较好的元素有Cu、Pb、Zn、Sb、Ag和Bi,表明相似的分布规律和富集规律;聚类分析研究认为Pb、Zn、Au、Sb、Cu、Bi、Ag为一类,表现为主成矿元素之间的关系,为重要的地球化学找矿标志。因子分析获得三个主因子,其中第一主因子(F1)为Ag、Zn、Pb、Bi、Au、Cu、Sb占据主导位置,显示Ag、Zn、Pb、Bi、Cu、Sb与Au矿化密切相关,推测为一次中低温成矿阶段,为主要的成矿作用;成矿活动划分为3个阶段,分别为石英—菱铁矿阶段、石英—多金属硫化物阶段以及石英—黄铁矿阶段。根据矿床原生晕组合特征和分带特征,对矿床开展了深部找矿预测,显示了良好的深部找矿前景。通过上述研究工作,深化了崤山地区成矿规律认识,为申家窑金矿床乃至崤山地区金矿地质调查工作提供理论支持。     

具有颜色保真性的快速多尺度Retinex去雾算法

针对MSR算法在图像去雾应用中存在颜色失真现象且计算量大的问题,提出一种具有颜色保真性的快速MSR去雾算法。通过将MSR算法对RGB三个颜色通道的处理转变为仅对暗原色单一通道进行处理,避免了对颜色通道间色调相关性的影响,实现颜色保真,同时大大减少了算法执行时间。实验结果表明该算法克服了MSR去雾算法的颜色失真问题,能够有效提升图像的对比度和饱和度,实现图像快速去雾。     

A Convenient Procedure for the Synthesis of Acetals from α‐Halo Ketones

A study for determining the scope and limitations of a procedure for synthesising ethylene acetals from haloketones is presented. The method uses 1,2‐bis(trimethylsilyloxy)ethane, BTSE, as reagent and Nafion^®‐TMS as catalyst. Two procedures have been tested: (A) stoichiometric amounts of the haloketone and BTSE and a catalytic amount of Nafion^®‐TMS were heated to reflux in chloroform solution, and (B) stoichiometric amounts of the reactants and a catalytic amount of Nafion^®‐TMS were heated to 90–100 °C in the absence of solvent. The following ketones have been tested: 2‐bromo‐1‐phenyl‐1‐ethanone, 2‐bromo‐cyclopentenone, 3‐bromo‐3‐methyl‐2‐butanone, 3‐chloro‐3‐methyl‐2‐butanone, 1‐bromo‐3,3‐dimethyl‐2‐butanone, 1‐chloro‐3,3‐dimethyl‐2‐butanone, 2‐bromocyclohexanone, 2‐chloro‐1‐cyclohexyl‐1‐ethanone, 1,1‐dibromo‐3,3‐dimethyl‐2‐butanone, 1,3‐dibromo‐3‐methyl‐2‐butanone, 1,3‐dibromo‐2‐butanone, 1,3‐dibromo‐2‐propanone, 2‐chloro‐1‐phenyl‐1‐ethanone, and endo‐2‐bromocamphor. Yields were in the range 57–100% with the exceptions of endo‐2‐bromocamphor which afforded <10% yield and the dibromoketones 1,1‐dibromo‐3,3‐dimethyl‐2‐butanone and 1,3‐dibromo‐3‐methyl‐2‐butanone for which the method failed. Factors determining the scope and limitations are briefly discussed. Full experimental details and spectroscopic data of the acetals are given.