钽粉氧含量对其钽阳极漏电流的影响

在多年实践经验基础上，用氧含量Ｘ１（质量分数）０．２０％～０．３８％的四种钽粉，控制钽阳极中残余氧含量Ｘ２（质量分数）在０．０８％～０．２０％间，采用正交设计实验研究了对其漏电流的影响，并建立了漏电流峰值ＩＬ和Ｘ１、Ｘ２间的预示方程，描述了漏电流和钽粉氧含量（Ｘ１）、残余氧含量（Ｘ２）间的关系。随后，用预示方程讨论了钽中氧和钽阳极中残余氧对其漏电流的影响。     

椭圆孔六角点阵聚合物光子晶体光纤的偏振特性研究

基于全矢量平面波方法,以聚甲基丙烯酸甲酯为基材,设计了一种高双折射光子晶体光纤,并对其传输性质和偏振特性进行了数值模拟。结果表明,椭圆孔六角点阵聚合物光子晶体光纤的双折射是由于包层的不对称性引起的全局双折射,通过调节椭圆率,发现该光纤可以以单模方式在一合适波段运行,该波段与聚合物光纤的低损耗通信窗口一致。并且在 时,其双折射最高可达 。该研究结果为高双折射聚合物光子晶体保偏光纤的制备提供了理论依据。     

某含金高硫铜矿石浮选试验研究

采用新药剂对某含金高硫铜矿石进行了系统浮选试验研究.通过对比试验,发现采用传统的捕收剂黄药和黑药选别含金高硫铜矿石,虽然能够有效地回收含金硫化物,但获得的精矿产率高,铜和金的品位低,很难售出.而采用新药剂选别该类型矿石,可以使问题得到有效解决.新药剂对硫化铜矿物具有非常好的选择性,在粗选阶段采用新药剂可以有效回收硫化铜矿物,获得合格的铜精矿;在扫选阶段,采用黄药和黑药可以有效回收黄铁矿和其他硫化矿物,保证铜和金的回收率;扫选中矿单独处理,中矿采用六偏磷酸钠分散剂来消除矿泥对精选作业的影响,精选获得的混合精矿可以直接销售.     

超小型生产勘探在矿石质量均衡方面的应用

本文介绍了乌海矿业公司的生产现状，以及采用Dpp100—4型汽车钻机进行超小范围生产勘探，在矿石质量均衡方面的具体应用。     

Does extrinsic goal framing enhance extrinsic goal-oriented individuals' learning and performance? An experimental test of the match perspective versus self-determination theory.

Previous work within self-determination theory has shown that experimentally framing a learning activity in terms of extrinsic rather than intrinsic goals results in poorer conceptual learning and performance, presumably because extrinsic goal framing detracts attention from the learning activity and is less directly satisfying of basic psychological needs. According to the match perspective, experimental extrinsic, compared to intrinsic, goal framing should enhance learning and performance for learners who personally hold a stronger extrinsic than intrinsic goal orientation, as these learners' personally held goals match with the situationally induced goals. An experimental field study among 5th-6th grade children shows that extrinsic goal framing resulted in poorer autonomous motivation, conceptual (but not rote) learning, and persistence compared to intrinsic goal framing, irrespective of participants' personal intrinsic versus extrinsic goal orientations and their spontaneous perception of the learning activity as serving an intrinsic or an extrinsic goal. The authors conclude that teachers can best promote intrinsic goals, even when facing students who personally hold a stronger extrinsic than intrinsic goal orientation. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

与闪长岩类有关的金矿及其特征与意义

基于前人大量研究成果及笔者近年的工作,对与闪长岩类有关的金矿进行了详细总结,包括大地构造背景、产出地质条件、矿化蚀变特征与富集规律等,并结合国内外许多具体实例探讨了矿床成因。与闪长岩类有关的金矿通常富贱金属硫化物,Au品位多大于10×10-6,虽然规模不一定很大,由于高Au品位其经济意义显著。从找矿角度,文中概括出大地构造部位、控矿围岩与构造条件以及特征蚀变等标志为锁定该类矿床找矿靶区的重要依据。     

水厂铁矿铁精矿品位整体动态优化

以提高从矿山至高炉炼铁厂的综合效益为目标,开发了用于优化铁精矿品位的专用软件,用模糊综合评判法确定优化的铁精矿品位.当铁精矿品位、成本和生铁价格改变时,可用该软件评估采矿、选矿、烧结、球团、炼铁的总效益和生铁产量.在建立选矿、烧结、球团、炼铁数学模型的基础上,用该软件进行了水厂铁矿精矿品位的优化,得出水厂铁矿优化的精矿品位是TFe67.92%.     

Reactivity to a laboratory stressor among individuals with bipolar I disorder in full or partial remission.

Strong links have been documented between life events and the course of bipolar disorder. Laboratory studies of stress provide an opportunity to understand the mechanisms involved in reactivity to stressors, but few such studies have been done in the bipolar field. In the current study, 28 people with bipolar I disorder in full or partial remission and 40 people with no history of a mood disorder were randomly assigned to 1 of 3 conditions involving different levels of failure feedback on a concept formation task. Confidence, affective reactions, and performance on a subsequent anagram task were assessed. Results provide tentative support for reactivity to the stressor among the bipolar group, although reactivity was limited to impaired anagram performance. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

200m~3充气机械搅拌式浮选机在铜矿的应用

浮选机大型化是世界潮流,本文研究了目前国内工业应用单槽容积最大的浮选机——200m3充气机械搅拌式浮选机在铜矿上的应用情况,包括带矿性能和工业应用效果。和江西铜业公司一起测定了浮选机的矿浆悬浮能力、对不同粒级矿物的分选效果、浮选机功耗、带矿条件下的充气量。结果表明200m3充气机械搅拌式浮选机设备运行平稳,浮选效果好。工业试验累计指标与对比流程指标相比:在给矿铜品位相当情况下,回收率高6.77%,浮选效率高6.95%。     

干磨干选工艺在赤城选矿厂中的应用

赤城鑫宇选矿厂工艺流程设计中采用了干磨干选的新工艺，用来处理全铁品位为13％左右的原矿。该工艺中将原矿用干式棒磨机磨至4mm～0mm，然后进行干式磁选甩尾，甩尾产率达到36％，甩尾后原矿TFe位可达到18％，提高了入湿磨、选别的品位，有效地降低了下段磨矿的费用。该工艺投入运行后，生产情况良好。