铜阳极泥碱性加压氧化浸出渣的硫酸浸出过程

针对铜阳极泥碱性加压氧化浸出渣开展硫酸浸出过程研究,考察硫酸浓度、温度、时间、液固比、搅拌速度和氧化方式等因素对浸出渣渣率和金属浸出率的影响.研究结果表明:金属浸出率随硫酸浓度的增加而提高,银的溶解尤为明显;硫酸浸出渣中未溶解的铜主要以单质存在,采用空气氧化方式可以提高铜的浸出率;在最佳条件即硫酸浓度为2.7 mol/L,温度为85℃,液固比为5∶1,时间为2h,空气压力为0.1～0.2 MPa和搅拌速度为300 r/min下,硫酸浸出渣率为60.0％,Cu和Te的浸出率分别为97.65％和77.53％,Ag和Sb的浸出率分别为8.95％和2.0％.     

FIDIC施工合同条件下变更与索赔的比较研究

变更和索赔是国际工程中经常出现的现象,也是国内外工程合同管理的重点和难点,处理上容易造成混淆．通过分析FIDIC施工合同条件下变更与索赔在定义、范围、性质、原因、处理原则、计价支付、处理程序上的区别以及两者的联系,系统研究了两者的关系,提出承发包双方在合同处理上既要区别又要善于把握联系．     

公共场所突发事件的应急管理研究

我国正处于经济和社会转型时期,国外不稳定因素、国内安全隐患及各种自然灾害,致使公共场所突发事件频发发生。国内外学者对公共场所突发事件的应急管理的研究多集中在应急体系和应急救援过程等方面,对于公共场所突发事件专业性机理和一般性机理的分析相对较少,缺乏体系性的应对机制。本文首先对公共场所的范围进行了界定,以肯德基的苏丹红事件为例,探讨公共场所突发事件的专业性机理,对公共场所突发事件的发生、发展、演化及终结等一般性机理进行了详细研究;最后,在机理分析的基础上,对公共场所突发事件应对机制进行分析和研究,具体包括事前的监控与预警机制、事中的处置与协调机制以及事后的恢复与评估机制。     

地震应急管理中的专业化分析——从救援、技术、物资、媒体、管理的视角

近年来我国地震灾害频发,给我国人民生命和物质财产安全带来很大的损失．地震应急管理能力的提高有利于减小地震带来的损失。本文以汶川地震和雅安地震为例,从救援、技术、物资、媒体、管理五方面入手,客观审视五年来中国在地震应急管理方面的专业化进展,从而发现问题,不断完善。     

水法热合成的K-OMS-2催化剂上甲苯气相氧化制苯甲醛反应研究

采用水热法制备了氧化锰八面体分子筛（K-OMS-2）,对其进行了XRD,FT-IR,N2-低温物理吸附和SEM表征,并考察了其对甲苯气相氧化制苯甲醛反应的催化性能.研究结果表明,所制备的K-OMS-2具有纳米纤维状形貌（直径约为30 nm、长度大于1 μm）.相对于固相法和热回流法,水热法制备的K-OMS-2催化剂上苯甲醛选择性和收率更高.     

Analysis of proteinaceous binding media used in Tang Dynasty polychrome pottery by MALDI-TOF-MS

The proteinaceous binding media used in Tang Dynasty polychrome pottery was determined using matrix-assisted laser desorption/ionization time of flight mass spectrometry (MALDI-TOF-MS). The optimum conditions for the extraction and subsequent enzymatic hydrolysis of the protein sample were established, and applied to the pretreatment of model and historical samples. Complexation of EDTA in combination with dialysis was determined to be the most effective method for eliminating interferences in polychrome layers taken from historical samples. Model samples were aged by burial in loess so as to more closely replicate the ageing process of the historical samples. Using the aforementioned optimized conditions, the "peptide mass fingerprint" of the binding media of historical and model samples was determined by MALDI-TOF-MS. Comparisons between the "peptide mass fingerprint" obtained for the historical sample and those of the model samples proved that animal glue was used as the binding media for the Tang Dynasty polychrome pottery. It also shows that animal glue used as binding media enjoys a long history in China.     

Solar influenced late Holocene temperature changes on the northern Tibetan Plateau

Considerable efforts have been made to extend temperature records beyond the instrumental period through proxy reconstructions,in order to further understand the mechanisms of past climate variability.Yet,the global coverage of existing temperature records is still limited,especially for some key regions like the Tibetan Plateau and for earlier times including the Medieval Warm Period(MWP).Here we present decadally-resolved,alkenone-based,temperature records from two lakes on the northern Tibetan Plateau.Characterized by marked temperature variability,our records provide evidence that temperatures during the MWP were slightly higher than the modern period in this region.Further,our temperature reconstructions,within age uncertainty,can be well correlated with solar irradiance changes,suggesting a possible link between solar forcing and natural climate variability,at least on the northern Tibetan Plateau.     

飞轮电池控制技术与发展

随着飞轮电池成功地应用于电机稳定顺行和UPS,飞轮储能系统（FESS）得到了越来越多的国内外专家学者的关注与研究。作为一种典型的机电磁一体化产品,其研究涉及到机械、材料、电工、热工、计算机等多学科的交叉;而如今,在这些相关领域巨大的科技突破,使得飞轮电池具有更加强大的生命力。针对该领域近年来的发展现状,论述了FESS主要研究成果,着重分析了其控制方面的发展研究现状。     

防火墙技术分析

网络安全日益成为难题,防火墙的产生是大势所趋,而防火墙技术日益成为关系网络安全的关键技术之一.先进的防火墙技术和合理的安全策略与配置必将成为网络的一道坚实的屏障.     

西藏地区计算机教学改革探讨

教育改革是随知识经济兴起而出现的一种趋势,是素质教育的核心。民族地区的教育改革是全国教育改革的重点,是提高民族地区教学质量、培育创新人才的关键。文章就如何把教育改革与西藏地区计算机教学相结合进行了探讨。