应用多重分形奇异值分解(MSVD)技术提取钦杭成矿带南段文地地区Cu-Pb-Zn矿致地球化学弱异常

基于Matlab平台编制的多重分形奇异值分解程序,可以有效地从钦杭成矿带南段文地地区比例尺1∶50 000水系沉积物数据中提取Cu-Pb-Zn矿致地球化学弱异常。结果表明,多重分形奇异值分解技术能够克服Ag、Au矿引起的Cu、Pb、Zn高背景的影响,并从多重地球化学背景中有效提取矿致异常,包括低背景中的弱异常和隐蔽异常。该方法揭示了一系列Cu、Pb、Zn统计方法圈定的异常图上没有显示的、规模不等的矿化异常,其中的一些异常和一系列矿床、矿点、矿化点重和,在未知区得到的弱异常也有进一步开展工作的意义,这为该区矿床勘查提供了新的靶区,为未知矿床的探寻提供了新的启示。     

Mechanical properties of a novel,lightweight structure inspired by beetle’s elytra

A new kind of bio-inspired, lightweight struc- ture was designed and built from carbon fibre prepreg based on the cross-sectional microstructure of a beetle＇s elytra. The compression strength and failure process of the resulting structure was analysed using the finite element method; while at the same time, a quasi-static compression experiment was performed using an electronic universal testing machine to verify the effectiveness and accuracy of this finite element method. This bioinspired structure was compared against a conventional honeycomb structure using FEM, revealing that for a given porosity and load parallel to the axis of the core tubes the respective compressive and specific compressive strengths of the bio- inspired structure are much higher at 84.3 MPa and 194.7 MPa/（g cm^-3）; thus demonstrating that this bioinspired structure has superior compressive capability.     

Insight into the covalent grafting of organic films onto carbon steel surfaces for protection

The novel use of p-nitrophenyldiazonium tetrafluoroborate salt(GG salt)as a protectant that is electrochemically grafted onto carbon steel has been investigated in0.05 mol L-1H2SO4and 5 wt%NaCl solutions using various corrosion monitoring techniques,such as electrochemical impedance spectroscopy,potentiodynamic polarisation,infrared spectra and scanning electron microscopy measurements.The electrochemical study reveals that this compound is a mixed inhibitor that predominantly controls the cathodic reaction.The surface-grafted film decreases the double-layer capacitance and obviously increases the charge transfer resistance relative to a bare carbon electrode.The values of inhibition effect remain nearly unchanged with an increase in temperature range of 298–318 K.The aryl diazonium is covalently bonded on the steel surface,causing a slight decrease in the apparent activation energy.Overall,the surface-grafted films exhibit excellent inhibition performance in acid and saline solutions within the studied temperature range.     

脉冲阴极弧放电制备碳膜及其性能研究

使用自行搭建的高压脉冲大电源,并且利用PLC的控制SCR触发装置产生微秒级单脉冲进行了弧光放电。在一定电压、一定气压、一定距离下,进行了薄膜制备,对薄膜进行了电镜分析和XRD分析。说明在合适的电压、气压和距离下,用该套设备可以制备出比较均匀、结晶性能比较好的薄膜。     

包含平面四价碳的一个新家族(英文)

本文预测一类由碱土金属包围的含平面四价碳的新化合物,通过原子轨道分析和对键临界点的拓扑电子密度分析分别研究了其电荷稳定和成键情况。并且研究了分子的磁性质。这些包含平面四价碳的分子体系通过电子和力学性质得以稳定。D4hSi4B4H4还可以用来稳定平面四价氮离子。     

ROCKWELL工控软件在三工位成型机中的应用

德国KHD公司生产的三工位振动成型机在炭素行业生产有着广泛的应用,本文主要阐述该设备的自控系统LOGIX5000编程软件和RSVIEW32在线监控软件的应用。     

电喷发动机积碳的处理与预防

随着多点燃油喷射发动机的普及,电喷发动机燃油系统和进气系统的积碳现象日益增多,一些由于积碳而引起的特有故障现象也随之而来.在汽车维修中对于积碳的诊断一向是个难题,要让车主自己去分辨是否有积碳产生更是难上加难,与其出了问题再修不如防患于未然,用日常维护的手段来保持车辆的正常使用性能.介绍了几种减少和预防积碳产生的方法.     

Comparisons of low carbon policies in supply chain coordination

This paper investigates the influence of low-carbon policies on channel coordination for a two-echelon supply chain consisting of one supplier and one retailer. Four different models are considered： the basic model, the carbon emission model, the carbon emission trading model and the carbon tax model. We find that the government policy on all carbon emission models is not universal among the firms as well as the customers. The carbon emission trading policy is always better than the carbon emission policy and the carbon tax policy when the allocated carbon emission quotas are greater than the carbon emissions. The carbon emission trading policy is proved to be an effective mechanism which can motivate the supply chain to reduce carbon emissions. Under certain conditions, the supply chain prefers the carbon emission trading policy with higher carbon price to other policies. In the framework of Stackelberg game with the supplier as the leader, for each carbon policy, the paper presents coordination mechanism with the all-unit wholesale quantity discount contract （AWQD）. We analyze and compare the influence of low-carbon policies on channel coordination for the foul＂ low-carbon policies. Numerical experiments are conducted to examine our findings.     

新疆大型蛭石矿床综合成矿模式及找矿指示意义

新疆尉犁且干布拉克蛭石矿床是中国最大、世界上为数不多的超大型蛭石矿床之一.通过与世界同类矿床对比研究发现,尉犁且干布拉克超大型蛭石矿床无论是含矿杂岩体的岩石组合类型,还是形成的矿物系列都与世界同类矿床不尽一致,世界上产有超大型蛭石矿床的杂岩体均发育有典型的过碱性岩类,如霓霞岩、磷霞岩、霞石正长岩类等,但且干布拉克杂岩体不含典型的过碱性岩类,矿床与富碱质超基性岩-碳酸岩有关.本文通过野外和室内研究,对含矿杂岩体的区域地质背景、岩体地质及含矿性特征、岩石化学、微量元素、稀土元素、稳定和放射性同位素进行研究,进而建立该矿床的成岩成矿模式,即地幔交代、裂谷作用、岩浆活动、热液蚀变和表生作用,对进一步在塔里木周边寻找和研究该类矿床具有理论指导与实践价值.     

汉江上游旬阳段古洪水水文学研究

通过对汉江上游流域的广泛考察,在旬阳县高店铺-构元乡河段发现典型的全新世古洪水滞流沉积剖面.在此基础上,采集样品进行粒度成分和磁化率等分析测试.结果表明这些沉积层是古洪水在高水位滞流环境中的沉积物.根据地层学对比分析,确定由其记录的古洪水事件分别发生于全新世早期大约9 500—8 500aB.P.和全新世晚期3 200—2 800aB.P..根据沉积学和水文学原理恢复其洪峰水位,采用比降法模型,计算出古洪水洪峰流量介于43 290～49 130m3/s之间.利用2010年大洪水洪痕恢复计算洪峰流量,对古洪水洪峰流量计算结果进行了验证,结合历史洪水和观测洪水数据,获得了万年尺度洪水洪峰流量与频率关系.