SnO2 nanorods grown on graphite as a high-capacity anode material for lithium ion batteries

A novel architecture of SnO₂ nanorods grown on graphite has been synthesized by a simple hydrothermal method for lithium ion battery. The as-prepared products were characterized by XRD, FTIR, N₂ adsorption/desorption, FESEM and TEM. The electrochemical performances of SnO₂/graphite composite were measured by cyclic voltammetry, galvanostatic charge/discharge cycling and electrochemical impedance spectroscopy. The results show that the SnO₂/graphite composite maintains high lithium storage capacity and good cycling stability, indicating its promising potential as a novel anode material for high-performance lithium ion batteries.     

高层建筑中柴油发电机组容量的选择

结合工程实例分析发电机组的负荷计算,对柴油发电机容量的选择进行探讨,分别计算消防负荷与保障性负荷,按其中较大负荷值来确定发电机容量。     

基于地层边界探测的主动型地质导向技术在南海西部复杂油层中的应用

随钻地层边界探测仪PeriScope可以探测距离较远(15 ft)的地层边界及其产状,有效降低复杂油层中水平井地质导向的风险,在主动型地质导向技术中占有重要地位。以中国南海西部浅海油田2个复杂区块为例,具体分析水平井在薄层内钻进以及钻遇微断层和不规则夹层时的轨迹控制过程,阐述边界探测技术在提高复杂油层水平井储层钻遇率和刻画地层特征方面的价值和意义。实例分析表明,随钻地层边界探测技术可以有针对性地降低复杂油层中的地质导向风险,尤其是在水平井钻遇地层突变导致轨迹出层的情况下,远距离边界探测服务可以为前方导向施工提供有建设性的指导,帮助轨迹尽快返回储层,从而提高储层钻遇率。     

低变质程度煤制浆中试试验研究

为研究适合宁东煤制备水煤浆的工艺条件,以水煤浆制备中试装置为基础,通过调整磨机装球比例、添加剂加量试验、可制浆浓度试验、磨机负荷试验,得出了钢球最佳装填量为40%。在此条件下,添加剂加量在0.45%~0.50%,该煤可制取质量分数为62%~63%的煤浆,并能保证较高的磨机生产负荷。     

KINCO总线型触摸屏在电动大巴行业的应用

本文主要介绍KINCO总线型触摸屏在电动大巴电池管理系统中的应用。在这个控制系统中,触摸屏和微控制器通过CAN总线通信并完成电池组相关信息的数据采集。触摸屏监控到的主要参数：系统电压、系统电流、电池容量、电池温度、报警故障等。     

Preparation and properties of composites based on melamine‐formaldehyde foam and nano‐Fe3O4

In this work, a novel melamine‐formaldehyde‐Fe₃O₄ foam was prepared from a mixture containing melamine‐ethanolamine‐formaldehyde resin, melamine‐glycol‐formaldehyde resin and carboxylated Fe₃O₄ nanoparticles by microwave foaming method. The two resins were characterized by ¹³C‐NMR, respectively. The structures of foams, mechanical and fire‐retardant properties were experimentally characterized separately by scanning electron microscopy, universal testing machine, limit oxygen index, thermogravimetry‐differential thermal analysis, and Fourier transform infrared spectra. The effects of the resin viscosity, emulsifier, nucleating agent, curing agent, silicone oil, microwave heating time and blowing agent on the structure of foam were investigated. Results showed that the properties of foam were decided by not only the molecular structure but also structure of foam, and the carboxylated Fe₃O₄ nanoparticles can improve the toughness and flame retardant properties of magnetic foam obviously from both aspects. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 2688–2697, 2013     

鞍钢炼铁降低氮气消耗生产实践

由于氮气洁净,被越来越多的钢铁用户推崇,导致钢铁企业氮气和氧气不平衡,为了保证氮气用户,氧气大量放散,造成巨大浪费。炼铁是氮气消耗大户,如何降低炼铁氮气消耗是公司头等大事。炼铁通过一系列措施,使炼铁氮气消耗明显降低,取得一定的效果。     

退火温度对冷轧Fe-0.4C-10Mn-6Al高强钢组织与力学性能的影响

通过光学显微镜、扫描电镜、电子万能拉伸试验机、X射线衍射以及背散射电子衍射等技术方法研究了退火温度对冷轧态Fe-0.4C-10Mn-6Al高强钢的组织与力学性能的影响。结果表明,试验钢冷轧后的微观组织主要为δ-铁素体、α-铁素体、奥氏体、马氏体与碳化物,退火后的组织主要由δ-铁素体、α-铁素体、奥氏体与碳化物组成,其中奥氏体含量因马氏体逆转变而随着退火温度升高而增加。随着退火温度的升高,屈服强度、抗拉强度均逐渐降低,伸长率逐渐提高。当退火温度达到800 ℃时,试验钢的强塑积达到27.84 GPa·%,有较好的综合力学性能。     

D-InSAR监测开采沉陷的实验研究

基于ERS1/2影像,针对沛城矿二二采区,利用DORIS软件进行了D-InSAR处理,得到该采区的下沉值,并在与实测下沉值进行对比后,得到了实测和D-InSAR监测下沉值之间的差值与距离的关系式,根据该关系式对D-InSAR监测下沉值进行修正,获得了与地面实测相近的地面下沉,从而证明D-InSAR用于开采沉陷监测是可行的。     

乙醇-柴油混合燃料的燃烧特性研究

研究了以正丁醇为助溶剂,不同比例的乙醇柴油混合燃料在不同转速、不同负荷下的燃烧特性.试验结果表明:随着混合燃料中乙醇比例的增加,燃烧滞燃期延长,而且在不同转速、中大负荷工况下,缸内最大爆发压力增大,峰值滞后明显;燃烧放热率呈明显双峰现象,放热率曲线后移,峰值高于柴油,燃烧持续期缩短.在小负荷工况下,缸内压力峰值随着燃料乙醇比例的增加而减小,放热率曲线呈单峰形曲线.在低速小负荷时,大比例乙醇混合燃料燃烧持续期有所延长.