辊底式热处理炉的改造

原江西新钢钢管有限责任公司的2座辊底式热处理炉,由于是采用人工手动调节煤气流量来控制温度,由此导致钢管热处理质量不稳定,加之冷料入炉,加热时间长、出炉烟气温度高,需进行改造。通过对炉型结构、燃烧系统及炉温控制系统3个方面的改造,达到了提高炉子产量、产品质量及节能降耗的效果。     

32和63通径二通插装阀混合集成控制新型差动回路

本文结合拉床实例介绍一种二通插装集成控制式最新差动回路的结构特点及控制原理。     

Mn含量对Mg2Ni型合金相形成及放电性能的影响

采用按比例混合合金粉末压制成圆柱试样，然后用低温烧结和随后机械球磨的方法制备了非晶态的Mg2Ni型合金。研究了烧结和球磨对不同Mn含量的Mg2Ni型合金的相形成过程及电化学性能的影响。实验表明：在Mg2Ni中采用第三组元Mn对Mg进行适量的替代后，通过烧结及球磨方法可以获得均匀的非晶相；微量替代可有效地提高其放电容量：随替代量的增加，合金最大放电容量和高速放电能力降低，而充放电循环稳定性提高。     

钢轨内残余应力的产生及其危害

从钢轨的生产工艺和使用情况人手，分析了钢轨内部残余应力的产生原因、分布状态。结果表明：钢轨在生产和使用过程中均可以产生残余应力；钢轨内部存在大且不合理的残余应力(轨头、轨底拉应力，轨腰压应力)，将会影响钢轨的使用和落锤性能，严重时会造成线路钢轨的突发性断裂或落锤试验不合格。     

飞机货舱门密封橡胶条断裂失效研究

运用宏观检查、微观分析及断口分析、痕迹分析等分析技术和手段,并结合与拉伸断口的对比分析;对造成飞机货舱门密封胶条断裂脱出的失效性质、原因和机理进行了研究.结果表明飞机货舱门密封胶条的断裂性质为疲劳断裂;因舱门关闭时前下角处卡滞有货物紧固带,使舱门下部存在间隙,在飞行中舱内、外压力差值作用和气流影响下,密封胶条受到了沿长度方向的、交变的非正常拉伸应力作用,是导致胶条疲劳断裂、脱出机外的根本原因.     

高效液相色谱法测定焦性没食子酸

在大量焦性没食子酸（９９％）存在下，采用甲醇－二甲基甲酰胺－磷酸－水为流动相和Ｍｉｃｒｏｓｏｒｂ—ＭＶＴＭＣ１８色谱柱，能很好地将没食子酸以及其它酚类杂质与其分离。该方法测定焦性没食子酸简便、准确，已应用于工业生产。     

水利工程施工应急能力G1-灰色评价方法研究

为有效加强水利工程应急能力建设,采用G1-灰色综合评价法对水利工程应急能力进行了综合评价研究。在水利工程施工特点和应急管理研究基础上,建立应急能力评价指标体系。通过采用G1法分析各应急能力评价指标相互关系,确定了指标权重。引入灰色理论将样本信息处理成灰色评价矩阵,并结合指标权重进行单值化处理得到应急能力综合评价值和评价等级。研究结果表明,搜救抢险能力、应急资源调配能力和应急决策指挥能力对于水利工程应急能力建设起到最主要的作用。该评价方法不仅可揭示指标重要程度关系,还能有效量化和评价水利工程项目综合应急水平,具有较好的实用性。     

原油蒸馏塔的模拟计算

在深入研究石油馏分虚拟组分切割方法的基础上，按照原油常压蒸馏塔的工艺原理，提出了联合使用BP法和SR法，以功能模块组合的流程模拟法求解原油常压蒸馏塔的新途径。它具有收敛性好、计算精度高等特点，为进一步实现原油常压蒸馏塔的优化和炼油厂全流程的模拟与优化奠定了基础。     

Synthesis and Characterization of Highly Dispersed Antimony-Doped Stannic Hydroxide Nanoparticles: Effects of the Azeotropic Solvents to Remove Water on the Properties and Microstructures of the Nanoparticles

Highly dispersed antimony (Sb)-doped stannic hydroxide nanoparticles have been successfully prepared using the solution chemistry method. The properties and microstructures of the nanoparticles are investigated in detail by means of infrared, transmission electron microscope, X-ray diffractometer, and Brunauer-Emmett-Teller nitrogen surface area measurements. The results indicate that the properties and microstructures of the nanoparticles strongly depend on the azeotropic solvents used to remove water at the drying stage. Various azeotropic solvents are screened to investigate their effects on the size and dispersivity of dried Sb-doped stannic hydroxide. Three empirical rules are drawn for selecting an effective azeotropic solvent: (1) the solvent molecule should contain at least one atom such as oxygen as the hydrogen (H)-bond acceptor to form H bonds with the surface –OH (acting as an H-bond donor) of polymer particle; (2) the H-bond acceptor should locate in the middle of the alkane chain rather than on the terminal so that the alkane chain can stretch out and cover more surface area, improving the dispersivity of the dried product; and (3) the solvent should have a higher boiling point (∼140°C) to reduce the time of azeotropic distillation for removing water and maintain a lower residual amount of azeotropic agent. Based on the empirical rules, it is discovered that iso-amyl acetate is the most effective azeotropic solvent.     

Crystallization and dissolution behavior of l(+) calcium and zinc lactate in ethanol-water solvent

Crystallization and dissolution behavior of L(+) calcium and zinc lactate in 50% ethanol-water solution was studied. The effects of stirring, standing, ultrasonic wave, and temperature on the crystallization of L(+) calcium and zinc lactate were evaluated. It was found that standing had a positive effect on crystallization of L(+) calcium and zinc lactate, while stirring promoted dissolution of crystallized particles and resulted in high residual concentration in mother liquor. The application of ultrasonic wave did not influence much on crystallization process. L(+) calcium and zinc lactate crystallized easily at 5 ‡C; however, complete crystallization took more than 72 hours. These two salts dissolved rapidly and reached equilibrium within 1 hour.