宣钢近北庄铁矿露采边坡稳定的结构分析

以宣钢近北庄铁矿露采边坡稳定性研究为例，说细说明了岩体结构分析方法的应用。     

清平磷矿客货两用架空索道设计

系统介绍了四川清平磷矿客货两用架空索道工艺系统方案的确定及线路、上下站等主要构成部分的设备配置、方案优化与主要设备的性能、技术参数，还对系统中的安全设施、事故救护作了说明。     

Hydrothermal Synthesis of Acicular Lead Titanate Fine Powders

A pure, acicular lead titanate (PbTiO₃) fine powder with a white color has been prepared by hydrothermal synthesis. It is a new phase of PbTiO₃ with I 4 symmetry, cell parameters of a = 12.358 Å and b = 14.541 Å, and a density of 6.80 g.cm⁻³. The influences of pH (12.5 to 14.4), Pb/Ti ratio (1.0 to 1.6) in the feedstock, reaction temperature (130° to 230°C), time (0.25 to 4 h), starting materials, and additives on the formation of acicular PbTiO₃ under hydrothermal conditions have been investigated. The acicular PbTiO₃ with I 4 symmetry, referred to as the PX phase, can be converted to the perovskite-type (PE phase) of PbTiO₃ at about 605°C while its acicular morphology is essentially unchanged. The preferable conditions for preparing pure acicular PX-phase PbTiO₃ are that the pH is 13.0 to 14.0, Pb/Ti ratio is >1.3, reaction temperature is 170° to 200°C, time is 0.5 to 1.0 h, titanium butoxide (Ti[O(CH₂)₃CH₃]₄) is the starting material, and poly(vinyl alcohol) is an additive. The acicular grain of the PX phase is usually less than 100 nm in diameter and more than 1000 nm in length.     

砼坝裂缝稳定性分析

通过比较线弹性断裂力学中的两种计算应力强度因子的方法，外推法和奇异单元法，得到相应的结论；并以某砼坝下游部位出现裂缝为例，分析在不利荷载作用下裂缝的稳定性。     

叠后地震剖面的线性化波阻抗反演

本文提出了由井旁道出发逐道进行的叠后地震剖面的线性化波阻抗反演方法。每一道反演采用逐次线性化对波阻抗进行修正，反演的纵向分辨率为一个采样时间间隔，并以合成记录道与实际地震道的相似系数作为迭代收敛准则，已处理的地震道波阻抗作为下一道反演初始值。实际资料处理表明，该方法具有较高的分辨率和运算速度快的优点。     

前馈和反馈相结合的控制策略在宝钢线材厂控冷轧线上的应用实践

在详细分析料坯在水箱内冷却热过程特点的基础上，提出了前馈和反馈相结合的水流量优化控制策略，并将该策略应用于宝钢线材厂控冷轧线上。实际运行结果表明：该策略能够合理地控制水箱水流量，从而保证了线材水箱出口处的温度满足工艺要求，大大提高了线材成品的质量。所做工作对国内同类企业有重要的意义。     

Temperature Dependence of Ultra-Low-Frequency Dielectric Relaxation of Barium Titanate Ceramic

Based on a linear voltage ramp method, ultraslow dielectric relaxation of undoped BaTiO₃ ceramic has been carefully measured over the temperature range between − 180° and +120°C. Temperature dependence of the dielectric constant in the frequency range from 10 ⁻⁵ to 10⁻¹ Hz can be obtained using Kramers–Kronig equations. Close to the Curie temperature, the dielectric constant increases so rapidly that the Curie peak is overwhelmed. Two kinds of relaxation processes were observed in this experiment. Ferroelectric domain and mobile charge are proposed to be responsible for the relaxation over the temperature range. With temperature increasing, Maxwell–Wagner relaxation associated with mobile charge gradually dominates. From relaxation time constants at various temperatures, relaxation activation energies about 0.06 and 0.09 eV are identified.     

丁苯胶乳改性道路沥青的推广应用

用丁苯胶乳对胜利１００号沥青进行改性试验．发现随着胶乳掺量的增加．沥青的高温性能、粘结性能改善幅度也大。但综合考虑沥青生产成本等因素．认为：对丁苯胶乳改性胜利１００号道路沥青．掺胶量控制在２％即可满足一般高等级道路工程的需要。文中还介绍了丁苯胶乳沥青近年来的推广使用情况并做了相应的技术经济分析和建议。     

吲哚美辛对荷瘤小鼠抗肿瘤作用机制的实验研究

用微观放射自显影技术及免疫组化法探讨了非甾体类抗炎药吲哚美辛(IN)对Lewis肺癌的生长抑制作用机制。结果显示:与对照组相比,实验组IN的抑瘤率为55.05%;IN可显著下调Bcl-2蛋白的表达(t=6.154,P<0.001),对Bax蛋白的表达没有明显影响(t=2.101,P>0.05)。放射自显影结果显示,在肿瘤细胞的细胞膜、细胞浆及细胞核中均有黑色银颗粒分布,且在用药后12 h时肿瘤组织中的平均银颗粒数高于4、7、243、6 h时。以上结果表明,IN可抑制Lewis肺癌的生长,其机制与下调抗凋亡蛋白Bcl-2的表达及降低Bcl-2/Bax的比值有关;IN可进入到肿瘤细胞内发挥抗肿瘤作用。