增强燃烧室内空气紊流降低柴油机油耗,噪声及有害排放物的研究

柴油机燃烧室中空气紊流运动对促进燃烧有重要作用。为改善Ｘ４１０５Ｂ柴油机性能，作采用了高紊流的“Ｑｕａｄｒａｍ”型燃烧室。通过合理选择进气涡流强度、供油速率和供油提前角，取得了良好的效果。不仅改善了燃油经济性，减小了烟度，而且降低了其排放物和噪声。     

三峡永久船闸高边坡监测成果及稳定性分析

为保证三峡永久船闸高边坡施工期和运行期的安全，布置了比较齐全的监测项目和监测设施。监测资料分析表明，边坡整体稳定性良好。局部块体失稳是边坡的主要破坏形式，采取适当的加固处理措施后可保证其稳定性。二闸室至三闸首中隔墩顶部产生并一度发展的裂缝，随着闸槽开挖结束而呈明显的收敛趋势。边坡岩体时效变形量值不大，持续时间不长，预计不会影响船闸人字门的正常运行     

尾矿坝浸润线降深自流排渗技术及应用

针对上游法筑坝坝体浸润线高，危害大、降深难的问题，采用水平孔－竖直袋状砂井联合自流排渗新技术进行排渗。该方法不仅排渗水量大、浸润线降低幅度大、不需动力和维护、而且施工简单快捷，投资费用低，适用于各类尾矿坝浸润线的降深。     

Mathematical models of current losses in bipolar cells

A thorough study of current losses in bipolar cells has been made for the development of the great energy-saving potential of bipolar cells. A proper equivalent circuit for bipolar cells has been proposed, and mathematical methods for computing current losses for all types of polar-ization have been developed. For linear polarization, the current losses can be computed by solving either a tridiagonal matrix or a second-order ordinary differential equation. These values can be used to evaluate the minimum current losses at given conditions. For other kinds of polarization, the current losses can be computed by similar methods if the necessary experiments of measuring the cell voltages of each electrolytic compartment have been made. These values can be used to design practical bipolar cells. Extensive experiments have been made to evaluate the effects of electrode polarization, electromotive force (emf) of the galvanic cell for the for-mation of electrolyzed substance, gaseous products, geometric dimensions of electrolytic cells, specific resistance of electrolyte used, and the total and ordinal number of electrolytic com-partments on current losses. This was the first time such systematic experimental research had been undertaken. Experiments showed that theoretical models were in good agreement with measured data and that DC energy consumption of 0.45 kwh/kg Pb for lead electrolysis from molten chlorides could be achieved in a cell with seven bipolar electrodes. GUANGWEN ZHAO, Visiting Professor, Department of Materials Science and Metallurgy, University of Cambridge, Cambridge, United Kingdom     

杭钢8 m2竖炉高利用系数生产实践

杭钢炼铁厂8 m2竖炉2005年生产酸性球团矿522 114 t,利用系数7.913t/(m2·h).本文介绍了杭钢在提高工艺装备水平、改进工艺制度、优化工艺参数、完善管理等方面所做的工作.     

流动文脉库哈斯的CCTV新总部大楼方案解读

以OMA在北京的CCTV中标方案为切入点，追溯库哈斯在城市及建筑设计背后的理论根源。通过解读库哈斯的创作，进一步思考如何在“切进”和“诠释”作品的过程中发现其存在方式可能产生的潜力和机会。     

A novel 3D network coordination polymer consisting of paddlewheel Co3 clusters connected by PO4 and 4-pyridinecarboxylate

The synthesis, structural characterization and preliminary magnetic studies of a novel coordination polymer with paddlewheel Co₃ clusters are reported firstly. In the polymer, Co₃ clusters are covalently linked through PO₄ tetrahedra and 4-pyridinecarboxylate (4-pya) ligands into interpenetrated three-dimensional network.     

再生钻杆摩擦焊接头断口形貌与断裂应变的研究

通过对再生钻杆摩擦焊接头断口形貌的电子金相分析,指出了正常断口和异常断口的客观特征。并采用统计平均法测定了两种断口形貌断裂表面上夹杂物的有效体积分数,从断裂应变的角度深入分析了异常断口断裂面上大量外来夹杂物对接头塑性和韧性的影响。     

PL2101电力线载波芯片I2C通信的实现

简要地介绍了电力线载波芯片PL2101、I^2C串行通信的基本原理以及两之间通信与程序的实现。     

注射成形钕铁硼粘结磁体研究的现状及前景

论述了注射成形钕铁硼粘结磁体的特点及发展趋势，分析了其生产工艺中的四个关键因素。包括磁粉，粘结剂与耦联剂，注射过程，充磁过程，并对这四个关键因素的研究状况作了综合评述，认为今后对注射成形钕铁硼粘结磁体的研究开发将集中在四个主要的方面。