用稳态反饱和吸收法测量C_（60）的激发态吸收截面

用准连续激光实现了Ｃ６０的稳态反饱和吸收，通过实验和理论计算的拟合，确定了Ｃ６０的三重第一激发态吸收截面。     

Stored energy analysis of Zn—5Al eutectic alloy in superplastic deformation

The stored energy and the energy release during SPD(superplastic deformation)of a Zn-5Al alloy were studied.The alloy after rolling process gains more stored energy,and the as-rolled speciment can obtain maximum elongation and minimum flow stress without hot loding treatment before SPD.Experimental results show that stroed energy release process is along with SPD process and is also an impetus to SPD.The as -rolled Zn-5Al alloy has 48J/mol stored energy which was measured with DSC(differential scanning calorimeter)and conforms well to the calcuated value.The as-rolled Zn-5Al alloy after SPD with an elongation of 2500% releases 112J/mol stored energy,Analysis shows that the strain rate is in direct ratio to the rate of stred energy release.     

白丰梯级水库实用电力优化调度图的研制——变动目标水位控制法的研究

在分步设计及大量计算的基础上，提出了一套考虑因素相对全面、指导 性强、易于操作的梯级水库电力实用优化调度图。该调度图继承了传统时历法调度图直观、 简明的优点，又具有其特有的优化功能。该方法以汛末蓄满水库为标准，确定典型来水过程 的预调度线和初始目标；以获得梯级电站最大长期调峰收益为目标，以变动目标水位控制为 核心，开发出调度图长系列操作通用程序模块，并以此模块作为寻优计算的手段。提出了水 库长期运行与短期实时调度有机结合，以及模拟计算、水位偏差最优反馈、来水预报、目标 水位寻优等多种实用处理技术。     

黄河水市场的建立与水资源的优化配置

1987年国务院批准了黄河可供水理分配方案，1994年黄河水利委员会又向沿黄省（区）颁发了《取水许可证》。随着流域社会经济的发展，黄河水资源供需矛盾愈加突出。目前黄河水资源管理调度体制还存在政府指令配水严重失控、没有引入激励补偿机制、同比例丰增枯减的原则不利于水资源优化配置等问题。在黄河上建立水市场符合市场经济规律，可以促进节水，提高水资源的利用率，改善生态环境，有利于水资源的高效配置和合理利用。     

新一代银行大型机网络接入技术研究

银行大型机网络接入技术的转型是当前一个非常重要的研究与应用课题。文章在成功实现银行大型机网络接入技术转型的基础上,分析了相关新技术,解决了转型中的关键问题,提出并实现了一种稳定高效的银行大型机网络接入技术方案,对银行大型机网络接入技术的转型具有指导意义,对银行信息化技术研究具有重要参考价值。     

转运站框架式厂房的爆破拆除

合山电厂转运站待拆五层钢筋混凝土框架式厂房西侧与被保护的引风机房相隔仅 0 3m ,北侧与工具房相连 ,南侧与需要保护的油池相邻。爆破切口布置在二层 ,并把最后一排柱的爆破部位提高到引风机房顶部以上 0 5m处 ,避免了后坐对引风机房的影响。通过预处理 ,将厂房与工具房分离。架设防护结构 ,阻挡飞石 ,保护了油池。文中介绍了爆高和爆破参数的选择、预处理、起爆破网路设计和安全防护措施。     

土钉支护结构水平位移安全监控模型研究

国内现行规范、标准是以极限变形值作为土钉支护结构水平位移安全监测报警值 ,但没有反映工程进度影响 ,不便指导工程实践。提出“过程控制”概念 ,以反正切函数为基本形式 ,基于历史经验建立“安全时程曲线”控制模型 ,要求施工过程中实测水平位移始终处在“安全时程曲线”之下 ,以确保最终变形在某一适当的阈值之内 ,已有实测结果可以为施工方案调整提供依据。通过实际案例 ,检验模型的可行性 ,表明过程控制模型较极限变形策略更具可操作性     

Monte Carlo simulations to determine coating uniformity in a Wurster fluidized bed coating process

This paper presents a coating model to predict the mass coating uniformity in a Wurster fluid bed coater using a Monte Carlo method. The velocity and voidage data obtained using imaging techniques on the same Wurster coater are used as inputs to the model. The semi-circular Wurster fluid bed used in this work was 22.9 cm in diameter. A batch of 3.6 kg tablets was used to conduct coating experiments and the coating weight gain distribution results were compared to predictions from the simulation. The model rigorously considers the sheltering effect of particles as they move in the spray zone. Good agreement was obtained when comparing the results with an analytical model.Spray shape and orientation of discretization were found to play an important role in predicting the coating uniformity. A simple spray experiment in a particle-free bed showed that the direction of spray material, in general, was vertically upward. Simulation results confirmed that an upward cylindrical spray model gives better agreement with experimental results compared to a solid cone spray model. Finally, the model was used to predict the changes in coating uniformity with bed operating conditions such as gas velocity and gap height. A wider coating distribution was found for the case with the lower gas velocity and gap height.     

偏高岭土及其对油井水泥性能的影响

综述了偏高岭土特性及其在水泥混凝土领域中的应用情况,初步研究了偏高岭土对油井水泥性能的影响。结果表明,偏高岭土能显著提高油井水泥的抗压强度,表现出很强的火山灰活性,完全可以作为新一代的油井水泥掺合料。     

Training sequence design and channel estimation of OFDM-CDMA broadband wireless access networks with diversity techniques

In this paper, an OFDM-CDMA system employing various diversity schemes is considered for a possible candidate of broadband wireless access networks and broadcasting applications. With an emphasis on a preamble design for multi-channel separation, we address a channel estimation based on the time-domain windowing and its imperfectness in OFDM-based multiple-antenna transmission systems. By properly designing each preamble for multiple antennas to be orthogonal in the time domain, the channel estimation can be applied to the HIPERLAN/2 and IEEE 802.11a standards in the case of more than two transmit antennas. Also, the effect of diversity techniques on the performance of OFDM-CDMA based broadband wireless access networks is investigated and the maximum achievable diversity gain for a two-path Rayleigh fading environment is evaluated. Simulation results show that the OFDM-CDMA system applying a space-time-frequency diversity with a full-rate full diversity code can give the diversity of D=4 and D=8 for both multi-user cases of maximum user and half user capacities, respectively.