谈图书馆馆长角色、素质与能力

图书馆馆长是图书馆管理、决策和指挥，对提高图书馆工作质量和图书馆事业的发展起着极其重要的作用。作为一个称职的馆长，不仅要进入角色，具备良好的素质，还要在规划决策能力、组织能力、激励能力、鼓舞能力、表现能力上狠下功能。在当前社会主义市场经济条件下，要使图书馆适应时代的要求，朝着社会信息化方向发展，作为图书馆馆长角色，必须具备一定的素质和能力。     

Reliability Allocation and Optimization of Engine System by Using Genetic Algorithm and Monte Carlo Method

A new reliability allocation model has been built for engine system, which is a repairable system, and consists of a large number of mechanical components. The cost and reliability are taken as objective function and constraint condition respectively. The parameters of components lifetime distribution are given as decision variables, and the component lifetimes are assumed to follow that Weibull distribution. The allocation is separated into two steps to reduce calculated amount of one allocation. Genetic algorithm and Monte Carlo method are applied to solve distribution parameters and system cost separately.     

基于51PLC单片机的智能供水控制器的设计与实现

本文介绍了自行研制的基于51PLC单片机实现的智能控制器,详细论述料其软、硬件的实际,该控制器已经在实际中得到应用.     

智能化流量测量相关仪

相关流量测量法是解决两相流测量等困难流量测量的有力手段，本文采用了新的高速极性相关算法，实现了以该算法为基础的智能化八通道流量巡回检测用相关仪。实验及现场使用证明，该相关仪具有良好的实时性。它与电容传感器配合，可以测量气／固两相流的流量。     

未反应芯收缩模型用于煤焦与CO2加压气化反应的研究

用ＰＢＢＲ装置在８００－９５０℃和０．２９－２．４７ＭＰａ条件下进行了三种煤焦与ＣＯ２的气化反应。实验结果较好地拟合化学反应控制阶段的未反应芯收缩模型。并由此计算得到了反应化学能，指前因子和反应级数等动力学参数。     

煤的催化气化

1.绪言本世纪初就知道利用催化剂来促进煤的气化反应,以后研究一直在进行。对煤或半焦、焦炭的气化,从20年代到30年代间Cobb、Dent一派对以Na~2CO_3为主的催化剂的效果进行了精心研究,并在50气压下的氢气中进行了连续操作。但是此后研究中断了。大约在70年代又重新开始这方面的研究。在50年代虽然煤气化的研究盛行,可那时的研究开发方向以制氢为主,当时使用的是涡流型反应器,高温下     

丁香精油对果蔬采后病原菌抑制效应研究

从香辛料中提取出的精油具有良好的抑菌能力，在果蔬天然防腐保鲜剂的开发应用研究中具有重要前景。以丁香为原料，比较了超临界CO2萃取、水蒸汽蒸馏、直接加热水蒸馏所得丁香精油对果蔬采后主要病原菌的抑制效果。结果表明丁香精油对葡萄、冬枣、桃、蒜蓬等果蔬采后主要病原菌具有良好的抑制效果，600mg／L的丁香精油能够完全抑制葡萄灰霉菌、链格孢、冬枣青霉的生长，500mg／L的丁香超临界提取精油对桃灰霉、蒜薹葱鳞灰葡萄孢抑菌率分别为79．3％、85．7％。在二种不同的提取方法中，水蒸汽蒸馏的精油抑菌效果最好，超临界CO2萃取次之，直接加热水蒸馏稍筹。     

脲甲醛压塑粉干燥过程的Yong分析

本文采用Yong分析方法评价了用带式干燥机干燥脲甲醛压塑粉的内部与外部Yong损失；特别揭示了由不可逆熵变造成的内部能量损失；并为改进该过程的工艺条件达到节能目的提供了方向。     

大孔吸附树脂精制鱼腥草黄酮类化合物

Flavonoids are one main kind of effective components in Houttuynia cordata Thunb., which display a wide range of pharmacological activity. In this study supercritical fluid extraction （SFE） with carbon dioxide was first used as preparat ion step to remove the volatile components, which are also active components, from Hout-tuynia cordata Thunb. Then ultrasound-assisted extraction was used to obtain the crude flavonoids and the macro-porous resin adsorption technology was further employed to purify the flavonoids. Nine kinds of macroporous resins with different properties were tested through static adsorption, and one macroporous resin labeled as D101 was selected. The effect of several factors, such as the ratio of column height to diameter, initial concentration and pH, on both flavonoids yield and content were explored by dynamic adsorption to obtain reasonable conditions of adsorption and desorption. The experimental results show that the content of fiavonoids can be above 60% with fia- vonoids recovery of 93.3 % under the optimum conditions of purification. HPLC analysis of the final flavonoids product shows it contains quercitrin, hypefin, rutin and quercetin.     

惰性气体对分子蒸馏过程的影响

本文采用基于Bohzmann方程的Bhatnagar—Gross—Krook模型方程，建立了计算多组分稀薄气体流动的数学模型和求解方法。应用该模型对一维蒸发和冷凝问题进行了数值模拟，考察了惰性气体存在对该过程的影响，着重讨论了蒸发温度、冷凝温度、惰性气体分压以及蒸发面和冷凝面之间的距离等因素对分离因数的影响。