基于分层蓄热水箱的相变球释热实验研究

相变蓄热水箱可有效调节集热器和负载端之间供求不匹配的矛盾,设计了环形布水器进水结构和蓄热水箱,并搭建相变蓄热水箱性能测试平台,对比直进型蓄热水箱和环形布水器蓄热水箱的温度分层,探究孔隙率、进水流速和变温进水等变量下相变蓄热水箱的热分层和相变球的释热性能。实验研究表明：环形布水器能有效抑制进水水流对温度场的扰动,保持良好的温度分层,使相变球逐层放热,增大相变球与传热流体（HTF）的温差,提高释热效率,保证高温水能够源源不断地提供给用户端;孔隙率越小分层效果越好;流速越大分层效果越差,但是释热效率有所提高;变温进水比恒温进水,释热时间延长约40%。     

Advanced vehicles: Costs, energy use, and macroeconomic impacts

Advanced vehicles and alternative fuels could play an important role in reducing oil use and changing the economy structure. We developed the Costs for Advanced Vehicles and Energy (CAVE) model to investigate a vehicle portfolio scenario in California during 2010-2030. Then we employed a computable general equilibrium model to estimate macroeconomic impacts of the advanced vehicle scenario on the economy of California. Results indicate that, due to slow fleet turnover, conventional vehicles are expected to continue to dominate the on-road fleet and gasoline is the major transportation fuel over the next two decades. However, alternative fuels could play an increasingly important role in gasoline displacement. Advanced vehicle costs are expected to decrease dramatically with production volume and technological progress; e.g., incremental costs for fuel cell vehicles and hydrogen could break even with gasoline savings in 2028. Overall, the vehicle portfolio scenario is estimated to have a slightly negative influence on California's economy, because advanced vehicles are very costly and, therefore, the resulting gasoline savings generally cannot offset the high incremental expenditure on vehicles and alternative fuels. Sensitivity analysis shows that an increase in gasoline price or a drop in alternative fuel prices could offset a portion of the negative impact.     

原油储罐保温节能计算

联合站内一次沉降罐通常是不保温的,人们主要是从流体的热力条件去考虑,认为一次沉降罐含水较高,不进行保温对沉降效果及原油的流动也没有多大影响。但是如果从能量损耗的角度考虑,一次沉降罐不进行保温既降低了沉降温度,又浪费了燃料。本文通过对大罐的油罐保温与散热量、热平衡及节能分析,得出了对一次罐进行保温是必要的结论。采用的保温层厚度可为40mm和80mm的岩棉和塑料。在设计时应根据实际情况对大罐保温进行计算与效益分析,以达到节能降耗的目的。     

一个反映重油平均分子结构的特征因数

构造了一个简单的粘重函数KL。考察了不同油品和纯烃的KL值，认为几值对于油品平均分子结构的反映是准确的，随重油的平均相对分子质量增大而降低。对于相对分子质量近似的烃，烷烃KL值＞环烷烃KL值＞芳烃KL值；重油的平均相对分子质量和环化程度越高，KL值越小；普通原油KL值＞重质原油KL值；对于同一种原油，常压馆分KL值＞减压憎分KL值＞原油KL＞常压渣油KL值＞减压渣油KL值；随拔出深度增大，渣油见值减小。     

建筑给排水设计中的一些认识与总结

简要介绍了高层民用建筑消火栓给水系统的常用类型和优缺点。对居住小区 2种加压供水方式进行了分析比较。并论述了给排水设计中值得注意的一些问题。     

南瓜酒的研制

将南瓜打浆并用果胶酶酶解,得到的南瓜浆按40%～60%的比例加入到已发酵24h左右的糯米酒中进行后发酵,在26°C～35°C的温度下发酵2d～4d,经压榨过滤得南瓜酒.南瓜酒颜色浅棕黄,澄清透明,略有南瓜的清香和酒的醇香;口感好,性质稳定,营养丰富.     

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建设地下盐穴的盐矿主要有两种：盐丘和薄盐层。薄盐层中经常含有平面上连续分布的夹层和散布的杂质。这些夹层和杂质主要有石膏、泥页岩、白云石和石灰石。我国江苏金坛盐矿即属于该类含有夹层和杂质的薄盐层，与盐丘相比，含有夹层和杂质的薄盐层以下特点：①不同岩性的夹层造成盐腔剖面上岩性的变化；②盐层几何尺寸横向大，纵向小。文章主要介绍了国外运用解析方法和数值分析的方法确定含有夹层的薄盐层中盐穴储库运行压力的方法，主要认识是：①最大运行压力与盐层和夹层的破裂压力有关；②最小运行压力要保证盖层不发生坍塌，盐腔体积不发生大幅度减小；③周期性变化的运行压力会引起地应力的变化，导致不同岩性层位形变不同，甚至发生整体滑移。     

量子搜索算法对NTRU密码体制的作用

Lattice-based cryptosystems rely on certain lattice problems for their security, such as the shortest vector and the closest vector problems. NTRU is a kind of lattice-based public key cryptosysytem gaining much attention because of its high efficiency. Its encryption and decryption use a mixing system suggested by polynomial algebra combined with a clustering principle based on elementary probability theory. With the availability of quantum computers, the security of cryptosystems based on classical mathematic problems needs to be reevaluated. Since lattice reduction is the main threat to lattice-based cryptosystems, lattice reduction using quantum search algorithms are analyzed to evaluate the security of NTRU in this paper. According to our results, original security parameters proposed for NTRU should be increased in the event that Grover's quantum search algorithm is used for lattice reduction.     

加热炉炉辊及内、外环失效分析报告

本文对包钢薄板厂加热炉炉内部件(炉辊及其附件)进行宏观观测及显微观察，详细分析了其失效形式及原因，并提出相应对策。     

沈阳化工学院综合信息管理系统

沈阳化工学院综合信息管理系统是根据原始模型、采用结构化方法与原型法相结合的技术开发研制的.系统包括90余种报表的数据输入、修改、查询、报表生成、打印及数据备份与恢复的功能.该系统具有很强的容错性和检错功能,友好的用户界面,使用方便,易于扩充,适用于各类高校的年鉴统计,已在汉字操作系统 CC-DOS 2.13E,汉字 DBASE III 软件环境支持下,在 IBM-PC 及其兼容机上实现.