利用高酸值餐饮废油脂制备生物柴油

以高酸值餐饮废油脂为原料,在酯化反应后再经两步酯交换反应制备生物柴油。在酯化反应中添加吸水剂可降低油脂的酸值,经一次酯化反应即可将油脂的酸值降至2m g/g左右,满足酯交换反应的要求。考察了酯化反应中吸水剂的添加方式、种类及其用量对酯化反应的影响,以及酯交换催化剂的种类及用量对脂肪酸甲酯(FAME)收率和产物组成的影响。实验结果表明,以凹凸棒土为吸水剂(用量为餐饮废油脂中游离脂肪酸质量的3%),且在酯化反应30m in时加入,酯化效果较好;以质量比为1∶1的NaOH和KOH混合物为催化剂进行两步酯交换反应时,催化剂的最佳用量依次为1.00%和0.75%(质量分数,基于油脂的质量),FAME收率最高达到96.33%。     

山东省水资源配置思路浅析

山东省总体上属于资源性缺水省份，合理配置水资源已成为解决水资源供需矛盾、保障经济社会可持续发展的关键问题之一。通过对山东省水资源的基本特点进行分析，建立了水资源合理配置系统模型及生成配置方案，在供需平衡分析的基础上，提出了水资源合理配置的基本思路。     

一种基于水下测试用爆炸声源的研究

在对海洋进行考查时,需要了解声波在不同水域的的传播规律,这就要使用水下声源,在近距离的测试中可以用声呐系统,但声呐的传播距离有限,无法进行远距离测试,因此需要一种爆炸声源作为测试的手段,对水下爆炸声源进行了初步的探讨和研究.     

一种改进的共同进化遗传算法及其应用

将共同进化遗传算法应用于临床营养决策优化中,虽然取得了一定成果,但算法中仍存在早熟现象、局部搜索能量弱等问题,为此提出一种改进的共同进化模型。算法使用新的子群体划分方法和交叉算子,引入精英保留策略、信息交换原则和小生境技术。通过对糖尿病营养治疗的仿真表明,改进后的算法在保证群体多样性和避免早熟现象的前提下,提高了算法的局部和全局寻优能力,且膳食配方中营养素达标率符合要求,满足专家建议的糖尿病饮食需求。     

用Flash制作会说话的照片

利用Flash5制作会说话的照片，使照片变成一张张有趣的动画卡片。     

Two-channel constrained least squares problems: solutions using power methods and connections with canonical coordinates

The problem of two-channel constrained least squares (CLS) filtering under various sets of constraints is considered, and a general set of solutions is derived. For each set of constraints, the solution is determined by a coupled (asymmetric) generalized eigenvalue problem. This eigenvalue problem establishes a connection between two-channel CLS filtering and transform methods for resolving channel measurements into canonical or half-canonical coordinates. Based on this connection, a unified framework for reduced-rank Wiener filtering is presented. Then, various representations of reduced-rank Wiener filters in canonical and half-canonical coordinates are introduced. An alternating power method is proposed to recursively compute the canonical coordinate and half-canonical coordinate mappings. A deflation process is introduced to extract the mappings associated with the dominant coordinates. The correctness of the alternating power method is demonstrated on a synthesized data set, and conclusions are drawn.     

汽轮机轴承烧瓦与轴颈的渗巴氏合金现象

简述轴承工作性质，巴氏合金应用与相组成的基本情况。论述汽轮机转子在两个电厂长期运行后，由于轴颈发生的不正常摩擦损伤，在大修改造中由无损检查、机械加工揭示出轴颈存在严重的渗巴氏合金现象，低熔点金属Sn、Sb与Cu向转子材料晶界的深层渗入最终导致了3根大型在投转子的严重开裂与报废。图11表2     

PetroChina Posts All-time High Oil and Gas Production in 2005

PetroChina, China＇s largest oil and gas producer, has set a record high for its 2005 oil and gas output by producing 1.034 billion barrels ofoil equivalent in total, rising by 5.5 percent from a year earlier. The company produced 105.9 million tons of crude oil last year from its domestic assets, accounting for 58 percent of the country＇s total oil output. The company＇s domestic production in 2005 is equal to 842 million barrels, the highest level since the company issued IPO at NYSE and HKSE in 2000. This represented an increase of 12.80 million barrels,     

基于CORBA和多Agent的模具敏捷制造的工作流管理

介绍了CORBA的工作原理，分析了模具敏捷制造的特点，提出了基于CORBA的模具敏捷制造工作流管理模型，并且将多Agent技术应用到该模型之中，使其具有清晰的结构，良好的开放性、集成性和自适应性。