首次消费启动的启示及其政策选择

针对1996年我国经济“软着陆”后难以起飞的问题，政府采取了一系列启动经济的措施。1999年政府首次实施了消费启动，通过投资和消费双启动来启动经济，可以说首次消费启动对经济增长的贡献很大，然而政府在实施消费启动的过程中也暴露出一些问题，通过对这些问题的分析获得某些启示，并提出相应的政策选择。     

长毛对虾饲料的适宜蛋白质含量

比较了5种常用的对虾蛋白质源饲料和长毛对虾的蛋白质和氨基酸组成,测定对虾对这些饲料的消化率。结果表明:长毛对虾对大豆饼粉、花生饼粉、脱脂秘鲁鱼粉、秘鲁鱼粉和小杂鱼粉的消化率均达到82％以上。5种原料中多数氨基酸的含量高于对虾肌肉中相应氨基酸的含量;但lys、Met、Arg、Ile、Leu 和His等6种必需氨基酸远不及虾体中的含量。以不同比例的秘鲁鱼粉、大豆饼粉、玉米粉和麦麸配制成 5种配合饲料,测定其营养成分以及长毛对虾摄食这 5种配合饲料后的生长率,结果表明:以秘鲁鱼粉为主要蛋白源、蛋白质含量40～45％的饲料,可以较好地满足长毛对虾正常生长的需要,其生长率最高。     

新型六杆四面体扭网壳的构形、静力和稳定性能

提出了一种基于投影平面为四边形的六杆四面体单元组成的新型扭网壳(简称六杆四面体扭网壳),研讨了六杆四面体扭网壳结构的构形,它构造简单,节点和杆件数相对较少,网格抽空率高,兼有单层和双层网壳的优点.针对上、下弦节点为半刚接半铰接六杆四面体单块扭网壳作了静力和线性与非线性稳定性分析,结果表明上弦杆全部受压,下弦杆全部受拉,腹杆除周边一、二圈局部杆件受压外大部分也都受拉,各类杆件内力变化幅度很小,有利于杆件截面选配,提高材料的利用效率.结构的整体刚度好,结构的双非线性稳定系数对比于相应特征值屈曲系数降幅很小,用钢指标优越.这类网壳结构在两种网格抽空方式的单块扭网壳、三种形式的四块组合型扭网壳和一种两块组合型扭网壳中有推广应用的前景.     

考虑红利支付的最优消费投资模型研究

研究了金融市场上证券投资的随机模型。证券价格的波动行为用随机微分方程加以刻划。考虑红利支付过程后，探讨了投资商的最优消费与投资的一般特征。并就模型系数为常系数情形导出反馈形式的最优消费与投资公式。     

湘潭钢铁厂炼铁分厂煤粉制备系统阻力损失测试及节能改造

本文对湘潭钢铁厂炼铁分厂煤粉制备系统每个单元与阀门的实际阻力损失值进行了测量,测量结果表明,该系统运行总效率低于30%,本文通过对实际阻损值进行分析研究,提出了用一台风机代替目前两台风机串联运行的技术改造方案,改造后,取得了较好的经济效益。图2,表2,参3。     

淮阴市土地资源承载力研究

从分析土地资源现状利用及发展趋势入手,讨论土地利用结构的调整;采用产潜比数学模型,预测两种投入水平下土地的生产能力和不同生活标准下的土地人口承载量;通过供需平衡,研究协调土地、农业发展、人口和环境关系的对策.     

MIG桨搅拌传热性能的研究

本文研究了层流域MIG桨搅拌的传热性能。实测了搅拌功率。获得了计算四层及七层MIG桨搅拌槽内壁传热膜系数的准数关联式,它们可作为工程设计的依据。并对四层及七层MIG桨性能进行了综合评价。     

The use of microorganisms with broad range substrate utilisation for the ferricyanide-mediated rapid determination of biochemical oxygen demand

The feasibility of replacing oxygen with a synthetic electron acceptor in microbial catabolism was investigated as a rapid method for the determination of biochemical oxygen demand (BOD). Microorganisms known for their broad range organic substrate utilisation were investigated. It was shown that Trichosporon cutaneum, Pseudomonas putida and Bacillus licheniformis could utilize the ferricyanide ion as an alternative electron acceptor, in place of oxygen, for the catabolic oxidation of a range of simple organic compounds. The biochemical reactions were monitored by measuring the amount of microbially produced ferrocyanide using amperometry at a Pt disk microelectrode. Catabolic degradation efficiencies approaching those of the conventional 5-day assay were achieved in 1 h. BOD₅ equivalent values for a range of simple organic solutions were determined for each of the microorganisms. The effect of increased incubation time and the choice of appropriate calibration standards for rapid BOD assays were also considered.     

织编物的组织结构

织编物是把机织与针织的原理相结合所生产出的一种带条纹的织物。为了深入研究织编物的特性、用以指导在设计这一类织编物时所遇到的种种问题,我们有必要对织编物的组织结构进行研究。本文就织编物的厚度与经纬纱的细度,经纬纱的密度与用纱量之间的关系,织编物的几种基本组织结构及其经纬密度的配置,以及经纬向的强力与伸长,纱线复盖度与透光及透气性的问题一一作了研究,虽然这一工作仅仅是开始,但它有助于对这类新型织物的生产研究工作,以供这方面工作的同志参考。     

Recent developments and applications of screen-printed electrodes in environmental assays—A review

Screen-printed electrodes (SPEs), which are used as economical electrochemical substrates, have gone through significant improvements over the past few decades with respect to both their format and their printing materials. Because of their advantageous material properties, such as disposability, simplicity, and rapid responses, SPEs have been successfully utilised for the rapid in situ analysis of environmental pollutants. This critical review describes the basic fabrication principles, the configuration designs of SPEs and the hybrid analytical techniques based on SPEs. We mainly overview the electrochemical applications of SPEs in environmental analysis over the past 3 years, including the determination of organic compounds, heavy metals and gas pollutants.