A spectral model based on atmospheric self-memorization principle

Based on the atmospheric self-memorization principle, a complex memory function was introduced and the spectral form of atmospheric self-memorial equation was derived. Setting up and solving the equation constitute a new approach of the numerical weather prediction. Using the spectral model T42L9 as a dynamic kernel, a global self-memorial T42 model (SMT42) was established, with which twelve cases of 30-d integration experiments were carried out. Compared with the T42L9, the SMT42 is much better in 500 hPa forecast not only for daily circulation but also for monthly mean circulation. The anomaly correlation coefficient (ACC) of forecast for monthly mean circulation has been improved to 0.42, increased by 0.05, and the root-mean-square error (RMSE) has been reduced from 6.09 to 4.03 dagpm.     

Comparison between varietal purity and zymogram purity in maize

The zymogram purity of 5 inbred lines, 7 single cross hybrids and 7 single cross hybrids mixed with their parental lines was examined by a vertical discontinous polyacrylamide gel electrophoresis. Results indicate that the maize hybrid impurity is mainly composed of three parts:mixed with the seeds from parents or other source, contaminated with the seeds resulting from unknown pollination and variable in genetic background. It was found that the varietal purity is higher than the zymogram purity and they showed a linear relationship. The regression mefficient (γ) between varietal purity and zymogram purity is 0.898 2. There is an average of 3.5 % variable in the field. However, using a known rate of the mixed seeds, their regression mefficient is 0.999 9. It was also found that the examinational mix rate is 0.33% higher than the known mix rate. The seedling rate of the single cross hybrids is 85.71 %, but that of hybrids mixed with their parental lines is only 77%. Therefore, it is reasonable to claim that zymogram purity is lower than the varietal purity.     

邻苯二甲酸二丁酯的简便合成方法

在亚硫酰氯存在下,邻苯二甲酸与丁醇反应,高产率生成邻苯二甲酸二丁酯．与经典方法相比,该法具有操作简便,反应时间短,产率高等优点．     

蔗糖酯的合成及应用

介绍了蔗糖酯的各种合成方法及其应用情况，针对这些合成方法进行了评价．目的在于促进我国对蔗糖酯合成方法的研究及生产，在众多领域扩大它们的应用范围．     

对氨基苯甲酸乙酯与苯乙酮和芳香醛的Mannich反应

报道了对氨基苯甲酸乙酯与苯乙酮和芳香醛的Ｍａｎｎｉｃｈ反应．在少量浓盐酸催化下，上述反应物在无水乙醇中于９～２１℃可以发生Ｍａｎｎｉｃｈ反应，直接生成９个新的Ｍａｎｎｉｃｈ碱，１－苯基－３－芳基－３－（４－乙氧羰基苯胺基）丙酮，产率５２％～９９％．产物的结构均经元素分析、ＩＲ和ＭＳ鉴定．还讨论了Ｍａｎｎｉｃｈ碱的生成条件     

价值工程在挖泥船泥浆泵改造中的应用

泥浆泵是挖泥船的主要设备之一．其泵壳、叶轮和衬板由于磨损寿命较短．本文通过功能和成本分析，改进了设计，并且进行了试验，取得了显著的经济效益．     

垂直管内汽－液两相间传质及界面对冷凝过程的影响

本文根据冷凝的控制方程和相应的边界条件，得到了传质及界面对冷凝过程影响的解析解，并对影响冷凝过程的机制和主要因素，如表征蒸汽及界面速度的因子Ｂ、表征由传质引起动量传递的因子φ以及反映传质及界面综合作用的因子ω分别进行了讨论．结果表明，传质及界面对冷凝过程有明显的影响，本文解与努塞尔解有显著差别．     

具有重特征值的弱阻尼系统的摄动法

利用约束广义逆方法，导出弱阻尼系统摄动法，该方法可处理原系统有重频时的一般情况，并且只需待摄退化模态信息，它是Ｋｗａｋ近期工作的改进和推广。     

等导重特征值的阻尼摄动

推导了原结构有等同一阶段导数的重特征值的小阻尼摄动法，这是约束广义逆算法在弱阻尼振系中的推广。     

用位形空间中的直接摄动法求解弱阻尼陀螺特征值问题

提出一种位形空间中的直接摄动法求解弱阻尼陀螺特征值问题，所提出的方法被摄模态有重循征值。