高等数学教学中新概念的引进

就梯度概念，微分概念的引进展开讨论，旨在说明高等数学中引进新概念的优越性和必要性，从而使学生能更深划地理解高等数学的概念与说明，提高学生的学习兴趣。     

逆变式铸件孔眼焊补机的研制

采用新型功率器件绝缘门极双极型晶体管 (IGBT) ,结合PWM控制技术 ,研制用于铸件孔眼焊补的逆变式电弧螺柱焊焊机。解决当前铸件孔眼焊补存在的材质差异大、易出现白口组织、易开裂脱落、焊接热影响区性能下降等问题 ,进而 ,挽救大量铸造孔眼缺陷造成的废品 ,提高铸造生产率     

A new PAA Sol-gel method to synthesis the spinel LiMn<Subscript>2</Subscript>O<Subscript>4</Subscript> Material for Li-ion battery

A PAA sol-gel method, which is based on the chelate effect of PAA polymer, was developed for the synthesis of the spinel LiMn₂O₄ material. The pyrolysis process of the PAA-nitrate mixture precursor was investigated by TG and DTA analysis. It is found that the structure and electrochemical properties of the material are sensitive to the atmosphere employed in the synthesis process. Preliminary results show that the material thus prepared has a good electrochemical performance even at high charge and discharge current. Foundation item: Supported by the National Science Foundation of China (No. 29833090) Biography: Zhan Hui (1973-), female, Ph.D. research direction relectrochemistry.     

COMPARISON OF ECF-LIGHT,TCF AND CEH BLEACHING OF NON-NOOD FIBERS

A comparative evaluation of DQP, OQP and CEH bleaching of non-wood fibres has revealed that wheat straw, reed, bagasse and bamboo pulps can be bleached to brightness levels of just above 80% ISO,when applying an OQP bleaching sequence and to brightness levels of about 85% ISO when applying the DQP sequence using 10 - 15 kg/tp of ClO2 (aC1.),15 - 20 kg/tp of H2O2 together with 1 - 2 kg/tp of EDTA. The P.C. numbers of the DQP and OQP bleached pulps are much lower and the viscosity much higher than those of the CEH bleached pulps.Compared with CEH pulps, both the DQP and OQP pulps had better strength properties, particularly Tear Index. In spite of their higher final brightness levels,the DQP pulps show similar or better strength properties than the OQP pulps. A comparison of the CEH and DQP effluents showed that the DQP bleaching could reduce the pollution load (CODCDBOD5, SS) by 35 to 60% without the need for recirculation of any effluent streams. The AOX levels could be reduced by 87 to 93%.     

涡圈高度和节距对涡旋压缩机排气孔面积的影响

研究了排气孔面积对涡旋压缩机性能和效率的影响，详细推导了排气孔理论开设区域的边界曲线方程．发现了涡圈高度和节距等参数对排气孔面积影响的规律性，并且对圆弧形和腰形2种排气孔作了对比分析．结果表明，随着涡圈高度或节距的增大，排气孔面积减小，而且节距的影响更为剧烈；对于不同的基本参数，圆弧形排气孔的面积曲线始终优于腰形排气孔的面积曲线，且节距和高度越小，改善作用越明显．这在涡旋压缩机设计时为涡圈高度和节距的选取提供了理论依据．     

高阶导数应用研究

极值点和拐点是高阶导数应用中两个常见的概念。文章通过对同济版《高等数学》一道课后习题的讨论 ,给出导数阶数、极值点和拐点的关系 ,并将该问题进行推广 ,使其具有定理的职能。     

薄层色谱法分离测定青霉素V亚砜酸

建立了测定青霉素V亚砜酸含量的薄层色谱扫描方法，以V（醋酸丁酯）：V（冰醋酸）：V（5％磷酸氢二钠）：V（正丁醇）＝12：4：2：1为展开剂，检测波长285nm,线性范围5－60mg，最低检测限0.5mg。方法简便、快速、灵敏、重现性好、可用于青霉素V亚砜酸生产的质量控制。     

《船舶动力装置》专业毕业设计改革探索

在全球海洋运输业和船舶制造工业迅猛发展的时期,为满足社会需求,我们对轮机工程专业的船舶动力装置专业方向的毕业设计进行了教学改革,使我校该专业的毕业生提高了社会适应能力和就业的竞争力。     

多媒体教学软件的超媒体空结构

在讨论多媒体教学中信息转化为知识的教学认知过程的基础上，提出具有普遍指导意义的单机和网络多媒体教学软件空结构，介绍了空结构的功能和实现方案，以及空结构的使用方法。利用空结构思想指导多媒体教学软件的设计具有简便、快速、高效的特点。     

L^p（Ω,H）型空间上的单位球面等距扩张问题

讨论了Lp（Ω，H）（1＜p＜∞）的一类子空间上的单位球面等距扩张问题，其中H是Hilbert空间．