电机铁芯扭槽叠扣冲压控制系统

为高速冲床设计一附加控制系统,以实现在电机铁芯加工中任意扭槽的叠扣冲压,给出了该系统的控制原理图和软件框图.     

采用“两级跳间隙镀”电源的无氰碱铜工艺研究

回顾了对无氰碱铜研究历史中的经验教训。在大量试验基础上，提出了一种706无氰碱铜工艺。对配位剂的恰当选择、组合及工艺条件控制，能将临界活化电流密度降得很小，使钢铁件上能在宽JK范围内直接预镀铜而取得良好结合力。用开发的“冲击镀加间隙镀两级跳自动电源”，更有利于提高结合力及提高抗阴阳离子杂质影响能力。加入适量硝酸钾能降低液温并提高允许JK，有利于无氰加厚镀铜及复杂管件装饰镀。     

Direct ethoxylation of fatty methyl ester over Al-Mg composite oxide catalyst

For the purpose of estimating the reaction mechanism of the direct ethoxylation of a fatty ester in the presence of an Al-Mg composite oxide catalyst, a labeled fatty methyl ester C₁₁H₂₃CO¹⁸OCH₃ containing ¹⁸O isotope was synthesized and directly ethoxylated. The product was evaluated by gas chromatography-mass spectrometry (GC-MS). The GC-MS spectra showed that the ¹⁸O isotope label was present only in the methoxy group at the molecular end of the ethoxylated fatty methyl ester. This supports the reaction mechanism of coordination anionic polymerization where the bond between the acyl and methoxy groups of the fatty methyl ester molecule was broken, caused by the bifunctional effect of the acid-base active sites; an intermediate chemisorption species was formed; and then ethylene oxide was addition-polymerized sequentially, in parallel.     

煤矸石热活化及相变分析

系统研究了不同温度下热处理活化煤矸石的物相组成和活性组分溶出的变化规律.用差热分析、X射线衍射、红外光谱、核磁共振、电感耦合等离子原子发射光谱和扫描电镜等仪器测试分析煤矸石原矿和不同煅烧温度制备的样品的矿物组成、分子结构、29Si和27Al化学位移、活性Si4 和Al3 溶出量及微观结构.结果表明:煤矸石的活化程度随不同温度下矿物相组成及铝配位情况的变化而改变.连续性的相转变与活性硅、铝的溶出量相对应.     

基于两阶段人工鱼群算法的U型渠道断面优化设计

渠道断面优化是控制农田水利工程成本的重要因素,已有的渠道断面优化研究以梯形渠道为主,对U型渠道研究较少。以优化U型渠道深度、圆弧半径和直线段外倾角为目标,建立以U型渠道过水断面面积最小为目标函数、满足设计流量要求的数学优化模型。根据U型渠道水力计算的复杂性,利用引入协调行为的两阶段人工鱼群算法,对渠道断面设计进行优化。优化结果满足边坡稳定等约束条件。将模型应用于连云港市赣榆区黑林镇土地整理项目,10条斗渠过水断面面积均减小,优化后占地面积共减少28.603 m~2,占原占地面积的5.0%。     

5-溴水杨醛Schiff碱及其铜(Ⅱ)配合物的表征和抑菌活性的研究

合成了2种新5溴水杨醛亚胺Schiff碱配体及其与铜(Ⅱ)的2种新配合物,其结构与组成由元素分析和红外光谱所表征。初步抑菌实验表明,这4种化合物对多种菌株有明显的抑菌活性,且比结构改造前的水杨醛亚胺合铜(Ⅱ)配合物具有抗菌谱广、活性高等特点。     

Turbulent flow field comparison and related suitability for fish passage of a standard and a simplified low‐gradient vertical slot fishway

Fishways are hydraulic structures that allow passage of fish across obstructions in rivers. Vertical slot fishways—VSFs—are considered the most efficient and least selective type of technical fishway solutions, especially due to their ability to remain effective even when significant upstream and/or downstream water level fluctuations occur. The scope of the present study is to perform numerical simulations in order to investigate and compare the hydraulic turbulent flow field in a standard and a simplified version of the most common VSF design. Implications in relation to fish swimming behaviour and fish passage performance are discussed. Different water depths (as well as discharges) were investigated, using a bed slope of 5%, as a reference for low‐gradient VSFs with a very limited selectivity that can be used in multispecies rivers in grayling‐barbel regions. Results show that maximum values of velocity, turbulent kinetic energy, and Reynolds stresses are higher in the standard design. However, corresponding to slot geometry and orientation, the direction of the main jet in the simplified design is more inclined towards the left side of the pool. This causes the eddy to split into 2 smaller ones; the minimum eddy dimension is reduced from 0.4–0.5 to 0.2–0.3 m. These dimensions are detrimental for fish passage efficiency, being more comparable with fish length (0.15–0.40 m), thus affecting migrating fish stability and orientation. Furthermore, the standard design provides a more straightforward upstream path and wider areas of low flow velocities and turbulence, useful for fish resting. Therefore, it is recommended that the standard design should be preferred over its simplified version, even if its construction costs are around 10–15% higher than the simplified one.     

内插旋流片的管内流动与换热的数值模拟

通过数值模拟,详细考察了光管内间隔插有旋转角为270.°、旋流角为38.1°旋流片的速度场与热流场的分布特性及其相互间的协同，并对4种旋流片的场协同数进行了比较。结果表明，在同样Reynolds数下，根据场协同数的大小来排列的旋流片类型依次为270-38.1、180-38.1、270-20.3、180-20.3，且与传热性能高低排列是一致的。通过改善速度场与温度梯度场的协同程度是提高换热性能的一个有效手段，且内插旋流片能有效地改善速度场与温度梯度场的协同程度从而提高换热性能。     

过渡金属的液晶基元配合物纳米胶束的自组装

以异烟酸和溴代十二烷为原料合成液晶基元异烟酸十二烷基酯,在水和无水乙醇混合反应体系中,室温下分别与Pd(Ⅱ)、Cu(Ⅱ)和Ni(Ⅱ)过渡金属按4∶1的摩尔比混合反应,通过自组装形成配合物。透射电镜形态观测表明,配合物之间借助超分子力和配体的液晶性协同作用构建成25～40nm左右的棒状形态的纳米胶束。并利用红外光谱,紫外可见吸收光谱,荧光光谱等手段对其结构和性质进行了表征。     

精细化工发展的策略研究

作者对精细化工发展的策略提出如下意见：①将项目为核心改成以技术为核心；②培植企业和部门的技术力量；③搞好行业内部、行业之间、企业内部的协调；④产品方案向横向、纵向延伸；⑤采取多种技术引进方式。