单片机在绕线机上的应用

本文介绍一种用单片控制的机电一体化绕线机，由单片机实现绕线数圈数，停车控制、产量累计等。文中讨论整机硬件设计的有关问题，给出软件的设计流程。     

氯化钡法用于混合碱的定性及定量分析

本文研究了氯化钡用于混合碱定性分析的可能性以及进行定性定量分析的方法,系统总结了氯化钡法用于混合碱定量分析时各组分含量的计算公式,将本法用于一些混合碱试样的分析获得了较为满意的结果。     

藏山羊皮肤组织学构造的研究

对临产胎儿、1月龄、4月龄、6月龄、周岁和成年6个年龄组藏山羊进行研究结果表明,藏山羊皮肤表皮层厚度到1月龄时便基本达到衡定,真皮层厚度从临产到成年一直增厚,成年达最厚;皮下组织层发育与真皮层有相同的趋势。初级毛囊密度随年龄递增相对减小,次级毛囊密度临产到1月龄显著增大,1月龄后其密度相对减小,1个毛囊群中次级毛囊4月龄前发育迅速,4月龄后其发育基本停止;S/P一直呈递增趋势,6月龄以后基本达到衡定。网状上层中的胶原纤维直径4月龄前明显增加,乳头层中的胶原纤维直径从临产到成年一直明显增粗;弹性纤维直径1月龄前明显增大,1月龄后增大不明显。研究结果为合理适时地利用藏山羊板皮,和提高藏山绒的产量提供科学指导和理论参考。     

关于共正矩阵的特征向量

本文论对共正矩阵的非正特征值所对应的特征向量的特征作一描述,并将它应用于文〔1〕中定理的证明。     

Possible seismic reflector in the lower crust： Evidence from fabrics and experiments of seismic velocity on layered gabbro at high temperature and high pressure

Lattice preferred orientations (LPO) of plagioclase and augite are measured on layered gabbro from the Panxi region, Sichuan Province. The LPO concentration [010] of plagioclase and [100] of augite are perpendicular to the foliation, which indicates a kind of growth fabric associated with crystallizing habits of minerals when the magma is solidifying under the compaction. Calculated seismic velocities based on LPO data of minerals give rise to rather strong anisotropy 5.81% and 5.54% for compressional seismic wave (Vp) and shear seismic wave (Vs), respectively. The experiments at high temperature and high pressure show that the P-wave velocity of layered gabbro is 6.4-6.97 km/s with the maximum Vp anisotropy 5.22% and the Poisson‘s ratio is between 0.28-0.31. According to the comparison of fabrics with seismic velocities of layered gabbro, it is suggested that the large-scale layered intrusive body or the similar layered geological body may exist in the lower crust of this area. Such a layered intrusive body which has strong seismic anisotropy may be the seismic reflector in the lower crust.     

后处理对聚丙烯中空纤维膜性能的影响

采用熔融挤出拉伸法制备了聚丙烯中空纤维膜，详细探讨了中空纤维的机械性能，尤其是各种条件对其弹性恢复性能的影响，研究发现后处理(热处理条件和牵伸比)对膜材料的孔隙率，平均孔径和气体的穿透性能有很大的影响，采用片晶和微纤模型可以很好地解释中空纤维膜的实验现象和成孔机理。     

基于组件的自助售票机的设计与实现

自助服务在我国还是一种新颖的服务方式,实现自助服务的关键在于如何编写自助服务所需要的对部件的控制软件并将其集成为一个完整的自助机系统.以设计和实现基于组件的某机场自助售票机为例,说明自助售票机的实现过程,这种设计流程能对其它自助系统的开发提供有益的参考.     

苏北地区城镇化历程、问题及对策研究

改革开放以来,苏北地区城镇化经历了波动徘徊—缓慢发展—快速发展—稳步发展等主要阶段。当前总体上正进入城镇化中期的快速扩展阶段,但存在城镇化与工业化较大脱节、城镇化质量不高、大城市蔓延和低密度扩散趋势加剧、城乡生态环境亟待改善等突出问题。顺应城镇化发展的新特点及新趋势,应当坚持以科学规划为引领,充分发挥城乡规划在城市建设和区域发展中的龙头作用;坚持以农业产业化为基础、工业化为先导的产业支撑型城镇化发展理念;坚持以基础设施建设为重点,完善城镇功能,增强中心城市辐射带动能力;坚持大中城市和小城镇分工协调、城镇聚合轴和都市圈有机结合的战略布局,优化城镇化发展格局;坚持优先发展特色镇、重点中心镇的“小城镇、大战略”,以科学分类考核推动城镇化科学发展。     

Equilibrium,Kinetics and Thermodynamics of the Adsorption of Methylene Blue onto a Metal-Organic Frameworks Material,Copper Coordination Polymer with Dithiooxamide

The equilibrium, kinetics and thermodynamics of the adsorption of methylene blue （MB） from aqueous solution onto copper coordination polymer with dithiooxamide （H2dtoaCu） , one of the metal-organic frameworks （MOFs）, were investigated in a batch adsorption system as a function of initial pH, adsorbent concentration, contact time, initial dye concentration, and temperature. The Langmnir, Freundlich, and Dubinin- Radushkevich （D-R） isotherm models were used for modeling the adsorption equilibrium. It was found that Langmuir model yielded a much better fit than the Freundlich model under different temperatures. The maximum monolayer adsorption capacities of MB were 192.98, 229.86, and 297.38 mg/g at 298, 308, and 318 K, respectively. The calculated mean adsorption energy （8.26- 11.04 kJ/mol） using D-R model indicated that the adsorption process might take place by chemical adsorption mechanism. Otherwise, the kinetic studies revealed that the adsorption process could be well explained by pseudo-second-order rate kinetics and intraparticle diffusion was not the rate-limiting step. Thermodynamic studies indicated that this system was feasible, spontaneous, and endothermic process. Based on these studies, H2dtoaCu can be considered as a potential adsorbent for the removal of MB from aqueous solution.     

Micromorphology and physicochemical properties of hydrophobic blasting dust in iron mines

The micromorphology and physicochemical properties of hydrophobic blasting dust(HBD)from an iron mine were comprehensively analyzed by laser particle size analysis(LPSA),scanning electron microscopy(SEM),X-ray diffraction(XRD),and X-ray photoelectron spectroscopy(XPS).The results show that the HBD particles can be classified into three types based on their particle size(PS):larger particles(PS>10μm),medium particles(1μm≤PS≤10μm),and nanoparticles(PS<1μm).The cumulative volume of respirable dust(PS≤10μm)was 84.45%.In addition,three shapes of HBD were observed by SEM:prism,flake,and bulk.In particular,the small particles were mostly flaky,with a greater possibility of being inhaled.Furthermore,the body and surface chemical compounds of HBD were determined by XRD and XPS,respectively.Ammonium adipate(C6H16N2O4)was the only organic compound in the body of HBD,but its mass fraction was only 13.4%.However,the content of organic C on the surface of HBD was 85.35%.This study demonstrated that the small-particle size and large amount of organic matter on the surface of HBD are the main reasons for its hydrophobicity,which can provide important guidance for controlling respirable dust in iron mines.