基于ARM的N＋1自动切换控制系统的设计

设计了一种基于嵌入式ARM微控制器的N＋1自动切换控制系统,将高速CAN通信应用到N＋1自动切换控制系统中,减少各控制器之间交换信息的时间．利用嵌入式技术,降低了系统的成本;利用专门配备的测控模块,提高了系统的可靠性．该系统可以实现一台备机为多台主机备份以及主备发射机自动切换．     

煤矸石混合料路面基层施工工艺研究

为探索煤矸石混合料这一新型材料作为路面基层填料的施工工艺,以邢台某矿公路工程为依托,在分析研究煤矸石混合料自身特点的基础上,制定“J3Z4N2法”铺筑试验路段并应用于整条道路,分析研究煤矸石混合料路面基层关键施工工艺和注意事项,通过现场对控制指标的检测,证明“J3Z4N2法”铺筑整条道路各项指标均能达到规范标准。     

天冬氨酸及其席夫碱的缓蚀性能研究

采用交流阻抗、极化曲线方法系统地研究天冬氨酸及其席夫碱两种缓蚀剂在0.1 mol/L硫酸介质中对N80低碳钢的缓蚀性能.研究结果表明：随着缓蚀剂浓度的增加,缓蚀效率也增加.天冬氨酸的缓蚀效率为70.78％,天冬氨酸席夫碱的缓蚀效率为79.71％,这说明天冬氨酸席夫碱的缓蚀性能优于天冬氨酸.用动力学方程对这两种缓蚀剂的吸附方式进行拟合,得到良好的线性关系,表明这两种缓蚀剂对N80低碳钢表面的吸附与朗缪尔吸附等温式一致.     

CrAIN／TiAIN纳米多层膜的微结构及其性能研究

采用磁控反应溅射法制备了不同调制周期的CrAIN／TiAIN纳米多层膜,并通过x射线衍射仪、显微硬度计、扫描电镜分析了调制周期对多层膜的微结构、力学性能和高温抗氧化性能的影响。结果表明：CrAIN／TiAIN纳米多层膜共格外延生长,呈现CrAIN（或TiAIN）面心立方结构,且呈（111）择优取向;CrAIN／TiAIN纳米多层膜在某些调制周期出现硬度异常升高的超硬度效应;CrAIN／TiAIN纳米多层膜比CrAIN,TiAIN单层膜具有更好的高温稳定性,高温时仍具有较高的硬度。     

3-二乙胺基-7-叔丁基荧烷的合成

以N,N-二乙胺基苯酚和邻苯二甲酸酐为原料合成2-羧基-4′-二乙胺基-2′-羧基二苯甲酮,然后再与对叔丁基苯酚反应生成3-二乙胺基-7-叔丁基荧烷,通过核磁共振、红外光谱对产物进行了表征,测定了其荧光光谱。结果表明在λex=521nm处激发出现最大荧光发射波长,λem=572nm。     

KJ70N安全监控系统在淮南市小煤矿安全生产中的应用

结合KJ70N的系统组成和主要功能,介绍了该系统在淮南市小煤矿中的应用,并结合淮南市建立的三级煤矿安全监控体系,共同保障淮南市小煤矿的安全生产.     

一种基于80C196KC和L298N的直流电机PWM控制技术

阐述了基于80C196KC和L298N的直流电机PWM控制系统的设计,给出了PWM调速系统的工作原理,结合具体硬件电路介绍了L298N驱动直流电机的实现方法及抗干扰措施,并给出了引入分段PI控制的软件实现方法。实践证明,系统工作稳定可靠,达到设定效果。     

Evidence of the vital role of the pore network on various catalytic conversions of N2O over Fe-silicalite and Fe-SBA-15 with the same iron constitution

Fe-silicalite and Fe-SBA-15 with similar iron content have been characterized by N₂ adsorption, small angle X-ray scattering (SAXS), wide-angle X-ray scattering (WAXS), scanning electron microscopy (SEM), high-resolution transmission electron micrographs (HRTEM), UV–vis–DRS and EPR, and tested in direct N₂O decomposition, N₂O reduction by CO and N₂O-mediated propane oxidative dehydrogenation. Both catalysts contain almost exclusively isolated Fe³⁺ sites of similar concentration and structure, which are, however, stabilized in markedly different pore geometries (intersecting channels of ca. 0.55 nm diameter in Fe-silicalite versus parallel linear pores of ca. 7.5 nm diameter in Fe-SBA-15). This aspect is of vital importance in order to exclusively ascribe different catalytic performances to the environment where the iron species are stabilized. Fe-silicalite revealed to be much more active than Fe-SBA-15 in all reactions studied. This clearly illustrates that the confinement of the iron species in pores of suitable geometry (structure and size) is essential to originate their remarkable catalytic properties. The large pores in ordered mesoporous materials apparently do not generate the required intimate contact between potentially active Fe sites and reactant molecules.     

Effects of Ti addition on low carbon hot strips produced by CSP process

Large quantity of fine Ti（C,N） particles, 15-30 nm in size, were observed in low carbon hot strips added to a small amount of Ti and produced by CSP process. The results showed that the precipitation of Ti（C,N） mostly took place during soaking and hot rolling, which is significantly different from that in the conventional production. These fine Ti carbonitride particles could be very effective on the austenite grain refinement by hindering grain growth of recrystallized austenite. Their precipitation behavior was discussed and compared with that of the steels produced in the conventional production.