车轴是轨道车辆行走部分的核心元件,是轨道车辆承载重量和安全运行的关键零件.在轨道车辆运行过程中,车轴承受运行颠簸中的交变载荷作用,长时间在大载荷、滑动摩擦条件下工作,车轴表面极易产生疲劳裂纹,导致车轴疲劳失效,提高车轴的表面性能、耐磨性、抗疲劳性能至关重要.针对轨道车辆车轴高表面性能、高抗疲劳强度的要求,开展车轴表面滚压加工工艺技术研究,进行了车轴滚压加工工艺试验,通过分析主轴转速、进给速度、滚压力和吃刀量对滚压车轴表面粗糙度和表面硬度的影响,得到了最优滚压工艺参数,经滚压后的车轴表面由拉应力变为压应力,表面粗糙度和表面硬度都得到显著提升,极大延长了车轴的使用寿命,满足了轨道车辆车轴的使用要求.

以5-氯-2-氨基苯甲酸和甲酰胺为起始原料,经环化、氯化、取代和缩合反应,合成了3个未见文献报道的含哌嗪的喹唑啉衍生物5a～5c.其结构用1 H NMR、13C NMR、ESI-MS及IR测试技术进行了表征.采用MTT法测试了化合物5a ～5c对人胃癌SGC-7901、人口腔表皮样癌KB和人纤维肉瘤HT-1080的体外抗肿瘤活性.结果表明,化合物5a～5c对人胃癌SGC-7901和人纤维肉瘤HT-1080有弱的抑制活性,而对人口腔表皮样癌KB无明显抑制活性.

Four trace elements Ca,Fe,Zn and Cu in preserved eggs were simultaneously determined by ICP-AES.Under the optimizing experimental conditions,RSD is 0.30%-1.30%,the recovery of standard addition is 95.45%-110.28%.The method is simple,fast,accurate and sensitive.

The research approach adopts the analytic approach of the references mainly,and uses the questionnaire and mathematical analysis and expert interview methods to carry on the local evidential research of university students of LiaoNing province.Combining tennis sports culture on campus spiritual and material level and organizational form aspects of research,the results show that material level determines the campus sport culture development level.The growing demand of and physical culture and education from the student and the lagging contradiction from society of college sports capital investment and physical infrastructure construction impact the campus sports culture construction.The research on the development of tennis sport could provide the realistic basis on the campus culture construction.

Three elements K,Mg and Ca in wheaten flour are simultaneously drtermined by ICP-AES with the wetly decomposed sample.Under the excellent condition,the RSD is 0.31%——1.37%,and the recovery rate is 97.20%——100.00%.This method has advantages as simple,fast,accurate and sebsitive.

After digesting samples by wet method,three elements,Cu,Fe and Zn in salted duck eggs are determined simultaneously by ICP-AES.Under the optimal conditions,RSD is 0.16%~0.76%,the recovery of standard addition is 98.37%~106.85%.The method is simple,fast,accurate and intelligent.

The mono-armed CdS nanorods with a few multi-armed nanorods were synthesized through a reaction of CdCl2 with thioacetamide(TAA) under basic conditions at room temperature in the presence of the rod-shaped micellar template of cetyltrimethylammonium bromide (CTAB). The length of the arms can be controlled via adjusting the amount of cyclohexane. To some extent, more cyclohexane results in longer nanorods. The nanorods can be prepared with a diameter of 26 - 48 nm and a length of 240-1 200 nm through this approach. The resulting nanorods were characterized by wide-angle X-ray diffraction (WAXD ) , transmission electron microscopy (TEM) , selected area electron diffraction ( SAED) and X-ray photoelectron spectroscopy( XPS).

Controlling the austenitizing temperature and cooling rate of steel 20Mn2SiVB could get a mixture microstructure containing granular bainite with fine strength and toughness.The result shows that the better mixture microstructure's uniformity could be obtained with the higher heat treatment temperature and faster cooling rate.When the granular bainite dominates the microstructure,the tensile deformation is even,the crack propagation is prevented,and the toughness of the steel is increased.