论行政资源功能与持续性的实现

行政资源是行政系统生存、发展的基础。本文着重研究行政资源的功能和持续性的实现。文章分析了行政资源的三个功能，并从结构性、现实性两个角度分析行政资源持续性的实

过敏性鼻炎的中医辨证论治

针对近年有关过敏性鼻炎的文献和资料进行分析和总结,探讨中医如何治疗过敏性鼻炎。在中医辨证论治方面,病因病机为肺脾肾气虚、阳虚,治法以温阳、益气为主

早期糖尿病视网膜病变中eEF2K活性变化的实验观察

目的观察早期糖尿病大鼠视网膜中真核生物延伸因子2激酶(e EF2K)的变化,探讨e EF2K活性变化在早期糖尿病视网膜病变(DR)中的意义。方法建立SD大鼠链脲佐菌素(STZ)糖尿病高血糖模型,造模成功后,设立糖尿病大鼠(DM)组和正常对照(NC)组。qRT-PCR检测DM组和NC组4周和8周时大鼠神经视网膜中e EF2K的表达情况。免疫荧光法观察定位神经视网膜中e EF2K激活标志物-磷酸化真核生物延伸因子2(p-eEF2)和Müller细胞活化标志物胶质纤维酸性蛋白(GFAP)表达情况。结果 4周和8周时DM组大鼠神经视网膜中e EF2K的表达水平与NC组相比无明显变化。8周时DM组大鼠神经视网膜各层均出现e EF2K激活表现,即p-eEF2表达增强。神经节细胞层出现细胞凋亡样改变,凋亡样神经节细胞中e EF2的磷酸化水平增强最为明显。神经视网膜中Müller细胞活化,GFAP蛋白表达增强。结论 STZ诱导糖尿病大鼠早期视网膜病变中神经视网膜内e EF2K激活,在凋亡样神经节细胞中e EF2K活性上升最为显著。福建省自然科学基金项目(2016J 01412);;国家自然科学基金青年项目(81700864

江苏省农村地区自然人群戊型肝炎感染状况的研究

目的:了解江苏省农村地区戊型肝炎病毒(HEV)感染的特征及相关影响因素。方法:在江苏省部分农村地区,以整群抽样的方式进行戊型肝炎感染的血清学横断面调查以及1年的随访性研究,并对分离到的毒株进行基因分型,同时调查感染的相关影响因素。结果:横断面调查的4139例自然人群中,抗-HEV-IgG阳性率为52.0%,男性阳性率显著高于女性,各年龄组阳性率随年龄升高而增加。经1年的随访,抗-HEV-IgG年阳转率为11.6%,20岁以上年龄组的阳转率显著高于20岁以下年龄组;抗-HEV-IgG年阴转率为5.8%,0～9岁以下年龄组的阴转率显著高于10岁以上年龄组。从亚临床感染者分离到的5份HEV毒株中,基因Ⅰ型3株、基因Ⅵ型2株。相关影响因素分析显示,男性、年龄增加和接触生猪是感染的危险因素。结论:江苏省农村地区的HEV感染程度较高,亚临床感染的HEV基因分型为Ⅰ型和Ⅳ型;除性别、年龄外,接触生猪是感染的重要影响因素

第十八届美国理论与应用力学大会总结

1会议概况2018年6月5—9日,第18届美国理论与应用力学大会(18th U.S. National Congress of Theoretical and Applied Mechanics, USNCTAM2018)在美国芝加哥召开.本次大会由美国力学国家委员会和中国力学学会联合主办,旨在探讨和交流近四年世界范围内在理论和应用力学领域的基础研究、创新技术的最新进展,吸引了来自世界各地的近千名专家学

风机偏心对空冷梁式桥架振动实验研究

The vibration problem of air-cooling fan bridge has been troubling the north thermal power plant.Excessive vibration amplitude causes the damage of fan,motor,reducer and other equipment,and affects the stability and economic benefit of power plant operation.In this paper,the vibration speed of the air-cooling fan exceeded the standard as the research object,and the data acquisition instrument and acceleration sensor were used to test the vibration of the air cooling fan bridge in the power plant of xiaoyi in Shanxi Province.According to the frequency characteristics generated by these incentives,the main influence factors of the vibration of the fan bridge caused by the original fan blades were explored.By analyzing the vibration signal,the main influencing factors of the vibration of fan bridge are explored according to the frequency characteristics.The test results show that the excessive vibration of the bridge is caused by the interference force caused by the fan eccentric mass.During the operation of the fan,the phase of the sensor at the middle of the bridge alternates positively and negatively,and the fan shaft produces a sway,which is inconsistent with the expected horizontal vibration of the bridge.In order to verify the rationality of the above analysis,the finite element analysis of the bridge frame was carried out,and the results are consistent with the above conclusions.Through the forced vibration test and hammer test of the fan bridge,it is found that the maximum frequency value of the vibration of the fan bridge caused by eccentric mass is far away from the natural vibration frequency of the fan bridge,and will not cause the resonance phenomenon of the fan bridge.Therefore,the vibration of the fan bridge caused by eccentric mass is only related to the static stiffness of the fan bridge.The test results will provide a basis for the design of beam bridge and the avoidance of vibration caused by fan eccentricity