拖拉机传动系统诊断与自动标定软件开发

拖拉机整车装配完成后,为了保证传动系电控TCU、电子零部件及各液压阀块正常运转,需要使用＂拖拉机传动系诊断与自动标定软件＂,对整车电气故障进行诊断与排除,并对离合器踏板、各液压阀块进行自动标定。     

TCU功能调试器的研制

研制开发了TCU功能调试器,该TCU功能调试器凭借创新的软件设计方案,可以全面、精确地模拟现场拖拉机电控传动系试验所用到的各类电子信号,并在液晶显示屏中显示设置信息,为在办公室环境中进行TCU开发创造了必要条件,在方便技术人员研发的同时大大降低了调试成本。     

基于动态CGE模型的能源价格传导效应分析

从成本推动的视角出发,将能源放入一般均衡的框架,通过各种嵌套函数、税收和汇率转换等内在机理把价格之间的关系联系起来,对能源价格的传导机制进行理论分析;并将该分析框架纳入可计算一般均衡模型,定量分析能源价格变动的经济效应。研究结果显示,能源价格上涨对宏观经济具有紧缩作用,其中煤电价格对经济增长的紧缩作用比石油大;能源价格上涨导致第二产业内部发生较为明显的差异性变化,说明其对产业结构调整有明显作用,而这样的产业结构调整又会对各产业的耗能和污染排放的减少起到积极作用。     

A longitudinal study of the risks for introduction of severe footrot into sheep flocks in the south west of Norway

In 2008, ovine footrot was detected in Norway for the first time since 1948. By December 2012 it had spread to 99 flocks, all in the county of Rogaland in the south west of Norway, and 42% of which were located in the municipality of Rennesøy in Rogaland. The aim of this study was to investigate risk factors for contracting severe footrot in flocks of sheep. A flock was considered positive for severe footrot based on positive virulence test or by clinical signs in addition to a positive PCR test.     

Pathogenicity and transmission of H5N1 avian influenza viruses in different birds

In this study, we selected three H5N1 highly pathogenic avian influenza viruses (HPAIVs), A/Goose/Guangdong/1/1996 (clades 0), A/Duck/Guangdong/E35/2012 (clade 2.3.2.1) and A/Chicken/Henan/B30/2012 (clade 7.2) isolated from different birds in China, to investigate the pathogenicity and transmission of the viruses in terrestrial birds and waterfowl. To observe the replication and shedding of the H5N1 HPAIVs in birds, the chickens were inoculated intranasally with 10⁶ EID₅₀ of GSGD/1/96, 10³ EID₅₀ of DkE35 and CkB30, and the ducks and geese were inoculated intranasally with 10⁶ EID₅₀ of each virus. Meanwhile, the naive contact groups were set up to detect the transmission of the viruses in tested birds. Our results showed that DkE35 was highly pathogenic to chickens and geese, but not fatal to ducks. It could be detected from all the tested organs, oropharyngeal and cloacal swabs, and could transmit to the naive contact birds. GSGD/1/96 could infect chickens, ducks and geese, but only caused death in chickens. It could transmit to the chickens and ducks, but was not transmittable to geese. CkB30 was highly pathogenic to chickens, low pathogenic to ducks and not pathogenic to geese. It could be transmitted to the naive contact chickens, but not to the ducks or geese. Our findings suggested that H5N1 HPAIVs from different birds show different host ranges and tissue tropisms. Therefore, we should enhance serological and virological surveillance of H5N1 HPAIVs, and pay more attention to the pathogenic and antigenic evolution of these viruses.     

分析行星齿轮变速机构传动的矩阵方法

通过对行星齿轮变速机构的研究,提出了一种应用矩阵分析传动问题的新方法,即以矩阵理论的概念,分析建立复杂行星齿轮变速机构的传动矩阵的方法,并基于MATLAB研究其传动问题。     

轮式车辆动力传动系自激振动研究(Ⅲ)——自激振动系统的稳定性分析

该文建立了整车振动系统（包括整车垂直振动系统、整车纵向振动系统和动力传动系统）的力学模型，对整车振动的非线性运动微分方程在平衡点附近线性化，根据当量线性化系统在状态空间中的特征值判断系统的稳定性，并作出了影响系统在外界参数空间的临界稳定曲面，为研究抑制自激振动的措施提供理论依据     

紫外线杀灭营养液中黄瓜枯萎病病菌试验

设计、试制了一种可以用于无土栽培循环营养液消毒的紫外线消毒系统,并对其杀灭黄瓜枯萎病病原菌的性能和效果进行了实验室研究。先将黄瓜枯萎病病原(Fusariumoxysporumf.sp.cuc鄄umerinum)菌株接种于PDA培养基上,培养后将其加入到营养液中进行紫外线照射。通过对紫外线照射前后的病原浓度进行计数,发现紫外线对黄瓜枯萎病病原有较好的杀灭效果。在营养液紫外线透射率(T10)为96.65%、病原浓度为6.87×102conidia/ml、最大流量为36L/min时,灭菌率为100%;在营养液紫外线透射率(T10)为95.42%、病原浓度为1.14×105conidia/ml、最大流量为36L/min时,灭菌率为100%;在T10降低为11.58%、病原浓度为1.44×104conidia/ml、最大流速为35L/min时,灭菌率也在50%以上。     

履带车辆传动系统的传热仿真

分析了履带车辆传动系统的传热过程，应用集总参数法建立了传动系统的传热模型，基于一维不可压缩流动理论建立了传动润滑系统的流动模型。采用耦合分析的方法将传动系统的传热与流动作为一个整体进行研究，建立了履带车辆传动系统的综合传热仿真模型，并编制了仿真程序。对某型履带车辆传动系统的传热进行了实例仿真，仿真结果与试验值较为一致，为研究其传热性能提供了有效的依据。