摘要：运用信息技术进行课程整合是目前广泛应用的教学手段之一,也是现代教育理念和教育技术应用教学的体现。信息技术作为一种技术性教学支撑手段,必须始终服务于教学内容,遵从教育教学规律合理地进行课程整合,根据学科特点和学生状况灵活选择适当的整合形式。分析广告设计学科特点,探讨运用信息技术手段进行课程整合方法。

摘要：For unacceptable computational efficiency and accuracy on the probabilistic analysis of multi-component system with multi-failure modes,this paper proposed multi-extremum response surface method(MERSM).MERSM model was established based on quadratic polynomial function by taking extremum response surface model as the sub-model of multi-response surface *** dynamic probabilistic analysis of an aeroengine turbine blisk with two components,and their reliability of deformation and stress failures was obtained,based on thermal-structural coupling technique,by considering the nonlinearity of material parameters and the transients of gas flow,gas temperature and rotational *** results show that the comprehensive reliability of structure is 0.9904 when the allowable deformations and stresses of blade and disk are 4.78×10–3 m and 1.41×109 Pa,and 1.64×10–3 m and 1.04×109 Pa,***,gas temperature and rotating speed severely influence the comprehensive reliability of *** the comparison of methods,it is shown that the MERSM holds higher computational precision and speed in the probabilistic analysis of turbine blisk,and MERSM computational precision satisfies the requirement of engineering *** efforts of this study address the difficulties on transients and multiple models coupling for the dynamic probabilistic analysis of multi-component system with multi-failure modes.

摘要：为建立柔性机构可靠性优化设计的理论与方法.用传统方法进行柔性机构截面尺寸的初步设计,将模态综合法与柔性多体系统动力学相结合,建立柔性机构拉格朗日形式的动力学微分方程,用蒙特卡罗法抽取柔性机构输入参数随机样本,并对每个样本求解动力学微分方程,得到对应的位移、速度、加速度在分析时域内的响应,在此基础上求出对应的动态应力和挠度响应.将不同输入样本对应的应力和变形输出响应在分析时域内的最大值的全体作为新的输出(极值)响应,构造极值响应面函数.以材料密度、弹性模量、许用刚度、强度和构件截面尺寸为随机变量,以构件尺寸为设计变量,以机构质量为目标函数,以设计变量表示的可靠性指标为约束函数,对柔性机构进行可靠性优化设计.实例计算表明,该设计方法在满足可靠性要求的情况下使得机构的质量最小.

摘要：To improve the computational efficiency of the reliability-based design optimization(RBDO) of flexible mechanism, particle swarm optimization-advanced extremum response surface method(PSO-AERSM) was proposed by integrating particle swarm optimization(PSO) algorithm and advanced extremum response surface method(AERSM). Firstly, the AERSM was developed and its mathematical model was established based on artificial neural network, and the PSO algorithm was investigated. And then the RBDO model of flexible mechanism was presented based on AERSM and PSO. Finally, regarding cross-sectional area as design variable, the reliability optimization of flexible mechanism was implemented subject to reliability degree and uncertainties based on the proposed approach. The optimization results show that the cross-section sizes obviously reduce by 22.96 mm^2 while keeping reliability degree. Through the comparison of methods, it is demonstrated that the AERSM holds high computational efficiency while keeping computational precision for the RBDO of flexible mechanism, and PSO algorithm minimizes the response of the objective function. The efforts of this work provide a useful sight for the reliability optimization of flexible mechanism, and enrich and develop the reliability theory as well.

摘要：南宋理学家词人群或以《四书》《五经》语汇为表征,或以理学精义为内在审美蕴涵,在语汇及意蕴层都受理学思维影响。其批判型与艺术型兼容的词学理论反映了词人创作的真实状态及理学家原本存有的双重标准。作为南宋实际存在的一个词学群体,尽管它难以割脱与主流词派的关系,但其词学特征仍是相当鲜明的。对这一特殊词人群体的研究,有助于全面把握南宋词学发展的多元走向及词派演进的内在规律。

摘要：根据导致电气火灾的原因中,线路单相接地故障的严重性及普遍性,设计了剩余电流式电气火灾监控探测设备,通过对被监测设备剩余电流的循环AD中断式采集,可以有效地预防剩余电流造成的危害。

摘要：深入研究了河南省南阳市城市地下水系统,分析了现状地下水监测工作存在的问题,全面系统、经济合理、科学地设计了南阳市城市地下水监测体系,加强对城区段白河水文要素的监测,满足监控地下水资源质和量的变化及研究需要,为合理开发利用和保护地下水资源,保障城市饮水安全服务。

摘要：维生素是动植物生长发育所必需的微量营养素,包括A、B族(B1、B2、B3、B5、B6、B7、B9、B12)、C、D、E和K等。这些物质由于人体内不能合成或合成量不足,所以虽然需要量很少,但必须从膳食特别是植物性食品中获得。因此,利用生物强化技术来提高植物合成的维生素含量可以有效地应对全球性维生素缺乏的问题,对人类的生存与健康具有重要意义。综述了近年来国内外植物中维生素代谢和生物强化的主要研究成果,并对利用分子设计育种进行维生素生物强化的未来发展方向进行了展望。

摘要：叶酸(folates)是一类水溶性B族维生素,包括四氢叶酸(tetrahydrofolate,THF)及其衍生物,是动植物体中参与C1转移反应的重要辅酶,在嘌呤、胸苷酸、DNA、氨基酸和蛋白质的生物合成以及甲基循环中发挥重要作用,也是动植物体生长发育所必需的微量营养素。由于人类不具备自身合成叶酸的能力,因此,需要从植物和微生物中摄取。人类缺乏叶酸会增加许多疾病风险,全球叶酸缺乏的人群仍比较普遍,利用生物强化提高作物的叶酸含量是一个解决全球性叶酸缺乏问题的有效方法,对人类生存与健康具有重要意义。现综述了近年来国内外叶酸代谢和作物叶酸生物强化的主要研究成果,并对叶酸生物强化分子设计育种的未来发展方向进行了展望。

摘要：鉴于研究岩土体导热系数的变化规律及影响因素，对岩土的导热理论和工程实践的现实意义，利用热探针测定了不同孔隙率和含水率条件下的砂质土样导热系数，分析其变化规律，并用1stOpt软件得到孔隙率、含水率与导热系数的拟合公式。计算结果与试验结果表明，导热系数随孔隙率的增加而减小，随含水率的增加而增大，且在一定含水率下，导热系数随孔隙率的增加呈线性减小，孔隙率为0．468～0．511时，导热系数降幅为20．19％；在一定孔隙率下，导热系数随含水率的增加呈非线性增长，含水率0～10％时，导热系数增幅为338．38％，含水率10％～15％时，导热系数的增幅为8．83％。