摘要：The aerodynamic performance, structural strength, and wheel weight are three important factors in the design process of the radial turbine for micro gas turbines. This study presents the experimental validation process of this integrated optimization design method by using the similarity theory. Cold modeling tests and investigations into the aerodynamic characteristics were performed. Experimental results showed that the aerodynamic efficiency of the micro radial turbine is 84.3% at the design point while also satisfying the aerodynamic and strength requirements. Meanwhile, the total weight of the turbine wheel is 3.8 kg which has only a 52.8% mass of the original design. This indicates that the radial turbine designed through this technique has a high aerodynamic performance, and thus can be applied to micro gas turbines. The results validated that this integrated optimization design method is reliable.

摘要：The design of exhaust hood is a typical high dimensional,expensive computational and black box ***-Point Search based Efficient Global Optimization(MSEGO)is proposed to solve this *** is used for the aerodynamic performance optimization of a low exhaust hood with non-axisymmetric outer flow *** optimization,the static pressure coefficient of the exhaust hood increases by 284.54%,and the aerodynamic performance analysis explains the reason of the ***,the analysis of variance(ANOVA)as the data mining technique is used to extract information of design space and analyze the influence of variables on the *** aerodynamic performance analysis and data mining,it indicates that non-axisymmetric outer flow guider and the width of outer hood has a significant effect on the aerodynamic ***,design lessons are derived and accumulated for the optimization of similar designs.

摘要：[目的]早期快速精准鉴定马尾松和火炬松杂交子代,选育高抗马尾松×火炬松家系,以期更好地防控松材线虫病。[方法]本研究以马尾松为母本,火炬松为父本进行杂交,比对火炬松和油松基因组序列设计特异性引物,筛选马尾松与火炬松种间特异性引物,对杂交后代进行扩增条带分析,建立马尾松×火炬松快速鉴定体系,通过接种松材线虫评价筛选高抗家系。[结果]从150对引物中筛选出12对引物组合用于鉴定,特异性强,稳定性好,且扩增率高。F1代29个家系共88个样本,其中81株鉴定为杂交植株,杂种率为92.05%;F2代21个家系共688个样本,其中279株为杂交植株,杂种率为40.55%;对马尾松×火炬松F2代13个家系进行抗性评价,获得5个高抗家系。[结论]12对引物组合可作为马尾松和火炬松杂交子代真实性鉴定,筛选获得5个高抗家系,为松材线虫病防控和抗性机理研究奠定基础。

摘要：Four eburicane-type triterpenoids with malonyl modifications,namely irpexoates A-D(1-4),were isolated from the fruiting bodies of the medicinal fungus Irpex *** structures of the new compounds were established by extensive spectroscopic methods,including 1D and 2D NMR,HRESIMS spectroscopic *** B(2)displayed weak cytotoxicity against four human cancer cell lines(A-549,SMMC-7721,MCF-7,SW480)with IC50 values varying from 22.9 to 34.0 pM,and irpexoate D(4)showed weak cytotoxicity against the human cancer cell line SW480 with an IC50 value of 35.2μM.

摘要：On the basis of computational of transonic viscid flow, the simulated annealing algorithm, used in statistical mechanics to study solid cooling process, is adaptedfor soving multi-objective cascades design problem. The simulated annealing algorithmdraws an analogy between the energy minimization in physical system and the objectivefunction in the real design problem, To model the multi-objective functions, a minimumdeviation method is used. In this paper, the loss and work are considered as the objectivefunctions. Simulated results indicate that this algorithm can be effectively applied to theimprovement of the design for transonic turbine cascades.

摘要：环型燃烧室虽然结构复杂,但具有燃烧效率高、结构紧凑等优点,更符合微型燃气轮机未来发展的要求。文中结合微型燃气轮机的研发,进行了 100kW 级微型燃气轮机环型燃烧室的初步设计工作,在设计中,采用了按燃烧完全度、总压恢复系数、原准机放大等三种方法进行基本几何尺寸的确定,并将三种设计尺寸相比较,取其最大设计尺寸进行燃烧室结构的初步设计;并在初步设计的基础上,通过数值计算及分析,探讨了燃烧室内燃烧流动和燃烧室出口温度分布的特点及其对进一步设计的影响;数值结果同设计数据的基本一致,表明文中设计基本满足了设计要求。

摘要：针对传统靶机用红外指示器在辐射强度、稳定性和持续时间方面存在的不足,对指示器的药剂配方、装药结构和装药密度进行了优化,设计了一种新型红外指示器。通过环境试验和发火试验,验证了新型红外指示器在经受振动、发射冲击和温度冲击后的可靠性,并测试了其红外辐射性能。结果表明:新型红外指示器在中波段(3.6~4.9μm)的辐射强度达到1200 W/sr,稳定辐射时间达到120 s,离散度控制在90 W/sr以内,且无团聚物现象,有效模拟了轻型战斗机的红外辐射特征。本研究的优化设计显著提升了靶机用红外指示器的性能,为提高空军部队实弹打靶训练的模拟真实性和安全性提供了技术支持。

摘要：基于控制理论的气动设计方法作为一种基于梯度的优化方法,通过引入伴随系统计算目标函数的敏感性导数,大大降低设计成本。本文将基于控制理论的气动设计方法应用到透平叶栅的气动反问题中,应用Euler方程研究了二维叶栅的压力反设计问题,并讨论了该方法具体实施中的关键问题,包括采用非均匀B样条进行二维叶栅造型;应用Thompson时间相关边界条件理论进行伴随方程特征分析;研究伴随方程的数值求解方法,构造伴随方程的耗散通量.通过算例证明了该气动设计方法适用性好,速度快,可以大大节约计算成本。

摘要：针对先进制造业对大型装备大范围精密尺寸测量需求,根据双目立体视觉测量原理设计了一种光笔式大视场三维视觉测量系统。基于透视投影变换下的时针顺序和共线性不变量设计了光笔特征点空间分布模式,实现了特征点的准确识别与接触探头坐标的计算。应用双目立体视觉传感器的透视投影和齐次坐标三维测量模型,以一维基线尺靶标自由移动和基准长度约束为核心,通过本质矩阵E的线性求解结合非线性优化实现了其结构参数的现场精确标定。研制了由光笔、双目立体视觉测量系统、便携式三脚架、一维基线尺靶标和测量软件构成的大视场三维视觉测量系统,完成了机器人本体表面三维数据的稠密测量实验,在7 m×4.7 m测量范围内系统的测量精度优于0.2 mm。实验显示设计的光笔式大视场三维视觉测量系统在光笔结构、发光点识别方法和系统标定方法上均具有新的思路。

摘要：将基于控制理论的形状优化设计方法应用于粘性可压流动条件下的透平叶栅三维气动反设计,详细推导了三维N-S方程伴随系统的偏微分方程组及其各类边界条件。讨论了伴随系统的解的适定性条件,并由此给出应用N-S方程进行气动优化的目标函数的选取限制．研究了伴随方程的数值求解技术,给出敏感性导数的最终计算式,结合拟牛顿算法发展了三维透平叶栅粘性反问题的气动设计方法。