摘要：Selective laser melting(SLM)is an emerging layer-wise additive manufacturing technique that can generate complex components with high ***-reinforced aluminum matrix composites(PAMCs)are important materials for various applications due to the combined properties of Al matrix and *** the advantages of SLM technology and PAMCs,the novel SLM PAMCs have been developed and researched in recent ***,the current research progress about the SLM PAMCs is ***,special attention is paid to the solidification behavior of SLM ***,the important issues about the design and fabrication of high-performance SLM PAMCs,including the selection of reinforcement,the influence of parameters on the processing and microstructure,the defect evolution and phase control,are highlighted and discussed ***,the performance and strengthening mechanism of SLM PAMCs are systematically figured ***,future directions are pointed out on the advancement of high-performance SLM PAMCs.

摘要：Recently,Gehér and Semrl have characterized the general form of surjective isometries of the set of all projections on an infinite-dimensional separable Hilbert space using unitaries and *** this paper,we study the surjective L^(2)-isometries of the projection lattice of an infinite dimensional Hilbert space and show that every such isometry can also be described by unitaries and antiunitaries.

摘要：汤家桥路与机场大道交叉口为主干路相交形成的五叉路口,通过利用左转二次控制方法,降低交叉口混乱程度,极大地提高了环行交叉口的通行能力。

摘要：以工程教育认证为契机,融合理论课程、实验课程以及实践环节,针对控制科学与工程学科的综合实训实践设计改革问题,根据设计要求,阐述了直立平衡两轮CCD智能车实验项目,分析了其中的主要技术问题和非技术问题,指出对该实验项目的研究可以培养学生的综合素质,使学生掌握基本的科研方法以开展针对专业复杂工程问题的研究工作,并将学生的"综合、实践"能力培养提升到创新意识层面。

摘要：We propose a configurable surface-electrode ion trap design to alleviate the poor reusability of the existing *** can architecturally and electrically support 5 mainstream modes by design reuse,thus enhancing the trap reusability and reducing the experiment setup *** also develop a corresponding simulation suite which can optimize trap geometries and calculate trap parameters to control the trapped ion's classic *** to our analytical and simulated results,the configurable design can serve as a unified platform for basic research of large-scale quantum information processing.

摘要：利用Petri网中T不变量的思想,针对约束为T不变量的Parikh向量形式的job-shop调度问题,提出了一种分层控制器的设计算法,该算法有效地解决了这一有并发约束的控制问题。即使随着系统规模的增大,该方法计算量仍然很小,而且与经典的库所不变量方法相比较,它不受有无自回路的约束,可有效地解决一类实际制造系统中的job-shop调度问题。

摘要：结构健康监测系统在公路桥梁中得到了广泛应用。利用PSO智能优化算法对LSTM神经网络模型中参数进行优化,设计了PSO—LSTM算法对公路桥梁进行结构损伤识别,以提升桥梁结构工况的实时监测状态和评估效果的准确率。通过建立斜拉桥有限元模型获取静态数据、动态响应数据和振动响应数据等桥梁结构监测数据,建立深度学习的数据库,对桥梁的结构工况进行损伤识别分析。结果表明,PSO—LSTM算法对桥梁结构工况损伤识别的准确率可达到平均98.53%以上的较高水平,优于单一的LSTM深度学习算法和目前应用的PSO—BP神经网络学习算法。为公路桥梁全生命健康周期管理中结构损伤监测提供了一种有效的解决方案。

摘要：In order to design the scale model in a wide frequency range,a method based on the reflective loss is proposed according to the high-frequency approximation algorithm,and an example of designing the scale model of a plate-shaped absorber is given in this *** the example,the frequency of the full-size measurement ranges from 2.0 GHz to 2.4 GHz,the thickness of the full-size absorber is 1 mm and the scale ratio is 1/5.A two-layer scale absorber is obtained by the proposed *** thickness values of the bottom and top layer are 0.4 mm and 0.5 mm,***,the scattering properties of a plate model and an SLICY model are studied by FEKO to verify the effectiveness of the designed scale *** with the corresponding values from the theoretical scale model,the average values of the absolute deviations in 10 GHz～12 GHz are 0.53 d Bm^2,0.65 d Bm^2,0.76 d Bm^2 for the plate model and 0.20 d Bm^2,0.95 d Bm^2,0.77 d Bm^2 for the SLICY model while the incident angles are 0°,30°,and 60°,*** deviations fall within the Radar cross section（RCS） measurement ***,the work in this paper has important theoretical and practical significance.

摘要：针对钢结构屋顶分布式光伏组件布置及环境模拟研究的问题,提出了一种新的温室内辐射得热模型算法。该算法通过精确计算太阳辐射的入射角、直射辐射、散射辐射和反射辐射的贡献比例,解决了温室内部辐照量和温度分布不均的问题。研究结果实现了对温室内光伏组件布置的优化,并通过实验验证了模型的准确性。

摘要：A 325-MHz superconducting half-wave resonator has been designed with β = 0.51. Three shapes of the inner conductors(race track, ring shape and elliptical shape) were optimized to decrease the peak electromagnetic fields and minimize the dissipated RF power on the cavity walls. In order to suppress the operation frequency shift caused by fluctuations of the helium pressure and maximize the tuning ranges, the frequency shifts and mechanical properties were studied on the electric and magnetic areas. The helium vessel was designed to keep the mechanical structure as robust as possible.