摘要：A hybrid optimization approach combining a particle swarm algorithm, a genetic algorithm, and a heuristic interleaving algorithm is proposed for scheduling tasks in the multifunction phased array radar. By optimizing parameters using chaos theory, designing the dynamic inertia weight for the particle swarm algorithm as well as introducing crossover operation and mutation operation of the genetic algorithm, both the efficiency and exploration ability of the hybrid algorithm are improved. Under the frame of the intelligence algorithm, the heuristic interleaving scheduling algorithm is presented to further use the time resource of the task waiting duration. A large-scale simulation demonstrates that the proposed algorithm is more robust and efficient than existing algorithms.

摘要：The pore structure of porous scaffolds plays a crucial role in bone *** prevalent bone implant structure in clinical practice is the traditional cubic ***,the traditional cubic structure exhibits sharp edges and junctions that are not conducive to cell adhesion or *** this study,a double gyroid(DG)Ti6Al4V scaffold based on a triply periodic minimal surface(TPMS)structure was devised,and the osseointegration performance of DG structural scaffolds with varying porosities was *** tests revealed that the elastic modulus and compressive strength of DG structural scaffolds were sufficient for orthopedic *** vitro cellular experiments demonstrated that the DG structure significantly enhanced cell proliferation,vascularization,and osteogenic differentiation compared to the cubic *** DG structure with 55%porosity exhibited the most favorable *** vivo experiments in rabbits further demonstrated that DG scaffolds could promote neovascularization and bone regeneration and maturation;those with 55%porosity performed *** the surface area,specific surface area per unit volume,and internal flow distribution characteristics of gyroid and DG structure scaffolds,the latter are more conducive to cell adhesion and growth within *** study underscored the potential of DG scaffolds based on the TPMS structure in optimizing the pore structure design of titanium scaffolds,inducing angiogenesis,and advancing the clinical application of titanium scaffolds for repairing bone defects.

摘要：TLP立管系统以丛式方阵排列,台风条件下立管在波浪、海流及平台的联合作用下可能发生碰撞,有必要深入研究TLP串行立管系统的碰撞情况。文章基于DNV-RP-F203规范和Huse半经验尾流模型,提出台风条件下串行立管下游立管来流速度计算方法和立管系统碰撞分析方法,建立串行立管—井口—导管系统耦合有限元模型,研究台风条件下串行生产立管系统碰撞时的力学特性,在整体碰撞分析的基础上进行立管局部碰撞精细化分析,对比分析立管局部碰撞理论解和仿真解的不同。结果表明:下游立管来流速度的计算至少采用文中建立的方法迭代3次。串行立管发生碰撞时的最大应力发生在泥面导管处,碰撞位置应力发生了突变;立管发生碰撞的位置在水深100-120 m范围内。立管局部碰撞分析的理论解和仿真解基本吻合。

摘要：“一带一路”国际文化创意园雕塑艺术馆作为呼和浩特市城市新文化地标性建筑,其外墙为保温一体清水混凝土墙体,局部为弧形墙体,极具艺术气息,符合雕塑艺术馆的特有气质。同时对清水混凝土墙体一次性成活的施工工艺及质量控制要求较高,通过对清水混凝土的原材料控制、配合比设计、钢筋、模板、混凝土浇筑等多种途径进行清水混凝土质量控制,提出针对超高、超厚保温一体清水混凝土墙体、弧形清水混凝土墙体质量的施工方法,可为类似工程施工提供参考。

摘要：首先分析了带光储的模块化电力电子变压器(Modular Multilevel Converter Power Electronic Transformer,MMC-PET)在配电网中的优越性和MMC-PET对新能源接纳的优势,设计了一种模块化电力电子变压器新型拓扑结构,采用一种三重化的DC/DC变换器作为储能系统的接口,并提出一种储能变流器的协调控制,其中光储系统通过模块化电力电子变压器的低压直流母线接入,其次对模块化电力电子各级控制器和光储变流器控制器进行设计,最后利用Simulik进行仿真,其仿真结果验证了带光储系统的模块化电力电子变压器的技术优势。

摘要：Covalent organic frameworks(COFs)are garnering significant interest in photocatalytic CO_(2) ***,their limited efficiency in separating photogenerated carriers and the scarcity of catalytic sites lead to suboptimal photocatalytic *** we develop a molecular engineering approach to design a pyrene-based COF(PyTa-H COF)confined cobalt single atoms photocatalyst(Co SACs)for CO_(2) *** moiety is introduced to enhance visible-light harvesting capability and improve charge separation in the ***,Co SACs enhance the photocatalytic activity by accelerating the migration of photo-induced carriers and reducing the reaction energy of the rate-determining ***,PyTa-H@Co achieves a CO production rate of 18.36 mmol g^(−1) h^(−1) and a selectivity of 94%in 4 h under visible light irradiation,which is comparable to the reported best-performing *** functional theory calculations reveal that the Co SACs greatly stabilize*COOH and significantly reduce the energy of the decisive step,leading to outstanding photocatalytic *** work,through molecular engineering design,highlights the critical relationship between catalyst structure and function in enhancing photocatalytic efficiency.

摘要：使用轮廓法测量铝合金T形构件淬火残余应力,重点研究了测量误差的数据处理。采用包络处理、左右轮廓平均、Gauss混合模型拟合以及节点插值处理后,得到最终轮廓值,并将其作为边界条件反向加载到应力重构有限元模型中,得到待测面应力场。使用X射线衍射法对待测面边界处应力进行修正。将测量结果和有限元模拟淬火结果进行对比,利用统计学方法分析对比结果。结果表明:轮廓法和X射线衍射法结合可以很准确地描述T形构件淬火残余应力场。T形构件淬火残余应力最大拉应力出现在筋条和腹板交界处,靠近腹板一侧。

摘要：提出一种基于改进人工势场法且带有输入量化的欠驱动无人船编队协同避碰避障策略.借鉴导弹制导与控制机理,分层设计无人船运动学制导律与动力学控制律.首先,基于辅助变量法在无人船运动学子系统中设计分布式制导律,并引入改进人工势场法的斥力函数.通过重构制导律实现运动学层面的协同避碰避障以及欠驱动无人船期望轨迹的跟踪;其次,通过使用径向基神经网络对无人船动力学子系统中的外界干扰和系统未建模动态进行逼近,采用均匀量化器对输入变量进行量化并对量化过程进行线性描述,使得底层量化控制器无需预测关于量化参数的具体信息;在稳定性分析中,利用李雅普诺夫稳定性理论证明所设计USV编队跟踪控制系统的稳定性;最后,采用Matlab对理论策略进行仿真实验,仿真结果验证了所提出策略的有效性.

摘要：通过对制冷空调系统压缩机的故障模式、影响及危害性分析(FMECA)以及压缩机在空调系统中的试验条件、试验应力、综合试验剖面的研究,选取适合评价压缩机在系统上的可靠性增长摸底试验研究方法,暴露产品的潜在缺陷,并及时采取纠正措施,使制冷压缩机的可靠性水平得到增长。

摘要：针对跟踪路径复杂、立体空间运动、模型参数动态变化、风浪流扰动下的多无人潜航器(unmanned underwater vehicle,UUV)协同路径跟踪问题开展研究.首先,针对UUV跟踪复杂路径情形设计自适应前视距离策略,使得UUV可以更好地跟踪复杂水下路径;其次,针对立体空间运动的UUV集群,设计三维视距制导律和协同控制律引导UUV集群在三维空间中沿参数化路径运动;最后,针对模型参数动态变化、风浪流扰动影响下的UUV集群,设计自抗扰控制器实现对动态变化模型、总扰动信息和速度信息的统一估计,保证动力学控制的稳定性.仿真结果验证了所提出基于自适应视距制导的无人潜航器三维协同路径跟踪控制方法的有效性.