摘要：By integrating topology optimization and lattice-based optimization,a novel multi-scale design method is proposed to create solid-lattice hybrid structures and thus to improve the mechanical performance as well as reduce the structural *** achieve this purpose,a two-step procedure is developed to design and optimize the innovative ***,the classical topology optimization is utilized to find the optimal material layout and primary load carrying ***,the solid-lattice hybrid structures are reconstructed using the finite element mesh based modeling *** lattice-based optimization is performed to obtain the optimal crosssection area of the lattice ***,two typical aerospace structures are optimized to demonstrate the effectiveness of the proposed optimization *** numerical results are quite encouraging since the solid-lattice hybrid structures obtained by the presented approach show remarkably improved performance when compared with traditional designs.

摘要：In this paper, a bias-eliminated subspace identification method is proposed for industrial applications subject to colored noise. Based on double orthogonal projections, an identification algorithm is developed to eliminate the influence of colored noise for consistent estimation of the extended observability matrix of the plant state-space model. A shift-invariant approach is then given to retrieve the system matrices from the estimated extended observability matrix. The persistent excitation condition for consistent estimation of the extended observability matrix is analyzed. Moreover, a numerical algorithm is given to compute the estimation error of the estimated extended observability matrix. Two illustrative examples are given to demonstrate the effectiveness and merit of the proposed method.

摘要：Safety system testing is one of the most rigorous and time-consuming requirements in the verification and validation process for reactor protection systems(RPSs).This paper presents the development of a test system for the fully digital and field-programmable gate array-based RPS of the solid fuel(SF) thorium-breeding molten salt pebble bed fluoride salt-cooled reactor(TMSR),denoted as the TMSR-SF1 project,developed by the Chinese Academy of *** test system is applied to the RPS to ensure that it fully meets its designed functions and system *** first introduce the testing principles and ***,the hardware component designs and the software program development of the test system are ***,the test process and test results are discussed and summarized.

摘要：The purpose of this paper is to present an extended topology optimization method for the stiffeners layout design of aircraft assembled structures. Multi-fastener joint loads and manufacturing constraints are considered simultaneously. On one hand, the joint loads are calculated and constrained within a limited value to avoid the failure of fasteners. On the other hand, the manufacturing constraints of the material distribution in the machining directions of stiffeners are implemented by an improved piecewise interpolation based on a beveled cut-surface. It is proven that the objective function is strictly continuous and differentiable with respect to the piecewise interpolation. The effects of the extended method with two different constraints are highlighted by typical numerical examples. Compared with the standard topology optimization, the final designs have clearly shown the layout of stiffeners and the joint loads have been perfectly constrained to a satisfying level.

摘要：针对工程中常见的多钉连接装配结构,提出了一种同时考虑钉载和疲劳性能的拓扑优化设计方法.一方面,将钉载约束考虑到装配结构的拓扑优化设计中,针对结构中大量的钉载约束,采用约束凝聚技术,简化了多约束问题灵敏度求解过程,提高了优化的计算效率.另一方面,将疲劳准则作为设计约束引入到拓扑优化问题中,为了避免因多钉连接结构建模方法引起的不真实应力状态对优化问题产生影响,采用组合单元对连接结构进行建模,用被连接件壳单元上的应力衡量结构疲劳性能,采用P范数凝聚方法对疲劳约束进行凝聚,在此基础上研究了拓扑优化设计中疲劳性能对结构拓扑形式和承载性能的影响.最后通过两个数值算例验证了所提方法的有效性.

摘要：由于光照强度等不可控因素的影响,光伏模块输出功率具有较大的随机性,容易降低光储并网系统的暂态性能。为此,该文在光储一体化变流器中提出了一种改进滑模自抗扰控制(SM-ADRC)策略以降低暂态时的直流母线电压波动并加快功率响应速度。首先,针对传统扩张状态观测器(ESO)对状态变量和扰动观测精度不足的问题,引入新的误差作为ESO的调节依据以提升跟踪能力;其次,将反步设计和互补滑模控制相结合运用到状态误差反馈律中,以提升控制系统的鲁棒性,并通过改进指数趋近律减小滑模固有的抖振现象;再次,从理论上证明了基于改进指数趋近律的反步互补滑模(BCSMC)和改进ESO的稳定性以及改进ESO的误差范围;最后,通过仿真和StarSim实验平台对比在不同工况下的直流母线波动情况和功率响应速度,验证了所提改进SM-ADRC策略相比于传统SM-ADRC策略和PI控制策略的优越性和可行性。

摘要：拉斯邦巴斯铜矿运用现代化信息技术构建覆盖“地质资源—计划管理—过程控制—安全保障—智能决策”全方位智能化建设框架,通过关键应用场景设计与应用,实现矿山生产运营的高效协同与智能管理。针对矿体赋存条件复杂、开采规模庞大、作业地点分散等问题,应用矿床地质建模、三维可视化及无人机技术,实现矿山全生命周期的地质资源精细化管控。在此基础上优化开采工艺,应用精准定位及智能卡调技术,实现大规模高陡边坡的精准穿孔、控制爆破以及矿岩运输。构建了以超前预防为目标,全面覆盖人、机、环、管,与生产过程深度融合的矿山安全监测预警体系,显著提升了矿山的安全作业水平。通过云平台和数据湖技术实现多源异构数据融合,应用机器学习算法构建数据分析与决策模型,为矿山管理者科学决策提供有力支持。拉斯邦巴斯铜矿智能化建设成果对于国内大型露天矿山智能化建设具有一定的示范作用。

摘要：研究采用Tobii T60型眼动仪记录了男女被试观看名人/非名人广告时的眼动数据,并结合主观评定法,讨论了名人代言广告和被试性别因素对广告效果的影响。结果表明:名人广告会增加受众对广告整体的注视时间及首次注视时间,提高受众对广告文本的注视时间及注视次数,名人广告更容易被受众首先开始关注。性别也是影响广告效果的一个重要因素,在浏览广告时,男性更关注广告的品牌,而女性更关注广告的图片;在对广告的态度上,女性态度更好;男性相对女性可以更好的记住广告中的品牌及文本。研究为名人代言广告的效果测评提供了新方法,为名人代言广告的设计提供了参考依据。

摘要：To obtain a small-angle monoenergetic neutron source,a shielding collimator device is designed for the neutron source generated by a neutron *** device is divided into the collimator and the capture *** collimator is made of three layers of stainless steel and borated polyethylene and is used to constrain neutrons in a small *** capture cave is used to increase the number of times neutron inelastic scattering occurs in the opposite direction of the radiation field,thereby reducing the proportion of scattered neutrons in the radiation *** thickness,aperture size,and the optimum structure of the capture cave were simulated using *** design features a neutron emission angle within a range of 3° and neutron fluxes in the radiation field,which are higher by two orders of magnitude than those outside the radiation *** research has practical value for the generation of monoenergetic small-angle neutron sources and neutron applications.

摘要：采用同温轧制和降温轧制的方法对动漫设计用AZ61镁合金进行了双衬板轧制,对比分析了轧制和退火工艺参数对AZ61合金组织与力学性能的影响,优化了AZ61合金的轧制和退火工艺。结果表明,降温轧制的AZ61合金中出现了较多的变形孪晶,而同温轧制的合金中未见变形孪晶;降温轧制的AZ61合金中的颗粒状Mg17Al12相分布更加均匀,而同温轧制的AZ61合金中除了细小的颗粒状Mg17Al12相外,还存在短棒状Mg17Al12相;降温轧制AZ61合金在相同退火工艺下的抗拉强度和屈服强度比同温轧制AZ61合金更高,而伸长率略低;降温轧制AZ61合金在退火温度300℃、保温时间3 h时有较好的强度和塑性结合。