摘要：The switchless reluctance motor’s non-permanent magnet structure design ensures its high reliability in the marine environment;thus,it is a feasible solution for the generator of a sea wave power generation ***,the corresponding thrust density and efficiency remain *** study focused on a new type of flat linear switched reluctance motor(LSRM),using the finite element software to establish a structural model,and optimized the design with the goal of improving the efficiency and energy *** entropy method was adopted for sensitivity stratification to objectively select weights to avoid the influence of subjectively selected different proportional weights on the optimization *** on the entropy method,the sensitivity of different structural parameters was stratified,and the simulated annealing algorithm,response surface method,and single parameter scanning method were combined for ***,the optimal structural size parameters of the motor were *** on the two-dimensional finite element method,to simulate the electromagnetic performance of the reluctance motor under different operating conditions,such as thrust,loss,and efficiency,changes in motor performance before and after optimization were compared to verify the high power generation efficiency and energy density of the optimized linear motor.

摘要：Aiming at reducing the difficulty of cooling the interior of high-density motors,this study proposed the placement of a water cold plate cooling structure between the axial laminations of the motor *** effect of the cooling water flow,thickness of the plate,and motor loss density on the cooling effect of the water cold plate were *** compare the cooling performance of water cold plate and outer spiral water jacket cooling structures,a high-speed permanent magnet motor with a high loss density was used to establish two motor models with the two cooling ***,the cooling effects of the two models were analyzed using the finite element method under the same loss density,coolant flow,and main *** results were as follows.(1)The maximum and average temperatures of the water cold plate structure were reduced by 25.5%and 30.5%,respectively,compared to that of the outer spiral water jacket motor;(2)Compared with the outer spiral water jacket structure,the water cold plate structure can reduce the overall mass and volume of the *** a 100 kW high-speed permanent magnet motor as an example,a water cold plate cooling system was designed,and the temperature distribution is analyzed,with the result indicating that the cooling structure satisfied the cooling requirements of the high loss density motor.

摘要：感应式磁声磁粒子浓度成像(MACT-MI)是一种基于磁声耦合效应的磁性纳米粒子(MNPs)浓度成像新方法,为降低激励源幅值,产生更加稳定的声压信号,该文提出一种基于矩阵式线圈的磁声磁粒子浓度成像系统,采用天牛须-鱼群优化算法对矩阵式线圈进行优化设计,根据优化结果采用多物理场仿真软件COMSOL对MACT-MI的物理过程进行求解,并将结果与Maxwell线圈进行对比,同时基于实际生物组织环境中的MNPs分布,构建浓度渐变模型,得到了成像区域的磁力、声压分布。结果表明,该文设计的矩阵式线圈能在较小的激励下产生大小相等且分布更为均匀的梯度磁场,从而产生更为稳定的声压信号;根据所构建的浓度渐变模型,MNPs所受磁力和声压波形宽度均与渐变区域宽度成正比,声压峰值与渐变区域的浓度梯度成正比。研究结果可为成像装备的设计以及MACT-MI的后续实验乃至临床应用提供研究基础。

摘要：设计并合成了一种在二甲基亚砜(DMSO)/磷酸缓冲溶液(PBS)(V∶V=5∶5,pH=10.17)中识别Hg^(2+)的荧光探针HMI-Hg^(2+).HMI-Hg^(2+)通过荧光信号增强识别Hg^(2+),并且溶液颜色在几秒钟内发生改变.光谱实验证实了该探针对Hg^(2+)具有高选择性和高灵敏度,检测限为0.22μmol/***-Hg^(2+)在水样和海鲜样品(鱼、虾和扇贝)中具有出色的检测效果.此外,HMI-Hg^(2+)可用于在MCF-7细胞中对Hg^(2+)进行成像,并具有线粒体靶向能力.

摘要：为满足空间可展开天线大型化、高精度、高刚度发展的迫切需求,提出一种模块化空间可展开天线支撑结构新构型,并对其进行了力学特性研究。首先,基于机构学基本理论,开展了天线总体结构方案设计和结构详细设计,建立了由19个六棱柱模块组成的模块化可展开天线三维模型。其次,根据压杆稳定理论,建立了天线支撑结构静力学分析模型,得到了拉索预紧力的取值范围。再次,建立了天线结构动力学分析模型,进行了模态分析,开展了固有频率影响因素及灵敏度分析与研究。最后,研制了一套天线支撑结构原理样机,并进行了展开功能试验与验证。研究结果表明:预紧拉索对结构刚度的影响较大,配置预紧拉索后结构刚度提高了约2.01倍;固有频率对杆件材料密度和弹性模量、弦杆及斜腹杆尺寸参数较为敏感;研制的原理样机展开平稳、顺畅,验证了结构设计的正确性。研究结果为模块化可展开天线的基础研究及工程应用提供了理论参考和技术支撑。

摘要：The problem of adaptive robust control is addressed for a class of neutral delay systems. All uncertainties are assumed to be bounded by unknown constants. An improved adaptation law is proposed to estimate the square of these unknown bounds. Then, by making use of the updated values of the squared unknown bounds, an adaptive controller is designed to make the solution of the resultant closed-loop system uniformly ultimately bounded. Furthermore, this method avoids chattering and improves the performance. An example is given to illustrate the effectiveness of this method.

摘要：The new filling system is smooth filling without gas gap. It works well in avoiding the generation of defects such as porosity and inclusion. The pouring basin, sprue, runner and the gate of the bolster casting were designed according to the principle of the new filling system. The filling and solidifciation process of the bolster casting were also simulated. It was found that the filling process was smooth, and air entrapment and shrinkage were avoided. Finally, a further validation of the new filling system of bolster casting was carried out in a foundry.

摘要：这篇文章探讨计划全面精炼厂的优化问题的生产。作者提出了混合了整数的优化问题线性编程。模型为优化与加工设备的跑模式的使用有关的全面精炼厂的生产计划考虑主要因素。这个计划的目的是决定哪个在一根给定的地平线的每个时期在每台工艺设备使用的跑模式，满足需求，例如总数，生产和库存的费用被最小化。产生模型能被认为是一个跑模式能生产并且消费超过一个产品的一个概括缩放许多的问题。产生优化问题大尺寸、 NP 难。作者建议了基于产生的算法为解决感兴趣的优化问题把 branch-and-price (BP ) 称为的列。算法的模型和实现在这篇文章详细被描述。计算结果验证建议模型和答案方法的有效性。

摘要：光氧化还原催化是一种在温和条件下实现可持续有机转化、建立绿色化学产业的有效方法.光氧化还原/过渡金属双催化C–N能够获得大量有价值的材料、药物和多功能的精细化学品.通过在共价有机骨架上(COF)精确构建单原子活性位点不仅能提高催化性能,而且有助于对其构效关系的理解.本文发展了一种锚定Ni单原子的COF(Ni SAS/TD-COF).利用XANES和EXAFS研究了过渡金属镍的配位环境.Ni SAS/TD-COF催化剂在温和的条件下实现了芳基溴与胺的可见光催化C–N交叉偶联反应.该异质催化体系对于缺电子、富电子和中性基团的33种底物均能得到良好的产率.异质Ni SAS/TD-COF催化剂可以很容易地从反应混合物中回收.这项工作对于合理设计COF基光催化剂用于有机物转化提供新思路.

摘要：在这份报纸，有 Euler 方法获得的非线性的发生率的一个分离流行模型的动态行为被讨论，它能在合适的系统参数条件下面展出周期的运动和混乱行为。Codimension -- 分离流行病的二分叉当模特儿，把强壮的回声与 1:1 联系了， 1:2 强壮的回声， 1:3 强壮的回声和 1:4 强壮的回声，被使用分叉定理和地图的正常形式方法分析。而且，一个追踪的控制器被设计以便消除分离流行模型，的混乱行为以便疾病逐渐地消失。最后，数字模拟被阶段肖像，为在 3 尺寸空格的二个不同变化参数的最大的 Lyapunov 代表图，分叉图， Lyapunov 代表的计算和动态反应获得。他们不仅说明建议结果的有效性，而且显示有趣、复杂的动态行为。