摘要：A successful mechanical property data-driven prediction model is the core of the optimal design of hot rolling process for hot-rolled strips. However, the original industrial data, usually unbalanced, are inevitably mixed with fluctuant and abnormal values. Models established on the basis of the data without data processing can cause misleading results, which cannot be used for the optimal design of hot rolling process. Thus, a method of industrial data processing of C-Mn steel was proposed based on the data analysis. The Bayesian neural network was employed to establish the reliable mechanical property prediction models for the optimal design of hot rolling process. By using the multi-objective optimization algorithm and considering the individual requirements of costumers and the constraints of the equipment, the optimal design of hot rolling process was successfully applied to the rolling process design for Q345B steel with 0.017% Nb and 0.046% Ti content removed. The optimal process design results were in good agreement with the industrial trials results, which verify the effectiveness of the optimal design of hot rolling process.

摘要：根据纤维总体积掺量为1%的混杂纤维混凝土四点弯曲试验和切口梁弯曲试验的荷载–挠度曲线、韧性指数I_n和纤维混凝土能量吸收值D_n等计算指标,结合试验力学模型以及弯曲韧性评价指标的含义,对两种试验方法下荷载–挠度曲线的精密度进行方差分析;对混杂纤维混凝土的韧性指数I_n、纤维混凝土能量吸收值D_n的离散程度进行统计分析。研究表明:对于低掺量混杂纤维混凝土而言,四点弯曲试验与切口梁弯曲试验的荷载–挠度曲线的精密度一致;采用纤维混凝土能量吸收值D_n作为弯曲韧性评价指标,其离散程度较小,所需要的试件数量较少,通过等效抗弯拉强度f_(eq1)、f_(eq2)可以建立弯曲韧性指标与强度指标之间的联系;选用切口梁法的试验方式和纤维混凝土能量吸收值D_n更适宜于低掺量混杂纤维混凝土弯曲韧性研究,有利于以韧性为基础的结构设计方法的发展。

摘要：在万物互联的大背景下,实现系统的安全可信始终是最核心的目标。随着国产信息系统建设的不断深入,实现系统的安全可信已经成为最迫切的需求。为了解决工业互联网的多接口数据互联和数据安全问题,设计了一款基于飞腾嵌入式E2000处理器的安全网关设备。实现了3G/4G/5G无线VPN路由功能,同时支持以太网、RS232/485串口,CAN口接入,并支持Wifi/蓝牙通信以及GPS/北斗定位。通过分析VLAN协议原理,基于RTL8367SC芯片实现了内置网络交换机功能;融合基于RG200U的5G模块挂载方法,形成了网关的内置5G交换机系统,进一步解决了多通道数据互联的问题。通过分析飞腾安全处理器平台架构规范(Phytium Security Platform Architecture,PSPA),设计了网关的安全可信固件制作方法,保证了启动过程执行的所有代码都是安全可信的。通过搭建测试环境进行测试验证,测试结果表明,该系统实现了多种接口的数据互联,并基于多项E2000芯片内置安全加密算法,使安全性方面得到了较大提升。

摘要：Hydrogen,regarded as a promising energy carrier to alleviate the current energy crisis,can be generated from hydrogen evolution reaction(HER),whereas its efficiency is impeded by the activity of ***,effective strategies,such as strain and interfacial engineering,are imposed to tune the catalysis performance of novel two-dimensional(2D)phosphorus carbide(PC)layers using first-principle *** findings show that P site in pristine monolayer PC(ML-PC)exhibits higher HER performance than C ***,constructing bilayer PC sheet(BL-PC)can change the coordinate configuration of P atom to form 3-coordination-P atom(3-co-P)and 4-coordination-P atom(4-co-P),and the original activity of 3-co-P site is higher than the 4-co-P *** an external compressive strain is applied,the activity of the 4-co-P site is enhanced whereas the external strain can barely affect that of 3-co-P ***,the graphene substrate enhances the overall activity of the BL-PC because the graphene substrate optimizes the?GH*value of 4-co-P site,although it can barely affect the HER activity of 3-co-P site and *** desirable properties render 2 D PC-based material promising candidates for HER catalysts and shed light on the wide utilization in electrocatalysis.

摘要：针对伪码连续波跟踪测量雷达,提出了一种信号捕获参数设计方法.该方法利用快速傅里叶变换(FFT)捕获算法将接收信号和本地再生信号的时域相关运算转换成频域的频谱相乘运算,从而大大减少捕获时间,并引入非相参积累以提高对弱信号的检测能力,通过Tong判决算法保证系统总的虚警概率满足要求.在给定的技术指标下对非相参积累次数和Tong判决算法进行了参数设计.仿真结果表明,所提出的信号捕获参数设计方法可以满足低信噪比下预定的检测概率和虚警概率要求.

摘要：A series of novel indole derivatives were designed and synthesized and their inhibitory activity against B-Raf and HepG2 cell were also described. Among them, compounds 7a and 7b exhibited excellent potency, which showed the potential for further research as lead compounds.

摘要：文中提出一种RBF网设计的进化优选算法 ,该算法能设计出满足给定学习精度的最小RBF网络 ,从而使所得到的RBF网具有较好的泛化能力。我们以煤灰软化温度预测为例 ,介绍了如何将该算法应用于动力配煤过程的状态预测建模。我们还把ESA算法与另外 2种最常见的RBF网设计方法 ,即聚类方法和OLS算法作了比较 ,结果表明 ,用进化优选算法设计的RBF网模型具有最好的泛化能力。

摘要：为给铁路梁桥A形超高桥墩构造尺寸的拟定提供参考,对该类桥墩的概念设计进行研究。从构造细节出发,分析对A形墩受力特性及经济指标有重要影响的设计参数,并利用ANSYS参数化设计建模平台对主要设计参数的合理取值进行优化设计分析,在此基础上总结各种墩高条件下A形墩的设计步骤和设计原则。研究结果表明:A形桥墩适用于墩高大于100m的铁路桥梁;调整A形墩单柱墩体坡率和两支腿底部横向中心间距可在不增加墩身混凝土体量的同时,显著提高A形墩横向刚度;A形墩墩顶、支腿顶、支腿底截面尺寸对A形墩经济性影响显著,应根据构造和强度要求优化设计。

摘要：为了实现快速的热轧工艺优化设计,基于工业数据的钢铁材料性能预测引起了研究者的极大关注,对利用机器学习进行钢铁材料轧制过程性能预测的研究进展进行了梳理。首先介绍了钢铁材料轧制过程性能预测常用的主流机器学习算法,其中包括人工神经网络、模糊神经网络、支持向量机、随机森林、智能优化算法等。其次,分别对钢铁材料轧制过程性能预测建模方法研究进展和模型应用情况进行了综述。最后,对钢铁轧制过程性能预测研究进行了展望,指出了数据质量的改善、小样本数据建模、建模数据加密、模型可解释性研究、钢铁材料组织预测和利用模型进行有效的工艺优化设计等可能发展方向。

摘要：针对供电综合保护系统功能和硬实时特性的要求,使用Cotex-M3内核MCU,基于μC/OS-Ⅲ实时操作系统,应用库开发方式完成了供电综合保护器的设计。根据系统要求,将保护功能划分为数据采集处理、保护和GUI显示等10个优先级不同的应用任务。基于优先级对应用任务进行管理,任务间通过信号量、任务消息队列和事件标志组等内核对象实现通信和同步,从而达到系统实时运行。经系统仿真监测实验,表明基于μC/OS-Ⅲ的保护程序设计能可靠实现多任务系统的实时运行。通过对μC/OS-Ⅲ系统任务的监测功能的合理配置,可对软件系统运行状态进行监测,并发现软件运行细节的不足,有利于后期优化升级改进。