基于蕴涵算子族L-λ-R_0的模糊推理FMT三Ⅰ算法

提出了基于蕴涵算子族L-λ-R0的模糊推理的思想,这将有助于提高推理结果的可靠性。针对蕴涵算子族L-λ-R0已给出的FMP模型[1]的三Ⅰ支持算法、α-三Ⅰ支持算法进一步给出了模糊推理的FMT模型的三Ⅰ支持算法、α-三Ⅰ支持算法。     

并行通讯格雷码多圈旋转编码器和S7-200型PLC在石灰炉提升机上的应用

本文系统分析了各种旋转编码器和S7-200型PLC的特点,解决了用S7-200型PLC将格雷码翻译成二进制码等难题,选用并行通讯格雷码旋转编码器、S7-200型PLC和中文TD200人机界面组成控制系统,成功实现石灰炉提升机自动控制,控制系统必将在小规模精度定位领域中得到广泛应用。     

基于GPIO的永磁同步电机模型预测转矩控制

在永磁同步电机模型预测转矩控制(model predictive torque control,MPTC)中,由于目标函数控制变量的量纲不同,为了在代价函数中选取最优的权重系数,提出一种改进高斯变异鸽群算法(Gaussian mutation pigeon-inspired optimization algorithm, GPIO)实现权重系数自整定。首先,基于代价函数最小化原则设计PIO的目标函数,用电流id、iq脉动误差均方根评价权重系数。其次,在传统高斯变异算子的基础上引入自适应调整动态参数实现变异。仿真和实验结果表明,将改进后的算法应用于永磁同步电机模型预测转矩系统,能在较少的迭代次数内整定出最优的权重系数,极大地降低了转矩误差和电流谐波畸变率。     

In Situ Deformation Topology of COFs with Shortened Channels and High Redox Properties for Li–S Batteries

Covalent organic frameworks (COFs) with various topologies are typically synthesized by selecting and designing connecting units with rich shapes. However, this process is time-consuming and labour-intensive. Besides, the tight stacking of COFs layers greatly restrict their structural advantages. It is crucial to effectively exploit the high porosity and active sites of COFs by topological design. Herein, for the first time, inducing in situ topological changes in sub-chemometric COFs by adding graphene oxide (GO) without replacing the monomer, is proposed. Surprisingly, GO can slow down the intermolecular stacking and induce rearrangement of COFs nanosheets. The channels of D- [4+3] COFs are significantly altered while the stacking of periodically expanded framework is weakened. This not only maximizes the exposure of pore area and polar groups, but also shortens the channels and increases the redox activity, which enables high loading while enhancing host-guest interactions. This topological transformation to exhibit the structural features of COFs for efficient application is an innovative molecular design strategy.     

Reliability Analysis Method on Repairable System with Standby Structure Based on Goal Oriented Methodology

This paper presents a reliability analysis method on repairable system with standby structure based on goal oriented (GO) methodology. Firstly, a new combination of GO operator, which is composed of a new logical GO operator named Type 18A operator and a new auxiliary GO operator named Type 20 operator, is created to represent standby mode. The availability formula of standby equipment with translation exception is deduced based on Markov process theory. Then, the application method of combination of GO operator for standby mode and the analysis process of repairable system with standby structure based on GO method are proposed. Thirdly, this new combination of GO operator is applied in availability analysis of the hydraulic oil supply system of power‐shift steering transmission. Finally, the results obtained by the new GO method are compared with the results of fault tree analysis, Monte Carlo simulation, GO methods using Type 2 operator and Type 18 operator to represent the standby mode, respectively. And the comparison results show that this new GO method is applicable and reasonable for reliability analysis of repairable system with standby structure. All in all, this paper provides guidance for reliability analysis of repairable systems with standby structure. Copyright © 2015 John Wiley & Sons, Ltd.     

一种视频运动目标精确分割新算法

针对视频图像中单个运动目标的分割问题,提出了一种基于Kirsch边缘算子的视频运动目标分割算法,该算法将Kirsch算子检测到的边缘作为主分割信息,运动矢量场作为次要分割信息;首先利用双重尺度的运动矢量场进行累加和滤波处理来获得辅助分割信息;然后将Kirsch算子的模板分解为差值模板和公共模板以提高边缘的抗噪性;最后用自适应状态标记的方法将边缘信息和运动矢量信息相融合来准确地分割运动目标;实验结果表明该方法分割比较精确。     

二元三角插值多项式的收敛阶

构造了一个二元组合型三角插值多项式算子,使该算子对任意的关于变量ｘ、ｙ均以２π为周期的连续函数ｆ（ｘ,ｙ）都能在全平面上一致地逼近,且具有最佳收敛阶。     

表面贴装式永磁同步电机弱磁控制策略的研究

研究表面贴装式永磁同步电机的弱磁控制策略,提出了一种修正电流设定值的方法.该方法由两部分组成:弱磁区域的确定和设定电流修正值的计算.电机运行所在的弱磁区域由恒转矩曲线方向和电流调节器输出电压递减方向之间的夹角来确定,输出电压的递减方向信息通过梯度下降法计算得到.设定电流修正值的大小根据该弱磁区域内转矩、电压变化量的方向...     

一种基于积分投影的人眼定位方法

文章研究了人脸识别中的人眼定位这一重要环节。将经过预处理的人脸图像先通过积分投影变换法进行人脸定位,在定位后的人脸区域内用一定的矩形框搜索,给方框内黑色像素进行计数,当黑色像素个数达到某个比例时,将其标记为人眼位置侯选处。然后将小方框适当扩大,用canny算子算出人眼的边缘轮廓,并在候选位置中进一步确定人眼位置。实验结果表明本文采用的方法简单易行,具有较高的准确率和较强的光照鲁棒性。