摘要：Cryobioprinting has tremendous potential to solve problems to do with lack of shelf availability in traditional bioprinting by combining extrusion bioprinting and *** order to ensure the viability of cells in the frozen state and avoid the possible toxicity of dimethyl sulfoxide(DMSO),DMSO-free bioink design is critical for achieving successful cryobioprinting.A nontoxic gelatin methacryloyl-based bioink used in cryobioprinting is composed of cryoprotective agents(CPAs)and a buffer *** selection and ratio of CPAs in the bioink directly affect the survival of cells in the frozen ***,the development of universal and efficient cryoprotective bioinks requires extensive *** first compared two commonly used CPA formulations via experiments in this *** show that the effect of using ethylene glycol as the permeable CPA was 6.07%better than that of *** datasets were obtained and four machinelearning models were established to predict experimental *** predictive powers of multiple linear regression(MLR),decision tree(DT),random forest(RF),and artificial neural network(ANN)approaches were compared,suggesting an order of ANN>RF>DT>*** final selected ANN model was then applied to another *** reveal that this machine-learning method can accurately predict the effects of cryoprotective bioinks composed of different *** also suggest that the formulations presented here have *** findings are likely to greatly accelerate research and development on the use of bioinks for cryobioprinting.

摘要：针对传统多目标模型预测控制(MPC)权重系数设计复杂的问题,运用分层控制的思想,提出一种无权重系数的多目标优化模型预测控制策略。利用MPC控制算法可直接控制交流量这一优势,在两相静止坐标系下推导双馈感应发电机(DFIG)转子电流、定子电流和定子功率的参考方程和预测方程。最后进行传统多目标MPC控制策略和无权重系数多目标MPC控制策略下的对比仿真实验。仿真结果显示,相比于传统多目标控制策略,所提控制策略的动态响应速度更快,并可改善系统的稳态性能。

摘要：为提高基于EOG的眼动信号分类算法精度,改进基于EOG的人—机交互系统性能,提出了一种基于曲线拟合(curve fitting)与支持向量机(SVM)的眼动信号分类算法(CF-SVM),并设计了新的实验范式,增加了"扫视保持"环节。该算法采用曲线拟合方法进行特征提取,在此基础上,使用SVM分类器对眼动信号进行分类。实验室环境下,对9名眼部活动正常的受试者进行了眼动数据采集与识别,CF-SVM算法的平均分类准确率达到98.3%,与其他几种眼动识别方法相比较,其平均正确率分别提升了9.4%、5.9%、1.0%。实验结果表明,CF-SVM算法在眼动信号识别中表现了良好的性能,具有高的分类精度和鲁棒性。

摘要：介绍325/95R24全钢载重子午线轮胎的设计。结构设计:外直径1 222 mm,断面宽315 mm,行驶面宽度225 mm,行驶面弧度高7.5 mm,胎圈着合直径610 mm,胎圈着合宽度230 mm,断面水平轴位置(H_(1)/H_(2))1.124,胎面采用大块混合花纹设计,花纹深度15.5mm,花纹饱和度60.86%,花纹周节数71。施工设计:胎面采用大分层结构,1^(#)和2^(#)带束层采用3+9+15×0.22W钢丝帘线,3^(#)带束层采用5×0.30HI钢丝帘线,胎体采用0.25+6+12×0.225HT钢丝帘线,采用两鼓一次法成型机成型、热板式硫化机硫化。成品性能试验结果表明,轮胎的充气外缘尺寸、强度性能和耐久性能均达到相应的设计和国家标准要求。