G-凸空间内G_F-优化对应的极大元和抽象经济平衡(英文)

设I是有限或无限指标集 .引入了涉及集值映象F∈Ukc(Y ,X)的一类映拓扑空间X到广义凸空间 (Yi,Γi)的GF 优化映象 ,其中Y=∏i∈IYi是广义凸空间 (Yi,Γi)的乘积空间 .在广义凸空间的非紧设置下 ,证明了GF 优化映象族的极大元存在定理 .作为应用 ,对具有GF 优化对应的定性对策和抽象经济 ,在广义凸空间的非紧设置下建立了某些新的平衡存在性定理 .这些定理改进 。

局部G - 凸一致空间内的聚合不动点和具有U - 优化对应的广义对策平衡(英文)

应用作者得到的一个聚合不动点定理 ,在局部G -凸一致空间内对具有无限多个经济人 ,具有非紧策略空间和具有U - 优化对应的定性对策和广义对策 ,证明了某些平衡存在性定理 .这些定理改进和推广了文献中某些已知结果 .

成对点云对应关系优化的点云配准算法

针对点云配准过程中存在的迭代次数多、易收敛到局部最优、配准时间长等问题,提出一种基于成对点云对应关系优化的点云配准方法。首先利用快速特征直方图(FPFH)与特征优化生成初始的对应关系;然后通过检查对应点之间是否满足最邻近原则得到初始的对应点集,再对初始的点集进行L2范数比值判别,基本选择出正确对应关系的对应点集,最后通过交替优化计算点云的变换矩阵,实现点云的精确配准。实验结果表明,与传统算法相比,该算法配准速度快,配准精度较高,并且对重叠度低、噪声大的点云具有很好的稳健性。

基于双分支融合学习和二次图结构优化的点云配准算法

目的:为了明确建模非结构化点云所蕴含的图结构以及缓解深度图卷积造成的匹配模糊。方法:首先,在局部邻域中构建富含中心点特征和邻居点特征信息的代理点。针对获得的代理点,采用自适应投票的方式学习代理点间的图结构。其次,将包含局部结构信息的节点特征与逐节点独立地学习到的特征融合,从而挖掘每个节点潜在的判别性特征。最后,通过最大化两个邻接矩阵之间的一致性来达到优化对应矩阵的目的,实现更精确的配准性能。结果:大量的对比实验结果显示,本文构建的模型具有最佳的配准效果,其中,在不可见类别的局部到局部的噪声点云配准的误差为RMSE(R)=0.4273,RMSE(t)=0.0035,CCD=0.0832。结论:基于双分支融合学习和二次图结构优化的匹配算法显著地提高了点云配准的性能。

OPTIMAL CONTRACTS IN TWO-ECHELON SUPPLY CHAIN UNDER ASYMMETRIC INFORMATION AND NONLINEAR DEMAND

The challenge for supply chain management is to create appropriate supply chain contracts so as to optimize the system performance. To examine the role of asymmetric information in a two-echelon supply chain system and derive supply chain contracts to deal with existing asymmetric information, a two level supply chain model including one Supplier and one retailer under the demand of price elasticity is developed. By using the principalagent principle and the optimal control theory, three types of supply chain contract, i. e. , a wholesale pricing contract, a two-parameter linear and a two-parameter nonlinear contracts are obtained. In these contracts, the Supplier has asymmetric information about the retailer cost structure. Simulation results show that the two-parameter contracts are more effective strategies to achieve supply chain coordination.

Applied research of correspondence analysis method in waste tailings reservoir heavy metal pollution monitoring points optimization

In order to optimize monitoring points and monitoring factor, the relationshipbetween pollutants and soil sample were established by correspondence analysis.Thestudy results show that the reflecting monitoring points and monitoring factors in thegraphic on the same factor axis can clearly express the intrinsic link between pollutantsand monitoring points and distribution characteristics.To determine the main monitoringpoint and the main monitoring indicators can reduce and optimize the number of monitoringpoints under the premise of ensuring the typical and representative of monitoring data.Using the correlation of pollutants can reduce the number of monitoring indicators and improvethe effectiveness of data collection.

eBay平台吹响中国汽配品牌集结号，汽配出海前景广阔

2019年12月3日,第十五届法兰克福上海国际汽车零配件、维修检测诊断设备及汽车用品展览会在上海国家会展中心盛大开幕,此次展会吸引了来自18个国家和地区的超过6000家参展企业,汇聚了大量汽配龙头企业和品牌。作为唯一参展的跨境出口电商平台,eBay召集优质卖家开启“灯塔计划”观展采购活动,不仅有来自中国的卖家,更有来自泰国、马来西亚的国外卖家加入eBay“灯塔计划”国际采购团。