一类参数优化问题的通有稳定性

在Bale纲和稠密的意义下，仅要求目标函数关于参数连续，证明了一类含参数优化问题的通有稳定性。     

非紧超凸空间中新的GMS-KKM定理及其对抽象经济的应用

在非紧超凸度量空间中建立了S为集值映射的新的广义度量S—KKM定理。作为应用,获得了非紧超凸度量空间中的转移开覆盖的KyFan匹配定理,Fan-Browder重合定理和极大元定理。最后,研究了非紧超凸度量空间中新的定性对策和抽象经济的平衡存在定理。     

最小子集线路划分法在优化拉萨市公交线路设计和数据存储中的应用研究

规定了最小子集线路划分法规则,并利用最小子集线路划分法优化拉萨市公交线路的数据库存储,给公交线路的数据查询、数据存储和线路调整带来很大便利,将公交系统管理和优化线路引向全新的方向.     

Extracting representative subset from extensive text data for training pre-trained language models

This paper investigates the existence of a representative subset obtained from a large original dataset that can achieve the same performance level obtained using the entire dataset in the context of training neural language models. We employ the likelihood-based scoring method based on two distinct types of pre-trained language models to select a representative subset. We conduct our experiments on widely used 17 natural language processing datasets with 24 evaluation metrics. The experimental results showed that the representative subset obtained using the likelihood difference score can achieve the 90% performance level even when the size of the dataset is reduced to approximately two to three orders of magnitude smaller than the original dataset. We also compare the performance with the models trained with the same amount of subset selected randomly to show the effectiveness of the representative subset.     

水冲助沉预应力管桩的工艺控制及其效果

通过工程实例，论证静压管桩可根据压桩力有选择地进行水冲助沉穿越密实砂层，并通过静载试验对比证明其效果。     

急性运动对T淋巴细胞及其亚群的影响与运动免疫的关系

大量的文献资料表明T淋巴细胞及其亚群和人体运动免疫调节有重要的关系.T淋巴细胞亚群中的辅助性T细胞(CD4 )和抑制性T细胞(CD8 )是机体重要的免疫调节细胞,可增强或抑制其他免疫细胞的活性.本文对急性运动引起T淋巴细胞及其亚群的变化,以及这种变化和运动免疫的关系,对免疫功能的影响,以及T淋巴细胞及其亚群在运动免疫中作用的机制进行了论述.     

运动锻炼对淋巴细胞及亚群、细胞因子影响的meta分析

目的：系统评价运动锻炼对机体外周血淋巴细胞、T细胞亚群及炎症细胞因子的影响,并根据不同运动处方的效果量,为人们制定提高免疫能力的最优运动处方提供依据。方法：计算机检索中国知网、万方、EBSCOhost、Science Direct、Sports Discus、Springer Link、PubMed和Web of Science各数据库,检索期限均从1997年1月至2017年5月,收集运动锻炼影响机体外周血淋巴细胞及亚群和细胞因子含量的实验性研究,应用Cochrane偏倚风险评估工具,使用Revman5.3对纳入研究进行质量评价,stata12.0软件进行统计分析。结果：纳入研究文献19篇,文献质量A级3篇、B级9篇、C级7篇。meta分析结果：敏感性分析剔除文献后,运动锻炼使淋巴细胞含量提高,效应量为0.35;运动锻炼能使T、B细胞含量提高,效应量为0.92、0.51,但对NK细胞增加不明显（P>0.05）;运动锻炼能使CD4⁺/CD8⁺的比值、CD4⁺含量升高,效应量为1.09、0.71,但对CD8⁺T细胞的含量未出现明显变化（P>0.05）;运动锻炼后外周IL-6含量明显降低,效应量为0.73,外周TNF-a含量提高,效应量为0.55。结论：运动锻炼能显著提高T、B细胞、CD4⁺T细胞、CD4⁺/ CD8⁺的比值和TNF-a的含量,但NK细胞和CD8⁺T细胞的影响不大,这不仅增强了机体的抗感染能力,而且提高了机体的免疫应答和免疫调节功能;运动锻炼后外周血IL-6含量显著降低,有利于其聚集骨骼肌中消除因运动性微损伤引起的炎症反应。     

Towards understanding residual and dilated dense neural networks via convolutional sparse coding

Convolutional neural network (CNN) and its variants have led to many state-of-the-art results in various fields. However, a clear theoretical understanding of such networks is still lacking. Recently, a multilayer convolutional sparse coding (ML-CSC) model has been proposed and proved to equal such simply stacked networks (plain networks). Here, we consider the initialization, the dictionary design and the number of iterations to be factors in each layer that greatly affect the performance of the ML-CSC model. Inspired by these considerations, we propose two novel multilayer models: the residual convolutional sparse coding (Res-CSC) model and the mixed-scale dense convolutional sparse coding (MSD-CSC) model. They are closely related to the residual neural network (ResNet) and the mixed-scale (dilated) dense neural network (MSDNet), respectively. Mathematically, we derive the skip connection in the ResNet as a special case of a new forward propagation rule for the ML-CSC model. We also find a theoretical interpretation of dilated convolution and dense connection in the MSDNet by analyzing the MSD-CSC model, which gives a clear mathematical understanding of each. We implement the iterative soft thresholding algorithm and its fast version to solve the Res-CSC and MSD-CSC models. The unfolding operation can be employed for further improvement. Finally, extensive numerical experiments and comparison with competing methods demonstrate their effectiveness.     

立一画之法——《石涛画语录》中心思想与文化指向

以“立一画之法”为核心,剖析了石涛的“墨海抱负”和师法自然的中国山水画创作理念。如“借古以开今”、“法自我立”、“搜尽奇峰打腹稿”和“笔墨当随时代”等观点。     

"民工荒"现象产生的原因及解决途径

近两年我国沿海许多地区出现了“民工荒”现象。文章从农民工劳动权益、城乡二元结构、劳动密集型产业转移和产业升级以及教育体制和劳动者素质的角度,分析了产生这一现象的原因,并提出了解决的途径。