基于生成少数类技术的深度自动睡眠分期模型

针对现阶段可用睡眠脑电数据皆为类不平衡小数据集，深度学习模型的直接迁移应用所取得的分期效果较差的问题，分别从数据集重构和模型训练优化两方面入手，提出可用于少量类不均衡原始睡眠脑电数据集的深度自动睡眠分期模型。首先，从减少决策域的角度对修改的生成少数类过采样技术（MSMOTE）进行改进，并将其用于数据集中少数类的生成；然后，用重构后的数据集对模型作预激活处理。15折交叉验证得出总体精度和宏F1值分别为86.73%和81.70%。应用改进后的MSMOTE重构的数据集对模型作预激活，可使最小类的F1值由45.16%增至53.64%。实验表明，模型可实现对少量原始睡眠脑电数据的端到端学习，总体分类效果优于近年高水平模型，适用于配备远程服务器的分体式便携睡眠监测设备。     

人工堆山工程对周边环境影响数值模拟研究

对软土地基上的拟建堆土工程进行了有限元计算,探讨了当堆土高度较高时引起周边土体的沉降和水平位移,并通过超孔隙水压力消散时间分析堆土引起的沉降固结达到稳定所需的时间,得出了一些有参考价值的结论。     

DDC桩法在盐渍土地区楼房地基处理中的应用

针对盐渍土地区的工程特性,采用DDC桩法处理湿陷、松胀性盐渍土地基,并对施工工艺方案进行了分析,施工结果表明,DDC桩法能消除盐渍土地区的湿陷性,同时又能够提高地基的承载力及复合特性,是一种有效的地基处理方法,在盐渍土地区地基处理中应用DDC桩法具有可行性和实用性。     

软土地基条件下桥台受力分析及病害诊治

分析了软土地基作用下桥台受力情况,对于桥台产生的病害原因进行深入分析,总结软基桥台稳定的影响因素,并提出具体处理方案,针对此类情况从设计及施工角度提出有效的措施。     

Estimation of target station data using satellite data and deep learning algorithms

In this study, an innovative model has been developed for wind speed estimation through the Deep Learning method using hourly wind speed data from the measurement stations of the General Directorate of Meteorology in Van and Hakkari provinces in Turkey in conjunction with simultaneous satellite images from Eumetsat. Obtained satellite images were used during the introduction of the model, while wind speed data were used at the output stage. As a result of the findings, it was found that 85% accuracy performance could be achieved to provide sufficient insight for systems that are widely established worldwide. The model, developed as a result of the study, eliminates the need to install wind measuring stations for any region on earth within the satellite field in terms of determining wind potential. Since the field of view of the Meteosat 7 satellite covers the whole of Eastern Europe, it was determined that it could predict a high rate of up to 6 hours later by the method used in image analysis. The systems to be controlled with this method will be able to examine the weather events instantly at each point in the satellite field of view and make more accurate decisions. Also, companies will be able to perform a more detailed and rapid field scan compared to existing limited methods, and reduce initial investment costs and operating costs in terms of renewable energy resources investments.     

Pressure Combined with Ischemia/Reperfusion Injury Induces Deep Tissue Injury via Endoplasmic Reticulum Stress in a Rat Pressure Ulcer Model

Pressure ulcer is a complex and significant health problem in long-term bedridden patients, and there is currently no effective treatment or efficient prevention method. Furthermore, the molecular mechanisms and pathogenesis contributing to the deep injury of pressure ulcers are unclear. The aim of the study was to explore the role of endoplasmic reticulum (ER) stress and Akt/GSK3β signaling in pressure ulcers. A model of pressure-induced deep tissue injury in adult Sprague-Dawley rats was established. Rats were treated with 2-h compression and subsequent 0.5-h release for various cycles. After recovery, the tissue in the compressed regions was collected for further analysis. The compressed muscle tissues showed clear cellular degenerative features. First, the expression levels of ER stress proteins GRP78, CHOP, and caspase-12 were generally increased compared to those in the control. Phosphorylated Akt and phosphorylated GSK3β were upregulated in the beginning of muscle compression, and immediately significantly decreased at the initiation of ischemia-reperfusion injury in compressed muscles tissue. These data show that ER stress may be involved in the underlying mechanisms of cell degeneration after pressure ulcers and that the Akt/GSK3β signal pathway may play an important role in deep tissue injury induced by pressure and ischemia/reperfusion.     

面向任务口语理解研究现状综述

口语理解是对话系统重要的功能模块，语义槽填充和意图识别是面向任务口语理解的两个关键子任务。近年来，联合识别方法已经成为解决口语理解中语义槽填充和意图识别任务的主流方法，介绍两个任务由独立建模到联合建模的方法，重点介绍基于深度神经网络的语义槽填充和意图识别联合建模方法，并总结了目前存在的问题以及未来的发展趋势。     

Performance of a pavement foundation system based on the partial compensation of masses method

The system of the partial compensation of masses in the lacustrine zone of the Mexico Basin has been conceptualized, developed, used and improved over the past five decades as a foundation alternative for different types of roadways. This kind of foundation has been used in highways and runways built on lacustrine soils to reduce the settlement that can affect the service and operation conditions of those structures. In the construction of the new Mexico City International Airport in the Texcoco Lake area, various alternatives for runway foundations were evaluated through different test sections that were constructed to identify which of them would yield an adequate transfer of stress and prevent excessive total and differential deformations of the soil deposits. In this work, the behavior of the test section of the system of the partial compensation of masses, built in the Texcoco Lake area, is studied. An exploration campaign was performed; it consisted of different field and laboratory tests to determine the stratigraphic profile and the index and mechanical properties of the soil strata. Numerical models were applied using the finite element software PLAXIS 2D to analyze the behavior of the test section and to determine the maintenance frequency required to preserve the functionality of future runways. To validate the capability of the numerical models to properly simulate the stress-strain behavior of the test section, a comparative analysis was performed between the data obtained from the instrumentation installed on the test section and the results obtained from the finite element software. Once the numerical models were calibrated, the medium- and long-term behaviors of the test section were predicted, and the evolution over time of its surface geometry and transverse slopes were obtained.     

深层优质碎屑岩储层全生命周期分析方法论

油气勘探领域的深层是指沉积盆地中埋深在3 500~4 500 m及以深的地层。在含油气盆地的深层碎屑岩储层中，优质储层是重要的勘探目标。优质储层具有大量孔隙，其形成与沙或砂岩的沉积条件、埋藏方式、区域温压场、膏盐岩效应等多种因素有关。通过系统研究全球不同区域不同时代不同类型深层碎屑岩储层，提出优质深层碎屑岩储层的全生命周期研究方法，即从储层形成演变的全部时间出发，将深部储层的形成过程划分为早期剥蚀搬运沉积阶段、中期埋藏阶段、中期或/和晚期改造阶段，从全生命周期的尺度分阶段综合分析深层碎屑岩储层的形成及演化过程，推演在地质历史时期中的优质储层演化时序及发育阶段、分布位置。     

供热站主厂房工艺布置和结构分析

由于工艺布置和建筑造型的需要,供热站主厂房设计变得相当复杂与繁琐,文中通过工程实例对其进行分析,表明工艺之间相互配合、在充分利用平面和竖向空间基础上、能够达到工艺顺畅和结构抗震性能良好的统一。