摘要：海洋石油平台上部组块和钻机模块分别单独使用空气压缩机制造仪表气已有多年经验。文章从降本增效理念出发,将上部组块和钻机模块的仪表气系统进行一体化工艺设计,详细阐述了仪表气一体化工艺设计原则和注意事项;通过引入高压氮气工艺流程,优化密封隔离性仪表气罐尺寸,解决了因密封隔离性仪表气罐尺寸较大而影响平台总体布置的难题。

摘要：Multi-wall carbon nanotube filled shape memory polymer composite(MWCNT/SMC)possessed enhanced modulus,strength,and electric conductivity,as well as excellent electrothermal shape memory properties,showing wide design scenarios and engineering application *** thermoelectrically triggered shape memory process contains complex multi-physical mechanisms,especially when coupled with finite deformation rooted on micro-mechanisms.A multi-physical finite deformation model is necessary to get a deep understanding on the coupled electro-thermomechanical properties of electrothermal shape memory composites(ESMCs),beneficial to its design and wide *** into consideration of micro-physical mechanisms of the MWCNTs interacting with double-chain networks,a finite deformation theoretical model is developed in this work based on two superimposed network chains of physically crosslinked network formed among MWCNTs and the chemically crosslinked *** intact crosslinked chemical network is considered featuring with entropic-hyperelastic properties,superimposed with a physically crosslinked network where percolation theory is based on electric conductivity and electric-heating *** model is calibrated by experiments and used for shape recoveries triggered by heating and electric *** captures the coupled electro-thermomechanical behavior of ESMCs and provides design guidelines for MWCNTs filled shape memory polymers.

摘要：不同醇法条件制备的花生蛋白品质不同,导致蛋白性质出现差异,产品的功能特性与用途发生改变。以花生粕为原料,采用响应面法以产品得率为指标,优化条件为:体积分数75.00%、浸提温度35.00℃、浸提时间55.45 min,该条件下产品得率87.82%,蛋白含量58.02%(D1蛋白)。以蛋白含量为指标,优化条件为:体积分数67.12%、浸提温度42.02℃、浸提时间58.28 min,此时产品得率86.08%,蛋白含量61.10%(D2蛋白)。与对照组花生粕(CP)相比,D1、D2的蛋白含量分别提高5.72%、8.80%,乳化性、起泡性、持水性、持油性及凝胶性提高;D1、D2蛋白产品粒径减小,溶于水溶液中的清蛋白、伴花生球蛋白Ⅰ含量增加,表面疏水性增加,界面张力下降,花生蛋白的功能特性改变。

摘要：Anterior cruciate ligament(ACL)injuries of the knee are one of the most common and serious athletic *** widely used cortical suspension fixation buttons for ligament reconstruction are permanent implants,particularly those made from conventional steel or titanium *** this study,a biodegradable Zn-0.45Mn-0.2Mg(ZMM42)alloy with the yield strength of 300.4 MPa and tensile strength of 329.8 MPa was prepared through hot *** use of zinc alloys in the preparation of cortical suspension fixation buttons was proposed for the first *** 35 d of immersion in simulated body fluids,the ZMM42 alloy fixation buttons were degraded at a rate of 44μm/a,and the fixation strength was retained(379.55 N)in the traction ***,the ZMM42 alloy fixation buttons exhibited an increase in MC3T3-E1 cell viability and high antibacterial activity against Escherichia coli and Staphylococcus *** results reveal the potential of biodegradable zinc alloys for use as ligament reconstruction materials and for developing diverse zinc alloy cortical suspension fixation devices.

摘要：With the development of high-speed railways in China,more than 2000 high-speed trains will be put into *** and efficiency of railway transportation is increasingly *** have designed a high availability quadruple vital computer (HAQVC) system based on the analysis of the architecture of the traditional double 2-out-of-2 system and 2-out-of-3 *** HAQVC system is a system with high availability and safety,with prominent characteristics such as fire-new internal architecture,high efficiency,reliable data interaction mechanism,and operation state change *** hardware of the vital CPU is based on ARM7 with the real-time embedded safe operation system (ES-OS).The Markov modeling method is designed to evaluate the reliability,availability,maintainability,and safety (RAMS) of the *** this paper,we demonstrate that the HAQVC system is more reliable than the all voting triple modular redundancy (AVTMR) system and double 2-out-of-2 ***,the design can be used for a specific application system,such as an airplane or high-speed railway system.

摘要：介绍了一种建筑空调电能预测方法。空调电能占建筑总能耗的50%以上,空调电能的预测有利于可再生能源的安装容量预测和电力系统的负荷预测。采用遗传算法自适应搜索Seq2Seq模型的最优超参数,由此生成输出序列。通过与已有常见预测方法进行对比,证实了GA-Seq2Seq模型在MAE、RMSE 2和R等指标中表现优异。此外,还研究了GA-Seq2Seq模型的超参数和分类标签设置效果。

摘要：In this paper, a new illumination system with ultra high performance (UHP) lamp is proposed for projection display. Parabolic reflector (PR) and compound parabolic retro-reflector (CPR) were jointly used to collect and collimate the light generated from UHP lamp. A polarization converter system (PCS) was used to increase the light efficiency of the projection display system. A beam transformer between PCS and 2f imaging systems was directly used to make the illumination meet the requirement of projection display system. With the consideration of the loss of reflection, the light efficiency in this projection display system was estimated to be 15.6%.

摘要：随着人类活动越来越频繁,城市土地利用类型的转变对植被覆盖度产生了一定的影响。以山东省青岛市和日照市为研究区域,利用2017年、2020年和2023年sentinel-2生成的土地利用数据及PIE-Engine生成的植被覆盖度影像,通过土地利用转移矩阵、土地利用类型对应植被覆盖度的变化矩阵方法,分析2017-2023年青岛市和日照市土地利用时空变化特征及其对植被覆盖度的影响。结果表明:(1)2017-2023年青岛市和日照市不透水面面积显著增加,耕地面积逐年减少。青岛市共增加不透水面面积614.661 km^(2),耕地面积减少了924.225 km^(2);日照市不透水面面积增加350.715 km^(2),耕地面积减少了496.897 km^(2)。(2)2017-2023年青岛市和日照市高植被覆盖度区域和中植被覆盖度区域总体呈下降趋势,而低植被覆盖度区域呈现上升的趋势。青岛市高植被覆盖度区域减少206.700 km^(2),日照市减少1028.255 km^(2);青岛市低植被覆盖度区域增加537.476 km^(2),日照市增加83.343 km^(2)。(3)耕地和不透水面的面积变化显著影响了植被覆盖度。

摘要：运用机器视觉检测密集、小尺寸杆端关节轴承存在特征信息少以及滑动球面的高可变性,导致识别不精确进而影响生产效率的问题;由此,提出一种深度学习目标检测算法模型,首先为了使网络携带更多语义信息,引入Space-to-depth Convolution(SPD-Conv)无步长卷积模块改进Backbone网络;提出Multilevel Feature Fused SPD(MFSPD)深度特征融合模块重新设计Neck网络,提升对小尺寸目标的特征信息提取能力与检测精度;在Head网络增加一个P4小尺寸检测头,使用加权K-means算法在数据集上获取先验框,增大先验框与特征图层匹配度,加快模型收敛速度;接着引入置信度传播聚类分析算法Confidence Propagation Cluster(CP-Cluster)做后处理,优化预测框置信度与检测速度;然后最后在自制数据集、TLESS数据集以及COCO数据集上评估算法性能,该目标检测算法在自制数据集与T-LESS数据集上mAP@.5达到96.8%与93.6%,在COCO数据集上mAP为55.7%,实验结果表明算法检测精度与特征信息提取能力效果显著。

摘要：A new method to obtain supercontinuum(SC) source for multiplex coherent anti-stokes Raman scattering (CARS) microscopy is proposed. The nonlinear propagation in photonic-crystal fibers (PCF) of femtosecond pulse laser with central wavelength at 800.9 nm is studied with scalar wave theory. Based on the incident laser power and dispersion of PCF, super broadband source for multiplex CARS microscopy is designed.