地区电网分布式光伏接纳能力校验

以扬中电网110kV某分区为算例,采用2020年预测数据,提出一种新型的分布式光伏接纳能力校验策略,在高负荷强光照、低负荷强光照、高负荷弱光照和低负荷弱光照4种典型特征场景下详细分析分布式光伏接入对分区电网的影响,研究其对分布式光伏的接纳能力,该策略能够较好地运用于分布式光伏发电接入电网的适应性分析.     

Road Extraction from High Resolution Remote Sensing Image based on Shape Analysis with Gestalt Theory

Simulating the psychological experience of human vision,a road extraction model based on the format tower is proposed to extract the road in the high resolution remote sensing image from the perspective of morphology.Firstly,based on the spectral and texture information,the suspected road targets are extracted by using segmentation technology.Then these targets are classified according to their reliability and extract the road targets for each category.Finally,three types of identified road information are verified and merged,and the continuous smooth road extraction results are obtained.Experiments on real high resolution images show that the results are consistent with the visual perception of the human eye,and the overall classification accuracy is higher,indicating that the algorithm is effective and feasible and has good use value.     

基于“IPv6+”的智能IP网络方案

随着第4次工业革命的到来,人类社会正逐步迈向万物互联的智能时代。智能时代需要更加自动化、智能化的IP网络,基于“IPv6+”的SRv6、BIERv6等技术是使能新一代IP网络的关键基础。全面阐述了“IPv6+”的技术内涵,结合华为在智能 IP 网络解决方案上的创新和思考,介绍了“IPv6+”在极简连接、SLA 保障、专网体验、质量感知和云网一体等多个解决方案场景的关键技术与典型应用,助力5G与云业务发展。     

纳米纤维素-可聚合低共熔溶剂离子导电弹性体的制备及性能研究

本研究采用紫外光引发原位聚合法将丙烯酸-氯化胆碱合成的可聚合低共熔溶剂（polymerizable deep eutectic solvents,PDES）与纤维素纳米纤丝（cellulose nanofibril,CNF）气凝胶结合,并引入植酸以增强CNF与PDES之间的结合作用,制得含有丰富的共价键和非共价键（氢键）的离子导电弹性体,通过多种现代仪器分析测试其性能。结果表明,该离子导电弹性体在机械性能（应力和应变分别可达0.38 MPa和1378%）、热稳定性、抗冻性、离子电导性（离子电导率可达3.9 mS/m）和紫外屏蔽性方面具有明显优势,同时具有一定的抗疲劳性和弹性,且基于其组装的柔性应变传感器对人体运动表现出快速、稳定、可逆的信号响应。     

活性染料日晒牢度影响因素及改进措施

日晒牢度是纺织品检测的一个重要指标,某些活性染料染色或印花织物常会出现日晒牢度不合格的情况。文章分析了影响活性染料日晒牢度的各种因素,并提出改进活性染料日晒牢度的相应措施。     

共生视域下河北工业遗产数字化保护系统研究

文中从数字化的深度和广度两个方面,将工业遗产数字化保护划分为4个阶段,即基础信息化、应用数字化、全面系统化和共生视域下的智慧生态化。随后围绕共生视域,从数字化保护、文化遗产等方向进行了研究,发现可以考虑以数字孪生技术为依托,实现工业遗产数字化保护。基于此,文中搭建了一款基于数字孪生的工业遗产数字化保护系统,该系统包含感知层、数据层、运算层、功能层、应用层等。最后,以该系统为依托,构建了河北工业遗产综合服务体系,希望能为工业遗产的数字化保护提供一定的借鉴与参考。     

视觉显著性纹理—色彩特征融合的图像目标分类

针对图像目标分类,提出了一种显著性纹理特征.考虑到显著目标图像在纹理特征表征上的优势,在目标显著性图像提取的基础上进一步提取视觉显著性纹理特征.进而将该视觉显著性纹理特征同HSV色彩特征进行融合,形成图像目标融合特征,输入至后端分类器中进行分类.多类别的交叉实验证明,基于该融合特征的目标分类方法能够较为准确的对图像目标进行分类,在SIMPLIcity图像数据集上平均分类正确率达到84.84％,在Corel图像集上平均分类正确率为85.05％,优于基于单一分类特征的图像分类方法.     

二氧化碳加氢制甲醇铜基催化剂性能的研究进展

二氧化碳（CO₂）加氢制甲醇对于解决CO₂排放和能源紧缺问题具有重要意义,催化剂的研究是这项技术的关键。铜基催化剂因高效廉价而被广泛研究,但目前的生产效率离实现工业化仍有距离。本文针对铜基催化剂,首先探讨了活性中心的存在形式,然后从活性组分负载量、载体、助剂、制备方法及条件、预处理条件这5个方面,分别分析其对催化剂的活性、选择性以及稳定性等的影响,以期为CO₂高值转化为甲醇的铜基催化剂的制备和筛选提供参考。按照广泛接受的双位点机理可知,CO₂转化率与铜表面积密切相关,甲醇选择性与强碱位点含量密切相关。因此,各方面因素通过影响催化剂比表面积、铜表面积、铜分散度、碱性位点、铜与载体的协同作用等物理化学参数,进而影响CO₂转化率与甲醇选择性。     

Surface Tension and Density of Bismuth Germanate Melts as a Function of Composition and Temperature

The surface tension and density of x Bi₂O₃–(1− x )GeO₂ (BGO) melts have been measured systematically from their respective melting points up to around 1480 K within 0.25≤ x ≤0.86. With the addition of Bi₂O₃, the density of this system increased smoothly with a positive curvature. Deviation of molar volume from ideality of this system melts decreased firstly, past a minimum at about x =0.4, and then increased. Partial molar volumes of Bi₂O₃ and GeO₂ have also been calculated based on the measured density data and compared with those of a binary bismuth borate system. On increasing the content of Bi₂O₃, the surface tension of BGO melts increased slowly when x <∼0.40, past a maximum at about x =0.50, and then decreased rapidly. In addition, the temperature coefficient of surface tension remained positive within the lower content range of Bi₂O₃, changed sign from positive to negative at about x =0.38, and then was almost independent of the composition within the measured temperature range when the Bi₂O₃ content was increased further.     

影响生活用纸吸收性能的因素

介绍了生活用纸吸收性能的重要性,并从纤维、打浆、起皱、干燥、压花和结构6个因素阐述了对生活用纸吸收性能的影响。