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标准号: JB/T 9630.2-2024

摘要： 本文件规定了汽轮机铸钢件A型脉冲反射式超声检测要求，描述了相应的检测方法和对缺陷进行分级的方法，规定了检测的质量等级要求、对缺陷进行检测和评定的要求、检测记录和检测报告。本文件适用于碳钢、合金钢和非奥氏体不锈钢厚度不超过600mm的电站汽轮机用铸钢件超声检测。

标准号: JB/T 14515-2024

摘要： 本文件规定了热收缩光纤接续管的技术要求，描述了相应的试验方法，规定了检验规则以及标志、包装、运输和贮存。本文件适用于热收缩光纤接续管的制造。

关键词： CCD   E-glass   Climate-resilient   Sustainability  

摘要： The objective of this investigation is to evaluate the durability of dune sand mortar containing display e-glass waste (DEGW) in severe Saharan environments, chemical attacks, or other factors that can cause cementitious materials to deteriorate at long- term. The aim is to use DEGW powder as a partial replacement for dune sand in various mortar mixtures and assess the performance of hardened mortar in terms of ultrasonic pulse velocity, dynamic elasticity modulus, compressive strength, and flexural strength and sportivity. The study also examines the influence of the curing period and different climatic conditions in curing environments, such as those in Algeria's Sahara region. The Response Surface Methodology (RSM) was used to adjust the e-waste glassy mortar, with the statistical tool Central Composite Design (CCD) approach. The hydration of cement compounds was monitored using differential thermal analysis (DTA), thermogravimetric analysis (TGA), Differential Scanning Calorimetry (DSC), and X-ray diffraction (XRD). The DEGW was replaced in 5% increments from 0% to 20%. The results showed that the glassy dune sand mortar exhibited the highest properties at 20% incorporation after 365 days of severe climatic conditions. The feasibility of the proposed quadratic model was recommended for the five responses by RSM, in which the coefficient of determination (R2) ranges from 0.93 to 0.97, showing the model's high significance. For structural display e-glassy dune sand mortar, display glass E-waste can replace 20% of dune sand, which improves all durability and environmental sustainability. Furthermore, the DSC, TGA / DTA results and XRD analysis showed that the < 0.08 mm class exhibited good pozzolanic behaviour, and the specimens significantly improved as curing periods increased.

摘要： 小儿肾积水是一种常见的泌尿系统疾病,其发病率较高,对患儿的健康和生活质量有着重要影响.了解肾积水的成因、症状、诊断方法以及预防措施,对于家长来说十分重要.

关键词： 波分复用   光交换   阵列波导光栅路由器   复用器/解复用器  

摘要： 【目的】以N×N矩阵形式构成的阵列波导光栅路由器(Array Waveguide Grating Router， AWGR)具有光学并行和波长路由能力，能在不同信道上同时传输N路信号，具有扩展性好、延时低和频带宽等优势，结合可调谐光源能实现快速光交换，是下一代光交换数据中心网络的潜在技术方案之一。为了解决现有AWGR在实际应用中存在的串扰大、有额外的耦合损耗、偏振敏感、损耗非均匀性大等问题，进一步扩大数据中心规模和提升数据交换速度，本文分别对4×4通道，12×12通道的AWGR进行了研究。【方法】通过仿真软件进行基本设计参数的计算，分析研究了AWGR设计流程，并采用光束传播法(Beam Propagation Method， BPM)进行仿真模拟。同时，采用在平板波导和条形波导连接处加入锥形波导taper结构，增大输入、输出波导间距等方法进行性能优化。【结果】仿真结果显示良好的性能参数：4×4 AWGR插入损耗-0.714dB，串扰-35.556dB，损耗非均匀性1.907dB；12×12 AWGR插入损耗-0.294dB，串扰-36.019dB，损耗非均匀性3.428dB。将设计好的器件流片制作进行性能测试。测试结果表明：4×4 AWGR插入损耗-2.586dB，串扰-29.473dB，损耗非均匀性1.921dB；12×12 AWGR插入损耗-3.692dB，串扰-23.874dB，损耗非均匀性3.873dB。【结论】本文研究在串扰和损耗非均匀性等方面进行了性能优化，为后续设计迭代，进一步提升性能参数积累了经验。

关键词： 附塔管线   管道腐蚀检测   铁磁管道脉冲涡流检测   自驱动壁压式内检测机器人  

摘要： 因工作条件恶劣，石化装置中附塔管线常出现面积型腐蚀、结垢等缺陷，从而导致管道失效，给工厂正常运作与生产带来巨大风险，需要定期对管道内部进行安全检测。该文基于附塔管线的损伤模式与结构特点，针对人工检测痛点，设计一套搭载多通道脉冲涡流检测系统的自驱动壁压三段式柔性管道内检测机器人，该机器人具有良好的运动居中和稳定支撑性能。为探究脉冲涡流检测系统在工业管道中的检测效果，建立铁磁管道脉冲涡流磁测有限元模拟模型，并通过测厚实验验证可行性。最后，结合集成完备的内检测机器人样机，以直径DN200的带弯头样管作为试验对象，将机器人检测结果同超声测厚结果对比。结果表明：该管道机器人能够对工业管道壁厚面积型腐蚀缺陷实现高灵敏度、全覆盖和无损伤内检测，测厚检测误差控制在±7%以内，能快速筛查可疑腐蚀位置，可在相关行业设备检测中进一步推广。

关键词： 药品库   温度监测   无线传感器网络   数据融合   无迹卡尔曼滤波   极限学习机  

摘要： 针对药品库中上层空间温度分布不均匀、环境温度信息采集中单传感器传输数据误差大、可靠性低可能导致实时监测效果不佳的问题，提出了一种基于分层分簇无线传感器网络实时融合策略。该策略分为三层，其中在底层，利用改进的无迹卡尔曼滤波器对传感器采集的温度数据进行预处理；在中间层，每个簇头作为一个局部融合中心，通过并行快速对角阵权系数协方差交叉融合算法(PFDCI)对预处理的数据进行融合；在顶层的全局融合中心提出一种融合卷积神经网络和多策略天鹰算法优化改进极限学习机的网络结构处理局部融合数据，实现对药品库内环境温度的精准监测。仿真结果表明，该策略的局部融合算法与全局融合算法对测试样本的均方根误差、平均绝对误差和平均绝对误差分别为13.5%、3.3%、0.18%和1.6%、1.3%、0.07%，完全满足现场测量需求。经验证，该融合策略在保证数据融合的稳定性和准确性的同时，减少了外部干扰，提高了药品库环境温度监测的精确度。

关键词： Electrolytic manganese residue   Chitosan   Cr   Adsorption   CCD  

摘要： A novel adsorbent was obtained by using a typical solid waste electrolytic manganese residue (EMR) and a green material chitosan (CS) for the Cr(VI) removal from the aqueous environment. The tagged mineral phases and elements in the EMR were successfully detected in the synthesized composites according to the XRD and SEM-EDS results. Furthermore, the characteristic peak of metal and hydroxyl group binding appeared at 779 cm(-1), and the Si-O bending vibration at 454 cm(-1) in the FT-IR pattern of the synthesized composites indicating the functional Fe and Mn hydroxyl groups and the silicates in EMR were all successfully grafted onto the CS. This obtained composite showed a high Cr adsorption capacity with a maximum adsorption capacity of 133.64 mgg(-1), and the Cr(VI) removal rate could maintain a high level of 94.6 % after five adsorption-desorption cycles. Its adsorption isotherm matched with the Langmuir model, and the adsorption kinetics followed the pseudo-first-order model. According to the response surface CCD model, the optimal conditions for Cr(VI) removal were pH at 2, contact time at 53.0 min, and initial concentration at 100 mgL-1. For the removal mechanism, Cr(VI) anions could be easily electrostatic adsorbed by -NH3+, or chelated with the Fe and Mn oxides. Meanwhile, partial Cr(VI) (similar to 35.7 %) was reduced into Cr(III) by the abundant hydroxyl group of chitosan on the surface of the as-obtained materials, and then the free Cr(III) could be easily chelated with three chitosan monomers. This work opens up a novel and green methodology to modify chitosan and reuse the solid waste EMR.

关键词： Smart city  

摘要： As part of the activities of the IEEE-GDL CCD working group of physical infrastructure, this whitepaper is intented to be an initial guide to understand the layers, taxonomy of services and best practices for the development of smart buildings. Open standards are claimed in order to increase interoperability between layers and services. Moreover, two buildings in Guadalajara city, one new and another to renew, are described as a proof of concept under development and being part of the strategy to develop the smart city infrastructure based in a master plan. A discussion will be addressed in order to identify the areas of innovation and opportunities for the smart buildings as the contribution of this document. © 2024, CC BY-NC-SA.