摘要：为保障电力系统正常运行,设计发电机绝缘故障位置自动化在线监测诊断系统。采集传感器采集发电机实时运行数据,通过CAN总线连接到遥测终端内的主控芯片;遥测终端利用主控芯片连接开关量输入、模拟输入、数据存储芯片等,并利用其内部逻辑处理模块对发电机实时运行数据进行处理、故障诊断以及预警后,将其发送到用户端的上位机内呈现给用户,实现发电机绝缘故障位置自动化在线监测诊断。实验结果表明,该系统具备较为稳定的运行能力,可准确对发电机故障位置进行在线监测诊断并预警。

摘要：习近平总书记在黄河流域生态保护和高质量发展座谈会提出“要坚持以水定城、以水定地、以水定人、以水定产”。为给甘肃省、黄河流域乃至北方缺水地区的生态保护和高质量发展,以及贯彻落实“四水四定”提供理论指导和参考,以甘肃省黄河流域为北方缺水地区代表,分析了存在的主要水问题,以及面临的新形势和所处的战略地位,剖析了甘肃省黄河流域水资源管理的现状,提出了新形势下甘肃省黄河流域“四水四定”创新管理的战略对策,包括开展顶层设计、强化水资源刚性约束、推进关键技术研发和工程建设、建立健全管理体制和机制,以及推进开展试点建设等。北方缺水地区实施“四水四定”的核心在于要把水资源作为刚性约束,优化生态、能源和粮食发展格局,建立与水资源条件相协调的人口、城市、灌溉和产业发展规模,提升水与“城-地-人-产”的适配性,从根本上促进人水和谐发展。

摘要：The current goal is to create a set of portable terminals with GPS/BD2 dual-mode satellite positioning, vital signs monitoring and wireless transmission functions. The terminal depends on an ARM processor to collect and combine data related to vital signs and GPS/BD2 location information, and sends the message to headquarters through the military CDMA network. It integrates multiple functions as a whole. The satellite positioning and wireless transmission capabilities are integrated into the motherboard, and the vital signs sensors used in the form of belts communicate with the board through Bluetooth. It can be adjusted according to the headquarters' instructions. This kind of device is of great practical significance for operations during disaster relief, search and rescue of the wounded in wartime, non-war military operations and other special circumstances.

摘要：气化灰渣是煤气化转化过程产生的主要副产物,特征分析、炭灰分离和资源化利用是降低其环境危害性、提高煤炭资源利用率的有效途径。论文系统阐释了煤炭气化灰渣的孔隙结构、表面形貌、矿物组成等特征,这有助于根据物化性质设计资源化利用方案;深入分析了气化灰渣的分级、重选、电选、浮选、化学分选等分离技术,多技术联用可提高炭、灰分选效率;全面综述了气化灰渣的资源化利用途径,硅碳复合材料逐步成为气化灰渣大规模资源化的趋势。研究为促进气化灰渣的循环利用起到支撑作用。

摘要：设计了一种可同时满足多种工作需要的便携式试块。该试块可替代多种标准试块 ,方便现场检验 。

摘要：A series of sulfenimine cephalosporin sulfoxide derivatives （Ta-v） were designed, synthesized and evaluated for their inhibitory activity against TEM-1 and cephalosporinase in cell-free systems. Some of the tested compounds showed enhanced inhibitory activity against class C β-lactamase cephalospor- inase compared with the tazobactam. The most promising compounds 7c and 7n （IC50 ~ 7.6 and 8.6 μmol/L, respectively） were further investigated in combination with cefradine against a variety of clinical isolated fi-lactamase-producing bacterial strains.

摘要：针对野外环境下无人机空对地火灾预警任务中火点目标成像尺度小、特征信息不明显,以及全尺寸火点探测神经网络计算开销较大、难以适配机载计算核心算力的问题,设计了一种轻量化野外火点识别卷积神经网络。通过融合CSP-DarkNet 53与GhostNet,在确保特征提取精度与效率的前提下减少了网络内部冗余结构;通过引入注意力机制,强化网络对小尺度火点语义特征的感知能力;基于最小距离交并比构建损失函数,对网络训练进行监督,增强算法对火点的识别精度。实验结果表明:改进后的算法平均火点识别精度提高了3.3%、准确率提高了6.77%、召回率提高了6.71%,计算参数量下降了31.3%。算法能够在无人机端载核心上部署并可完成火点精确、高效识别。

摘要：从基于案例推理和认知心理学的思想出发,提出包含问题情境、求解情境和解情境的设计情境概念,并建立基于案例的工业设计情境模型。该模型包含工业设计情境组织框架和情境推理模型。在此基础上以数控机床为对象,对该模型从情境三个方面进行知识表达,初步建立一个基于案例的计算机辅助工业设计系统,并应用到设计实践中。

摘要：In this work, a facile strategy is proposed to construct stretchable electronics based on agarose hydrogels. The hot agarose solution is casted onto a template with patterned Ag nanowires, endowing agarose hydrogel with patterned conductive surface. After further heating treatment, Ag nanowires can be embedded into the agarose hydrogel, which improves the stability of Ag pattern and has no obvious e ffect on the conductivity of hydrogels. The agarose hydrogel with patterned Ag nanowires is certi fied to be an e ffective stretchable electrode to record the motion of joints, which has great potential applications in the field of wearable devices.

摘要：In order to improve the frequency response and anti-interference characteristics of the smart electromechanical actuator(EMA)system,and aiming at the force fighting problem when multiple actuators work synchronously,a multi input multi output(MIMO)position difference cross coupling control coordinated strategy based on double‑closed-loop load feedforward control is proposed and *** this strategy,the singular value method of return difference matrix is used to design the parameter range that meets the requirements of system stability margin,and the sensitivity function and the H_(∞)norm theory are used to design and determine the optimal solution in the obtained parameter stability region,so that the multi actuator system has excellent synchronization,stability and *** the same time,the mathematical model of the integrated smart EMA system is *** to the requirements of point-to-point control,the controller of double-loop control and load feedforward compensation is determined and designed to improve the frequency response and anti-interference ability of single ***,the 270 V high-voltage smart EMA system experimental platform is built,and the frequency response,load feedforward compensation and coordinated control experiments are carried out to verify the correctness of the position difference cross coupling control strategy and the rationality of the parameter design,so that the system can reach the servo control indexes of bandwidth 6 Hz,the maximum output force 20000 N and the synchronization error≤0.1 mm,which effectively solves the problem of force fighting.