摘要：提出了基于模块化理论的多场景农业机器人,可应用于农业大棚、户外场景等。通过搭载不同的模块化农机设备,实现多种作物的监测、授粉、药物喷洒、采摘等任务,实现了农场自主运行,降低了人工成本。该农业机器人采用悬挂减震系统、独立转向驱动结构和双地形轨道轮设计,可以适应室内平地、轨道、室外农田等多种场景,实现多种运动模态和工作场景的自主切换。针对高精度的底盘机械臂协同运动控制,建立对应的运动学和动力学模型,并根据样机参数分析其控制精度。针对需要遍历目标任务点的工作,提出新型的冗余协同控制策略。试验结果表明,农业机器人样机各项参数均满足工作要求,冗余协同控制策略相比传统的间歇式的效率最多可以提升30%,动力学上的误差也得到数值验证,从数学模型和仿真角度量化了样机参数、遍历效率、控制精度等因素的影响,为进一步的改进和优化提供了指导。试验结果支持机器人在农业场景的设计和实际应用,为农业生产提供高效、精确的解决方案。

摘要：Due to the unique interface and electronic structure,metal/metal oxide composite electrocatalysts have been designed and exploited for electrocatalytic oxygen evolution reaction(OER)in alkaline ***,how to fabricate metal/metal oxides with abundant interfaces and well-dispersed metal phases is a challenge,and the synergistic effect between metal and metal oxides on boosting the electrocatalytic activities is still ***,by controlling the lithium-induced conversion reaction of metal oxides,metal/metal oxide composites with plentiful interfaces and excellent electrical interconnection are fabricated,which can enhance the active sites,and accelerate the mass transfer during the electrocatalytic *** a result,the electrocatalytic oxygen evolution activities of the as-fabricated metal/metal oxide composite catalysts including NiCo/NiCo2O4,NiMn/NiMn2O4 and CoMn/CoMn2O4 are greatly *** catalytic mechanism is also explored using the in-situ X-ray and Raman spectroscopic tracking to uncover the real active centers and the synergistic effect between the metal and metal oxides during water *** functional theory plus U(DFT+U)calculation confirms the metal in the composite can optimize the catalytic reaction path and reduce the reaction barrier,thus boosting the electrocatalytic kinetics.

摘要：在当今世界,电力、能源和安全是人们日常生活的基本要求。为了应对日益增长的能源需求,最终的解决办法是实施可再生能源,然后将其用于人类的安全。可再生能源需要以它们各自正确的方式实施。研究基于压电传感器片的迈步发电装置,并演示了如何利用这些能量实现建筑物疏散照明。我们在传感器的下方和顶部分别固定了木板和可移动网螺栓,利用压电传感器系统,行人可以通过迈步向发电装置施加电能,另外,将硅凝胶粘贴在位于下部木板空洞中的所有传感器顶部。当有人踩到板上时,就会自动施加压力。在木板的顶部和底部设置了一个孔,以便随时调整在底部和顶板之间安装的可移动网螺栓。烟雾传感器用于启动灯光。使用这种设备,我们实现了建筑物疏散路径上的LED灯正常运行。结果表明,这种安全发电的设计和方法具有一定的实用价值,同时也满足了全球对能源的需求。

摘要：Public verification of data integrity is crucial for promoting the serviceability of cloud storage systems. Recently, Tan and Jia （2014） proposed an identity-based public verification （NaEPASC） protocol for cloud data to simplify key management and alleviate the burden of check tasks. They claimed that NaEPASC enables a third- party auditor （TPA） to verify the integrity of outsourced data with high efficiency and security in a cloud computing environment. However, in this paper, we pinpoint that NaEPASC is vulnerable to the signature forgery attack in the setup phase; i.e., a malicious cloud server can forge a valid signature for an arbitrary data block by using two correct signatures. Moreover, we demonstrate that NaEPASC is subject to data privacy threats in the challenge phase; i.e., an external attacker acting as a TPA can reveal the content of outsourced data. The analysis shows that NaEPASC is not secure in the data verification process. Therefore, our work is helpful for cryptographers and engineers to design and implement more secure and efficient identitv-based nublic alldit^n~ .~cheme~ far clnne] ~tnr^q~

摘要：本文对中国聚变工程实验堆(CFETR)氦冷陶瓷增殖(HCCB)包层进行热工安全分析。采用大型反应堆瞬态分析程序RELAP5对HCCB包层建模,并进行稳态分析和假设事故的模拟。计算结果表明,CFETR HCCB包层在真空室内氦气泄漏和增殖区盒内氦气泄漏事故中均未出现结构材料熔化,同时各部分的压强变化情况均未超出设计阈值,包层系统在事故发生后均能有效快速地排出余热。CFETR HCCB包层的设计满足热工安全方面的要求。

摘要：This paper presents a further improved Production Activity Control Architecture to deal with the complexity of information by creating Sub-Producers and Sub-Movers which will not only give a better control at workstation level but also reduce load on the Dispatcher. It also makes an analysis of the basic and improved PAC (Production Activity Control) Architecture in the Control System for Integrated Manufacturing. The PAC Architecture and the improvement will further enhance the flexibility and adaptability of the architecture in the ever changing environment of the Shop Floor Control (SFC) Systems.

摘要：Radio frequency identification (RFID) is a contactless form of automatic identification and data capture (AIDC) technology. This paper explores the use of RFID in the new field of manufacturing automation and quality control. This paper consists of five parts. The first part gives a brief background and introduction of technology. The proposed use of RFID technology in the field of manufacturing automation and quality control is discussed in second part. The third part covers its use in the field of warehouse management system. Part four is a local review and analysis of RFID technology in manufacturing and warehousing which would support the potential use of this technology locally at China. The last part of paper gives concluding remarks about the RFID technology with recommendations of RFID use in these areas.

摘要：哈萨克族创世神话内容丰富,艺术特色鲜明.本文对哈萨克族的传世神话《迦萨甘创世》和《神与灵魂》进行深层次的阐释,探讨了创世神话所蕴含的哲学思想及其对哈萨克哲学思想观念形成的影响.

摘要：This article proposes a new transceiver design for Single carrier frequency division multiple access(SCFDMA)system based on discrete wavelet transform(DWT). SCFDMA offers almost same structure as Orthogonal frequency division multiple access(OFDMA)with extra advantage of low Peak to Average Power Ratio(PAPR). Moreover,this article also suggests the application of Walsh Hadamard transform(WHT)for linear precoding(LP)to improve the PAPR performance of the system. Supremacy of the proposed transceiver over conventional Fast Fourier transform(FFT)based SCFDMA is shown through simulated results in terms of PAPR,spectral efficiency(SE)and bit error rate(BER).

摘要：针对传统建筑物提取方法难以有效描述遥感图像细节特征,导致复杂场景下道路、树木及建筑物之间分割边界不清晰等问题,提出了一种基于多尺度特征融合空洞卷积ResNet(Multiscale-feature Fusion Dilated Convolution ResNet,MFDC-ResNet)模型。首先,为了获取遥感图像建筑物更大范围的特征信息,在深度残差网络中引入空洞卷积增大特征提取的感受野,以捕捉更丰富的多尺度细节特征;其次,为了增强空洞卷积中心点对图像局部区域特征的表达能力,利用3×3卷积核提取遥感图像的中心点区域特征,引入更多的中心点空间先验信息;最后,利用空间金字塔池化模型对不同尺度空洞卷积特征进行融合,获取不同尺度的遥感图像建筑物的上下文信息。在WHU遥感图像数据集上的实验表明,平均交并比mIoU达到0.820,召回率Recall达到0.882。提出算法不仅提高了分割精度,而且有效克服了道路、树木等因素的干扰,得到了较清晰的建筑物边界。