摘要：近年来,前馈补偿技术得到广泛研究,其可以提高系统的控制精度.对于非最小相位系统,很难给出干扰和可测信息的直接关系,此外,频率的不确定性以及估计值之间的耦合会导致大量冗余参数的运算.现有的自适应方法存在估计值之间的耦合,会增加干扰估计误差收敛性能分析难度.而基于干扰观测器控制(DOBC)通过调节控制器和观测器参数,可以同时对多源不确定进行补偿和抑制.基于此,提出一种分步式观测器设计方法.首先设计一种辅助滤波器和观测器对未知频率正弦干扰参数进行估计,同时给出干扰的等效形式;然后利用估计值构造观测器得到输入干扰状态,从而将这类非线性系统的干扰抵消问题转换为线性系统的观测器设计问题;最后通过李雅普诺夫定理和数值仿真验证所提出方法的有效性.

摘要：针对翟镇选煤厂空气穿流压滤机回收浮选精煤过程中精煤物料被反吹回精矿桶时因喷溅造成的精煤损失现象,从人、机、料、法、环五个方面针对性地找出了影响返料喷溅的原因,基于BIM,提出返料缓冲的关键技术,在此基础上,结合翟镇选煤厂现场实际情况,设计了返料缓冲箱;返料缓冲箱的使用与改进,有效解决了返料喷溅现象,使得这部分浮选精煤全部顺利返回到精矿桶中,极大地改善了现场的工作环境,每天可降低2 t精煤损失量,1 a可创造经济效益85.8万元。

摘要：Background:Renal artery stenosis (RAS) is always associated with abnormalities in renal microvascular perfusion (RMP).However,few imaging methods can simultaneously evaluate the degree of luminal stenosis and ***,this study will aim to evaluate the feasibility of using contrast-enhanced ultrasound (CEUS) for assessing both RAS and RMP to achieve a one-stop assessment of patients with suspected renovascular hypertension. Methods:This will be a single-center diagnostic study with a sample size of *** with chronic kidney disease (CKD) and suspected of having resistant hypertension will be *** with Stages 1–3 CKD will undergo CEUS and computed tomography (CT) angiography (CTA).Values obtained by CEUS and CTA for diagnosing low-grade (lumen reduced by <60%) and high-grade (lumen reduced by ≥60%) RAS will be ***,all patients will also undergo radionuclide *** diagnostic value for RAS will be assessed by the receiver operating characteristic curve,including the accuracy,sensitivity,specificity,positive predictive values,negative predictive values,and area under the *** correlation analysis will be performed to assess the association between CEUS findings for RMP and glomerular filtration rate measured by a radionuclide imaging method. Conclusion:The data gathered from this study will be used to evaluate the feasibility of expanding clinical applications of CEUS for evaluation of patients with suspected renovascular hypertension.

摘要：针对某型装有液力自动变速器的重型载重汽车,设计了电控系统的TCU硬件电路实现方案,在其内部固化了各种控制程序,包括换挡控制、闭锁离合器控制、液力缓速器充排油控制、换挡品质控制等;采用分层、分模块方式开发了电控系统的软件。制定了重型车两参数自动换挡策略,结合台架试验,最终实现功能验证。结果表明,所设计的电控系统软硬件能够实现对自动变速箱的综合控制,并且能够改善换挡质量。

摘要：Accurate and fast performance estimation is necessary to drive design space exploration and thus support important design decisions. Current techniques are either time consuming or not accurate enough. In this paper, we solve these problems by presenting a hybrid method for multimedia multiprocessor system-on-chip （MPSoC） performance estimation. A general coverage analysis tool GNU gcov is employed to profile the execution statistics during the native simulation. To tackle the complexity and keep the analysis and simulation manageable, the orthogonalization of communication and computation parts is adopted. The estimation result of the computation part is annotated to a transaction accurate model for further analysis, by which a gradual refinement of MPSoC performance estimation is supported. The implementation and its experimental results prove the feasibility and efficiency of the proposed method.

摘要：目的 傣族民居建筑具有独特的造型特点与艺术价值,从家具设计角度对其元素进行传承与应用,实现傣族民居元素在民宿家具设计中的创新。方法 以地域性民居建筑——西双版纳傣族民居建筑为对象,通过分析西双版纳傣族传统民居建筑特征,提取其造型和装饰要素后,利用形状文法进行造型和装饰的分析,演化结果形成新的造型和装饰素材库,利用库中元素并结合约束规则进行方案初步设计,得到相关设计成果后,运用模糊评价法对设计方案进行评价,选出初步设计方案中的最优解并进行融合设计,得出最终设计成果。结论 通过设计推导验证了形状文法在民宿家具设计中的可行性。结合设计师主观意向和客观方法指导,辅助设计师在家具设计中更科学、全面地获得相关的设计结果,能够保证民宿家具外观既具有原始元素形态特征的同时又符合现代审美的新方案产生,对传承和创新地域文化具有积极意义。

摘要：针对通信拓扑突变的不确定异构多智能体系统,将拓扑突变等效为切换拓扑问题,进而设计一种基于领导者-模型-跟随者匹配的分布式自适应协同控制方法,实现领导者-跟随者输出一致性.首先,提出局部输出跟踪误差概念,将领导者-跟随者输出一致性问题转化为相邻智能体局部输出一致性问题;然后,针对系统参数已知的情况,进行分布式标称协同控制器设计,实现参考模型-领导者匹配和跟随者-参考模型匹配,以保证通信拓扑突变下领导者-跟随者输出一致性;进而,针对系统参数未知的情况,进行分布式自适应协同控制器设计,实现通信拓扑突变下跟随者输出对领导者输出的渐近跟踪.所设计的控制方法不依靠全局信息即可保证所有智能体系统闭环稳定及跟随者对领导者的输出一致性.最后,通过一个仿真案例验证了所设计的控制方案的有效性.

摘要：针对一级多传感器数据融合,开发了一个算法级测试床STE-One,支持对包括带反馈在内的各种数据融合结构进行测试和评估。简单介绍了STE-One测试床的体系结构,详细描述了它实现算法级测试和置换能力的一些关键方法,包括分层设计模型、算法排序与数据池技术等。

摘要：A prototype thick-GEM-based cooling storage ring external-target experiment(CEE) time projection chamber(TPC) is constructed and tested with the pulsed ultraviolet laser beams. The results indicate that the prototype TPC has a good performance in three-dimensional track resolution. In X direction the position resolution is about 0.2 mm, and in Y direction the position resolution is about 0.5 mm. The results also determine that the energy resolution is about 5.4%, which achieve the requirements of the CEE experiment and can be used to study the nuclear state equation and the quantum chromo dynamics.

摘要：在分析某型涡扇发动机试验数据的基础上, 给出了涡扇发动机在不同转速下频率特性的变化, 得到了涡扇发动机数学模型参数摄动的权函数, 设计了一个满足给定鲁棒性能指标的控制器。通过试验验证了涡扇发动机控制系统的鲁棒性能。