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An investigation on stress distribution effect on multi- piezoelectric energy harvesters

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frontiers of Structural and Civil Engineering 2017年第3期11卷 301-307页

作者： hailu YANG Dongwei CAO National Center for Materials Service Safety University of Science and Technology Beijing Beijing China Research of Institute of Highway Ministry of Transport Beijing China

With the fast development of piezoelectric materials and due to its green and renewable characteristics, the piezoelectric energy harvesting technology has been paid more and more attention by pavement engineers. The stress distribution will significantly affect the piezoelectric material performance. In this paper, the effects of multiple piezoelectric elements on the generation of electrical energy and output power are studied. In the case of constant external load, the number of the piezoelectric units does not necessarily produce more energy. When the same multi piezoelectric units work together, if the stress state of the piezoelectric units is different, the total output energy affected by the connection mode. for uneven stress distribution, the optimal output mode is that each of the piezoelectric units rectified before connected in parallel.

关键词： piezoelectric transdUcer uneven stress impedance matching optimal energy output

When optical microscopy meets all-optical analog computing:A brief review

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frontiers of physics 2023年第4期18卷 249-264页

作者： Yichang Shou Jiawei Liu hailu Luo Laboratory for Spin Photonics School of Physics and ElectronicsHunan UniversityChangsha 410082China

As a revolutionary observation tool in life science,biomedical,and material science,optical microscopy allows imaging of samples with high spatial resolution and a wide field of ***,conventional microscopy methods are limited to single imaging and cannot accomplish real-time image *** edge detection,image enhancement and phase visualization schemes have attracted great interest with the rapid development of optical analog *** two main physical mechanisms that enable optical analog computing originate from two geometric phases:the spin-redirection Rytov-Vlasimirskii-Berry(RVB)phase and the Pancharatnam-Berry(PB)***,we review the basic principles and recent research progress of the RVB phase and PB phase based optical *** we focus on the innovative and emerging applications of optical analog computing in microscopic *** analog computing is accelerating the transformation of information processing from classical imaging to quantum *** intersection with optical microscopy opens opportunities for the development of versatile and compact optical microscopy systems.

关键词： optical microscopy optical analog computing all-optical image processing

A New Hadrosauriform Dinosaur from the Early Cretaceous of Gansu Province,China

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Acta Geologica Sinica(English Edition) 2011年第1期85卷 51-57页

作者： YOU hailu LI Daqing LIU Weichang Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 China Gansu Geological Museum Lanzhou Gansu 730010 China Gansu Land and Resources Information Center Lanzhou Gansu 730000 China

A new basal hadrosauriform dinosaur, Xuwulongyueluni gen. et sp. nov., is reported based on an articulated specimen including a complete cranium, almost complete axial skeleton, and complete left pelvic girdle. The specimen is recovered from the Early Cretaceous Yujingzi Basin in the Jiuquan area, Gansu Province of northwestern China. Xuwulong is among the most basal members of hadrosauriform dinosaurs, and distinguished by its unique lower jaw in having a V-shaped rostral end of the dentary in lateral view and a mandibular articular surface which levels with mid-height of the dentary ramus, as well as an enlarged and downturned prepubic process. Including Xuwulong, three basal hadrosauriforms have been discovered from the Early Cretaceous Xinminpu Group in the Mazongshan area, making it an important area to study the origin and early evolution of duck-billed dinosaurs.

关键词： dinosaur hadrosauriform gen. et sp. nov. Early Cretaceous Xinminpu Group Gansu

A preliminary research on wireless cantilever beam vibration sensor in bridge health monitoring

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frontiers of Structural and Civil Engineering 2018年第2期12卷 207-214页

作者： Xinlong TONG Shanglin SONG Linbing WANG hailu YANG National Center for Materials Service Safety Joint USTB-Virginia Tech Lab on Multifunctional Materials University of Science and Technology Beijing Beijing 100083 China Virginia Tech Blacksburg VA 24061 United States

According to specific bridge environment, optimal design piezoelectric cantilever beam structure by using results of theoretical calculations and simulation, verify natural frequencies of piezoelectric cantilever beam and production ability of data by experiment, thus formed a complete set of design method of piezoelectric cantilever beam. Considering natural frequency of vibration and intensity of the beam body, design a new type of piezoelectric cantilever beam structure. Paper analyzes the principle of sensor data acquisition and transmission, design a hardware integration system include signal conversion module, microcontroller module and wireless transmission module, test local read and wireless transmission for the combination structure of cantilever beam and data collection card, experimental verification of the radio piezoelectric vibrating cantilever vibration response is intact, the beam produced signal by vibration, acquisition card converts and wireless transmit data, this proved a good and intuitive linear response in simulation of bridge vibration test. finally, the paper designed a kind of new wireless sensor of vibration cantilever beam, suitable for small bridge health monitoring based on Internet of things.

关键词： piezoelectric cantilever beam bridge natural frequency wireless sensor

Underwater four-quadrant dual-beam circumferential scanning laser fuze using nonlinear adaptive backscatter filter based on pauseable SAf-LMS algorithm

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Defence Technology（防务技术） 2024年第7期37卷 1-13页

作者： Guangbo Xu Bingting Zha hailu Yuan Zhen Zheng He Zhang Ministerial Key Laboratory of ZNDY Nanjing University of Science and TechnologyNanjing 210094China Science and Technology on Electromechanical Dynamic Control Laboratory Beijing 100081China Shanghai Radio Equipment Research Institute Shanghai 201109China

The phenomenon of a target echo peak overlapping with the backscattered echo peak significantly undermines the detection range and precision of underwater laser *** overcome this issue,we propose a four-quadrant dual-beam circumferential scanning laser fuze to distinguish various interference signals and provide more real-time data for the backscatter filtering *** enhances the algorithm loading capability of the *** order to address the problem of insufficient filtering capacity in existing linear backscatter filtering algorithms,we develop a nonlinear backscattering adaptive filter based on the spline adaptive filter least mean square(SAf-LMS)*** also designed an algorithm pause module to retain the original trend of the target echo peak,improving the time discrimination accuracy and anti-interference capability of the ***,experiments are conducted with varying signal-to-noise ratios of the original underwater target echo *** experimental results show that the average signal-to-noise ratio before and after filtering can be improved by more than31 d B,with an increase of up to 76%in extreme detection distance.

关键词： Laser fuze Underwater laser detection Backscatter adaptive filter Spline least mean square algorithm Nonlinear filtering algorithm

A New Specimen of Liaoceratops yanzigouensis(Dinosauria:Neoceratopsia)from the Early Cretaceous of Liaoning Province,China

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Acta Geologica Sinica(English Edition) 2007年第6期81卷 898-904页

作者： YOU hailu Kyo TANOUE Peter DODSON Institute of Geology Chinese Academy of Geological Sciences 26 Baiwanzhuang Road Beijing 100037 China Department of Earth and Environmental Science University of Pennsylvania 240 S. 33rd Street Philadelphia PA 19104-6316 USA School of Veterinary Medicine University of Pennsylvania 3800 Spruce Street Philadelphia PA 19104-6045 USA

A new specimen of basal neoceratopsian dinosaur Liaoceratops yanzigouensis is described. The specimen comes from the Lujiatun Bed of the Lower Cretaceous Yixian formation in Beipiao City of western Liaoning Province, and is represented by a very well preserved three-dimensional partial skull and mandible. It is also the smallest among the three specimens of L. yanzigouensis, and several features in the new specimen, such as the short preorbital length and the round rostroventral orbital rim, can be ontogenetically-related. The superb exposure of the palatal complex may be caused by the removing of its brain by a small predator in the contemporary Jehol Biota.

关键词： Dinosauria Neoceratopsia Early Cretaceous Yixian formation Liaoning Province China

Optimal retrofitting scenarios of multi-objective energy-efficient historic building under different national goals integrating energy simulation,reduced order modelling and NSGA-II algorithm

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Building Simulation 2024年第6期17卷 933-954页

作者： hailu Wei Yuanhao Jiao Zhe Wang Wei Wang Tong Zhang School of Architecture Southeast UniversityNanjingJiangsu Province210096China Key Laboratory of Urban and Architectural Heritage Conservation(Southeast University) Ministry of EducationNanjingChina Department of Civil and Environmental Engineering The Hong Kong University of Science and TechnologyHong KongChina HKUST Shenzhen-Hong Kong Collaborative Innovation Research Institute FutianShenzhenChina

Retrofitting a historic building under different national goals involves multiple objectives,constraints,and numerous potential measures and packages,therefore it is time-consuming and challenging during the early design *** study introduces a systematic retrofitting approach that incorporates standard measures for the building envelope(walls,windows,roof),as well as the heating,cooling,and lighting *** retrofit objectives are delineated based on prevailing Chinese *** retrofit measures function as genes to optimize energy-savings,carbon emissions,and net present value(NPV)by employing a log-additive decomposition approach through energy simulation techniques and NSGA-II,yielding 185,163,and 8 ***,a weighted sum method is proposed to derive optimal solutions across multiple *** framework is applied to a courtyard building in Nanjing,China,and the outcomes of the implementation are scrutinized to ascertain the optimal retrofit package under various *** this retrofit,energy consumption can be diminished by up to 63.62%,resulting in an NPV growth of 151.84%,and maximum rate of 60.48%carbon *** three result values not only indicate that the optimal values are achieved in these three aspects of energy saving,carbon reduction and economy,but also show the possibility of possible equilibrium in this multi-objective optimization *** framework proposed in this study effectively addresses the multi-objective optimization challenge in building renovation by employing a reliable optimization algorithm with a computationally efficient reduced-order *** provides valuable insights and recommendations for optimizing energy retrofit strategies and meeting various performance objectives.

关键词： historic building energy-efficient retrofitting building energy simulation log-additive decomposition approach NSGA-II

A New Specimen of Crichtonpelta benxiensis(Dinosauria:Ankylosaurinae) from the Mid-Cretaceous of Liaoning Province,China

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Acta Geologica Sinica(English Edition) 2017年第3期91卷 781-790页

作者： YANG Jingtao YOU hailu XIE Li ZHOU Hongrui School of Earth Sciences and Resource China University of GeosciencesBeijing Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences Institute of Vertebrate Paleontology and PaleoanthropologyChinese Academy of Sciences College of Earth Sciences University of Chinese Academy of Sciences Geological Museum China University of GeosciencesBeijing

A new specimen of ankylosaurine dinosaur Crichtonpelta benxiensis is described. The new specimen is based on a nearly completely preserved skull from the same quarry as the holotype of the mid-Cretaceous Sunjiawan formation in Shuangmiao, Beipiao City, Liaoning Province, China. Cladistic analysis incorporating new information from the new specimen resolves Crichtonpelta benxiensis is more advanced than basal members of Ankylosauridae （Kunbarrasaurus, Liaoningosaurus, Chuanqiiong, Cedarpelta, Gobisaurus and Shamosaurus） and represents the first diverging branch of Ankylosaurinae. Comparisons to other mid-Cretaceous ankylosaurid-bearing dinosaur assemblages in northern China indicate a late Early Cretaceous to early Late Cretaceous age for the Shuangmiao dinosaur assemblage.

关键词： Shuangmiao mid-Cretaceous Ankylosauridae Ankylosaurinae Crichtonpelta

The Retinal Nerve fiber Layer Defects in Patients with Anterior Ischemic Optic Neuropathy

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眼科学报 1995年第3期11卷 165-167页

作者： hailu QiZang DepartmentofOphthalmology The2ndAffiliatedHospitalXian710004 DepartmentofOphthalmology The2ndAffilia

Purpose:To demonstrate the effects of optic nerve ischemia on retinal nerve fiber layer(RNfL)and the associated visual ***:23patients(25eyes)wits anterior ischemic optic neuropathy(AION)un derwent fundus fluorescein angiography(ffA),and then red-foree light pic-tures were taken via SE-40exceiter *** pictures were printed for RNAfL analysis,Humphrey central field analysis was *** dataobtained fromffA and visual field defects were analysed ***:The RNfL defects and the corresponding visual field edfects were pre-sented in 23of 25eyes(92%),The optic disc filling defects,RNAL edfects and visual field defects were found to be highly correspondent to each *** RNfL defects were mainly the local losses of RNfL which were correspondent to the ischemic ***:The poor optic disc filling or ischemia can result in the RNfL defects which cause the associated visual *** RNfLdefects are irrever-siable changes,the potential values in predicting the prognosis of visual field de-fects caused by RNfL damages were *** Science1995;11:165-167.

关键词：缺血性视神经病视网神经纤维层荧光眼底血管造影法