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30篇 您的检索式:作者名="X.YANG"
    题名 作者 年代 出处 被引量
1不确定动态环境下移动机器人的完全遍历路径规划显示文摘基于生物激励神经网络、滚动窗口和启发式搜索,提出了一种新的完全遍历路径规划方法.该方法用G rossberg的生物神经网络实现移动机器人的局部环境建模,将滚动窗口的概念引入到局部路径规划,由启发式算法决定滚动窗口内的局域路径规划目标.该方法能在不确定动态环境中有效地实现机器人自主避障的完全遍历路径规划.仿真研究证明了该方法的可用性和有效性.邱雪娜 刘士荣 宋加涛 Simon X.YANG 2006机器人2006,28,6:26
2Multi-AUV SOM task allocation algorithm considering initial orientation and ocean current environment显示文摘There is an ocean current in the actual underwater working environment. An improved self-organizing neural network task allocation model of multiple autonomous underwater vehicles(AUVs) is proposed for a three-dimensional underwater workspace in the ocean current. Each AUV in the model will be competed, and the shortest path under an ocean current and different azimuths will be selected for task assignment and path planning while guaranteeing the least total consumption. First, the initial position and orientation of each AUV are determined. The velocity and azimuths of the constant ocean current are determined. Then the AUV task assignment problem in the constant ocean current environment is considered. The AUV that has the shortest path is selected for task assignment and path planning. Finally, to prove the effectiveness of the proposed method, simulation results are given.Da-qi ZHU Yun QU Simon X.YANG 2019Frontiers of Information Technology & Electronic Engineering2019,20,3:8
3基于三维体质心的无线传感器网络节点定位算法显示文摘针对无线传感器网络中传感器节点初始位置未知的问题,提出一种基于三维体质心的分布式无线传感器网络节点定位算法。算法假设网络中有一定比例的锚节点(位置已知的节点),利用三维辅助坐标系,建立节点间的通信约束关系和空间几何关系,研究三维空间内包含未知节点的三维体构成方法,确定三维体的多个侧面和曲面来构成曲面三维体;为了减小算法计算量和网络能耗,寻找与曲面三维体对应的由多个侧面组成的平面三维体,通过确定平面三维体的质心来获得曲面三维体质心,从而把曲面三维体的质心作为未知节点的估计位置。该算法是一种完全基于网络连通性的分布式算法,算法设计简单,计算量小,节点间通信开销少。仿真结果显示,该算法适合于各种规模的无线传感器网络的节点定位。赖旭芝 王金鑫 曾桂秀 吴敏 佘锦华 Simon X.Yang 2008系统仿真学报2008,20,15:8
4移动机器人的完全遍历路径规划:生物激励与启发式模板方法显示文摘提出了基于生物激励神经网络的一种新的完全遍历路径规划方法.该方法集成了模板模型、启发式搜索和障碍物逼近算法.一种称为分流合作-竞争反馈网络的生物激励神经网络被用于移动机器人的工作环境建模,而模板模型法、启发式算法和障碍物逼近算法用于移动机器人的避障路径规划,其中障碍物逼近算法能够实现不规则形状障碍物周边区域的遍历,以进一步改善路径规划的覆盖区域,仿真研究表明,本文方法使得路径规划的性能得到明显的改进,例如规划路径的重叠率,而且算法简单有效.邱雪娜 刘士荣 俞金寿 Simon X.Yang 2006模式识别与人工智能2006,19,1:7
5基于遗传算法的三维无线传感器网络定位新算法显示文摘针对三维无线传感器网络节点自身定位问题,提出了一种基于遗传算法的新定位算法。该算法通过分析未知节点与它的无线射程范围内的已知节点之间的通讯约束和距离测量,对未知节点建立数学模型;针对此数学模型利用遗传算法求解,把该解作为未知节点的估计位置。理论分析和试验结果表明,该算法具有很强的健壮性,未知节点的失效和新节点的加入不会影响算法的性能,并且算法定位精度高,条件简单,适合各种规模的无线传感器网络的节点定位。王金鑫 赖旭芝 吴敏 Simon X.Yang 2008高技术通讯2008,18,6:6
6Expression of Gli1 in the hedgehog signaling pathway and breast cancer recurrence显示文摘The hedgehog(Hh) signaling pathway plays an essential role in the embryonic development and homeostasis of diverse adult tissues,and its deregulation has been implicated in the tumorigenesis and metastasis of various malignancies including breast cancer.Aberrant activation of the Hh pathway includes the following mechanisms:(I)Naoko Takebe Sally Hunsberger Sherry X.Yang 2012Chinese Journal of Cancer Research2012,24,4:6
7基于电子鼻的气体等级鉴别信号处理方法显示文摘本文介绍了电子鼻的概念及电子鼻信号处理的重要性。从理论研究与实验分析的角度探讨了独立分量分析、模糊神经网络等新方法在电子鼻信号处理中的作用。建立了对应的气体等级鉴别数学模型,并得到实验结果的验证。刘瑜 田逢春 Simon X.Yang 代才莉 2007信号处理2007,23,2:5
8Leaching of rare Earth elements from an Illinois basin coal source显示文摘The existence of rare earth elements(REEs) in coal sources at elevated concentrations has been the focus of several studies over the past decade. However, limited research has been conducted on methods to recover and refine the REEs. This paper reports the results of a detailed study into the potential of selectively recovering REEs in an Illinois basin coal source by leaching. Leaching characteristics are obtained for several segments obtained from a core sample as well as three different reject materials collected at a coal processing plant. Using a 1.2 mol/L sulfuric acid solution at 75 ℃,over 60% REE recovery is achieved from the direct floor and an inner parting material as well as the coal-rich core segments that are pretreated by low-temperature plasma oxidation to obtain access to the microdispersed mineral matter. In the leachable parting material, fluorapatite is detected by XRD analysis,which is one of the more soluble phosphate minerals with a documented association with REEs. For the three plant reject samples, the leaching recovery values obtained for the heavy REEs are higher than those obtained for the light REEs under the standard leaching conditions and when 0.1 mol/L(NH_4)_2SO_4 was used to extract REEs by an ion exchange mechanism. Thermal activation by roasting or chemical activation by pretreatment using 8 mol/L NaOH solution increases the total REE recovery with significantly higher gains obtained for the light REEs. Leaching kinetics are relatively fast within the first 2 h and then slow to provide relatively low overall recovery values under the standard test conditions for the coarse and fine reject samples. However, significantly higher recovery values are realized when treating mixed-phase(middling) particles existing within the coarse reject material.X.Yang J.Werner R.Q.Honaker 2019Journal of Rare Earths2019,37,3:4
9Effects of Hydrophilic Monomer Types and Level on Polystyrene-Acrylate/montmorillonite Nanocomposite Made by Emulsion Polymerization显示文摘1 Results Nanocomposite has attracted more and more interest all over the world.Polystyrene (PS) is a commercialized and mass-productive polymer,continuous research efforts have been devoted to the development of polystyrene/montmorillonite (PS/MMT) nanocomposites[1-2].But the polarity of styrene (St) is too small to intercalate the space between the clay layers.The polarity of hydrophilic monomer is so strong that it can intercalate the MMT easily,the intercalated smectic clays maybe exfoliated by usin...F.A.Zhang L.Chen J.Q.Ma X.Yang 2007复旦学报(自然科学版)2007,46,5:3
10A dissolution-diffusion sliding model for soft rock grains with hydro-mechanical effect显示文摘The deformation and failure of soft rock affected by hydro-mechanical(HM) effect are one of the most concerns in geotechnical engineering, which are basically attributed to the grain sliding of soft rock. This study tried to develop a dissolution-diffusion sliding model for the typical red bed soft rock in South China. Based on hydration film, mineral dissolution and diffusion theory, and geochemical thermodynamics, a dissolution-diffusion sliding model with the HM effect was established to account for the sliding rate. Combined with the digital image processing technology, the relationship between the grain size of soft rock and the amplitude of sliding surface was presented. An equation for the strain rate of soft rocks under steady state was also derived. The reliability of the dissolution-diffusion sliding model was verified by triaxial creep tests on the soft rock with the HM coupling effect and by the relationship between the inversion average disjoining pressure and the average thickness of the hydration film. The results showed that the sliding rate of the soft rock grains was affected significantly by the waviness of sliding surface, the shear stress, and the average thickness of hydration film. The average grain size is essential for controlling the steady-state creep rate of soft rock. This study provides a new idea for investigating the deformation and failure of soft rock with the HM effect.Z.Liu C.Y.Zhou B.T.Li Y.Q.Lu X.Yang 2018Journal of Rock Mechanics and Geotechnical Engineering2018,10,3:3
11The Lobster Eye Imager for Astronomy Onboard the SATech-01 Satellite显示文摘The Lobster Eye Imager for Astronomy(LEIA),a pathfinder of the Wide-field X-ray Telescope of the Einstein Probe mission,was successfully launched onboard the SATech-01 satellite of the Chinese Academy of Sciences on2022 July 27.In this paper,we introduce the design and on-ground test results of the LEIA instrument.Using stateof-the-art Micro-Pore Optics(MPO),a wide field of view of 346 square degrees(18.6°×18.6°)of the X-ray imager is realized.An optical assembly composed of 36 MPO chips is used to focus incident X-ray photons,and four large-format complementary metal-oxide semiconductor(CMOS)sensors,each of size 6 cm×6 cm,are used as the focal plane detectors.The instrument has an angular resolution of 4’-8’(in terms of FWHM)for the central focal spot of the point-spread function,and an effective area of 2-3 cm^(2) at 1 keV in essentially all the directions within the field of view.The detection passband is 0.5-4 keV in soft X-rays and the sensitivity is2-3×10^(-11) erg s^(-1) cm^(-2)(about 1 milliCrab)with a 1000 s observation.The total weight of LEIA is 56 kg and the power is 85 W.The satellite,with a design lifetime of 2 yr,operates in a Sun-synchronous orbit of 500 km with an orbital period of 95 minutes.LEIA is paving the way for future missions by verifying in flight the technologies of both novel focusing imaging optics and CMOS sensors for X-ray observation,and by optimizing the working setups of the instrumental parameters.In addition,LEIA is able to carry out scientific observations to find new transients and to monitor known sources in the soft X-ray band,albeit with limited useful observing time available.Z.X.Ling X.J.Sun C.Zhang S.L.Sun G.Jin S.N.Zhang X.F.Zhang J.B.Chang F.S.Chen Y.F.Chen Z.W.Cheng W.Fu Y.X.Han H.Li J.F.Li Y.Li Z.D.Li P.R.Liu Y.H.Lv X.H.Ma Y.J.Tang C.B.Wang R.J.Xie Y.L.Xue A.L.Yan Q.Zhang C.Y.Bao H.B.Cai H.Q.Cheng C.Z.Cui Y.F.Dai D.W.Fan H.B.Hu J.W.Hu M.H.Huang Z.Q.Jia C.C.Jin D.Y.Li J.Q.Li H.Y.Liu M.J.Liu Y.Liu H.W.Pan Y.L.Qiu M.Sugizaki H.Sun W.X.Wang Y.L.Wang Q.Y.Wu X.P.Xu Y.F.Xu H.N.Yang X.Yang B.Zhang M.Zhang W.D.Zhang Z.Zhang D.H.Zhao X.Q.Cong B.W.Jiang L.H.Li X.B.Qiu J.N.Sun D.T.Su J.Wang C.Wu Z.Xu X.M.Yang S.K.Zhang Z.Zhang N.Zhang Y.F.Zhu H.Y.Ban X.Z.Bi Z.M.Cai W.Chen X.Chen Y.H.Chen Y.Cui X.L.Duan Z.G Feng Y.Gao J.W.He T.He J.J.Huang F.Li J.S.Li T.J.Li T.T.Li H.Q.Liu L.Liu R.Liu S.Liu N.Meng Q.Shi A.T.Sun Y.M.Wang Y.B.Wang H.C.Wu D.X Xu Y.Q Yang Y.Yang X.S.Yu K.X.Zhang Y.L.Zhang Y.H.Zhang Y.T.Zhang H.Zhou X.C.Zhu J.S.Cheng L.Qin L.Wang Q.L.Wang M.Bai R.L.Gao Z.Ji Y.R.Liu F.L.Ma Y.J.Shi J.Su Y.Y.Tan J.Z.Tong H.T.Xu C.B.Xue G.F.Xue W.Yuan 2023Research in Astronomy and Astrophysics2023,23,9:2
12“双导向-翻转-多层次”工程人才培养模式设计显示文摘工程技术人才是推动技术革新和社会进步的重要力量。我国在工程技术人才培养过程中还存在'重理论、轻实践',特色不明确,师资不完善等问题,借鉴国外工程技术人才培养模式,制定人才联动培养方案,搭建实验实践网络平台,构建'双导向-翻转-多层次'工科专业工程人才培养模式,可极大提高学生的创新思维和实践能力,实现工程人才培养目标。邢亚阁 许青莲 车振明 马力 Simon X.Yang 2017中国高校科技2017,,8:2
13查看详情显示文摘A.Le Gal X.Yang M.Kluppel 0,,:1
14The multi‐hit hypothesis of primary biliary cirrhosis: polyinosinic‐polycytidylic acid (poly I:C) and murine autoimmune cholangitis显示文摘Y. M.Ambrosini G.‐X.Yang W.Zhang M.Tsuda S.Shu K.Tsuneyama P. S. C.Leung A. A.Ansari R. L.Coppel M. E.Gershwin 2011Clinical & Experimental Immunology2011,,1:1
15Reliability analysis of climate change of tropical cyclone activity over the western North Pacific显示文摘Ren E J.Liang G.Wu W.Dong and X.Yang 0,,:1
16Robust stabilization and disturbance attenuation for a class of underactuated mechanical systems显示文摘The robust control problem for a class of underactuated mechanical systems called acrobots is addressed.The goal is to drive the acrobots away from the straight-down position and balance them at the straight-up unstable equilibrium position in the presence of parametric uncertainties and external disturbance.First,in the swing-up area,it is shown that the time derivative of energy is independent of the parameter uncertainties,but exogenous disturbance may destroy the characteristic of increase in mechanical energy.So,a swing-up controller with compensator is designed to suppress the influence of the disturbance.Then,in the attractive area,the control problem is formulated into a H∞ control framework by introducing a proper error signal,and a sufficient condition of the existence of H∞ state feedback control law based on linear matrix inequality(LMI) is proposed to guarantee the quadratic stability of the control system.Finally,the simulation results show that the proposed control approach can simultaneously handle a maximum ±10% parameter perturbation and a big disturbance simultaneously.赖旭芝 潘昌忠 吴敏 佘锦华 Simon X.YANG 2012Journal of Central South University2012,19,9:1
17Taurine protects against bil-irubin-induced neurotoxicity in vitro显示文摘Zhang B X.Yang X.Gao 0,,:1
18Photocatalytic oxidation for indoor air purification:a hterature review显示文摘J.Zhao X.Yang 0,,05:1
19Predicting temperature-dependent ultimate strengths of body-centered-cubic(BCC)high-entropy alloys显示文摘This paper presents a bilinear log model,for predicting temperature-dependent ultimate strength of high-entropy alloys(HEAs)based on 21 HEA compositions.We consider the break temperature,Tbreak,introduced in the model,an important parameter for design of materials with attractive high-temperature properties,one warranting inclusion in alloy specifications.For reliable operation,the operating temperature of alloys may need to stay below Tbreak.We introduce a technique of global optimization,one enabling concurrent optimization of model parameters over low-temperature and high-temperature regimes.Furthermore,we suggest a general framework for joint optimization of alloy properties,capable of accounting for physics-based dependencies,and show how a special case can be formulated to address the identification of HEAs offering attractive ultimate strength.We advocate for the selection of an optimization technique suitable for the problem at hand and the data available,and for properly accounting for the underlying sources of variations.B.Steingrimsson X.Fan X.Yang M.C.Gao Y.Zhang P.K.Liaw 2021npj Computational Materials2021,,1:1
20Assimilation and Mineral Fonnation during Sintering for Blends Containing Magnetite Concentrate and Hematite/Pisolite Sintering Fines显示文摘L X.YANG L DAVIS 0,,3:1
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