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基于条件粒子滤波的高动态高灵敏度GNSS信号跟踪算法

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西北工业大学学报 2016年第2期34卷 268-274页

作者：徐昊玮廉保旺唐成凯何伟西北工业大学电子信息学院陕西西安710072

随着北斗全球定位卫星系统的逐步完善和GPS等卫星系统的更新换代,卫星接收机的灵敏度需求也逐渐提高,而导航信号的微弱性和卫星与接收机之间的相对运动导致现有的卫星接收机高灵敏度跟踪算法的精度无法满足需求。针对这种情况,提出了一... 详细信息

随着北斗全球定位卫星系统的逐步完善和GPS等卫星系统的更新换代,卫星接收机的灵敏度需求也逐渐提高,而导航信号的微弱性和卫星与接收机之间的相对运动导致现有的卫星接收机高灵敏度跟踪算法的精度无法满足需求。针对这种情况,提出了一种基于粒子滤波的高灵敏度高动态跟踪算法。该算法利用粒子滤波对跟踪环路的各个因子进行修正,并在信号强度和动态应力自适应辅助调节下,实现高精度的接收机高灵敏度跟踪。该算法可以有效降低加加速度对跟踪环路的影响,对突发动态性改变具有较好的跟踪性能。将文中所提出的方法与现有的多种跟踪算法从估计准确度、动态性能和载噪比影响三方面进行分析对比,结果表明新算法相比于现有的跟踪算法能有效提高了接收机的估计准确度和动态性能,并降低载噪比的影响。

关键词：高动态高灵敏度粒子滤波跟踪

Highly-chlorinated inert and robust interphase without mineralization of oxide enhancing high-rate Li metal batteries

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Chinese Chemical Letters 2024年第6期35卷 239-243页

作者： Long Li Kang Yang Chenpeng Xi Mengchao Li Borong Li Gui Xu Yuanbin Xiao Xiancai Cui Zhiliang Liu Lingyun Li Yan Yu chengkai Yang Key Laboratory of Advanced Materials Technologies International(HongKong Macao and Taiwan)Joint Laboratory on Advanced Materials TechnologiesSchool of Materials Science and EngineeringFuzhou UniversityFuzhou 350108China College of Material Sciences and Chemical Engineering Harbin Engineering UniversityHarbin 150001China

Side reactions and dendrite growth triggered by the unstable interface and inhomogeneous deposition have become the biggest obstacle to the commercialization for lithium metal *** this study,a highly-chlorinated organic-inorganic hybrid interfacial protective layer is developed by rationally tuning the interfacial passivation and robustness to achieve the convenient and efficient Li metal *** polyvinyl chloride(PVC)can effectively resist water and oxygen,which is confirmed by density functional *** organic-dominant solid electrolyte interphases(SEI)with lithium chloride are investigated by the X-ray photoelectron spectroscopy(XPS)with little mineralization of oxide,such as Li_(2)O and Li_(2)CO_(3).With such artificial SEI,a uniform and dense lithium deposition morphology are formed and an ultra-long stable cycle of over 500 h are achieved even at an ultra-high current density of 10 m A/cm^(2).Moreover,the simple and convenient protected anode also exhibits excellent battery stability when paired with the LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)(NCM811)and LiFePO_(4)(LFP)cathode,showing great potential for the commercial application of lithium metal batteries.

关键词： Highly-chlorinated Water/oxygen resistance Stable interphase Dendrite-free lithium metal batteries High-rate

A biomaterial-based therapy for lower limb ischemia using Sr/Si bioactive hydrogel that inhibits skeletal muscle necrosis and enhances angiogenesis

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Bioactive Materials 2023年第8期26卷 264-278页

作者： Ye Yuan Zhaowenbin Zhang Fandi Mo Chen Yang Yiren Jiao Enci Wang Yuchong Zhang Peng Lin chengkai Hu Weiguo Fu Jiang Chang Lixin Wang Department of Vascular Surgery Zhongshan HospitalFudan University180 Fenglin RoadShanghai200032China Department of Vascular Surgery Zhongshan Xiamen HospitalFudan University668 JinhuRoadXiamen361015China Joint Centre of Translational Medicine The First Affiliated Hospital of Wenzhou Medical UniversityWenzhou325000China Zhejiang Engineering Research Center for Tissue Repair Materials Wenzhou InstituteUniversity of Chinese Academy of SciencesWenzhou325000China Shanghai Institute of Ceramics Chinese Academy of Sciences1295 Dingxi RoadShanghai200050China

Muscle necrosis and angiogenesis are two major challenges in the treatment of lower-limb ischemic *** this study,a triple-functional Sr/Si-containing bioceramic/alginate composite hydrogel with simultaneous bioactivity in enhancing angiogenesis,regulating inflammation,and inhibiting muscle necrosis was designed to treat lower-limb ischemic *** particular,sodium alginate,calcium silicate and strontium carbonate were used to prepare injectable hydrogels,which was gelled within 10 *** importantly,this composite hydrogel sustainedly releases bioactive Sr^(2+)and SiO_(3)^(2-) ions within 28 *** biological activity of the bioactive ions released from the hydrogels was verified on HUVECs,SMCs,C2C12 and Raw 264.7 cells in vitro,and the therapeutic effect of the hydrogel was confirmed using C57BL/6 mouse model of femoral artery ligation in *** results showed that the composite hydrogel stimulated angiogenesis,developed new collateral capillaries,and re-established the blood *** addition,the bioactive hydrogel directly promoted the expression of muscle-regulating factors(MyoG and MyoD)to protect skeletal muscle from necrosis,inhibited M1 polarization,and promoted M2 polarization of macrophages to reduce inflammation,thereby protecting skeletal muscle cells and indirectly promoting *** results indicate that these bioceramic/alginate composite bioactive hydrogels are effective biomaterials for treating hindlimb ischemia and suggest that biomaterial-based approaches may have remarkable potential in treating ischemic diseases.

关键词： Hindlimb ischemic diseases Strontium carbonate and calcium silicate bioceramic Bioactive hydrogel Muscle necrosis Angiogenesis

A Review of Solid Electrolyte Interphase(SEI)and Dendrite Formation in Lithium Batteries

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Electrochemical Energy Reviews 2023年第1期6卷 680-725页

作者： Borong Li Yu Chao Mengchao Li Yuanbin Xiao Rui Li Kang Yang Xiancai Cui Gui Xu Lingyun Li chengkai Yang Yan Yu David P.Wilkinson Jiujun Zhang College of Materials Science and Engineering Fuzhou UniversityFuzhou 350108FujianChina Key Laboratory of Eco-Materials Advanced Technology(Fuzhou University) Fuzhou UniversityFuzhou 350108FujianChina Department of Chemical and Biochemical Engineering University of British ColumbiaVancouverBC V6T1W5Canada Institute for Sustainable Energy/College of Sciences Shanghai UniversityShanghai 200444China

Lithium-metal batteries with high energy/power densities have significant applications in electronics,electric vehicles,and stationary power ***,the unstable lithium-metal-anode/electrolyte interface has induced insufficient cycle life and safety *** improve the cycle life and safety,understanding the formation of the solid electrolyte interphase(SEI)and growth of lithium dendrites near the anode/electrolyte interface,regulating the electrodeposition/electrostripping processes of Li^(+),and developing multiple approaches for protecting the lithium-metal surface and SEI layer are crucial and *** paper comprehensively reviews the research progress in SEI and lithium dendrite growth in terms of their classical electrochemical lithium plating/stripping processes,interface interaction/nucleation processes,anode geometric evolution,fundamental electrolyte reduction mechanisms,and effects on battery *** important aspects,such as charge transfer,the local current distribution,solvation,desolvation,ion diffusion through the interface,inhibition of dendrites by the SEI,additives,models for dendrite formation,heterogeneous nucleation,asymmetric processes during stripping/plating,the host matrix,and in situ nucleation characterization,are also analyzed based on experimental observations and theoretical *** technical challenges in improving SEI properties and reducing lithium dendrite growth are ***,possible future research directions for overcoming the challenges are also proposed to facilitate further research and development toward practical applications.

关键词： Lithium-metal anode Solid electrolyte interphase(SEI) Dendrite formation Lithium batteries Classical electrochemical processes Additives heterogeneous nucleation Asymmetric processes Solvation structure Desolvation In situ characterization of nucleation

Erratum to:Efficient flexible perovskite solar cells and modules using a stable SnO_(2)-nanocrystal isopropanol dispersion

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Nano Research 2024年第4期17卷 4641-4642页

作者： Zhiwei Su Jing Li Ruixuan Jiang Shujie Zhang chengkai Jin Feng Ye Bingcan Ke Mengjun Zhou Jinhui Tong Hyesung Park Fuzhi Huang Yi-Bing Cheng Tongle Bu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China School of Material Science and Engineering Wuhan University of TechnologyWuhan 430070China Department of Materials Science and Engineering Graduate School of Semiconductor Materials and Devices EngineeringGraduate School of Carbon NerutralityLow Dimensional Carbon Materials CenterUlsan National Institute of Science and TechnologyUlsan 44919Republic of Korea Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratry Foshan 528200China

Erratum to Nano Research,2024,17(4):2704-2711 https://***/10.1007/s12274-023-6115-y(1)In the article,the table of contents(TOC)image was unfortunately mispresented.

关键词： perovskite dispersion modules

Elevated CO2 differentially affects tobacco and rice defense against lepidopteran larvae via the jasmonic acid signaling pathway

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Journal of Integrative Plant Biology 2018年第5期60卷 412-431页

作者： chengkai Lu Jinfeng qi Christian hettenhausen Yunting Lei Jingxiong Zhang Mou Zhang Cuiping Zhang Juan Song Jing Li Guoyan Cao Saif ul Malook Jianqiang Wu Department of Economic Plants and Biotechnology Yunnan Key Laboratory for Wild Plant Resources Kunming Institute of Botany the Chinese Academy of Sciences Kunming 650201 China University of Chinese Academy of Sciences Beijing 100049 China College of Plant Protection Yunnan Agriculture University Kunming 650201 China

Atmospheric CO2 levels are rapidly increasing due to human activities. However, the effects of elevated CO2 （ECO2） on plant defense against insects and the underlying mechanisms remain poorly understood. here we show that ECO2 increased the photosynthetic rates and the biomass of tobacco and rice plants, and the chewing lepidopteran insects Spodoptera litura and Mythimna separata gained less and more mass on tobacco and rice plants, respectively. Consistently, under ECO2, the levels of jasmonic acid （JA）, the main phytohormone controlling plant defense against these lepidopteran insects, as well as the main defense-related metabolites, were increased and decreased in insectdamaged tobacco and rice plants. Importantly, bioassays and quantification of defense-related metabolites in tobacco and rice silenced in JA biosynthesis and perception indicate that ECO2 changes plant resistance mainly by affecting the JA pathway. We further demonstrate that the defensive metabolites, but not total N or protein, are the main factors contributing to the altered defense levels under ECO2. This study illustrates that ECO2 changes the interplay between plants and insects, and we propose that crops should be studied for their resistance to the major pests under ECO2 to predict the impact of ECO2 on future agroecosystems.

关键词： Georg Jander Cornell University USA

A multi-axis robot-based bioprinting system supporting natural cell function preservation and cardiac tissue fabrication

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Bioactive Materials 2022年第12期7卷 138-150页

作者： Zeyu Zhang Chenming Wu chengkai Dai Qingqing Shi Guoxin Fang Dongfang Xie Xiangjie Zhao Yong-Jin Liu Charlie CLWang Xiu-Jie Wang Institute of Genetics and Developmental Biology Innovation Academy of Seed DesignChinese Academy of SciencesBeijing100101China Beijing National Research Center for Information Science and Technology Department of Computer Science and TechnologyTsinghua UniversityBeijing100084China Department of Mechanical Aerospace and Civil EngineeringThe University of ManchesterManchesterM204BXUK Faculty of Industrial Design Engineering Delft University of TechnologyDelft2628the Netherlands University of Chinese Academy of Sciences Beijing100049China

Despite the recent advances in artificial tissue and organ engineering,how to generate large size viable and functional complex organs still remains as a grand challenge for regenerative ***-dimensional bioprinting has demonstrated its advantages as one of the major methods in fabricating simple tissues,yet it still faces difficulties to generate vasculatures and preserve cell functions in complex organ ***,we overcome the limitations of conventional bioprinting systems by converting a six degree-of-freedom robotic arm into a bioprinter,therefore enables cell printing on 3D complex-shaped vascular scaffolds from all *** also developed an oil bath-based cell printing method to better preserve cell natural functions after *** with a self-designed bioreactor and a repeated print-and-culture strategy,our bioprinting system is capable to generate vascularized,contractible,and long-term survived cardiac *** bioprinting strategy mimics the in vivo organ development process and presents a promising solution for in vitro fabrication of complex organs.

关键词： Six degree-of-freedom robot 3D bioprinting Artificial organ engineering Print-and-culture Cardiac tissue fabrication

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气垫式越野机器人土壤参数分步识别

机械工程学报 2013年第9期49卷 1-11页

作者：许烁孙成恺屠大维上海大学机电工程与自动化学院上海200072 上海大学上海市机械自动化及机器人重点实验室上海200072

土壤参数在线识别需要解决由多参数耦合引起的估值多解问题以及由状态噪声和测量噪声引起的估值准确性问题。为了解决估值多解问题,利用气垫式越野机器人的垂向力控制自由度,分别设计g-EKF算法、对数均值法和最小二乘法对3个推力相关土... 详细信息

土壤参数在线识别需要解决由多参数耦合引起的估值多解问题以及由状态噪声和测量噪声引起的估值准确性问题。为了解决估值多解问题,利用气垫式越野机器人的垂向力控制自由度,分别设计g-EKF算法、对数均值法和最小二乘法对3个推力相关土壤参数、3个垂向接地压力相关土壤参数和2个推土阻力相关土壤参数进行分步识别。为了解决估值准确性问题,在第一步g-EKF算法中,采用采样点选择、样本重排和测量值修正等多种措施抑制状态噪声和测量噪声的影响;在第二步对数均值法中,利用对数变换抑制非对称分布噪声对均值计算的影响。开展多角度的试验研究,包括各步估值算法的可行性和准确性、分步估值准确性的递次影响、土壤参数估值准确性对能耗优化的影响。试验结果表明,在各种噪声水平的工况下,提出的土壤参数分步识别策略及相应算法均能够有效解决多解问题和准确性问题。

关键词：气垫车越野机器人土壤参数参数识别估值误差

Oriented assembly of metal-organic frameworks and deficient TiO_(2) nanowires directed by lattice matching for efficient photoreversible color switching

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Science China Materials 2022年第4期65卷 992-999页

作者： Mingxiong Lin Weishan Jiang chengkai Yang Zanyong Zhuang Yan Yu College of Materials Science and Engineering Fuzhou UniversityFuzhou350108China Key Laboratory of Advanced Materials Technologies Fuzhou UniversityFuzhou350108China

The photoreversible color switching system(PCSS)is attracting increasing attention for use in alleviating energy crisis and environmental *** report a robust PCSS in which lattice matching enables bottom-up oriented assembly between metal-organic frameworks(MOFs)and inorganic nanocrystals(INCs),two distinct entities that differ drastically in structure and ***,cubic-phase Prussian blue(PB)of a framework backbone is spontaneously attached to rutile TiO_(2)nanowires in a defined orientation triggered by the lattice matching between the(001)plane of TiO_(2)and the(222)plane of *** light irradiation accelerates the photoelectron transport within the oriented TiO_(2)/PB system and enables fast photo *** derived TiO_(2)/PB paper can be ranked as one of the best light-printing papers in literature because of its high resolution(∼µm)and capability to be repeatedly written for>100 times without significant loss of *** ultrathin TiO_(2)nanowires are rich in oxygen and Ti vacancies,which allow visible-and sunlight-light *** functional theory calculations suggest that the[Fe(CN)_(6)]^(4−) ligand from the PB attaches preferentially to the(110)surface of TiO_(2)to give the ordered TiO_(2)/PB *** findings demonstrate the strong versatility of particles-mediated assembly in advanced materials design.

关键词： photoreversible color switching metal-organic framework oriented assembly lattice matching defects