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Semantic separator learning and its applications in unsupervised Chinese text parsing

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Frontiers of Computer Science 2013年第1期7卷 55-68页

作者： Yuming WU xiaodong luo Zhen YANG Key Laboratory of Intelligent Information Processing Institute of Computing Technology Chinese Academy of Sciences Beijing 100190 China Graduate University of the Chinese Academy of Sciences Beijing 100049 China China Telecom Corporation Limited Shanghai Branch Shanghai 200120 China Shanghai Research Institute of China Telecom Corporation Limited Shanghai 200120 China

Grammar learning has been a bottleneck problem for a long time. In this paper, we propose a method of seman- tic separator learning, a special case of grammar learning. The method is based on the hypothesis that some classes of words, called semantic separators, split a sentence into sev- eral constituents. The semantic separators are represented by words together with their part-of-speech tags and other infor- mation so that rich semantic information can be involved. In the method, we first identify the semantic separators with the help of noun phrase boundaries, called subseparators. Next, the argument classes of the separators are learned from cor- pus by generalizing argument instances in a hypernym space. Finally, in order to evaluate the learned semantic separators, we use them in unsupervised Chinese text parsing. The exper- iments on a manually labeled test set show that the proposed method outperforms previous methods of unsupervised text parsing.

关键词： semantic separator separator learning unsuper vised text parsing

An asymmetrically variable wingtip anhedral angles morphing aircraft based on incremental sliding mode control:Improving lateral maneuver capability

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Chinese Journal of Aeronautics 2025年第1期38卷 455-470页

作者： xiaodong LIU Yong XU Jianqiao luo School of Aerospace Engineering Beijing Institute of TechnologyBeijing 100081China Chongqing Innovation Center Beijing Institute of TechnologyChongqing 401120China

This paper presents the design of an asymmetrically variable wingtip anhedral angles morphing aircraft,inspired by biomimetic mechanisms,to enhance lateral maneuver ***,we establish a lateral dynamic model considering additional forces and moments resulting during the morphing process,and convert it into a Multiple Input Multiple Output(MIMO)virtual control system by importing virtual ***,a classical dynamics inversion controller is designed for the outer-loop system.A new Global Fast Terminal Incremental Sliding Mode Controller(NDO-GFTISMC)is proposed for the inner-loop system,in which an adaptive law is implemented to weaken control surface chattering,and a Nonlinear Disturbance Observer(NDO)is integrated to compensate for unknown *** whole control system is proven semiglobally uniformly ultimately bounded based on the multi-Lyapunov function ***,we consider tracking errors and self-characteristics of actuators,a quadratic programmingbased dynamic control allocation law is designed,which allocates virtual control inputs to the asymmetrically deformed wingtip and *** dynamic models are incorporated to ensure physical realizability of designed allocation ***,comparative experimental results validate the effectiveness of the designed control system and control allocation *** NDO-GFTISMC features faster convergence,stronger robustness,and 81.25%and 75.0%reduction in maximum state tracking error under uncertainty compared to the Incremental Nonlinear Dynamic Inversion Controller based on NDO(NDO-INDI)and Incremental Sliding Mode Controller based on NDO(NDO-ISMC),*** design of the morphing aircraft significantly enhances lateral maneuver capability,maintaining a substantial control margin during lateral maneuvering,reducing the burden of the rudder surface,and effectively solving the actuator saturation problem of traditional aircraft during lateral maneuvering.

关键词： Morphing aircraft Lateral maneuver capability Incremental sliding mode control Multi-Lyapunov function method Control theory Control allocation law

High H_(2) selective performance of Ni-Fe-Ca/H-Al catalysts for steam reforming of biomass and plastic

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Journal of Energy Chemistry 2023年第5期80卷 215-227,I0006页

作者： Jin Deng Lingshuai Meng Duo Ma Yujie Zhou Xianyang Wang xiaodong luo Shenfu Yuan School of Chemical Science and Engineering Yunnan Provincial Key Laboratory of Carbon Neutral and Green Low-Carbon TechnologyKey Laboratory of Medicinal Chemistry for Natural ResourceMinistry of EducationNational Center for Experimental Chemistry and Chemical Engineering Education DemonstrationYunnan Characteristic Plant Extraction LaboratorySchool of PharmacyYunnan University650091 KunmingYunnanChina

The development of a selective catalyst for the conversion of biomass and plastics into H2by steam reforming can combat the energy crisis and global *** this work,support Ni-Fe-Ca/H-Al bifunctional catalysts were prepared by loading Ni and Fe into pretreatment CaO/Al_(2)O_(3)(Ca/H-Al)carriers and showed high catalytic activity for the steam reforming of biomass and ***,the idea of bidirectional degradation was exploited to strengthen the pyrolysis of plastic with a high H/C and biomass with a high O/***,the products presented high H2selective(1302.10 m L/g)and low CO_(2)yield(120.23 m L/g)in 7Ni-5Fe-Ca/H-Al(2:4)catalyst compared with current ***,the abundant oxygen vacancies(Ov)in the H-Al carrier exhibited an electron-deficient nature,providing active sites for anchoring Ni ***,Ni O interacted with Ca_(2)Fe_(2)O_(5)to produce more defective Ovsites,which stabilized the NiO particles in the 7Ni-5Fe-Ca/H-Al(2:4)catalyst,and the interaction between the catalyst and the carrier was enhanced,leading to the reduction of weakly basic sites,this property promoted the strong adsorption of CO_(2)and H2O by the catalyst,contributing to the enhancement of efficient steam conversion and the promotion of conversion of by-products to ***,7Ni-5Fe-Ca/H-Al(2:4)catalysts maintained structural integrity after regeneration and exhibited excellent regenerability in H2selection and CO_(2)*** work provides a new idea for the study of efficient H2production from steam reforming of biomass and plastics.

关键词： Biomass and plastic Pyrolysis Steam reforming Ni-Fe-Ca/H-Al catalyst H_(2)selective

AlH_(3)@NiF_(2)的合成、热稳定性及其对固体推进剂成药性能的影响

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固体火箭技术 2025年第1期48卷 56-61页

作者：付爽李斌郭翔胡翔王业腾徐星星骆晓冬周水平航天化学能源全国重点实验室襄阳441003 湖北航天化学技术研究所襄阳441003

三氢化铝(AlH_(3))是一种高效金属储氢材料,但因其热不稳定释氢问题,直接使用会导致固体推进剂产生裂纹和气孔,恶化推进剂性能。针对AlH_(3)热不稳定释氢问题,提出一种表面无机包覆处理提高AlH_(3)热稳定的新方法,即采用氟化镍(NiF_(2)... 详细信息

三氢化铝(AlH_(3))是一种高效金属储氢材料,但因其热不稳定释氢问题,直接使用会导致固体推进剂产生裂纹和气孔,恶化推进剂性能。针对AlH_(3)热不稳定释氢问题,提出一种表面无机包覆处理提高AlH_(3)热稳定的新方法,即采用氟化镍(NiF_(2))分散液为无机表面处理剂,通过NiF_(2)与AlH_(3)表面的Al(OH)_(3)、Al_(2)O_(3)等反应,在AlH_(3)表面原位形成致密无机壳层结构,制备出表面无机包覆的AlH_(3)@NiF_(2)材料。通过扫描电镜(SEM)、X射线光电子能谱仪(XPS)、原子光谱(ICP)等对AlH_(3)@NiF_(2)材料形貌及组成进行了表征;通过TG-DSC及真空热安定仪(VST)测试验证了表面包覆处理后材料的热稳定性。结果表明,AlH_(3)@NiF_(2)材料表面形成均匀含氟和镍化合物,表面Ni含量最多可达3%左右;AlH_(3)@NiF_(2)热分解温度比AlH_(3)提高3℃,50℃下10 d释氢率则由0.133%最低降低至0.046%;加入AlH_(3)@NiF_(2)的推进剂药块气孔明显减少,成药性能明显提升。

关键词：三氢化铝释氢表面包覆热稳定性推进剂性能

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Paleophytochemical Constituents from the Pliocene Fossil Wood of Pinus Armandii from Longling,Yunnan

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Acta Geologica Sinica(English Edition) 2008年第6期82卷 1146-1151页

作者： ZHAO Youxing LI Chengsen YI Tiemei luo xiaodong ZHOU Jun State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of Botany Chinese Academy of Sciences Kunming 650204 China Institute of Botany Chinese Academy of Sciences Beijing 100093 China

Specimens of fossil wood preserved lignified in Pliocene brown coal and identified as Pinus armandii Francher come from an opencast coalmine at Longling in western Yunnan Province, China. Phytochemical investigation of the fossil wood isolated using liquid column chromatography seven compounds （1-7） including a new fluorene derivative named 11,11-dimethyl-11H-benzo[b]fluorene. A further 28 volatiles were detected by gas chromatography-mass spectrometry （GC-MS）. Spectroscopic investigation methods, including MS and 1D and 2D-NMR techniques elucidated the structure of the seven compounds. Two types of natural products, isopimara and stilbene commonly occuring in extant and Pliocene fossil P. armandii indicate phytochemical fidelity during burial under certain circumstances in sediments. Discovery of stilbenes that can inhibit the activities of wood-destroying fungi in the Pliocene P. armandii prompts the assumption that the chemical preservation of this Pliocene fossil wood of P. armandii in brown coal might contribute to the presence of inner natural inhibitors against wood-destroying fungi.

关键词： Pliocene wood constituents stilbenoids phytochemistry Pinus armandii

Effect of driver roll rotational speed on hot ring rolling of AZ31 magnesium alloy

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Journal of Magnesium and Alloys 2014年第2期2卷 154-158页

作者： xiaodong luo Lianjie Li Wenlin Xu Yongxiang Zhu College of Metallurgical and Materials Engineering Chongqing University of Science and TechnologyChongqing 400041China College of Materials Science and Engineering Chongqing UniversityChongqing 400044China

Based on the ABAQUS/Explicit code,A 3D elastic-plastic and coupled thermo-mechanical FE model of radial ring rolling of AZ31 Magnesium alloy has been proposed to analyze the influence of rotational speed of driver roll to study the inhomogeneity distribution of strain and temperature,fishtail coefficient,rolling force *** results show that:(1)when the rotational speed of driver roll n increases,the strain distribution of the rolled ring becomes less homogeneous,and the temperature distribution more homogeneous yet,and leading to an optimal n value;(2)the fishtail coefficient firstly decreases,then increases with the increase of n;(3)the rolling force,contact area and rolling moment gradually descend with the increase of n.

关键词： Rotational speed of driver roll AZ31 magnesium alloy FEM Ring rolling

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深圳市坪山区体育公园

现代装饰 2025年第1期 184-187页

作者： Jacob van Rijs Wenchian Shi Tadeu Batista Luca Xu Chi Zhang Amanda Galiana Ortega Yifei Zhang Ilaria Furbetta Cai Huang xiaodong luo Ioanna Kleio Vontetsianou Kiril Emelianov Cosimo Scotucci Angelo Ia Delfa Jaroslaw Jeda 不详

MWRDV与香港华艺设计顾问(深圳)有限公司携手赢得了深圳东部坪山体育公园的设计竞赛,项目主要包括一,座羽毛球和体育赛事竞演中心、一座新的国家羽毛球训练中心、一座面向公众的全民健身中心和体育公园,以及配套的商业设施。全部共设置... 详细信息

MWRDV与香港华艺设计顾问(深圳)有限公司携手赢得了深圳东部坪山体育公园的设计竞赛,项目主要包括一,座羽毛球和体育赛事竞演中心、一座新的国家羽毛球训练中心、一座面向公众的全民健身中心和体育公园,以及配套的商业设施。全部共设置了100个羽毛球场,羽毛球运动为设计提供了主要灵感,其中最引人注目的是主建筑羽毛球拍形状的屋顶,约240米长,是整个体育公园的焦点。

关键词：羽毛球训练体育公园羽毛球运动羽毛球拍商业设施设计竞赛羽毛球场体育赛事

miR-200b-3p accelerates progression of pituitary adenomas by negatively regulating expression of RECK

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Oncology Research 2024年第5期32卷 933-941页

作者： XIAOXI WANG YANFEI JIA QIANG LI QIANG YANG YINGFENG LIU BEIFENG WEI XIANG NIU YINJIE ZHANG xiaodong luo ZIYU ZHAO PENG WANG Department of Neurosurgery Tianshui First People’s HospitalTianshuiChina Department of Neurosurgery The Second Affiliated Hospital of Lanzhou UniversityLanzhouChina

MicroRNA(miR)-200b-3p has been associated with many tumors,but its involvement in pituitary adenoma is *** study investigated the molecular mechanism underlying miR-200b-3p regulation in pituitary adenomas to provide a theoretical basis for *** was used to analyze pituitary adenoma-related genes and screen new targets related to RECK and *** well,the relationship between miR-200b-3p and RECK protein was verified using a double-luciferase reporter gene *** expression of miR-200b-3p in clinical samples was analyzed by in situ *** of the miR-200b-3p inhibitor and small interfering-RECK(si-RECK)was verified by ***3 cell viability and proliferation were detected using CCK8 and EdU *** was detected by flow cytometry and western *** healing and Transwell assays were used to detect cell migration and *** effects of miR-200b-3p and RECK on GH3 cells were verified using salvage ***-200b-3p was highly expressed in pituitary tumor *** of miR-200b-3p inhibited cell proliferation promoted cell apoptosis,inhibited invasion and migration,and inhibited the expression of matrix ***,miR-200b-3p negatively regulated *** expression of RECK in pituitary adenoma tissues was lower than that in neighboring ***-RECK rescued the function of miR-200b-3p inhibitors in the above cellular behaviors,and miR-200b-3p accelerated the development of pituitary adenoma by negatively regulating RECK *** summary,this study investigated the molecular mechanism by which miR-200b-3p regulates the progression of pituitary adenoma through the negative regulation of *** findings provide a new target for the treatment of pituitary adenoma.

关键词： Pituitary adenomas miR-200b-3p RECK Matrix metalloproteinase

Liposomes as versatile agents for the management of traumatic and nontraumatic central nervous system disorders:drug stability,targeting efficiency,and safety

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Neural Regeneration Research 2025年第7期20卷 1883-1899页

作者： Mingyu Zhang Chunyu Xiang Renrui Niu xiaodong He Wenqi luo Wanguo Liu Rui Gu Department of Orthopedic Surgery China-Japan Union Hospital of Jilin UniversityChangchunJilin ProvinceChina

Various nanoparticle-based drug delivery systems for the treatment of neurological disorders have been widely ***,their inability to cross the blood–brain barrier hampers the clinical translation of these therapeutic *** are nanoparticles composed of lipid bilayers,which can effectively encapsulate drugs and improve drug delivery across the blood–brain barrier and into brain tissue through their targeting and ***,they can potentially treat traumatic and nontraumatic central nervous system *** this review,we outlined the common properties and preparation methods of liposomes,including thin-film hydration,reverse-phase evaporation,solvent injection techniques,detergent removal methods,and microfluidics ***,we comprehensively discussed the current applications of liposomes in central nervous system diseases,such as Alzheimer's disease,Parkinson's disease,Huntington's disease,amyotrophic lateral sclerosis,traumatic brain injury,spinal cord injury,and brain *** studies related to liposomes are still in the laboratory stage and have not yet entered clinical ***,their application as drug delivery systems in clinical practice faces challenges such as drug stability,targeting efficiency,and ***,we proposed development strategies related to liposomes to further promote their development in neurological disease research.

关键词： Alzheimer's disease amyotrophic lateral sclerosis brain tumors central nervous system Huntington's disease liposome drug delivery neurological disorders Parkinson's disease spinal cord injury traumatic brain injury