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Chinese Journal of Aeronautics 2011年第5期24卷 648-656页

作者： ZHOU Xiaoyao zhang zhiyong FAN Dapeng College of Mechatronics and Automation National University of Defense Technology Changsha 410073 China

The performance of any inertially stabilized platform （ISP） is strongly related to the bandwidth and accuracy of the angular velocity signals. This paper discusses the development of an optimal state estimator for sensing inertial velocity using low-cost micro-electro-mechanical systems （MEMS） sensors. A low-bandwidth gyroscope is used alone with two low-performance accelerometers to obtain the estimation. The gyroscope has its own limited dynamics and mainly contributes to the low-frequency components of the estimation. The accelerometers have inherent biases and mainly contribute to the high-frequency components of the estimation. Extensive experimental results show that the state estimator can achieve high-performance signals over a wide range of velocities without drifts in both the t- and s-domains. Furthermore, with applications in miniature inertially stabilized platforms, the control characteristic presents a significantly improvement over the existing methods. The method can be also applied to robotics, attitude estimation, and friction compensation.

关键词： angular velocity low-cost sensor gyroscope accelerometer Kalman filter inertially stabilized platform

BASIC THEORIES AND KEY TECHNOLOGIES IN NEXT GENERATION NETWORKS

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China Communications 2015年第10期12卷 I0002-I0003页

作者： zhang Ping FENG zhiyong HU Fei

The next generation network is a high-speed broad-band network based on the packets, which offers unrestricted access by users to different service providers. It supports generalized mobility which will allow consiste... 详细信息

关键词：下一代网络技术高速宽带网络业务提供商用户

Harnessing cytokine-induced killer cells to accelerate diabetic wound healing:an approach to regulating post-traumatic inflammation

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Regenerative Biomaterials 2024年第2期3卷 88-99页

作者： Yixi Yang Cheng zhang Yuan Jiang Yijun He iawei Cai Lin Liang Zhaohuan Chen Sicheng Pan Chu Hua Keke Wu Le Wang zhiyong zhang Translational Research Centre of Regenerative Medicine and 3D Printing of Guangzhou Medical University Guangdong Province Engineering Research Center for Biomedical EngineeringState Key Laboratory of Respiratory DiseaseDepartment of Orthopaedic SurgeryMedical Technology and Related Equipment Research for Spinal Injury TreatmentCity Key LaboratoryThe Third Affliated Hospital of Guangzhou Medical UniversitySchool of Biomedical EngineeringGuangzhou MedicalUniversityGuangzhouGuangdong510150P.R.China Department of Osteoarthropathy and Sports Medicine Panyu Central HospitalGuangzhou 511400P.R.China

Impaired immunohomeostasis in diabetic wounds prolongs infiammation and cytokine dysfunction,thus,delaying or pre-venting wound-surface *** clinical studies have been conducted on cytokine-induced killer(CIK)cells recently,as they can be easily proliferated using a straightforward,inex-pensive ***,the function of CIK cells in regulat-ing inflammatory environments has been drawing attention for clinical *** the current investigation,we discovered the regenerative capacity of these cells in the chal-lenging environment of wounds that heal poorly due to *** demonstrated that the intravenous injection of CIK cells can re-establish a proregenerative inflammatory *** *** accelerateskin healing in diabetic *** results indicated that CIK cell treatment affects macrophage polarization and restores the function regenerative cells under hyperglycemic *** novel cellular therapy offers a promising intervention for clinical applic tions through specific inflammatory regulation functions.

关键词： macrophage diabetic wound post-traumatic inflammation cytokine-induced killer cells vascularization

Numerical investigation on critical length of impermeable plate below underwater pipeline under steady current

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Science China(Technological Sciences) 2013年第6期56卷 1232-1240页

作者： zhang zhiyong SHI Bing GUO YaKun YANG LiPeng College of Engineering Ocean University of China School of Engineering University of Aberdeen

This study proposes a new approach in which an impermeable plate is placed under the pipeline to prevent the local scour around the *** order to understand the performance of this approach,the finite volume method(FVM) and volume of fluid(VOF) method are adopted to simulate the flow field around the *** pressure distribution along the sandy bed surface is obtained by considering the variation of water ***,the effects of water depth,unidirectional and bidirectional impermeable plates on pressure difference are *** seepage flow field of sandy bed near underwater pipeline is numerically simulated using the laminar and porous media *** this basis,the effect of the impermeable plate length on hydraulic gradient is investigated and the critical length of impermeable plate is *** simulated results show that when the water depth is smaller than 5.00D(D is the diameter of pipeline),the effect of the water depth on the pressure difference is *** pressure differences between two endpoints of both the unidirectional and bidirectional plates decrease with the increase of the plate *** variations of the pressure differences for both the unidirectional and bidirectional plates are *** the increase of plate length,the hydraulic gradient decreases and the piping at the seepage exit is avoided effectively as long as it reaches a certain *** a critical length of the plate decreases with the increase of the water *** water depth is larger than 4.00D,the effect of the water depth on the critical length is *** the same water depth,the critical length of impermeable plate increases with the increase of the dimensionless flow *** simulation results are in good agreement with the available experimental measurements.

关键词： underwater pipeline steady current impermeable plate numerical simulation critical length

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ExExperimental and numerical studies on the prediction of bendability limit of QSTE340 welded tube in NC bending process

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Science China(Technological Sciences) 2012年第8期55卷 2264-2277页

作者： YANG He REN Ning ZHAN Mei zhang zhiyong QIN YaTao JIANG HaoMin DIAO KeShan CHEN XinPing State Key Laboratory of Solidification Processing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi'an 710072China Baosteel Group Corporation Shanghai 200122China

For a low carbon steel tube with small wall factor D/t and bending radius R,the over-thinning induced localized necking is one dominant failure in tube numerical control(NC) bending process,which strongly restricts the bendability limit of the *** addition,the deterioration of bendability of a tube is increased by the existence of the weak weld ***,an important issue is how to determinate and predict the welded tube bendability *** the present study,a finite element(FE) model with weld and subdivided heat affected zones under ABAQUS platform is employed to explore the deformation behaviors of welded tube NC bending.A localized necking criterion based on the critical thickness thinning is used to predict the critical principal strains,critical bending radius and burst location during the forming *** is found that the failures always occur at the rigid supporting point of mandrel flexible balls near the tangent point at the outside of the bend,where the wall thickness of the tube is the *** bending limit curves(BLCs) of the QSTE340 welded tube are obtained by shifting the standard shaped forming limit curve to the critical principal strains along the major strain *** between the numerical and experimental results has shown that the BLC and critical bending radius predictions agree well with the experimental *** addition,the effect of weld positions on BLC is discussed,the weld region shows an almost negligible effect on the forming limit at a non-critical location that is far away from the outside of the ***,when the weld is at the large tensile deformation region on the outside of the bend,a decrease of the forming limit strains is seen.

关键词： bendability limit welded tube NC bending FE simulation critical thickness thinning

How many sutures in the southern Central Asian Orogenic Belt:Insights from East Xinjiang-West Gansu(NW China)?

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Geoscience Frontiers 2014年第4期5卷 525-536页

作者： Wenjiao Xiao Chunming Han Wei Liu Bo Wan Ji'en zhang Songjian Ao zhiyong zhang Dongfang Song Zhonghua Tian Jun Luo Xinjiang Research Center for Mineral Resources Xinjiang Institute of Ecology and Geography.Chinese Academy of Sciences State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of Sciences

How ophiolitic mèlanges can be defined as sutures is controversial with regard to accretionary orogenesis and continental *** Chinese Altay,East junggar,Tianshan,and Beishan belts of the southern Central Asian Orogenic Belt（CAOB） in Northwest China,offer a special natural laboratory to resolve this *** the Chinese Altay,the Erqis unit consists of ophiolitic melanges and coherent assemblages,forming a Paleozoic accretionary *** least two ophiolitic melanges（Armantai,and Kelameili） in East Junggar,characterized by imbricated ophiolitic melanges,Nb-enriched basalts,adakitic rocks and volcanic rocks,belong to a Devonian-Carboniferous intra-oceanic island arc with some Paleozoic ophiolites,superimposed by Permian arc *** the Tianshan,ophiolitic melanges like Kanggurtag,North Tianshan,and South Tianshan occur as part of some Paleozoic accretionary complexes related to amalgamation of arc *** the Beishan there are also several ophiolitic melanges,including the Hongshishan,Xingxingxia-Shibangjing,Hongliuhe-Xichangjing,and Liuyuan ophiolitic *** ophiolitic melanges in the study area are characterized by ultramafic,mafic and other components,which are juxtaposed,or even emplaced as lenses and knockers in a matrix of some coherent *** tectonic settings of various components are different,and some adjacent units in the same melange show contrasting different tectonic *** formation ages of these various components are in a wide spectrum,varying from Neoproterozoic to *** we cannot assume that these ophiolitic melanges always form in linear sutures as a result of the closure of specific *** the ophiolitic components formed either as the substrate of intra-oceanic arcs,or were accreted as lenses or knockers in subduction-accretion *** published age and paleogeographic constraints,we propose the presence of （1） a major early Paleozoic tectonic boundary that separates the Chinese Altay-East

关键词： Major suture Paleogeographic separation Accretionary complex Intra-oceanic arc Southern CAOB

Volatile components,total phenolic compounds,and antioxidant capacities of worm-infected Gomphidius rutilus

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Food Science and Human Wellness 2018年第2期7卷 148-155页

作者： Libin Sun Wei He Guang Xin Pengju Cai Yin zhang zhiyong zhang Yunyun Wei Bingxin Sun Xiaowen Wen College of Food Science Shenyang Agricultural UniversityShenyang 110866China

This study evaluated the effects of worm infection on the volatile components,total phenolic compounds,and antioxidant capacities of Gomphidius *** without worms(GW),*** infected by a small amount of worms(GS;infected area50%)were *** volatile components of *** were analyzed by simultaneous distillation–extraction(SDE)and headspace solid-phase microextraction(HS-SPME)using gas chromatography–mass spectrometry(GC–MS).A total of 17 and 19 types of volatile compounds were detected,including ketones,alcohols,benzene,alkenes,aldehydes,esters,acids,and *** comprised the most abundant compound in GL,GS,and *** relative content of 1-octen-3-ol was the highest in all *** concentration of eight-carbon(C8)compounds relative to the total volatile compounds varied widely,ranging from 40%(GW)to 64.34%(GS)and 84.42%(GS)and to 91.59%(GL),respectively,among the three *** antioxidant capability and the total phenolic contents of *** were evaluated in this *** highest total phenolic content(TPC)of 192.23 mg GAE/g was found in GL,which differed significantly(P<0.05)from the latter two samples,whereas the lowest value of 156.11 mg GAE/g was found in *** radical cation scavenging activity,FRAP ferric reducing antioxidant capacity(FRAP)radical scavenging activity,and oxygen radical absorbance capacity(ORAC)were investigated to screen the antioxidant properties of *** contents of total phenolic compounds and their antioxidant capacities in vitro showed significant correlations(P<0.01).Among the three types of samples,the phenolic compounds of GL exhibited the highest antioxidant capacity,showing the values of 0.089 mM TE/g for ABTS,0.949 mM Fe^2+E/g for FRAP,and 1.952 M TE/g for ***,regarding the total antioxidant capacity,GS exhibited the highest antioxidant capacity,showing the values of 0.002648 mM TE/g for AB

关键词： Gomphidius rutilus Worm infection Volatile components Total phenolic Antioxidant capacity

Near infrared spectral and polarization imaging observation of coronal emission lines during the 2008 total solar eclipse

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Science China(Physics,Mechanics & Astronomy) 2009年第11期52卷 1794-1798页

作者： BAO XingMing zhang zhiyong DENG Jian HU KeLiang XUAN WeiJia LIU YangBing zhang HongQi DENG YuanYong WANG DongGuang WANG XiaoFan Key Laboratory of Solar Activity National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100012China

During the 2008 total solar eclipse, the coronal emission lines were observed by using optical fibre spectrometric and polarization imaging system in near infrared waveband. The profiles of the coronal emission lines including Fe XIII 10747 , 10798  and He I 10830  were obtained with dispersion of 0.5 /pix. The intensity of Fe XIII 10747  remained unchanged in the two different coronal regions while the intensity of He I 10830  varied considerably in the two coronal locations no matter whether the prominence appeared or not. The coronal polarization images were observed at Fe XI 7892  with a bandpass of 30  in a series of exposure times.

关键词： solar corona total solar eclipse coronal emission line polarization near infrared

Chemical constituents,pharmacological activities and quality evaluation methods of genus Hippocampus:A comprehensive review

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Chinese Herbal Medicines 2024年第3期16卷 344-357页

作者： zhiyong zhang Xiaoyang zhang Xi Wang Xuting Guo Xinhao Yan Zheng Li Wenlong Li College of Pharmaceutical Engineering of Traditional Chinese Medicine Tianjin University of Traditional Chinese MedicineTianjin 301617China State Key Laboratory of Component-based Chinese Medicine Tianjin University of Traditional Chinese MedicineTianjin 301617China Haihe Laboratory of Modern Chinese Medicine Tianjin 301617China

The genus Hippocampus is a multi-origin animal species with high medicinal and healthcare *** 57 species of Hippocampus spread worldwide,of which about 14 species can be used as medicine,showing anti-oxidation,anti-inflammation,anti-depressant,anti-hypertension,anti-prostatic hyperplasia,antivirus,anti-apoptotic,antifatigue,and so *** those pharmacological effects are mainly related to their active ingredients,including amino acids,abundant proteins(peptides and oligopeptides),fatty acids,nucleosides,steroids,and other small molecular *** main means of authentication of Hippocampus species are morphological identification,microscopic identification,thin layer chromatography method,fingerprint method and genomics *** review will provide useful insight for exploration,further study and precise medication of Hippocampus in the future.

关键词： chemical constituents Hippocampus pharmacological activities quality evaluation

Numerical Study of Flow Features Around Submerged Circular and Square Piles at Flat and Scoured Beds Using OpenFOAM

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Journal of Ocean University of China 2024年第4期23卷 897-914页

作者： WANG Chaolin WU Guoxiang WANG Dianhe DU Shengtao zhang zhiyong JIN Heng ZHU David Z. LIANG Bingchen Donghai Academy School of Civil&Environmental Engineering and Geography ScienceNingbo UniversityNingbo 315211China Key Laboratory of Estuary and Coast of Zhejiang Province and Zhejiang Institute of Hydraulics and EstuaryHangzhou 310020China Shandong Provincial Key Laboratory of Ocean Engineering and College of EngineeringOcean University of ChinaQingdao 266100China Shandong Water Conservancy Vocational College Rizhao 276826China School of Mechanical and Energy Engineering Ningbotech UniversityNingbo 315211China

Elucidating the flow features around piles in local scouring processes is crucial for studies of local scouring mechanisms and scour depth *** study details the flow turbulence characteristics of two submerged piles that are determined by solving the Navier-Stokes equations with the improved delayed detached eddy simulation *** model is verified by comparing experimental and numerical results for hydrodynamic parameters with the literature for both square-crossing piles(SCPs)and circular-crossing piles(CCPs).Original topographies of flat and scoured beds(i.e.,the initial and equilibrium scouring stages)are based on experimental results obtained by the authors in the present *** and CCP flow features in the scouring process are *** results indicate that during the scouring process,the time-averaged drag coefficient and root mean square(rms)of the lift coefficient increase linearly in the CCP test,while the rms of the lift coefficient in the SCP test decreases ***,the minimum pressure coefficient is always located in the upstream corners in the SCP case but moves from 72.5°to 79.5°when the scour hole is completely developed in the CCP *** flow behind the pile,which is generated by separated boundary layers above the top face of the pile,can reach the sand bed and turn the separated shear layers into patches of small vortices in the near-wake ***,the high shear stress zones are mainly at the scour edges under scoured-bed conditions.

关键词： flat bed scoured bed local scour OpenFOAM bed shear stress