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25篇 您的检索式:作者名="RUIJIN LIU"
    题名 作者 年代 出处 被引量
1An Eperimental Study on the Transplantation of Human Fetal Brain Cells into Monkey Models of Parkinson's Disease.显示文摘Unilateral administration of methly-phenyl-tetrahydropyridine(MPTP) into the common carotidLiu Zhengou, et al. Dept Neur Ruijin, Hospital. Shanghai Second Med Uni, Shanghai 200025, Chin J Neuro Psych 1994 1995Chinese Medical Journal1995,,2:34
2Energy-Efficient UAV Trajectory Design for Backscatter Communication: A Deep Reinforcement Learning Approach显示文摘Recently,backscatter communication(BC)has been introduced as a green paradigm for Internet of Things(IoT).Meanwhile,unmanned aerial vehicles(UAVs)can serve as aerial base stations(BSs)to enhance the performance of BC system thanks to their high mobility and flexibility.In this paper,we investigate the problem of energy efficiency(EE)for an energy-limited backscatter communication(BC)network,where backscatter devices(BDs)on the ground harvest energy from the wireless signal of a flying rotary-wing quadrotor.Specifically,we first reformulate the EE optimization problem as a Markov decision process(MDP)and then propose a deep reinforcement learning(DRL)algorithm to design the UAV trajectory with the constraints of the BD scheduling,the power reflection coefficients,the transmission power,and the fairness among BDs.Simulation results show the proposed DRL algorithm achieves close-to-optimal performance and significant EE gains compared to the benchmark schemes.Yiwen Nie Junhui Zhao Jun Liu Jing Jiang Ruijin Ding 2020China Communications2020,17,10:5
3A parameterization scheme of vertical mixing due to inertial internal wave breaking in the ocean general circulation model显示文摘Based on the theoretical spectral model of inertial internal wave breaking(fine structure) proposed previously, in which the effects of the horizontal Coriolis frequency component f-tilde on a potential isopycnal are taken into account, a parameterization scheme of vertical mixing in the stably stratified interior below the surface mixed layer in the ocean general circulation model(OGCM) is put forward preliminarily in this paper. Besides turbulence, the impact of sub-mesoscale oceanic processes(including inertial internal wave breaking product) on oceanic interior mixing is emphasized. We suggest that adding the inertial internal wave breaking mixing scheme(F-scheme for short) put forward in this paper to the turbulence mixing scheme of Canuto et al.( T-scheme for short) in the OGCM, except the region from 15°S to 15°N. The numerical results of F-scheme by using WOA09 data and an OGCM(LICOM, LASG/IAP climate system ocean model) over the global ocean are given. A notable improvement in the simulation of salinity and temperature over the global ocean is attained by using T-scheme adding F-scheme, especially in the mid- and high-latitude regions in the simulation of the intermediate water and deep water. We conjecture that the inertial internal wave breaking mixing and inertial forcing of wind might be one of important mechanisms maintaining the ventilation process. The modeling strength of the Atlantic meridional overturning circulation(AMOC) by using T-scheme adding F-scheme may be more reasonable than that by using T-scheme alone, though the physical processes need to be further studied, and the overflow parameterization needs to be incorporated. A shortcoming in F-scheme is that in this paper the error of simulated salinity and temperature by using T-scheme adding F-scheme is larger than that by using T-scheme alone in the subsurface layer.FAN Zhisong SHANG Zhenqi ZHANG Shanwu HU Ruijin LIU Hailong 2015Acta Oceanologica Sinica2015,34,1:4
4A Heat Budget Study on the Mechanism of SST Variations in the Indian Ocean Dipole Regions显示文摘By using a new heat budget equation that is closely related to the sea surface temperature (SST) and a dataset from an ocean general circulation model (MOM2) with 10-a integration (1987-1996), the relative importance of various processes determining SST variations in two regions of the Indian Ocean is compared. These regions are defined by the Indian Ocean Dipole Index and will be referred to hereafter as the eastern (0°-10°S, 90°-110°E) and western regions (10°S-10°N, 50°-70°E), respectively. It is shown that in each region there is a falling of SST in boreal summer and a rising in most months of other seasons, but the phases are quite different. In the eastern region, maximum cooling rate occurs in July,whereas in the western region it occurs in June with much larger magnitude. Maximum heating rate occurs in November in the eastern region, but in March in the western one. The western region exhibits another peak of increasing rate of SST in October, indicating a typical half-year period. Net surface heat flux and entrainment show roughly the same phases as the time-varying term, but the former has much larger contribution in most of a year, whereas the latter is important in the boreal summer. Horizontal advection, however, shows completely different seasonal variations as compared with any other terms in the heat budget equation. In the eastern region, it has a maximum in June/November and a minimum in March/September, manifesting a half-year period; in the western region, it reaches the maximum in August and the minimum in November. Further investigation of the horizontal advection indicates that the zonal advection has almost the opposite sign to the meridional advection. In the eastern region, the zonal advection is negative with a peak in August, whereas the meridional one is positive with two peaks in June and October. In the western region, the zonal advection is negative from March to November with two peaks in June and November, whereas the meridional one is positive with one peak in July.Different phases can be clearly seen between the two regions for each component of the horizontal advection. A detailed analysis of the data of 1994, a year identified when the Indian Ocean dipole event happened, indicates that the horizontal advection plays a dominant role in the remarkable cooling of the eastern region, in which zonal and meridional advections have the same sign of anomaly. However, in the western region in 1994 no any specialty was shown as compared with other years, for the SST anomaly is not positive in large part of this region. All these imply that the eastern and western regions may be related in a quite complex way and have many differences in dynamics. Further study is needed.HU Ruijin LIU Qinyu LI Chongyin 2005Journal of Ocean University of China2005,4,4:3
5Multi-site occupancies and luminescence properties of cyan-emitting Ca_(9-x)NaGd_(2/3)(PO_(4))_(7):Eu^(2+)phosphors for white light-emitting diodes显示文摘Cyan-emitting Ca_(9)NaGd_(2/3)(PO_(4))_(7):Eu^(2+)phosphors were synthesized via high temperature solid-state route.X-ray powder diffraction(XRD)and scanning electron microscopy(SEM)were used to verify the phase and morphology of the Ca_(9)NaGd_(2/3)(PO_(4))_(7):Eu^(2+)(CNGP:Eu^(2+))phosphors.The as-obtained phosphor exhibits a broad excitation band of 250-420 nm,which is near the ultraviolet region.An intense asymmetric cyan emission at 496 nm corresponds to the 5 d-4 f transition of Eu^(2+).The multiplesite luminescent properties of Eu^(2+)ions in CNGP benefit from versatile structure ofβ-Ca3(PO4)2 compounds.The effective energy transfer distance is 5.46 nm(through the spectral overlap calculation),validating that the resonant energy migration type is via dipole-dipole interaction mechanism.Compared to the initial one at room temperature,the luminescent intensity of CNGP:Eu^(2+)phosphor can maintain 77%as it is heated up to 420 K.A white light-emitting diode(WLED)with excellent luminesce nt properties was successfully fabricated.Moreover,the CIE chromaticity coordinates of fabricated WLED driven by changing current just change slightly.Shihua Liu Bin Deng Junhui Yang Jinhua Liu Jun Chen Fanhua Zeng Huanyou Wang Ruijin Yu Gongguo Zhang 2022Journal of Rare Earths2022,40,2:1
6Microwave Heating in Preparation of Magnetic Molecularly Imprinted Polymer Beads for Trace Triazines Analysis in Complicated Samples显示文摘Yi Zhang Ruijin Liu Yuling Hu 2009Anal Chem2009,81,:1
7Dopant concentration dependence of structure, optical, and magnetic properties of ZnO:Fe thin films显示文摘Ruijin Hong Herui Wen Caiming Liu Jinglin Chen Jinsheng Liao 2010Journal of Crystal Growth2010,,1:1
8Study on the detection method of holes in composite insulator rods显示文摘The holes in composite insulator rods are a type of quality defects.However,not all holes can be identified by the dye penetration test according to existing standards and some holes can cause abnormal heating of the composite insulator during operation.Micro‐computed tomography is used to study the structure of these holes.Based on the pore structure,the holes are classified as dependent or independent.The dependent hole is formed by several interconnected adjacent pores and the overlong equivalent penetration path makes it cannot be effectively identified by the standard dye penetration test.Considering the structure of the dependent hole,ethanol gas was used to increase the effectiveness of the dye penetration test.The experimental results show that the detection rate of dependent holes is approximately 80%as the ethanol concentration is close to saturation,and the porosity can be inferred based on the number of penetration points.Sida Zhang Li Cheng Yunfan Liu Ruijin Liao Tingting Wang Huan Huang 2021High Voltage2021,6,5:1
9Spectral properties and Judd-Ofelt analysis of novel red phosphors Gd_(2)InSbO_(7):Eu^(3+)with high color purity for white LEDs显示文摘Gd_(2)InSbO_(7):Eu^(3+)red phosphors we re successfully synthesized via high-temperature solid-state reactio n.The phase purity,particle size,and luminescence properties of obtained phosphors were measured and analyzed in detail.The Gd_(2)InSbO_(7)lattice possesses cubic structure with F_(d-3 m)(227)space group.The phosphors emit bright red emission at 628 nm under 393 nm excitation,and this phenomenon is attributed to the^(5)D0-^(7)F_(2)transition.The Judd-Ofelt parameters(Ω_(2),Ω_(4)),transition ratio,and branching ratios(β)of Eu^(3+)-doped Gd_(2)InSbO_(7)phosphor were calculated on the basis of the emission spectra and decay lifetimes.The optimal content in Gd_(2)InSbO_(7):xEu^(3+)is identified to be 15 mol%.The thermal quenching of Gd_(2)InSbO_(7):Eu^(3+)is found to be over 500 K,and its activation energy is 0.26 eV.The Commission Internationale de l’Eclairage(CIE)chromaticity coordinates of Gd_(2)InSbO_(7):15%Eu^(3+)are(0.629,0.371),which are close to ideal red chromaticity coordinates(0.670,0.330).The fabricated w-LED exhibits good color rendering index(Ra)(86),correlated color temperature(CCT)(6997 K),and CIE chromaticity coordinates(0.302,0.330).The obtained results demonstrate that Gd_(2)InSbO_(7):Eu^(3+)phosphors have potential applications in white LEDs.Yu Wang Baokui Zhao Bin Deng Shanshan Chen Yuanyuan Liu a Guodong Wang Ruijin Yu 2021Journal of Rare Earths2021,39,11:1
10Microwave heating in preparation of magnetic molecularly imprinted polymer beads for trace triazines analysis in complicated samples显示文摘Zhang Yi Liu Ruijin Hu Yuling 2009Analytical Chemistry2009,81,3:1
11Quantitative analysis of insulation condition of oil-paper insulation based on frequency domain spectroscopy显示文摘Liao Ruijin Liu Jiefeng Yang Lijun 2015IEEE Transactions on Dielectrics and Electrical Insulation2015,22,1:1
12COX-2 expression is correlated with VEGF-C, lymphangiogenesis and lymph node metastasis in human cervical cancer显示文摘Huidong Liu Jianbing Xiao Yanmei Yang Yan Liu Ruijin Ma Yuhang Li Fengchun Deng Yafang Zhang 2011Microvascular Research2011,,:1
13Assessing Strategy of Power Transformers Insulation State Based on Part-division and Entropy Method显示文摘Failure mechanisms of power transformers are complex and uncertain; it is difficult to determine index weights of insulation state. Therefore, it is a challenge to acquire an accurate assessment of insulation state of power transformers. In this paper, an assessing strategy for transformer insulation is proposed base on part-division of transformer and a comprehensive weight determination method. An index system of transformer is established on the basis of part-division of transformer. Each index’s weight is consisted of two parts, the constant weight and the variable weight, which are determined by improved analytic hierarchy process (AHP) and entropy method respectively. Af- ter categorizing insulation state into four levels and standardizing assessing indexes, a Cauchy membership function is forged, and a fuzzy algorithm is employed to simulate the uncertainty of the insulation state. Finally, a confidence criterion is employed to perform part-division based condition assessment of transformer. Case studies reveal that the proposed assessing strategy method is effective, convenient, and practical; with the new strategy, potential failures of transformers can be forecasted and insulation state of transformer parts can also be as- sessed. Furthermore, the assessing results can be used to guide condition-based maintenance.LIAO Ruijin LIU Bin ZHANG Yiyi YANG Lijun ZHENG Hanbo 2013高电压技术2013,39,8:1
14“Golden Course” Construction of Software Engineering Basic Course Based on Blended Learning显示文摘“Golden Courses”is the current driving force for deepening the reform of higher education and accelerating the construction of first-class undergraduate education.This paper is based on the education and teaching philosophy of higher education of software,and for the purpose of the national first-class curriculum construction of blended teaching.Taking the course of software engineering as an example,it explored to establish a framework of“Four-Phase Iteration”and“Dual Elements and Combination”curriculum,along with the combination of online and offline teachingmethods and practices.Exploration and practice of the curriculum constructionwas implemented from the aspects of the curriculum design,teaching content,course resources,teaching methods,diversified evaluation and feedback,etc.It is proved to realize the development of“golden course”construction of blended teaching and deepen the reform in education.Zufeng Wu Tian Lan Ruijin Wang Xiaohua Wu Qiao Liu 2021国际计算机前沿大会会议论文集2021,,2:0
15Investigation of Abnormal Grain Growth in Sintered Nd-Fe-B Permanent Magnet显示文摘The abnormal growth of grains of sintering Nd13.6 Dy0.4 Fe79.5 B6.5 magnets were investigated in low oxygen manufacturing process.The abnormal growth of grains occurs easily when the sintering temperature is higher than 1080℃ during the manufacture process.In the magnets, the oxygen content is less than 700 × 10-6 and the average particle size of powder is smaller than 4 μm.The squareness of demagnetization curve of magnet is deteriorated.For high performance magnets, the abnormal growth grain should be avoided by selecting a suitable sintering temperature.Liu Guozheng Liu Shufeng Wu Bin Lu Weidong Zhao Mingjing Lu Fuqiang Zhao Ruijin 2004Journal of Rare Earths2004,22,z1:0
16HSA-MIR-203/MyD88 axis mediates the protective effect of hispidulin on LPS-induced apoptosis in a human renal tubular epithelial line,HK-2显示文摘Acute kidney injury(AKI),commonly occurring as complications of sepsis,cardiac surgery,and liver or kidney transplantation,is a critical care syndrome.It is well known that lipopolysaccharide(LPS)shock is a common triggering factor for AKI.This study is aimed to examine the effect of flavonoid compound hispidulin on LPS-induced AKI.For this,renal tubular epithelial cell HK-2 was treated with LPS to establish an in vitro model of AKI.The effect of hispidulin on HK-2 cell viability was examined using CCK-8 assay.Cell apoptosis was determined by TUNEL and flow cytometry.Apoptosis marker proteins were determined by using western blot.The levels of pro-inflammatory cytokines were determined by ELISA assay and qRT-PCR.The translocation of NF-κB was determined by western blot.The effect of MyD88 on the cytoprotective activities of hispidulin was examined by overexpressing MyD88 in HK-2 cells.Our results showed that hispidulin was not able to produce a cytotoxic effect on HK-2 cells at tested concentrations.However,hispidulin could protect HK-2 cells from LPS-induced cell injury.Our results also showed that hispidulin was able to attenuate LPS-induced HK-2 cell apoptosis.In addition,LPS led to an inflammatory response in HK-2 cells,evidenced by NF-κB p65 activation as well as increased expression and release of inflammatory cytokine IL-6 and TNF-α,which could be reversed by pretreatment with hispidulin.Overexpression MyD88 was found to significantly dampen the cytoprotective activities of hispidulin against LPS insult.More importantly,MyD88 was identified as a direct target of hsa-miR-203,and hispidulin was found to regulate the expression of MyD88 via upregulating hsa-miR-203.Our results showed that hispidulin attenuates LPS-induced HK-2 damage via regulating hsa-miR-203/MyD88 axis.SICONG WANG RUIJIN LIU QIUYUAN HAN KAIJIANG YU 2022BIOCELL2022,46,1:0
17Gas production mechanism of Irgamet 39 and its long‐term corrosion resistance显示文摘The phenomenon of transformer failure caused by oil‐sulphur corrosion of oil₋paper insulation system has always been concerned by scholars.Irgamet 39 is the most used metal passivator for inhibiting sulphur corrosion.However,Irgamet 39 causes abnormal dissolved gas in oil during the process of exerting anti‐corrosion effect.Herein,the gas production mechanism of Irgamet 39 and its long‐term corrosion resistance were investigated.Compared with other metal passivators,the Irgamet 39 produces more dissolved gases in oil,especially H_(2),CO and CO_(2).The main sources of free radicals in the gas production process are from the branched chains of the Irgamet 39 structure(−CH_(2)N(C_(8)H_(17))_(2)and−CH_(3)).Furthermore,the ageing products of insulating paper and oil promote the cleavage of the chain in the Irgamet 39 molecule,which then causes Irgamet 39 to generate more dissolved gases.Irgamet 39 exhibits excellent long‐term corrosion inhibition properties,while it also leads to abnormal gases in the oil,which can affect the interpretation of the dissolved gas analysis data and thus interfere with the diagnosis.This work provides useful information for the practical application of Irgamet 39 and helps electrical workers make reasonable predictions for transformer problems.Huiying Xiang Yuan Yuan Guoyong Liu Xue Gao Cheng Zhang Jiang Zhou Ruijin Liao 2023High Voltage2023,8,5:0
18Eu^2+-doped Sr5(PO4)3Br blue-emitting phosphor with high color purity for near-UV-pumped white light-emitting diodes显示文摘Eu^(2+)-doped bromophosphateapatite Sr_5(PO_4)3 Br phosphors were synthesized by the conventional hightemperature solid-state reaction.The crystal structure and luminescence properties of the phosphors,as well as their thermal stability and CIE chromaticity coordinates were systematically investigated.Photoluminescence spectra of Sr_5(PO_4)3 Br:Eu^(2+) exhibit a single blue emission at 450 nm under the excitation of 345 nm,which is ascribed to the 4 f-5 d transition of Eu^(2+).The phosphor shows very good thermal stability; The CIE color coordinates are very close to those of BaMgAl_(10)O_(17):Eu^(2+)(BAM).All the properties indicate that the blue-emitting Sr_5(PO_4)_3 Br:Eu^(2+) phosphor has potential application in white LEDs.Zhiwen Gao Shihua Liu Pengfei Sun Jung Hyun Jeong Ruijin Yu Bin Deng 2018Journal of Rare Earths2018,36,9:0
19Flat-band ferromagnetism of SU(N) Hubbard model on Tasaki lattices显示文摘We investigate the para-ferro magnetic transition of the repulsive SU(N) Hubbard model on a type of oneand two-dimensional decorated cubic lattices, referred as Tasaki lattices, which feature massive singleparticle ground state degeneracy. Under certain restrictions for constructing localized many-particle ground states of flat-band ferromagnetism, the quantum model of strongly correlated electrons is mapped to a classical statistical geometric site-percolation problem, where the nontrivial weights of different configurations must be considered. We prove rigorously the existence of para-ferro transition for the SU(N) Hubbard model on one-dimensional Tasaki lattice and determine the critical density by the transfer-matrix method. In two dimensions, we numerically investigate the phase transition of SU(3),SU(4) and SU(10) Hubbard models by Metropolis Monte Carlo simulation. We find that the critical density exceeds that of standard percolation, and increases with spin degrees of freedom, implying that the effective repulsive interaction becomes stronger for larger N. We further rigorously prove the existence of flat-band ferromagnetism of the SUeNT Hubbard model when the number of particles equals to the degeneracy of the lowest band in the single-particle energy spectrum.Ruijin Liu Wenxing Nie Wei Zhang 2019Science Bulletin2019,64,20:0
20cDNA-AFLP analysis reveals altered gene expression profiles involved in juice sac granulation in pummelo(Citrus grandis)显示文摘Citrus fruits produced in China are often affected by granulation.Granulation is an altered physiological state of citrus fruits occurring usually before harvest but whose underlying mechanisms remain elusive.In this study,cDNA-AFLP technology enabled the identification of 116 granulation-associated genes in pummelo(C.grandis)juice sacs.Differentially expressed transcript-derived fragments(TDFs)were shown to be mainly involved in biological regulation and signal transduction,carbohydrate and energy metabolism,nucleic acid,protein metabolism,stress responses,and cell metabolism.Therefore,granulation in pummelo juice sacs seems to involve the following alterations:(1)changes in hormone levels;(2)activation of metabolic pathways related to ATP and sugar synthesis to produce more energy;(3)nucleic acid accumulation and increased protein degradation;(4)activation of stress-responsive metabolic pathways;(5)accelerated juice sac senescence.Our findings provide an overview of differential responses occurring at the transcriptional level in granulated juice sacs,thus revealing new insights into the adaptive mechanisms underlying this altered physiological state in‘Guanximiyou'pummelo(C.grandis)juice sacs.Xianyou Wang Longlong Guo Ruijin Zhou Yunli Liu Huiling Hu Ping Wang 2022Fruit Research2022,2,1:0
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