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| 1 | Upregulation of Chemokine CXCL12 in the Dorsal Root Ganglia and Spinal Cord Contributes to the Development and Maintenance of Neuropathic Pain Following Spared Nerve Injury in Rats显示文摘Emerging evidence indicates that CXCL12/CXCR4 signaling is involved in chronic pain. However, few studies have systemically assessed its role in direct nerve injury-induced neuropathic pain and the underlying mechanism. Here, we determined that spared nerve injury(SNI)increased the expression of CXCL12 and its cognate receptor CXCR4 in lumbar 5 dorsal root ganglia(DRG)neurons and satellite glial cells. SNI also induced longlasting upregulation of CXCL12 and CXCR4 in the ipsilateral L4–5 spinal cord dorsal horn, characterized by CXCL12 expression in neurons and microglia, and CXCR4 expression in neurons and astrocytes. Moreover, SNIinduced a sustained increase in TNF-a expression in the DRG and spinal cord. Intraperitoneal injection(i.p.) of the TNF-a synthesis inhibitor thalidomide reduced the SNI-induced mechanical hypersensitivity and inhibited the expression of CXCL12 in the DRG and spinal cord.Intrathecal injection(i.t.) of the CXCR4 antagonist AMD3100, both 30 min before and 7 days after SNI,reduced the behavioral signs of allodynia. Rats given an i.t.or i.p. bolus of AMD3100 on day 8 of SNI exhibited attenuated abnormal pain behaviors. The neuropathic pain established following SNI was also impaired by i.t. administration of a CXCL12-neutralizing antibody. Moreover,repetitive i.t. AMD3100 administration prevented the activation of ERK in the spinal cord. The mechanical hypersensitivity induced in na?¨ve rats by i.t. CXCL12 was alleviated by pretreatment with the MEK inhibitor PD98059. Collectively, our results revealed that TNF-a might mediate the upregulation of CXCL12 in the DRG and spinal cord following SNI, and that CXCL12/CXCR4 signaling via ERK activation contributes to the development and maintenance of neuropathic pain. | Liying Bai Xinru Wang Zhisong Li Cunlong Kong Yonghui Zhao Jun-Liang Qian Quancheng Kan Wei Zhang Ji-Tian Xu | 2016 | Neuroscience Bulletin2016，32，1： | 20 |
| 2 | A study of internal solitary waves observed on the continental shelf in the northwestern South China Sea显示文摘Based on in-situ time series data from the acoustic Doppler current profiler (ADCP) and thermistor chain in Wenchang area, a sequence of internal solitary wave (ISW) packets was observed in September 2005, propagating northwest on the continental shelf of the northwestern South China Sea (SCS). Corresponding to different stratification of the water column and tidal condition, both elevation and depression ISWs were observed at the same mooring location with amplitude of 35 m and 25 m respectively in different days. Regular arrival of the remarkable ISW packets at approximately the diurnal tidal period and the dominance of diurnal internal waves in the study area, strongly suggest that the main energy source of the waves is the diurnal tide. Notice that the wave packets were all riding on the troughs and shoulders of the internal tides, they were probably generated locally from the shelf break by the evolution of the internal tides due to nonlinear and dispersive effects. | XU Zhenhua YIN Baoshu HOU Yijun FAN Zhisong Antony K LIU | 2010 | Acta Oceanologica Sinica2010，29，3： | 17 |
| 3 | A study of SAR remote sensing of internal solitary waves in the north of the South China Sea:Ⅰ.Simulation of internal tide transformation显示文摘For settlement of the well-known problem of contemporary radar imaging models,i.e.,the problem of a general underestimation of radar signatures of hydrodynamic features over oceanic internal waves and underwater bottom topography in tidal waters at high radar frequency bands(X-band and C-band),the impact of the ocean surface mixed layer turbulence and the significance of stratified oceanic model on SAR remote sensing of internal solitary waves are proposed.In the north of the South China Sea by utilizing some observed data of background field the nonlinearity coefficient,the dispersion coefficient,the horizontal variability coefficient and the phase speed in the generalized K-dV equation are determined approximately.Through simulations of internal tide transformation the temporal evolution and spatial distribution of the vertical displacement and horizontal velocity of internal wave field are obtained.The simulation results indicate that the maximum amplitudes of internal solitary waves occur at depth 35 m,but the maximum current speeds take place at depth 20 m in this area of the sea(about 20°30'N,114°E)in August.It was noticed that considering the effects of flood current and ebb current respectively is appropriate to investigate influence of the background shear flow on coefficients of the K-dV equation.The obtained results provide the possibility for the simulation of SAR signatures of internal solitary waves under considering the impact of ocean surface mixed layer turbulence in the companion paper. | FAN Zhisong ZHANG Yuanling SONG Mei | 2008 | Acta Oceanologica Sinica2008，27，4： | 12 |
| 4 | Toll-like receptor 4-mediated nuclear factor-κB activation in spinal cord contributes to chronic morphine-induced analgesic tolerance and hyperalgesia in rats显示文摘Nuclear factor kappa B(NF-κB) in the spinal cord is involved in pro-infl ammatory cytokine-mediated pain facilitation. However, the role of NF-κB activation in chronic morphine-induced analgesic tolerance and the underlying mechanisms remain unclear. In the present study, we found that the level of phosphorylated NF-κB p65(p-p65) was increased in the dorsal horn of the lumbar 4–6 segments after intrathecal administration of morphine for 7 consecutive days, and the p-p65 was co-localized with neurons and astrocytes. The expression of TNF-α and IL-1β was also increased in the same area. In addition, pretreatment with pyrrolidinedithiocarbamate(PDTC) or SN50, inhibitors of NF-κB, prevented the development of morphine analgesic tolerance and alleviated morphine withdrawal-induced allodynia and hyperalgesia. The increase in TNF-α and IL-1β expression induced by chronic morphine exposure was also partially blocked by PDTC pretreatment. In another experiment, rats receiving PDTC or SN50 beginning on day 7 of morphine injection showed partial recovery of the anti-nociceptive effects of morphine and attenuation of the withdrawal-induced abnormal pain. Meanwhile, intrathecal pretreatment with lipopolysaccharide from Rhodobacter sphae-roides, an antagonist of toll-like receptor 4(TLR4), blocked the activation of NF-κB, and prevented the development of morphine tolerance and withdrawal-induced abnormal pain. These data indicated that TLR4-mediated NF-κB activation in the spinal cord is involved in the development and maintenance of morphine analgesic tolerance and withdrawalinduced pain hypersensitivity. | Liying Bai Caihong Zhai Kun Han Zhisong Li Junliang Qian Ying Jing Wei Zhang Ji-Tian Xu | 2014 | Neuroscience Bulletin2014，30，6： | 10 |
| 5 | A study of SAR remote sensing of internal solitary waves in the north of the South China Sea:Ⅱ.Simulation of SAR signatures of internal solitary waves显示文摘A new model developed from the full-spectrum model of Lyzenga and Bennett (1988) is built up by us preliminarily through considering the impact of the ocean surface mixed layer turbulence on SAR remote sensing of internal solitary waves. In the partial differential equation of the action spectral density of the surface gravity-capillary waves the source function representing the contribution of the turbulence is added besides the usual source function representing the contribution of the wind. The source function is determined by applying the k-ε model and adopting the Nasmyth spectrum of oceanic turbulence (Nasmyth,1970; Oakey,1982; Fan,2002) on the basis of the previous simulation results of internal tide transformation obtained in the companion paper (Fan et al.,2008). Either under relatively high wind speed,or under low wind speed,our model predicts significant large modulations of radar backscatter at all three bands (L,C and X bands) for both VV and HH polarization. These results prove that considering the impact of ocean surface mixed layer turbulence on SAR remote sensing of internal solitary waves is reasonable and appropriate for settlement of the well-known problem of contemporary radar imaging models. | FAN Zhisong ZHANG Yuanling SONG Mei | 2008 | Acta Oceanologica Sinica2008，27，5： | 10 |
| 6 | MODIFIED GRAEB CRITERIA FOR PREDICTING THE POST-HEMORRHAGIC HYDROCEPHALUS IN INTRAVENTRICULAR HEMORRHAGE显示文摘Objective To set up a new grading system of intraventricular hemorrhage (IVH) and determine the value of predicting the probability of post-hemorrhagic hydrocephalus (PHH) in IVH. Methods We first modified the Graeb criteria, then compared the value of prediction for PHH assessed by the Graeb criteria with the modified Graeb criteria. One hundred and thirty one IVH patients were divided into two groups: the upper group (n=67) and the lower group (n=64). Gold standard of PHH was assessed by CT scan or by out-drainage. The diagno-stic parameters such as sensitivity (SE), specificity (SP) were analyzed. In the cutoff point of SE and SP curves, diagnostic efficiency (DE), and Kappa value (K) were analyzed. The probability of PHH was estimated by binary logistic regressions. Results In all ventricular group, to Graeb criteria in the cutoff point, SE, SP, and K was 0.78, 0.84, and 0.60; and to modified Graeb criteria SE, SP, and K was 0.90, 0.84, and 0.74 respectively. The probability of PHH from point of 3-12 was 0.011, 0.032, 0.085, 0.212, 0.435, 0.689, 0.865, 0.949, 0.981, and 0.994 respectively according to modified Graeb criteria. Conclusion The modified Graeb criteria combined with logistic regression were useful methods to assess the severity of IVH and to predict the probability of PHH in IVH. | ZhiSong Qi-dongYang Xiao-hongZi XuejunFan | 2004 | Chinese Medical Sciences Journal2004，19，2： | 6 |
| 7 | Efficacy of sunitinib in patients with metastatic renal cell carcinoma: initial experience in two Chinese centers显示文摘 | He Zhisong Guo Gang Zhang Cuijian Li Xuesong Fu Weijun Jin Jie Zhang Xu Zhou Liqun | 2014 | Chinese Medical Journal2014，，8： | 5 |
| 8 | A 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 | 2015 | Acta Oceanologica Sinica2015，34，1： | 4 |
| 9 | Effects of Tidal Currents on Nonlinear Internal Solitary Waves in the South China Sea显示文摘The propagation and fission process of internal solitary waves (ISWs) with amplitudes of about 170 m are simulated in the northeast of the South China Sea (NSCS) by using the generalized Korteweg-de Vries (KdV) equation under continuous stratification. More attention is paid to the effects of the ebb and flood background currents on the fission process of ISWs. This kind of background current is provided by the composed results simulated in terms of monthly mean baroclinic circulation and barotropic tidal current. It is found that the obtained relation of the number of fission solitons to the water depth and stratification is roughly in accordance with the fission law derived by Djordjevic and Redekopp in 1978; however, there exists obvious difference between the effects of the ebb and flood background currents on the wave-lengths of fission solitons (defined as the distance between two neighboring peaks of ISWs). The difference in nonlinearity coefficient α between the ebb and flood background currents is a main cause for the different wave-lengths of fission solitons. | FAN Zhisong SHI Xingang Antony K. Liu LIU Hailong LI Peiliang | 2013 | Journal of Ocean University of China2013，12，1： | 3 |
| 10 | Multi-view dimensionality reduction via canonical random correlation analysis显示文摘 | Yanyan ZHANG Jianchun ZHANG Zhisong PAN Daoqiang ZHANG | 2016 | Frontiers of Computer Science2016，10，5： | 3 |
| 11 | Mixture prepared with Chinese medicines in terms of releasing exterior cold and clearing interior heat: its efficacy and safety in patients with seasonal influenza-a randomized controlled trial显示文摘OBJECTIVE: To assess the efficacy and safety in 105 patients with seasonal Influenza in Beijing, the mixture prepared with Chinese medicines follows the treatment regimen of releasing exterior cold andclearing interior heat.METHODS: Total 330 patients with seasonal influenza were enrolled and randomly and averagely divided into the Chinese herbal medicine, the western medicine and the Chinese patent medicine group. They were treated with Chinese medicine Oseltamivir Phosphate Capsules and the Scattering Wind and Resolving Toxins Capsules. The main efficacy indicators were the antifebrile onset time and recovery time of body temperature. The efficacy and safety of the mixture was scientifically evaluated. Comparisons of several variables were analyzed.RESULTS: Median antifebrile onset time of the Chinese herbal medicine group was significantly shorter than the western medicine group(P < 0.05) and the Chinese patent medicine group(P < 0.05). The median antifebrile recovery time of the Chinese herbal medicine group was significantly shorter than the Chinese patent medicine group(P <0.05). The groups evaluated by TCM symptom pattern effect, both the Chinese herbal medicine group and Western Medicine group were better than the Chinese patent medicine group(P <0.05). The disappearance rate of main symptoms and some minor symptom patterns of the Chinese herbal medicine group were higher than the other 2 groups.CONCLUSION: The mixture of releasing exterior cold and clearing interior heat could significantly shorten the fever time with safety. | Wu Zhisong Li Guodong Wei Wan Liu Zhaoheng Wang Wei Ma Ruihong Liu Wenhong Ma Jiaju Wang Yuguang Jiao Yang | 2018 | Journal of Traditional Chinese Medicine2018，38，5： | 3 |
| 12 | Simulation model of SAR remote sensing of turbulent wake of semi-elliptical submerged body显示文摘In terms of the 2-dimensional hydrodynamic simplified model of a semi-elliptical submerged body moving horizontally at high speed, by using the full-spectrum model of SAR(synthetic aperture radar) remote sensing and taking the effect of oceanic interior turbulence on surface gravity capillary waves into account, applying the k-s model of turbulence with internal wave mixing, and adopting the Nasmyth spectrum of oceanic turbulence, the 2-dimensional simulation model of SAR remote sensing of this serni-elliptical submerged body is built up. Simulation by using this model at X band and C band is made in the northeastern South China Sea (21 00’N, 119 00’ E). Satisfactory results of the delay time and delay distance of turbulent surface wake of this semi-elliptical submerged body, as well as the minimum submerged depth at which this submerged body which cannot be discovered by SAR, are obtained through simulation. | FAN Zhisong | 2005 | Acta Oceanologica Sinica2005，24，5： | 3 |
| 13 | Riesz multiwavelet bases generated by vector refinement equation显示文摘In this paper, we investigate compactly supported Riesz multiwavelet sequences and Riesz multiwavelet bases for L2(Rs). Suppose ψ = (ψ1, . . . , ψr)T and ψ = ( ψ1, . . . , ψr)T are two compactly supported vectors of functions in the Sobolev space (Hμ(Rs))r for some μ > 0. We provide a characterization for the sequences {ψjk : = 1, . . . , r, j ∈ Z, k ∈ Zs} and {ψ jk : = 1, . . . , r, j ∈ Z, k ∈ Zs} to form two Riesz sequences for L2(Rs), where ψjk = mj/2ψ (M j ·k) and ψjk = mj/2 ψ (M j ·k), M is an s × s integer matrix such that limn→∞ Mn = 0 and m = |detM|. Furthermore, let = (1, . . . , r)T and = ( 1, . . . , r)T be a pair of compactly supported biorthogonal refinable vectors of functions associated with the refinement masks a, a and M, where a and a are finitely supported sequences of r × r matrices. We obtain a general principle for characterizing vectors of functions ψν = (ψν1, . . . , ψνr)T and ψν = ( ψν1, . . . , ψ?νr)T , ν = 1, . . . , m 1 such that two sequences {ψjνk : ν = 1, . . . , m 1, = 1, . . . , r, j ∈ Z, k ∈ Zs} and {ψ jνk : ν = 1, . . . , m 1, = 1, . . . , r, j ∈ Z, k ∈ Zs} form two Riesz multiwavelet bases for L2(Rs). The bracket product [f, g] of two vectors of functions f, g in (L2(Rs))r is an indispensable tool for our characterization. | LI Song LIU ZhiSong | 2009 | Science China Mathematics2009，52，3： | 3 |
| 14 | Dimensionality reduction via kernel sparse representation显示文摘基于稀少的表示,作为最热的研究之一,话题在最近的年里在许多应用完成了显著性能的维数减小(医生) 方法。然而,它的为存在稀少的表示的挑战基于方法由于在原来的空格寻求数据的稀少的表示的限制解决非线性的问题。由核诡计激发了,我们建议一个新框架把实验的核称为稀少的表示(EKSR ) 解决非线性的问题。在这个框架,非线性的可分离的数据被印射直到非线性的类似能在被捕获的内核空格,然后在内核空格的数据被稀少的表示重建保存稀少的结构,它被最小化获得一<潜水艇class=“ a-plus-plus ”> 1 规则化相关的客观功能。EKSR 提供新卓见进维数减小并且扩大二个模型:1 ) 实验的核稀少保存设计(EKSPP ) 它基于保存设计(SPP ) 的稀少是一个特征抽取方法;2 ) 实验的核稀少分数(EKSS ) 基于稀少 20 是一个特征选择方法,。两个能自动地二个方法选择邻居为稀少的表示的自然歧视的力量。与几存在途径相比,建议框架能减少计算复杂性并且在实践更方便。 | Zhisong PAN Zhantao DENG Yibing WANG Yanyan ZHANG | 2014 | Frontiers of Computer Science2014，8，5： | 3 |
| 15 | Important population viability analysis parameters for giant pandas(Aliuropoda melanoleuca)显示文摘Population viability analysis(PVA) is a tool to evaluate the risk of extinction for endangered species and aid conservation decision-making.The quality of PVA output is dependent on parameters related to population dynamics and life-history;however,it has been difficult to collect this information for the giant panda(Aliuropoda melanoleuca),a rare and endangered mammal native to China,confined to some 30 fragmented habitat patches.Since giant pandas are long-lived,mature late,have lower reproductive rates,and show little sexual dimorphism,obtaining data to perform adequate PVA has been difficult.Here,we develop a parameter sensitivity index by modeling the dynamics of six giant panda populations in the Minshan Mountains,in order to determine the parameters most influential to giant panda populations.Our data shows that the giant panda populations are most sensitive to changes in four female parameters:initial breeding age,reproductive rate,mortality rate between age 0 and 1,and mortality rate of adults.The parameter sensitivity index strongly correlated with initial population size,as smaller populations were more sensitive to changes in these four variables.This model suggests that demographic parameters of females have more influence on the results of PVA,indicating that females may play a more important role in giant panda population dynamics than males.Consequently,reintroduction of female individuals to a small giant panda population should be a high priority for conservation efforts.Our findings form a technical basis for the coming program of giant panda reintroduction,and inform which parameters are crucial to successfully and feasibly monitoring wild giant panda populations. | Minghao GONG Yanling SONG Zhisong YANG Chen LIN | 2012 | Zoological Research2012，33，3： | 3 |
| 16 | Grazing by wild giant pandas does not affect the regeneration of Arundinaria spanostachya显示文摘Arundinaria spanostachya is the main bamboo species on which giant pandas forage.Information on its regeneration capacity to meet the foraging demands of pandas is important to ensure the long-term survival of pandas.In 2014,2 plot types(grazed versus control)were selected in the winter habitat used by one wild giant panda.Various morphological and regeneration characteristics of the bamboo were assessed in the respective plots during 2014 and 2015.The panda avoided feeding on bamboo with a basal diameter of<6 mm,preferentially feeding on intermediate-sized bamboo.The density of new shoots and the recruitment rate of shoots were significantly higher in the grazed plots compared to the control plots.The annual recruitment rate of shoots was markedly higher than the annual mortality rate in the same plot type.After grazing,the basal diameter and height of new bamboo were similar between the 2 plots.In the grazed plots,the basal diameter of new bamboo was similar to that of the stumps.Innutrition and foraging by insects were the main factors influencing the survival of new shoots.Our results showed that grazing by giant pandas helped the clonal regeneration of A.spanostachya populations,with the basal diameter of new bamboo shoots meeting the foraging demand of pandas.However,information on the carrying capacity of A.spanostachya is necessary to ensure sufficient forage matter is available for reintroduced giant pandas.Furthermore,fertilization and insect control measures should be implemented during the shooting period to optimize A.spanostachya resources. | Longyan Zhang Xiaohong Gan Zhengyang Hou Zhisong Yang Zejun Zhang | 2019 | Journal of Forestry Research2019，30，4： | 2 |
| 17 | SEMI-SUPERVISED RADIO TRANSMITTER CLASSIFICATION BASED ON ELASTIC SPARSITY REGULARIZED SVM显示文摘Non-collaborative radio transmitter recognition is a significant but challenging issue, since it is hard or costly to obtain labeled training data samples. In order to make effective use of the unlabeled samples which can be obtained much easier, a novel semi-supervised classification method named Elastic Sparsity Regularized Support Vector Machine (ESRSVM) is proposed for radio transmitter classification. ESRSVM first constructs an elastic-net graph over data samples to capture the robust and natural discriminating information and then incorporate the information into the manifold learning framework by an elastic sparsity regularization term. Experimental results on 10 GMSK modulated Automatic Identification System radios and 15 FM walkie-talkie radios show that ESRSVM achieves obviously better performance than KNN and SVM, which use only labeled samples for classification, and also outperforms semi-supervised classifier LapSVM based on manifold regularization. | Hu Guyu Gong Yong Chen Yande Pan Zhisong Deng Zhantao | 2012 | Journal of Electronics(China)2012，29，6： | 2 |
| 18 | Mechanical property and microstructure of aluminum alloy-steel tubes joint by magnetic pulse welding显示文摘 | Haiping Yu Zhidan Xu Zhisong Fan Zhixue Zhao Chunfeng Li | 2013 | Materials Science & Engineering A2013，，： | 2 |
| 19 | Is the small-scale turbulence an exclusive breaking product of oceanic internal waves显示文摘On the basis of the theoretical research results by the author and the literature published up to date, the analysis and the justification presented in this paper show that the breaking products of oceanic internal waves are not only turbulence, but also the fine-scale near-inertial internal waves (the oceanic reversible finestructure) for inertial waves and the internal solitary waves for internal tides respectively. It was found that the oceanic reversible finestructure may be induced by the effect of the horizontal component f (f = 2Ωcosφ) of the rotation vector on inertial waves. And a new instability of the theoretical shear and strain spectra due to the effect of f occurs at critical vertical wavenumber β c ≈ 0.1 cpm. It happens when the levels of shear and strain of the reversible finestructure are higher than those of inertial waves, which is induced by the effect of f along an 'iso-potential-pycnal' of internal wave. If all breaking products of internal waves are taken into account, the average kinetic energy dissipation rate is an order of magnitude larger than the values of turbulence observed by microstructure measurements. The author's theoretical research results are basically in agreement with those observed in IWEX, DRIFTER and PATCHEX experiments. An important impersonal fact is that on the mean temporal scale of thermohaline circulation these breaking products of internal waves exist simultaneously with turbulence. Because inertial waves are generated by winds at the surface, and internal tides are generated by strong tide-topography interactions, the analysis and justification in this paper support in principle the abyssal recipes Ⅱ:energetics of tidal and wind mixing by Munk & Wunsch in 1998, in despite of the results of microstructure measurements for the turbulent kinetic energy dissipation rate and the diapycnal turbulent eddy diffusivity. | FAN Zhisong | 2011 | Acta Oceanologica Sinica2011，30，6： | 2 |
| 20 | Effect of Tm-Er concentration ratio on the photoluminescence of Er-Tm:Al_2O_3 thin films fabricated by pulsed laser deposition显示文摘Er-Tm codoped amorphous aluminum oxide(a-Al2O3)thin films have been prepared by an alternative pulsed laser deposition.The phase structure and the surface of the deposited thin films were characterized by the X-ray diraction(XRD)and scanning electron microscopy(SEM),respectively.Eective photoluminescence(PL)in the region of 350-900 nm was observed when pumped at 325 nm,and the PL performance has been improved by modifying the Tm3 +concentration.With the increasing of[Tm]/[Er]concentra-tion ratio,the intensity of emission of 382 nm and 500 nm bands was improved eectively while that of 765 nm band increased smoothly.Our results suggest that the resonant energy transfer and cross relaxation between Tm3 +and Er 3+play an important role in the evolution of the luminescent response. | Bo Zhou Zhisong Xiao Anping Huan Lu Yan Fang Zhu Jinliang Wang Penggang Yin Hao Wang | 2008 | Progress in Natural Science:Materials International2008，18，6： | 2 |
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