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| 1 | Response regimes of nonlinear energy harvesters with a resistorinductor resonant circuit by complexification-averaging method显示文摘In this paper, the steady-state response regimes of nonlinear energy harvesters with a resistor-inductor resonant circuit are theoretically investigated. The complexification averaging(CA) method is used to theoretically analyze the energy harvesting performance and reduce the motion equations into a set of first-order differential equations. The amplitudes and phases of both the response displacement and the output voltage are derived, and the corresponding stability conditions are determined. The response regimes are studied with the variation of nonlinear stiffness coefficients and coupling parameters, which are verified by the time domain analysis. The frequency island phenomenon is found and analyzed. Additionally, the backbone curve for deducing the extreme vibration frequency and amplitude is derived. Simultaneously, the analytical expressions of the switching points(critical amplitude and frequency) to identify the hardening and softening properties are established. Accordingly, a criterion is given to determine the occurrence of the jump phenomenon, and its effectiveness is verified. Overall, this paper presents an in-depth theoretical analysis of nonlinear energy harvesters with a resistor-inductor resonant circuit. It presents the theoretical framework and guidance for more extensive evaluations and understanding the theoretical analysis of nonlinear energy harvesters with external circuits. | HUANG DongMei CHEN JiaYi ZHOU ShengXi FANG XueLai LI Wei | 2021 | Science China(Technological Sciences)2021，64，6： | 6 |
| 2 | Effects of soil stoichiometry of the CaCO_3/available phosphorus ratio on plant density in Artemisia ordosica communities显示文摘In soil, CaCO3 can reduce the availability of phosphorus in arid and semi-arid regions, thereby influencing plant growth. However, the effects of soil stoichiometry of the CaCO3/available phosphorus ratio (CaCO3/AP ratio) on plant density are unknown. In this study, we examined 4 Artemisia ordosica communities located in arid and semi-arid regions, and performed a pot experiment with an orthogonal design to examine the relationships between the soil CaCO3/AP ratio and plant density. The results showed that the soil stoichiometry of the CaCO3/AP ratio had a greater effect on growth of A. ordosica than either CaCO3 or AP as single factor. The influence of the soil CaCO3/AP ratio on density of A. ordosica was related to the climatic zone and the types and/or amplitudes of increases in the soil CaCO3/AP ratio. When the soil CaCO3/AP ratio was within the same amplitude and was less than 2.5, the A. ordosica density increased in the semi-arid region, whereas the density decreased with increasing soil CaCO3/AP ratios in the arid region. In the semi-arid region, when the soil CaCO3/AP ratio was within the same amplitude and the increase in the soil CaCO3 content was greater than the increase in soil AP, the A. ordosica density increased with increasing soil CaCO3/AP ratios. This means that the relationship between the soil CaCO3/AP ratio and the A. ordosica density remained the same. In the arid region, an increase in the soil CaCO3/AP ratio as a result of increased soil CaCO3 content and decreased soil AP resulted in increased density of A. ordosica. Therefore, the relationship between soil CaCO3/AP ratios and density of A. ordosica was altered by these changes in soil chemistry. Thus, the soil stoichiometry of the CaCO3/AP ratio is an important factor affecting the density of A. ordosica in arid and semi-arid regions. | ZHAO XueLai HE XingDong XUE PingPing ZHANG Ning WU Wei LI Rong CI HuaCong XU JingJing GAO YuBao ZHAO HaLin | 2012 | Chinese Science Bulletin2012，57，5： | 2 |
| 3 | Low temperature fabrication of V-doped TiO2 nanoparticles, structure and photocatalytic studies显示文摘 | LIU Baoshun WANG Xuelai CAI Guofa | 2009 | Journal of Hazardous Materials2009，169，： | 1 |
| 4 | Low temperature fabrication of V-doped TiO 2 nanoparticles, structure and photocatalytic studies显示文摘 | Baoshun Liu Xuelai Wang Guofa Cai Liping Wen Yanbao Song Xiujian Zhao | | Journal of Hazardous Materials0，，1： | 1 |
| 5 | p55PIK-PI3K stimulates angiogenesis in colorectal cancer cell by activating NF-κB pathway显示文摘 | Guihua Wang Cheng Chen Rui Yang Xiaonian Cao Senyan Lai Xuelai Luo Yongdong Feng Xianmin Xia Jianping Gong Junbo Hu | 2013 | Angiogenesis2013，，3： | 1 |
| 6 | c-Myc enhances colon cancer cell-mediated angiogenesis through the regulation of HIF-1α显示文摘 | Cheng Chen Shaoxin Cai Guihua Wang Xiaonian Cao Xi Yang Xuelai Luo Yongdong Feng Junbo Hu | 2012 | Biochemical and Biophysical Research Communications2012，，： | 1 |
| 7 | Phenotypic plasticity of Artemisia ordosica seedlings in response to different levels of calcium carbonate in soil显示文摘Plant phenotypic plasticity is a common feature that is crucial for explaining interspecific competition, dynamics and biological evolution of plant communities. In this study, we tested the effects of soil CaCO_3(calcium carbonate) on the phenotypic plasticity of a psammophyte, Artemisia ordosica, an important plant species on sandy lands in arid and semi-arid areas of China, by performing pot experiments under different CaCO_3 contents with a two-factor randomized block design and two orthogonal designs. We analyzed the growth responses(including plant height, root length, shoot-leaf biomass and root biomass) of A. ordosica seedlings to different soil CaCO_3 contents. The results revealed that, with a greater soil CaCO_3 content, A. ordosica seedlings gradually grew more slowly, with their relative growth rates of plant height, root length, shoot-leaf biomass and root biomass all decreasing significantly. Root N/P ratios showed significant negative correlations with the relative growth rates of plant height, shoot-leaf biomass and root length of A. ordosica seedlings; however, the relative growth rate of root length increased significantly with the root P concentration increased, showing a positive correlation. These results demonstrate that soil CaCO_3 reduces the local P availability in soil, which produces a non-adaptive phenotypic plasticity to A. ordosica seedlings. This study should prove useful for planning and promoting the restoration of damaged/degraded vegetation in arid and semi-arid areas of China. | XUE Pingping ZHAO Xuelai GAO Yubao HE Xingdong | 2019 | Journal of Arid Land2019，11，1： | 1 |
| 8 | Hybrid Differential Evolution for Estimation of Kinetic Parameters for Biochemical Systems显示文摘Determination of the optimal model parameters for biochemical systems is a time consuming iterative process. In this study, a novel hybrid differential evolution (DE) algorithm based on the differential evolution technique and a local search strategy is developed for solving kinetic parameter estimation problems. By combining the merits of DE with Gauss-Newton method, the proposed hybrid approach employs a DE algorithm for identifying promising regions of the solution space followed by use of Gauss-Newton method to determine the optimum in the identified regions. Some well-known benchmark estimation problems are utilized to test the efficiency and the robustness of the proposed algorithm compared to other methods in literature. The comparison indicates that the present hybrid algorithm outperforms other estimation techniques in terms of the global searching ability and the convergence speed. Additionally, the estimation of kinetic model parameters for a feed batch fermentor is carried out to test the applicability of the proposed algorithm. The result suggests that the method can be used to estimate suitable values of model parameters for a complex mathematical model. | ZHAO Chao XU Qiaoling LIN Siming LI Xuelai | 2013 | Chinese Journal of Chemical Engineering2013，21，2： | 1 |
| 9 | CdS Quantum Dots-sensitized TiO_2 Nanotube Arrays for Solar Cells显示文摘CdS quantum dots(QDs) sensitized TiO2 nanotube arrays photoelectrodes were investigated for their photovoltaic performance of quantum dots-sensitized solar cells. The highly ordered TiO2 nanotube arrays(TNAs) were synthesized on Ti foils by anodic oxidation method. Then CdS quantum dots were deposited onto the TiO2 nanotube arrays by successive ionic layer absorption and reaction(SILAR) method to serve as the sensitizers. Cd(NO3)2 and Na2S were used as the precursor materials of Cd+ and S2- ions, respectively. It is found that the CdS QDs sensitizer may significantly increase the light response of TiO2 nanotube arrays. With increasing CdS QDs deposition cycles, the visible light response increases. Maximum photocurrent was obtained for the QDs that have an absorption peak at about 500 nm. Under AM 1.5 G illuminations(100 mW cm-2), a 4.85 mA/cm2 short circuit current density was achieved, and the maximium energy conversion efficiency of the as-prepared CdS QDs-sensitized TNAs solar cells was obtained as high as 0.81 % at five SILAR cycles. | 隋小涛 TAO Haizheng LOU Xianchun WANG Xuelai FENG Jiamin ZENG Tao 赵修建 | 2013 | Journal of Wuhan University of Technology(Materials Science)2013，28，1： | 1 |
| 10 | 显示文摘 | Liu Baoshun Wang Xuelai Cai Guofa | 2009 | Journal of Hazardous Materials2009，169，： | 1 |
| 11 | 霸道英语必须休矣!显示文摘英语过热这一问题,各论坛早有众多有识之士发帖表达其反对的观点,而近来,有越来越多的网们关注这个问题,足见其已经是非常严重,引起的广泛的关注,必须及时采取有效措施予以改正。英语之误误在哪里?如何对待英语才是正确的态度和方法?我们来分析。 | xuelai | 2005 | 中国大学生就业2005，，17： | 0 |
| 12 | Research on the structure design of double eccentric coaxial spherical robot显示文摘 | Xuelai Shang | 2013 | International Journal of Technology Management2013，，2： | 0 |
| 13 | Variations of shear-wave splitting parameters in the source region of the 2023 Türkiye doublet earthquakes显示文摘In this study,the shear-wave splitting parameters of local seismic events from the source regions of the 2023 Türkiye MW7.7 and MW7.6 doublet earthquakes(event 1 and event 2,respectively)were measured from June 1,2022,to April 25,2023,and their spatiotemporal characteristics were analyzed.The results revealed clear spatial and temporal differences.Spatially,the dominant fast-wave polarization direction at each station shows a strong correlation with the direction of the maximum horizontal principal compressive stress,as characterized by focal mechanism solutions of seismic events(MW≥3.5)near the station.The dominant fast-wave polarization direction and the regional stress field also showed a strong correlation with the intermovement of the Arabian Plate,African Plate,and Anatolian Block.Along the Nurdagi-Pazarcik fault zone,the seismic fault of event 1,stations closer to the middle of the fault where the mainshock occurred exhibited notably greater delay times than stations located towards the ends of the fault and far from the mainshock.In addition,the stations located to the east of the Nurdagi-Pazarcik fault and to the north of the Sürgüfault also exhibited large delay times.The spatial distribution of shear-wave splitting parameters obtained from each station indicates that the upper-crust anisotropy in the source area is mainly controlled by the regional stress field,which is closely related to the state of the block motion.During the seismogenic process of the MW7.7 earthquake,more stress accumulated in the middle of the Nurdagi-Pazarcik fault than at either end of the fault.Under the influence of the MW7.7 and MW7.6 events,the stress that accumulated during the seismogenic process of the earthquake doublet may have migrated towards some areas outside the aftershock intensive area after the earthquakes,and the crustal stress and its adjustment range near the outer stations increased significantly.With the exception of two stations with few effective events,all stations showed a consistent change in shear-wave splitting parameters over time.In particular,each station showed a decreasing trend in delay times after the doublet earthquakes,reflecting the obvious intensification of crustal stress adjustment in the seismogenic zone after the doublet earthquakes.With the occurrence of the earthquake doublet and a large number of aftershocks,the stress accumulated during the seismogenic process of the doublet earthquakes is gradually released,and then the adjustment range of crustal stress is also gradually reduced. | Xuelai Cao Lijun Chang | 2024 | Earthquake Science2024，37，2： | 0 |
| 14 | Direct cellular reprogramming and transdifferentiation of fibroblasts on wound healing-Fantasy or reality?显示文摘Induced pluripotent stem cell(iPSC)technology is one of the de novo approaches in regeneration medicine and has led to new research applications for wound healing in recent years.Fibroblasts have attracted wide attention as the first cell line used for differentiation into iPSCs.Researchers have found that fibroblasts can be induced into different types of cells in variable mediums or microenvironments.This indicates the potential“stem”characteristics of fibroblasts in terms of direct cellular reprogramming compared with the iPSC detour.In this review,we described the morphology and biological function of fibroblasts.The stem cell characteristics and activities of fibroblasts,including transdifferentiation into myofibroblasts,osteogenic cells,chondrogenic cells,neurons,and vascular tissue,are discussed.The biological values of fibroblasts are then briefly reviewed.Finally,we discussed the potential applications of fibroblasts in clinical practice. | Juan Du Xuelai Liu Carol Wing Yan Wong Kenneth Kak Yuen Wong Zhixin Yuan | 2023 | Chronic Diseases and Translational Medicine2023，9，3： | 0 |
| 15 | β2 Adrenergic receptor on T lymphocytes and its clinical implications显示文摘Sustained complex cross-talk between the immune system and the nervous system plays a vital role in retaining homeostasis in a healthy individual.One of the central regulatory mechanisms involved is the existence and functions of β2-adrenergic receptors(β2AR) on T lymphocytes.This article reviews research progress made recently,including the expression of adrenergic receptors on T lymphocytes,the structure and intracellular pathways of β2AR,the activation of β2AR by either endogenous or exogenous agonists,and the effect of β2AR stimulation on T cells which alters T cell proliferation,differentiation,cytokine production and T-helper-mediated antibody production.Furthermore,we discuss the roles of β2AR played in the pathogenesis and treatment of autoimmune diseases. | Xuelai Fan Yuedan Wang | 2009 | Progress in Natural Science:Materials International2009，19，1： | 0 |
| 16 | Finite time thermodynamics analysis and research of pulsating heat pipe cold storage device显示文摘Phase change energy storage technology can effectively solve the energy mismatch in space and time.There are many disadvantages of phase change materials(PCMs),such as high supercooling,phase separation and poor heat transfer performance.As a new type of heat exchange structure,pulsating heat pipe has the advantages of simple structure,high heat transfer coefficient and good economic behavior.The system efficiency can be greatly improved by using pulsating heat pipe combined with cold storage technology.A set of pulsating heat pipe type cold storage device is developed,the finite time thermodynamic analysis is carried out,and the correlation between heat pipe efficiency and power is established.The three-dimensional physical model of pulsating heat pipe is simulated and verified by experiments.The experimental results show that in the cold storage stage,with the increase of the filling rate,the greater the pressure is,the better the heat transfer effect is;in the cold release stage,with the decrease of the filling rate,the smaller the pressure is,the better the heat transfer effect is. | Xiaofeng Xu Xuelai Zhang | 2022 | Energy Storage and Saving2022，1，1： | 0 |
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