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| 1 | Finite element analysis and optimization of temperature field in GaN-MOCVD reactor显示文摘The electromagnetic field distribution of the in-home GaN-MOCVD reactor heated by induction was simulated by using finite element method (FEM), and the distributions of the magnetic field and the joule heat in the graphite susceptor were obtained. Then the distribution of joule heat was used as the applied load for the simulation of temperature. Based on heat conduction and heat emission models, the temperature distribution in the reactor and the susceptor were gained. In order to improve the uniformity of the temperature on the top surface of the susceptor, the conventional concentric placement of the susceptor in the reactor was changed into the eccentric placement, which effectively improved the temperature uniformity and increased the heat efficiency. | ZHANG JinCheng, LI ZhiMing, HAO Yue , WANG Hao & LI PeiXian Key Laboratory of Fundamental Science for National Defense on Wide Band-Gap Semiconductor Technology, School of Microelectronics, Xidian University, Xi’an 710071, China | 2010 | Science China(Information Sciences)2010，53，10： | 7 |
| 2 | Enrichment characteristics and exploration directions of deep shale gas of Ordovician-Silurian in the Sichuan Basin and its surrounding areas,China显示文摘The enrichment characteristics of deep shale gas in the Ordovician Wufeng-Silurian Longmaxi formations in the Sichuan Basin and its surrounding areas are investigated through experiments under high temperature and high pressure,including petrophysical properties analyses,triaxial stress test and isothermal adsorption of methane experiment.(1)The deep shale reservoirs drop significantly in porosity and permeability compared with shallower shale reservoirs,and contain mainly free gas.(2)With higher deviatoric stress and axial strain,the deep shale reservoirs have higher difficulty fracturing.(3)Affected by structural location and morphology,fracture characteristics,geofluid activity stages and intensity,deep shale gas reservoirs have more complicated preservation conditions.(4)To achieve the commercial development of deep shale gas reservoirs,deepening geological understanding is the basis,and exploring reservoir simulation technology befitting the geological features is the key.(5)The siliceous shale and limestone-bearing siliceous shale in the Metabolograptus persculptus-Parakidograptus acuminatus zones(LM1-LM3 graptolite zones)are the high-production intervals for deep shale gas and the most favorable landing targets for horizontal drilling.Deeps water areas such as Jiaoshiba,Wulong,Luzhou and Changning with deep shale reservoirs over 10 m thickness are the most favorable areas for deep shale gas enrichment.It is recommended to carry out exploration and development practice in deep-water shale gas areas deposited deep with burial depth no more than 5000 m where the geological structure is simple and the shale thickness in the LM1-LM3 graptolite zone is greater than 10 m.It is better to increase the lateral length of horizontal wells,and apply techniques including high intensity of perforations,large volume of proppant,far-field and near-wellbore diversions to maximize the stimulated deep reservoir volume. | NIE Haikuan LI Pei DANG Wei DING Jianghui SUN Chuanxiang LIU Mi WANG Jin DU Wei ZHANG Peixian LI Donghui SU Haikun | 2022 | Petroleum Exploration and Development2022，49，4： | 3 |
| 3 | Enhanced catalysis of ultrasmall Au-MoS_2 clusters against reactive oxygen species for radiation protection显示文摘Ionizing radiation produces excessive reactive oxygen species(ROS) which impose detrimental effects on biological systems. Thus, it is important to explore clinically safe and efficacious radioprotection agents to scavenge ROS and reduce the risks of radiotherapy. Recently, emerging catalytic nanomaterials such as sulfide nanomaterials have shown capability of clearing ROS in vivo by unique electron transfers between atoms, but their catalytic activities are yet suboptimal. As such, there is an unmet need to improve catalytic properties for stronger antioxidant activities and radiation protection. Herein, we prepared ultrasmall Au-MoS_2 clusters(~2.5 nm) and they showed enhanced catalytic properties via gold intercalation facilitating increased active sites and synergistic effects. Electrocatalysis results revealed that the catalytic activity of Au-MoS_2 towards H2O_2 was superior to ultrasmall MoS_2 without Au. As a result, we found that improving the electrocatalytic property of Au-MoS_2 can effectively enhance corresponding antioxidant activities and radioprotection effects in vivo. In addition, Au-MoS_2 also showed significant radioprotection in vitro and dramatically reduced the excess of radiation-induced adverse ROS. It also rescued radiation-induced DNA damages and protected the bone marrow hematopoietic system from ionizing radiation. | Peixian Bian Jinxuan Zhang Junying Wang Jiang Yang Jingya Wang Haile Liu Yuanming Sun Meixian Li Xiao-Dong Zhang | 2018 | Science Bulletin2018，63，14： | 2 |
| 4 | High efficiency and enhanced ESD properties of UV LEDs by inserting p-GaN/p-AlGaN superlattice显示文摘Significantly improved electrostatic discharge(ESD)properties of InGaN/GaN-based UV light-emitting diode(LED)with inserting p-GaN/p-AlGaN superlattice(p-SLs)layers(instead of p-AlGaN single layer)between multiple quantum wells and Mg-doped GaN layer are reported.The pass yield of the LEDs increased from 73.53%to 93.81%under negative 2000 V ESD pulses.In addition,the light output power(LOP)and efficiency droop at high injection current were also improved.The mechanism of the enhanced ESD properties was then investigated.After excluding the effect of capacitance modulation,high-resolution X-ray diffraction(XRD)and atomic force microscope(AFM)measurements demonstrated that the dominant mechanism of the enhanced ESD properties is the material quality improved by p-SLs,which indicated less leakage paths,rather than the current spreading improved by p-SLs. | HUANG Yong LI PeiXian YANG Zhuo HAO Yue WANG XiaoBo | 2014 | Science China(Physics,Mechanics & Astronomy)2014，57，5： | 2 |
| 5 | Preventive Cardioprotection of Erythropoietin Against Doxorubicin-induced Cardiomyopathy显示文摘 | Xing Chen Yongli Chen Yanyong Bi Naikuan Fu Chunyan Shan Sili Wang Shahid Aslam Peixian Wang Jing Xu | 2007 | Cardiovascular Drugs and Therapy2007，，5： | 1 |
| 6 | Comprehensive Assessment on Tourism Eco-environment of Gansu Province Based on Spatial Data显示文摘The article studies tourism eco-environment of 14 cities of Gangsu Province, China, based on GIS with many kinds of multi-subject spatial database, such as remote sensing data, observation data and literature data. The research results were as follows. First, spatial features of 14 cities' tourism eco-environment are displayed with five levels of vulnerability respectively. The vulnerability in Gansu becomes worse from Gannan City, located in southern Gansu to Hexi Corridor which lies in northwestern Gansu. Second, the areas of above the middle vulnerability level make up 75% of the total areas of Gansu Province. Third, more than 70% of high-level human and natural tourism resources are in the areas with high vulnerability eco-environment. Fourth, it is crucial to develop comprehensive tourism industry in order to improve the harmonious development between tourism industry and eco-environment in Gansu Province. | Wang Lili Dong Suocheng Li Yu Wang Peixian Qi Xiaoming | 2009 | Chinese Journal of Population,Resources and Environment2009，7，2： | 1 |
| 7 | Erythropoietin Modulates Imbalance of Matrix Metalloproteinase-2 and Tissue Inhibitor of Metalloproteinase-2 in Doxorubicin-induced Cardiotoxicity显示文摘 | Xing Chen Zhihua Guo Peixian Wang Miqing Xu | 2014 | Heart, Lung and Circulation2014，，： | 1 |
| 8 | Corrosion behacior of thermal sprayed WC cermet coatings containing metallic binders in saline environment 显示文摘 | Wang Lijun Qiu Peixian Zhou Wuxi | 2013 | Transactions of Nonferrous Metals Society of China2013，23，： | 1 |
| 9 | A high efficient photocatalyst Ag3VO4/TiO2/grapheme nanocomposite with wide spectral response显示文摘 | Wang Jinxiu Wang Peixian Cao Yuantao | 2013 | Applied Catalysis B:Environmental2013，136，： | 1 |
| 10 | Diffraction from the Second-Order Photorefractive Grating in Paraelectric KTa_(1-x)Nb_(x)O_(3) Crystals显示文摘Diffraction from the second-order photorefractive grating written in KTa_(1-x)Nb_(x)O_(3)(x=0.32)crystal with cubic phase has been observed for the first time.The behaviors of this diffraction have been investigated experimentally.Some qualitative explanations have been proposed. | LIAN Yingwu YANG Changxi YE Peixian GUAN Qingcai WANG Jiyang | 1993 | Chinese Physics Letters1993，10，4： | 0 |
| 11 | Effects of Different Water and Fertilizer Combinations on Tree Structure,Leaf Parameters and Photosynthesis of Apple Saplings显示文摘[Objective] This study aimed to investigate the effects of different water and fertilizer combinations on apple saplings. [Method]‘Tianhong 2'Fuji/ SH40 / Malus robusta Rehd. was used as the experimental material to analyze the effects of different irrigation modes and combinations of basal fertilizer and dressing fertilizer on tree structure,leaf parameters and photosynthesis of apple saplings. [Result]The results showed that different water and fertilizer combinations exhibited varying effects on tree structure,leaf parameters and photosynthesis of apple saplings. To be specific,applying 432 000 kg / hm2 basal fertilizer,480 kg / hm2 urea and 915 kg / hm2 organic fertilizer + 0 + 915 kg / hm2 organic fertilizer as dressing fertilizer,and 1% urea as leaf fertilizer was conducive to promoting growth of branches and leaves,increasing leaf thickness,individual leaf area and SPAD,and improving photosynthesis of apple saplings under half root irrigation and whole root irrigation conditions. In addition,the effects were more significant under whole root irrigation conditions. [Conclusion]Selecting the appropriate water and fertilizer combination is conducive to the growth of apple saplings. | Ru CHEN Jinzheng WANG Xiaomin XUE Peixian NIE Guiping WANG | 2014 | Agricultural Biotechnology2014，3，6： | 0 |
| 12 | Broadband Fluorescence Guided-Wave in DANS/PMMA Thin Film Waveguides显示文摘The broadband fluorescence guided-waves excited in DANS/PMMA polymer thin film waveguides by an Ar+laser beam were demonstrated in terms of the observation of mlines with colour array.Considering the high brightness of these m-lines observation,we assert that it is a kind of stimulated amplification of fluorescence guided-wave. | WANG Huitian DONG Fengzhong ZHANG Zhanxiang YE Peixian QIU Ling SHEN Jifeng FU Xingfa SHEN Yuquan | 1994 | Chinese Physics Letters1994，11，2： | 0 |
| 13 | Photo refractive Proper ties of Paraelec trie Copper Doped Pot assium Tant ala te Niobate显示文摘The photorefractive properties of Cu doped KTa_(1-x)Nb_(x)O_(3) have been st tidied by using two-wave mixing method.The diffraction efficiency reaches as high as 52%under an electric Held.The dependences of diffraction efficiency on interference angles and applied fields Aave been studied.The maximum light induced index chajige is found to be 2.33×10^(-5) and the photorefraction sensitivity calculated is 5×10^(-6)cm^(2)/J.Experimental results demonstrate that electrons are the dominant charge carriers. | GUAN Qingcai WANG Jiyang WANG Min LIU Yaogang WEI Jingqian ZHANG Zhiguo YANG Changxi YE Peixian | 1991 | Chinese Physics Letters1991，8，10： | 0 |
| 14 | Effects of Different Density-reducing Methods on Canopy Microenvironment, Tree Growth and Fruit Quality in Closed Apple Orchard显示文摘In order to optimize and transform closed mature apple orchards with standard rootstocks and improve the quality of fruit,taking a closed Red Fuji apple orchard as the test object,the effects of different density-reducing methods(deinterlacing,removing every other plant in each row,removing every other plant every other row)on the canopy microenvironment,tree structure,leaf photosynthesis and fruit quality were studied.The results showed that different density-reducing methods significantly reduced the orchard coverage and increased the crown transmittance.Among them,the deinterlacing treatment was the best in improving the population structure of the closed orchard,as it reduced the orchard coverage rate by 55.68 percentage points and the canopy transmittance by 82.38 percentage points,compared with the control(CK).Different density-reducing methods all could significantly reduce the branch amount in the closed orchard and optimized the branch composition.The three density-reducing methods decreased the number of branches per plant by 18.96%,12.41%and 19.58%,respectively,compared with the CK.And compared with the CK,the proportion of short branches and leafy branches to the total branches was increased by 17.13%,14.27%and 7.37%,respectively,and the proportion of long branches and developmental branches to the total branches was decreased by 24.47%,18.04%and 10.79%,respectively.The effects of the different density-reducing methods on the temperature,relative light intensity,SPAD and leaf photosynthetic rate in canopies all followed an order of deinterlacing>removing every other plant in each row>removing every other plant every other row>CK,while those on the relative humidity showed an order of deinterlacing>removing every other plant in each row>removing every other plant every other row>CK,while those on the relative humidity showed an order of deinterlacing | Ru CHEN Xiaomin XUE Laiping WANG Hao ZHAI Peixian NIE Jinzheng WANG | 2019 | Agricultural Biotechnology2019，8，6： | 0 |
| 15 | An integrative analysis of metabolomics,DNA methylation and RNASeq data reveals key genes involved in albino tea'Haishun 2'显示文摘Albino tea,a type of tea closely associated with the chlorophyll-deficient phenotype is of great interest due to its multiple benefits to human health.To explore the potential mechanisms involved in albino tea,we performed metabolomics,DNA methylation and RNA-Seq analysis of green and albino leaves in a special tea mutant'Haishun 2'.The albino leaves accumulated significantly less catechins compared with the green leaves,which is closely associated with their difference in chlorophyll formation.A total of 385 candidate genes were identified by the integrative analysis.Two NAC transcription factors were less methylated and highly up regulated in the albino leaves of'Haishun 2',which was the first identification of the key roles of NAC transcription factors in albino tea and worth further study.Many genes involved in catechin biosynthesis were down regulated in albino leaves,such as 4-coumarate-CoA ligase,flavonol synthase and leucoanthocyanidin reductase genes,suggesting chlorophyll formation is important for catechin biosynthesis.Furthermore,CsMYB5 and CsGSTF11 were found to be differentially methylated and expressed in albino and green leaves,indicating their potential roles in catechin accumulation.This was the first report of the integrative analysis of transcriptome and DNA methylation data in tea plants and the results suggest that the integrative analysis is useful for exploring key genes associated with epigenetic changes in tea plants. | Kang Wei Shuping Yu Qili Quan Shirin Aktar Mengdi He Yazhen Zhang Huihan Fang Rongmei Wu Li Ruan Peng Mao Peixian Bai Liyun Wu Hao Cheng Liyuan Wang | 2022 | Beverage Plant Research2022，2，1： | 0 |
| 16 | NEW ORGANIC SYSTEM FOR PHOTON-GATED PERSISTENT SPECTRAL HOLE BURNING显示文摘We report a new system of organic materials for photon-gated persistent spectral hole burning by donor-acceptor electron transfer:a tetrabenzoporphyrin derivative as donor and one of several aromatic cyanides as an acceptor in a poly(methyl methacrylate)(FMMA)host matrix.Up to 50C%deep spectral holes in transmission were burnt and appeared very high hole burning efficiency. | WANG Duoyuan HU Lingzhi HE Huizhu XIE Jie ZHANG Junyi ZHAO Lizeng ZHANG Xiulan ZHANG Dongxiang MI Xin NIE Yuxin YE Peixian | 1990 | Chinese Physics Letters1990，7，12： | 0 |
| 17 | Assessment of the immigration effect and choice of development pattern for scenic areas:a case study of Wuyi Mountain, China显示文摘Mountainous regions face a series of conflicts between the natural resources conservation and the economic development, especially in protected areas, where are the home to some of the poorest people in the world. In China, the Protected Areas Authorities (such as Protected Areas Authorities of Wuyi Mountain) transferred the mountainous people out of the protected areas. We found that it is not a good approach of immigration project, as far as economic and ecological effect is concerned. Although remote and majestic beauty attracted many tourists, mass tourism is not a good approach to solve the development problem in mountainous areas because it can not provide enough opportunities to make local people live a comfortable life, and the high volume of tourists indicates that the resources face significant threats. Because many landscapes are run by private enterprises, local residents and gov-ernment only get limited benefits. Although ecotourism principles expatiate on economic development and resources conservation, local people income and tourists feelings, it has discordance between the theory and the practice. Therefore, the term of 'integrated ecotourism' was coined in the paper based on the ecotourism theory. Integrated ecotourism means a broadly tourism resources and pendulum spatial pattern which will come into being with the movement of local people and tourists from protected areas to the nearby town or city; and it also tries to solve the property right conflict of mountain land between the local people and the private enterprises according to property right theory. | Wang Peixian Dong Suocheng Zhang Yuanyuan Xu Lin Yan Shenghu | 2008 | Ecological Economy2008，4，1： | 0 |
| 18 | Observation of Optical Bistabilities in a Doped Polymer Thin Film Quasi-waveguide显示文摘Optical bistability was observed and studied in the output of reflected beam as well as in that of m-lines in a doped polymer thin film quasi-waveguide.The physical origin was demonstrated to be the existence of a mode spectrum and the high third order nonlinearity of the polymer film.It was also observed for the first time that the intensity variation of the reflected beam and the m-line in the hysteresis loops are complementary to each other. | WANG Huitian DONG Fengzhong ZHANG Zhanxiang YE Peixian QIU Ling SHEN Jifeng FU Xingfa SHEN Yuquan | 1995 | Chinese Physics Letters1995，12，4： | 0 |
| 19 | β-Cyclodextrin-modified AuBi metallic aerogels enable efficient peroxidase mimicking for colorimetric sensing of urease-positive pathogenic bacteria显示文摘The detection of pathogenic bacteria with improved accessibility,reduced analysis time,and increased sensitivity is of great importance for diagnosing the infected disease.Nanozymes have attracted rising attention in the bioassay field.Designing a model nanozyme needs the combined merit of sensible nanostructures and a large specific surface area to guarantee exceptional enzyme-mimic activity.Herein,aβ-cyclodextrin modified AuBi aerogel is prepared by a one-pot reduction strategy.The introduction ofβ-cyclodextrin(featured with a hydrophobic cavity and hydrophilic surface)enhances the catalytic activity of AuBi aerogels by engendering host-guest complex and improving dispersity/stability.Based on the specific urea hydrolysis,which could produce NH_(3)to raise pH by urease,the pH up-regulation would inhibit the peroxidase-mimicking performances ofβ-cyclodextrin/AuBi aerogels.Therefore,the sensitive colorimetric detection platform for urease activity could be constructed.Moreover,the sensing platform can detect straightforwardly urease-positive Proteus mirabilis in urine circumstances with a wide detection range and a low limit of detection(LOD)of 4 colony-forming unit(CFU)·mL^(-1).The reproducibility,stability,and specificity of this approach are verified to be satisfactory.Also,as an inhibitor of urease activity,the fluoride ion could be detected by the constructed sensing platform sensitively and specifically.Overall,this work provides a blueprint for designing an ideal nanozyme and paves a new roadway for detecting pathogenic bacteria. | Minghui Wang Peixian Wu Sha Yang Gui-long Wu Na Li Xiaofeng Tan Qinglai Yang | 2023 | Nano Research2023，16，7： | 0 |
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