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1The distribution characteristics of heavy metals in Guiyang urban soils显示文摘Guiyang is located in southwestern China,which is a famous tourism city,and is awarded the title of'the Summer Capital of China'.A study on heavy metals in Guiyang urban soils was conducted.The results showed that the concentrations of Cd,Cu,Ni,Pb and Zn in Guiyang urban soils are significantly higher than their background values and Cu,Zn and Pb in Guiyang soils are accumulated seriously.The distribution characteristics of heavy metals in 3 districts are described as follows:the level of heavy metals in soils follows the order of Nanming District> Yunyan District>Xiaohe District.The spatial distribution of metals in urban soils of Guiyang shows that the level of metals in the central and eastern parts of Guiyang is relatively high,and its characteristics are attributed to the influence of commercial activities,heavy traffic and industrial emission.Compared with some other cities in China,Guiyang is characterized by relatively high accumulation level of Cd,Cu,and Zn in its soils.LI Xiaoyan CAO Yijin QI Le SHU Fu 2012Chinese Journal Of Geochemistry2012,31,2:14
2High-performance compensation scheme for frequency-dependent IQ imbalances in OFDM transmitter and receiver显示文摘An efficient compensation scheme combining a timedomain Gaussian elimination(GE) channel estimator and a frequency-domain GE equalizer is proposed for orthogonal frequency division multiplexing(OFDM) systems with frequencydependent in-phase and quadrature-phase(IQ) imbalances at both transmitter and receiver.Compared with the traditional least square and least mean square compensation schemes,the proposed compensation scheme achieves the same bit error rate as the ideal IQ branches by using only two training OFDM symbols instead of about 20 OFDM symbols.Yan Liang Feng Shu Yijin Zhang Junhui Zhao 2013Journal of Systems Engineering and Electronics2013,24,2:4
3Interfacial engineering of Ni/V2O3 for hydrogen evolution reaction显示文摘Electrocatalytic water splitting offers a sustainable route for hydrogen production,enabling the clean and renewable alternative energy system of hydrogen economy.The scarcity and high-cost of platinum-group-metal(PGM)materials urge the exploration of high-performance non-PGM electrocatalysts.Herein,a unique hierarchical structure of NiA/2O3 with extraordinary electrocatalytic performance(e.g.t overpotentials as low as 22 mV at 20 mA·cm^-2 and 94 mV at 100 mA·cm^-2)toward hydrogen evolution reaction in alkaline electrolyte(1 M KOH)is reported.The investigation on the hierarchical NiA/2O3 with a bimodal size-distribution also offers insight of interfacial engineering that only proper NiA/2O3 interface can effectively improve H20 adsorption,H20 dissociation as well as H adsorption,for an efficient hydrogen production.Yang Chen Yuan Rao Rongzhi Wang Yanan Yu Qiulin Li Shujuan Bao Maowen Xu Qin Yue Yanning Zhang Yijin Kang 2020Nano Research2020,13,9:3
4Slope reliability analysis based on Monte Carlo simulation and sparse grid method显示文摘In order to solve the problem of the reliability of slope engineering due to complex uncertainties, the Monte Carlo simulation method is adopted. Based on the characteristics of sparse grid, an interpolation algorithm, which can be applied to high dimensional problems, is introduced. A surrogate model of high dimensional implicit function is established, which makes Monte Carlo method more adaptable. Finally, a reliability analysis method is proposed to evaluate the reliability of the slope engineering, and is applied in the Sau Mau Ping slope project in Hong Kong. The reliability analysis method has great theoretical and practical significance for engineering quality evaluation and natural disaster assessment.WU Guoxue PENG Yijin LIU Xuesong HU Tao WU Hao 2019Global Geology2019,22,3:2
5Challenges and opportunities for managing pediatric central nervous system tumors in China显示文摘Central nervous system(CNS)tumors represent the most deadly cancer in pediatric age group.In China,thousands of children are diagnosed with CNS tumors every year.Despite the improving socioeconomic status and availability of medical expertise within the country,unique challenges remain for the delivery of pediatric neuro-oncology service.In this review,we discuss the existing hurdles for improving the outcome of children with CNS tumors in China.Need for precise disease burden estimation,lack of intra-and inter-hospital collaborative networks,high probability of treatment abandonment,along with financial toxicities from treatment represent the key challenges that Chinese healthcare providers encounter.The tremendous opportunities for advancing the status of pediatric neuro-oncology care in and beyond the country are explored.Anthony Pak-Yin Liu Daniel CMoreira Chenchen Sun Lisa Krull Yijin Gao Bo Yang Chenran Zhang Kejun He Xiaojun Yuan Godfrey Chi-Fung Chan Xiaofei Sun Xiaoli Ma Ibrahim AQaddoumi 2020Pediatric Investigation2020,4,3:2
6Evidence for oxygenation of Fe-Mg oxides at mid-mantle conditions and the rise of deep oxygen显示文摘As the reaction product of subducted water and the iron core,FeO2 with more oxygen than hematite(Fe_(2)O_(3))has been recently recognized as an important component in the D'layer just above the Earth’s core-mantle boundary.Here,we report a new oxygen-excess phase(Mg,Fe)_(2)O_(3)+δ(0<δ<1,denoted as‘OE-phase’).It forms at pressures greater than 40 gigapascal when(Mg,Fe)-bearing hydrous materials are heated over 1500 kelvin.The OE-phase is fully recoverable to ambient conditions for ex situ investigation using transmission electron microscopy,which indicates that the OE-phase contains ferric iron(Fe^(3+))as in Fe_(2)O_(3) but holds excess oxygen through interactions between oxygen atoms.The new OE-phase provides strong evidence that H_(2)O has extraordinary oxidation power at high pressure.Unlike the formation of pyrite-type FeO_(2)H_(x) which usually requires saturated water,the OE-phase can be formed with under-saturated water at mid-mantle conditions,and is expected to be more ubiquitous at depths greater than 1000 km in the Earth’s mantle.The emergence of oxygen-excess reservoirs out of primordial or subducted(Mg,Fe)-bearing hydrous materials may revise our view on the deep-mantle redox chemistry.Jin Liu Chenxu Wang Chaojia Lv Xiaowan Su Yijin Liu Ruilian Tang Jiuhua Chen Qingyang Hu Ho-Kwang Mao Wendy L.Mao 2021National Science Review2021,8,4:2
7Ribozymes and the mechanisms that underlie RNA catalysis显示文摘Ribozymes 是普遍的,并且在房间催化一些极其重要的反应。最机械学地掉进二个班之一,用任何一个金属离子或一般酸硷的催化作用。nucleolytic ribozymes 掉进后者班,主要用 nucleobases。这些的一个子集使用加腺嘌酸基础的 guanine 的联合催化劈开反应。新 ribozymes 仍然在常规间隔正在被发现,我们能在 ribozymes 的潜在的存在上推测在 phosphoryl 转移反应以外催化化学,也许使用小分子的辅酶。Timothy J. Wilson Yijin Liu David M. J. Lilley 2016Frontiers of Chemical Science and Engineering2016,10,2:2
8MIMOdetection of 16QAM signaling based on semidefiniterelaxation显示文摘Yang Yijin Zhao Chunming Zhou Peng 2007IEEE Trans on Signal Processing2007,14,11:1
9Laser electron accelerator in plasma with adiabatcally attenuating density显示文摘SHI Yijin 2007Laser and Particle Bearms2007,25,2:1
10Effect of duration of force application on blood vessels in young and adult rats显示文摘Yijin Ran Jaap C Maltha Ietse 2008Am J Orthod Dentofacial Orthop2008,133,:1
11Recent progress of sensory system research in China显示文摘From human to insects, the sensory system is the part of the nervous system responsible for processing sensory information. Commonly recognized sensory systems includeWANG YiJin LIU Li 2012Science China(Life Sciences)2012,55,11:1
12Real Estate, the External Finance Premium and Business Investment: A Quantitative Dynamic General Equilibrium Analysis显示文摘YiJin Charles K.Y.Leung ZhixiongZeng 2012Real Estate Economics2012,,1:1
13Dispersion of carbon nanotubes by carbazole-tailed amphiphilic imidazolium ionic liquids in aqueous solutions显示文摘Bin Dong Yijin Su Yonghui Liu Jie Yuan Jingkun Xu Liqiang Zheng 2011Journal of Colloid And Interface Science2011,,1:1
14Piezoelectric Ceramic Transformer显示文摘Li Longtu Yao Yijin Mu Zhenhan 1980Ferroelectrics1980,28,:1
15Osteoblast integration of dental implant materials after challenge by sub-gingival pathogens: a co-culture study in vitro显示文摘Sub-gingival anaerobic pathogens can colonize an implant surface to compromise osseointegration of dental implants once the soft tissue seal around the neck of an implant is broken. In vitro evaluations of implant materials are usually done in monoculture studies involving either tissue integration or bacterial colonization. Co-culture models, in which tissue cells and bacteria battle simultaneously for estate on an implant surface, have been demonstrated to provide a better in vitro mimic of the clinical situation. Here we aim to compare the surface coverage by U2 OS osteoblasts cells prior to and after challenge by two anaerobic sub-gingival pathogens in a co-culture model on differently modified titanium(Ti), titanium-zirconium(Ti Zr) alloys and zirconia surfaces. Monoculture studies with either U2 OS osteoblasts or bacteria were also carried out and indicated significant differences in biofilm formation between the implant materials, but interactions with U2 OS osteoblasts were favourable on all materials. Adhering U2 OS osteoblasts cells, however,were significantly more displaced from differently modified Ti surfaces by challenging sub-gingival pathogens than from Ti Zr alloys and zirconia variants. Combined with previous work employing a co-culture model consisting of human gingival fibroblasts and supra-gingival oral bacteria, results point to a different material selection to stimulate the formation of a soft tissue seal as compared to preservation of osseointegration under the unsterile conditions of the oral cavity.Bingran Zhao Henny C van der Mei Minie Rustema-Abbing Henk J Busscher Yijin Ren 2015International Journal of Oral Science2015,7,4:1
16Understanding Effects of Wet Compression on Separated Flow Behavior in an Axial Compressor Stage Using CFD Analysis 显示文摘SUN Lanxin LI Yijin ZHENG Qun 2011Journal of Turbomachinery2011,133,3:1
17Effect of clay type on morphology and thermal stability of PMMA - clay nanocomposites prepared by heterocoagulation method 显示文摘Xu Yijin William J Brittain Xue Chenchen 2004Polymer2004,,45:1
18Establishment of special city GIS based on ArcObjects显示文摘Zhou Ping Yang Yijin Chen Qiang 2003International Geoscience and Remote Seining Symposium2003,6,:1
19High-entropy alloy nanoparticles as a promising electrocatalyst to enhance activity and durability for oxygen reduction显示文摘Developing efficient platinum-based electrocatalysts with super durability for the oxygen reduction reaction(ORR)is highly desirable to promote the large-scale commercialization of fuel cells.Although progress has been made in this aspect,the electrochemical kinetics and stability of platinum-based catalysts are still far from the requirements of the practical applications.Herein,PtPdFeCoNi high-entropy alloy(HEA)nanoparticles were demonstrated via a high-temperature injection method.PtPdFeCoNi HEA nanocatalyst exhibits outstanding catalytic activity and stability towards ORR due to the high entropy,lattice distortion,and sluggish diffusion effects of HEA,and the HEA nanoparticles delivered a mass activity of 1.23 A/mgPt and a specific activity of 1.80 mA/cmPt 2,which enhanced by 6.2 and 4.9 times,respectively,compared with the values of the commercial Pt/C catalyst.More importantly,the high durability of PtPdFeCoNi HEA/C was evidenced by only 6 mV negativeshifted half-wave potential after 50,000 cycles of accelerated durability test(ADT).Yanan Yu Fanjie Xia Chengjie Wang Jinsong Wu Xianbiao Fu Dongsheng Ma Bencai Lin Jiaao Wang Qin Yue Yijin Kang 2022Nano Research2022,15,9:1
20Piezoelectric ceramic transformer 显示文摘Li Longtu Yao Yijin Mu Zhenhan 1980Ferroelectrics1980,,:1
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