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| 1 | Analysis of air quality characteristics of Beijing–Tianjin–Hebei and its surrounding air pollution transport channel cities in China显示文摘Beijing–Tianjin–Hebei(BTH)and its surrounding areas are very important to air pollution control in China.To analyze the characteristics of BTH and its surrounding areas of China,we collected 5,641,440 air quality data from 161 air monitoring stations and 37,123,000 continuous monitoring data from air polluting enterprises in BTH and surrounding cities to establish an indicator system for urban air quality portraits.The results showed that particulate matter with aerodynamic diameters of<2.5μm(PM2.5),particulate matter with aerodynamic diameters of<10μm(PM10)and SO2 improved significantly in 31 cities from2015 to 2018,but ozone deteriorated.Air quality in BTH and the surrounding areas showed obvious seasonal characteristics,among which PM2.5,PM10,SO2,and NO2 showed a'U'type distribution from January to December,while O3 had an'inverted U'distribution.The hourly changes in air quality revealed that peaks of PM2.5,PM10 and NO2 appeared from 8:00 to 10:00,while those for O3 appeared at 15:00–16:00.The exposure characteristics of the 31 cities showed that six districts in Beijing had the highest air quality population exposure,and that exposure levels in Zhengzhou,Puyang,Anyang,Jincheng were higher than the average of the 31 investigated cities.Additionally,multiple linear regression revealed a negative correlation between meteorological factors(especially wind and precipitation)and air quality,while a positive correlation existed between industrial pollution emissions and air quality in most of BTH and its surrounding cities. | Cuicui Xiao Miao Chang Peikun Guo Meifeng Gu Yang Li | 2020 | Journal of Environmental Sciences2020，32，1： | 15 |
| 2 | Effect of electrolysis voltage on electrochemical reduction of titanium oxide to titanium in molten calcium chloride显示文摘The electrochemical reduction of solid TiO2 directly to solid metal is a promising alternative to the current Kroll process. The present work is aimed at studying the effect of electrolysis voltage on the rate of electrochemical reduction. The products of electrochemical reduction of TiO2 and Ti2O were examined using the scanning electron microscopy (SEM) and X-ray diffraction (XRD) techniques. The results show that Ti2O was reduced to low valent titanium oxide at 1.5-1.7 V, which was the result of ionization of oxygen. TiO2 and Ti2O were reduced to titanium metal at 2.1-3.1 V, which was the co-action of ionization of oxygen and calciothermic reduction. The oxygen content decreased rapidly with voltage increas-ing from 2.1 to 2.6 V, while it changed little from 2.6 to 3.1 V. The optimized cell voltage was 2.6-3.1 V. | LIU Meifeng LU Shigang KAN Surong LI Guoxun | 2007 | Rare Metals2007，26，6： | 7 |
| 3 | Key Engineering Technologies to Achieve Green, Intelligent, and Sustainable Development of Deep Metal Mines in China显示文摘1.Introduction Metal mineral resources are the most important industrial raw materials in the world and play an indispensable role in the development of the national economy,social and material civilization,and scientific and technological progress.After decades of sustained and high-intensity development,shallow metal mineral resources in China have gradually decreased and are nearly exhausted[1];thus,the exploitation of metal mineral resources is comprehensively advancing toward greater depths.At present,more than 20 underground metal mines have reached or exceeded a mining depth of 1000 m[2].According to statistics,the mining depth of more than one-third of China’s underground metal mines will exceed 1000 m over the next decade,and the maximum mining depth will range from 2000 to 3000 m.It has been predicted that,with the advancement of exploration technology and the increase in exploration depth,it is entirely possible to encounter several large metal deposits at depths ranging from 3000 to 5000 m in China.Consequently,deep mining is the most urgent problem facing the development of metal mines in China,while remaining the most important way to ensure the sustainable development and supply of metal mineral resources in the future.Against this background,we propose key engineering technologies to address the problems presented by deep mining from a strategic perspective. | Meifeng Cai Peng Li Wenhui Tan Fenhua Ren | 2021 | Engineering2021，7，11： | 6 |
| 4 | GIS-based 3D limit equilibrium analysis for design optimization of a 600 m high slope in an open pit mine显示文摘Combining the GIS (geographic information systems) grid-based data with four proposed column-based 3D slope stability analysis models, a comprehensive solution of a high-steep open-pit slope has been obtained. For six searching ranges, 19 critical slip surfaces of different sizes have been studied, in which the minimum 3D safety factor is 1.33. Comparison of 3D safety factors of des- igned and proposed slope plans shows for all the critical slip surfaces for the proposed plan, the smallest 3D safety factor is 1.33 under the most unfavorable condition. This means that the proposed plan of the high slopes, about 600 m, of an open pit (2-5o steeper than designed plan) is feasible. | Meifeng Cai Mowen Xie Chunlei Li | 2007 | Journal of University of Science and Technology Beijing2007，14，1： | 4 |
| 5 | Seepage effects of groundwater and its make-up water on triggering ground subsidence显示文摘The functioning mechanism of groundwater and its make-up water in the process of ground subsidence was studied from such three aspects as osmotic corrasion, osmotic pressure effect and concretion effect. As to osmotic corrasion, its forming conditions, mechanical mechanism and process were analyzed. As to osmotic pressure effect, it was mainly studied from hydrostatic pressurizing effect, sop softening effect and negative pressure sealing effect. Through concretion and saturation of soil, the factors of concretion settlement were analyzed. The results showed that both groundwater and its make-up water are important triggering factors to ground subsidence. | Zhenhua Ouyang Meifeng Cai Changhong Li Mowen Xie | 2006 | Journal of University of Science and Technology Beijing2006，13，1： | 3 |
| 6 | Geology, Geochronology, and Hf Isotopic Composition of the Pha Lek Fe Deposit, Northern Laos: Implications for Early Permian Subduction-Related Skarn Fe Mineralization in the Truong Son Belt显示文摘The Truong Son metallogenic belt in central Laos and Vietnam is an important Fe-Cu-Sn-Au polymetallic ore district. The Pha Lek Fe deposit is closely related to Late Carboniferous– Early Permian I-type granitic magmatism, and contains >50 Mt @ 45% to 50% of Fe ore. Ore minerals occur mainly as magnetite and hematite in the skarn alteration zone between a granitic pluton and metamorphosed Middle–Upper Devonian carbonates. The granitic pluton comprises granodiorite and granite, with zircon U-Pb dating indicating synchronous emplacement at 288.2±1.3 and 284.9±1.2 Ma, respectively. Zircons from these granitoids have ε_(Hf)(t) values of 2.9–11.2 and relatively young TDM2 ages(<1.0 Ga), indicating an origin by partial melting of depleted mafic crust or magma mixing. Previous studies have shown that these granitoids have high Y, Yb, and K_2O contents, and low Sr and Na_2O contents, which are interpreted as the melting of mafic continental crust. Pyrite of the main mineralization stage yields an ^(187)Re/^(188)Os-^(187)Os/^(188)Os isochron age of 287±17 Ma, indicating that mineralization is associated with Pha Lek granitic magmatism. A Late Carboniferous–Early Permian subduction-related skarn-type Fe mineralization model is proposed for the Pha Lek deposit. More evidence is needed to verify a hypothesis of volcanic overprinting during Late Triassic post-collisional extension. | Lin Hou Shusheng Liu Linnan Guo Fuhao Xiong Chao Li Meifeng Shi Qiming Zhang Siwei Xu Songyang Wu | 2019 | Journal of Earth Science2019，30，1： | 2 |
| 7 | Treadmill Exercise Relieves Chronic Restraint Stress-induced Cognitive Impairments in Mice Via Activating Protein Phosphatase 2A显示文摘Dear Editor,Aerobic exercise is well known to improve cognitive functions including hippocampus-dependent spatial memory[1]and object recognition[2].Regarding the molecular mechanisms,the indispensable role of brain-derived neurotrophic factor(BDNF)in governing exercise-induced neural plasticity has been demonstrated for the improvement of learning and memory[3].Our recent study further demonstrated the activation of mechanistic target of rapamycin pathways downstream of BDNF to drive synaptic protein synthesis upon persistent exercise[4],but leaving the effect of exercise on the post-translational modification of proteins largely unknown. | Wenjing Zhang Haining Ou Borui Zhang Meifeng Zheng Lan Yan Yang Chen Kwok-Fai So Li Zhang | 2021 | Neuroscience Bulletin2021，37，10： | 2 |
| 8 | Capsid destabilization and epitope alterations of human papillomavirus 18 in the presence of thimerosal显示文摘Thimerosal has been widely used as a preservative in drug and vaccine products for decades.Due to the strong propensity to modify thiols in proteins,conformational changes could occur due to covalent bond formation between ethylmercury(a degradant of thimerosal)and thiols.Such a conformational change could lead to partial or even complete loss of desirable protein function.This study aims to investigate the effects of thimerosal on the capsid stability and antigenicity of recombinant human papillomavirus(HPV)18 virus-like particles(VLPs).Dramatic destabilization of the recombinant viral capsid upon thimerosal treatment was observed.Such a negative effect on the thermal stability of VLPs preserved with thimerosal was shown to be dependent on the thimerosal concentration.Two highly neutralizing antibodies,13H12 and 3C3,were found to be the most sensitive to thimerosal treatment.The kinetics of antigenicity loss,when monitored with 13H12 or 3C3 as probes,yielded two distinctly different sets of kinetic parameters,while the data from both monoclonal antibodies(mAbs)followed a biphasic exponential decay model.The potential effect of thimerosal on protein function,particularly for thiolcontaining proteinaceous active components,needs to be comprehensively characterized during formulation development when a preservative is necessary. | Xiaofen Huang Yike Li Meifeng Nie Mingxi Yue Yufang Li Zhijie Lin Huirong Pan Mujin Fang Ting Wu Shaowei Li Jun Zhang Ningshao Xia Qinjian Zhao | 2021 | Journal of Pharmaceutical Analysis2021，11，5： | 1 |
| 9 | Independent oncogenic and therapeutic significance of phosphatase PRL‐3 in FLT3‐ITD–negative acute myeloid leukemia显示文摘 | Shuang Qu Bin Liu Xiaoling Guo Hongshun Shi Meifeng Zhou Li Li Shulan Yang Xiuzhen Tong Haihe Wang | 2014 | Cancer2014，，14： | 1 |
| 10 | High-throughput synthesis of oxidation-resistant Nb-Si based alloy thin film by magnetron co-sputtering显示文摘A high-throughput method was applied to study oxidation behavior of Nb-Si based alloy using composition spread alloy film as combinatorial libraries.An extended range of composition gradients of Nb-Si based alloy film was deposited by(multi)magnetron co-sputtering.The as-deposited film was composed of amorphous phase.Cr_(2)Nb,Nb_(5)Si_(3)and Nbss could be detected after annealing treatment.After oxidation at 1250℃for 10 min and 20 min,the film composition space was divided into three regions of the distinct oxide scales.The compositions for establishment of the different oxides on Nb-Si based alloy was defined efficiently across the entire composition space by the combinatorial libraries. | Chen Sun Wei Jiang Meifeng Li Jiangbo Sha Chungen Zhou | 2021 | Progress in Natural Science:Materials International2021，31，3： | 1 |
| 11 | Alzheimer's Disease and Methanol Toxicity (Part 2): Lessons from Four Rhesus Macaques (Macaca mulatta) Chronically Fed Methanol显示文摘 | Meifeng Yang Junye Miao Joshua Rizak Rongwei Zhai Zhengbo Wang Tanzeel Huma Ting Li Na Zheng Shihao Wu Yingwei Zheng Xiaona Fan Jianzhen Yang Jianhong Wang Shangchuan Yang Yuanye Ma Longbao Lü Rongqiao He Xintian Hu | 2014 | Journal of Alzheimer's Disease2014，，4： | 1 |
| 12 | Defining hirsutism in Chinese women: a cross-sectional study显示文摘 | Xiaomiao Zhao Renmin Ni Lin Li Yaqin Mo Jia Huang Meifeng Huang Ricardo Azziz Dongzi Yang | 2011 | Fertility and Sterility2011，，3： | 1 |
| 13 | Feasibility Study on Continuous Mining Method in Deep Position of Jinchuan Nickel Mine, China显示文摘Jinchuan nickel mine is the largest nickel mine in China. Cut-and-fill mining method with high density cementing materials is used in the mine. The original mining design divided the mining operation into two steps. The first step stopped the mining rooms and the second step stopped the pillars. Because the two-step method made big trouble for finally mining pillars and strongly limited the mining speed and production, it was successfully changed to a continuous cut-and-fill method without pillars. Howerver, the mining operation in the mine has been down to 800 m and the mining condition is getting worse and more complicated. Through systematical field investigations and 3-D FEM analysis, it is proved that the mining method without pillars is feasible for mining deeper orebodies in Jinchuan nickel mine. | Meifeng Cai, Lan Qiao, Changhong Li, Shuanghong Wang (Civil and Environmental Engineering School, University of Science and Technology Beijing, Beijing 100083, China) | 2001 | Journal of University of Science and Technology Beijing2001，8，2： | 1 |
| 14 | Results of in situ stress measurement and their application to mining design at five metal mines显示文摘 | Cai Meifeng Qiao Lan Li Changhong | 2000 | International Journal of Rock Mechanics and Mining Sciences2000，37，3： | 1 |
| 15 | HIF-1α induced-VEGF overexpression in bone marrow stem cells protects cardiomyocytes against ischemia显示文摘 | Ying Dai Meifeng Xu Yigang Wang Zeeshan Pasha Tingyu Li Muhammad Ashraf | 2007 | Journal of Molecular and Cellular Cardiology2007，，6： | 1 |
| 16 | Mechanism of dynamic destabilization of mined-out area during mining in Da liuta Coal Mine显示文摘 | CAI Meifeng LI Yumin LAI Xingping | 2009 | Journal of Liaoning Technical University(Natural Science)2009，28，1： | 1 |
| 17 | Control of large linear magnetoelectricity in Co_(3)NiNb_(2)O_(9)显示文摘Magnetoelectric(ME)materials have caught worldwide attentions owing to their potential technological applications in ME switching devices or high-density data storage.However,realizing a sufficiently strong ME effect in one single material is always the key issue.Herein,we systematically investigate the Co_(3)NiNb_(2)O_(9),including the characterization of its crystalline structure,magnetism,specific heat,and pyroelectric properties.It is revealed that Co_(3)NiNb_(2)O_(9) exhibits a remarkable ME response below the magnetic phase transition temperature of TN-32 K.On one hand,the magnetic field-induced electric polarization is observed below TN while it is non-ferroelectric at no magnetic field.The evaluated ME coefficient is as large as 21.2 ps/m.On the other hand,the magnetization is significantly modulated by the applied electric field,with the inverse ME coefficient being 14.1 ps/m.The observed ME responses suggest a stable ME mutual control by the magnetic or electric field in Co_(3)NiNb_(2)O_(9). | Xiang Li Yu Wang Meifeng Liu Yunlong Xie Jiahua Min Xiyu Chen Jingwen Gong Leiyu Li Min Zeng Yiming Xu Yiru Wang Biwen Li Xiuzhang Wang Jun-Ming Liu | 2021 | Journal of Materiomics2021，7，4： | 0 |
| 18 | Chemically Modified Lignin:Correlation between Structure and Biodegradability显示文摘Lignin is the most abundant heteropolymer based on aromatic subunits in nature.Large quantities of lignin are annually produced from pulping processes and biorefinery industries.Its unclearly defined structure and difficult biodegradation mainly limit its utilization.This work focused on the effect of hydroxylation of lignin on its microbial degradation.Butyloxy carbonyl-modified lignin,and hydroxylated-lignin were synthesized with di-tert-butyl dicarbonate and hydrogen peroxide,respectively,using lignin as raw material.The degradation of the modifiedlignins both by P.chrysosporium and B.subtilis were analyzed using UV-vis spectroscopy.Results revealed that the lignin degradation velocity raises with the increase hydroxylation level of lignin.Moreover,FTIR and 1H NMR analysis of the biodegradation products of lignin further indicated that higher content of hydroxyl groups in lignin facilitated the demethylation combined with the aromatic ring cracking in the presence of fungus and bacteria. | Meifeng Wang Wubliker Dessie Hui Li | 2021 | Journal of Renewable Materials2021，9，12： | 0 |
| 19 | A Fingerprinting Method Based on Module Extraction Used to Protect Intellectual Property显示文摘Intellectual Property (IP) reuse methodology has been widely used in Integrate Circuit (IC) design. Meanwhile, the corresponding security problems caused by illegal IP distribution have aroused lots of attentions. Unlike using IP watermark to identify IP’s ownership, IP fingerprinting can be used to trace illegal distributor. In this paper, IP buyer’s fingerprint is mapped into different derived instances of extracted modules, and then is embedded into IP to identify distributor in case of illegal distribution. Comparing with other fingerprinting method, the proposed method has some good characteristics such as low design effort, small storage demand, high security and few physical overheads. | MIAO Sheng DAI Guanzhong LIU Hang LI Meifeng | 2006 | Wuhan University Journal of Natural Sciences2006，11，6： | 0 |
| 20 | Interaction between in situ stress states and tectonic faults:A comment显示文摘Understanding the in situ stress state is crucial in many engineering problems and earth science research.The present article presents new insights into the interaction mechanism between the stress state and faults.In situ stresses can be influenced by various factors,one of the most important being the existence of faults.A fault could significantly affect the value and direction of the stress components.Reorientation and magnitude changes in stresses exist adjacent to faults and stress jumps/discontinuities across the fault.By contrast,the change in the stress state may lead to the transformation of faulting type and potential fault reactivation.Qualitative fault reactivation assessment using characteristic parameters under the current stress environment provides a method to assess the slip tendency of faults.The correlation between in situ stresses and fault properties enhances the ability to predict the fault slip tendency via stress measurements,which can be used to further refine the assessment of the fault reactivation risk.In the future,stress measurements at greater depths and long-term continuous real-time stress monitoring near/on key parts of faults will be essential.In addition,much attention needs to be paid to distinguishing the genetic mechanisms of abnormal stress states and the type and scale of stress variations and exploring the mechanisms of pre-faulting anomaly and fault reactivation. | Peng Li Meifeng Cai Mostafa Gorjian Fenhua Ren Xun Xi Peitao Wang | 2023 | International Journal of Minerals,Metallurgy and Materials2023，30，7： | 0 |
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