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| 1 | Air-sea heat flux exchange over the South China Sea under different weather conditions before and after southwest monsoon onset in 2000显示文摘With the data observed from the Second SCS Air-Sea Flux Experiment on the Xisha air-sea flux research tower, the radiation budget, latent, sensible heat fluxes and net oceanic heat budgetswere caculated before and after summer monsoon onset. It is discovered that, after summer monsoononset, there are considerable changes in air-sea fluxes, especially in latent heat fluxes and net oceanicheat budget. Furthermre, the analyzed results of five synoptic stages are compared. And the character-istics of the flux transfer during different stages around onset of South China Sea monsoon are discussed.The flux change shows that there is an oceanic heat accumulating process during the pre-onset and thebreak period, as same as oceanic heat losing process during the onset period. Moreover, latent fluxes,the water vapor moving to the continent, even the rainfall appearance in Chinese Mainland also can beinfluenced by southwester. Comparing Xisha fluxes with those obtained from the Indian Ocean and thewestern Pacific Ocean, their differences may be obeerved. It is the reason why SSTs can keep stableover the South China Sea while they decrease quickly over the Arabian Sea and the Bay of Bengal aftermonsoon onset. | Junyue Yan, Huadong Yao, Jianglong Li, Zhiyi Tang, Guorong Jiang, Wenyu Sha, Xunqiang Li, Yiguo Xiao National Climate Center, Beijing 100081, China. E-mail: yanjy@cma.gov.cnPLA University of Science Technology, Nanjing 211101, China | 2003 | Acta Oceanologica Sinica2003，22，3： | 8 |
| 2 | A WiFi Fingerprint Based High-Adaptability Indoor Localization via Machine Learning显示文摘For received signal strength(RSS)fingerprint based indoor localization approaches,the localization accuracy is significantly influenced by the RSS variance,device heterogeneity and environment complexity.In this work,we present a high-adaptability indoor localization(HAIL)approach,which leverages the advantages of both relative RSS values and absolute RSS values to achieve robustness and accuracy.Particularly,a backpropagation neural network(BPNN)is devised in HAIL to measure the fingerprints similarities based on absolute RSS values.With this aid,the characteristics of the applied area could be specially learned such that HAIL could be adaptive to different environments.The experiments demonstrate that HAIL achieves high localization accuracy with the average localization error of 0.87 m in the typical environments.Moreover,HAIL has the minimum amount of large errors and decreases the average localization error by about 30%~50%compared with the existing approaches. | Jianzhe Xue Junyu Liu Min Sheng Yan Shi Jiandong Li | 2020 | China Communications2020，17，7： | 5 |
| 3 | Characterization of VOC emissions from construction machinery and river ships in the Pearl River Delta of China显示文摘Speciated characterization of Volatile Organic Compounds (VOCs),including oxygenated VOCs (OVOCs),from construction machinery and river ships in China is currently lacking.In this regard,we conducted field measurement on speciated VOC (including OVOC) emissions from six construction machinery and five river ships in the Pearl River Delta (PRD) region to identify VOC emission characteristics.We noticed that OVOC emissions from construction machinery and ships accounted for more than 50%of the total VOC emissions,followed by alkenes,aromatics and alkanes.Formaldehyde and acetaldehyde were the most emission species,accounting for 61.8%-83.2%of OVOCs.For construction machinery,the fuel-based emission factors of roller,grader and pile driver were 3.12,3.12 and 7.36 g/kg,respectively.With the rigorous restraint by the national emission standards,VOC emissions of construction machinery had decreased considerably,especially during stageⅢ.Ozone formation potential was also significantly reduced due to the significant decrease in emissions of OVOCs and alkenes with higher reactivity.For river ships,the fuel-based emission factors of cargo ships and speedboat were 1.46 and 0.44 g/kg,respectively.VOC emissions from construction machinery and river ships in Guangdong Province in 2017 were 8851.0 and 4361.0 ton,respectively.This study filled the knowledge gaps of reactive gas emissions from different kinds of non-road mobile sources over the PRD,and more importantly,highlighted the necessity in adding OVOC measurement to give a complete and accurate depiction of reactive gas emissions from non-road mobile sources. | Richao Wang Zibing Yuan Junyu Zheng Cheng Li Zhijiong Huang Wenshi Li Yan Xie Yiran Wang Kaiyang Yu Lejun Duan | 2020 | Journal of Environmental Sciences2020，32，10： | 5 |
| 4 | Efficient synthesis of lithium rare-earth tetrafluoride nanocrystals via a continuous flow method显示文摘As an important upconversion illuminant material, LiREF4 nanocrystals were efficiently synthesized in a continuous reactor with the assistant of a new precursor solution. The employed trioctylamine solvent in the solution had a strong interaction with HF, and helped to avoid the generation of unnecessary solid components as LiF and NH4REF4 during the reaction. A silicon carbide reactor was developed to carry out the synthesis reaction, where LiYF4:Yb,Er/Ho/Tm quickly nucleated in 5 min at 300℃. The reaction time to successfully prepare 15 nm sized nanocrystals was less than 30 min, and the space-time yield of the flow synthesis method was 14.8 times that of a control group batch reaction. The prepared nanocrystals had a strong illuminant ability, which could find its use in the area of security mark printing. | Jinsong Sui Junyu Yan Kai Wang Guangsheng Luo | 2020 | Nano Research2020，13，10： | 4 |
| 5 | Mechanical and Tribological Study of PVA–pMPDSAH Double-Network Hydrogel Prepared by Ultraviolet Irradiation and Freeze–Thaw Methods for Bionic Articular Cartilage显示文摘Hydrogel has been widely used in the research of bionic articular cartilage due to their similarity in structure and functional properties to natural articular cartilage.In this research,polyvinyl alcohol and betaine monomer were used as raw materials to prepare a high-strength double-network hydrogel by a combination of ultraviolet(UV)irradiation and freeze–thaw methods.The structure of samples was characterized by Fourier transform infrared spectroscopy and X-ray diff raction,and the morphology of the samples was characterized by scanning electron microscope and three-dimensional white light interferometer.In addition,we also studied the swelling ratio,water content,mechanical properties and tribological properties of the samples.We found that the addition of betaine monomer and the UV irradiation time had a positive eff ect on the mechanical properties and tribological properties of the samples. | Junyue Chen Lingling Cui Chengqi Yan Dangsheng Xiong | 2021 | Journal of Bionic Engineering2021，18，5： | 2 |
| 6 | Numerical Simulation of Water and Sand Blowouts When Penetrating Through Shallow Water Flow Formations in Deep Water Drilling显示文摘In this study, we applied a two-phase flow model to simulate water and sand blowout processes when penetrating shallow water flow(SWF) formations during deepwater drilling. We define ‘sand' as a pseudo-component with high density and viscosity, which can begin to flow with water when a critical pressure difference is attained. We calculated the water and sand blowout rates and analyzed the influencing factors from them, including overpressure of the SWF formation, as well as its zone size, porosity and permeability, and drilling speed(penetration rate). The obtained data can be used for the quantitative assessment of the potential severity of SWF hazards. The results indicate that overpressure of the SWF formation and its zone size have significant effects on SWF blowout. A 10% increase in the SWF formation overpressure can result in a more than 90% increase in the cumulative water blowout and a 150% increase in the sand blowout when a typical SWF sediment is drilled. Along with the conventional methods of well flow and pressure control, chemical plugging, and the application of multi-layer casing, water and sand blowouts can be effectively reduced by increasing the penetration rate. As such, increasing the penetration rate can be a useful measure for controlling SWF hazards during deepwater drilling. | REN Shaoran LIU Yanmin GONG Zhiwu YUAN Yujie YU Lu WANG Yanyong XU Yan DENG Junyu | 2018 | Journal of Ocean University of China2018，17，1： | 2 |
| 7 | Efficiency of cotton bollworm (Helicoverpa armigera Hübner) control of different Bt cotton varieties in North China显示文摘Background: The cotton bollworm(Helicoverpa armigera) is one of cotton's most destructive insect pests in terms of yield and quality. Since 1997, China has grown commercially available transgenic Bacillus thuringiensis(Bt) cotton. We aimed to investigate the variation in resistance of transgenic Bt cotton varieties to cotton bollworm in North China.Methods: Populations of cotton bollworm were monitored from 2008 to 2015 in environments where Bt cotton was planted adjacent to other non-Bt crops. The study included 197 Bt cotton varieties planted in 42 counties/locations in three provinces(Hebei, Shandong and Henan) of North China, which were evaluated through field investigations,bioassays, and enzyme-linked immunosorbent assays(ELISA).Results: The average number of cotton bollworms never exceeded the action threshold(10 larvae per 100 cotton plants), however, their number reached 19.55 per 100 cotton plants in 2011. The ratios of damaged plants to total Bt cotton stem-tips, buds, and bolls was low except in 2010, when the ratios reached 1.82%, 2.09%, and 10.63%,respectively. The results of bioassay showed that the corrected mortality were higher at the second generation cotton bollworm stage than the third and fourth germination stages. Totally, Bt protein content declined sharply at the seedling stage from 2008 to 2015.Conclusions: This study indicated that almost all Bt cotton varieties were capable to effectively control the populations of cotton bollworm in North China. | Lü Limin LUO Junyu ZHANG Shuai YU Qianlin MA Ligang LIU Xiaofeng WANG Chunyi MA Xiaoyan MA Yan CUI Jinjie | 2018 | Journal of Cotton Research2018，1，1： | 1 |
| 8 | Genotypic variation in grain mercury accumulation of lowland rice显示文摘 | Zhu C Shen GM Yan YP He Junyu | 2008 | Journal of Plant Nutrition and Soil Science2008，171，2： | 1 |
| 9 | Continuous synthesis of ultrasmall core-shell upconversion nanoparticles via a flow chemistry method显示文摘A continuous synthesis method for the less than 10 nm core-shell upconversion nanoparticles was developed via coiled tube embedded flask reactors and a flow solvothermal co-participation reaction up to 300℃.Fast nucleation of hexagonal nanocrystals in less than 9 min residence time was achieved owing to the excellent heating ability of the reactors,and a two-step reaction strategy was created for the synthesis of β-NaYF4:Gd,Yb,Er/Ho/Tm@NaYF_(4) particles without intermediate purification. | Di Liu Junyu Yan Kai Wang Yundong Wang Guangsheng Luo | 2022 | Nano Research2022，15，2： | 1 |
| 10 | Accumulation of copper in brown rice and effect of copper on rice growth and grain yield in different rice cultivars显示文摘 | YuPing Yan JunYu He Cheng Zhu | 2006 | Chemosphere2006，65，： | 1 |
| 11 | Haemorrhage risk of brain arteriovenous malformation during pregnancy and puerperium显示文摘Background This study aimed to assess whether pregnancy and puerperium were associated with the risk of brain arteriovenous malformation(bAVM)haemorrhage.Methods A retrospective review was conducted in Xiangya Hospital,Central South University from January 2012 to December 2021.A case-crossover design was adopted to calculate the incidence density of bAVM-related haemorrhage among female patients in risk(pregnancy and puerperium)and control(non-pregnancy and non-puerperium)periods,according to four scenarios observed in different populations scenario I:patients with haemorrhagic bAVM of all ages;scenario II:patients with haemorrhagic bAVM of all ages,with at least one previous pregnancy;scenario III:patients with haemorrhagic bAVM who are of reproductive age(15-45 years);scenario IV:patients with haemorrhagic bAVM of reproductive age(15-45 years),with at least one previous pregnancy.Next,a comprehensive literature aggregation(up to April 2022)was performed for evidence synthesis.Results Among the 311 female patients with haemorrhagic bAVM,a significant haemorrhage risk during pregnancy and puerperium was found in Scenarios I(relative risk[RR],2.08;95%CI,1.28 to 3.39),II(RR,3.21;95%CI,1.95 to 5.31)and IV(RR,2.92;95%CI,1.73 to 4.93);however,a suggestive risk was found in scenario III(RR,1.62;95%CI,0.99 to 2.67).Evidence synthesis revealed a consistent haemorrhage risk among patients of all ages(RR,3.15;95%CI,1.93 to 5.15)and those of reproductive age(RR,1.29;95%CI,0.89 to 1.86).Conclusion Compared with most previous studies,a higher but relatively moderate risk for bAVM-related haemorrhage was identified during pregnancy and puerperium.Individualised prevention and treatment strategies should be preferred when neurosurgeons make clinical decisions. | Junyu Liu Honghao Zhang Chun Luo Yuxin Guo Yifeng Li Dun Yuan Weixi Jiang Junxia Yan | 2023 | Stroke & Vascular Neurology2023，8，4： | 1 |
| 12 | Mechanical and Biotribological Properties of PVA/SB Triple-Network Hydrogel for Biomimetic Artificial Cartilage显示文摘Poly (vinyl alcohol) hydrogel has been perceived as a promising replacement for articular cartilage due to its superior water-absorption ability and excellent biocompatibility, but its mechanical properties are still insufficient. In this study, the poly (vinyl alcohol)/sodium tetraborate triple-network (PVA/SB TN) hydrogel was developed by repeated freeze–thaw method. Scanning electron microscopy images demonstrated that the structure of as-prepared hydrogels was three-dimensional porous network structure similar to that of natural articular cartilage. Compared to the pure PVA hydrogel, the mechanical performance of the PVA/SB TN hydrogels were improved by 116% and 461% in tensile and compressive strengths, respectively. This was mainly because that the complexation reaction between the PVA and SB strengthened the stability of the hydrogel network. Notably, the biotribological performance of PVA hydrogel has also been improved significantly. Even at high load, the friction coefficient of the PVA/SB TN hydrogel was both very low in calf serum or deionized water. This PVA/SB TN hydrogel with good mechanical property and low friction has high application potential in cartilage repair. | Lingling Cui Junyue Chen Chengqi Yan Dangsheng Xiong | 2023 | Journal of Bionic Engineering2023，20，3： | 1 |
| 13 | GPR160 is a potential biomarker associated with prostate cancer显示文摘Dear Editor,Prostate cancer(PC)is one of the most common noncutaneous cancers among men worldwide with a relatively higher incidence and mortality rate.1 Conventional screening for prostate cancer relies on prostate-specific antigen(PSA),a valuable biomarker but has some deficiencies.Radical prostatectomy,androgen ablation,and radiotherapy are still commonly used treatments for localized prostate cancer. | Wanjing Guo Junyu Zhang Yan Zhou Caihong Zhou Yunjie Yang Zhaotong Cong Jibin Dong Dehua Yang Bo Dai Ming-Wei Wang | 2021 | Signal Transduction and Targeted Therapy2021，6，7： | 0 |
| 14 | Association of 2-methoxyestradiol levels with the occurrence and development of endometrial cancer in humans显示文摘Objective The aim of the study was to determine the association of urinary levels of estradiol(E_(2))and 2-methoxyestradiol(2-MeOE_(2))with the occurrence and development of endometrial cancer.Methods In this case-control study,24-h urine specimens were collected from 28 postmenopausal patients with endometrial cancer and 28 postmenopausal healthy female controls.The concentration of 2-MeOE_(2) was determined using liquid chromatography-mass spectrometry with hollow fiber liquid-phase microextraction.The concentration of E_(2) was determined using an enzyme-linked immunosorbent assay.Results Estrogen levels were different between the patients with endometrial cancer and controls.The relative quantity of E_(2) in the case group was higher than that in the control group(P<0.05),whereas that of 2-MeOE_(2) was lower in the case group than that in the control group(P<0.05).The ratio of E_(2)-to-2-MeOE_(2) in the case group was significantly higher than that in the control group(P<0.05).Conclusion The results of this study indicate an imbalance of estrogen metabolites in endometrial carcinogenesis.Reduced 2-MeOE_(2) levels and elevated E_(2)-to-2-MeOE_(2) ratio may be used as potential biomarkers for the risk assessment of estrogen-induced endometrial cancer. | Huanhuan Zhao Junyu Li Yan Liu Li Li | 2022 | Oncology and Translational Medicine2022，8，4： | 0 |
| 15 | New Discovery of the Devonian Orthoclase Granite of Nenjiang–Heihe Structural belt, China and its Zircon U-Pb Data显示文摘Objective The Nenjiang–Heihe structural belt is located in the eastern Xing’anling Mongolian Orogenic Belt between the Songnen block and Xiang’an block.This structural belt has long been the focus of geological scholars(Miao Laicheng et al.,2003;Liang Chenyue et al.,2011;Li Chao et al.,2017),which has complex geological condition, | YANG Fan NA Fuchao ZHANG Guangyu WANG Yan FU Junyu SUN Wei CHEN Jingsheng LI Bin LIU Miao PANG Xuejiao SHI Yi SHI Lu | 2018 | Acta Geologica Sinica(English Edition)2018，92，2： | 0 |
| 16 | Engineering Research Progress of Electrochemical Microreaction Technology—A Novel Method for Electrosynthesis of Organic Chemicals显示文摘Electrochemical methods are environmentally friendly and have unique advantages in the synthesis of organic chemicals.However,their implementation is limited due to the complex transport problems posed by traditional electrochemical reactors.Recently,the application of microreaction technology in electrosynthesis studies has reduced the transport distance of ions and increased the specific surface area of electrodes,leading to efficient,successive,and easily scaled-up electrosynthesis technologies.In this review article,engineering advantages of using microchannels in electrosynthesis are discussed from process enhancement perspective.Flow patterns and mass transfer behaviors in recently reported electrochemical microreactors are analyzed,and prototypes for the reactor scale-up are reviewed.As a relatively new research area,many scientific rules and engineering features of electrosynthesis in microreactors require elucidation.Potential research foci,considered crucial for the development of novel electrosynthesis technology,are therefore proposed. | Siyuan Zheng Junyu Yan Kai Wang | 2021 | Engineering2021，7，1： | 0 |
| 17 | State-of-the-art applications of machine learning in the life cycle of solid waste management显示文摘Due to the superiority of machine learning(ML)data processing,it is widely used in research of solid waste(SW).This study analyzed the research and developmental progress of the applications of ML in the life cycle of SW.Statistical analyses were undertaken on the literature published between 1985 and 2021 in the Science Citation Index Expanded and Social Sciences Citation Index to provide an overview of the progress.Based on the articles considered,a rapid upward trend from 1985 to 2021 was found and international cooperatives were found to have strengthened.The three topics of ML,namely,SW categories,ML algorithms,and specific applications,as applied to the life cycle of SW were discussed.ML has been applied during the entire SW process,thereby affecting its life cycle.ML was used to predict the generation and characteristics of SW,optimize its collection and transportation,and model the processing of its energy utilization.Finally,the current challenges of applying ML to SW and future perspectives were discussed.The goal is to achieve high economic and environmental benefits and carbon reduction during the life cycle of SW.ML plays an important role in the modernization and intellectualization of SW management.It is hoped that this work would be helpful to provide a constructive overview towards the state-of-the-art development of SW disposal. | Rui Liang Chao Chen Akash Kumar Junyu Tao Yan Kang Dong Han Xianjia Jiang Pei Tang Beibei Yan Guanyi Chen | 2023 | Frontiers of Environmental Science & Engineering2023，17，4： | 0 |
| 18 | Study on creep deformation and energy development of underground surrounding rock under four‐dimensional support显示文摘There is an urgent need to develop optimal solutions for deformation control of deep high‐stress roadways,one of the critical problems in underground engineering.The previously proposed four‐dimensional support(hereinafter 4D support),as a new support technology,can set the roadway surrounding rock under three‐dimensional pressure in the new balanced structure,and prevent instability of surrounding rock in underground engineering.However,the influence of roadway depth and creep deformation on the surrounding rock supported by 4D support is still unknown.This study investigated the influence of roadway depth and creep deformation time on the instability of surrounding rock by analyzing the energy development.The elastic strain energy was analyzed using the program redeveloped in FLAC3D.The numerical simulation results indicate that the combined support mode of 4D roof supports and conventional side supports is highly applicable to the stability control of surrounding rock with a roadway depth exceeding 520 m.With the increase of roadway depth,4D support can effectively restrain the area and depth of plastic deformation in the surrounding rock.Further,4D support limits the accumulation range and rate of elastic strain energy as the creep deformation time increases.4D support can effectively reduce the plastic deformation of roadway surrounding rock and maintain the stability for a long deformation period of 6 months.As confirmed by in situ monitoring results,4D support is more effective for the long‐term stability control of surrounding rock than conventional support. | Zhanguo Ma Junyu Sun Peng Gong Pengfei Yan Nan Cui Ruichong Zhang | 2024 | Deep Underground Science and Engineering2024，3，1： | 0 |
| 19 | A non-ACE2-blocking neutralizing antibody against Omicron-included SARS-CoV-2 variants显示文摘Dear Editor,The emergence of severe acute respiratory syndrome coronavirus-2(SARS-CoV-2)variants threatens efforts to contain the coronavirus disease 2019(COVID-19)pandemic.Omicron(B.1.1.529),the fifth novel SARS-CoV-2 variant of concern(VOC),harbors 15 mutations in the receptor-binding domain(RBD)of the spike(S)protein.1 These mutations include almost all the sites of existing VOCs(Alpha/B.1.1.7,Beta/B.1.351,Gamma/P.1,and Delta/B.1.617.2).2–4 Importantly,the key mutations directly interact with the ACE2 receptor and constitute the main target of neutralizing antibodies(NAbs),which is believed to alter the sensitivity to a large number of NAbs. | Xiaomin Duan Rui Shi Pulan Liu Qingrui Huang Fengze Wang Xinyu Chen Hui Feng Weijin Huang Junyu Xiao Jinghua Yan | 2022 | Signal Transduction and Targeted Therapy2022，7，2： | 0 |
| 20 | Prediction of high-density polyethylene pyrolysis using kinetic parameters based on thermogravimetric and artificial neural networks显示文摘Pyrolysis is considered an attractive option and a promising way to dispose waste plastics.The thermogravimetric experiments of high-density polyethylene(HDPE)were conducted from 105℃ to 900℃ at different heating rates(10℃/min,20℃/min,and 30℃/min)to investigate their thermal pyrolysis behavior.We investigated four methods including three model-free methods and one modelfitting method to estimate dynamic parameters.Additionally,an artificial neural network model was developed by providing the heating rates and temperatures to predict the weight loss(wt.%)of HDPE,and optimized via assessing mean squared error and determination coefficient on the test set.The optimal MSE(2.6297×10^(−2))and R^(2) value(R^(2)>0.999)were obtained.Activation energy and preexponential factor obtained from four different models achieves the acceptable value between experimental and predicted results.The relative error of the model increased from 2.4%to 6.8%when the sampling frequency changed from 50 s to 60 s,but showed no significant difference when the sampling frequency was below 50 s.This result provides a promising approach to simplify the further modelling work and to reduce the required data storage space.This study revealed the possibility of simulating the HDPE pyrolysis process via machine learning with no significant accuracy loss of the kinetic parameters.It is hoped that this work could potentially benefit to the development of pyrolysis process modelling of HDPE and the other plastics. | Xiaoxiao Yin Junyu Tao Guanyi Chen Xilei Yao Pengpeng Luan Zhanjun Cheng Ning Li Zhongyue Zhou Beibei Yan | 2023 | Frontiers of Environmental Science & Engineering2023，17，1： | 0 |
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