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61篇 您的检索式:作者名="Xinhui YU"
    题名 作者 年代 出处 被引量
1Approximate Maximum Likelihood Algorithm for Moving Source Localization Using TDOA and FDOA Measurements显示文摘A closed-form approximate maximum likelihood(AML) algorithm for estimating the position and velocity of a moving source is proposed by utilizing the time difference of arrival(TDOA) and frequency difference of arrival(FDOA) measurements of a signal received at a number of receivers.The maximum likelihood(ML) technique is a powerful tool to solve this problem.But a direct approach that uses the ML estimator to solve the localization problem is exhaustive search in the solution space,and it is very computationally expensive,and prohibits real-time processing.On the basis of ML function,a closed-form approximate solution to the ML equations can be obtained,which can allow real-time implementation as well as global convergence.Simulation results show that the proposed estimator achieves better performance than the two-step weighted least squares(WLS) approach,which makes it possible to attain the Cramér-Rao lower bound(CRLB) at a sufficiently high noise level before the threshold effect occurs.YU Huagang HUANG Gaoming GAO Jun WU Xinhui 2012Chinese Journal of Aeronautics2012,25,4:28
2Changes in visibility with PM_(2.5) composition and relative humidity at a background site in the Pearl River Delta region显示文摘In fall–winter, 2007–2013, visibility and light scattering coefficients(b sp) were measured along with PM_(2.5)mass concentrations and chemical compositions at a background site in the Pearl River Delta(PRD) region. The daily average visibility increased significantly(p < 0.01) at a rate of 1.1 km/year, yet its median stabilized at ~13 km. No haze days occurred when the 24-hr mean PM_(2.5)mass concentration was below 75 μg/m^3. By multiple linear regression on the chemical budget of particle scattering coefficient(b sp), we obtained site-specific mass scattering efficiency(MSE) values of 6.5 ± 0.2, 2.6 ± 0.3, 2.4 ± 0.7 and 7.3 ± 1.2 m2/g,respectively, for organic matter(OM), ammonium sulfate(AS), ammonium nitrate(AN) and sea salt(SS). The reconstructed light extinction coefficient(b ext) based on the Interagency Monitoring of Protected Visual Environments(IMPROVE) algorithm with our site-specific MSE revealed that OM, AS, AN, SS and light-absorbing carbon(LAC) on average contributed 45.9% ± 1.6%,25.6% ± 1.2%, 12.0% ± 0.7%, 11.2% ± 0.9% and 5.4% ± 0.3% to light extinction, respectively.Averaged b ext displayed a significant reduction rate of 14.1/Mm·year(p < 0.05); this rate would be 82% higher if it were not counteracted by increasing relative humidity(RH) and hygroscopic growth factor(f(RH)) at rates of 2.5% and 0.16/year-1(p < 0.01), respectively, during the fall–winter, 2007–2013. This growth of RH and f(RH) partly offsets the positive effects of lowered AS in improving visibility, and aggravated the negative effects of increasing AN to impair visibility.Xiaoxin Fu Xinming Wang Qihou Hu Guanghui Li Xiang Ding Yanli Zhang Quanfu He Tengyu Liu Zhou Zhang Qingqing Yu Ruqing Shen Xinhui Bi 2016Journal of Environmental Sciences2016,28,2:18
3Characteristics of dissolved organic matter in lakes with different eutrophic levels in southeastern Hubei Province,China显示文摘Dissolved organic matter(DOM)plays a crucial role in both the carbon cycle and geochemical cycles of other nutrient elements,which is of importance to the management and protection of the aquatic environments.To achieve a more comprehensive understanding the characteristics of DOM in the Changjiang(Yangtze)River basin,water samples from four natural lakes(Xiandao,Baoan,Daye,and Qingshan)in southeastern Hubei Province in China with different eutrophication levels were collected and analyzed.The optical characteristics were analyzed using ultraviolet-visible spectrophotometry and excitation-emission matrix spectroscopy coupled with parallel factor analysis.The results show that:(1)two humic-like components(C1 and C2)and two protein-like substances(C3 and C4)of DOM were identified in all waterbodies;(2)C3 originated primarily from the degradation of microalgae and contributed substantially to humic-like components during transformation.C4 was widely present in the Changjiang River basin and its formation was related to microbial activity,rather than algal blooms or seasons.Influenced by the water mixing,the protein-like components were more likely to be transformed by microorganism,whereas humic-like components were more easily to be photobleached;(3)the concentration of DOM and the fluorescence intensity of humic-like components gradually increased with rising lake eutrophication levels.With respect to protein-like components,only C3 showed changes along the eutrophication gradients;(4)DOM showed a high affinity with permanganate index(COD Mn)and chlorophyll a(chl a)while the relationship was variable with phosphorus.This study helps us systematically understand the DOM characteristics,microbial activities,and pollutant transformation in the Changjiang River basin and provides reference to the ecological restoration of aquatic environments.Weixiang REN Xiaodong WU Xuguang GE Guiying LIN Mengdie ZHOU Zijie LONG Xinhui YU Wei TIAN 2021Journal of Oceanology and Limnology2021,39,4:8
4Facile fabrication of integrated three-dimensional C- MoSe2/reduced graphene oxide composite with enhanced performance for sodium storage显示文摘先进电极材料的谨慎小心的设计和制造为开发高效的钠离子电池是重要的。此处,我们报导一出灵巧的一步舞为与高孔和大表面区域合成的 C-MoSe 2/rGO 的建设的热水的策略。MoSe 2 nanosheets 的两倍修正在这被认识到由介绍减少的 graphene 氧化物(rGO ) 合成骨骼和外部碳保护的层。MoSe 2 nanosheets 被碳层很好包并且强烈也在互连的 rGO 网络上抛锚了。作为在钠离子电池的阳极,设计 C-MoSe 2/rGO 合成交付显著地提高的钠离子存储,与 445 mAh 潨灳瑩的一个高特定的能力?Dong Xie Wangjia Tang Yadong Wang Xinhui Xia Yu Zhong Ding Zhou DonghuangWang Xiuli Wang Jiangping Tu 2016Nano Research2016,9,6:7
5The zinc transporter Slc39a5 controls glucose sensing and insulin secretion in pancreatic β-cells via Sirt1- and Pgc-1α-mediated regulation of Glut2显示文摘Zinc levels are high in pancreatic β-cells, and zinc is involved in the synthesis, processing and secretion of insulin in these cells. However, precisely how cellular zinc homeostasis is regulated in pancreatic β-cells is poorly understood. By screening the expression of 14 Slc39a metal importer family member genes, we found that the zinc transporter Slc39a5 is significantly downregulated in pancreatic β-cells in diabetic db/db mice, obese ob/ob mice and high-fat diet-fed mice. Moreover,β-cell-specific Slc39a5 knockout mice have impaired insulin secretion. In addition, Slc39a5-deficient pancreatic islets have reduced glucose tolerance accompanied by reduced expression of Pgc-1α and its downstream target gene Glut2. The down-regulation of Glut2 in Slc39a5-deficient islets was rescued using agonists of Sirt1, Pgc-1α and Ppar-γ. At the mechanistic level, we found that Slc39a5-mediated zinc influx induces Glut2 expression via Sirt1-mediated Pgc-1α activation. These findings suggest that Slc39a5 may serve as a possible therapeutic target for diabetes-related conditions.Xinhui Wang Hong Gao Wenhui Wu Enjun Xie Yingying Yu Xuyan He Jin Li Wanru Zheng Xudong Wang Xizhi Cao Zhuoxian Meng Ligong Chen Junxia Min Fudi Wang 2019Protein & Cell2019,10,6:6
6Design and test of fault monitoring system for corn precision planter显示文摘With the growing demand and working complexity of corn precision planter,it becomes more important to monitor the working performance through intelligent systems.A new fault monitoring system for corn precision planters was designed and tested.This system consisted of the information acquisition module,controller module,alarm module,input module and display module.A capacitive sensor was utilized to monitor the seed flow without changing the track of a precision planter.This system can monitor the whole sowing process of a seed-metering device in real-time.The sowing status,fault type and fault location can be displayed on liquid crystal display(LCD).Warning light on the LCD reminds the operator of abnormal conditions.Bench tests and field tests showed that the minimum monitoring accuracies of missing sowing and total sowing number were 92.11%and 94.28%,respectively,and the seed level sensor and the opener sensor worked well.This system can accurately prompt the seed-metering mechanism in real-time.Qi Jiangtao Jia Honglei Li Yang Yu Haibo Liu Xinhui Lan Yubin Feng Xianzhen Yang Yongxi 2015International Journal of Agricultural and Biological Engineering2015,8,6:6
7Is there an association between Helicobacter pylori infection and irritable bowel syndrome? A meta-analysis显示文摘BACKGROUND Irritable bowel syndrome(IBS)is a prevalent and debilitating gastrointestinal condition.Research has reported persistent,low-grade mucosal inflammation and significant overlaps between patients with IBS and those with dyspepsia,suggesting a possible pathogenic role of Helicobacter pylori(H.pylori)in IBS.This study therefore aimed to provide the first systematic review and meta-analysis on the association between H.pylori infection and IBS.AIM To investigate the association between H.pylori infection and IBS.METHODS Using the keywords“H.pylori OR Helicobacter OR Helicobacter pylori OR infection”AND“irritable bowel syndrome OR IBS”,a preliminary search of PubMed,Medline,Embase,Cochrane Database of Systematic Reviews,Web of Science,Google Scholar and WanFang databases yielded 2924 papers published in English between 1 January 1960 and 1 June 2018.Attempts were also made to search grey literature.RESULTS A total of 13 clinical studies were systematically reviewed and nine studies were included in the final meta-analysis.Random-effects meta-analysis found a slight increased likelihood of H.pylori infection in patients with IBS,albeit this was not statistically significant(pooled odds ratio 1.47,95%confidence interval:0.90-2.40,P=0.123).It must also be acknowledged that all of the available studies reported only crude odd ratios.H.pylori eradication therapy also does not appear to improve IBS symptoms.Although publication bias was not observed in the funnel plot,there was a high degree of heterogeneity amongst the studies included in the meta-analysis(I2=87.38%).CONCLUSION Overall,current evidence does not support an association between IBS and H.pylori infection.Further rigorous and detailed studies with larger sample sizes and after H.pylori eradication therapy are warranted.Qin Xiang Ng Nadine Xinhui Foo Wayren Loke Yun Qing Koh Vanessa Jing Min Seah Alex Yu Sen Soh Wee Song Yeo 2019World Journal of Gastroenterology2019,25,37:5
8Arabidopsis transcription factor TCP4 represses chlorophyll biosynthesis to prevent petal greening显示文摘Green petals pose a challenge for pollinators to distinguish flowers from leaves,but they are valuable as a specialty flower trait.However,little is understood about the molecular mechanisms that underlie the development of green petals.Here,we report that CINCINNATA(CIN)-like TEOSINTE BRANCHED 1/CYCLOIDEA/PCF(TCP)proteins play key roles in the control of petal color.The septuple tcp2/3/4/5/10/13/17 mutant produced flowers with green petals due to chlorophyll accumulation.Expression of TCP4 complemented the petal phenotype of tcp2/3/4/5/10/13/17.We found that chloroplasts were converted into leucoplasts in the distal parts of wild-type petals but not in the proximal parts during flower development,whereas plastid conversion was compromised in the distal parts of tcp2/3/4/5/10/13/17 petals.TCP4 and most CIN-like TCPs were predominantly expressed in distal petal regions,consistent with the green–white pattern in wild-type petals and the petal greening observed in the distal parts of tcp2/3/4/5/10/13/17 petals.RNA-sequencing data revealed that most chlorophyll biosynthesis genes were downregulated in the white distal parts of wild-type petals,but these genes had elevated expression in the distal green parts of tcp2/3/4/5/10/13/17 petals and the green proximal parts of wild-type petals.We revealed that TCP4 repressed chlorophyll biosynthesis by directly binding to the promoters of PROTOCHLOROPHYLLIDE REDUCTASE(PORB),DIVINYL REDUCTASE(DVR),and SUPPRESSOR OF OVEREXPRESSION OF CO 1(SOC1),which are known to promote petal greening.We found that the conversion of chloroplasts to leucoplasts and the green coloration in the proximal parts of petals appeared to be conserved among plant species.Our findings uncover a major molecular mechanism that underpins the formation of petal color patterns and provide a foundation for the breeding of plants with green flowers.Xinhui Zheng Jingqiu Lan Hao Yu Jingzhe Zhang Yi Zhang Yongmei Qin Xiao-Dong Su Genji Qin 2022Plant Communications2022,3,4:4
9Mechanisms of Traditional Chinese Medicine Bushenantai granules(补肾安胎颗粒) in promoting angiogenesis at the maternal-fetal interface of recurrent spontaneous abortion mice显示文摘OBJECTIVE:To assess the effects of Bushenantai(BSAT)granule(补肾安胎颗粒)on angiogenesis-related factors[E2,P,and vascular endothelial growth factor(VEGF)]at the maternal-fetal interface of recurrent spontaneous abortion(RSA)mice,and to evaluate the role of BSAT in promoting angiogenesis at the maternal-fetal interface by influencing the expression of sex hormones,and VEGF.METHODS:A mouse model with normal pregnancy and another with Clark’s classic RSA were established.The RSA mice were randomly assigned to six groups:normal,model,progesterone,high-doseBSAT granule(BSAT-H),medium-dose-BSAT granule(BSAT-M),and low-dose-BSAT granule(BSAT-L)(n=10 for each group).The embryo loss rate and the histopathological changes in the decidual tissues were measured.Serum levels of estrogen(E2),progesterone(P),and VEGF were detected by enzyme-linked immunosorbent assay.The m RNA and protein expressions of estradiol receptor(ER),progesterone receptor(PR),VEGF,and vascular endothelial growth factor receptor 2(VEGFR2)in the decidual tissues were identified by immunohistochemistry,Western blotting,and quantitative reverse transcription polymerase chain reaction.RESULTS:The embryo loss rate in all groups that received BSAT treatment was reduced,while the number of blood vessels at decidual tissues was increased.The serum levels of E2,P and VEGF were elevated,and the m RNA and protein expressions of ER,PR,VEGF,and VEGFR2 in the decidual tissues were enhanced.CONCLUSION:BSAT can improve angiogenesis at the maternal-fetal interface and reduce the embryo loss rate,which may be associated with its ability to increase the serum levels of estrogen,progesterone,and VEGF,in addition to up-regulation of m RNA and protein expression of ER,PR,VEGF,and VEGFR2 in the decidual tissues.LI Yuanqi LI Weili YU Xinhui WU Hua WANG Yuanzhong JIN Ya HAO Lele LIU Mingmin SONG Xiaoge 2021Journal of Traditional Chinese Medicine2021,41,4:3
10Nationwide distribution of polycyclic aromatic hydrocarbons in soil of China and the association with bacterial community显示文摘Soil contamination by polycyclic aromatic hydrocarbons(PAHs)has raised great environmental concerns.However,the information on national wide distribution of PAHs in soil as well as their effect on soil bacterial community are limited.In this study,16 PAHs weremeasured in 94 soil samples collected across China.The total concentration of 16 PAHs(PAHs)in soil ranged from 74.0 to 17,657 ng/g(dry weight basis),with a median value of 200 ng/g.Pyrene was themajor soil PAH,with amedian concentration of 71.3 ng/g.Soil samples from Northeast China had a higher median concentration ofPAHs(1,961 ng/g)than those from other regions.Petroleum emission and wood/grass/coal combustion were potential sources for soil PAHs based on diagnostic ratios and positive matrix factors analysis.A nonnegligible ecological risk(hazard quotients>1)was found in over 20%of soil samples analyzed and the highestmedian total HQs value(8.53)was found in soils from Northeast China.The effect of PAHs on bacterial abundance,α-diversity,andβ-diversity was limited in the soils surveyed.Nevertheless,the relative abundance of some members in genera Gaiella,Nocardioides,and Clostridium was significantly correlated with the concentrations of some PAHs.Especially,the bacterium Gaiella Occulta showed potential in indicating soil contamination by PAH,which is worth further exploration.Qiuyue Zhang Meng Gao Xinhui Sun Yu Wang Chaolei Yuan Hongwen Sun 2023Journal of Environmental Sciences2023,,6:3
11High-performance all-polymer solar cells enabled by a novel low bandgap non-fully conjugated polymer acceptor显示文摘The non-fully conjugated polymer as a new class of acceptor materials has shown some advantages over its small molecular counterpart when used in photoactive layers for all-polymer solar cells(all-PSCs),despite a low power conversion efficiency(PCE)caused by its narrow absorption spectra.Herein,a novel non-fully conjugated polymer acceptor PFY-2TS with a low bandgap of~1.40 eV was developed,via polymerizing a largeπ-fused small molecule acceptor(SMA)building block(namely YBO)with a non-conjugated thioalkyl linkage.Compared with its precursor YBO,PFY-2TS retains a similar low bandgap but a higher LUMO level.Moreover,compared with the structural analog of YBO-based fully conjugated polymer acceptor PFY-DTC,PFY-2TS shows a similar absorption spectrum and electron mobility,but significantly different molecular crystallinity and aggregation properties,which results in optimal blend morphology with a polymer donor PBDB-T and physical processes of the device in all-PSCs.As a result,PFY-2TS-based all-PSCs achieved a PCE of 12.31%with a small energy loss of 0.56 eV enabled by the reduced non-radiative energy loss(0.24 eV),which is better than that of 11.08%for the PFY-DTC-based ones.Our work clearly demonstrated that non-fully conjugated polymers as a new class of acceptor materials are very promising for the development of high-performance all-PSCs.Qunping Fan Ruijie Ma Tao Liu Jianwei Yu Yiqun Xiao Wenyan Su Guilong Cai Yuxiang Li Wenhong Peng Tao Guo Zhenghui Luo Huiliang Sun Lintao Hou Weiguo Zhu Xinhui Lu Feng Gao Ellen Moons Donghong Yu He Yan Ergang Wang 2021Science China Chemistry2021,64,8:3
12Directional construction of Cu2S branch arrays for advanced oxygen evolution reaction显示文摘Metal sulphide electrocatalyst is considered as one of the most promising low-cost candidates for oxygen evolution reaction(OER).In this work,we report a novel free-standing Cu2S branch array via a facile TiO2-induced electrodeposition-sulfurization method.Interestingly,cross-linked Cu2S nanoflake branch is strongly anchored on the TiO2 backbone forming high-quality Cu2S/TiO2/Cu2S core-branch arrays.The branch formation mechanism is also proposed.As compared to the pure Cu2S nanowire arrays,the asprepared Cu2S/TiO2/Cu2S core-branch arrays show much better alkaline OER performance with lower overpotential(284 mV at 10 mA cm^-2)and smaller Tafel slope(72 dec-1)as well as enhanced longterm durability mainly due to larger exposed area and more active electrocatalytic sites.Our work provides a new way for construction of advanced metal sulphide electrocatalysts for electrochemical energy conversion.Shengjue Deng Yanbin Shen Dong Xie Yangfan Lu Xiaolong Yu Liang Yang Xiuli Wang Xinhui Xia Jiangping Tu 2019Journal of Energy Chemistry2019,28,12:3
13Systematic review of Chinese studies of short-term exposure to air pollution and daily mortality显示文摘Yu Shang Zhiwei Sun Junji Cao Xinming Wang Liuju Zhong Xinhui Bi Hong Li Wenxin Liu Tong Zhu Wei Huang 2013Environment International2013,,:2
14Prognostic Nomogram for Patients with Hepatitis E Virus-related Acute Liver Failure:A Multicenter Study in China显示文摘Background and Aims:Timely and effective assessment scoring systems for predicting the mortality of patients with hepatitis E virus-related acute liver failure(HEV-ALF)are urgently needed.The present study aimed to establish an effective nomogram for predicting the mortality of HEV-ALF patients.Methods:The nomogram was based on a cross-sectional set of 404 HEV-ALF patients who were identified and enrolled from a cohort of 650 patients with liver failure.To compare the performance with that of the model for end-stage liver disease(MELD)scoring and CLIF-Consortiumacute-on-chronic liver failure score(CLIF-C-ACLFs)models,we assessed the predictive accuracy of the nomogram using the concordance index(C-index),and its discriminative ability using time-dependent receiver operating characteristics(td-ROC)analysis,respectively.Results:Multivariate logistic regression analysis of the development set carried out to predict mortality revealed that γ-glutamyl transpeptidase,albumin,total bilirubin,urea nitrogen,creatinine,international normalized ratio,and neutrophil-to-lymphocyte ratio were independent factors,all of which were incorporated into the new nomogram to predict the mortality of HEV-ALF patients.The area under the curve of this nomogram for mortality prediction was 0.671(95%confidence interval:0.602-0.740),which was higher than that of the MELD and CLIF-C-ACLFs models.Moreover,the td-ROC and decision curves analysis showed that both discriminative ability and threshold probabilities of the nomogram were superior to those of the MELD and CLIF-C-ACLFs models.A similar trend was observed in the validation set.Conclusions:The novel nomogram is an accurate and efficient mortality prediction method for HEV-ALF patients.Jian Wu Cuifen Shi Xinyu Sheng Yanping Xu Jinrong Zhang Xinguo Zhao Jiong Yu Xinhui Shi Gongqi Li Hongcui Cao Lanjuan Li 2021Journal of Clinical and Translational Hepatology2021,9,6:2
15Recent Progress in Atmospheric Chemistry Research in China: Establishing a Theoretical Framework for the “Air Pollution Complex”显示文摘Atmospheric chemistry research has been growing rapidly in China in the last 25 years since the concept of the“air pollution complex”was first proposed by Professor Xiaoyan TANG in 1997.For papers published in 2021 on air pollution(only papers included in the Web of Science Core Collection database were considered),more than 24000 papers were authored or co-authored by scientists working in China.In this paper,we review a limited number of representative and significant studies on atmospheric chemistry in China in the last few years,including studies on(1)sources and emission inventories,(2)atmospheric chemical processes,(3)interactions of air pollution with meteorology,weather and climate,(4)interactions between the biosphere and atmosphere,and(5)data assimilation.The intention was not to provide a complete review of all progress made in the last few years,but rather to serve as a starting point for learning more about atmospheric chemistry research in China.The advances reviewed in this paper have enabled a theoretical framework for the air pollution complex to be established,provided robust scientific support to highly successful air pollution control policies in China,and created great opportunities in education,training,and career development for many graduate students and young scientists.This paper further highlights that developing and low-income countries that are heavily affected by air pollution can benefit from these research advances,whilst at the same time acknowledging that many challenges and opportunities still remain in atmospheric chemistry research in China,to hopefully be addressed over the next few decades.Tong ZHU Mingjin TANG Meng GAO Xinhui BI Junji CAO Huizheng CHE Jianmin CHEN Aijun DING Pingqing FU Jian GAO Yang GAO Maofa GE Xinlei GE Zhiwei HAN Hong HE Ru-Jin HUANG Xin HUANG Hong LIAO Cheng LIU Huan LIU Jianguo LIU Shaw Chen LIU Keding LU Qingxin MA Wei NIE Min SHAO Yu SONG Yele SUN Xiao TANG Tao WANG Tijian WANG Weigang WANG Xuemei WANG Zifa WANG Yan YIN Qiang ZHANG Weijun ZHANG Yanlin ZHANG Yunhong ZHANG Yu ZHAO Mei ZHENG Bin ZHU Jiang ZHU 2023Advances in Atmospheric Sciences2023,40,8:2
16Self-supported hierarchical porous Li_(4)Ti_(5)O_(12)/carbon arrays for boosted lithium ion storage显示文摘The development of fast rechargeable lithium ion batteries(LIBs)is highly dependent on the innovation of advanced high-power electrode materials.In this work,for the first time,we report a sacrificial NiO arrays template method for controllable synthesis of self-supported hierarchical porous Li_(4)Ti_(5)O_(12)/C(LTO/C)nanoflakes arrays,for use as fast rechargeable anodes for LIBs.The ultrathin(2-3 nm)carbon layer was uniformly coated on the LTO forming arrays architecture.The hierarchical porous LTO/C nanoflakes consisted of primary cross-linked nanoparticles of 50-100 nm and showed large porosity.Because of the enhanced electrical conductivity and accelerated ion transfer channels,the well-designed binderfree porous LTO/C nanoflakes arrays exhibited notable high-rate lithium ion storage performance with smaller polarization,better electrochemical reactivity,higher specific capacity(157 mAh g^(-1) at the current density of 20C)and improved long-term cycling life(96.2% after 6000 cycles at 20C),superior to the unmodified porous LTO arrays counterpart(126 mAh g^(-1) at 20C and 88.0%after 6000 cycles at 20C).Our work provides a new template for the construction of high-performance high-rate electrodes for electrochemical energy storage.Jun Liu Aixiang Wei Guoxiang Pan Shenghui Shen Zhiming Xiao Yu Zhao Xinhui Xia 2021Journal of Energy Chemistry2021,30,3:2
17Fast screening compositions of PM2.5 by ATR-FTIR: Comparison with results from IC and OC/EC analyzers显示文摘Chemical speciation of fine particles or PM_(2.5) collected on filters is still a costly and timeconsuming task. In this study, filter-based PM_(2.5) samples were collected during November–December 2013 at four sites in Guangzhou, and the major components were fast screened(~7 min per filter sample) by Attenuated Total Reflectance(ATR)-Fourier Transform Infrared Spectroscopic(FTIR) in comparison with that measured by Organic carbon/Element carbon(OC/EC) analyzer and Ion Chromatography(IC). The concentrations of nitrate, ammonium, sulfate,primary organic carbon(POC) and secondary organic carbon(SOC) measured by OC/EC and IC analyzers were better correlated with their infrared absorption peak heights at 1320 cm^(-1) for nitrate, 1435, 3045 and 3215 cm^(-1) for ammonium, 615 cm^(-1) for sulfate, 690, 760 and 890 cm^(-1) for POC and 1640 and 1660 cm^(-1) for SOC respectively, during polluted days(PM_(2.5)> 75 μg/m^3) than during clean days(PM_(2.5)≤ 75 μg/m^3). With the evolution of a haze episode during our field campaign, the concentrations of the major PM_(2.5) components displayed consistent variations with their infrared absorption peak heights, suggesting ATR-FTIR could be a fast and useful technique to characterize filter-based PM_(2.5) compositions particularly during pollution events although cautions should be taken when PM_(2.5) levels are low. Notably, elevated PM_(2.5) mass concentrations occurred with enhanced ratios of [NO_(-3)]/[SO_4^(2-)] and [NH^(+4)]/[SO_4^(2-)], implying that nitrogenous components play vital roles in the PM_(2.5) pollution events in the study region.Xu Yu Wei Song Qingqing Yu Sheng Li Ming Zhu Yanli Zhang Wei Deng Weiqiang Yang Zhonghui Huang Xinhui Bi Xinming Wang 2018Journal of Environmental Sciences2018,30,9:2
18EQUIVALENCE BETWEEN EXACT INTERNAL CONTROLLABILITY OF THE KIRCHHOFF PLATE-LIKE EQUATION AND THE WAVE EQUATION显示文摘When the rotatory inertia is taken into account, vibrations of a linear plate can be described by the Kirchhoff plate equation. Consider this equation with locally distributed control forces and some boundary condition which is the simply supported boundary condition for a rectangular plate. In this paper, the authors establish exact controllability of the system in terms of the equivalence to exact internal controllability of the wave equation, by means of a frequency domain characterization of exact controllability introduced recently in [11].LIU KANGSHENG YU XINHUI 2000Chinese Annals of Mathematics,Series B2000,21,1:1
19Research on Interference Cancellation for Switched-on Small Cells in Ultra Dense Network显示文摘SUN Yang CHANG Yongyu WANG Chao ZHANG Lu ZHANG Yu WANG Xinhui 2016ZTE Communications2016,14,B12:1
20Recent progress in perovskite solar cells:from device to commercialization显示文摘Perovskite solar cells(PSCs) are undergoing rapid development and the power conversion efficiency reaches 25.7% which attracts increasing attention on their commercialization recently.In this review,we summarized the recent progress of PSCs based on device structures,perovskite-based tandem cells,large-area modules,stability,applications and industrialization.Last,the challenges and perspectives are discussed,aiming at providing a thrust for the commercialization of PSCs in the near future.Xinhui Luo Xuesong Lin Feng Gao Yang Zhao Xiaodong Li Liqing Zhan Zexiong Qiu Jin Wang Cong Chen Lei Meng Xiaofeng Gao Yu Zhang Zijian Huang Rundong Fan Huifen Liu Yanrun Chen Xiaoxue Ren Jiahong Tang Chun-Hao Chen Dong Yang Yongguang Tu Xiao Liu Dongxue Liu Qing Zhao Jingbi You Junfeng Fang Yongzhen Wu Hongwei Han Xiaodan Zhang Dewei Zhao Fuzhi Huang Huanping Zhou Yongbo Yuan Qi Chen Zhaokui Wang Shengzhong(Frank)Liu Rui Zhu Jotaro Nakazaki Yongfang Li Liyuan Han 2022Science China Chemistry2022,65,12:1
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