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| 1 | Observation and analysis of near-surface atmospheric aerosol optical properties in urban Beijing显示文摘Year-round measurements of the mass concentration and optical properties of fine aerosols(PM_(2.5)) from June 2009 to May 2010 at an urban site in Beijing were analyzed.The annual mean values of the PM_(2.5) mass concentration,absorption coefficient(Ab),scattering coefficient(Sc) and single scattering albedo(SSA)at 525 nm were 67±66μg/m^3,64 ±62 Mm^(-1),360 ±405 Mm^(-1) and 0.82 ±0.09,respectively.The bulk mass absorption efficiency and scattering efficiency of the PM_(2.5) at 525 nm were 0.78 m^2/g and 5.55 m^2/g,respectively.The Ab and Sc showed a similar diurnal variation with a maximum at night and a minimum in the afternoon,whereas SSA displayed an opposite diurnal pattern.Significant increases in the Ab and Sc were observed in pollution episodes caused by the accumulation of pollutants from both local and regional sources under unfavorable weather conditions.Aerosol loadings in dust events increased by several times in the spring,which had limited effects on the Ab and Sc due to the low absorption and scattering efficiency of dust particles.The frequency of haze days was the highest in autumn because of the high aerosol absorption and scattering under unfavorable weather conditions.The daily PM_(2.5)concentration should be controlled to a level lower than 64 μg/m^3 to prevent the occurrence of haze days according to its exponentially decreased relationship with visibility. | Junshan Jing Yunfei Wu Jun Tao Huizheng Che Xiangao Xia Xiaochun Zhang Peng Yan Deming Zhao Leiming Zhang | 2015 | Particuology2015，13，1： | 16 |
| 2 | JAK-STAT signaling mediates the senescence of bone marrow-mesenchymal stem cells from systemic lupus erythematosus patients显示文摘以前的研究揭示了那根骨头从病人们早展出了的全身的豺狼座 erythematosus (SLE ) 的髓间充质的干细胞(BM-MSCs ) 老朽签名,它可以参予 SLE 的发展。然而,关于这现象的分子的机制充分没被阐明。在当前的学习,我们试图调查表明发信号的抄写(STAT ) 的变换器和使活跃之物的 Janus kinase (JAK ) 是否调停了从 SLE 病人的 BM-MSCs 的老朽。12 个女 SLE 病人和健康题目在学习被注册。所有 BM-MSCs 被密度坡度 centrifugation 孤立。西方的污点分析被用来测试表明分子的 JAK-STAT 的表示。我们由流动 cytometry 观察了房间,由染色的 F 肌动朊的细胞骨架结构的变化,和房间周期的分发的女郎的活动。从 SLE 病人的 BM-MSCs 显示出表明 transduction, phosphorylated JAK2 的高水平,和 STAT3 的 JAK-STAT 的老朽,和反常激活的突出的特征。在在正常 MSC 的 IFN- 的刺激以后,发信号的 JAK-STAT 被激活。房间体积和联系老朽的牛乳糖的数字(SA -- 女郎) 在 SLE BM-MSCs 积极被增加。细胞骨架的组织是将近混乱的。房间增长的率被减少。AG490, JAK2 的禁止者,并且在 BM-MSCs 的 STAT3 击倒,能显著地颠倒老朽。在摘要,我们的学习显示 JAK-STAT 发信号小径可以在 SLE BM-MSCs 的老朽起一个关键作用。 | Juan Ji Yeqing Wu Yan Meng Lijuan Zhang Guijuan Feng Yunfei Xia Wenrong Xue Shuyang Zhao Zhifeng Gu Xiaoyi Shao | 2017 | Acta Biochimica et Biophysica Sinica2017，49，3： | 8 |
| 3 | Recent advances in emerging techniques for non-destructive detection of seed viability: A review显示文摘Over the past decades,imaging and spectroscopy techniques have been developed rapidly with widespread applications in non-destructive agro-food quality determination.Seeds are one of themost fundamental elements of agriculture and forestry.Seed viability is of great significance in seed quality characteristics reflecting potential seed germination,and there is a great need for a quick and effective method to determine the germination condition and viability of seeds prior to cultivate,sale and plant.Some researches based on spectra and/or image processing and analysis have been explored in terms of the external and internal quality of a variety of seeds.Many attempts have been made in image segmentation and spectra correction methods to predict seed quality using various traditional and novel methods.This review focuses on the comparative introduction,development and applications of emerging techniques in the analysis of seed viability,in particular,near infrared spectroscopy,hyperspectral and multispectral imaging,Raman spectroscopy,infrared thermography,and soft X-ray imaging methods.The basic theories,principle components,relative chemometric processing,analytical methods and prediction accuracies are reported and compared.Additionally,on the foundation of the observed applications,the technical challenges and future outlook for these emerging techniques are also discussed. | Yu Xia Yunfei Xu Jiangbo Li Chi Zhang Shuxiang Fan | 2019 | Artificial Intelligence in Agriculture2019，，1： | 7 |
| 4 | Target delineation and dose prescription of adaptive replanning intensity-modulated radiotherapy for nasopharyngeal carcinoma显示文摘Dear Editor,Intensity-modulated radiotherapy(IMRT)has a distinct advantage of high conformity and is an appropriate tech-nique for treating nasopharyngeal carcinoma(NPC).Pre-vious studies have demonstrated that anatomical changes in the external contour,shape,and location of the target and critical structures are significant and result in dosi-metric changes[1,2].Patients’quality of life and clini-cal outcomes might be improved by IMRT replanning[3].Therefore,replanning strategies should be consid-ered instead of single-planning strategies throughout the entire course of radiotherapy.However,there are sub-stantial controversies on(1)the appropriate time for tar-get redelineation,(2)how to modify the target volumes,and(3)how to evaluate the modified plans.The present study provides a new perspective in replanning with regard to these three aspects. | Dehuan Xie Wanqin Cheng Shaowen Lv Rui Zhong Lei Wang Jiang Hu Mingli Wang Shaomin Huang Yong Su Yunfei Xia | 2019 | Cancer Communications2019，39，1： | 7 |
| 5 | Quantitative Remote Sensing Study on Regional Soil Erosion——Bin County of Heilongjiang as an Example显示文摘Based on Chinese soil loss equation (CSLE) model, this paper utilized technical advantages of RS and geographic information system (GIS) on data access and erosion factors data-base building to study prediction methods of regional soil erosion. The spatial analysis module of ARCGIS platform was applied to study the spatial distribution of erosion and the inter-relations of the factors influencing regional soil erosion in the research area. As a result, the mean soil erosion modulus of Bin County is 3 555.42 t/(km2?a), which suggests moderate degree erosion. The mean soil erosion modulus of clayey meadow soil is higher than those of dark brown soil and black soil. Vegetation factor values are between 0.1-0.2. The mean slope gradient and slope length values are respectively 1.335 and 6.061 which shows slope length is a dominant factor. And soil type, vegetation coverage and to-pographic factors have remarkable relevance to each other. There-fore, RS, GIS and CSLE are applicable in regional scale to disclose spatial distribution characteristics of soil erosion and to analyze the characteristics of dominant soil erosion factor quantitatively. | XU Xia MIAO Chiyuan LIAO Yunfei | 2008 | Wuhan University Journal of Natural Sciences2008，13，3： | 5 |
| 6 | Revalidation of a prognostic score model based on complete blood count for nasopharyngeal carcinoma through a prospective study显示文摘Objective: In our previous work, we incorporated complete blood count(CBC) into TNM stage to develop a new prognostic score model, which was validated to improve prediction efficiency of TNM stage for nasopharyngeal carcinoma(NPC).The purpose of this study was to revalidate the accuracy of the model, and its superiority to TNM stage, through data from a prospective study.Methods: CBC of 249 eligible patients from the 863 Program No.2006AA02Z4B4 was evaluated.Prognostic index(PI) of each patient was calculated according to the score model.Then they were divided by the PI into three categories: the low-, intermediate-and high-risk patients.The 5-year disease-specific survival(DSS) of the three categories was compared by a log-rank test.The model and TNM stage(7th edition) were compared on efficiency for predicting the 5-year DSS, through comparison of the area under curve(AUC) of their receiver-operating characteristic curves.Results: The 5-year DSS of the low-, intermediate- and high-risk patients were 96.0%, 79.1% and 62.2%,respectively.The low- and intermediate-risk patients had better DSS than the high-risk patients(P<0.001 and P<0.005, respectively).And there was a trend of better DSS in the low-risk patients, compared with the intermediate-risk patients(P=0.049).The AUC of the model was larger than that of TNM stage(0.726 vs.0.661,P=0.023).Conclusions: A CBC-based prognostic score model was revalidated to be accurate and superior to TNM stage on predicting 5-year DSS of NPC. | Xiaohui Li Hui Chang Yalan Tao Xiaohui Wang Jin Gao Wenwen Zhang Chen Chen Yunfei Xia | 2016 | Chinese Journal of Cancer Research2016，28，5： | 4 |
| 7 | Recent advances in high-loading catalysts for low-temperature fuel cells: From nanoparticle to single atom显示文摘Low-temperature fuel cells(LTFCs)are considered to be one of the most promising power sources for widespread application in sustainable and renew-able energy conversion technologies.Although remarkable advances have been made in the mass activity of catalysts,mass transport impedance needs to be urgently addressed at a well-designed membrane electrode assembly(MEA)scale.Increasing the loading of electrocatalysts is conducive to prepare thinner and more efficient MEAs owing to the resulting enhanced reactant permeability,better proton diffusion,and lower electrical resistance.Herein,recent progress in high-loading(≥40 wt.%)Pt nanoparticle catalysts(NPCs)and high-loading(≥2 wt.%)single-atom catalysts(SACs)for LTFC applications are reviewed.A summary of various synthetic approaches and support materials for high-loading Pt NPCs and SACs is systematically presented.The influences of high surface area and appropriate surface functionalization for Pt NPCs,as well as coordina-tion environment,spatial confinement effect,and strong metal-support interac-tions(SMSI)for SACs are highlighted.Additionally,this review presents some ideas regarding challenges and future opportunities of high-loading catalysts in the application of LTFCs. | Lixiao Shen Miao Ma Fengdi Tu Zigang Zhao Yunfei Xia Kokswee Goh Lei Zhao Zhenbo Wang Guangjie Shao | 2021 | SusMat2021，1，4： | 3 |
| 8 | Anti-wear beam effects on gas-solid hydrodynamics in a circulating fluidized bed显示文摘Anti-wear beams installed on water walls of circulating fluidized bed(CFB) boilers are one of the most effective ways to protect against water-wall erosion.Beam effects from,for example,beam size and superficial gas velocity were investigated on gas-solid hydrodynamics in a CFB test rig using CFD simulations and experimental methods.The downward flow of the wall layer solids is observed to be disrupted by the beam but is then restored some distance further downstream.When falling solids from the wall layer hit the anti-wear beam,the velocity of the falling solids decreases rapidly.A fraction of the solids accumulates on the beam.Below the beams,the falling solids have reduced velocities but upward-moving solids were observed on the wall.The effect of the beam increases with width and superficial gas velocity.Wear occurs mainly above the beam and its variation with width is different above to below the beam.There is an optimum width that,when combined with beam height,results in less erosion. | Yunfei Xia Leming Cheng Chunjiang Yu Linjie Xu Qinhui Wang Mengxiang Fang | 2015 | Particuology2015，13，2： | 3 |
| 9 | miR-203 induces oxaliplatin resistance in colorectal cancer cells by negatively regulating ATM kinase显示文摘 | Yunfei Zhou Guohui Wan Riccardo Spizzo Cristina Ivan Rohit Mathur Xiaoxiao Hu Xiangcang Ye Jia Lu Fan Fan Ling Xia George A. Calin Lee M. Ellis Xiongbin Lu | 2014 | Molecular Oncology2014，，1： | 3 |
| 10 | Wuacanthus(Acanthaceae),a new Chinese endemic genus segregated from Justicia(Acanthaceae)显示文摘A new genus,Wuacanthus Y.F.Deng,N.H.Xia&H.Peng(Acanthaceae),is described from the Hengduan Mountains,China.Wuacanthus is based on Wuacanthus microdontus(W.W.Sm.)Y.F.Deng,N.H.Xia&H.Peng,originally published in Justicia and then moved to Mananthes.The new genus is characterized by its shrub habit,strongly 2-lipped corolla,the 2-lobed upper lip,3-lobed lower lip,2 stamens,bithecous anthers,parallel thecae with two spurs at the base,2 ovules in each locule,and the 4-seeded capsule.Phylogenetic analyses show that the new genus belongs to the Pseuderanthemum lineage in tribe Justicieae.Wuacanthus is closely related to Pseuderanthemum but differs from the latter by its shorter corolla tube and two minute spurs at the base of each anther-theca.W.microdontus is assessed with the status EN B2ab(iii)based on the IUCN Red List Categories and Criteria. | Yunfei Deng Chunming Gao Nianhe Xia Hua Peng | 2016 | Plant Diversity2016，38，6： | 3 |
| 11 | Predicting the grades of Astragali radix using mass spectrometrybased metabolomics and machine learning显示文摘Astragali radix(AR,the dried root of Astragalus)is a popular herbal remedy in both China and the United States.The commercially available AR is commonly classified into premium graded(PG)and ungraded(UG)ones only according to the appearance.To uncover novel sensitive and specific markers for AR grading,we took the integrated mass spectrometry-based untargeted and targeted metabolomics approaches to characterize chemical features of PG and UG samples in a discovery set(n=16 batches).A series of five differential compounds were screened out by univariate statistical analysis,including arginine,calycosin,ononin,formononetin,and astragalosideⅣ,most of which were observed to be accumulated in PG samples except for astragalosideⅣ.Then,we performed machine learning on the quantification data of five compounds and constructed a logistic regression prediction model.Finally,the external validation in an independent validation set of AR(n=20 batches)verified that the five compounds,as well as the model,had strong capability to distinguish the two grades of AR,with the prediction accuracy>90%.Our findings present a panel of meaningful candidate markers that would significantly catalyze the innovation in AR grading. | Xinyue Yu Jingxue Nai Huimin Guo Xuping Yang Xiaoying Deng Xia Yuan Yunfei Hua Yuan Tian Fengguo Xu Zunjian Zhang Yin Huang | 2021 | Journal of Pharmaceutical Analysis2021，11，5： | 2 |
| 12 | Carbonized wood with ordered channels decorated by NiCo_(2)O_(4) for lightweight and high-performance microwave absorber显示文摘Wood-derived carbon has a 3D porous framework composed of through channels along the growth direction,which is a suitable matrix for preparing electromagnetic wave(EMW)absorbing materials with low cost,light weight,and environmental friendliness.Herein,the carbonized wood decorated by short cone-like NiCo_(2)O_(4)(NiCo_(2)O_(4)@CW)with highly ordered straight-channel architecture was successfully manufactured through a facile calcination procedure.The horizontal arrangement of the through channels of NiCo_(2)O_(4)@CW(H-NiCo_(2)O_(4)@CW)exhibits a strong reflection loss value of-64.0 dB at 10.72 GHz with a thickness of 3.62 mm and a low filling ratio of 26 wt%(with the density of 0.98 g-cnf3),and the effective absorption bandwidth(EAB)is 8.08 GHz(9.92-18.0 GHz)at the thickness of 3.2 mm.The excellent microwave absorption(MA)property was ascribed to the ordered-channel structure with abundant interfaces and defects from NiCo_(2)O_(4)@CW,which could promote the interfacial polarization and dipole polarization.What is more,this advantageous structure increased the multiple reflections and scattering.Finite element analysis(FEA)simulation is carried out to detect the interaction between the prepared material and EMW when the ordered channels are arranged in different directions.This research provides a low-cost,sustainable,and environmentally friendly strategy for using carbonized wood to fabricate microwave absorbers with strong attenuation capabilities and light weight. | Guangyu QIN Xiaoxiao HUANG Xu YAN Yunfei HE Yuhao LIU Long XIA Bo ZHONG | 2022 | Journal of Advanced Ceramics2022，11，1： | 2 |
| 13 | Characteristic absorption peak of the human blood measured with differential photoacoustic spectroscopy显示文摘A new highly sensitive spectroscopy technique-differential photoacoustic spectroscopy (PAS) is presented in this paper. The blood samples from 3 healthy persons, patients with leukemia, patients with pregnancy-induced hypertension (PIH), and 40 patients with nasopharyngeal carcinoma were measured by the PAS technique. The normalized, the first order, and the second order differential photo-acoustic spectroscopy of the blood were gained. The results show that ( i) weak absorption peaks or shoulder peaks, which could not be found using conventional photoacoustic spectroscopy, were determined by the first order and the second order differential photoacoustic spectroscopy which significantly improve the sensitivity of detection; and (ii) that two characteristic absorption peaks were found at the wavelength of 637 and 664 nm in all persons’ blood samples by the differential photoacoustic spectroscopy technique. This experiment concludes that the differential photoacoustic spectroscopy technique is superior | TANG Zhilie LIU Jinlong XIA Yunfei SU Yong LIANG Luisheng CHEN Gengsheng | 2002 | Chinese Science Bulletin2002，47，24： | 2 |
| 14 | Optimal control problem in an epidemic disease SIS model with stages and delays显示文摘 | Yongzhen Pei Miaomiao Chen Xiyin Liang Zhumei Xia Yunfei Lv Changguo Li | 2016 | International Journal of Biomathematics2016，9，5： | 2 |
| 15 | Management Algorithm for Prevention of Mother-to-child Transmission of Hepatitis B Virus(2022)显示文摘The World Health Organization(WHO)has set the goal of eliminating hepatitis as a threat to public health by 2030.Blocking mother-to-child transmission(MTCT)of hepatitis B virus(HBV)is not only the key to eliminating viral hepatitis,but also a hot issue in the field of hepatitis B prevention and treatment.To standardize the clinical management of preventing MTCT of HBV and achieve zero HBV infection among infants,the Chinese Foundation for Hepatitis Prevention and Control organized experts to compile a management algorithm for prevention of MTCT of HBV based on the latest research progress and guidelines,including 10 steps of pregnancy management and postpartum follow-up,among which screening,antiviral treatment,and infant immunization are its core components. | Zhihua Liu Zhongdan Chen Fuqiang Cui Yang Ding Yunfei Gao Guorong Han Jidong Jia Jie Li Zengde Li Yingxia Liu Qing Mao Ailing Wang Wei Wang Lai Wei Jianhong Xia Qing Xie Xizhong Yang Xueru Yin Hua Zhang Liaoyun Zhang Wenhong Zhang Hui Zhuang Xiaoguang Dou Jinlin Hou | 2022 | Journal of Clinical and Translational Hepatology2022，10，5： | 2 |
| 16 | Void fraction for random loose packing of the cylindrical particles considering filling rate,material and shape显示文摘Particle packing is widely applied in organic pollutant adsorption,catalytic reaction.biomass combustion,nuclear cooling,and other scenarios.Due to the complexity of the shape,the studies on the void fraction of the cylindrical particles are not as thorough as the spherical particles.This study investigated the influence of the flling rate,material properties and sphericity on the void fraction of cylinders through experiments and simulation.DEM(discrete element method)was validated by the internal structures of the packing obtained by CT(computed tomography).Based on the logarithmic correlation between the void fraction and flling rate,an ingenious framework for predicting the void fraction of cylindrical particles was presented with two intermediate coefficients.By correlating the coefficients with the material property and sphericity,a novel void-fraction prediction model was established with R-squared of 0.996.The mechanism of void fraction under random loose packing for cylinders was eventually found in this study. | Chengquan Zhang Jun Gao Yukun Xu Yunfei Xia Xiaobin Wei Xing Su Lingjie Zeng | 2022 | Particuology2022，20，4： | 1 |
| 17 | Effect of radial heat conduction on effective thermal conductivity of carbon nanotube bundles显示文摘The effect of the radial heat conduction on the effective thermal conductivity of carbon nanotube(CNT) bundles is studied by the nonequilibrium molecular dynamics(NEMD) method. The hexagonal CNT bundle consists of seven(10, 10) single-walled carbon nanotubes(SWCNTs). The radial heat conduction is induced by creating the vacancy defects in some segments of the constituent CNTs. Combined with the temperature differences and the inter-tube thermal resistances at the different segments,the radial heat flow in the CNT bundle is calculated. The maximum percentage of the radial heat flow is less than 7% with the presence of four defective CNTs, while the resultant decrement of the effective thermal conductivity of the bundle is about 18%.The present results indicate that the radial heat flow can significantly diminish the axial heat conduction in the CNT bundles,which probably explains the smaller effective thermal conductivity in the CNT assemblies compared to that of the individual CNTs. | WANG JianLi SONG YaMei ZHANG YuFeng HU YuHan YIN Hang GU YunFeng XIA Re CHEN YunFei | 2018 | Science China(Technological Sciences)2018，61，12： | 1 |
| 18 | Improving Chinese Word Representation with Conceptual Semantics显示文摘The meaning of a word includes a conceptual meaning and a distributive meaning.Word embedding based on distribution suffers from insufficient conceptual semantic representation caused by data sparsity,especially for low-frequency words.In knowledge bases,manually annotated semantic knowledge is stable and the essential attributes of words are accurately denoted.In this paper,we propose a Conceptual Semantics Enhanced Word Representation(CEWR)model,computing the synset embedding and hypernym embedding of Chinese words based on the Tongyici Cilin thesaurus,and aggregating it with distributed word representation to have both distributed information and the conceptual meaning encoded in the representation of words.We evaluate the CEWR model on two tasks:word similarity computation and short text classification.The Spearman correlation between model results and human judgement are improved to 64.71%,81.84%,and 85.16%on Wordsim297,MC30,and RG65,respectively.Moreover,CEWR improves the F1 score by 3%in the short text classification task.The experimental results show that CEWR can represent words in a more informative approach than distributed word embedding.This proves that conceptual semantics,especially hypernymous information,is a good complement to distributed word representation. | Tingxin Wei Weiguang Qu Junsheng Zhou Yunfei Long Yanhui Gu Zhentao Xia | 2020 | Computers, Materials & Continua2020，，9： | 1 |
| 19 | Impact of diabetes mellitus on treatment outcomes in patients with nasopharyngeal cancer 显示文摘 | Hui Liu Yunfei Xia Nianji Cui | 2006 | Med Oncol2006，23，3： | 1 |
| 20 | 1093例鼻咽癌疗效和预后分析:21世纪初广州单个中心的经验(英文)显示文摘Objective: To analyze the treatment results of primary nasopharyngeal carcinoma (NPC) treated in our institu-tion in the beginning of the 21st century to identify key failures and late effects for refining future treatments. Methods: 1093 patients with primary NPC treated during December 2001 and June 2003 were retrospectively analyzed. The distribution ac-cording to the AJCC/UICC (2002 edition) staging system was stage I in 5.8%, stage II 40.2%, stage III 32.7% and stage IVa-b 21.3%. Four different ERT techniques were used: fluoroscopy simulation conventional radiotherapy (CR) in 74.3% of patients, computer tomography simulation conventional radiotherapy (CT-sim CR) 14.2%, three-dimensional conformal radiotherapy (3D-CRT) 6.3%, intensity modulated radiotherapy (IMRT) 5.2%. In the whole series, 46.7% of patients had additional treat-ment with chemotherapy. Results: The 4-year local failure-free rate (LFFR), nodal failure-free rate, distant metastasis-free rate, progression-free survival and overall survival (OS) was 89.6%, 96.1%, 85.9%, 73.0% and 82.4%, respectively. The stage was the most important prognostic factor. The 4-year OS and LFFR of patients treated by CR, CT-sim CR, 3D-CRT and IMRT was 80.2%, 89.8%, 89.8%, 92.4% and 87.7%, 96.4%, 91.0%, 96.5%, respectively. The morbidity and degree of xerostomia and trismus were lower in the patients treated by 3D-CRT and IMRT than by CR and CT-sim CR. Conclusion: Treatment results of primary NPC in our institution have been substantially improved. Distant metastasis is the main failure. The CT simulation and conformal radiotherapy can enhance the OS and LFFR, and conformal radiotherapy can reduce the morbidity and degree of late effects. | Xiaoqing Liu Wei Luo Mengzhong Liu Ling Ye Ying Sun Yunfei Xia | 2008 | The Chinese-German Journal of Clinical Oncology2008，7，4： | 1 |
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