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120篇 您的检索式:作者名="Jiang Yufeng"
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1Synergistic effect of fluorination on both donor and acceptor materials for high performance non-fullerene polymer solar cells with 13.5% efficiency显示文摘A high performance polymer solar cells(PSCs) based on polymer donor PM6 containing fluorinated thienyl benzodithiophene unit and n-type organic semiconductor acceptor IT-4 F containing fluorinated end-groups were developed. In addition to complementary absorption spectra(300–830 nm) with IT-4 F, the PM6 also has a deep HOMO(the highest occupied molecular) level(-5.50 e V), which will lower the open-circuit voltage(V_(oc)) sacrifice and reduce the E_(loss) of the IT-4 F-based PSCs. Moreover, the strong crystallinity of PM6 is beneficial to form favorable blend morphology and hence to suppress recombination. As a result, in comparison with the PSCs based on a non-fluorinated D/A pair of PBDB-T:ITIC with a medium PCE of 11.2%, the PM6:IT-4 Fbased PSCs yielded an impressive PCE of 13.5% due to the synergistic effect of fluorination on both donor and acceptor, which is among the highest values recorded in the literatures for PSCs to date. Furthermore, a PCE of 12.2% was remained with the active layer thickness of up to 285 nm and a high PCE of 11.4% was also obtained with a large device area of 1 cm^2. In addition, the devices also showed good storage, thermal and illumination stabilities with respect to the efficiency. These results indicate that fluorination is an effective strategy to improve the photovoltaic performance of materials, as well as the both fluorinated donor and acceptor pair-PM6:IT-4 F is an ideal candidate for the large scale roll-to-roll production of efficient PSCs in the future.Qunping Fan Wenyan Su Yan Wang Bing Guo Yufeng Jiang Xia Guo Feng Liu Thomas P.Russell Maojie Zhang Yongfang Li 2018Science China Chemistry2018,61,5:18
2Consensus on the application of negative pressure wound therapy of diabetic foot wounds显示文摘Because China is becoming an aging society,the incidence of diabetes and diabetic foot have been increasing.Diabetic foot has become one of the main health-related killers due to its high disability and mortality rates.Negative pressure wound therapy(NPWT)is one of the most effective techniques for the treatment of diabetic foot wounds and great progress,both in terms of research and its clinical application,has been made in the last 20 years of its development.However,due to the complex pathogenesis and management of diabetic foot,irregular application of NPWT often leads to complications,such as infection,bleeding and necrosis,that seriously affect its treatment outcomes.In 2020,under the leadership of Burns,Trauma and Tissue Repair Committee of the Cross-Straits Medicine Exchange Association,the writing group for‘Consensus on the application of negative pressure wound therapy of diabetic foot wounds’was established with the participation of scholars from the specialized areas of burns,endocrinology,vascular surgery,orthopedics and wound repair.Drawing on evidence-based practice suggested by the latest clinical research,this consensus proposes the best clinical practice guidelines for the application and prognostic evaluation of NPWT for diabetic foot.The consensus aims to support the formation of standardized treatment schemes that clinicians can refer to when treating cases of diabetic foot.Shizhao Ji Xiaobin Liu Jie Huang Junmin Bao Zhaohong Chen Chunmao Han Daifeng Hao Jingsong Hong Dahai Hu Yufeng Jiang Shang Ju Hongye Li Zongyu Li Guangping Liang Yan Liu Gaoxing Luo Guozhong Lv Xingwu Ran Zhongmin Shi Juyu Tang Aiping Wang Guangyi Wang Jiangning Wang Xin Wang Bing Wen Jun Wu Hailin Xu Maojin Xu Xiaofei Ye Liangxi Yuan Yi Zhang Shichu Xiao Zhaofan Xia 2021Burns & Trauma2021,9,1:17
3Sesquiterpene glycosides from the roots of Codonopsis pilosula显示文摘Three new sesquiterpene glycosides,named codonopsesquilosides A C(1 3),were isolated from an aqueous extract of the dried roots of Codonopsis pilosula.Their structures including absolute configurations were determined by spectroscopic and chemical methods.These glycosides are categorized as C_(15) carotenoid(1),gymnomitrane(2),and eudesmane(3)types of sesquiterpenoids,respectively.Compound 1 is the first diglycoside of C_(15) carotenoids to be reported.Compound 2 represents the second reported example of gymnomitrane-type sesquiterpenoids from higher plants.The absolute configurations were supported by comparison of the experimental circular dichroism(CD)spectra with the calculated electronic CD(ECD)spectra of 13,their aglycones,and model compounds based on quantummechanical time-dependent density functional theory.The influences of the glycosyls on the calculated ECD spectra of the glycosidic sesquiterpenoids,as well as some nomenclature and descriptive problems with gymnomitrane-type sesquiterpenoids are discussed.Yueping Jiang Yufeng Liu Qinglan Guo Chengbo Xu Chenggen Zhu Jiangong Shi 2016Acta Pharmaceutica Sinica B2016,6,1:16
4Acetylenes and fatty acids from Codonopsis pilosula显示文摘Four new acetylenes(1–4) and one new unsaturated ω-hydroxy fatty acid(5),together with 5known analogues,were isolated from an aqueous extract of Codonopsis pilosula roots.Their structures were determined by spectroscopic and chemical methods.The new acetylenes are categorized as an unusual cyclotetradecatrienynone(1),tetradecenynetriol(2),and rare octenynoic acids(3 and 4),respectively,and 3 and 4 are possibly derived from oxidative metabolic degradation of 1 and/or 2.The absolute configuration of 1 was assigned by comparison of the experimental circular dichroism(CD)spectrum with the calculated electronic circular dichroism(ECD) spectra of stereoisomers based on the quantum-mechanical time-dependent density functional theory,while the configuration of 2 was assigned by using modified Mosher's method based on the MPA determination rule of ΔδRSvalues for diols.Yueping Jiang Yufeng Liu Qinglan Guo Zhibo Jiang Chengbo Xu Chenggen Zhu Yongchun Yang Sheng Lin Jiangong Shi 2015Acta Pharmaceutica Sinica B2015,5,3:15
5Indole alkaloid sulfonic acids from an aqueous extract of Isatis indigotica roots and their antiviral activity显示文摘Six new indole alkaloid sulfonic acids(1–6), together with two analogues(7 and 8) that were previously reported as synthetic products, were isolated from an aqueous extract of the Isatis indigotica root. Their structures including the absolute configurations were determined by spectroscopic data analysis, combined with enzyme hydrolysis and comparison of experimental circular dichroism and calculated electronic circular dichroism spectra. In the preliminary assay, compounds 2 and 4 showed antiviral activity against Coxsackie virus B3 and influenza virus A/Hanfang/359/95(H3N2), respectively.Lingjie Meng Qinglan Guo Yufeng Liu Minghua Chen Yuhuan Li Jiandong Jiang Jiangong Shi 2017Acta Pharmaceutica Sinica B2017,7,3:14
6Clinical characteristics and effectiveness of antiviral agents in hospitalized children with infectious mononucleosis in China:A multicenter retrospective study显示文摘Importance:The clinical characteristics of infectious mononucleosis(IM)in Chinese children have not been evaluated in multicenter studies,and the effectiveness of antiviral treatment are controversial.Objective:To investigate the clinical characteristics of Chinese children with IM and current status of antiviral therapy for affected patients.Methods:Hospitalized patients with IM were enrolled between 2018 and 2020 in five children’s hospitals in China.The clinical characteristics were compared among four age groups:<3 years,3-<6 years,6-<10 years,and≥10 years.The clinical characteristics of IM and effectiveness of antiviral therapy were compared among patients receiving acyclovir(ACV),ganciclovir(GCV),and no antiviral therapy(i.e.,non-antiviral group).Results:In total,499 patients were analyzed;most patients were 3-<6 years of age.The most common symptoms and signs included fever(100%),lymphadenopathy(98.6%),pharyngitis(86.4%),eyelid edema(76.8%),and snoring(72.9%).There were significant differences in rash,hepatomegaly,and liver dysfunction among the four age groups.Patients aged<3 years had a lower incidence of liver dysfunction and a higher incidence of rash.Among the 499 patients,50.1%were treated with GCV,26.3%were treated with ACV,and 23.6%received no antiviral therapy.Compared with the non-antiviral group,patients in the ACV and GCV groups had longer durations of fever(P<0.001).There were no significant differences in the incidences of complications among the three treatment groups.Interpretation:The incidence of IM in Chinese children peaked at 3-<6 years of age.Clinical features of IM varied according to age.Patients receiving antiviral therapy exhibited more serious clinical manifestations than did patients without antiviral therapy.The effectiveness of antiviral therapy for IM requires further analysis.Huili Hu Huiling Deng Jing Bi Yi Xu Shuangjie Li Yue Xie Xinrong Sun Dongmeng Wang Xufang Li Wenxian Ouyang Bing Hu Yufeng Zhang He Tang Chunxiao Fang Hui Zhang Lingyun Guo Chen Wang Tianyi Wang Fengxia Yang Tao Jiang Zhengde Xie Gang Liu 2021Pediatric Investigation2021,5,3:12
7Personalized Real-Time Movie Recommendation System:Practical Prototype and Evaluation显示文摘With the eruption of big data,practical recommendation schemes are now very important in various fields,including e-commerce,social networks,and a number of web-based services.Nowadays,there exist many personalized movie recommendation schemes utilizing publicly available movie datasets(e.g.,MovieLens and Netflix),and returning improved performance metrics(e.g.,Root-Mean-Square Error(RMSE)).However,two fundamental issues faced by movie recommendation systems are still neglected:first,scalability,and second,practical usage feedback and verification based on real implementation.In particular,Collaborative Filtering(CF)is one of the major prevailing techniques for implementing recommendation systems.However,traditional CF schemes suffer from a time complexity problem,which makes them bad candidates for real-world recommendation systems.In this paper,we address these two issues.Firstly,a simple but high-efficient recommendation algorithm is proposed,which exploits users1 profile attributes to partition them into several clusters.For each cluster,a virtual opinion leader is conceived to represent the whole cluster,such that the dimension of the original useritem matrix can be significantly reduced,then a Weighted Slope One-VU method is designed and applied to the virtual opinion leader-item matrix to obtain the recommendation results.Compared to traditional clusteringbased CF recommendation schemes,our method can significantly reduce the time complexity,while achieving comparable recommendation performance.Furthermore,we have constructed a real personalized web-based movie recommendation system,MovieWatch,opened it to the public,collected user feedback on recommendations,and evaluated the feasibility and accuracy of our system based on this real-world data.Jiang Zhang Yufeng Wang Zhiyuan Yuan Qun Jin 2020Tsinghua Science and Technology2020,25,2:10
8Three-dimensional-printed individualized porous implants:A new“implant-bone”interface fusion concept for large bone defect treatment显示文摘Bone defect repairs are based on bone graft fusion or replacement.Current large bone defect treatments are inadequate and lack of reliable technology.Therefore,we aimed to investigate a simple technique using three-dimensional(3D)-printed individualized porous implants without any bone grafts,osteoinductive agents,or surface biofunctionalization to treat large bone defects,and systematically study its long-term therapeutic effects and osseointegration characteristics.Twenty-six patients with large bone defects caused by tumor,infection,or trauma received treatment with individualized porous implants;among them,three typical cases underwent a detailed study.Additionally,a large segmental femur defect sheep model was used to study the osseointegration characteristics.Immediate and long-term biomechanical stability was achieved,and the animal study revealed that the bone grew into the pores with gradual remodeling,resulting in a long-term mechanically stable implant-bone complex.Advantages of 3D-printed microporous implants for the repair of bone defects included 1)that the stabilization devices were immediately designed and constructed to achieve early postoperative mobility,and 2)that osseointegration between the host bone and implants was achieved without bone grafting.Our osseointegration method,in which the“implant-bone”interface fusion concept was used instead of“bone-bone”fusion,subverts the traditional idea of osseointegration.Teng Zhang Qingguang Wei Hua Zhou Zehao Jing Xiaoguang Liu Yufeng Zheng Hong Cai Feng Wei Liang Jiang Miao Yu Yan Cheng Daoyang Fan Wenhao Zhou Xinhong Lin Huijie Leng Jian Li Xinyu Li Caimei Wang Yun Tian Zhongjun Liu 2021Bioactive Materials2021,6,11:9
9Aromatic compounds from an aqueous extract of “ban lan gen” and their antiviral activities显示文摘A pair of new diphenyl glycerol ether enantiomers(-)-l and(+)-l and two new methyl benzamidobenzoates 2 and 3,named(-)-(R)-and(+)-(S)-isatindigotrioic acid[(-)-l and(+)-l]and isatindigoticamides A(2) and B(3),respectively,were isolated from an aqueous decoction of the roots of Isatis indigotica(ban lan gen).Their structures were elucidated by spectroscopic data analysis including2 D NMR experiments.The absolute configurations of(-)-l and(+)-l were assigned based on the CD exciton chirality method.Compounds 2 and 3 exhibited antiviral activities against HSV-1 with IC_(50)values of 4.87 and 25.87μmol/L,respectively.Compound 2 was also found active against Coxsackie virus B3 and LPS-induced NO production.Yufeng Liu Minghua Chen Qinglan Guo Yuhuan Li Jiandong Jiang Jiangong Shi 2017Acta Pharmaceutica Sinica B2017,7,2:8
10Niobium pentoxide:a promising surface-enhanced Raman scattering active semiconductor substrate显示文摘Surface-enhanced Raman scattering technique,as a powerful tool to identify the molecular species,has been severely restricted to the noble metals.The surface-enhanced Raman scattering substrates based on semiconductors would overcome the shortcomings of metal substrates and promote development of surface-enhanced Raman scattering technique in surface science,spectroscopy,and biomedicine studies.However,the detection sensitivity and enhancement effects of semiconductor substrates are suffering from their weak activities.In this work,a semiconductor based on Nb_(2)O_(5) is reported as a new candidate for highly sensitive surfaceenhanced Raman scattering detection of dye molecules.The largest enhancement factor value greater than 107 was observed with the laser excitation at 633 and 780 nm for methylene blue detection.As far as literature review shows,this is in the rank of the highest sensitivity among semiconductor materials;even comparable to the metal nanostructure substrates with“hot spots”.The impressive surface-enhanced Raman scattering activities can be attributed to the chemical enhancement dominated by the photoinduced charge transfer,as well as the electromagnetic enhancement,which have been supported by the density-functional-theory and finite element method calculation results.The chemisorption of dye on Nb_(2)O_(5) creates a new highest occupied molecular orbital and lowest unoccupied molecular orbital contributed by both fragments in the molecule-Nb_(2)O_(5) system,which makes the charge transfer more feasible with longer excitation wavelength.In addition,the electromagnetic enhancement mechanism also accounts for two orders of magnitude enhancement in the overall enhancement factor value.This work has revealed Nb_(2)O_(5) nanoparticles as a new semiconductor surface-enhanced Raman scattering substrate that is able to replace noble metals and shows great potentials applied in the fields of biology related.Yufeng Shan Zhihui Zheng Jianjun Liu Yong Yang Zhiyuan Li Zhengren Huang Dongliang Jiang 2017npj Computational Materials2017,,1:7
11Toxic effects of arsenic trioxide on Echinococcus granulosus protoscoleces through ROS production, and Ca^2+-ER stress-dependent apoptosis显示文摘Jiajie Li Guangyao Tang Wenjuan Qin Rentan Yang Rongji Ma Bin Ma Jianfeng Wei Hailong Lv Yufeng Jiang 2018Acta Biochimica et Biophysica Sinica2018,50,6:6
12CD147 antibody specifically and effectively inhibits infection and cytokine storm of SARS-CoV-2 and its variants delta,alpha,beta,and gamma显示文摘SARS-CoV-2 mutations contribute to increased viral transmissibility and immune escape,compromising the effectiveness of existing vaccines and neutralizing antibodies.An in-depth investigation on COVID-19 pathogenesis is urgently needed to develop a strategy against SARS-CoV-2 variants.Here,we identified CD147 as a universal receptor for SARS-CoV-2 and its variants.Meanwhile,Meplazeumab,a humanized anti-CD147 antibody,could block cellular entry of SARS-CoV-2 and its variants-alpha,beta,gamma,and delta,with inhibition rates of 68.7,75.7,52.1,52.1,and 62.3%at 60μg/ml,respectively.Furthermore,humanized CD147 transgenic mice were susceptible to SARS-CoV-2 and its two variants,alpha and beta.When infected,these mice developed exudative alveolar pneumonia,featured by immune responses involving alveoli-infiltrated macrophages,neutrophils,and lymphocytes and activation of IL-17 signaling pathway.Mechanistically,we proposed that severe COVID-19-related cytokine storm is induced by a'spike protein-CD147-CyPA signaling axis':Infection of SARS-CoV-2 through CD147 initiated the JAK-STAT pathway,which further induced expression of cyclophilin A(CyPA);CyPA reciprocally bound to CD147 and triggered MAPK pathway.Consequently,the MAPK pathway regulated the expression of cytokines and chemokines,which promoted the development of cytokine storm.Importantly,Meplazumab could effectively inhibit viral entry and inflammation caused by SARS-CoV-2 and its variants.Therefore,our findings provided a new perspective for severe COVID-19-related pathogenesis.Furthermore,the validated universal receptor for SARS-CoV-2 and its variants can be targeted for COVID-19 treatment.Jiejie Geng Liang Chen Yufeng Yuan Ke Wang Youchun Wang Chuan Qin Guizhen Wu Ruo Chen Zheng Zhang Ding Wei Peng Du Jun Zhang Peng Lin Kui Zhang Yongqiang Deng Ke Xu Jiangning Liu Xiuxuan Sun Ting Guo Xu Yang Jiao Wu Jianli Jiang Ling Li Kun Zhang Zhe Wang Jing Zhang Qingguo Yan Hua Zhu Zhaohui Zheng Jinlin Miao Xianghui Fu Fengfan Yang Xiaochun Chen Hao Tang Yang Zhang Ying Shi Yumeng Zhu Zhuo Pei Fei Huo Xue Liang Yatao Wang Qingyi Wang Wen Xie Yirong Li Mingyan Shi Huijie Bian Ping Zhu Zhi-Nan Chen 2021Signal Transduction and Targeted Therapy2021,6,10:6
13Expert consensus on early childhood caries management显示文摘Early childhood caries(ECC)is a significant chronic disease of childhood and a rising public health burden worldwide.ECC may cause a higher risk of new caries lesions in both primary and permanent dentition,affecting lifelong oral health.The occurrence of ECC has been closely related to the core microbiome change in the oral cavity,which may be influenced by diet habits,oral health management,fluoride use,and dental manipulations.So,it is essential to improve parental oral health and awareness of health care,to establish a dental home at the early stage of childhood,and make an individualized caries management plan.Dental interventions according to the minimally invasive concept should be carried out to treat dental caries.This expert consensus mainly discusses the etiology of ECC,caries-risk assessment of children,prevention and treatment plan of ECC,aiming to achieve lifelong oral health.Jing Zou Qin Du Lihong Ge Jun Wang Xiaojing Wang Yuqing Li Guangtai Song Wei Zhao Xu Chen Beizhan Jiang Yufeng Mei Yang Huang Shuli Deng Hongmei Zhang Yanhong Li Xuedong Zhou 2022International Journal of Oral Science2022,14,3:5
14Microelectronics-embedded channel bridging and signal regeneration of injured spinal cords显示文摘Due to the dificulty in spinal cord regeneration with biological methods,the microelectronic neural bridge,a new concept based on microelectronic technology,is presented.The microelectronic system has been realized in the forms of hybrid and integrated circuits.The integrated circuits forneural signal detection,stimulation,and regeneration are realized in a CMOS process.In animal experiments with 100 toads,48 rats,and 3 rabbits,nerve signals have been successfully detected from spinal cords and sciatic nerves,and functional electrical stimulation has been carried out for spinal cords and sciatic nerves.When the microelectronic system is bridged between the controlling and stimulated nerve,the relevant motion of legs and nerve signal waveforms,which are stimulated by the evoked or spontaneous nerve signal through such a system,have been observed.Therefore,the feasibility of the presented method was demonstrated.Zhigong Wang Xiaosong Gu Xiaoying Lǔ Zhenglin Jiang Wenyuan Li Guangming Lǔ Yufeng Wang Xiaoyan Shen Xintai Zhao Huiling Wang Zhenyu Zhang Hongmei Shen Yang Wu Weixing Shen Jingyang Zhang Dong Chen Xiaoyi Mao Huaxiang Shen 2009Progress in Natural Science:Materials International2009,19,10:5
15Effects of trigonelline inhibition of the Nrf2 transcription factor M vitro on Echmococcus granulosus显示文摘Wenjuan Qin Dongfang Guan Rongji Ma Rentan Yang Guoqiang Xing Hongjuan Shi Guangyao Tang Jiajie Li Hailong Lv Yufeng Jiang 2017Acta Biochimica et Biophysica Sinica2017,49,8:4
16Effects of methylphenidate on resting-state brain activity in normal adults: an fMRI study显示文摘Methylphenidate (MPH) is one of the most commonly used stimulants for the treatment of attention deficit hyperactivity disorder (ADHD). Although several studies have evaluated the effects of MPH on human brain activation during specific cognitive tasks using functional magnetic resonance imaging (fMRI), few studies have focused on spontaneous brain activity. In the current study, we investigated the effect of MPH on the intra-regional synchronization of spontaneous brain activity during the resting state in 18 normal adult males. A handedness questionnaire and the Wechsler Adult Intelligence Scale were applied before medication, and a resting-state fMRI scan was obtained 1 h after medication (20 mg MPH or placebo, order counterbalanced between participants). We demonstrated that: (1) there were no significant differences in the performance of behavioral tasks between the MPH and placebo groups; (2) the left middle and superior temporal gyri had stronger MPH-related regional homogeneity (ReHo); and (3) the left lingual gyrus had weaker MPH-related ReHo. Our findings showed that the ReHo in some brain areas changes with MPH compared to placebo in normal adults, even though there are no behavioral differences. This method can be applied to patients with mental illness who may be treated with MPH, and be used to compare the difference between patients taking MPH and normal participants, to help reveal the mechanism of how MPH works.Yihong Zhu Bin Gao Jianming Hua Weibo Liu Yichao Deng Lijie Zhang Biao Jiang Yufeng Zang 2013Neuroscience Bulletin2013,29,1:4
17METTL5 stabilizes c-Myc by facilitating USP5 translation to reprogram glucose metabolism and promote hepatocellular carcinoma progression显示文摘Background:Hepatocellular carcinoma(HCC)is one of the most prevalent cancers in the world,with a high likelihood of metastasis and a dismal prognosis.The reprogramming of glucosemetabolism is critical in the development ofHCC.TheWarburg effect has recently been confirmed to occur in a variety of cancers,including HCC.However,little is known about the molecular biological mechanisms underlying the Warburg effect in HCC cells.In this study,we sought to better understand how methyltransferase 5,N6-adenosine(METTL5)controls the development of HCC and theWarburg effect.Methods:In the current study,quantitative real-time polymerase chain reaction and Western blotting were used to detect the expression of METTL5 in HCC tissues and cell lines.Several different cell models and animal models were established to determine the role of METTL5 in glucose metabolism reprogramming and the underlying molecularmechanism of HCC.Glutathione-S-transferase pulldown,coimmunoprecipitation,RNA sequencing,non-targeted metabolomics,polysome profiling,and luciferase reporter assays were performed to investigate the molecular mechanisms of METTL5 in HCC cells.Results:We discovered that METTL5 drove glucose metabolic reprogramming to promote the proliferation and metastasis of HCC.Mechanistically,upregulation of METTL5 promoted c-Myc stability and thus activated its downstream glycolytic genes lactate dehydrogenase A(LDHA),enolase 1(ENO1),triosephosphate isomerase 1(TPI1),solute carrier family 2 member 1(SLC2A1),and pyruvate kinase M2(PKM2).The c-Box and ubiquitin binding domain(UBA)regions of ubiquitin specific peptidase 5(USP5)binded to c-Myc protein and inhibited K48-linked polyubiquitination of c-Myc.Further study revealed that METTL5 controled the USP5 translation process,which in turn regulated the ubiquitination of c-Myc.Furthermore,we identified cAMP responsive element binding protein 1(CREB1)/P300 as a critical transcriptional regulator ofMETTL5 that promoted the transcription of METTL5 in HCC.In patient-derived tumor xenograft(PDX)models,adenovirus-mediated knockout of METTL5 had a good antitumor effect and prolonged the survival of PDX-bearing mice.Conclusions:These findings point to a novel mechanism by which CREB1/P300-METTL5-USP5-c-Myc controls abnormal glucose metabolism and promotes tumor growth,suggesting that METTL5 is a potential therapeutic target and prognostic biomarker for HCC.Peng Xia Hao Zhang Haofeng Lu Kequan Xu Xiang Jiang Yuke Jiang Xiangdong Gongye Zhang Chen Jie Liu Xi Chen Weijie Ma Zhonglin Zhang Yufeng Yuan 2023Cancer Communications2023,43,3:3
18Machine learning helps improve diagnostic ability of subclinical keratoconus using Scheimpflug and OCT imaging modalities显示文摘Purpose:To develop an automated classification system using a machine learning classifier to distinguish clinically unaffected eyes in patients with keratoconus from a normal control population based on a combination of Scheimpflug camera images and ultra-high-resolution optical coherence tomography(UHR-OCT)imaging data.Methods:A total of 121 eyes from 121 participants were classified by 2 cornea experts into 3 groups:normal(50 eyes),with keratoconus(38 eyes)or with subclinical keratoconus(33 eyes).All eyes were imaged with a Scheimpflug camera and UHR-OCT.Corneal morphological features were extracted from the imaging data.A neural network was used to train a model based on these features to distinguish the eyes with subclinical keratoconus from normal eyes.Fisher’s score was used to rank the differentiable power of each feature.The receiver operating characteristic(ROC)curves were calculated to obtain the area under the ROC curves(AUCs).Results:The developed classification model used to combine all features from the Scheimpflug camera and UHR-OCT dramatically improved the differentiable power to discriminate between normal eyes and eyes with subclinical keratoconus(AUC=0.93).The variation in the thickness profile within each individual in the corneal epithelium extracted from UHR-OCT imaging ranked the highest in differentiating eyes with subclinical keratoconus from normal eyes.Conclusion:The automated classification system using machine learning based on the combination of Scheimpflug camera data and UHR-OCT imaging data showed excellent performance in discriminating eyes with subclinical keratoconus from normal eyes.The epithelial features extracted from the OCT images were the most valuable in the discrimination process.This classification system has the potential to improve the differentiable power of subclinical keratoconus and the efficiency of keratoconus screening.Ce Shi Mengyi Wang Tiantian Zhu Ying Zhang Yufeng Ye Jun Jiang Sisi Chen Fan Lu Meixiao Shen 2020Eye and Vision2020,7,1:3
19Comparison of the water quality of the surface microlayer and subsurface water in the Guangzhou segment of the Pearl River, China显示文摘在表面 microlayer (SML ) 优秀的水和在广州的表面下的水(SSW ) 珀尔分割河,发育营养正常促进剂在中国的城市的河节,被分析。滋养的集中,重金属和细菌的空间、时间的动力学在整个 2010 在每月的样品从二个采样地点被检验。当全部的磷和 orthophosphate 分别地是 0.5 mg/L 和 0.1 mg/L 时,全部的氮,氨,硝酸盐和亚硝酸根的吝啬的集中比 7.0 mg/L, 3.1 mg/L, 1.1 mg/L 和 0.3 mg/L 高。这些结果显示水质量富于矿物质和发育营养正常促进剂。Mn 和 Fe 的吝啬的集中比 0.013 mg/L 高;并且 Ni, Cr 和 Pb 比 0.001 mg/L 高。吝啬的集中在 Mn 的顺序 > Fe > Ni > Pb > Cr。在广州片断的重金属的集中是比在中国和世界健康组织的表面水质量标准的限制低的() ,但是比在世界淡水的中部的价值高。细菌的密度从 3.30 潳瑵敨獡整湲瀠牡 ? 景琠敨猠畯桴牥 ? 楑杮慨 ?LIU Qing HU Xiaojuan JIANG Jiangluan ZHANG Junyi WU Zhihui YANG Yufeng 2014Journal of Geographical Sciences2014,24,3:3
20M0S2 dual-gate transistors with electrostatically doped contacts显示文摘Two-dimensional(2D)transition metal dichalcogenides(TMDs)such as molybdenum disulfide(M0S2)have been intensively investigated because of their exclusive physical properties for advaneed electronics and optoelectronics.In the present work,we study the M0S2 transistor based on a novel tri-gate device architecture,with dual-gate(Dual-G)in the channel and the buried side-gate(Side-G)for the source/drain regi ons.All gates can be in depe ndently con trolled without in terfere nee.For a MoS2 sheet with a thick ness of 3.6 nm,the Schottky barrier(SB)and non-overlapped channel region can be effectively tuned by electrostatically doping the source/drain regions with Side-G.Thus,the extri nsic resista nee can be effectively lowered,and a boost of the ON-state cur re nt can be achieved.Mean while,the cha nn el c ontrol remai ns efficient under the Dual-G mode,with an ON-OFF current ratio of 3 x 107 and subthreshold swing of 83 mV/decade.The corresponding band diagram is also discussed to illustrate the device operati on mechanism.This no vel device structure ope ns up a new way toward fabricati on of high-performance devices based on 2D-TMDs.Fuyou Liao Yaocheng Sheng Zhongxun Guo Hongwei Tang Yin Wang Lingyi Zong Xinyu Chen Antoine Riaud Jiahe Zhu Yufeng Xie Lin Chen Hao Zhu Qingqing Sun Peng Zhou Xiangwei Jiang Jing Wan Wenzhong Bao David Wei Zhang 2019Nano Research2019,12,10:2
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