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58篇 您的检索式:作者名="GUO SiYu"
    题名 作者 年代 出处 被引量
1Hanning self-convolution window and its application to harmonic analysis显示文摘The Hanning self-convolution window (HSCW) is proposed in this paper. And the phase difference correction algorithm based on the discrete spectrum and the HSCW is given. The HSCW has a low peak side lobe level, a high side lobe roll-off rate, and a simple spectrum representation. Hence, leakage errors and harmonic interferences can be considerably reduced by weighting samples with the HSCW, the parameter estimation by the HSCW-based phase difference correction algorithm is free of solving high order equations, and the overall method can be easily implemented in embedded systems. Simulation and application results show that the HSCW-based phase difference correction algorithm can suppress the impacts of fundamental frequency fluctuation and white noise on harmonic parameter estimation, and the HSCW is advantageous over existing combined cosine windows in terms of harmonic analysis performance.WEN He TENG ZhaoSheng GUO SiYu WANG JingXun YANG BuMing WANG Yi CHEN Tao 2009Science China(Technological Sciences)2009,52,2:15
2Multi-omics analyses of 398 foxtail millet accessions reveal genomic regions associated with domestication,metabolite traits,and antiinflammatory effects显示文摘Foxtail millet(Setaria italica),which was domesticatedfromthewild speciesgreenfoxtail(Setaria viridis),isa richsource of phytonutrientsfor humans.To evaluate how breeding changed themetabolome offoxtail millet grains,we generated and analyzed the datasets encompassing the genomes,transcriptomes,metabolomes,and anti-inflammatory indices from 398 foxtail millet accessions.We identified hundreds of common variants that influence numerous secondary metabolites.We observed tremendous differences in natural variations of the metabolites and their underlying genetic architectures between distinct sub-groups of foxtail millet.Furthermore,we found that the selection of the gene alleles associated with yellow grains led to altered profiles of metabolites such as carotenoids and endogenous phytohormones.Using CRiSPR-mediated genome editing wevalidated the function of PHYTOENE SYNTHASE1(PSY1)gene in affecting milletgrain colorand quality.Interestingly,our in vitro cell inflammation assays showed that 83 metabolites in millet grains have anti-inflammatory effects.Taken together,ourmulti-omics study illustrates how the breeding history of foxtail millet has shaped its metabolite profile.The datasets we generated in this study also provide important resources for further understanding how millet grain quality is affected by different metabolites,laying the foundations for future millet genetic research and metabolome-assisted improvement.Xukai Li Jianhua Gao Jingyi Song Kai Guo Siyu Hou Xingchun Wang Qiang He Yanyan Zhang Yakun Zhang Yulu Yang Jiaoyan Tang Hailang Wang Staffan Persson Mingquan Huang Lishuai Xu Linlin Zhong Dongqin Li Yongming Liu Hua Wu Xianmin Diao Peng Chen Xiaowen Wang Yuanhuai Han 2022Molecular Plant2022,15,8:8
3Static and dynamic finite element analysis of 304 stainless steel rod and wire hot continuous rolling process显示文摘Three-dimensional finite element models were developed to analyze 304 stainless steel rod and wire hot continuous rolling process with the help of MSC.Marc software.The entire 30-pass deformation process and the actual parameters of production line were taken into account.Static and dynamic procedures were used to study the continuous rolling process with the aid of the thermo-mechanical coupled FEM of elastic-plasticity.The properties of billets,such as deformation,temperature field and rolling force,were mainly discussed.The simulation results of temperature agree well with the measured values.Comparisons of the analy- sis results obtained using static implicit method and dynamic implicit method were presented.It is shown that static implicit proce- dure is more accurate than dynamic implicit procedure and is able to simulate the rolling process with a lower speed,such as a rough- ing mill.Whereas,dynamic analysis shows a higher efficiency than static analysis and is fit for simulating the rolling process with a higher speed,such as a finishing mill.Siyu Yuan Liwen Zhang Shulun Liao Mao Li Min Qi Yu Zhen Shuqi Guo 2008Journal of University of Science and Technology Beijing2008,15,3:5
4Effect of PdOx structure properties on catalytic performance of Pd/Ce0.67Zr0.33O2 catalyst for CO,HC and NOx elimination显示文摘Pd/Ce0.67Zr0.33O2 catalyst was pretreated in different atmosphere respectively, and characterized by CO chemical adsorption, XPS, HR-TEM, H2-TPR, Raman, OSC and in situ DRIFTS to investigate the effect of the structure properties of PdOx species on the catalytic performance for CO, HC and NOx elimination. The results show that Pd/CZ catalyst pretreated in air atmosphere has higher oxidation activity of HC due to having high Pd dispersion and strong interaction between PdOx and CZ support. Pd/CZ-H catalyst pretreated in reducing atmosphere exhibits better catalytic performance of NOx elimination because of having relatively big Pd particle size, more Pd species in metallic state and higher concentration of oxygen vacancies. While for the Pd/CZ-RG catalyst pretreated in reactant atmosphere, strong adsorption of HC species on the surface of catalysts would lead to a part of active sites being covered, which inhibits HC and NO conversions.Ting Wang Xiaolin Guo Siyu Lin Renxian Zhou 2019Journal of Rare Earths2019,37,7:4
5InStereo2K:a large real dataset for stereo matching in indoor scenes显示文摘Deep neural networks have shown great success in stereo matching in recent years.On the KITTI datasets,most top performing methods are based on neural networks.However,on the Middlebury datasets,these methods usually do not perform well.The KITTI datasets are collected in outdoor scenes while the Middlebury datasets are collected in indoor scenes.It is commonly believed that the community still lacks a large labelled dataset for stereo matching in indoor scenes.In this paper,we introduce a new stereo dataset called InS tereo2K.It contains 2050 pairs of stereo images with highly accurate groundtruth disparity maps,including 2000 pairs for training and 50 pairs for test.Experimental results show that our dataset can significantly improve the performance of several latest networks(including StereoNet and PSMNet)on the Middlebury 2014 dataset.The large scale,high accuracy and rich diversity of the proposed InS tereo2K dataset provide new opportunities to researchers in the area of stereo matching and beyond.It also takes end-to-end stereo matching methods a step towards practical applications.Wei BAO Wei WANG Yuhua XU Yulan GUO Siyu HONG Xiaohu ZHANG 2020Science China(Information Sciences)2020,63,11:4
6Does Fin tech Narrow the Gen der Wage Gap?Evidence from China显示文摘Information and communication technology promotes the rapid development of fintech,which has a far-reaching impact on wage distribution in China.Using data from the Chinese General Social Survey and the Index of Digital Financial Inclusion,this study examines the impact of fin tech on the gender wage gap.We find that fin tech(i)narrows the gender wage gap;(ii)reduces capital constraints and operating costs,thereby promoting female entrepreneurship,driving more women into employment,and enabling women to increase their wages and bargaining power within the household;and(iii)positively impacts the wages of women(and men)who have lower family economic status,and helps women(but not men)counter the risk of decline in wages caused by childbearing and caring under the two-child policy.These findings have important policy implications and provide evidence of women s improving economic conditions leading to a reduced gender wage gap.Qing Guo Siyu Chen Xiangquan Zeng 2021China & World Economy2021,29,4:3
7Identification of Graves’ophthalmology by laser-induced breakdown spectroscopy combined with machine learning method显示文摘Diagnosis of the Graves’ophthalmology remains a significant challenge.We identified between Graves’ophthalmology tissues and healthy controls by using laser-induced breakdown spectroscopy(LIBS)combined with machine learning method.In this work,the paraffin-embedded samples of the Graves’ophthalmology were prepared for LIBS spectra acquisition.The metallic elements(Na,K,Al,Ca),non-metallic element(O)and molecular bands((C-N),(C-O))were selected for diagnosing Graves’ophthalmology.The selected spectral lines were inputted into the supervised classification methods including linear discriminant analysis(LDA),support vector machine(SVM),k-nearest neighbor(ANN),and generalized regression neural network(GRNN),respectively.The results showed that the predicted accuracy rates of LDA,SVM,ANN,GRNN were 76.33%,96.28%,96.56%,and 96.33%,respectively.The sensitivity of four models were 75.89%,93.78%,96.78%,and 96.67%,respectively.The specificity of four models were 76.78%,98.78%,96.33%,and 96.00%,respectively.This demonstrated that LIBS assisted with a nonlinear model can be used to identify Graves’ophthalmopathy with a higher rate of accuracy.The ANN had the best performance by comparing the three nonlinear models.Therefore,LIBS combined with machine learning method can be an effective way to discriminate Graves’ophthalmology.Jingjing LI Feng CHEN Guangqian HUANG Siyu ZHANG Weiliang WANG Yun TANG Yanwu CHU Jian YAO Lianbo GUO Fagang JIANG 2021Frontiers of Optoelectronics2021,14,3:3
8Downregulation of ceramide synthase 1 promotes oral cancer through endoplasmic reticulum stress显示文摘C18 ceramide plays an important role in the occurrence and development of oral squamous cell carcinoma.However,the function of ceramide synthase 1,a key enzyme in C18 ceramide synthesis,in oral squamous cell carcinoma is still unclear.The aim of our study was to investigate the relationship between ceramide synthase 1 and oral cancer.In this study,we found that the expression of ceramide synthase 1 was downregulated in oral cancer tissues and cell lines.In a mouse oral squamous cell carcinoma model induced by 4-nitroquinolin-1-oxide,ceramide synthase 1 knockout was associated with the severity of oral malignant transformation.Immunohistochemical studies showed significant upregulation of PCNA,MMP2,MMP9,and BCL2 expression and downregulation of BAX expression in the pathological hyperplastic area.In addition,ceramide synthase 1 knockdown promoted cell proliferation,migration,and invasion in vitro.Overexpression of CERS1 obtained the opposite effect.Ceramide synthase 1 knockdown caused endoplasmic reticulum stress and induced the VEGFA upregulation.Activating transcription factor 4 is responsible for ceramide synthase 1 knockdown caused VEGFA transcriptional upregulation.In addition,mild endoplasmic reticulum stress caused by ceramide synthase 1 knockdown could induce cisplatin resistance.Taken together,our study suggests that ceramide synthase 1 is downregulated in oral cancer and promotes the aggressiveness of oral squamous cell carcinoma and chemotherapeutic drug resistance.Wen Chen Chenzhou Wu Yafei Chen Yuhao Guo Ling Qiu Zhe Liu Haibin Sun Siyu Chen Zijian An Zhuoyuan Zhang Yi Li Longjiang Li 2021International Journal of Oral Science2021,13,1:3
9Experimental drugs for treatment of autoimmune myocarditis显示文摘Han Lina Guo Shuli Wang Yutang Yang Liming Liu Siyu 2014Chinese Medical Journal2014,,15:2
10Na-doping-induced modification of the Cu_(2)ZnSn(S,Se)_(4)/CdS heterojunction towards efficient solar cells显示文摘It is very important to understand why a small amount of alkali metal doping in Cu_(2)ZnSn(S,Se)_(4)(CZTSSe)solar cells can improve the conversion efficiency.In this work,Na-doped CZTSSe is prepared by a simple solution method,and then the effects on the surface properties of the absorber layer,the buffer layer growth,and the modifications of the solar cell performance induced by the Na doping are studied.The surface of the absorber layer is more Cu-depletion and less roughness due to the Na doping.In addition,the contact angle of the surface increases because of Na doping.As a consequence,the thickness of the CdS buffer layer is significantly reduced and the optical losses in the CdS buffer layer are decreased.The difference of quasi-Fermi levels(EFn-EFp) increases with a small amount of Na doping in the CZTSSe solar cell,so that open circuit voltage(VOC) increased significantly.This work offers new insights into the effects of Na doping on CZTSSe via a solution-based approach and provides a deeper understanding of the origin of the efficiency improvement of Na-doped CZTSSe thin film solar cells.Yali Sun Hongling Guo Pengfei Qiu Shengli Zhang Siyu Wang Li Wu Jianping Ao Yi Zhang 2021Journal of Energy Chemistry2021,30,6:2
11Prospect of China's ambient air quality standards显示文摘Ambient air quality standards are the core strategic goal of ambient air quality management.Countries worldwide have given importance to research on the development of ambient air quality standards.To understand the history of the development of China’s ambient air quality standards,this study analyzed the background associated with all previous formulations and revisions of the standards,classification of functional areas,standard grading,pollutants,and evolution of the standard limits over the past 40 years.The results show that since the initial release of the“Ambient Air Quality Standard”by China in 1982,it has been supplemented once,revised twice,and modified twice.The first ambient air quality standard specified the standard limits of six pollutants commonly found in ambient air.With the development of ambient air quality management,the number of pollutants has increased to ten.Since the release of the“Ambient Air Quality Standards”in 2012,the ambient air quality in China has significantly improved.However,the proportion of cities meeting these standards is still low.At present,China is suitably positioned to make the standards associated with 24 hr SO2concentrations more stringent such that it meets the values defined in the World Health Organization(WHO)interim target-2 and the WHO air quality guideline(AQG).We further suggested that the SO2standard should be revised promptly.Simultaneously,regions with a relatively high proportion of cities meeting the standard are encouraged to introduce more stringent interim target limits in due course to manage the local ambient air quality.Zongshuang Wang Yufei Tan Min Guo Miaomiao Cheng Yanyue Gu Siyu Chen Xuefang Wu Fahe Chai 2023Journal of Environmental Sciences2023,,1:2
12Modeling and finite element analysis of rod and wire steel rolling process显示文摘Two thermomechanical coupled elastic-plastic finite element (FE) models were developed for predicting the 12-pass continuous rolling process of GCr15 rod and wire steel. The distances between stands in the proposed models were set according to the actual values, and the billets were shortened in the models to reduce the calculation time. To keep the continuity of simulation, a technique was developed to transfer temperature data between the meshes of different models in terms of nodal parameters by interpolation functions. The different process variables related to the rolling process, such as temperature, total equivalent plastic strain, equivalent plastic strain rate, and contact friction force, were analyzed. Also, the proposed models were applied to analyze the reason for the occurrence of an excessive spread in width. Meanwhile, it was also utilized to assess the influence of the roll diameter change on the simulated results such as temperature and rolling force. The simulated results of temperature are found to agree well with the measured results.Shulun Liao Liwen Zhang Siyu Yuan Yu Zhen Shuqi Guo 2008Journal of University of Science and Technology Beijing2008,15,4:2
13Towards carbon neutrality:A study on China's long-term low-carbon transition pathways and strategies显示文摘As the world's biggest carbon dioxide(CO_(2))emitter and the largest developing country,China faces daunting challenges to peak its emissions before 2030 and achieve carbon neutrality within 40 years.This study fully considered the carbon-neutrality goal and the temperature rise constraints required by the Paris Agreement,by developing six long-term development scenarios,and conducting a quantitative evaluation on the carbon emissions pathways,energy transformation,technology,policy and investment demand for each scenario.This study combined both bottom-up and top-down methodologies,including simulations and analyses of energy consumption of end-use and power sectors(bottom-up),as well as scenario analysis,investment demand and technology evaluation at the macro level(top-down).This study demonstrates that achieving carbon neutrality before 2060 translates to significant efforts and overwhelming challenges for China.To comply with the target,a high rate of an average annual reduction of CO_(2) emissions by 9.3%from 2030 to 2050 is a necessity,which requires a huge investment demand.For example,in the 1.5℃ scenario,an investment in energy infrastructure alone equivalent to 2.6%of that year's GDP will be necessary.The technological pathway towards carbon neutrality will rely highly on both conventional emission reduction technologies and breakthrough technologies.China needs to balance a long-term development strategy of lower greenhouse gas emissions that meets both the Paris Agreement and the long-term goals for domestic economic and social development,with a phased implementation for both its five-year and long-term plans.Jiankun He Zheng Li Xiliang Zhang Hailin Wang Wenjuan Dong Ershun Du Shiyan Chang Xunmin Ou Siyue Guo Zhiyu Tian Alun Gu Fei Teng Bin Hu Xiu Yang Siyuan Chen Mingtao Yao Zhiyi Yuan Li Zhou Xiaofan Zhao Ying Li Danwei Zhang 2022Environmental Science and Ecotechnology2022,,1:2
14Triangular self-convolution window with desirable sidelobe behaviors for harmonic analysis of Power system显示文摘WEN He TENG Zhaosheng GUO Siyu 2010IEEE Transactions on Instrumentation and Measurement2010,59,3:1
15An improved Hough transform voting scheme utilizing surround suppression 显示文摘Guo Siyu Pridmore Tony Kong Yaguang 2009Pattern Recognition letters2009,30,13:1
16Clustering-based probability distribution model for monthly residential building electricity consumption analysis显示文摘Electricity is now the major form of energy used in residential buildings and has seen a significant increase in usage over the past decades.One of the main features of electricity use in residential buildings is the diversity of total electricity consumption and use patterns among households.Current models may not be able to simulate and generate electricity use curves or reflect the variations accurately.To fill this gap,this research simulates electricity use curves in residential buildings with a clustering-based probability distribution model.The model extracts feature parameters to represent the electricity use level and patterns and then conducts a two-step cluster analysis to identify the distinctions of both electricity use levels and patterns.Based on the clustering results,probability distributions are fitted for all feature parameters within each sub-cluster.The model is then validated with three validation approaches.Monthly electricity consumption in households of the Jiangsu Province,China,was studied to test the performance of the model.Lastly,this paper discusses the application of this model under different spatial resolutions and analyzes the temporal-relevant model features.Jieyan Xu Xuyuan Kang Zheng Chen Da Yan Siyue Guo Yuan Jin Tianyi Hao Rongda Jia 2021Building Simulation2021,14,1:1
17Dynamic changes of renal cortical blood perfusion before and after percutaneous transluminal renal artery stenting in patients with severe atherosclerotic renal artery stenosis显示文摘Background:This study aims to observe the dynamic changes of renal artery(RA)disease and cortical blood perfusion(CBP)evaluated by contrast-enhanced ultrasound(CEUS)after percutaneous transluminal renal artery stenting(PTRAS)in patients with severe atherosclerotic renal artery stenosis(ARAS)and to analyze the relationship between CBP and prognosis.Methods:This was a single-center retrospective cohort study.A total of 98 patients with unilateral severe ARAS after successful PTRAS in Beijing Hospital from September 2017 to September 2020 were included.According to renal glomerular filtration rate(GFR)detected by radionuclide imaging at 12 months after PTRAS,all patients were divided into the poor prognosis group(n=21,GFR decreased by≥20%compared with baseline)and the control group(n=77,GFR decreased by<20%or improved compared with baseline).Renal artery stenosis was diagnosed by digital subtraction angiography,and renal CBP was evaluated by CEUS using TomTec Imaging Systems(Germany)before PTRAS,at 6 months and 12 months after discharge.The receiver operating characteristic(ROC)curve with area under the curve(AUC)was used to analyze the predictive value of CBP parameters,including area under ascending curve(AUC1),area under the descending curve(AUC2),rising time(RT),time to peak intensity(TTP),maximum intensity(IMAX),and mean transit time(MTT)for poor prognosis.Results:Among the 98 patients,there were 52 males(53.1%),aged 55–74 years old,with an average age of 62.1±8.7 years,and an average artery stenosis of 82.3±12.9%.The poor prognosis group was associated with significantly increased incidence of diabetes(76.2%vs.41.6%),and lower levels of GFR of the stenotic kidney(21.8 mL/min vs.25.0 mL/min)and total GFR(57.6 mL/min vs.63.7 mL/min)(all P<0.05),compared with the control group(P<0.05).In addition,the rate of RA restenosis was significantly higher in the poor prognosis group than in the control group(9.5%vs.0,χ^(2)=9.462,P=0.002).Compared with the control group,the poor prognosis group was associated with significantly decreased baseline AUC1 and AUC2,and extended duration of TTP and MTT(P<0.05).At 6 months and 12 months of follow-up,patients in the control group were associated with markedly increased AUC1,AUC2,and IMAX,and shorter duration of RT and MTT(P<0.05).The ROC curve showed that the predictive values of AUC1,AUC2,RT,TTP,IMAX,and MTT for poor prognosis were 0.812(95%CI:0.698–0.945),0.752(95%CI:0.591–0.957),0.724(95%CI:0.569–0.961),0.720(95%CI:0.522–0.993),0.693(95%CI:0.507–0.947),and 0.786(95%CI:0.631–0.979),respectively.Conclusions:Preoperative renal CBP in severe ARAS patients with poor prognosis is significantly reduced,and does not show significant improvement after stent treatment over the first year of follow-up.The parameter AUC1 may be a good predictor for renal dysfunction after PTRAS in severe ARAS patients.Trial Registration:ChiCTR.org.cn,ChiCTR1800016252.Na Ma Yan Li Siyu Wang Mengpu Li Yongjun Li Hu Ai Hui Zhu Yang Wang Fajin Guo Junhong Ren 2022Chinese Medical Journal2022,,13:1
18Harmonic Phasor Analysis Based on Improved FFT Algorithm显示文摘Bo Zeng Zhaosheng Teng Yulian Cai Siyu Guo Baiyuan Qing 2011IEEE Transactions on Smart Grid2011,2,1:1
19Covariance intersection based image fusion technique with application to pansharpening in remote sensing显示文摘Qing Guo Siyue Chen Henry Leung Shutian Liu 2010Information Sciences2010,,18:1
20Quantum dots-hydrogel composites for biomedical applications显示文摘Quantum dots-hydrogel composites are promising new materials that have attracted extensive attention due to their incomparable biocompatibility and acceptable biodegradability, leading to enormous potential applications for various fields. This review summarizes the recent advances in quantum dots-hydrogel composites with a focus on synthesis methods, including hydrogel gelation in quantum dots(QDs) solution, embedding prepared QDs into hydrogels after gelation, forming QDs in situ within the preformed gel and cross-linking via QDs to form hydrogels. In particularly, biomedical applications as bioimaging,biosensing and drug delivery are also reviewed, followed by a discussion on the inherent challenges of design optimization, biocompatibility and bimodal applications and the prospect of the future development. These results will guide the development of quantum dots-hydrogel composites and provide critical insights to inspire researchers in future.Wenjie Zhou Zhe Hu Jinxin Wei Hanqing Dai Yuanyuan Chen Siyu Liu Zhongtao Duan Fengxian Xie Wanlu Zhang Ruiqian Guo 2022Chinese Chemical Letters2022,33,3:1
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