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| 1 | Temporal and spatial variations of the active layer along the Qinghai-Tibet Highway in a permafrost region显示文摘Using monitored active layer thickness(ALT) and environmental variables of 10 observation fields along the Qinghai-Tibet Highway in permafrost region of the Qinghai-Tibetan Plateau(QTP),a model for ALT estimation was developed.The temporal and spatial characteristics of the ALT were also analyzed.The results showed that in the past 30 years ALT in the study region increased at a rate of 1.33 cm a-1.Temperatures at the upper limit of permafrost and at 50 cm depth,along with soil cumulative temperature at 5 cm depth also exhibited a rising trend.Soil heat flux increased at a rate of 0.1 Wm-2 a-1.All the above changes demonstrated that the degradation of permafrost happened in the study region on the QTP.The initial thawing date of active layer was advanced,while the initial freezing date was delayed.The number of thawing days increased to a rate of 1.18 da-1.The variations of active layer were closely related to the permafrost type,altitude,underlying surface type and soil composition.The variations were more evident in cold permafrost region than in warm permafrost region,in high-altitude region than in low-altitude region,in alpine meadow region than in alpine steppe region;and in fine-grained soil region than in coarse-grained soil region. | LI Ren ZHAO Lin DING YongJian WU TongHua XIAO Yao DU ErJi LIU GuangYue QIAO YongPing | 2012 | Chinese Science Bulletin2012，57，35： | 51 |
| 2 | Measures against the adverse impact of natural wind on air-cooled condensers in power plant显示文摘The natural wind plays disadvantageous roles in the operation of air-cooled steam condensers in power plant.It is of use to take various measures against the adverse effect of wind for the performance improvement of air-cooled condensers.Based on representative 2×600 MW direct air-cooled power plant,three ways that can arrange and optimize the flow field of cooling air thus enhance the heat transfer of air-cooled condensers were proposed.The physical and mathematical models of air-cooled condensers with various flow leading measures were presented and the flow and temperature fields of cooling air were obtained by CFD simulation.The back pressures of turbine were calculated for different measures on the basis of the heat transfer model of air-cooled condensers.The results show that the performance of air-cooled condensers is improved thus the back pressure of turbine is lowered to some extent by taking measures against the adverse impact of natural wind. | YANG LiJun,DU XiaoZe & YANG YongPing Key Laboratory of Condition Monitoring and Control for Power Plant Equipment of Ministry of Education of China,North China Electric Power University,Beijing 102206,China | 2010 | Science China(Technological Sciences)2010，53，5： | 21 |
| 3 | Research Progress in the Application of Chinese Herbal Medicines in Aquaculture: A Review显示文摘 | Hongyu Pu Xiaoyu Li Qingbo Du Hao Cui Yongping Xu | 2017 | Engineering2017，3，5： | 17 |
| 4 | Thermo-flow characteristics and air flow field leading of the air-cooled condenser cell in a power plant显示文摘Special A-frame geometry of the air-cooled condenser cell and the complicated flow field at the exit of the axial flow fan bring on the air mal-distribution on the surface of the finned tube bundles and the deteriorated thermo-flow performances of a condenser cell.It is of benefit to the design and operation optimization of the direct dry cooling system in a power plant to investigate the thermo-flow characteristics of the condenser cell and propose the flow leading measures of cooling air.On the basis of the representative configuration of the air-cooled condenser cell in a 600 MW direct dry cooling power plant,the computational models of the air side fluid and heat flows are built,in which the actual fan blade geometric details are considered.Various flow field leading ways of cooling air are presented and the thermo-flow characteristics in the A-frame condenser cell and through the finned tube bundles are compared.Results show that the flow field leading measures can result in the increased volumetric flow rate and heat rejection,thus bringing on the improved performance of the condenser cell.The improvement of thermo-flow performances depends upon the geometric details of the flow guiding device. | ZHANG WanXi YANG LiJun DU XiaoZe YANG YongPing | 2011 | Science China(Technological Sciences)2011，54，9： | 8 |
| 5 | Numerical investigation on the cluster effect of an array of axial flow fans for air-cooled condensers in a power plant显示文摘The aerodynamic behavior of tens of axial flow fans incorporated with air-cooled condensers in a power plant is different from that of an individual fan.Investigation of the aerodynamic characteristics of axial flow fan array benefits its design optimization and running regulation.Based on a representative 2600 MW direct-dry cooling power plant,the flow rate of each fan and the overall flow rate of the fan array are obtained in the absence of ambient wind and at various wind speeds and directions,using CFD simulation.The cluster factor of each fan and the average cluster factor of the fan array are calculated and analyzed.Results show that the cluster factors are different from each other and that the cluster effect with ambient wind is significantly different from the cluster effect with no wind.The fan at the periphery of the array or upwind of the ambient wind generally has a small cluster factor.The average cluster factor of the array decreases with the increasing wind speeds and also varies widely with wind direction.The cluster effect of the axial flow fan array can be applied to optimize the design and operation of air-cooled condensers in a power plant. | YANG LiJun DU XiaoZe ZHANG Hui YANG YongPing | 2011 | Chinese Science Bulletin2011，56，21： | 6 |
| 6 | Improve the Collaborative Filtering Recommender System Performance by Trust Network Construction显示文摘Data sparseness brings significant challenges to the research of recommender systems. It becomes more severe for neighborhood-based collaborative filtering.We introduce the trust relation computing of the sociology field. Instead of the traditional similarity computing method, the trust degree is integrated for the nearest neighbor selection. The trust network is constructed by the expansion of different path length, and the trust value between the users can be obtained by the trust transmission rules. To verify the effectiveness of our method, we give the experiments on different techniques for rating prediction,including Pearson based method, the User position similarity(UPS) based method and the trust with Pearson and UPS. We also give the t-test result. The implementation of the experiment on the Epinions data set shows that the proposed method can improve the system performance significantly. | DU Yongping DU Xiaoyan HUANG Liang | 2016 | Chinese Journal of Electronics2016，25，3： | 6 |
| 7 | Analysis on contact and flow features in CMP process显示文摘Contact pressure and flow features of chemical mechanical polishing/planarization (CMP) process were analyzed,taking advantage of the one-dimensional contact model of two layers and considering slurry flows. In this model,deformations of the bulk pad substrate and the asperities were considered. The deformations of the bulk pad sub- strate and the asperity layer,as well as the contact pressure and fluid pressure,were revealed with nu- merical methods. Numerical simulation results show a counterintuitive phenomenon: a diverging clear- ance is formed in the leading region of the wafer and thereby it gives rise to a suction pressure (subambi- ent pressure). A high stress concentration is pre- sented at the wafer edge and thereby over polishing can be introduced. The research provides some theoretical explanations for these two fundamental features of usual CMP processes. | ZHANG Chaohui LUO Jianbin LIU Jinquan DU Yongping | 2006 | Chinese Science Bulletin2006，51，18： | 5 |
| 8 | Study on heat transfer enhancement of discontinuous short wave finned flat tube显示文摘The typical configuration adopted by air-cooled condenser(ACC) in coal-fired power generating unit is the wave finned flat tube. The development of boundary layer between wave fins along long axis of flat tube can suppress the air-side heat transfer enhancement to a great extent. It has been proved that the serrated fins can enhance heat transfer obviously by breaking the development of boundary layer periodically. In the present study,the discontinuous short wave fin was introduced to the flat tube to enhance the air-side heat transfer of ACC. Two different types of arrangements,i.e. staggered and in-line for discontinuous short wave fins on the flat tube,were designed. By numerical simulation,the heat transfer and flow performances of short wave fins were studied under different arrangements(in-line,staggered) ,and the influences on heat transfer and flow characteristics of rows of short wave fin and interrupted distance between discontinuous short wave fins were revealed numerically. The results indicated that,compared with the original continuous wave fin,the discontinuous short wave fin effectively improved the air-side heat transfer of flat tube under the air flow velocities in the practical application of engineering. Moreover,the increment of pressure loss of air-side flow was restricted for the discontinuous short wave fins because of the reduction of contact areas between the air flow and fin surface. | FENG LiLi DU XlaoZe YANG YongPing YANG LiJun | 2011 | Science China(Technological Sciences)2011，54，12： | 4 |
| 9 | Effect of slope inclination on step friction coefficient of human being显示文摘Effect of slope inclination on step friction coefficient of human being was studied by gait friction tester developed by Henan University of Science and Technology.It is beneficial to improving the safety of human beings while walking on a ramp.Based on the trajectory of mass center of body(MCOB)and the mechanical analysis of human body while walking,conclusion could be drawn that the required step frictional coefficient(RSFC)exhibited an'M'shaped curve during the foot contacting with the ground and got its maximum and minimum values when MCOB of the subject was at the highest and lowest position respectively.Moreover,the first peak of RSFC decreases firstly and then increases,while the second peak of RSFC increases with the increase of slope inclination at the experimental condition.The position of pivotal point is decided by the relative size of slope inclination and the angle between the plumb line through MCOB and the line from foot to MCOB. | ZHANG YongZhen JIA LiXiao PANG XianJuan NIU YongPing DU SanMing | 2013 | Science China(Technological Sciences)2013，56，12： | 3 |
| 10 | Protective effects of catalpol and rhein in murine experimental autoimmune encephalomyelitis via regulation of T helper (Th)1, Th2,Th17, and regulatory T cell responses显示文摘OBJECTIVE:To examine the effects of catalpol and rhein on pro-and anti-inflammatory responses in C57 BL/6 mice with experimental autoimmune encephalomyelitis(EAE),a model of multiple sclerosis.METHODS:Female C57 BL/6 mice were randomly divided into four groups(n=30):(a)normal salinecontrol,(b)EAE control,(c)EAE+prednisone acetate(PA,6 mg/kg),and(d)EAE+catalpol(40 mg/kg)and rhein(5 mg/kg).EAE was induced by injection of myelin oligodendrocyte glycoprotein 35-55 plus pertussis toxin.Treatments were orally administered daily for 40 d.Disease progression and neurological function were assessed using a semi-quantitative scale of tail and limb paralysis.Brains and spinal cords were collected on Days 6,20,and 40 and assessed for histopathological changes by hematoxylin and eosin staining.Production of interleukin(IL)-2,IL-4,IL-10,and IL-17 A protein was measured by enzyme-linked immunosorbent assay.Expression of the T helper(Th)1-,Th2-,Th17-,and regulatory T cell(Treg)-specific transcription factors T-bet,GATA3,ROR-γt,and Foxp3,respectively,were analyzed by quantitative reverse-transcription polymerase chain reaction and western blot analysis.RESULTS:Combination treatment with catalpol and rhein significantly alleviated the clinical disability and neurological dysfunction of mice with EAE.Catalpol and rhein treatment also reduced the infiltration of pro-inflammatory T cells into pathological lesions;significantly increased the expression of the anti-inflammatory factors GATA3,Foxp3,IL-4,and IL-10;and significantly decreased the expression of the pro-inflammatory factors T-bet,ROR-γt,IL-2,and IL-17 A.CONCLUSION:Catalpol and rhein reduced the neurological disabilities of mice with EAE,at least in part by rebalancing the pro-and anti-inflammatory environment in the brains and spinal cords. | Wei Mingyan Yang Tao Li Qian Zhou Dongdong Du Zongpan Fan Yongping | 2019 | Journal of Traditional Chinese Medicine2019，39，6： | 3 |
| 11 | Genome-wide identification and characterization of the lateral organ boundaries domain gene family in Brassica rapa var.rapa显示文摘The Lateral Organ Boundaries Domain(LBD)genes encode highly conserved plant-specific LOB domain proteins which regulate growth and development in various species.However,members of the LBD gene family have yet to be identified in Brassica rapa var.rapa.In the present study,fifty-nine LBD genes were identified and distributed on 10 chromosomes.The BrrLBD proteins are predicted to encode hydrophobic polypeptides between 118 and 394 amino acids in length and with molecular weights ranging from 13.31 to 44.24 kDa;the theoretical pi for these proteins varies from 4.83 to 9.68.There were 17 paralogous gene pairs in the BrrLBD family,suggesting that the amplification of the BrrLBD gene family involved largescale gene duplication events.Members of the BrrLBD family were divided into 7 subclades(class I a to e,class II a and b).Analysis of gene structure and conserved domains revealed that most BrrLBD genes of the same subclade had similar gene structures and protein motifs.The expression profiles of 59 BrrLBD genes were determined through Quantitative Real-time fluorescent PCR(qRT-PCR).Most BrrLBD genes in the same subclade had similar gene expression profiles.However,the expression patterns of 7 genes differed from their duplicates,indicating that although the gene function of most BrrLBD genes has been conserved,some BrrLBD genes may have undergone evolutionary change. | Qin Yu Simin Hu Jiancan Du Yongping Yang Xudong Sun | 2020 | Plant Diversity2020，42，1： | 3 |
| 12 | A review of concentrated photovoltaic-thermal(CPVT) hybrid solar systems with waste heat recovery(WHR)显示文摘In conventional photovoltaic(PV) systems, a large portion of solar energy is dissipated as waste heat since the generating efficiency is usually less than 30%. As the dissipated heat can be recovered for various applications, the wasted heat recovery concentrator PV/thermal(WHR CPVT) hybrid systems have been developed. They can provide both electricity and usable heat by combining thermal systems with concentrator PV(CPV) module, which dramatically improves the overall conversion efficiency of solar energy.This paper systematically and comprehensively reviews the research and development of WHR CPVT systems. WHR CPVT systems with innovative design configurations, different theoretical evaluation models and experimental test processes for several implementations are presented in an integrated manner. We aim to provide a global point of view on the research trends, market potential, technical obstacles, and the future work which is required in the development of WHR CPVT technology. Possibly, it will offer a generic guide to the investigators who are interested in the study of WHR CPVT systems. | Xing Ju Chao Xu Zhirong Liao Xiaoze Du Gaosheng Wei Zhifeng Wang Yongping Yang | 2017 | Science Bulletin2017，62，20： | 3 |
| 13 | All in one theranostic nanoplatform enables efficient anti-tumor peptide I delivery for triple-modal imaging guided cancer therapy显示文摘Developing a reliable system to efficiently and safely deliver peptide drugs into tumor tissues still remains a great challenge since the instability of peptide drugs and low ability to traverse the cell membrane. Herein, we constructed a multifunctional nanoplatform based on porous europium/gadolinium (Eu/Gd)-doped NaLa(MoO4)2 nanoparticles (NLM NPs) to deliver antitumor peptide of B-cell lymphoma/leukemia-2-like protein 11 (BIM) for cancer therapy. The porous NLM NPs exhibited inherent photoluminescent, magnetic and X-ray absorbable properties, which enable them for triple-modal bioimaging, including fluorescence, magnetic resonance imaging (MRI) and computed tomography (CT). This triple-modal bioimaging can contribute to monitoring NLM NPs biodistribution and guiding therapy in vitro and in vivo. Furthermore, the NLM NPs showed negligible cytotoxicity in vitro and tissue toxicity in vivo. Importantly, NLM NPs could load the antitumor peptide of BIM and efficiently improve the resistance of peptide drugs to proteolysis. The BIM peptide was efficiently delivered into the tumor cells by NLM NPs, which can inhibit the growth and promote the apoptosis of cancer cells in vitro, significantly inhibit the tumor growth in vivo. Notably, NLM-BIM theranostic nanoplatform exhibits low systemic toxicity and fewer side effects in vivo. The NLM NPs can serve as a promising multifunctional peptide delivery nanoplatform for multi-modal bioimaging and cancer therapy. | Xiaoyan Qu Zhengqing Liu Bohan Ma Na Li Hongyang Zhao Tian Yang Yumeng Xue Xiaozhi Zhang Yongping Shao Ying Chang Jun Xu Bo Lei Yaping Du | 2019 | Nano Research2019，12，3： | 2 |
| 14 | Mobile phone recognition method based on bilinear convolutional neural network显示文摘Model recognition of second-hand mobile phones has been considered as an essential process to improve the efficiency of phone recycling. However, due to the diversity of mobile phone appearances, it is difficult to realize accurate recognition. To solve this problem, a mobile phone recognition method based on bilinear-convolutional neural network(B-CNN) is proposed in this paper.First, a feature extraction model, based on B-CNN, is designed to adaptively extract local features from the images of secondhand mobile phones. Second, a joint loss function, constructed by center distance and softmax, is developed to reduce the interclass feature distance during the training process. Third, a parameter downscaling method, derived from the kernel discriminant analysis algorithm, is introduced to eliminate redundant features in B-CNN. Finally, the experimental results demonstrate that the B-CNN method can achieve higher accuracy than some existing methods. | HAN HongGui ZHEN Qi YANG HongYan DU YongPing QIAO JunFei | 2021 | Science China(Technological Sciences)2021，64，11： | 2 |
| 15 | Transportation characteristics of motor vehicle pollutants near Beijing typical expressway显示文摘As a major source of air pollution in urban areas, the motor vehicle exhaust has attracted more and more attention due to its growing amount and serious harm to human health. It is of benefit to the pollutant control to make clear the transportation characteristics of vehicle exhausts. In this paper, the transportation characteristics of vehicle exhaust pollutants are investigated by means of the on-site measurement based on a typical Beijing expressway-Badaling expressway(G6 state expressway). The concentrations of CO, NO_x, SO_2 and particles near the expressway were obtained, by which the variations of the particle number and mass concentrations, as well as the gas pollutant volume concentrations in the vicinity of the roadways with the distance from the expressway were fitted. The results show that the gas pollutant concentrations and particle concentrations decrease almost exponentially with the distance from the expressway, which is helpful for the air pollutant database establishment and future pollution control in big cities. | LI YanLong ZHANG DaiChao JIN XinMing YANG LiJun DU XiaoZe YANG YongPing | 2016 | Science China(Technological Sciences)2016，59，3： | 2 |
| 16 | Modeling and experimental study of grinding forces in surface grinding显示文摘 | TANG Jinyuan DU Jin CHEN Yongping | 2008 | Journal of Materials Processing Technology2008，209，： | 1 |
| 17 | Transjugular Intrahepatic Portosystemic Shunt Versus Endoscopic Therapy in the Secondary Prophylaxis of Variceal Rebleeding in Cirrhotic Patients: Meta-analysis Update显示文摘 | Minghua Zheng Yongping Chen Jianling Bai Qiqiang Zeng Jie You Rong Jin Xiaosa Zhou Hong Shen Yi Zheng Zhou Du | 2008 | Journal of Clinical Gastroenterology2008，，5： | 1 |
| 18 | Controllable data synthesis method for grammatical error correction显示文摘Due to the lack of parallel data in current grammatical error correction(GEC)task,models based on sequence to sequence framework cannot be adequately trained to obtain higher performance.We propose two data synthesis methods which can control the error rate and the ratio of error types on synthetic data.The first approach is to corrupt each word in the monolingual corpus with a fixed probability,including replacement,insertion and deletion.Another approach is to train error generation models and further filtering the decoding results of the models.The experiments on different synthetic data show that the error rate is 40%and that the ratio of error types is the same can improve the model performance better.Finally,we synthesize about 100 million data and achieve comparable performance as the state of the art,which uses twice as much data as we use. | Liner Yang Chengcheng Wang Yun Chen Yongping Du Erhong Yang | 2022 | Frontiers of Computer Science2022，16，4： | 1 |
| 19 | Prun- ing least objective contribution in KMSE 显示文摘 | Zhao Yongping Sun Jianguo Du Zhonghua | 2011 | Neurocom- puting2011，74，17： | 1 |
| 20 | Analysis of plate multi-effect distillation system coupled with thermal power generating unit显示文摘 | Zhihua Ge Chunjie Yang Yun Liu Xiaoze Du Lijun Yang Yongping Yang | 2014 | Applied Thermal Engineering2014，，： | 1 |
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