|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Numerical Simulation and Experimental Study of Heat-fluid-solid Coupling of Double Flapper-nozzle Servo Valve显示文摘The double flapper-nozzle servo valve is widely used to launch and guide the equipment. Due to the large instantaneous flow rate of servo valve working under specific operating conditions, the temperature of servo valve would reach 120℃ and the valve core and valve sleeve deform in a short amount of time. So the control precision of servo valve significantly decreases and the clamping stagnation phenomenon of valve core appears. In order to solve the problem of degraded control accuracy and clamping stagnation of servo valve under large temperature difference circumstance, the numerical simulation of heat-fluid-solid coupling by using finite element method is done. The simulation result shows that zero position leakage of servo valve is basically impacted by oil temperature and change of fit clearance. The clamping stagnation is caused by warpage-deformation and fit clearance reduction of the valve core and valve sleeve. The distribution rules of the temperature and thermal-deformation of shell, valve core and valve sleeve and the pressure, velocity and temperature field of flow channel are also analyzed. Zero position leakage and electromagnet's current when valve core moves in full-stroke are tested using Electro-hydraulic Servo-valve Characteristic Test-bed of an aerospace sciences and technology corporation. The experimental results show that the change law of experimental current at different oil temperatures is roughly identical to simulation current. The current curve of the electromagnet is smooth when oil temperature is below 80℃, but the amplitude of current significantly increases and the hairy appears when oil temperature is above 80℃. The current becomes smooth again after the warped valve core and valve sleeve are reground. It indicates that clamping stagnation is caused by warpage-deformation and fit clearance reduction of valve core and valve sleeve. This paper simulates and tests the heat-fluid-solid coupling of double flapper-nozzle servo valve, and the obtained results provide the reference value for the design of double flapper-nozzle force feedback servo valve. | ZHAO Jianhua ZHOU Songlin LU Xianghui GAO Dianrong | 2015 | Chinese Journal of Mechanical Engineering2015，28，5： | 16 |
| 2 | Development of real-time laser-scanning system to detect tree canopy characteristics for variable-rate pesticide application显示文摘Improving pesticide application efficiency is increasingly important in orchard spraying.In this study,a laser-scanning system was designed to acquire gridding volumes of a tree to quantify the geometry characteristics of the tree canopy in real-time.A laser-scanning sensor mounted on a linear guide was utilized to measure the structure of a target tree canopy.A computer was used to receive measurement data from the laser scanner and obtain the movement distance of the laser-scanning sensor from a controller.An algorithm written with VC#program was designed to calculate gridding volumes of trees by recognizing valid measurement data from the laser scanner.Laboratory evaluations were conducted on three kinds of regular objects,and the maximum relative errors of section volumes of the cuboid,triangular prism and cylinder objects were 3.3%,7.9%and 9.4%,respectively,which illustrated that the algorithm could calculate the section volumes in different parts of the objects with high accuracy.A conifer tree and an apple tree were chosen to verify detecting accuracy of the laser-scanning system at variable speeds and grid sizes.The variation coefficients of total volumes for each kind of the tree were 0.078 and 0.041,respectively,which indicated that the laser-scanning system could be applied to provide the gridding volumes of different canopy densities in real-time with good reliability for guiding a variable-rate sprayer. | Cai Jichen Wang Xiu Song Jian Wang Songlin Yang Shuo Zhao Chunjiang | 2017 | International Journal of Agricultural and Biological Engineering2017，10，6： | 14 |
| 3 | Clue to a thorough understanding of terahertz pulse generation by femtosecond laser filamentation显示文摘In this work, it has been demonstrated that in order to fully understand the terahertz(THz) pulse generation process during femtosecond laser filamentation, the interaction between THz wave and air plasma has to be taken into account. This interaction is mainly associated with the spatial confinement of the THz pulse by the plasma column, which could be described by the one-dimensional negative dielectric(1DND) waveguide model. By combining the 1 DND model with the conventional four-wave mixing(4WM) and photocurrent(PC) models,the variation of THz spectral amplitude and width obtained in experiments could be better understood. Finally, a three-step procedure, with 1DND bridging 4WM and PC processes, has been established for the first time to describe the underlying mechanism of THz radiation from plasma sources. | JIAYU ZHAO WEIWEI LIU SHICHANG LI DAN LU YIZHU ZHANG YAN PENG YIMING ZHU SONGLIN ZHUANG | 2018 | Photonics Research2018，6，4： | 9 |
| 4 | Chinese Stroke Association guidelines for clinical management of cerebrovascular disorders: executive summary and 2019 update of clinical management of intracerebral haemorrhage显示文摘Aim This evidence-based guideline aims to present current and comprehensive recommendations for the diagnosis and management of spontaneous intracerebral haemorrhage(ICH).Methods A formal literature search was conducted on MEDLINE(1 January 1990 to 30 June 2019).Data were synthesised using evidence tables.The members of the working group met by teleconference to update and formulate data-based recommendations.The recommendations are graded according to levels of evidence grading algorithm of the Chinese Stroke Association.The guideline draft has been reviewed by Chinese Stroke Association Stroke Council Guideline Writing Committee.Results Evidence-based guideline is proposed for the management of patients with ICH.The focus of the guideline is divided into the diagnosis and aetiology of ICH,management of ICH in emergency department,surgical treatment for removal of hematoma,management of complications and prevention of secondary ICH.Conclusions This guideline provides a framework for ICH management.Early active and reasonable treatment may improve the clinical outcome of patients. | Yong Cao Songlin Yu Qian Zhang Tao Yu Yanfang Liu Zhenghui Sun Meng Zhao Wen Wang Ji Zong Zhao | 2020 | Stroke & Vascular Neurology2020，5，4： | 8 |
| 5 | Circular RNA circStag1 promotes bone regeneration by interacting with HuR显示文摘Postmenopausal osteoporosis is a common bone metabolic disorder characterized by deterioration of the bone microarchitecture,leading to an increased risk of fractures.Recently,circular RNAs(circ RNAs)have been demonstrated to play pivotal roles in regulating bone metabolism.However,the underlying functions of circ RNAs in bone metabolism in postmenopausal osteoporosis remain obscure.Here,we report that circ Stag1 is a critical osteoporosis-related circ RNA that shows significantly downregulated expression in osteoporotic bone marrow mesenchymal stem cells(BMSCs)and clinical bone tissue samples from patients with osteoporosis.Overexpression of circ Stag1 significantly promoted the osteogenic capability of BMSCs.Mechanistically,we found that circ Stag1 interacts with human antigen R(Hu R),an RNA-binding protein,and promotes the translocation of Hu R into the cytoplasm.A high cytoplasmic level of Hu R led to the activation of the Wnt signaling pathway by stabilizing and enhancing low-density lipoprotein receptor-related protein 5/6(Lrp5/6)andβ-catenin expression,thereby stimulating the osteogenic differentiation of BMSCs.Furthermore,overexpression of circ Stag1 in vivo by circ Stag1-loaded adeno-associated virus(circ Stag1-AAV)promoted new bone formation,thereby preventing bone loss in ovariectomized rats.Collectively,we show that circ Stag1 plays a pivotal role in promoting the regeneration of bone tissue via Hu R/Wnt signaling,which may provide new strategies to prevent bone metabolic disorders such as postmenopausal osteoporosis. | Gaoyang Chen Canling Long Shang Wang Zhenmin Wang Xin Chen Wanze Tang Xiaoqin He Zhiteng Bao Baoyu Tan Jin Zhao Yongheng Xie Zhizhong Li Dazhi Yang Guozhi Xiao Songlin Peng | 2022 | Bone Research2022，10，3： | 7 |
| 6 | Microelement analysis of source of raw materials of terracotta warriors and horses of Qin's Mausoleum in pits No.1 and No.2显示文摘In order to search for sources of the raw material of the Qin’s terracotta warriors and horses, we selected 20 samples of pottery warriors and pottery horses of the Qin’s Mausoleum from pit No. 1,19 samples of pottery warriors and brick from pit No. 2, 20 samples of clays near the Qin’s Mausoleum and 2 samples of Yaozhou porcelain bodies. The 32 kinds of element content of each sample were measured by neutron activation analysis (NAA). These data were analyzed by fuzzy cluster analysis, the trend cluster analysis diagram was obtained. The results showed that samples of terracotta warriors and horses from pits No.1 and No. 2 were closely related to the loam layer near Qin’s Mausoleum, but their relations with the loess layers were not so close, and they were out of all relation to Yaozhou porcelain bodies. Thus, it could be deduced that the Li Mountain clay may be considered as the original place of the raw materials of the terracotta warriors and horses, the kiln sites might be located nearby the Qin’s | Weijuan Zhao Aijun Xu Rongwu Li Zhengyao Gao Guoxia Li Jianzhong Xie Guohe Han Songlin Feng Dongyu Fan Ying Zhang et al. | 2002 | Chinese Science Bulletin2002，47，16： | 6 |
| 7 | Fatigue Life Prediction under Service Load Considering Strengthening Effect of Loads below Fatigue Limit显示文摘Lightweight design requires an accurate life prediction for structures and components under service loading histories. However, predicted life with the existing methods seems too conservative in some cases, leading to a heavy structure. Because these methods are established on the basis that load cycles would only cause fatigue damage, ignore the strengthening effect of loads. Based on Palmgren-Miner Rule(PMR), this paper introduces a new method for fatigue life prediction under service loadings by taking into account the strengthening effect of loads below the fatigue limit. In this method, the service loadings are classified into three categories: damaging load, strengthening load and none-effect load, and the process for fatigue life prediction is divided into two stages: stage I and stage II, according to the best strengthening number of cycles. During stage I, fatigue damage is calculated considering both the strengthening and damaging effect of load cycles. While during stage II, only the damaging effect is considered. To validate this method, fatigue lives of automobile half shaft and torsion beam rear axle are calculated based on the new method and traditional methods, such as PMR and Modified Miner Rule(MMR), and fatigue tests of the two components are conducted under service loading histories. The tests results show that the percentage errors of the predicted life with the new method to mean life of tests for the two components are –3.78% and –1.76% separately, much lesser than that with PMR and MMR. By considering the strengthening effect of loads below the fatigue limit, the new method can significantly improve the accuracy for fatigue life prediction. Thus lightweight design can be fully realized in the design stage. | ZHAO Lihui ZHENG Songlin FENG Jinzhi | 2014 | Chinese Journal of Mechanical Engineering2014，27，6： | 4 |
| 8 | Generalized Cauchy Matrix Approach for Lattice Boussinesq-Type Equations显示文摘The authors generalize the Cauchy matrix approach to get exact solutions to the lattice Boussinesq-type equations:lattice Boussinesq equation,lattice modified Boussinesq equation and lattice Schwarzian Boussinesq equation.Some kinds of solutions including soliton solutions,Jordan block solutions and mixed solutions are obtained. | Songlin ZHAO Dajun ZHANG Ying SHI | 2012 | Chinese Annals of Mathematics,Series B2012，33，2： | 3 |
| 9 | Colour compound lenses for a portable fluorescence microscope显示文摘In this article,we demonstrated a handheld smartphone fluorescence microscope(HSFM)that integrates dualfunctional polymer lenses with a smartphone.The HSFM consists of a smartphone,a field-portable illumination source,and a dual-functional polymer lens that performs both optical imaging and filtering.Therefore,compared with the existing smartphone fluorescence microscope,the HSFM does not need any additional optical filters.Although fluorescence imaging has traditionally played an indispensable role in biomedical and clinical applications due to its high specificity and sensitivity for detecting cells,proteins,DNAs/RNAs,etc.,the bulky elements of conventional fluorescence microscopes make them inconvenient for use in point-of-care diagnosis.The HSFM demonstrated in this article solves this problem by providing a multifunctional,miniature,small-form-factor fluorescence module.This multifunctional fluorescence module can be seamlessly attached to any smartphone camera for both bright-field and fluorescence imaging at cellular-scale resolutions without the use of additional bulky lenses/filters;in fact,the HSFM achieves magnification and light filtration using a single lens.Cell and tissue observation,cell counting,plasmid transfection evaluation,and superoxide production analysis were performed using this device.Notably,this lens system has the unique capability of functioning with numerous smartphones,irrespective of the smartphone model and the camera technology housed within each device.As such,this HSFM has the potential to pave the way for realtime point-of-care diagnosis and opens up countless possibilities for personalized medicine. | Bo Dai Ziao Jiao Lulu Zheng Hunter Bachman Yongfeng Fu Xinjun Wan Yule Zhang Yu Huang Xiaodian Han Chenglong Zhao Tony Jun Huang Songlin Zhuang Dawei Zhang | 2019 | Light(Science & Applications)2019，8，1： | 3 |
| 10 | miR-20a Promotes the Axon Regeneration of DRG Neurons by Targeting Nr4a3显示文摘Dear Editor,The peripheral nervous system(PNS)regenerates more easily after injury than the central nervous system(CNS)[1].Sensory neurons in the L4–L6 dorsal root ganglia(DRGs)extend axons to form the sciatic nerve along with motor axons.The DRG neuron is one of the exceptional mature neurons whose axons can regenerate after injury. | Lili Zhao Leilei Gong Ping Li Jing Qin Lingchi Xu Qiyao Wei Huimin Xie Susu Mao Bin Yu Xiaosong Gu Songlin Zhou | 2021 | Neuroscience Bulletin2021，37，4： | 3 |
| 11 | Neutron activation analysis and Mossbauer spectroscopy research on coloring mechanism of Chinese Ru porcelain显示文摘The characteristic spectrum and its main wavelength of Ru porcelain glaze are measured by color difference instrument to determine the relations between glaze color and its main wavelength. The content of the 30 coloring elements in Ru porcelain is determined by neutron activation analysis (NAA), which showed that iron is the major coloring element. Mossbauer spectroscopy analysis shows that the iron element in the glaze exists in the form of structural iron (Fe2+, Fe3+). The quantitative relationship between the main wavelength of glaze in various colors and the relative content of structural iron (Fe2+/Fe3+) is determined. Thus the coloring mechanism of Ru porcelain is investigated entirely. | LI Rongwu YANG Lei LI Guoxia ZHAO Weijuan GAO Zhengyao XIE Jianzhong CHEN Jin ZHANG Bin SUN Xinmin FENG Songlin JIA Xiuqin HAN Song HUANG Zhongxiang | 2002 | Chinese Science Bulletin2002，47，14： | 2 |
| 12 | Nitrate increases cisplatin chemosensitivity of oral squamous cell carcinoma via REDD1/AKT signaling pathway显示文摘Although cisplatin is one of the chemotherapeutics most frequently used in oral squamous cell carcinoma(OSCC)treatment,it exerts multiple side effects and poor chemosensitivity.Nitrate reportedly demonstrates several beneficial biological functions,and synthesized nitrates enhance the therapeutic efficacy of chemotherapy.However,the role of inorganic nitrate in cisplatin chemotherapy remains unclear.We therefore investigated the effect of inorganic nitrate exerted on cisplatin sensitivity in OSCC.We found that nitrate did not affect OSCC cell growth and apoptosis in OSCC cells and OSCC xenograft tumor animal studies.Cisplatin induced REDD1 expression and AKT activation in OSCC.However,nitrate could increase cisplatin chemosensitivity,reduce its REDD1 expression,and attenuate AKT signaling activation in OSCC cells.Dysregulation of high levels of REDD1,which could enhance AKT activation,was positively associated with poor prognosis in OSCC patients.Thus,reduced REDD1 expression and retarded AKT activation induced by inorganic nitrate might be a new potential approach to the sensitization of oral cancer to cisplatin treatment in the future. | Yuanyong Feng Xuedi Cao Bin Zhao Chunyan Song Baoxing Pang Liang Hu Chunmei Zhang Jinsong Wang Junqi He Songlin Wang | 2021 | Science China(Life Sciences)2021，64，11： | 2 |
| 13 | Influence of hierarchical ZSM-5 catalysts with various acidity on the dehydration of glycerol to acrolein显示文摘The main challenge in the dehydration of glycerol to acrolein lies in overcoming catalystdeactivation and improving the selectivity to acrolein. The relationship between theacidity in the mesoporous channels and catalytic performance of glycerol dehydration israrely reported. In this work, to investigate the influence of acidity in the mesoporouschannels of hierarchical ZSM-5 catalysts on the dehydration of glycerol to acrolein, a seriesof hierarchical ZSM-5 zeolites with comparable mesoporous volume and mesoporous sizebut different acid properties in mesopores have been successfully prepared via alkalinetreatment. The sample with the abundant mesoporosity and highest acidity display thebest performance. | Shufang Zhao Songlin He Kyung Du Kim Lizhuo Wang Ryong Ryoo Zichun Wang Jun Huang | 2021 | Magnetic Resonance Letters2021，1，1： | 1 |
| 14 | Spatial-temporal characteristics of the coupling coordination of social security and economic development in China during 2002–2018显示文摘Clarifying the relationship between social security and economic development is helpful to realize the sustainable social security system and the stable function of sustainable economic development.In this paper,the entropy method,coupling coordination degree,standard deviation ellipse model,and spatial autocorrelation were used to study the spatial-temporal characteristics of coupling coordination of social security and economic development in China from 2002 to 2018.The results indicate that the relationship between social security and economic development in China has been gradually strengthened in the process of mutual adaptation and common development.The benign interaction between the two was unstable,though the coupling coordination degree gradually transitioned to the primary coupling coordination type.Besides,from a spatial perspective,first,the coupling coordination degree of social security and economic development in China contracted in the east-west and north-south directions,and the coupling coordination clustered in the central region in this period;second,the coupling coordination degree generally presented a positive spatial autocorrelation,and regions with similar coupling coordination degrees were in a state of agglomeration;finally,the hot spots clumped together to form a continuous area in the eastern coastal area while the cold spots expanded toward the northwest and northeast.Furthermore,the random distribution areas exhibited a trend of contraction. | Qiong Li Yang Zhao Songlin Li Lanlan Zhang | 2021 | Regional Sustainability2021，2，2： | 1 |
| 15 | 2 - 42 Development of High-accuracy Detector for Measuring K显示文摘 | Lei Fuan Qin Zhi Song Haihong Dong Chengfu Li Songlin Ding Huajie Tian Wei Zhao Liang Fan Fangli Bai Jing Wu Xiaolei Guo Junsheng | 2010 | IMP & HIRFL Annual Report2010，，1： | 1 |
| 16 | 2 - 43 Determining Threshold Value of High-accuracy Detector for Measuring 40K显示文摘 | Lei Fuan Qin Zhi Song Haihong Dong Chengfu Li Songlin Ding Huajie Tian Wei Zhao Liang Fan Fangli Bai Jing Wu Xiaolei Guo Junsheng | 2010 | IMP & HIRFL Annual Report2010，，1： | 1 |
| 17 | Fault diagnosis of sensor by chaos particle swarm optimization algorithm and support vector machine显示文摘 | ZHAO Chenglin SUN Vuebin SUN Songlin | 2011 | Expert Systems with Applications2011，38，： | 1 |
| 18 | Highly electro-conductive B_(4)C-TiB_(2) composites with threedimensional interconnected intergranular TiB_(2) network显示文摘To achieve lightweight B_(4)C-based composite ceramics with high electrical conductivities and hardness,B_(4)C-TiB_(2) ceramics were fabricated by reactive spark plasma sintering(SPS)using B_(4)C,TiC,and amorphous B as raw materials.During the sintering process,fine B_(4)C-TiB_(2) composite particles are firstly in situ synthesized by the reaction between TiC and B.Then,large raw B_(4)C particles tend to grow at the cost of small B_(4)C particles.Finally,small TiB_(2) grains surround large B_(4)C grains to create a three-dimensional interconnected intergranular TiB_(2) network,which is beneficial for an electro-conductive network and greatly improves the conductivity of the ceramics.The effect of the B_(4)C particle size on the mechanical and electrical properties of the ceramics was investigated.When the particle size of initial B_(4)C powders is 10.29µm,the obtained B_(4)C-15 vol%TiB_(2) composite ceramics exhibit an electrical conductivity as high as 2.79×10^(4) S/m and a density as low as 2.782 g/cm^(3),together with excellent mechanical properties including flexural strength,Vickers hardness(HV),and fracture toughness(KIC)of 676 MPa,28.89 GPa,and 5.28 MPa·m^(1/2),respectively. | Jun ZHAO Dong WANG Xing JIN Xiang DING Jianhua ZHU Songlin RAN | 2023 | Journal of Advanced Ceramics2023，12，1： | 1 |
| 19 | Highly selective oxidation of amines to imines by Mn2O3 catalyst under eco-friendly conditions显示文摘Enhancing the selectivity of imines for the oxidative self-coupling of primary amines was found to be challenging in the heterogeneous catalysis.Three different manganese oxides(M-3,M-4,M-5) were synthesized by controlling the calcination temperature using a simple template-free oxalate route.The prepared manganese oxides were systematically characterized using XRD,N2 sorption,SEM,TEM,XPS,H2-TPR techniques.M-4 gave 96.2% selectivity of imine at 100% conversion of benzylamine,which was far more superior than other existing protocols.Mn^3+/Mn^4+ ratio was found to affect the selectivity of the imines.The probable reaction pathway for amines oxidation catalyzed by manganese oxides was proposed for the first time. | Fushan Chen Tao Yang Songlin Zhao Taotao Jiang Lu Yu Houfeng Xiong Chuankun Guo Yufang Rao Yan Liu Liu Liu Jian Zhou Pengxiang Tu Jun Ni Qunfeng Zhang Xiaonian Li | 2019 | Chinese Chemical Letters2019，30，12： | 1 |
| 20 | Fault diag- nosis of sensor by chaos particle swarm optimization algorithm and support vector machine 显示文摘 | Zhao Chenglin Sun Xuebin Sun Songlin | 2011 | Expert Systems with Appli- cations2011，38，8： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员