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52篇 您的检索式:作者名="Jianjun Tan"
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1Effects of Flexibility and Suspension Configuration of Main Shaft on Dynamic Characteristics of Wind Turbine Drivetrain显示文摘The current research of wind turbine drivetrain is mainly concentrated in dynamic characteristics of gearbox with a specific suspension of main shaft, such as one-point and two-point suspension. However, little attention is paid to the e ects of these suspension configurations on the dynamic responses of wind turbine gearbox. This paper investigates the influences of suspension configurations of main shaft on the dynamic characteristics of drivetrain. For evaluating the dynamic behaviors of drivetrain with multi-stage transmission system more realistically, a dynamic modeling approach of drivetrain is proposed based on Timoshenko beam theory and Lagrange's equation. Considering the flexibility and di erent suspension configurations of main shaft, time-varying mesh sti ness excitation, time-varying transmission error excitation and gravity excitation, etc., a three-dimensional dynamic model of drivetrain is developed, and the dynamic responses of drivetrain are investigated. Results show that with the one-point suspension of main shaft, the resonance frequencies in gearbox, especially at the low-speed stage, obviously shift to the higher frequency range compared to the gearbox without main shaft, but this trend could be inversed by increasing main shaft length. Meanwhile, the loads in main shaft, main shaft bearing and carrier bearing are greatly sensitive to the main shaft length. Hence, the load sharing is further disrupted by main shaft, but this e ect could be alleviated by larger load torque. Comparing to the one-point suspension of main shaft, there occurs the obvious load reduction at the low-speed stage with two-point suspension of main shaft. However, those advantages greatly depend on the distance between two main bearings, and come at the expense of increased load in upwind main shaft unit and the corresponding main bearing. Finally, a wind field test is conducted to verify the proposed drivetrain model. This study develops a numerical model of drivetrain which is able to evaluate the e ects of di erent suspension configurations of main shaft on gearbox.Jianjun Tan Caichao Zhu Chaosheng Song Huali Han Yao Li 2019Chinese Journal of Mechanical Engineering2019,32,2:7
2Co-seismic Faults and Geological Hazards and Incidence of Active Fault of Wenchuan Ms 8.0 Earthquake,Sichuan,China显示文摘There are two co-seismic faults which developed when the Wenchuan earthquake happened. One occurred along the active fault zone in the central Longmen Mts.and the other in the front of Longmen Mts.The length of which is more than 270 km and about 80 km respectively.The co-seismic fault shows a reverse flexure belt with strike of N45°-60°E in the ground,which caused uplift at its northwest side and subsidence at the southeast.The fault face dips to the northwest with a dip angle ranging from 50°to 60°.The vertical offset of the co-seismic fault ranges 2.5-3.0 m along the Yingxiu-Beichuan co-seismic fault,and 1.5-1.1 m along the Doujiangyan-Hanwang fault.Movement of the coseismic fault presents obvious segmented features along the active fault zone in central Longmen Mts. For instance,in the section from Yingxiu to Leigu town,thrust without evident slip occurred;while from Beichuan to Qingchuan,thrust and dextral strike-slip take place.Main movement along the front Longmen Mts.shows thrust without slip and segmented features.The area of earthquake intensity more thanⅨdegree and the distribution of secondary geological hazards occurred along the hanging wall of co-seismic faults,and were consistent with the area of aftershock,and its width is less than 40km from co-seismic faults in the hanging wall.The secondary geological hazards,collapses,landslides, debris flows et al.,concentrated in the hanging wall of co-seismic fault within 0-20 km from co-seismic fault.MA Yinsheng LONG Changxing TAN Chengxuan WANG Tao GONG Mingquan LIAO Chunting WU Manlu SHI Wei DU Jianjun PAN Feng 2009Acta Geologica Sinica(English Edition)2009,83,4:7
3Description of the First Strain of 2019-nCoV,C-Tan-nCoV Wuhan Strain-National Pathogen Resource Center,China,2020显示文摘The recent outbreak of novel coronavirus-infected pneumonia(NCIP)in China(1)has attracted much attention domestically and internationally.As the outbreak occurred,China carried out emergency responses quickly,notified the World Health Organization(WHO)in a timely manner,and shared the viral gene sequence with international communities immediately after pathogenic identification.Qiang Wei Yanhai Wang Juncai Ma Jun Han Mengnan Jiang Li Zhao Fei Ye Jingdong Song Bo Liu Linhuan Wu Wenjie Tan Guizhen Wu George FGao Jianjun Liu 2020China CDC weekly2020,2,6:5
4Stand basal area modelling for Chinese fir plantations using an artificial neural network model显示文摘Artificial neural network models are a popular estimation tool for fitting nonlinear relationships because they require no assumptions about the form of the fitting function,non-Gaussian distributions,multicollinearity,outliers and noise in the data.The problems of backpropagation models using artificial neural networks include determination of the structure of the network and overlearning courses.According to data from 1981 to 2008 from 15 permanent sample plots on Dagangshan Mountain in Jiangxi Province,a back-propagation artificial neural network model(BPANN)and a support vector machine model(SVM)for basal area of Chinese fir(Cunninghamia lanceolata)plantations were constructed using four kinds of prediction factors,including stand age,site index,surviving stem numbers and quadratic mean diameters.Artificial intelligence methods,especially SVM,could be effective in describing stand basal area growth of Chinese fir under different growth conditions with higher simulation precision than traditional regression models.SVM and the Chapman–Richards nonlinear mixed-effects model had less systematic bias than the BPANN.Shaohui Che Xiaohong Tan Congwei Xiang Jianjun Sun Xiaoyan Hu Xiongqing Zhang Aiguo Duan Jianguo Zhang 2019Journal of Forestry Research2019,30,5:4
5Sand-fixing characteristics of Carex brunnescens and its application with straw checkerboard technique in restoration of degraded alpine meadows显示文摘Carex brunnescens(Pers.), a typical clonal species, is considered to be the only herb found to date that can develop on sand dunes in Maqu alpine region of northwestern China. However, the characteristics that C. brunnescens resists to harsh alpine environment have not been documented. In this study, we conducted a field investigation to determine the morphological, reproductive, and sand-fixing characteristics of C. brunnescens. Concomitantly, we transplanted the belowground rhizomes of C. brunnescens to sand dunes and compared the abilities to restore degraded alpine meadows among sand dunes that had no further treatment(SD+N), sand dunes that had straw checkerboard technique but no transplanted rhizomes of C. brunnescens(SD+SCT), and sand dunes that had both SCT and transplanted rhizomes of C. brunnescens(SD+SCT+P). We found that belowground vertical rhizomes and horizontal rhizomes(including branching rhizomes and main rhizomes) of C. brunnescens were highly developed and that population reproduction was dominated by horizontal rhizomes. C. brunnescens exhibited a significant sand-fixation effect under following conditions: population density was 145–156 ramets/m^2, vegetation cover was 31.2%–39.3%, total length of belowground rhizomes was 11,223 cm/m^2, total length of belowground first-order roots was 9161–10,524 cm/m^2, fresh weight of aboveground part was 198.5–212.6 g/m^2, and fresh weight of belowground part was 578.8–612.4 g/m^2. It should be particularly noted that SD+SCT+P treatment(sand dunes that had both straw checkerboard technique and transplanted rhizomes of C. brunnescens) was the best and SD+N(sand dunes that had no further treatment) was the worst in terms of following biotic indicators: total number of reproductive ramets, total number of belowground rhizomes, and fresh weight of aboveground and belowground parts of C. brunnescens, contents of soil organic carbon, available nitrogen, microbial biomass carbon, and microbial biomass nitrogen. It implies that applying SCT in sand dunes and transplanting belowground rhizomes to sand dunes with SCT could improve both soil fertility and growth of C. brunnescens. These results suggest that the SCT-promoted high reproductive abilities of belowground rhizomes of C. brunnescens can successfully facilitate the establishment of ramets and can thus be an effective strategy to restore degraded vegetation in Maqu alpine region of northwestern China.KANG Jianjun ZHAO Ming TAN Yanrong ZHU li BING Danhui ZHANG Yangdong TONG Shengli 2017Journal of Arid Land2017,9,5:4
6Progress of Jinping Underground laboratory for Nuclear Astrophysics(JUNA)显示文摘Jinping Underground laboratory for Nuclear Astrophysics(JUNA) will take the advantage of the ultra-low background of CJPL lab and high current accelerator based on an ECR source and a highly sensitive detector to directly study for the first time a number of crucial reactions occurring at their relevant stellar energies during the evolution of hydrostatic stars. In its first phase, JUNA aims at the direct measurements of^(25)Mg(p,γ)^(26)Al,^(19)F(p,α)^(16)O,^(13)C(α,n)^(16)O and ^(12)C(α,γ)^(16)O reactions. The experimental setup,which includes an accelerator system with high stability and high intensity, a detector system, and a shielding material with low background, will be established during the above research. The current progress of JUNA will be given.WeiPing Liu ZhiHong Li JiangJun He XiaoDong Tang Gang Lian Zhu An JianJun Chang Han Chen QingHao Chen XiongJun Chen ZhiJun Chen BaoQun Cui XianChao Du ChangBo Fu Lin Gan Bing Guo GuoZhu He Alexander Heger SuQing Hou HanXiong Huang Ning Huang BaoLu Jia LiYang Jiang Shigeru Kubono JianMin Li KuoAng Li Tao Li YunJu Li Maria Lugaro XiaoBing Luo HongYi Ma ShaoBo Ma DongMing Mei YongZhong Qian JiuChang Qin Jie Ren YangPing Shen Jun Su LiangTing Sun WanPeng Tan Isao Tanihata Shuo Wang Peng Wang YouBao Wang Qi Wu ShiWei Xu ShengQuan Yan LiTao Yang Yao Yang XiangQing Yu Qian Yue Sheng Zeng HuanYu Zhang Hui Zhang LiYong Zhang NingTao Zhang QiWei Zhang Tao Zhang XiaoPeng Zhang XueZhen Zhang ZiMing Zhang Wei Zhao Zuo Zhao Chao Zhou 2016Science China(Physics,Mechanics & Astronomy)2016,59,4:3
7Construction of the Chinese Veteran Clinical Research (CVCR) Platform for the assessment of non-communicable diseases显示文摘Tan Jiping Li Nan Gao Jing Guo Yuhe Hu Wei Yang Jinsheng Yu Baocheng Yu Jianmin Du Wei Zhang Wenjun Cui Lianqi Wang Qingsong Xia Xiangnan Li Jianjun Zhou Peiyi Zhang Baohe Liu Zhiying Zhang Shaogang Sun Lanying Liu Nan Deng Ruixiang Dai Wenguang Yi Fang Chen Wenjun Zhang Yongqing Xue Shenwu Cui Bo Zhao Yiming Wang Luning 2014Chinese Medical Journal2014,,3:3
8Endoscopic or laparoscopic approach for hepatolithiasis in the era of endoscopy in China显示文摘JingWang Tan YunChang Tan Fei Chen YuL. Zhu JianJun Leng JiaHong Dong 2015Surgical Endoscopy2015,,1:2
9Extraction and identification of the chyme proteins in the digestive tract of growing pigs显示文摘This study aimed to explore the rule of degradation of dietary proteins by identifying chyme proteins in different segments of the digestive tract of growing pigs, using proteomics techniques. Six growing pigs were fed a corn-soybean meal-based diet for 7 days. The feedstuff and chyme proteins were separately extracted and separated with SDS-PAGE. 2 D LCMS/MS combined with protein database searching identified 1,513 proteins in different segments of the gastrointestinal tract, the number of identified exogenous proteins gradually decline from the stomach to colon, with large amounts in the duodenum to the large intestine.More corn proteins than soybean proteins were identified both in the feedstuff and chyme, and these were significantly decreased after digestion in the stomach. More membrane proteins than non-membrane proteins were identified in whole digestive tract.These results regarding the profiles of chyme proteins in different segments of the gastrointestinal tract would provide useful information for optimizing feed formula in pigs.Jianjun Li Bie Tan Yulong Tang Peng Liao Kang Yao Peng Ji Yulong Yin 2018Science China(Life Sciences)2018,61,11:2
10Glutamine,glutamate,and aspartate differently modulate energy homeostasis of small intestine under normal or low energy status in piglets显示文摘Weaning stress may cause reduced energy intake for maintenance of mucosal structure.Gln,Glu,and Asp are major energy sources for the small intestine.This study investigated whether Gln,Glu,and Asp improve the intestinal morphology via regulating the energy metabolism in weaning piglets.A total of 198 weaned piglets were assigned to 3 treatments:Control(Basal diet+1.59%L-Ala);T1(Basal diet+1%L-Gln+0.5%L-Glu+0.1%L-Asp);T2(Low energy diet+1%L-Gln+0.5%L-Glu+0.1%L-Asp).Jejunum and ileum were obtained on d 5 or 21 post-weaning.T1 enhanced growth performance.T1 and T2 treatments improved small intestinal morphology by increasing villus height,goblet cell number and decreasing crypt depth.Days post-weaning affected the efficacy of T2,but not T1,on energy metabolism.At normal energy supplementation,Gln,Glu,and Asp restored small intestinal energy homeostasis via replenishing the Krebs'cycle and down-regulating the AMPK(adenosine monophosphate activated protein kinase)pathway.As these are not sufficient to maintain the intestinal energy-balance of piglets fed with a low energy diet on d 5 post-weaning,the AMPK,glycolysis,beta-oxidation,and mitochondrial biogenesis are activated to meet the high energy demand of enterocytes.These data indicated that Gln,Glu,and Asp could restore the energy homeostasis of intestinal mucosa of weaning piglets under normal energy fed.Low energy feeding may increase the susceptibility of piglets to stress,which may decrease the efficacy of Gln,Glu,and Asp on the restoration of energy balance.These findings provide new information on nutritional intervention for insufficient energy intake in weaning piglets.Jing Wang Nan Wang Ming Qi Jianjun Li Bie Tan 2022Animal Nutrition2022,,1:2
11Genetic Characterization of Two Human Cases Infected with the Avian Influenza A(H5N6)Viruses—Guangxi Zhuang Autonomous Region,China,2021显示文摘Summary What is known about this topic?H5N6 has replaced H5N1 as a dominant avian influenza virus(AIV)subtype in southern China.The increasing genetic diversity and geographical distribution of H5N6 pose a serious threat to the poultry industry and human health.What is added by this report?A total of 2 cases of H5N6 that occurred from February 2021 to July 2021 in Guangxi.Fuyin Bi Lili Jiang Lihua Huang Jingguang Wei Xiaowen Pan Yu Ju Jianjun Mo Minmei Chen Ning Kang Yi Tan Yonghong Li Jing Wang 2021China CDC weekly2021,3,44:2
12Sustained delivery of rhMG53 promotes diabetic wound healing and hair follicle development显示文摘MG53 is an essential component of the cell membrane repair machinery,participating in the healing of dermal wounds.Here we develop a novel delivery system using recombinant human MG53(rhMG53)protein and a reactive oxygen species(ROS)-scavenging gel to treat diabetic wounds.Mice with ablation of MG53 display defective hair follicle structure,and topical application of rhMG53 can promote hair growth in the mg53/mice.Cell lineage tracing studies reveal a physiological function of MG53 in modulating the proliferation of hair follicle stem cells(HFSCs).We find that rhMG53 protects HFSCs from oxidative stress-induced apoptosis and stimulates differentiation of HSFCs into keratinocytes.The cytoprotective function of MG53 is mediated by STATs and MAPK signaling in HFSCs.The thermosensitive ROS-scavenging gel encapsulated with rhMG53 allows for sustained release of rhMG53 and promotes healing of chronic cutaneous wounds and hair follicle development in the db/db mice.These findings support the potential therapeutic value of using rhMG53 in combination with ROS-scavenging gel to treat diabetic wounds.Hong Niu Haichang Li Ya Guan Xin Zhou Zhongguang Li Serana Li Zhao Peng Chen Tao Tan Hua Zhu Valerie Bergdall Xuehong Xu Jianjie Ma Jianjun Guan 2022Bioactive Materials2022,7,12:2
13PV Power Short-Term Forecasting Model Based on the Data Gathered from Monitoring Network显示文摘ZHONG Zhifeng TAN Jianjun ZHANG Tianjin ZHU Linlin 2014China Communications2014,11,A02:1
14The first strain of monkeypox isolated in the Chinese Mainland and preserved at the National Pathogen Resource Center of China显示文摘On September 16,2022,the first imported monkeypox case was reported in the Chinese Mainland.Laboratory tests including nucleic acid detection were carried out in Chongqing Nan’an Centre for Disease Control and Prevention and Chongqing Center for Disease Control and Prevention.After that,monkeypox virus was isolated by the Institute for Viral Disease Control and Prevention and preserved at the National Pathogen Resource Center on September 18,2022.The National Pathogen Resource Center shared the basic information of monkeypox virus strain,samples,biosafety,strain imaging,RT-PCR primers,and probes sequence timely to support the prevention and control of monkeypox epidemic and facilitate the scientific research on vaccine development,drug screening and evaluation of monkeypox virus in the future.Qiang Wei Baoying Huang Wei Huang Jingdong Song Li Mei Li Zhao Jing Yin Juan Zhang Wenling Wang Fei Ye Caiyun Li Liling Bai Yanhai Wang Yao Deng Bo Liu Mengnan Jiang Guizhen Wu Jun Han Hua Zhao Hua Ling Wenjie Tan Jianjun Liu 2022Infectious Medicine2022,1,4:1
15Multi-scale and multi-modal GIS-T data model显示文摘Shaopei Chen Jianjun Tan Christophe Claramunt Cyril Ray 2009Journal of Transport Geography2009,,1:1
16Pharmacophore and Docking-based 3D-QSAR Studies on HIV-1 Integrase Inhibitors显示文摘ZHANG Xiaoyi DENG Dongjie TAN Jianjun HE Yu LI Chunhua WANG Cunxin 2014Chemical Research in Chinese Universities2014,30,2:1
17FPGA realization of FIR filters for high-speed and medium-speed by using modified distributed arithmetic architectures显示文摘Xie Jiafeng He Jianjun Tan Guanzheng 2010Microelectronics Journal2010,41,:1
18WIP1 promotes cancer stem cell properties by inhibiting p38 MAPK in NSCLC显示文摘Cancer stem cells(CSCs)are a small population of stem cell-like cancer cells that can initiate tumors in vivo,and are the major source of cancer initiation,relapse,and drug resistance.We previously reported that the p38 MAPK,through its downstream effectors MK2 and HSP27,suppressed CSC properties by downregulating the expression of transcription factors that mediate stemness in non-small-cell lung cancer(NSCLC)cells,and that despite unaltered total expression of total p38 proteins,the levels of activated p38 were reduced in NSCLC tissues.However,the mechanism underlying the reduced levels of activated p38 in NSCLC is unknown.In this study,we identified WIP1,a p38 phosphatase frequently overexpressed in cancer,as a suppressor of p38 in a pathway that regulates CSC properties in NSCLC.Increased WIP1 expression correlated with reduced levels of activated p38,and with increased levels of a CSC marker in NSCLC tissues.Further investigation revealed that WIP1 promoted stemness-related protein expression and CSC properties by inhibiting p38 activity in NSCLC cells.WIP1 inhibitors are currently under development as anticancer drugs based on their ability to reactivate p53.We found that a WIP1 inhibitor suppressed stemness-related protein expression and CSC properties by activating p38 in NSCLC cells in vitro and in vivo.These studies have identified the WIP1–p38–MK2–HSP27 cascade as a novel signaling pathway that,when altered,promotes CSC properties in NSCLC development,and have defined novel mechanisms underlying the oncogenic activity of WIP1 and the anticancer efficacy of WIP1 inhibitors.Kaiyuan Deng Liang Liu Xiaoming Tan Zhen Zhang Jianjun Li Yang Ou Xin Wang Shuang Yang Rong Xiang Peiqing Sun 2020Signal Transduction and Targeted Therapy2020,5,1:1
19Examining the driving forces for improving China’s CO 2 emission intensity using the decomposing method显示文摘Zhongfu Tan Li Li Jianjun Wang Jianhui Wang 2011Applied Energy2011,,12:1
20In vivo and in vitro antiproliferative and antimetastatic effects of hemolymph of Aspongopus chinensis Dallas on breast cancer cells显示文摘OBJECTIVE:To investigate the effects of Aspongopus(A.)chinensis hemolymph on the proliferation and metastasis of breast cancer cells.METHODS:The in vitro effects of A.chinensis hemolymph were investigated in murine(4T1)and human(HCC1937)breast cancer cell lines.Cytotoxicity,cell apoptosis,and cell migration were evaluated by using the cell counting kit-8 assay,Hoechst staining,and wound healing experiments,respectively.A syngeneic mouse model was established to evaluate the in vivo effects of the hemolymph extract on tumor growth and metastasis.Mouse body weight,tumor size,blood levels of function-related enzymes,and pathological features of the liver and kidney tissues were evaluated.RESULTS:The hemolymph of A.chinensis significantly inhibited in vitro tumor cell migration and viability while inducing apoptosis.Furthermore,it inhibited in vivo tumor growth and metastasis with a minimal effect on mouse body weight,and did not induce liver or kidney damage.CONCLUSION:Our results suggested that the A.chinensis hemolymph has antitumorigenic properties,suggesting it has potential as a novel therapeutic option for the treatment of metastatic breast cancer.ZHAO Shuai TAN Jun YU Hengmei TIAN Ying WU Youfang LUO Rui GUO Jianjun 2021Journal of Traditional Chinese Medicine2021,41,4:1
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