维普中文期刊产品整合服务
577篇 您的检索式:作者名="Nie Zhao"
    题名 作者 年代 出处 被引量
1CRISPR-Cas12a has both cis- and trans-cleavage activities on single-stranded DNA显示文摘Shi-Yuan Li Qiu-Xiang Cheng Jia-Kun Liu Xiao-Qun Nie Guo-Ping Zhao Jin Wang 2018Cell Research2018,28,4:41
25-Hydroxymethylcytosine signatures in circulating cell-free DNA as diagnostic biomarkers for human cancers显示文摘象 5-methylcytosine (5mC ) 和 5-hydroxymethylcytosine (5hmC ) 那样的 DNA 修正是知道在哺乳动物影响全球基因表示的 epigenetic 标记。在人的染色体,与基因表示的靠近的关联和高化学的稳定性给他们的流行,这些 DNA epigenetic 标记能为癌症用作理想的 biomarkers 诊断。利用一种高度敏感、选择的化学标记技术,我们这里报导在传播没有房间的 DNA ( cfDNA )并且在从最近与 colorectal 诊断的 260 个病人的一个队收集的配对的肿瘤和邻近的纸巾的 genomic DNA ( gDNA )的 5hmC 的染色体宽的介绍,胃,胰腺,从 90 个健康个人的肝或甲状腺癌症和正常纸巾。5hmC 主要在与开的染色质和容许的 histone 修正重合的 transcriptionally 活跃的区域被散布。柔韧的联系癌症的 5hmC 签名在 cfDNA 被识别为特定的癌症类型是特征的。传播 cfDNA 的 5hmC 底 biomarkers colorectal 和胃的癌症是高度预兆的并且比常规 biomarkers 优异并且比得上从织物活体检视的 5hmC biomarkers。因此,这新策略能从血样品的分析为癌症的诊断和预后导致有效、最低限度地侵略的方法的发展。Wenshuai Li Xu Zhang Xingyu Lu Lei You Yanqun Song Zhongguang Luo Jun Zhang Ji Nie Wanwei Zheng Diannan Xu Yaping Wang Yuanqiang Dong Shulin Yu Jun Hong Jianping Shi Hankun Hao Fen Luo Luchun Hua Peng Wang Xiaoping Qian Fang Yuan Lianhuan Wei Ming Cui Taiping Zhang Quan Liao Menghua Dai Ziwen Liu Ge Chen Katherine Meckel Sarbani Adhikari Guifang Jia Marc B Bissonnette Xinxiang Zhang Yupei Zhao Wei Zhang Chuan He Jie Liu 2017Cell Research2017,27,10:30
3Chinese Multidisciplinary Expert Consensus on the Diagnosis and Treatment of Hyperuricemia and Related Diseases显示文摘Zou, He-Jian Wu, Hu-Sheng Zhou, Jing-Guo Zeng, Xue-Jun Dai, Lie Wu, Hua-Xiang Zhu, Xiao-Xia Mei, Chang-Lin Hao, Chuan-Ming Chen, Nan Liu, Bi-Cheng Chen, Jiang-Hua Yang, Li Nie, Jing Yu, Chen Peng, Ai Yu, Sheng-Qiang Li, Lin Ge, Jun-Bo Huo, Yong Zhang, Shu-Yang Chen, Yun-Dai Dong, Yu-Gang Liang, Chun Dai, Yu-Xiang Gao, Xin Li, Chang-Gui Zhao, Jia-Jun Chen, Hai-Bing Cheng, Zhi-Feng Lin, Huan-Dong Guan, Yang-Tai Wang, Kai Luo, Ben-Yan Dai, Ruo-Lian Jiang, Quan Xue, Luan Liang, Chao-Chao Chen, Ming Fan, Song 2017Chinese Medical Journal2017,,20:30
4Insights into the role of gut microbiota in obesity: pathogenesis, mechanisms, and therapeutic perspectives显示文摘Lijuan Sun Lanjing Ma Yubo Ma Faming Zhang Changhai Zhao Yongzhan Nie 2018Protein & Cell2018,9,5:29
5Long-term propagation of tree shrew spermatogonial stem cells in culture and successful generation of transgenic offspring显示文摘树鼯有一种靠近的关系到首领并且在生物医学的研究比啮齿类动物有许多优点。然而,基因操作方法的缺乏妨碍了这个动物的更宽的使用。Spermatogonial 干细胞(SSC ) 成功地在文化被扩展了允许复杂基因在老鼠和老鼠编辑。这里,没有干细胞性质的损失,我们为树鼯 SSC 的长期的扩大描述一个文化系统。在我们的学习,胸腺房间抗原 1 被用来充实树鼯 SSC。定序 RNA 分析表明表明小径的 Wnt/-catenin 在无差别的 SSC 是活跃的,但是是在 SSC 区别的开始之上的 downregulated。树鼯的暴露到 recombinant Wnt3a 蛋白质的主要 SSC 在文化的起始的段落期间提高了 SSC 的幸存。当 feeder 被发现为树鼯 SSC 增长必要,树鼯 Sertoli 房间,然而并非老鼠使用胚胎的成纤维细胞,导致柔韧的房间扩大和长期的文化。扩展的树鼯 SSC 是有提高的绿色的 transfected 荧光灯表示 lentiviral 向量的蛋白质(EGFP ) 。在进消毒的成年的男树鼯睾丸的移植以后,标注 EGFP 的 SSC 能恢复精子发生并且成功地产生转基因的后代。而且,这些 SSC 对 CRISPR/Cas9-mediated 基因修正合适。在有编辑的基因的联合的树鼯 SSC 接近膨胀的一个文化系统的发展用树鼯为精确染色体操作铺平道路。Chao-Hui Li Lan-Zhen Yan Wen-Zan Ban Qiu TH Yong Wu Lin Wang Rui Bi Shuang Ji Yu-Hua Ma Wen-Hui Nie Long-Bao Lv Yong-Gang Yao Xu-Dong Zhao Ping Zheng 2017Cell Research2017,27,2:22
6Simulation on dissolute and dust dispersion in comprehensive mechanized heading face with forced-exhaust ventilation显示文摘NIE Wen CHENG Wei-min HAN Li ZHOU Sheng-ju YU Yan-bin ZHAO Shan-shan 2011Journal of Coal Science & Engineering(China)2011,17,3:21
7Toxicity of cadmium and its competition with mineral nutrients for uptake by plants:A review显示文摘Cadmium(Cd)is a toxic heavy metal occurring in the environment naturally and is also generated through various anthropogenic sources and acts as a pollutant.Human health is affected by Cd pollution in farmland soils because food is the main source of Cd intake in the non-smoking population.For crops,Cd toxicity may result from a disturbance in uptake and translocation of mineral nutrients and disturbance in plant metabolism,inhibiting plant growth and development.However,plants have Cd tolerance mechanisms,including restricted Cd uptake,decreased Cd root-to-shoot translocation,enhanced antioxidant enzyme activities,and increased production of phytochelatins.Furthermore,optimal supply of mineral nutrients is one of the strategies to alleviate the damaging effects of Cd on plants and to avoid its entry into the food chain.The emerging molecular knowledge contributes to understanding Cd uptake,translocation,and remobilization in plants.In this review,Cd toxicity and tolerance mechanisms,agricultural practices to minimize Cd accumulation,Cd competition with essential elements(calcium,copper,iron,zinc,and manganese),and genes associated with Cd uptake are discussed in detail,especially regarding how these mineral nutrients and genes play a role in decreasing Cd uptake and accumulation in crop plants.Shiyu QIN Hongen LIU Zhaojun NIE Zed RENGEL Wei GAO Chang LI Peng ZHAO 2020Pedosphere2020,30,2:20
8Precise nanomedicine for intelligent therapy of cancer显示文摘Precise nanomedicine has been extensively explored for efficient cancer imaging and targeted cancer therapy, as evidenced by a few breakthroughs in their preclinical and clinical explorations. Here, we demonstrate the recent advances of intelligent cancer nanomedicine, and discuss the comprehensive understanding of their structure-function relationship for smart and efficient cancer nanomedicine including various imaging and therapeutic applications, as well as nanotoxicity. In particular, a few emerging strategies that have advanced cancer nanomedicine are also highlighted as the emerging focus such as tumor imprisonment, supramolecular chemotherapy, and DNA nanorobot. The challenge and outlook of some scientific and engineering issues are also discussed in future development. We wish to highlight these new progress of precise nanomedicine with the ultimate goal to inspire more successful explorations of intelligent nanoparticles for future clinical translations.Huabing Chen Zhanjun Gu Hongwei An Chunying Chen Jie Chen Ran Cui Siqin Chen Weihai Chen Xuesi Chen Xiaoyuan Chen Zhuo Chen Baoquan Ding Qian Dong Qin Fan Ting Fu Dayong Hou Qiao Jiang Hengte Ke Xiqun Jiang Gang Liu Suping Li Tianyu Li Zhuang Liu Guangjun Nie Muhammad Ovais Daiwen Pang Nasha Qiu Youqing Shen Huayu Tian Chao Wang Hao Wang Ziqi Wang Huaping Xu Jiang-Fei Xu Xiangliang Yang Shuang Zhu Xianchuang Zheng Xianzheng Zhang Yanbing Zhao Weihong Tan Xi Zhang Yuliang Zhao 2018Science China Chemistry2018,61,12:19
9Curculigoside isolated from Curculigo orchioides prevents hydrogen peroxide-induced dysfunction and oxidative damage in calvarial osteoblasts显示文摘反应的氧种类(ROS ) 包括 H2O2,在骨质疏松症的 pathophysiology 起一个关键作用。因此,能禁止 ROS 生产的代理人或抗氧化剂在骨质疏松症的治疗有高临床的价值。Curculigoside (杂种狗) ,酉分的混合物从 Curculigo orchioides Gaertn 的根茎孤立的主要 bioactive 之一,被报导有有势力抗氧化剂和 anti-osteoporotic 性质。然而,没有直接证据与观察 anti-osteoporotic 效果连接杂种狗的抗氧化剂能力,并且相关分子的机制仍然保持不清楚。因此,我们在 calvarial 造骨细胞对氧化应力调查了杂种狗的保护的效果并且讨论了相关机制。造骨细胞生存能力在 48-h 暴露以后显著地减少了到 H2O2 的 400 M,这被发现,与对待车辆的房间相比,并且 H2O2 的细胞毒素的效果显著地被颠倒什么时候有杂种狗的 0.110 M 的 pretreated (P < 0.05 ) 。有杂种狗的 0.110 M 的预告的处理减少了 ROS 生产和类脂化合物 peroxidation,并且增加了抗氧化剂酶的活动,例如 superoxide,在造骨细胞的 dismutase 和谷胱甘肽 peroxidase 由 H2O2 导致了。另外,象碱的磷酸酶,钙免职,和 Runx2 水平那样的区别标记的导致 H2O2 的减小显著地面对杂种狗被恢复。杂种狗也颠倒了细胞外的调整信号的 kinase 1/2,并且原子 factor-B 发信号和 p38 的抑制的导致 H2O2 的刺激激活 mitogen 的蛋白质 kinase 激活。这些结果通过减少 ROS 的生产提供新卓见进杂种狗的造骨细胞保护的机制,建议那条杂种狗可以作为为骨质疏松症和另外的骨头相关的人的疾病的预防和处理的一个对简历安全的代理人被开发。Ying Wang Lu Zhao Yin Wang Jinlong Xu Yah Nie Yuanhui Guo Yongtao Tong Luping Qin Qiaoyan Zhang 2012Acta Biochimica et Biophysica Sinica2012,44,5:15
10Short-term Prognosis of Fragmented QRS Complex in Patients with Non-ST Elevated Acute Myocardial Infarction显示文摘Min Li Xiao Wang Shu-Hua Mi Zhe Chi Qing Chen Xin Zhao Shao-Ping Nie 2016Chinese Medical Journal2016,,5:14
11Eleven COVID-19 Outbreaks with Local Transmissions Caused by the Imported SARS-CoV-2 Delta VOC-China,July-August,2021显示文摘Starting from December 2019,Wuhan,China,encountered the first outbreak of coronavirus disease 2019(COVID-19)(1-2).The epidemic was successfully suppressed by strict containment so that the number of infected people was reduced to 0 on April 8,2020(3–4).After that,China experienced roughly 3 dozen outbreaks with local transmission caused by imported severe acute respiratory syndrome coronavirus 2(SARS-CoV-2).Lei Zhou Kai Nie Hongting Zhao Xiang Zhao Bixiong Ye Ji Wang Cao Chen Hong Wang Jiangli Di Jinsong Li Chao Li Zhixiao Chen Ruiqi Ren Peihua Niu Hui Chen Tao Chen Yali Wang Lili Li Bingxue Han Ruhan A Si Chen Dan Li Dan Li Chunxia Jin Xin Zhang Jiangmei Liu Chunyu Xu Yecheng Yao Yenan Feng Zhili Li Bike Zhang Yang Song Peter Hao Yanping Zhang Hao Li Qun Li George F.Gao Guoqing Shi Wenbo Xu 2021China CDC weekly2021,3,41:13
12Strontium ranelate reduces cartilage degeneration and subchondral bone remodeling in rat osteoarthritis model显示文摘De-gang YU Hui-feng DING Yuan-qing MAO Ming LIU Bo YU Xin ZHAO Xiao-qing WANG Yang LI Guang-wang LIU Shao-bo NIE Shen LIU Zhen-an ZHU 2013Acta Pharmacologica Sinica2013,34,3:13
13Prediction of Primary Climate Variability Modes at the Beijing Climate Center显示文摘Climate variability modes, usually known as primary climate phenomena, are well recognized as the most important predictability sources in subseasonal–interannual climate prediction. This paper begins by reviewing the research and development carried out, and the recent progress made, at the Beijing Climate Center(BCC) in predicting some primary climate variability modes. These include the El Ni?o–Southern Oscillation(ENSO), Madden–Julian Oscillation(MJO), and Arctic Oscillation(AO), on global scales, as well as the sea surface temperature(SST) modes in the Indian Ocean and North Atlantic, western Pacific subtropical high(WPSH), and the East Asian winter and summer monsoons(EAWM and EASM, respectively), on regional scales. Based on its latest climate and statistical models, the BCC has established a climate phenomenon prediction system(CPPS) and completed a hindcast experiment for the period 1991–2014. The performance of the CPPS in predicting such climate variability modes is systematically evaluated. The results show that skillful predictions have been made for ENSO, MJO, the Indian Ocean basin mode, the WPSH, and partly for the EASM, whereas less skillful predictions were made for the Indian Ocean Dipole(IOD) and North Atlantic SST Tripole, and no clear skill at all for the AO, subtropical IOD, and EAWM. Improvements in the prediction of these climate variability modes with low skill need to be achieved by improving the BCC's climate models, developing physically based statistical models as well as correction methods for model predictions.Some of the monitoring/prediction products of the BCC-CPPS are also introduced in this paper.Hong-Li REN Fei-Fei JIN Lianchun SONG Bo LU Ben TIAN Jinqing ZUO Ying LIU Jie WU Chongbo ZHAO Yu NIE Peiqun ZHANG Jin BA Yujie WU Jianghua WAN Yuping YAN Fang ZHOU 2017Journal of Meteorological Research2017,31,1:13
14Medial support nail and proximal femoral nail antirotation in the treatment of reverse obliquity inter-trochanteric fractures(Arbeitsgemeinschaft fur Osteosynthesfrogen/Orthopedic Trauma Association 31-A3.1):a finite-element analysis显示文摘Background:The reverse obliquity inter-trochanteric fracture is a distinct fracture pattern that is mechanically different from most inter-trochanteric fractures and the optional treatment of it is still controversial.The purpose of this study was to compare differences in the efficacy of a novel nail(medial support nail[MSN-II])and proximal femoral nail anti-rotation(PFNA-II)in the treatment of reverse obliquity inter-trochanteric fractures(Arbeitsgemeinschaft fur Osteosynthesfrogen/Orthopedic Trauma Association[AO/OTA]31-A3.1)using finite-element analysis.Methods:Modeling software was used to establish a three-dimensional model of MSN-II and PFNA-II and an A3.1 inter-trochanteric fracture model.Abaqus software was used to implement different force loads to compare finite-element biomechanical parameters such as the maximum stress in implant and the displacement of fracture site.Results:The femoral stress,implant stress and fracture site displacement of MSN-II was less than that of PFNA-II.The results indicated that the maximal femoral stress was 581 MPa for PFNA-II and 443 MPa for the MSN-II.The maximum stress values in the PFNA-II and MSN-II models were 291 and 241 MPa,respectively.The maximal displacements of the fracture site were 1.47 and 1.16 mm in the PFNA-II and MSN-II models,respectively.Conclusions:Compared with PFNA-II for inter-trochanteric fracture(AO/OTA 31-A3.1),MSN-II which was designed with a triangular stability structure can provide better biomechanical stability.The MSN-II may be a feasible option for the treatment of reverse obliquity inter-trochanteric fracture.Shao-Bo Nie Yan-Peng Zhao Jian-Tao Li Zhe Zhao Zhuo Zhang Li-Cheng Zhang Pei-Fu Tang 2020Chinese Medical Journal2020,,22:13
15Expression and Comparative Analysis of Genes Encoding Outer Membrane Proteins LipL21,LipL32 and OmpL1 in Epidemic Leptospires显示文摘Leptospiral 外部膜蛋白质(OMP ) 高度在不同种类被保存,并且在新免疫保护和 serodiagnosis 策略的发展起一个必要作用。编码 LipL21, LipL32 和 OmpL1 的基因从螺旋体 interrogans serovar lai 种类 Lai 的完全的染色体顺序被克隆并且表示了试管内。顺序比较分析表明三基因高度在不同流行 leptospires 之中被保存,包括三主要流行种类螺旋体 interrogans,螺旋体 borgpetersenii 和螺旋体 weilii,在中国。Immunoblot 分析进一步被执行用重组体 OMP 的反时代细看 15 个流行螺旋体参考种类。两免疫污点试金和反向的抄写聚合酶链反应证明这三 OMP 保存地在病原的 L 被表示。interrogans 种类和另外的病原的 leptospires。另外,这些重组体 OMP 的使用作为在为细螺旋体病的 serodiagnosis 的连接酶的免疫吸着剂试金(ELISA ) 的抗原被评估。重组体 LipL32 和 OmpL1 蛋白质与重量的单位显示出 ELISA 反应的高度一感染 L 的 from 病人。interrogans 拉紧 Lai 和另外的病原的 leptospires。这些结果可以贡献宽广范围的疫苗和免疫的候选人的鉴定在进一步的研究的诊断抗原。Xiang-Yan ZHANG Yang YU Ping HE Yi-Xuan ZHANG Bao-Yu HU Yang YANG Yi-Xin NIE Xiu-Gao JIANG Guo-Ping ZHAO Xiao-Kui GUO 2005Acta Biochimica et Biophysica Sinica2005,37,10:12
16Insight-HXMT observations of the first binary neutron star merger GW170817显示文摘Finding the electromagnetic(EM) counterpart of binary compact star merger, especially the binary neutron star(BNS) merger,is critically important for gravitational wave(GW) astronomy, cosmology and fundamental physics. On Aug. 17, 2017,Advanced LIGO and Fermi/GBM independently triggered the first BNS merger, GW170817, and its high energy EM counterpart,GRB 170817 A, respectively, resulting in a global observation campaign covering gamma-ray, X-ray, UV, optical, IR, radio as well as neutrinos. The High Energy X-ray telescope(HE) onboard Insight-HXMT(Hard X-ray Modulation Telescope) is the unique high-energy gamma-ray telescope that monitored the entire GW localization area and especially the optical counterpart(SSS17 a/AT2017 gfo) with very large collection area(~1000 cm^2) and microsecond time resolution in 0.2-5 MeV. In addition,Insight-HXMT quickly implemented a Target of Opportunity(ToO) observation to scan the GW localization area for potential X-ray emission from the GW source. Although Insight-HXMT did not detect any significant high energy(0.2-5 MeV) radiation from GW170817, its observation helped to confirm the unexpected weak and soft nature of GRB 170817 A. Meanwhile,Insight-HXMT/HE provides one of the most stringent constraints(~10^(-7) to 10^(-6) erg/cm^2/s) for both GRB170817 A and any other possible precursor or extended emissions in 0.2-5 MeV, which help us to better understand the properties of EM radiation from this BNS merger. Therefore the observation of Insight-HXMT constitutes an important chapter in the full context of multi-wavelength and multi-messenger observation of this historical GW event.TiPei Li ShaoLin Xiong ShuangNan Zhang FangJun Lu LiMing Song XueLei Cao Zhi Chang Gang Chen Li Chen TianXiang Chen Yong Chen YiBao Chen YuPeng Chen Wei Cui WeiWei Cui JingKang Deng YongWei Dong YuanYuan Du MinXue Fu GuanHua Gao He Gao Min Gao MingYu Ge YuDong Gu Ju Guan ChengCheng Guo DaWei Han Wei Hu Yue Huang Jia Huo ShuMei Jia LuHua Jiang WeiChun Jiang Jing Jin YongJie Jin Bing Li ChengKui Li Gang Li MaoShun Li Wei Li Xian Li XiaoBo Li XuFang Li YanGuo Li ZiJian Li ZhengWei Li XiaoHua Liang JinYuan Liao CongZhan Liu GuoQing Liu HongWei Liu ShaoZhen Liu XiaoJing Liu Yuan Liu YiNong Liu Bo Lu XueFeng Lu Tao Luo Xiang Ma Bin Meng Yi Nang JianYin Nie Ge OU JinLu Qu Na Sai Liang Sun Yin Tan Lian Tao WenHui Tao YouLi Tuo GuoFeng Wang HuanYu Wang Juan Wang WenShuai Wang YuSa Wang XiangYang Wen BoBing WU Mei Wu GuangCheng Xiao He Xu YuPeng Xu LinLi Yan JiaWei Yang Sheng Yang YanJi Yang AiMei Zhang ChunLei Zhang ChengMo Zhang Fan Zhang HongMei Zhang Juan Zhang Qiang Zhang Shu Zhang Tong Zhang Wei Zhang WanChang Zhang WenZhao Zhang Yi Zhang Yue Zhang YiFei Zhang YongJie Zhang Zhao Zhang ZiLiang Zhang HaiSheng Zhao JianLing Zhao XiaoFan Zhao ShiJie Zheng Yue Zhu YuXuan Zhu ChangLin Zou 2018Science China(Physics,Mechanics & Astronomy)2018,61,3:12
17Commercial Application of the Second Generation RHT Catalysts for Hydroprocessing the Residue with Low Sulfur and High Nitrogen Contents显示文摘The RHT technology and the second generation RHT catalysts were applied in design of an 1.7Mt/a VRDS unit at the SINOPEC Changling Branch Co. The commercial application result demonstrated that the RHT catalysts showed good activity and stability in processing low-sulfur and high-nitrogen residue. The first long period run of unit for processing high Fe and high Ca content residue was achieved. The reasons for excessive pressure drop of R-101 were ascribed to Fe and Ca deposition as well as coke formation.Shao Zhicai Zhao Xinqiang Liu Tao Dai Lishun Nie Hong 2014China Petroleum Processing & Petrochemical Technology2014,16,1:11
18Deep learning applied to two-dimensional color Doppler flow imaging ultrasound images significantly improves diagnostic performance in the classification of breast masses:a multicenter study显示文摘Background:The current deep learning diagnosis of breast masses is mainly reflected by the diagnosis of benign and malignant lesions.In China,breast masses are divided into four categories according to the treatment method:inflammatory masses,adenosis,benign tumors,and malignant tumors.These categorizations are important for guiding clinical treatment.In this study,we aimed to develop a convolutional neural network(CNN)for classification of these four breast mass types using ultrasound(US)images.Methods:Taking breast biopsy or pathological examinations as the reference standard,CNNs were used to establish models for the four-way classification of 3623 breast cancer patients from 13 centers.The patients were randomly divided into training and test groups(n=1810 vs.n=1813).Separate models were created for two-dimensional(2D)images only,2D and color Doppler flow imaging(2D-CDFI),and 2D-CDFI and pulsed wave Doppler(2D-CDFI-PW)images.The performance of these three models was compared using sensitivity,specificity,area under receiver operating characteristic curve(AUC),positive(PPV)and negative predictive values(NPV),positive(LR+)and negative likelihood ratios(LR-),and the performance of the 2D model was further compared between masses of different sizes with above statistical indicators,between images from different hospitals with AUC,and with the performance of 37 radiologists.Results:The accuracies of the 2D,2D-CDFI,and 2D-CDFI-PW models on the test set were 87.9%,89.2%,and 88.7%,respectively.The AUCs for classification of benign tumors,malignant tumors,inflammatory masses,and adenosis were 0.90,0.91,0.90,and 0.89,respectively(95%confidence intervals[CIs],0.87-0.91,0.89-0.92,0.87-0.91,and 0.86-0.90).The 2D-CDFI model showed better accuracy(89.2%)on the test set than the 2D(87.9%)and 2D-CDFI-PW(88.7%)models.The 2D model showed accuracy of 81.7%on breast masses≤1 cm and 82.3%on breast masses>1 cm;there was a significant difference between the two groups(P<0.001).The accuracy of the CNN classifications for the test set(89.2%)was significantly higher than that of all the radiologists(30%).Conclusions:The CNN may have high accuracy for classification of US images of breast masses and perform significantly better than human radiologists.Trial registration:Chictr.org,ChiCTR1900021375;http://www.chictr.org.cn/showproj.aspx?proj=33139.Teng-Fei Yu Wen He Cong-Gui Gan Ming-Chang Zhao Qiang Zhu Wei Zhang Hui Wang Yu-Kun Luo Fang Nie Li-Jun Yuan Yong Wang Yan-Li Guo Jian-Jun Yuan Li-Tao Ruan Yi-Cheng Wang Rui-Fang Zhang Hong-Xia Zhang Bin Ning Hai-Man Song Shuai Zheng Yi Li Yang Guang 2021Chinese Medical Journal2021,,4:11
19Tracking Performance of Electric Power Steering System Based on the Mixed H_2/H_∞ Strategy显示文摘The tracking performance of motor current is an important factor that affects the assistance torque of electric power steering (EPS) system. Bad tracking performance will cause assistant torque delay, and make road feeling bad, and is influenced by the input steering torque and system measuring noise. However the existing methods have some shortages on system's robust dynamic performance and robust stability. The mixed H2/H∞ strategy for recirculating ball-type EPS system in a pure electric bus is proposed, and vehicle dynamic model of the system is established. Due to the existence of system model uncertainty, disturbance signals, sensor noises and the demand of system dynamic performance, the indexes of robust performance and road feeling for drivers are defined as the appraisal control objectives. The H∞ method is introduced to design the H∞ controller, and the H2 method is applied to optimize the H∞ controller, thus the mixed H2/H∞ controller is designed. The response of EPS system to the motor current command with amplitude of 20 A, the road disturbance with amplitude of 500 N and the sensor random noise with the amplitude of 1 A is simulated. The simulation results show that the recirculating ball-type EPS system with the mixed H2/H∞ controller can attenuate the random noises and disturbances and track the boost curve well, so the mixed H2/H∞ controller can improve the system's robust performance and dynamic performance. For the purpose of verifying the performance of the designed control strategy, the motor current tracking performance ground tests are conducted with step response input of the steering wheel, double-lane steering test and lemniscate steering test, respectively. The tests show that the mixed H2/H∞ controller for the recirculating ball-type EPS system of pure electric bus is feasible. The designed controller can solve the robust performance and robust stability of the system, thus improve the tracking performance of the EPS system and provide satisfied road feeling for the drivers.ZHAO Wanzhong SHI Guobiao LIN Yi NIE Hong 2011Chinese Journal of Mechanical Engineering2011,24,4:10
20Ovarian tumor-associated microRNA-20a decreases natural killer cell cytotoxicity by downregulating MICA/B expression显示文摘MicroRNAs (miRNAs ) 是小非编码的规章的 RNA 的一个班,并且在 miRNAs 的变化涉及肿瘤起源和前进。研究证明了 miR-20a 是在人的卵巢的癌症纸巾的 overexpressed 并且这 miRNA 提高长期的细胞的增长和侵略能力。在这研究,在浆液 miR-20a 表示和卵巢的癌症舞台之间的积极关联被观察。我们发现 miR-20a 直接绑,导致它的降级并且减少它 MICA/B mRNA 的 -untranslated 区域在血浆膜上铺平的蛋白质 3 ′。膜界限 MICA/B 蛋白质的减小,是 2 成员 D (NKG2D ) 受体在生来的杀手(NK ) 上发现了房间的生来的迷人的组的 ligands, γ δ + T 房间和 CD8 + T 房间,允许肿瘤房间躲避调停免疫者的杀死。尤其是,反对 miR-20a 行动提高了在 vitro 并且在肿瘤的 vivo 模型的在两个的肿瘤房间的调停 NKG2D 的杀死。一起拿,我们的数据显示在肿瘤房间的 miR-20a 的增加的层次可以间接地由 downregulating MICA/B 压制 NK 房间 cytotoxicity 表达式。这些数据提供在转移能力和 NK 房间的肿瘤房间的有免疫力的逃跑之间的一个潜在的连接。Jingyan Xie Mengna Liu Yujuan Li Yunzhong Nie Qiongyu Mi Shuli Zhao 2014Cellular & Molecular Immunology2014,11,5:10
返回顶部 每页显示:
共29页 首页 上一页 第1页 下一页 末页 /29 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费