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170篇 您的检索式:作者名="Xiang Ni"
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1Deep Learning in Medical Ultrasound Analysis: A Review显示文摘Ultrasound (US) has become one of the most commonly performed imaging modalities in clinical practice. It is a rapidly evolving technology with certain advantages and with unique challenges that include low imaging quality and high variability. From the perspective of image analysis, it is essential to develop advanced automatic US image analysis methods to assist in US diagnosis and/or to make such assessment more objective and accurate. Deep learning has recently emerged as the leading machine learning tool in various research fields, and especially in general imaging analysis and computer vision. Deep learning also shows huge potential for various automatic US image analysis tasks. This review first briefly introduces several popular deep learning architectures, and then summarizes and thoroughly discusses their applications in various specific tasks in US image analysis, such as classification, detection, and segmentation. Finally, the open challenges and potential trends of the future application of deep learning in medical US image analysis are discussed.Shengfeng Liu Yi Wang Xin Yang Baiying Lei Li Liu Shawn Xiang Li Dong Ni Tianfu Wang 2019Engineering2019,5,2:24
2Effects of Magnesium and Ferric Ions on Crystallization of Calcium Sulfate Dihydrate Under the Simulated Conditions of Wet Flue-gas Desulfurization显示文摘The influences of magnesium and ferric ions in their different ratios on the rate of gypsum crystallization were studied under the conditions similar to those of wet flue-gas desulfurization(WFGD). The results show that addition of both Mg2+ and Fe3+ increased induction time and decreased the growth efficiency up to 50% compared with the baseline(without impurities) depending on the concentration and the type of impurity. The effects of Mg2+ and Fe3+ on the surface energy and the rate of nucleation were estimated by employing the classical nucleation theory. The surface energy decreased by 8% and 14% with the addition of 0.02 mol/L magnesium or ferric ions, respectively, compared to the baseline. Mg2+ and Fe3+ made the growth rate of the (020), (021) and (040) faces of gypsum crystal a much greater reduction, which leads to the formation of needle crystals compared to the baseline which favors the formation of plate or flakes. Furthermore, an edge detection program was developed to quantify the effects of impurities on the filtration rate of gypsum product. The results show that the inhibition efficiency of the presence of 0.02 mol/L Mg2+ and Fe3+ on the filtration rate of gypsum crystal ranges from 22% to 39%.GAO Xiang HUO Wang ZHONG Yi LUO Zhong-yang CEN Ke-fa NI Ming-jiang CHEN Le-ming 2008Chemical Research in Chinese Universities2008,24,6:16
3MiR-139-5p inhibits migration and invasion of colorectal cancer by downregulating AMFR and NOTCH1显示文摘MicroRNAs (miRNAs ) 由抑制最近在 carcinogenesis 和转移在我们 non-protein-coding RNA 的角色的理解带给卓见的 posttranscriptional 施加功能。在这研究,我们在 CRC 在 colorectal 癌症(CRC ) 和它的潜在的临床的应用程序描述了函数和 miR-139-5p 的分子的机制。我们发现 miR-139-5p 是显著地, CRC 与邻近的 noncancerous 纸巾(NCT ) 相比取样的在 73.8% 的 downregulated,和减少的 miR-139-5p 与穷人被联系预后。功能的分析证明 miR-139-5p 的那个宫外的表达式在 vivo 在 vitro 和转移压制了 CRC 房间移植和侵略。机械学的调查表明 miR-139-5p 由指向 AMFR 和 NOTCH1 压制 CRC 房间侵略和转移。二基因 phenocopied 击倒 CRC 上的 miR-139-5p 的禁止的效果转移。而且,二基因的蛋白质层次与 NCT 相比是在 CRC 样品的 upregulated,并且相反地与 miR-139-5p 表示相关。增加的 NOTCH1 蛋白质表示与 CRC 病人的差的预后被相关。一起,我们的数据显示 miR-139-5p 为 CRC 是潜在的肿瘤 suppressor 和预示的因素,并且指向 miR-139-5p 可以镇压 CRC 的转移并且改善幸存。Mingxu Song Yuan Yin Jiwei Zhang Binbin Zhang Zehua Bian Chao Quan Leyuan Zhou Yaling Hu Qifeng Wang Shujuan Ni Bojian Fei Weili Wang Xiang Du Dong Hua Zhaohui Huang 2014Protein & Cell2014,5,11:14
4Fra-1 protooncogene regulates IL-6 expression in macrophages and promotes the generation of M2d macrophages显示文摘肿瘤微型环境(TME ) 在肿瘤房间的生长起一个突出的作用。作为 TME 的主要煽动性的部件, M2d 巨噬细胞被 TME 教育以便他们采用支持肿瘤转移和前进的一个抑制免疫力的角色。有 6 月的 Fra-1 形式使活跃之物 protein-1 heterodimers 合伙并且驾驶基因抄写。Fra-1 被认为急速地导致 tumorigenesis 和前进。然而,在 M2d 巨噬细胞的产生的 Fra-1 的功能的角色糟糕迄今为止被理解。这里,我们表明那 4T1 乳房的癌房间与 RAW264.7 巨噬细胞房间 co 有教养,扭曲 RAW264.7 巨噬细胞房间区别进 M2d 巨噬细胞。4T1 房间在 RAW264.7 房间,然后 Fra-1 刺激 Fra-1 的 de novo overexpression 绑在 interleukin 6 (IL-6 ) 在 RAW264.7 房间增加 cytokine IL-6 的生产的倡导者。在 autocrine 的 IL-6 幕塑造扭曲 RAW264.7 巨噬细胞房间区别进 M2d 巨噬细胞。这些调查结果开的新卓见进怎么颠倒 M2d 导致巨噬细胞的有免疫力的忍耐改进 immunotherapeutic 途径的功效。Qingshan Wang Hong Ni Lan Lan Xiaoli Wei Rong Xiang Yue Wang 2010Cell Research2010,20,6:12
5Pediatric reference intervals in China(PRINCE):design and rationale for a large,multicenter collaborative cross-sectional study显示文摘There is a lack of accurate pediatric reference intervals(RIs) in China, with most commonly used RIs established without consideration of the effect of age and gender. The Pediatric Reference Intervals in China(PRINCE) project aims to establish and verify pediatric RIs for 31 common laboratory measurands.The project will be a large, multicenter cross-sectional study:14,490 healthy children and adolescents aged up to 19 years will be surveyed by 10 children's hospitals and one pediatric department of a university hospital. To evaluate the feasibility and efficiency of the study methods, 602 children were surveyed in the pilot phase of the PRINCE study in April 2017: it found that some measurands were distinctly age dependent and that there were differences between values for males and females. The results of the pilot study affirmed the necessity of the PRINCE project for Chinese pediatrics. The pilot also indicated potential difficulties in the full survey, e.g., difficulties in recruiting children aged under 3 years and insufficient collection of blood samples from infants. The operation of the PRINCE project has been modified based on the findings in the pilot study toward improving the validity of the PRINCE project and promoting its openness and transparency.Xin Ni Wenqi Song Xiaoxia Peng Ying Shen Yaguang Peng Qiliang Li Yan Wang Lixin Hu Yanying Cai Hong Shang Min Zhao Hong Jiang Yaoguo Huang Runqing Mu Wenxiang Chen Mingting Peng Chuanbao Zhang Jie Zeng Chenbin Li Hongling Yang Yongmei Jiang Jin Xu Guixia Li Hongbing Chen Yun Xiang Sancheng Cao Zhenxin Guo Dapeng Chen 2018Science Bulletin2018,63,24:12
6Microbleeds in fronto-subcortical circuits are predictive of dementia conversion in patients with vascular cognitive impairment but no dementia显示文摘Cerebral small vessel disease(CSVD) is a common etiology of vascular cognitive impairment with no dementia(V-CIND). Studies have revealed that cerebral microbleeds(CMBs), a feature of CSVD, contribute to cognitive impairment. However, the association between CMBs and dementia conversion in individuals with V-CIND is still unclear. Here, we analyzed the predictive role of CMBs in the conversion from V-CIND to dementia in CSVD patients. We recruited and prospectively assessed 85 patients with CSVD and V-CIND. V-CIND was evaluated using a series of comprehensive neuropsychological scales, including the Chinese version of the Montreal Cognitive Assessment and the Clinical Dementia Rating. MRI assessments were used to quantify lacunar infarcts, white matter hyperintensities, CMBs, and medial temporal lobe atrophy. Eighty-two of the 85 patients completed the assessment for dementia conversion at a 1-year follow-up assessment. Multivariate logistic regression analyses were conducted to examine independent clinical and MRI variables associated with dementia conversion. Twenty-four patients(29.3%) had converted to dementia at the 1-year follow-up, and these individuals had significantly more CMBs in the fronto-subcortical circuits. Multivariate logistic regression analyses revealed that the patients with CMBs in the fronto-subcortical circuits(odds ratio = 4.4; 95% confidence interval: 1.602–12.081, P = 0.004) and 5 or more CMBs overall(odds ratio = 17.6, 95% confidence interval: 3.23–95.84, P = 0.001) had a significantly increased risk of dementia at the 1-year follow-up. These findings indicate that CMBs in the fronto-subcortical circuits may be predictive of dementia conversion in CSVD patients with V-CIND, and thus extend the clinical significance of CMBs.Yang-Kun Chen Wei-Min Xiao Wei Li Zhuo-Xin Ni Yong-Lin Liu Li Xu Jian-Feng Qu Chee H.Ng Yu-Tao Xiang 2018Neural Regeneration Research2018,13,11:12
7LORELEI-LIKE GPI-ANCHORED PROTEINS 2/3 Regulate Pollen Tube Growth as Chaperones and Coreceptors for ANXUR/BUPS Receptor Kinases in Arabidopsis显示文摘Pollen tube growth is crucial for successful fertilization.In Arabidopsis thaliana,the ANXUR(ANX)/BUPS receptor kinase complex controls and maintains pollen tube growth in response to autocrine rapid alkalin-ization factor 4/19(RALF4/19)signaling;however,the molecular and cellular mechanisms underlying the ANX/BUPS-mediated regulation of pollen tube growth remain unclear.In this study,we found that pollen-specific LORELEI-like GPI-anchored proteins 2 and 3(LLG2/3)promote pollen tube growth in vitro and in vivo.LLG2/3 interacte with ANX/BUPS in a RALF4-concentration-dependent manner,suggesting that ANX/BUPS and LLG2/3 might form a receptor-coreceptor complex for perceiving RALF peptide signals.Disruption of the ANX/BUPS-LLG2/3 interaction led to the cytoplasmic retention of ANX1/2,in either llg2/3 knockdown mutants or in anx1/2 mutants lacking the J region,which mediates the ANX/BUPS-LLG2/3 interaction.Moreover,we found that RALF4 induced the production of reactive oxygen species(ROS),which stimulate pollen tube growth and reduce pollen burst rate.ROS levels are reduced in the pollen tubes of LLG2/3 RNAi lines,and application of exogenous H2O2 could partially rescue the defective pollen tube growth of LLG2/3 RNAi lines.Taken together,our study identifies LLG2/3 as novel regulatory components of pollen tube growth,and shows that they chaperone ANX/BUPS for secretion to the apical plasma membrane of pollen tube and act as coreceptors of ANX/BUPS in the acti-vation of ROS production for promoting pollen tube growth.Hanqian Feng Chen Liu Rong Fu Minmin Zhang Hui Li Lianping Shen Qiqi Wei Xiang Sun Lin Xu Bin Ni Chao Li 2019Molecular Plant2019,12,12:10
8First dark matter search results from the PandaX-Ⅰ experiment显示文摘We report on the first dark-matter(DM)search results from PandaX-I,a low threshold dual-phase xenon experiment operating at the China JinPing Underground Laboratory.In the 37-kg liquid xenon target with 17.4 live-days of exposure,no DM particle candidate event was found.This result sets a stringent limit for low-mass DM particles and disfavors the interpretation of previously-reported positive experimental results.The minimum upper limit,3.7×10-44cm2,for the spin-independent isoscalar DM-particle-nucleon scattering cross section is obtained at a DM-particle mass of 49 GeV/c2at 90%confidence level.XIAO MengJiao XIAO Xiang ZHAO Li CAO XiGuang CHEN Xun CHEN YunHua CUI XiangYi FANG DeQing FU ChangBo GIBONI Karl L. GONG HaoWei GUO GuoDong HU Jie HUANG XingTao JI XiangDong JU YongLin LEI SiAo LI ShaoLi LIN Qing LIU HuaXuan LIU JiangLai LIU Xiang LORENZON Wolfgang MA YuGang MAO YaJun NI KaiXuan PUSHKIN Kirill REN XiangXiang SCHUBNELL Michael SHEN ManBing STEPHENSON Scott TAN AnDi TARL Greg WANG HongWei WANG JiMin WANG Meng WANG XuMing WANG Zhou WEI YueHuan WU ShiYong XIE PengWei YOU YingHui ZENG XiongHui ZHANG Hua ZHANG Tao ZHU ZhongHua 2014Science China(Physics,Mechanics & Astronomy)2014,57,11:10
9PandaX: a liquid xenon dark matter experiment at CJPL显示文摘PandaX is a large liquid-xenon detector experiment usable for direct dark-matter detection and 136Xe double-beta decay search.The central vessel was designed to accommodate a staged target volume increase from initially 120 kg(stage I)to 0.5 t(stage II)and eventually to a multi-ton scale.The experiment is located in the Jinping Deep-Underground Laboratory in Sichuan,China.The detector operates in dual-phase mode,allowing detection of both prompt scintillation,and ionization charge through proportional scintillation.In this paper a detailed description of the stage I detector design and performance as well as results established during the commissioning phase are presented.CAO XiGuang CHEN Xun CHEN YunHua CUI XiangYi FANG DeQing FU ChangBo GIBONI Karl L. GONG HaoWei GUO GuoDong HE Ming HU Jie HUANG XingTao JI XiangDong JU YongLin LI ShaoLi LIN Qing LIU HuaXuan LIU JiangLai LIU Xiang LORENZON Wolfgang MA YuGang MAO YaJun NI KaiXuan PUSHKIN Kirill REN XiangXiang SCHUBNELL Michael SHEN ManBing SHI YuJie STEPHENSON Scott TAN AnDi TARLé Greg WANG HongWei WANG JiMing WANG Meng WANG XuMing WANG Zhou WEI YueHuan WU ShiYong XIAO MengJiao XIAO Xiang XIE PengWei YE Tao YOU YingHui ZEN XiongHui ZHANG Hua ZHANG Tao ZHAO HaiYing ZHAO Li ZHOU XiaoPeng ZHU ZhongHua 2014Science China(Physics,Mechanics & Astronomy)2014,57,8:9
10Efficacy of maximal androgen blockade versus castration alone in the treatment of advanced prostate cancer: a retrospective clinical experience from a Chinese medical centre显示文摘在这回顾的研究,我们与先进前列腺癌症在中国病人独自评估了并且比较最大的雄激素封锁(MAB ) 对阉割的功效和毒性。从 1996 ~ 2004,有先进前列腺癌症的 608 个病人在学习被包括。病人们回顾地根据不同治疗学的政体被划分成二个组。608 个病人, 300 个病人与 MAB (加 nonsteroidal antiandrogens 的阉割) 并且留下被对待 308 独自与阉割被对待。这些病人的 2 年、 5 年的全面幸存率分别地是 73.7% 和 56% 。Multivariate 分析证明在有变形前列腺癌症的病人, MAB 与没有前进的幸存(PFS ) 的改进被联系不仅(到 10 个月增加了) 而且在死亡风险的 20.6% 减小与阉割相比独自一个。相反, MAB 的功效不比为有 nonmetastatic 前列腺癌症的病人独自一个的阉割优异。在有 MAB 的病人之中,有趣地,那些使用的 bicalutamide 用 flutamide 比那些有更长的 PFS;这是特别在有变形前列腺癌症的病人。几乎所有毒性,由于荷尔蒙,治疗对温和中等、可管理。得出结论在中国,荷尔蒙治疗,包括的 MAB 和阉割独自一个,是为先进前列腺癌症的标准治疗。为有 nonmetastatic 前列腺癌症的病人,阉割可能独自足够地实际、有效。在有变形前列腺癌症的病人,然而, MAB 独自在阉割上有优异功效。MAB 应该与变形前列腺癌症为病人被认为首要的标准治疗,是清楚的。Xue-Qin Chen Ying Huang Xiang Li Peng Zhang Rui Huang Juan Xia Ni Chen Qiang Wei Yu-Chun Zhu Yu-Ru Yang Hao Zeng 2010Asian Journal of Andrology2010,12,5:9
11High entropy rare earth hexaborides/tetraborides(HE REB_(6)/HE REB_(4)) composite powders with enhanced electromagnetic wave absorption performance显示文摘The increasing electromagnetic hazards including electromagnetic interference and electromagnetic pollution,which were stemmed from massive usage of electromagnetic technology,have triggered widespread concerns.To cope with this challenge,electromagnetic wave absorbing materials with high performance are greatly needed.Composite construction has been widely applied in electromagnetic(EM)wave absorbing materials to achieve high permittivity,high permeability and impedance matching.However,high-temperature stability,oxidation and corrosion resistance are still unignorable issues.Herein,high entropy hexaborides/tetraborides(HE REB_(6)/HE REB_(4))composites with synergistic dielectric and magnetic losses were designed and successfully synthesized through a one-step boron carbide reduction method.The five as-prepared(Y_(0.2) Nd_(0.2) Sm_(0.2) Eu_(0.2) Er_(0.2))B_(6)/(Y_(0.2) Nd_(0.2) Sm_(0.2) Eu_(0.2) Er_(0.2))B_(4),(Y_(0.2) Nd_(0.2) Sm_(0.2) Er_(0.2) Yb_(0.2))B_(6)/(Y_(0.2) Nd_(0.2) Sm_(0.2) Er_(0.2) Yb_(0.2))B_(4),(Y_(0.2) Nd_(0.2) Eu_(0.2) Er_(0.2) Yb_(0.2))B_(6)/(Y_(0.2) Nd_(0.2) Eu_(0.2) Er_(0.2) Yb_(0.2))B_(4),(Nd_(0.2) Sm_(0.2) Eu_(0.2) Er_(0.2) Yb_(0.2))B_(6)/(Nd_(0.2) Sm_(0.2) Eu_(0.2) Er_(0.2) Yb_(0.2))B_(4) and(Y_(0.2) Sm_(0.2) Eu_(0.2) Er_(0.2) Yb_(0.2))B_(6)/(Y_(0.2) Sm_(0.2) Eu_(0.2) Er_(0.2) Yb_(0.2))B_(4) contain two phases of HE REB_(6) and HE REB_(4).Among them(Y_(0.2) Nd_(0.2) Sm_(0.2) Eu_(0.2) Er_(0.2))B_(6)/(Y_(0.2) Nd_(0.2) Sm_(0.2) Eu_(0.2) Er_(0.2))B_(4)(HE REB_(6)/HE REB_(4)-1)and(Y_(0.2) Nd_(0.2) Sm_(0.2) Er_(0.2) Yb_(0.2))B_(6)/(Y_(0.2) Nd_(0.2) Sm_(0.2) Er_(0.2) Yb_(0.2))B_(4)(HE REB_(6)/HE REB_(4)-2)exhibit excellent EM wave absorption properties.The optimal minimum reflection loss(RL_(m in))and effective absorption bandwidth(E_(AB))of HE REB_(6)/HE REB_(4)-1 and HE REB_(6)/HE REB_(4)-2 are–53.3 dB(at 1.7 mm),4.2 GHz(at 1.5 mm)and–43.5 dB(1.3 mm),4.2 GHz(1.5 mm),respectively.The combination of conducting HE REB_(4) with magnetism into HE REB_(6) as a second phase enhances dielectric and magnetic losses,which lead to enhanced EM wave absorption performance.Considering superior high-temperature stability,oxidation and corrosion resistance of HE REB_(6) and HE REB_(4),HE REB_(6)/HE REB_(4) composite ceramics are promising as a new type of high-performance EM wave absorbing materials.Weiming Zhang Biao Zhao Na Ni Huimin Xiang Fu-Zhi Dai Shijiang Wu Yanchun Zhou 2021Journal of Materials Science & Technology2021,,28:9
12GABAergic Abnormalities Associated with Sensorimotor Corticostriatal Community Structural Deficits in ErbB4 Knockout Mice and First-Episode Treatment-Naive Patients with Schizophrenia显示文摘The current study was designed to explore how disruption of specific molecular circuits in the cerebral cortex may cause sensorimotor cortico-striatal community structure deficits in both a mouse model and patients with schizophrenia.We used prepulse inhibition(PPI)and brain structural and diffusion MRI scans in 23 mice with conditional ErbB4 knockout in parvalbumin interneurons and 27 matched controls.Quantitative real-time PCR was used to assess the differential levels of GABA-related transcripts in brain regions.Concurrently,we measured structural and diffusion MRI and the cumulative contribution of risk alleles in the GABA pathway genes in firstepisode treatment-naı¨ve schizophrenic patients(n=117)and in age-and sex-matched healthy controls(n=86).We present the first evidence of gray and white matter impairment of right sensorimotor cortico-striatal networks and reproduced the sensorimotor gating deficit in a mouse model of schizophrenia.Significant correlations between gray matter volumes(GMVs)in the somatosensory cortex and PPI as well as glutamate decarboxylase 1 mRNA expression were found in controls but not in knockout mice.Furthermore,these findings were confirmed in a human sample in which we found significantly decreased gray and white matter in sensorimotor cortico-striatal networks in schizophrenic patients.The psychiatric risk alleles of the GABA pathway also displayed a significant negative correlation with the GMVs of the somatosensory cortex in patients.Our study identified that ErbB4 ablation in parvalbumin interneurons induced GABAergic dysregulation,providing valuable mechanistic insights into the sensorimotor cortico-striatal community structure deficits associated with schizophrenia.Chengcheng Zhang Peiyan Ni Yikang Liu Yang Tian Jinxue Wei Bo Xiang Liansheng Zhao Xiaojing Li Xiaohong Ma Wei Deng Wanjun Guo Rongjun Ni Yamin Zhang Qiang Wang Hailiang Huang Nanyin Zhang Tao Li 2020Neuroscience Bulletin2020,36,2:9
13Impacts of algal blooms removal by chitosan-modified soils on zooplankton community in Taihu Lake,China显示文摘It is important to assess the eflect on zooplankton when perform the environmental protection or restoration technology,especially removing algal blooms,because algae were the major primary producer in algal lakes.The influence on zooplankton community after half a year of algal blooms removed by chitosan-modified soils in Taihu Lake was assessed and the rationality of carrying out the process semiannually was evaluated in the present study.Morphological composition and genetic diversity of zooplankton community were investigated by microscope checkup and polymerase chain reaction-denatured gradient gel electrophoresis(PCR-DGGE) .A total of 44 zooplankton taxa(23 protozoa,17 rotifers,3 copepoda and 1 cladocera) were detected by microscope checkup,and a total of 91 bands(28 bands amplified by primers F1427-GC and R1616,63 bands amplified by primers Fung-GC and NS1) were detected by PCR-DGGE.The results of cluster analysis or detrended correspondence analysis indicated that there was no considerable diflerence in morphological composition of zooplankton and DGGE profiles between experimental and control sites,and DGGE profiles could represent the biologic diversity.The study showed that zooplankton community could recover original condition after half year of algal blooms removed by chitosan-modified soils and it was acceptable to apply this process semiannually.In addition,the results revealed that PCR-DGGE could be applied to investigate the impacts of the environmental protection or restoration engineering on zooplankton community diversity.Jiajia Ni Yuhe Yu Weisong Feng Qingyun Yan Gang Pan Bo Yang Xiang Zhang Xuemei Li 2010Journal of Environmental Sciences2010,22,10:8
14A Cluster Based Feature Selection Method for Cross-Project Software Defect Prediction显示文摘从外部来源软件的标记的数据投射在目标补偿有用数据的缺乏的跨工程的缺点预言(CPDP ) 使用投射,以便造一个有意义的分类模型。然而,在从来源和目标工程提取的软件特征之间的分发差距可能太大,不能为训练使混合数据有用。在这份报纸,我们建议基于簇的新奇方法 FeSCH (用簇的特征选择混合数据) 由特征选择减轻分发差别。FeSCH 包括二个阶段。用一个基于密度的聚类方法聚类阶段簇特征的特征,和特征选择分阶段执行用评价策略从每簇选择特征。为 CPDP,我们在第二个阶段设计三不同启发式的评价策略。调查 FeSCH 的预言性能,我们基于真实世界的软件工程设计实验,并且学习在 FeSCH 的设计选择的效果(例如评价策略,特征选择比率,和分类器) 。试验性的结果证明 FeSCH 的有效性。与最先进的基线方法相比,第一, FeSCH 完成更好的性能,它的表演是使用的分类器影响的更少。第二, FeSCH 由有效地越过特征范畴选择特征提高表演,并且为为缺点预言选择有用特征提供指南。Chao Ni Wang-Shu Liu Xiang Chen Qing Gu Dao-Xu Chen Qi-Guo Huang 2017Journal of Computer Science & Technology2017,32,6:7
15Molecular Characterization and Correlation with β-lactam Resistance of Streptococcus pneumonia Isolates in Hangzhou,China显示文摘Penicillin-binding proteins(PBPs) are the target of β-lactam antibiotics(the major treatment for Streptococcus pneumoniae infections),and mutations in PBPs are considered as a primary mechanism for the development of β-lactam resistance in S.pneumoniae.This study was conducted to investigate the mutations in the PBPs of clinical S.pneumoniae isolates in Hangzhou,China,in correlation with β-lactam resistance.Results showed that 19 F was the predominant serotype(7/27) and 14 of the S.pneumoniae isolates were resistant to both penicillin G and cephalosporin.Genotyping results suggested that β-lactam-resistant isolates primarily exhibited single-site mutations in both the STMK and SRNVP motifs of pbp1 a in combination with double-site mutations in the STMK motif of pbp2 x,which might be the primary mechanisms underlying the β-lactam resistance of the isolates in this study.chu mei fen liu xiao xiang zhang shao ni huang yan ying du peng wang li fang ji lei yan jie sun ai hua 2018Biomedical and Environmental Sciences2018,31,5:7
16Melatonin enhances salt tolerance by promoting MYB108A-mediated ethylene biosynthesis in grapevines显示文摘The signal molecules melatonin and ethylene play key roles in abiotic stress tolerance.The interplay between melatonin and ethylene in regulating salt tolerance and the underlying molecular mechanism of this interplay remain unclear.Here,we found that both melatonin and 1-aminocyclopropane-1-carboxylic acid(ACC,a precursor of ethylene)enhanced the tolerance of grapevine to NaCl;additionally,ethylene participated in melatonin-induced salt tolerance.Further experiments indicated that exogenous treatment and endogenous induction of melatonin increased the ACC content and ethylene production in grapevine and tobacco plants,respectively.The expression of MYB108A and ACS1,which function as a transcription factor and a key gene involved in ethylene production,respectively,was strongly induced by melatonin treatment.Additionally,MYB108A directly bound to the promoter of ACS1 and activated its transcription.MYB108A expression promoted ACC synthesis and ethylene production by activating ACS1 expression in response to melatonin treatment.The suppression of MYB108A expression partially limited the effect of melatonin on the induction of ethylene production and reduced melatonin-induced salt tolerance.Collectively,melatonin promotes ethylene biosynthesis and salt tolerance through the regulation of ACS1 by MYB108A.Lili Xu Guangqing Xiang Qinghua Sun Yong Ni Zhongxin Jin Shiwei Gao Yuxin Yao 2019Horticulture Research2019,6,1:7
17Construction of a Plant Transformation-ready Expression cDNA Library for Thellungiella halophila Using Recombination Cloning显示文摘盐十字花科植物(Thellungiella halophila ) ,模型的近亲种 Arabidopsis thaliana L. ,是被使适应严厉盐的环境的 extremophile。到我的从这种的咸忍耐的基因,我们从对待与的盐十字花科植物工厂构造了一个入口 cDNA 图书馆由使用修改 cDNA 合成和完全没有操作正在包含限制酶和脱氧核糖核酸连接酶的一个改进帮助再结合的 cDNA 图书馆构造方法咸压力。这个 cDNA 图书馆构造过程显著地被简化, cDNA 图书馆的质量被改进。这个入口 cDNA 图书馆是随后,进目的地二进制代码向量 pCB406 的 shuttled 经由帮助再结合的克隆为工厂转变和表示设计了。图书馆是准备好了的工厂转变并且被用来在大规模上转变 Arabidopsis 以便为功能的基因采矿创造转基因的线的一个大集合。Wan-Song Ni Zhi-Yong Lei Xi Chen David J. Oliver Cheng-Bin Xiang 2007Journal of Integrative Plant Biology2007,49,9:6
18Reconstruction of different scales of pore-fractures network of coal reservoir and its permeability prediction with Monte Carlo method显示文摘There are millimeter, micron and nanometer scales of pores and fractures in coal to describe different scales of coal pores and fissures communicating path and to quantitatively characterize their permeability. Such information provides an important basis for studying coalbed methane output mechanism. The pores and fissures in a large number of coal samples were observed and counted by scanning electron microscopy and optical microscopy. The probability distribution models of pore-fissure network were then established. Different scales of pore-fissures 2D network models were reconstructed by Monte Carlo method. The 2D seepage models were obtained through assignment zero method and using Matlab software. The effect of permeability on different scale pore-fractures network was obtained by two-dimensional seepage equation. Predicted permeability is compared with the measured ones. The results showed that the dominant order of different scale pore-fractures connected path from high to low is millimeter-sized fractures, seepage pores and micron-size fractures. The contribution of coal reservoir permeability from large to small is millimeter-size fractures, micron-size fractures and seepage pores. Different parameters in different scale pore-fractures are of different influence permeability.Reconstruction of different scale pore-fractures network can clearly display the connectivity of porefractures, which can provide a basis for selecting migration path and studying gas flow pattern.Ni Xiaoming Chen Wenxue Li Zheyuan Gao Xiang 2017International Journal of Mining Science and Technology2017,27,4:5
19Characteristics of Tight Sandstone Reservoirs and Controls of Reservoir Quality: A Case Study of He 8 Sandstones in the Linxing Area, Eastern Ordos Basin, China显示文摘Determining the process of densification and tectonic evolution of tight sandstone can help to understand the distribution of reservoirs and find relatively high-permeability areas.Based on integrated approaches of thin section,scanning electron microscopy(SEM),cathode luminescence(CL),nuclear magnetic resonance(NMR),X-ray diffraction(XRD),N2 porosity and permeability,micro-resistivity imaging log(MIL)and three-dimensional seismic data analysis,this work discussed the reservoir characteristics of the member 8 of the Permian Xiashihezi Formation(He 8 sandstones)in the Linxing area of eastern Ordos Basin,determined the factors affecting reservoir quality,and revealed the formation mechanism of relatively high-permeability areas.The results show that the He 8 sandstones in the Linxing area are mainly composed of feldspathic litharenites,and are typical tight sandstones(with porosity<10%and permeability<1 mD accounting for 80.3%of the total samples).Rapid burial is the main reason for reservoir densification,which resulted in 61%loss of the primary porosity.In this process,quartz protected the original porosity by resisting compaction.The cementation(including carbonate,clay mineral and siliceous cementation)further densified the sandstone reservoirs,reducing the primary porosity with an average value of 28%.The calcite formed in the eodiagenesis occupied intergranular pores and affected the formation of the secondary pores by preventing the later fluid intrusion,and the Fe-calcite formed in the mesodiagenetic stage densified the sandstones further by filling the residual intergranular pores.The clay minerals show negative effects on reservoir quality,however,the chlorite coatings protected the original porosity by preventing the overgrowth of quartz.The dissolution of feldspars provides extensive intergranular pores which constitute the main pore type,and improves the reservoir quality.The tectonic movements play an important role in improving the reservoir quality.The current tectonic traces of the study area are mainly controlled by the Himalayan movement,and the high-permeability reservoirs are mainly distributed in the anticline areas.Additionally,the improvement degree(by tectonic movements)of reservoir quality is partly controlled by the original composition of the sandstones.Thus,the selection of potential tight gas well locations in the study area should be focused on the anticline areas with relatively good original reservoir quality.And the phenomena can be referenced for other fluvial tight sandstone basins worldwide.GAO Xiangdong WANG Yanbin LI Yong GUO Hui NI Xiaoming WU Xiang ZHAO Shihu 2019Acta Geologica Sinica(English Edition)2019,93,3:5
20Landscape structure and land uese on county level in northeastern Yunnan Province of China——a case study of Huize County显示文摘Taking Huize County as an example, the paper analyzed the landscape structure(landscape element structure, landscape type structure, landscape spatial structure, landscape succession structure) and the relations between landscape structure and land use. It was pointed out that the agriculture should be developed in harmony with the landscape structure in the study area.WANG Jin\|liang, NI Shao\|xiang (College of Geographical Science, Nanjing Normal University, Nanjing 210097, China) 2000Journal of Environmental Sciences2000,12,3:5
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