|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | A language-independent neural network for event detection显示文摘Event detection remains a challenge because of the difficulty of encoding the word semantics in various contexts. Previous approaches have heavily depended on language-specific knowledge and preexisting natural language processing tools. However, not all languages have such resources and tools available compared with English language. A more promising approach is to automatically learn effective features from data, without relying on language-specific resources. In this study, we develop a language-independent neural network to capture both sequence and chunk information from specific contexts and use them to train an event detector for multiple languages without any manually encoded features. Experiments show that our approach can achieve robust, efficient and accurate results for various languages. In the ACE 2005 English event detection task, our approach achieved a 73.4% F-score with an average of 3.0% absolute improvement compared with state-of-the-art. Additionally, our experimental results are competitive for Chinese and Spanish. | Xiaocheng FENG Bing QIN Ting LIU | 2018 | Science China(Information Sciences)2018，61，9： | 42 |
| 2 | Construction of habitat suitability models(HSMs) for benthic macroinvertebrate and their applications to instream environmental flows:A case study in Xiangxi River of Three Gorges Reservior region,China显示文摘Based on a long-term ecological monitoring, the present study chose the most dominant benthic macroinvertebrate (Baetis spp.) as tar- get organisms in Xiangxi River, built the habitat suitability models (HSMs) for water depth, current velocity and substrate, respectively, which is the first aquatic organisms model for habitat suitability in the Chinese Mainland with a long-term consecutive in situ measurement. In order to protect the biointegrity and function of the river ecosystem, the theory system of instream environmental flow should be cat- egorized into three hierarchies, namely minimum required instream flow (hydrological level), minimum instream environmental flow (bio- species level), and optimum instream environmental flow (ecosystem level). These three hierarchies of instream environmental flow models were then constructed with the hydrological and weighted usable area (WUA) method. The results show that the minimum required instream flow of Xiangxi River calculated by the Tennant method (10% of the mean annual flow) was 0.615 m3 s 1; the minimum instream environmental flow accounted for 19.22% of the mean annual flow (namely 1.182 m3 s 1), which was the damaged river channel flow in the dry season; and 42.91% of the mean annual flow (namely 2.639 m3 s 1) should be viewed as the optimum instream environmental flow in order to protect the health of the river ecosystem, maintain the instream biodiversity, and reduce the impact of small hydropower stations nearby the Xiangxi River. We recommend that the hydrological and biological methods can help establish better instream environmental flow models and design best management practices for use in the small hydropower station project. | Fengqing Li Qinghua Cai Xiaocheng Fu Jiankang Liu | 2009 | Progress in Natural Science:Materials International2009，19，3： | 18 |
| 3 | Magnetohydrodynamics (MHD) numerical simulations on the interaction of the solar wind with the magnetosphere: A review显示文摘The magnetosphere is the outermost layer of the geospace, and the interaction of the solar wind with the magnetosphere is the key element of the space weather cause-and-effect chain process from the Sun to Earth, which is one of the most challenging scientific problems in the geospace weather study. The nonlinearity, multiple component, and time-dependent nature of the geospace make it very difficult to describe the physical process in geospace using traditional analytic analysis approach. Numerical simulations, a new research tool developed in recent decades, have a deep impact on the theory and application of the geospace. MHD simulations started at the end of the 1970s, and the initial study was limited to two-dimensional (2D) cases. Due to the intrinsic three-dimensional (3D) characteristics of the geospace, 3D MHD simulations emerged in the 1980s, in an attempt to model the large-scale structures and fundamental physical processes in the magnetosphere. They started to combine with the space exploration missions in the 1990s and make comparisons with observations. Physics-based space weather forecast models started to be developed in the 21st century. Currently only a few space-power countries such as USA and Japan have developed 3D magnetospheric MHD models. With the rapid advance of space science in China, we have developed a new global MHD model, namely PPMLR-MHD, which has high order spatial accuracy and low numerical dissipation. In this review, we will briefly introduce the global 3D MHD modeling, especially the PPMLR-MHD code, and summarize our recent work based on the PPMLR-MHD model, with an emphasis on the interaction of interplanetary shocks with the magnetosphere, large-scale current systems, reconnection voltage and transpolar potential drop, and Kelvin-Helmholtz (K-H) instability at the magnetopause. | WANG Chi GUO XiaoCheng PENG Zhong TANG BinBin SUN TianRan LI WenYa HU YouQiu | 2013 | Science China Earth Sciences2013，56，7： | 10 |
| 4 | Isotope Chronology and Geochemistry of the Lower Carboniferous Granite in Xilinhot, Inner Mongolia, China显示文摘Geochronological and geochemical analyses were performed on K-feldspar granites and monzonitic granites from the Xilinhot area, Inner Mongolia, China. Zircon U/Pb ages indicate that the two types granites were emplaced during the Lower Carboniferous. The K-feldspar granites(332 Ma) have the typical A-type granite characteristics of a post-collision setting. The monzonitic granites have an emplacement age of 323 Ma. Zircon εHf values of the former range from +12.8 to +14.2, with an average T_(DM2) of 453 Ma. The latter have lower zircon ε_(Hf) values, ranging from +5.4 to +10.7, with an average T_(DM2) of 798 Ma. The strong, positive ε_(Hf) values of the zircon indicate that both sets of samples are from a juvenile crust formed in an oceanic crust subduction stage, although the monzonitic granite may have undergone a hybridization of crustal materials. These results indicate a younger post orogenic event. The Paleo-Asian Ocean had closed before the Early Carboniferous and the Xilinhot area started its post-orogenic evolution with an extensional tectonic environment during the Early Carboniferous. | Xiaocheng Zhao Wenxiao Zhou Dong Fu Bo Huang Mengchun Ge | 2018 | Journal of Earth Science2018，29，2： | 8 |
| 5 | Geochemical characteristics of soil gas in the Yanhuai basin,northern China显示文摘The geochemical backgrounds and origins of soil gases in the Yanhuai basin are discussed based on the regional seismogeological data and concentrations of Rn,Hg,CO2,H2,He and CH4 in soil gas measured at 422 investigating sites in field during September to October 2007.The geochemical background values of Rn,Hg,CO2,H2,He and CH4 are(8105.8±5937.4) Bq/m3,(9.7±5.8) ng/m3,(395.9±35.3)×10-6,(4.0±2.3)×10-6,(15.9±10.4)×10-6 and(12.7±8.1)×10-6,respectively.The geochemical backgrounds of the soil gases are higher in the eastern part of the Yanhuai basin.The main factors affecting the gasgeochemical backgrounds are gaseous origins,structure of the crust,faults,stratum and microbe activity.The higher values of gasgeochemical backgrounds in the eastern part are attributed to the existence of low-velocity zones in the upper crust,stronger tectonic activity and more contributions of Hg and He derived from the deep-earth and Rn origi-nated from granite,corresponding to stronger seismic activity.The results can be applied to identifying seismic precursor from monitoring data of gases in the studied area. | Ying Li Jianguo Du Fukuan Wang Xiaocheng Zhou Xiaodong Pan Ruqing Wei | 2009 | Earthquake Science2009，22，1： | 7 |
| 6 | 8-Bromo-7-methoxychrysin-blocked STAT3/ Twist axis inhibits the sternness of cancer stem cell-like cell originated from SMMC-7721 cells显示文摘抄写 3 的信号变换器和使活跃之物(STAT3 ) 是能调整房间增长,幸存,和开发的潜伏的细胞质的 transcriptional 因素的家庭的一个成员。扭曲是 STAT3 的目标基因,这被报导了,并且发信号的 STAT3/Twist 在调整癌症进步起一个重要作用。这里,探索 8-bromo-7-methoxychrysin (BrMC ) 是否禁止肝癌症经由破坏 STAT3/Twist 发信号的像茎的房间(LCSLC ) 性质,我们在 vitro 的有教养的 SMMC-7721 房间,并且由决定形成范围的能力和迁居在球状体的 stemness 上评估了 BrMC 的效果。范围形成试金结果在 LCSLC 显示出形成范围的能力的集中依赖者减少(P < 0.05 ) 与 BrMC 的不同集中对待。愈合创伤的试金结果在与 BrMC 的不同集中对待的 LCSLC 的房间移植表明了集中依赖者衰落。另外, CD133, CD44,和 ALDH1 层次在与 BrMC 对待的 LCSLC 被减少。有 BrMC 的不同集中的治疗也减少了 p-STAT3 和 Twist1 蛋白质的表情。BrMC 的效果被合作处理实质地与 JSI-124 提高, STAT3 的一个特定的禁止者。Twist1 的宫外的表示在 LCSLC 在标记的范围形成,移植,和表示上稀释了 BrMC 的禁止的效果。然而,它不有在 LCSLC 在 p-STAT3 上影响表示。这些结果证明 BrMC 禁止 LCSLC 的 stemness 由禁止 STAT3/Twist 从 SMMC-7721 房间线发源信号轴。 | Yimin Luo Yinghong Cui Xiaocheng Cao Xiang Li A Chen Jiansong Zhang Xiangding Chen Jianguo Cao | 2017 | Acta Biochimica et Biophysica Sinica2017，49，5： | 7 |
| 7 | miR164c and miR168a regulate seed vigor in rice^∞显示文摘Micro RNAs(miRNAs)are key regulators of gene expression in many important biological processes of plants.However,few miRNAs have been shown to regulate seed vigor.Here,we conducted microarray assays to analyze miRNA expression levels in seeds of the rice(Oryza sativa L.)cultivar ZR02.Results showed significant differences in the expression of 11 miRNAs between artificially aged and untreated control seeds.Among these,osa-miR164c was transcriptionally upregulated,while osamiR168 a was downregulated in artificially aged seeds;this was verified by quantitative real-time PCR analysis.Under the same aging condition,osa-miR164c overexpression in OE164c transgenic seeds and osa-miR168a silencing in MIM168a transgenic seeds of the rice cultivar Kasalath led to lower germination rates,whereas osa-miR164c silencing Rin MIM164c and osa-miR168a overexpression in OE168a resulted in higher seed germination rates compared with wild-type seeds.Meanwhile,changes in cytomembrane permeability of seeds and in the expression level of osa-miR164c target genes(OsPM27 and OsPSK5)and osamiR168a target genes(OsAGO1 and OsPTR2)under aging conditions coincided with changes in seed vigor induced by osa-miR164c and osa-miR168 a.Thus,genetic manipulation of miRNAs has important implications in the development of crop cultivars with high vigor and extended life span of seeds. | Yan Zhou Shiqi Zhou Liping Wang Duo Wu Hailan Cheng Xu Du Dandan Mao Chunlai Zhang Xiaocheng Jiang | 2020 | Journal of Integrative Plant Biology2020，62，4： | 7 |
| 8 | Fault detection for nonlinear networked control systems based on fuzzy observer显示文摘Security and reliability must be focused on control systems firstly, and fault detection and diagnosis (FDD) is the main theory and technology. Now, there are many positive results in FDD for linear networked control systems (LNCSs), but nonlinear networked control systems (NNCSs) are less involved. Based on the T-S fuzzy-modeling theory, NNCSs are modeled and network random time-delays are changed into the unknown bounded uncertain part without changing its structure. Then a fuzzy state observer is designed and an observer-based fault detection approach for an NNCS is presented. The main results are given and the relative theories are proved in detail. Finally, some simulation results are given and demonstrate the proposed method is effective. | Zhangqing Zhu Xiaocheng Jiao | 2012 | Journal of Systems Engineering and Electronics2012，23，1： | 6 |
| 9 | A nonsynonymous SNP in human cytosolic sialidase in a small Asian population results in reduced enzyme activity: potential link with severe adverse reactions to oseltamivir显示文摘oseltamivir 的使用,广泛地是的 stockpiled 为在可能的鸟的流行性感冒的使用的药之一流行,被报导了与 neuropsychiatricdisorders 和严重皮肤反应被联系,首先在日本。这里,我们在 dbSNP 数据库识别了非同义的 SNP (单个核苷酸多型性) , R41Q 在 humancytosolic sialidase 的酶的活跃地点附近,是 oseltamivir 的目标的病毒 neuraminidase 的一个相当或相同事物。在欧洲、非洲的美国人口的 9.29% 亚洲人口和没有的这 SNPoccurred。Ourstructural 分析和 Ki 大小使用试管内 sialidase 试金显示这 SNPcould 增加人的 sialidase 的非计划中的有约束力的亲密关系到 oseltamivir 羧化物, oseltamivir 的活跃形式,因此减少 sialidase 活动。另外,这 SNP 自己与一项内在地更低的 sialidase 活动导致酶,由它的增加的 Km 证明 Vmax 珍视并且减少。理论上,到有这 SNP 的人的 oseltamivir 的管理可能进一步减少他们的 sialidase 活动。我们注意 oseltamivir 的 reportedneuropsychiatric 副酌和人的 sialidase-relateddisorders 的已知的症状的类似。我们建议这个充实亚洲人的 sialidase 变化由 SNP 引起了,在同型结合的形式可能,可以与对 oseltamivir 的某些严重不利反应被联系。 | Chuan-Yun Li Quan Yu Zhi-Qiang Ye Ying Sun Quanyuan He Xiao-Mo Li Wuxue Zhang Jingchu Luo Xiaocheng Gu Xiaofeng Zheng Liping Wei | 2007 | Cell Research2007，17，4： | 5 |
| 10 | EXPERIMENTAL INVESTIGATION OF TIP CLEARANCE FLOW FOR AN AXIAL FLOW FAN ROTOR显示文摘在一个轴的通风迷的尖端区域的流动域与在设计的系统调节的粒子图象速度计(PIV ) 被调查。有三个不同尖端清理的流动地分别地在三架不同环绕的飞机上被调查。锁 Thephase 的平均方法被用来调查产生和一个尖端漏旋涡的发展。从 PIV 系统的结果从一张粒子动力学风速表(PDA ) 与那相比是系统。两个数据在好同意,为转子的尖端漏旋涡的结构被说明。一个漏旋涡的特征在速度向量和旋涡的轮廓被描述。漏旋涡的摇摆和旋涡的位置详细被调查,它解释在数字模拟之间的差异, PDAexperimental 结果到某个程度。在不同时间的尖端漏旋涡的中心 loci 和漏旋涡的吝啬的中心 loci 特别地被显示。最后,当适当地解释了时,由试验性的测量的尖端漏旋涡的轨道与从为高速度和高压的压缩机和汽轮机的存在模型的预言相比。一个好协议被获得。 | GUO Qiang ZHU Xiaocheng DU Zhaohui | 2006 | Chinese Journal of Mechanical Engineering2006，19，3： | 5 |
| 11 | Numerical study on the response of the Earth's magnetosphere-ionosphere system to a super solar storm显示文摘With the approaching of the 24th solar cycle peak year (2012-2014), the impacts of super solar storms on the geospace environment have drawn attentions. Based on the geomagnetic field observations during Carrington event in 1859, we estimate the interplanetary solar wind conditions at that time, and investigate the response of the magnetosphere-ionosphere system to this extreme solar wind conditions using global 3D MHD simulations. The main findings include: 1) The day-side magnetopause and bow shock are compressed to 4.3 and 6.0 Re (Earth radius), and their flanks are also strongly compressed. The magnetopause shifts inside the geosynchronous orbit, exposing geosynchronous satellites in the solar wind in the magnetosheath. 2) During the storm, the region-1 current increases by about 60 times, and the cross polar potential drop increases by about 80 times; the reconnection voltage is about 5 to 6 times larger than the average storms, which means a larger amount of the solar wind energy enters the magnetosphere, resulting in strong space weather phenomena. | WANGChi LI Hui GUO XiaoCheng DING Kai HUANG ZhaoHui | 2012 | Science China Earth Sciences2012，55，6： | 3 |
| 12 | Integrated Maintenance Information System and its Applications显示文摘Based on the detailed analysis for the process of modern aviation maintenance and its technical information support, this paper describes the maintenance information as an integrated one with hierarchical feature, and presents the concept, principle, and the architecture of Integrated Maintenance Information System (IMIS). Finally, this paper discusses some promising functions on the environment of integrated maintenance information, including the interactive electronic technical manuals, dynamic diagnostic aids, remote parts orders and maintenance management decision-making, etc. | Wu Songlin Wang Xiaocheng Zhang Fengming | 2000 | International Journal of Plant Engineering and Management2000，5，3： | 2 |
| 13 | Multi-Level Cross-Lingual Attentive Neural Architecture for Low Resource Name Tagging显示文摘Neural networks have been widely used for English name tagging and have delivered state-of-the-art results. However, for low resource languages, due to the limited resources and lack of training data, taggers tend to have lower performance, in comparison to the English language. In this paper, we tackle this challenging issue by incorporating multi-level cross-lingual knowledge as attention into a neural architecture, which guides low resource name tagging to achieve a better performance. Specifically, we regard entity type distribution as language independent and use bilingual lexicons to bridge cross-lingual semantic mapping. Then, we jointly apply word-level cross-lingual mutual influence and entity-type level monolingual word distributions to enhance low resource name tagging. Experiments on three languages demonstrate the effectiveness of this neural architecture: for Chinese,Uzbek, and Turkish, we are able to yield significant improvements in name tagging over all previous baselines. | Xiaocheng Feng Lifu Huang Bing Qin Ying Lin Heng Ji Ting Liu | 2017 | Tsinghua Science and Technology2017，22，6： | 2 |
| 14 | Minimum Structural Similarity Distortion for Reversible Data Hiding显示文摘Until now, most Reversible data hiding(RDH) techniques have been evaluated by Peak signal-tonoise ratio(PSNR), which based on Mean squared error(MSE). Unfortunately, MSE turns out to be an extremely poor measure when the purpose is to predict perceived signal fidelity or quality. The Structural similarity(SSIM)index has gained widespread popularity as an alternative motivating principle for the design of image quality measures. How to utilize the characterize of SSIM to design RDH algorithm is very critical. We propose an optimal RDH algorithm under structural similarity constraint. We deduce the metric of the structural similarity constraint,and further we prove it does not hold Non-crossing-edges(NCE) property. We construct the rate-distortion function of optimal structural similarity constraint, which is equivalent to minimize the average distortion for a given embedding rate, and then we can obtain the optimal transition probability matrix under the structural similarity constraint. Experiments show that our proposed method can be used to improve the performance of previous RDH schemes evaluated by SSIM. | XU Jiajia ZHANG Weiming JIANG Ruiqi YU Nenghai HU Xiaocheng | 2018 | Chinese Journal of Electronics2018，27，3： | 2 |
| 15 | Ray Wu and the CUSBEA Program显示文摘I first met Dr Ray Wu in the late seventies of the last century, when China was beginning to re-engage with the western world. Deng Xiaoping laid out a bold, ambitious plan for the country to rapidly modernize. To realize this plan, China would need a new kind of work force. The responsi-bility fell upon the Ministry of Education to find the brightest young minds in China and to dispatch them to 'scientifically advanced western countries' for post-graduate studies. | Xiaocheng Gu | 2009 | Science China(Life Sciences)2009，52，2： | 2 |
| 16 | Experimental study to confirm the existence of hydrocarbon under high pressure and temperature of deep lithosphere显示文摘Pyrolysis of lignite was conducted at high temperatures from 400 to 700℃ and high pres- sures of 1 and 3 GPa in a closed system in order to investigate pressure and temperature effects on or- ganic matter maturation. The data indicated that the total yield of liquid hydrocarbons decreased with increasing pressure and the maximum of production was obtained at a higher temperature. The alkanes show more mature characteristics with increasing temperature at a given pressure, conversely, high pressure significantly hinders the thermal evolution of geological organic matter. The experimental results also demonstrated that the relative abundance of high molecular weight hydrocarbons may exist under the conditions of the lower lithosphere, which not only breaks through the traditional concept that alkanes mainly present at stage of “oil window”, but also en- hances the possibility to find the oil in the high tem- perature and pressure areas. | WANG Chuanyuan DU Jianguo WANG Wanchun XIE Hongsen CHEN Guojun DUAN Yi ZHOU Xiaocheng | 2006 | Chinese Science Bulletin2006，51，13： | 2 |
| 17 | Restricted Envelopes of Lie Superalgebrast显示文摘 | Liping Sun Wende Liu Xiaocheng Gao Boying Wu | 2015 | Algebra Colloquium2015，22，2： | 2 |
| 18 | EXPERIMENTAL INVESTIGATION FOR THE EFFECT OF ROTATION ON THREE-DIMENSIONAL FLOW FIELD IN FILM-COOLED TURBINE显示文摘An experimental investigation of three-dimensional flow field in a film-cooled turbine model is carried out by using particle image velocimeter (PIV) in a low-speed wind tunnel. The effects of different blowing ratios (M=1.5, 2) on the flow field are studied. The experimental results reveal the classical phenomena of the formation of kidney vortex pair and secondary flow in wake region behind the jet hole. And the changes of the kidney vortex pair and the wake at different locations away from the hole on the suction and pressure sides are also studied. Compared with the flow field in stationary cascade, there are centrifugal force and Coriolis force existing in the flow field of rotating turbine, and these forces bring the radial velocity in the jet flow. The effect of rotation on the flow field of the pressure side is more distinct than that on the suction side from the measured flow fields in Y-Z plane and radial velocity contours. The increase of blowing ratio makes the kidney vortex pair and the secondary flow in the wake region stronger and makes the range of the wake region enlarged. | YUAN Feng ZHU Xiaocheng DU Zhaohui | 2007 | Chinese Journal of Mechanical Engineering2007，20，1： | 2 |
| 19 | Multivariate similarity clustering analysis:a new method regarding biogeography and its application in global insects显示文摘A new method,multivariate similarity clustering analysis(MSCA)method,was established for biogeographical distribution analyzing.General similarity formula(GSF),the core of MSCA method,can be used to calculate the similarity coefficients between 2 and among any≥3 geographical units.Taking the global insects as example,we introduced the steps to use of GSF and consequent clustering processes of this method in details.Firstly,geographical distributions of certain taxa(e.g.Insecta)were categorized into basic geographical units(BGUs);Secondly,similarity coefficients between 2 and among n BGUs were calculated using GSF.Thirdly,hierarchical clustering was conducted according to values of similarity coefficients(from high to low);then a clustering diagram was generated.Finally,a framework of biogeographical division map was established for the target taxa(e.g.Insecta).We concluded that the MSCA method was efficiently applied in analyzing the biogeographical distribution of given biological taxa;the geographical regions regarding global insects were categorized into 7 Realms with 20 sub-Realms based on the results of MSCA method. | Xiaocheng SHEN Shujie ZHANG Qi SHEN Guilin HU Jiqi LU | 2021 | Integrative Zoology2021，16，3： | 2 |
| 20 | Processing and valorization of cellulose,lignin and lignocellulose using ionic liquids显示文摘Cellulose,lignin and lignocellulose are important bioresources in the nature.Their effective and environmentally friendly utilization not only reduces dependence on fossil resources but also protects the environment.Recently,a class of novel eco-friendly solvents,ionic liquids,is employed to dissolve and process these bioresources.In this mini-review,we summarized the recent advances of processing and valorization of cellulose,lignin and lignocellulose in ionic liquids.It is expected that this up-to-date survey provides a comprehensive information of this field,and accelerates the development and utilization of the renewable plant biomass resources. | Zhenghao Xia Jinyang Li Jinming Zhang Xiaocheng Zhang Xuejing Zheng Jun Zhang | 2020 | Journal of Bioresources and Bioproducts2020，5，2： | 2 |
您所在的机构暂未开通此部分的功能，请联系管理员