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| 1 | Salient region detection and segmentation for general object recognition and image understanding显示文摘General object recognition and image understanding is recognized as a dramatic goal for computer vision and multimedia retrieval. In spite of the great efforts devoted in the last two decades, it still remains an open problem. In this paper, we propose a selective attention-driven model for general image understanding, named GORIUM (general object recognition and image understanding model). The key idea of our model is to discover recurring visual objects by selective attention modeling and pairwise local invariant features matching on a large image set in an unsupervised manner. Towards this end, it can be formulated as a four-layer bottom-up model, i.e., salient region detection, object segmentation, automatic object discovering and visual dictionary construction. By exploiting multi-task learning methods to model visual saliency simultaneously with the bottom-up and top-down factors, the lowest layer can effectively detect salient objects in an image. The second layer exploits a simple yet effective learning approach to generate two complementary maps from several raw saliency maps, which then can be utilized to segment the salient objects precisely from a complex scene. For the third layer, we have also implemented an unsupervised approach to automatically discover general objects from large image set by pairwise matching with local invariant features. Afterwards, visual dictionary construction can be implemented by using many state-of-the-art algorithms and tools available nowadays. | HUANG TieJun TIAN YongHong LI Jia YU HaoNan | 2011 | Science China(Information Sciences)2011，54，12： | 14 |
| 2 | SURFACE STRESS EFFECT IN MECHANICS OF NANOSTRUCTURED MATERIALS显示文摘This review article summarizes the advances in the surface stress effect in mechanics of nanostructured elements,including nanoparticles,nanowires,nanobeams,and nanofilms,and heterogeneous materials containing nanoscale inhomogeneities.It begins with the fundamental formulations of surface mechanics of solids,including the definition of surface stress as a surface excess quantity,the surface constitutive relations,and the surface equilibrium equations.Then,it depicts some theoretical and experimental studies of the mechanical properties of nanostructured elements,as well as the static and dynamic behaviour of cantilever sensors caused by the surface stress which is influenced by adsorption.Afterwards,the article gives a summary of the analytical elasto-static and dynamic solutions of a single as well as multiple inhomogeneities embedded in a matrix with the interface stress prevailing.The effect of surface elasticity on the diffraction of elastic waves is elucidated.Due to the difficulties in the analytical solution of inhomogeneities of complex shapes and configurations,finite element approaches have been developed for heterogeneous materials with the surface stress.Surface stress and surface energy are inherently related to crack propagation and the stress field in the vicinity of crack tips.The solutions of crack problems taking into account surface stress effects are also included.Predicting the effective elastic and plastic responses of heterogeneous materials while taking into account surface and interface stresses has received much attention.The advances in this topic are inevitably delineated.Mechanics of rough surfaces appears to deserve special attention due to its theoretical and practical implications.Some most recent work is reviewed.Finally,some challenges are pointed out.They include the characterization of surfaces and interfaces of real nanomaterials,experimental measurements and verification of mechanical parameters of complex surfaces,and the effects of the physical and chemical processes on the surface properties,etc. | Jianxiang Wang Zhuping Huang Huiling Duan Shouwen Yu Xiqiao Feng Gangfeng Wang Weixu Zhang Tiejun Wang | 2011 | Acta Mechanica Solida Sinica2011，24，1： | 11 |
| 3 | Advances in direct production of value-added chemicals via syngas conversion显示文摘Syngas conversion to fuels and chemicals is one of the most challenging subjects in the field of C1 chemistry. It is considered as an attractive alternative non-petroleum-based production route. The direct synthesis of olefins and alcohols as high value-added chemicals from syngas has drawn particular attention due to its process simplicity, low energy consumption and clean utilization of carbon resource, which conforms to the principles of green carbon science. This review describes the recent advances for the direct production of lower olefins and higher alcohols via syngas conversion. Recent progress in the development of new catalyst systems for enhanced catalytic performance is highlighted. We also give recommendations regarding major challenges for further research in syngas conversion to various chemicals. | Yunlei An Tiejun Lin Fei Yu Yanzhang Yang Liangshu Zhong Minghong Wu Yuhan Sun | 2017 | Science China Chemistry2017，60，7： | 8 |
| 4 | Decreased miR-320 expression is associated with breast cancer progression, cell migration, and invasiveness via targeting Aquaporin 1显示文摘我们的以前的研究证明了 Aquaporin 1 (AQP1 ) 是在乳癌的 overexpressed。然而,机制留下逃犯。MicroRNA 320 (miR-320 ) downregulation 在癌症的各种各样的类型被报导了,并且它可以调整 AQP1 表示。在这研究, miR-320 和 AQP1 表情被量的反向的 transcription-PCR 调查,在 situ 杂交,和 immunohistochemistry。这些分子的 clinicopathological 含意也被分析。我们发现那 miR-320 表情在人的乳癌病人是在血浆和肿瘤织物的 downregulated。幸存分析证明 miR-320 的那减少的表情和 AQP1 的 overexpression 与更坏的预后被联系。酶试金证明 miR-320 否定地调整 AQP1 表示。另外,房间增长,移植,和侵略试金被执行在乳癌房间上调查 miR-320 的效果。我们的结果证明 miR-320 overexpression 由 downregulating AQP1 在乳癌房间禁止房间增长,移植,和侵略。这些观察建议 miR-320 downregulation 可以在乳癌提高 AQP1 表示,赞成肿瘤前进。我们的调查结果显示 miR-320 和 AQP1 可以在乳癌的治疗用作预示的 biomarkers 和治疗学的目标。 | Liang Luo Rui Yang Shaojie Zhao Yu Chen Shanchao Hong Ke Wang Tiejun Wang Jing Cheng Ting Zhang Daozhen Chen | 2018 | Acta Biochimica et Biophysica Sinica2018，50，5： | 6 |
| 5 | A CONDITIONAL RANDOM FIELDS APPROACH TO BIOMEDICAL NAMED ENTITY RECOGNITION显示文摘Named entity recognition is a fundamental task in biomedical data mining. In this letter, a named entity recognition system based on CRFs (Conditional Random Fields) for biomedical texts is presented. The system makes extensive use of a diverse set of features, including local features, full text features and external resource features. All features incorporated in this system are described in detail, and the impacts of different feature sets on the performance of the system are evaluated. In order to improve the performance of system, post-processing modules are exploited to deal with the abbrevia- tion phenomena, cascaded named entity and boundary errors identification. Evaluation on this system proved that the feature selection has important impact on the system performance, and the post-processing explored has an important contribution on system performance to achieve better re- sults. | Wang Haochang Zhao Tiejun Li Sheng Yu Hao | 2007 | Journal of Electronics(China)2007，24，6： | 3 |
| 6 | Experimental investigation of a passive self-tuning resonator based on a beam-slider structure显示文摘This work investigates a self-tuning resonator composed of a slender clamped-clamped steel beam and a freely movable slider.The clamped-clamped beam exhibits hardening nonlinearity when it vibrates in large amplitude,providing a broad bandwidth of dynamic response.The moving slider changes the mass distribution of the whole structure,and provides a passive self-tuning approach for capturing the high-energy orbit of the structure.In the case without inclination,adequate inertial force that mainly depends on the vibration amplitude of the beam and the position of the slider can drive the slider to move from the side toward the centre of the beam.This movement amplifies the beam response when the excitation frequency is below 37 Hz in our prototyped device.In the multi-orbit frequency range(28-37 Hz),the self-tuning and magnification of beam response can be achieved when the slider is initially placed in an appropriate position on the beam.Once the beam is disturbed,however,the desired response in the high-energy orbit can be lost easily and cannot be reacquired without external assistance.In an improved design with a small inclination,the introduced small gravitational component enables the slider to move from the higher side toward the lower side when the beam amplitude is small.This property sacrifices the less efficient self-tuning region below 25 Hz,but can enable the beam to acquire and maintain the high-energy orbit response in the multi-orbit frequency range(28-39 Hz),which is resistant to disturbance.The proposed resonator in this paper not only broadens the frequency bandwidth of dynamic response,but also enables capture and maintenance of the high-energy orbit in a completely passive way.Such a passive self-tuning structure presents an advantage in the design of broadband vibration energy-harvesting systems. | Liuding Yu Lihua Tang Tiejun Yang | 2019 | Acta Mechanica Sinica2019，35，5： | 3 |
| 7 | Toward the Next Generation of Retinal Neuroprosthesis: Visual Computation with Spikes显示文摘A neuroprosthesis is a type of precision medical device that is intended to manipulate the neuronal signals of the brain in a closed-loop fashion,while simultaneously receiving stimuli from the environment and controlling some part of a human brain or body.Incoming visual information can be processed by the brain in millisecond intervals.The retina computes visual scenes and sends its output to the cortex in the form of neuronal spikes for further computation.Thus,the neuronal signal of interest for a retinal neuroprosthesis is the neuronal spike.Closed-loop computation in a neuroprosthesis includes two stages:encoding a stimulus as a neuronal signal,and decoding it back into a stimulus.In this paper,we review some of the recent progress that has been achieved in visual computation models that use spikes to analyze natural scenes that include static images and dynamic videos.We hypothesize that in order to obtain a better understanding of the computational principles in the retina,a hypercircuit view of the retina is necessary,in which the different functional network motifs that have been revealed in the cortex neuronal network are taken into consideration when interacting with the retina.The different building blocks of the retina,which include a diversity of cell types and synaptic connections-both chemical synapses and electrical synapses(gap junctions)-make the retina an ideal neuronal network for adapting the computational techniques that have been developed in artificial intelligence to model the encoding and decoding of visual scenes.An overall systems approach to visual computation with neuronal spikes is necessary in order to advance the next generation of retinal neuroprosthesis as an artificial visual system. | Zhaofei Yu Jian K.Liu Shanshan Jia Yichen Zhang Yajing Zheng Yonghong Tian Tiejun Huang | 2020 | Engineering2020，6，4： | 3 |
| 8 | Number of COVID-19 cases required in a population to detect SARS-CoV-2 RNA in wastewater in the province of Alberta, Canada:Sensitivity assessment显示文摘With a unique and large size of testing results of 1,842 samples collected from 12 wastewater treatment plants (WWTP) for 14 months through from low to high prevalence of COVID-19,the sensitivity of RT-qPCR detection of SARS-CoV-2 RNA in wastewater that correspond to the communities was computed by using Probit analysis.This study determined the number of new COVID-19 cases per 100,000 population required to detect SARS-CoV-2RNA in wastewater at defined probabilities and provided an evidence-based framework of wastewater-based epidemiology surveillance (WBE).Input data were positive and negative test results of SARS-CoV-2 RNA in wastewater samples and the corresponding new COVID-19 case rates per 100,000 population served by each WWTP.The analyses determined that RT-qPCR-based SARS-CoV-2 RNA detection threshold at 50%,80%and 99%probability required a median of 8 (range:4-19),18 (9-43),and 38 (17-97) of new COVID-19 cases/100,000,respectively.Namely,the positive detection rate at 50%,80%and 99%probability were 0.01%,0.02%,and 0.04%averagely for new cases in the population.This study improves understanding of the performance of WBE SARS-CoV-2 RNA detection using the large datasets and prolonged study period.Estimated COVID-19 burden at a community level that would result in a positive detection of SARS-CoV-2 in wastewater is critical to support WBE application as a supplementary warning/monitoring system for COVID-19 prevention and control. | Qiaozhi Li Bonita E.Lee Tiejun Gao Yuanyuan Qiu Erik Ellehoj Jiaao Yu Mathew Diggle Graham Tipples Rasha Maal-Bared Deena Hinshaw Christopher Sikora Nicholas J.Ashbolt James Talbot Steve E.Hrudey Xiaoli Pang | 2023 | Journal of Environmental Sciences2023，，3： | 2 |
| 9 | Key Technologies in Mobile Visual Search and MPEG Standardization Activities显示文摘Visual search has been a long-standing problem in applications such as location recognition and product search.Much research has been done on image representation,matching,indexing,and retrieval.Key component technologies for visual search have been developed,and numerous real-world applications are emerging.To ensure application interoperability,the Moving Picture Experts Group(MPEG) has begun standardizing visual search technologies and is developing the compact descriptors for visual search(CDVS) standard.MPEG seeks to develop a collaborative platform for evaluating existing visual search technologies.Peking University has participated in this standardization since the 94th MPEG meeting,and significant progress has been made with the various proposals.A test model(TM) has been selected to determine the basic pipeline and key components of visual search.However,the first-version TM has high computational complexity and imperfect retrieval and matching.Core experiments have therefore been set up to improve TM.In this article,we summarize key technologies for visual search and report the progress of MPEG CDVS.We discuss Peking University's efforts in CDVS and also discuss unresolved issues. | Ling- Yu Duan Jie Chen Chunyu Wang Rongrong Ji Tiejun Huang Wen Gao | 2012 | ZTE Communications2012，10，2： | 2 |
| 10 | Characterization of a full-length infectious clone of bovine foamy virus 3026显示文摘The biological features of most foamy viruses(FVs) are poorly understood, including bovine foamy virus(BFV). BFV strain 3026(BFV3026) was isolated from the peripheral blood mononuclear cells of an infected cow in Zhangjiakou, China. A full-length genomic clone of BFV3026 was obtained from BFV3026-infected cells, and it exhibited more than 99% amino acid(AA) homology to another BFV strain isolated in the USA. Upon transfection into fetal canine thymus cells, the full-length BFV3026 clone produced viral structural and auxiliary proteins, typical cytopathic effects, and virus particles. These results demonstrate that the full-length BFV3026 clone is fully infectious and can be used in further BFV3026 research. | Tiejun Bing Hong Yu Yue Li Lei Sun Juan Tan Yunqi Geng Wentao Qiao | 2014 | Virologica Sinica2014，29，2： | 2 |
| 11 | Adenocarcinoma transformed into squamous cell carcinoma in non-small cell lung cancer显示文摘Non-small cell lung cancer(NSCLC)is the most common form of lung cancer which remains the deadliest malignancy worldwide(Siegel et al.,2019).In general,NSCLC can be divided into several subtypes,including adenocarcinoma(ADC),squamous cell carcinoma(SCC),adeno-squamous cell carcinoma(AD-SCC)and large cell carcinoma(LCC). | Yueqiang Jiang Jun Zhang Jin Feng Yaping Lu Yuan Fan Ling Cheng Xin Liao Liya Hu Shiying Yu Tiejun Yin | 2021 | Journal of Genetics and Genomics2021，48，7： | 1 |
| 12 | Clear cell odontogenic carcinoma : A clinicopathological and immunocytochemical study of five cases显示文摘 | Li Tiejun Yu Shifeng Gao Yan | 2001 | Arch Pathol Lab Med2001，125，12： | 1 |
| 13 | A studyon casing deformation failure during multi-stage hydraulicfracturing for the stimulated reservoir volume of horizontalshale wells 显示文摘 | Lian Zhanghua Yu Hao Lin Tiejun Guo Jianhua | 2015 | Journal of Natural Gas Science and Engi-neering2015，23，： | 1 |
| 14 | Effect of Sodium on the Structure-Performance Relationship of Co/SiO2 for Fischer-Tropsch Synthesis显示文摘有不同的钠(Na ) 的一系列 Co/SiO 2 催化剂装载(0, 0.1, 0.2, 0.5 并且 1wt%) 被准备并且评估了让 Fischer-Tropsch 反应在催化剂结构和催化性能上学习 Na 的效果。Na 的增加被发现催化活动和烃选择到减少,但是由于提高的 WGS 活动增加公司 2 选择。Na 的增加也导致了更高的选择到氧化(白酒和醛) 并且 O/P 比率以及到更低的碳的烃的移动数。结构描述与 Na 的增加为锻烧的样品在表面区域和粒子尺寸揭示了减少。公司 2 C 为支持 Na 的催化剂在反应过程期间被形成。作为结果,新公司 / 公司 2 C bifunctional 活跃地点被产生为氧化形成导致增加氧化选择。另外,公司 2 C nanoparticles 可以也独自充当双活跃地点为氧化在在有装载的高 Na 的支持的催化剂上的高反应压力的形成。 | Yuanyuan Dai Fei Yu Zhengjia Li Yunlei An Tiejun Lin Yanzhang Yang Liangshu Zhong Hui wang Yuhan Sun | 2017 | Chinese Journal of Chemistry2017，35，6： | 1 |
| 15 | Quantitative trait locus mapping of yield and plant height in autotetraploid alfalfa(Medicago sativa L.)显示文摘Alfalfa(Medicago sativa L.)is the most widely grown forage legume crop worldwide.Yield and plant height are important agronomic traits influenced by genetic and environmental factors.The objective of this study was to identify quantitative trait loci(QTL)and molecular markers associated with alfalfa yield and plant height.To understand the genetic basis of these traits,a full-sib F1 population composed of 392 individuals was developed by crossing a low-yielding precocious alfalfa genotype(male parent)with a high-yielding latematuring alfalfa cultivar(female parent).The linkage maps were constructed with 3818 single-nucleotide polymorphism(SNP)markers on 64 linkage groups.QTL for yield and plant height were mapped using phenotypic data for three years.Sixteen QTL associated with yield and plant height were identified on chromosomes 1 to 8.Six QTL explained more than 10%of phenotypic variation,representing major loci controlling yield and plant height.One locus on chromosome 1 controlling yield traits had not been identified in previous studies.Three QTL co-located with other QTL(qyield-1 and qheight-7,qheight-5 and qyield-4,qheight-6,and qyield-6).With further validation,the markers closely linked with these QTL may be used for marker-assisted selection in breeding new alfalfa varieties with high yield. | Fei He Ruicai Long Tiejun Zhang Fan Zhang Zhen Wang Xijiang Yang Xueqian Jiang Changfu Yang Xuxin Zhi Mingna Li Longxi Yu Junmei Kang Qingchuan Yang | 2020 | The Crop Journal2020，8，5： | 1 |
| 16 | In situ investigations into overburden failures of a super-thick coal seam for longwall top coal caving显示文摘 | Yu Bin Zhao Jun Kuang Tiejun | 2015 | International Journal of Rock Mechanics&Mining Sciences2015，78，： | 1 |
| 17 | Shear strength of reinforced lightweight concrete beams of normal and high strength concrete显示文摘 | Ahmad S H Yuliang XIE Tiejun YU | 1994 | Magazine of Concrete Research1994，46，166： | 1 |
| 18 | A Multi-Agent Strategy Chinese Text for Both English and Chunking显示文摘 | LIANG Yinghong ZHAO Tiejun YAO Jianmin YU Hao | 2006 | Chinese Journal of Electronics2006，15，3： | 1 |
| 19 | Linking the past and present to predict the distribution of Asian crested ibis(Nipponia nippon)under global changes显示文摘Understanding how species’ecological niches adapt to environmental changes through time is critical for predicting the effect of future global change on endangered species.Yet few studies have incorporated knowledge of past niche shifting into the assessment of species’future fate in a changing world.In this study,we integrated the ecological niche dynamics into the species distribution modeling of the Asian crested ibis(Nipponia nippon)in East Asia.Specifically,we compared historical and present ecological niches of crested ibis in four-dimensional environmental space based on species occurrence and environmental data.We then employed a multi-temporal ecological niche model to estimate the potential geographical distribution of crested ibis under future climate and land-use changes.Our results show that crested ibis retained similar though not identical ecological niches over time.Compared to the historical baseline range,the current suitable habitat for crested ibis has been reduced by 39.6%.The effects of human activity outweigh those of climate change regarding the distribution of crested ibis.We conclude that the ecological niche of crested ibis was tended to be conservative,and future potentially suitable habitat may encounter northeastward and northwestward shift,and possibly expand by 18.7%referred to the historical range.Thefindings of our study are of clear importance for the conservation and successful reintroduction of crested ibis in East Asia. | Fangyuan YU Yiwen SUN Tiejun WANG Andrew KSKIDMORE Changqing DING Xinping YE | 2022 | Integrative Zoology2022，17，6： | 1 |
| 20 | A lexicalized second-order-HMM for ambiguity resolution in Chinese segmentation and POS tagging显示文摘Hidden Markov Model(HMM) is a main solution to ambiguities in Chinese segmentation and POS (part-of-speech) tagging. While most previous works for HMM-based Chinese segmentation and POS tagging consult POS information in contexts, they do not utilize lexical information which is crucial for resolving certain morphological ambiguity. This paper proposes a method which incorporates lexical information and wider context information into HMM. Model induction and related smoothing technique are presented in detail. Experiments indicate that this technique improves the segmentation and tagging accuracy by nearly 1%. | 陈鄞 Yang Muyun Zhao Tiejun Yu Hao Li Sheng | 2005 | High Technology Letters2005，11，4： | 1 |
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