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An East Asian Monsoon in the Mid-Pliocene

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Atmospheric and Oceanic Science Letters 2012年第6期5卷 449-454页

作者： YAN qing ZHANG Zhong-shi gao Yong-qi Nansen-Zhu International Research Centre Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China Graduate University of Chinese Academy of Sciences Beijing 100049 China Bjerknes Centre for Climate Research UniResearch Bergen 5007 Norway Nansen Environmental and Remote Sensing Center Bergen 5006 Norway

In this study, the authors simulate the East Asian climate changes in the mid-Pliocene (～3.3 to 3.0 Ma BP) with the Community Atmosphere Model version 3.1 (CAM3.1) and compare the simulated East Asian monsoon with paleoclimate data. The simulations show an obvious warming pattern in East Asia in the mid-Pliocene compared with the pre-industrial climate, with surface air temperature increasing by 0.5 4.0°C. In the warm mid-Pliocene simulation, the East Asian Summer Monsoon (EASM) becomes stronger, while the East Asian Winter Monsoon (EAWM) is similar relative to the pre-industrial climate. Compared with the paleoclimate data, our simulations depict the intensified EASM well but cannot reproduce the weakened EAWM. This model-data discrepancy may be attributed to the uncertainty in the reconstructed mid-Pliocene sea surface temperature.

关键词： East Asian monsoon mid-Pliocene warm period paleoclimate data

Context-aware location discovery exchange in a ubiquitous environment

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The Journal of China Universities of Posts and Telecommunications 2012年第6期19卷 73-78页

作者： LIU qi gao Feng Jiangsu Engineering Center of Network Monitoring Nanjing University of Information Science & Technology School of Information Science and Technology Shijiazhuang Tiedao University

It becomes challenging in order to represent, discover and exchange location information in a ubiquitous environment due to dynamic movement and interaction between mobile nodes inside. In this paper, a new method is presented in order to make location information context-aware so that organizing the format of location information and maintaining the communication between direct connected nodes in a ubiquitous environment is enabled. The structure of a contextual location information repository and a context information communication protocol is manipulated to implement the proposed features. According to the simulation results in network simulator version2 （NS2）, the new method has depicted good discovery success ~nd consumed efficient service discovery bandwidth. Other network traffic, i.e. transmission control protocol, （TCP） has been simulated in the scenarios but the new location-aware method has shown its robustness with continuous context discovery process.

关键词： context-aware ubiquitous computing location-aware service discovery

HUITWU： An Efficient Algorithm for High-Utility Itemset Mining in Transaction Databases

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Journal of Computer Science & Technology 2016年第4期31卷 776-786页

作者： shi-Ming Guo Hong gao School of Computer Science and Technology Harbin Institute of Technology Harbin 150001 China

Mining high-utility itemsets （HUIs） from a transaction database refers to the discovery of itemsets with high utilities like profits. Most of existing studies discover HUIs from a transaction database in two phases. In phase 1, different overestimation methods are applied to calculate the upper bounds of the utilities of itemsets. Since the overestimated utilities of itemsets are adopted, the itemsets whose overestimated utilities are no less than a user-specified threshold are selected as candidate HUIs, and they are verified by scanning the database one more time in phase 2. However, a large number of candidate HUIs incur two problems： 1） it requires excessive memory to store these candidates; 2） it needs a large amount of running time to calculate their exact utilities. Vertical data format has been applied to mine HUIs recently. However this kind of method cannot deal with transactions with the same items effectively so that the size of database cannot be reduced sufficiently. The overall performance of algorithms is degraded consequently. Thus an algorithm HUITWU is proposed in this paper for mining HUIs. A novel data structure HUITwu-Tree is adopted to efficiently calculate the utilities of itemsets in a database. Extensive studies with both sparse and dense datasets have demonstrated that our proposed algorithm is more than an order of magnitude faster and consumes less memory than the state-of-the-art algorithms.

关键词： data mining high-utility itemset pattern growth

On the Existence of Ground State Solutions to a Quasilinear Schr?dinger Equation involving p-Laplacian

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Acta Mathematicae Applicatae Sinica 2023年第2期39卷 381-395页

作者： Ji-xiu WANG qi gao School of Mathematics and Statistics Hubei University of Arts and ScienceXiangyang 441053China Department of Mathematics School of ScienceWuhan University of TechnologyWuhan 430070China

We consider the following quasilinear Schrodinger equation involving p-Laplacian-Δpu+V(x)|u|^(p-2)u-Δp(|u|^(2η))|u|^(2η-2)u=λ|u|^(q-2)u/|x|^(μ)+|u|^(2ηp*(v)-2)u/|x|^(v)in R^(N),where N>p>1,η≥p/2(p-1),p0,μ,ν∈[0,p).Via the Mountain Pass Theorem and the Concentration Compactness Principle,we establish the existence of nontrivial ground state solutions for the above problem.

关键词： quasilinear Schrodinger equation critical Hardy-Sobolev exponent ground state solutions singularities

New horizons for selenium in animal nutrition and functional foods

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Animal Nutrition 2022年第4期11卷 80-86页

作者： Xin Gu Chun-qi gao Guangdong Provincial Key Laboratory of Animal Nutrition Control/Key Laboratory of Chicken Genetics Breeding and ReproductionMinistry of AgricultureCollege of Animal ScienceSouth China Agricultural University GuangdongChina College of Animal SciencesZhejiang UniversityHangzhouChina

Selenium(Se),one of the indispensable nutrients for both human health and animal growth,participates in various physiological functions,such as antioxidant and immune responses and *** role of dietary Se,in its organic and inorganic forms,has been well documented in domestic ***,many feeding strategies for different animals have been developed to increase the Se concentration in animal products to address Se deficiency and even as a potential nutritional strategy to treat free radical-associated ***,studies on investigating the optimum addition of Se in feed,the long-term consequences of Se usage in food for animal nutrition,the mechanism of metallic Se nanoparticle(SeNP)transformation in vivo,and the nutritional effects of SeNPs on feed workers and the environment are urgently *** from the absorption and metabolism mechanism of Se,this review discusses the antioxidant role of Se in *** on this characteristic,we further investigated the application of Se in animal health and described some unresolved issues and unanswered questions warranting further *** review is expected to provide a theoretical reference for improving the quality of food animal meat as well as for the development of Se-based biological nutrition enhancement technology.

关键词： Selenium Antioxidant Meat quality Functional foods

L^(2) Extension and Effectiveness of L^(p) Strong Openness Property

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Acta Mathematica Sinica,English Series 2023年第5期39卷 814-826页

作者： shi Jie BAO qi An GUAN School of Mathematical Sciences Peking UniversityBeijing 100871P.R.China

In this note,we present an L^(2) extension approach to the effectiveness result of L^(P) strong openness property of multiplier ideal sheaves.

关键词： Optimal L^(2)extension multiplier ideal sheaf L^(P)strong openness property

Northeastern Asia humidification at the end of the Miocene drives the boost of mammalian dispersals from the Old to New World

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Journal of Palaeogeography 2023年第1期12卷 50-68页

作者： qigao Jiangzuo shi-qi Wang Key Laboratory of Orogenic Belts and Crustal Evolution School of Earth and Space SciencesPeking UniversityBeijing 100871China Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences Institute of Vertebrate Paleontology and PaleoanthropologyChinese Academy of SciencesBeijing 100871China CAS Center for Excellence in Life and Paleoenvironment Beijing 100871China Division of Paleontology American Museum of Natural HistoryNew YorkNY 10024-5102USA

Mammals have high dispersal ability,and many lineages can spread across the continents when a landbridge ***,we summarize the dispersal of mammals between the Old and New World at the end of the *** analysis suggested that the three phases of dispersal represented the largest dispersal tide during the Neogene,and the direction of dispersal is dominated by being from the Old to New *** from the components that crossed the dispersal corridor,the Arctic environment near the Beringia corridor in the first phase(~7.5 Ma)is a mixed environment,and in the second phase(~6.5 Ma)is an open environment,and in the third phase(~5.8 Ma and continue to the Pliocene)is a wooded(closed)environment.A clear trend of eastern Asian humidification driven by Asian monsoon and the global C4 grassland expansion explain this dispersal *** boost of mammalian dispersals is controlled by the heterogeneity of environmental changes in different continents.

关键词： Eastern asia North America Carnivora Dispersal Late miocene

Stabilities and Electronic Spectra for C_(78)O_2 Isomers

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Chinese Journal of Structural Chemistry 2005年第8期24卷 925-929页

作者： TENG qi-Wen WU shi Department of Chemistry Zhejiang University ChinaHangzhou 310027

Structures and stabilities of 22 possible isomers for C78O2 based on C78（C2v） were studied by INDO series of methods. The most stable geometry is that two oxygen atoms are added to 1,2-bond crossed by the shortest z axis and 32,35-bond near the longest x axis in C78（C2v）,in agreement with the experiment of adducts for C78（C2v）. 1,2,32,35-C78O2 is more stable than 1,2,19,22-C78O2 by 0.12 kcal/mol and epoxide structures are formed in each isomer. Electronic spectra for C78O2 were investigated with INDO/CIS method. The reason of the blue-shift for UV absorptions of 1,2,32,35-C78O2 compared with that of C78（C2v） was discussed and electronic transition was theoretically assigned.

关键词： C78O2 electronic spectra INDO

L^(2)Extension and Effectiveness of Strong Openness Property

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Acta Mathematica Sinica,English Series 2022年第11期38卷 1949-1964页

作者： shi Jie BAO qi An GUAN School of Mathematical Sciences Peking UniversityBeijing 100871P.R.China

In this note,we present an L^(2)extension approach to the effectiveness result of strong openness property of multiplier ideal sheaves.

关键词： Optimal L^(2)extension multiplier ideal sheaf strong openness property