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Search Results: 1 - 10 of 28454 matches for " Xiaojie Zhu "
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Positive feedback of winter ocean-atmosphere interaction in Northwest Pacific
Xiaojie Zhu,Jilin Sun
Chinese Science Bulletin , 2006, DOI: 10.1007/s11434-006-2098-9
Abstract: Using monthly mean atmospheric reanalysis data and oceanic assimilation data product, the winter ocean-atmosphere interaction in middle and high latitude in Northwest Pacific was studied. Key regions were chosen to study the variations of Aleutian Low, the 500hPa westerly, the meriodional sea surface temperature (SST) gradient with three indices defined as Aleutian Low index, zonal index and meridional SST gradient between Kuroshio-influenced region and Oyashio-influenced region. The results show that when there is a deeper Aleutian Low accompanied by a stronger northerly wind in the westem part of the Aleutian Low, the subpolar gyre of North Pacific is strengthened, the SST in the Oyashio-influenced region is decreased and the meridional SST gradient between Kuroshio-influ-enced region and Oyashio-influenced region is increased, which, in tum, will enhance the westerly jet in the upper troposphere due to thermal-wind relation. The strengthened westerly jet makes a favorable condition for the deeper Aleutian Low over North Pacific beneath the left part of the jet exit region. Consequently, a positive feedback forms there.
Growth and mortality rates of yellowfin tuna, Thunnus albacares (Perciformes: Scombridae), in the eastern and central Pacific Ocean
Zhu, Guoping;Xu, Liuxiong;Dai, Xiaojie;Liu, Wei;
Zoologia (Curitiba) , 2011, DOI: 10.1590/S1984-46702011000200007
Abstract: age and growth parameters were estimated for the yellowfin tuna thunnus albacares (bonnaterre, 1788). atotal of 443 individuals were sampled from china longline fisheries in the eastern and central pacific ocean from february to november 2006. the von bertalanffy growth parameters were estimated at l∞ = 175.9 cm fork length, k = 0.52 year-1, and t0 = 0.19 year. the total mortality rate (z) was estimated to be from 1.19 to 1.93 year-1, the fishing mortality (f) and the natural mortality (m) were calculated to be 0.91 year-1 and 0.65 year-1, respectively. the rate of exploitation (u) was estimated to be 0.46. this study provides estimates of growth and mortality rate for yellowfin tuna in the eastern and central pacific ocean, which may be used as biological input parameters in future stock assessments for the oceanic region. however, age analysis with other techniques, additional validation of the size composition and stock structure are also needed.
Finding More Relevance: Propagating Similarity on Markov Random Field for Image Retrieval
Peng Lu,Xujun Peng,Xinshan Zhu,Xiaojie Wang
Computer Science , 2013,
Abstract: To effectively retrieve objects from large corpus with high accuracy is a challenge task. In this paper, we propose a method that propagates visual feature level similarities on a Markov random field (MRF) to obtain a high level correspondence in image space for image pairs. The proposed correspondence between image pair reflects not only the similarity of low-level visual features but also the relations built through other images in the database and it can be easily integrated into the existing bag-of-visual-words(BoW) based systems to reduce the missing rate. We evaluate our method on the standard Oxford-5K, Oxford-105K and Paris-6K dataset. The experiment results show that the proposed method significantly improves the retrieval accuracy on three datasets and exceeds the current state-of-the-art retrieval performance.
Solving the collective-risk social dilemma with risky assets in well-mixed and structured populations
Xiaojie Chen,Yanling Zhang,Ting-Zhu Huang,Matjaz Perc
Computer Science , 2014, DOI: 10.1103/PhysRevE.90.052823
Abstract: In the collective-risk social dilemma, players lose their personal endowments if contributions to the common pool are too small. This fact alone, however, does not always deter selfish individuals from defecting. The temptations to free-ride on the prosocial efforts of others are strong because we are hardwired to maximize our own fitness regardless of the consequences this might have for the public good. Here we show that the addition of risky assets to the personal endowments, both of which are lost if the collective target is not reached, can contribute to solving the collective-risk social dilemma. In infinite well-mixed populations risky assets introduce new stable and unstable mixed steady states, whereby the stable mixed steady state converges to full cooperation as either the risk of collective failure or the amount of risky assets increases. Similarly, in finite well-mixed populations the introduction of risky assets enforces configurations where cooperative behavior thrives. In structured populations cooperation is promoted as well, but the distribution of assets amongst the groups is crucial. Surprisingly, we find that the completely rational allocation of assets only to the most successful groups is not optimal, and this regardless of whether the risk of collective failure is high or low. Instead, in low-risk situations bounded rational allocation of assets works best, while in high-risk situations the simplest uniform distribution of assets among all the groups is optimal. These results indicate that prosocial behavior depends sensitively on the potential losses individuals are likely to endure if they fail to cooperate.
Research on the Trans-Regional Integration of Chinese Family Enterprise Based on the Perspective of Organizational Trust and Control
—A Case Study of Hope Group
 [PDF]

Sheng Xu, Xiaojie Huang
Open Journal of Social Sciences (JSS) , 2015, DOI: 10.4236/jss.2015.312009
Abstract: Under the background of Chinese Regional Market Segmentation and Familism Dilemma, this article deeply analyses Hope Group with the method of case study and then demonstrates the relationship between the trans-regional market scope, organizational trust and control. The result shows that, on the one hand, the market scope influences the way of control directly, that is, with the expansion of the market, family enterprise tends to adopt formal control rather than informal control. On the other hand, the scope of trans-regional market integration affects the way of organizational control indirectly by having an influence on organizational trust. With the enlargement of market scope, the evolution of organization trust helps to optimize control mode and finally achieve the integration of formal control and informal control in China’s family enterprise.
Analysis of the Problems and Countermeasures of China’s Green Credit  [PDF]
Xiaojie Wu, Xuehua Zhang
Journal of Geoscience and Environment Protection (GEP) , 2018, DOI: 10.4236/gep.2018.66009
Abstract: At present, China’s green credit market is the most important channel for green financing and has a great influence on the development of China’s green finance. Based on the collection and arrangement of the related data and information, the paper points out the main problems which is existing in China’s green credit by figures and examples from aspects of detail standards of policies, the matching level between deposits and loans and the management ability of avoiding environmental risk. Furthermore, the paper puts forward corresponding countermeasures of the problems.
Structure of reproductive apparatus of Gracilaria/Gracilariopsis lemaneiformis (Gracilariaceae, Rhodophyta)
Di Xu,JianYi Zhu,Yang He,XiaoJie Cheng,WenYan Zhang,XueCheng Zhang
Science China Life Sciences , 2008, DOI: 10.1007/s11427-008-0147-0
Abstract: Reproductive apparatus of Gracilaria/Gracilariopsis lemaneiformis collected from Qingdao city were studied with a light and a transmission electron microscope. The special superficial arrangement of spermatangium for this species was clearly observed, and the ultrastructure of spermatangial development revealed the similar cytodynamic pattern followed by all the Gracilariaceae members developed from spermatangial mother cells to spermatangium. The female reproductive apparatus before fertilization was also observed and trichogyne was found protruding above the cortex, contrary to the earlier reports. Tetrasporangium was formed by an outer cortical cell and the tetraspores became spherical and expended after being released.
A Novel Two-Section Co-Cavity Wavelength Tunable Sem iconductor Laser
Zhao Yanrui,Wang Wei,Wang Xiaojie,Zhu Hongliang,Zhou Fan,Ma Chaohua
半导体学报 , 1999,
Abstract: Wavelengthtunablelaserdiodesarepromisinglightsourcesforwavelength-division-multiplexing(WDM)networks,coherentco...
Structure of reproductive apparatus of Gracilaria/ Gracilariopsis lemaneiformis (Gracilariaceae, Rhodophyta)

XU Di,ZHU JianYi,HE Yang,CHENG XiaoJie,ZHANG WenYan &,ZHANG XueCheng,

中国科学C辑(英文版) , 2008,
Abstract: Reproductive apparatus of Gracilaria/Gracilariopsis lemaneiformis collected from Qingdao city were studied with a light and a transmission electron microscope. The special superficial arrangement of spermatangium for this species was clearly observed, and the ultrastructure of spermatangial development revealed the similar cytodynamic pattern followed by all the Gracilariaceae members developed from spermatangial mother cells to spermatangium. The female reproductive apparatus before fertilization was also observed and trichogyne was found protruding above the cortex, contrary to the earlier reports. Tetrasporangium was formed by an outer cortical cell and the tetraspores became spherical and expended after being released. Supported by the National Natural Sciences Foundation of China (Grant No. 40606034) and the National High-Tech Research and Development Program of China (Grant No. 2006AA10A413)
Approaches for Identification of HIV-1 Entry Inhibitors Targeting gp41 Pocket
Fei Yu,Lu Lu,Lanying Du,Xiaojie Zhu,Asim K. Debnath,Shibo Jiang
Viruses , 2013, DOI: 10.3390/v5010127
Abstract: The hydrophobic pocket in the HIV-1 gp41 N-terminal heptad repeat (NHR) domain plays an important role in viral fusion and entry into the host cell, and serves as an attractive target for development of HIV-1 fusion/entry inhibitors. The peptide anti-HIV drug targeting gp41 NHR, T-20 (generic name: enfuvirtide; brand name: Fuzeon), was approved by the U.S. FDA in 2003 as the first HIV fusion/entry inhibitor for treatment of HIV/AIDS patients who fail to respond to the current antiretroviral drugs. However, because T20 lacks the pocket-binding domain (PBD), it exhibits low anti-HIV-1 activity and short half-life. Therefore, several next-generation HIV fusion inhibitory peptides with PBD have been developed. They possess longer half-life and more potent antiviral activity against a broad spectrum of HIV-1 strains, including the T-20-resistant variants. Nonetheless, the clinical application of these peptides is still limited by the lack of oral availability and the high cost of production. Thus, development of small molecule compounds targeting the gp41 pocket with oral availability has been promoted. This review describes the main approaches for identification of HIV fusion/entry inhibitors targeting the gp41 pocket and summarizes the latest progress in developing these inhibitors as a new class of anti-HIV drugs.
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