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Search Results: 1 - 10 of 23980 matches for " Luoluo Jiang "
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Ultra accurate personalized recommendation via eliminating redundant correlations
Tao Zhou,Riqi Su,Runran Liu,Luoluo Jiang,Bing-Hong Wang,Yi-Cheng Zhang
Physics , 2008, DOI: 10.1088/1367-2630/11/12/123008
Abstract: In this paper, based on a weighted projection of bipartite user-object network, we introduce a personalized recommendation algorithm, called the \emph{network-based inference} (NBI), which has higher accuracy than the classical algorithm, namely \emph{collaborative filtering}. In the NBI, the correlation resulting from a specific attribute may be repeatedly counted in the cumulative recommendations from different objects. By considering the higher order correlations, we design an improved algorithm that can, to some extent, eliminate the redundant correlations. We test our algorithm on two benchmark data sets, \emph{MovieLens} and \emph{Netflix}. Compared with the NBI, the algorithmic accuracy, measured by the ranking score, can be further improved by 23% for \emph{MovieLens} and 22% for \emph{Netflix}, respectively. The present algorithm can even outperform the \emph{Latent Dirichlet Allocation} algorithm, which requires much longer computational time. Furthermore, most of the previous studies considered the algorithmic accuracy only, in this paper, we argue that the diversity and popularity, as two significant criteria of algorithmic performance, should also be taken into account. With more or less the same accuracy, an algorithm giving higher diversity and lower popularity is more favorable. Numerical results show that the present algorithm can outperform the standard one simultaneously in all five adopted metrics: lower ranking score and higher precision for accuracy, larger Hamming distance and lower intra-similarity for diversity, as well as smaller average degree for popularity.
In Vivo and In Vitro Suppression of Hepatocellular Carcinoma by EF24, a Curcumin Analog
Haitao Liu, Yingjian Liang, Luoluo Wang, Lantian Tian, Ruipeng Song, Tianwen Han, Shangha Pan, Lianxin Liu
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0048075
Abstract: The synthetic compound 3,5-bis(2-flurobenzylidene)piperidin-4-o?ne(EF24) is a potent analog of curcumin that exhibits enhanced biological activity and bioavailability without increasing toxicity. EF24 exerts antitumor activity by arresting the cell cycle and inducing apoptosis, suppressing many types of cancer cells in vitro. The antiproliferative and antiangiogenic properties of EF24 provide theoretical support for its development and application to liver cancers. We investigated the in vitro and in vivo activities of EF24 on liver cancer to better understand its therapeutic effects and mechanisms. EF24 induced significant apoptosis and G2/M-phase cell cycle arrest in mouse liver cancer cell lines, Hepa1-6 and H22. The expression levels of G2/M cell cycle regulating factors, cyclin B1 and Cdc2, were significantly decreased, pp53, p53, and p21 were significantly increased in EF24-treated cells. In addition, EF24 treatment significantly reduced Bcl-2 concomitant with an increase in Bax, enhanced the release of cytochrome c from the mitochondria into the cytosol, resulting in an upregulation of cleaved-caspase-3, which promoted poly (ADP-ribose) polymerase cleavage. EF24-treated cells also displayed decreases in phosphorylated Akt, phosphorylated extracellular signal-regulated kinase and vascular endothelial growth factor. Our in vitro protein expression data were confirmed in vivo using a subcutaneous hepatocellular carcinoma (HCC) tumor model. This mouse HCC model confirmed that total body weight was unchanged following EF24 treatment, although tumor weight was significantly decreased. Using an orthotopic HCC model, EF24 significantly reduced the liver/body weight ratio and relative tumor areas compared to the control group. In situ detection of apoptotic cells and quantification of Ki-67, a biomarker of cell proliferation, all indicated significant tumor suppression with EF24 treatment. These results suggest that EF24 exhibits anti-tumor activity on liver cancer cells via mitochondria-dependent apoptosis and inducing cell cycle arrest coupled with antiangiogenesis. The demonstrated activities of EF24 support its further evaluation as a treatment for human liver cancers.
Comparison of the Water Quality between the Surface Microlayer and Subsurface Water in Typical Water Bodies in Sichuan  [PDF]
Jiang Yu
Journal of Water Resource and Protection (JWARP) , 2010, DOI: 10.4236/jwarp.2010.210101
Abstract: Investigation and assessment of water quality status in the surface microlayer (SML) and subsurface water (SSW) in several kinds of typical water bodies in Sichuan were carried out from May to June 2010.The results showed that N, P were enriched to some extent at SML in Xichi pool, Funan River and Longquan reservoir, which made concentrations of the indexes such as total nitrogen (TN), total phosphorus (TP), chemical oxygen demand (COD)of SML be much higher than those of SSW (P<0.05), and the exceeding rates were up to 100%. The contents of TN,TP,COD of SML and SSW in Xichi pool, and Funan River exceeded III even Ⅳlevel of water quality standard, while these indexes in Longquan reservoir were lower than Ⅲ or Ⅱlevel of water quality standard. Though Chl. a mass concentration at SML and SSW in Funan River was prominently lower than those in Xichi pool and Longquan reservoir, according to the eutrophic evaluation standard, the water bodies of SML and SSW in Funan River and Xichi pool were in middle eutrophication, the highest index of eutrophication (E value) was up to 66.78, while there was light entuophic in Longquan reservoir, and there had obvious difference with E value and COD, TP, TN (P<0.05). This research shows that the water quality of Longquan reservoir is generally well. While Funan River is a middle eutrophication, and its pollution is more serious than Xichi pool, the two waters belong to national III even IV level, and SML has the capability of enrichment to the pollutants such as N, P.
Power Management Integrated Circuit with 90Plus Efficiency Used in AC/DC Converter  [PDF]
Yanfeng JIANG
Energy and Power Engineering (EPE) , 2009, DOI: 10.4236/epe.2009.12016
Abstract: Recently, resonant AC/DC converter has been accepted by the industry. However, the efficiency will be decreased at light load. So, a novel topology with critical controlling mode combined with resonant ones is proposed in this paper. The new topology can correspond to a 90 plus percent of power converting. So,a novel topology of an state of-art integrated circuit, which can be used as power management circuit, has been designed based on the above new topology. A simulator which is specific suitable for the power controller has been founded in this work and it has been used for the simulation of the novel architecture and the proposed integrated circuit.
Limit Cycle Bifurcations in a Class of Cubic System near a Nilpotent Center  [PDF]
Jiao Jiang
Applied Mathematics (AM) , 2012, DOI: 10.4236/am.2012.37115
Abstract: In this paper we deal with a cubic near-Hamiltonian system whose unperturbed system is a simple cubic Hamiltonian system having a nilpotent center. We prove that the system can have 5 limit cycles by using bifurcation theory.
China’s Forensic System: Critical Comments on the “Latest” Flaw  [PDF]
Jiang Na
Chinese Studies (ChnStd) , 2014, DOI: 10.4236/chnstd.2014.33013
Abstract: The article will critically examine the fundamental flaws that have been newly discovered from the “latest” case studies. In recent decades, numerous miscarriages of justice have occurred in China mainly due to the insufficient or improper use of forensic evidence. Comments on the “latest” flaw will start from an overview of the notorious wrongful conviction in Case ZHANG Gaoping and ZHANG Hui whose exonerations in 2013 were based on the proper use of forensic techniques such as DNA testing. The case highlights the injustice that results when forensic evidence is ignored in favour of wrongful confessions extorted under police torture. It has been suggested that China’s several waves of forensic science reform cannot lead the current forensic identification to objective, fair or reliable forensic evidence. The “latest” founded flaw entrenched in its forensic system failed to be solved by technical, financial, administrative or legal progress only. In essence, the 2005 reform on forensic identification is flawed to its core, albeit being recently identified. This is primarily because in law forensic experts inside police can conduct identification to provide forensic evidence on cases investigated by police, which cannot ensure necessary check or balance to prevent or reduce forensic errors in practice.
Impacts of China’s Strike Hard Policy on Forensic Evidence  [PDF]
Jiang Na
Chinese Studies (ChnStd) , 2014, DOI: 10.4236/chnstd.2014.32010
Abstract: The media has reported numerous miscarriages of justice in China, some of which directly result from errors in forensic evidence as a main cause. Given that such miscarriages occurred under the influence of China’s Strike Hard Policy, empirical studies on its impact on forensic evidence, par-ticularly that leading to miscarriages of justice will be conducted at multiple levels with diverse research methods. The old policy officially took effect mainly from 1983 to 2005, when problems in forensic evidence significantly produced more miscarriages of justice. The old policy’s impact on forensic evidence will be further explored based on data that were collected from experiments conducted with 394 questionnaires and 100 judges in four sample cities, just before and after the old policy was replaced with a balanced policy in late 2005. Surveys to elicit the traits of forensic identification were used, as well as the exogenous imposition of the old policy to identify its negative impacts on forensic evidence, combined with new policy effects. The 2005 reform towards balancing leniency and severity is essentially inadequate to prevent errors in forensic evidence.
How Does Growth Follow Differential Convergence Patterns? A Study of the Chinese Regions and Sectors  [PDF]
Yanqing Jiang
Theoretical Economics Letters (TEL) , 2014, DOI: 10.4236/tel.2014.48090
Abstract: This paper focuses on examining differential convergence patterns in productivity growth in China. Our empirical analysis shows that the Chinese provinces exhibit absolute divergence and then absolute convergence respectively during 1990-2000 and 2000-2010. In addition, absolute convergence is present during 1985-1995 and 2000-2010 in the primary sector and during 1995-2010 in the secondary sector. Our regressions also show that either for the overall regional economy, or for any individual sector, growth in labor productivity exhibits strong convergence. Besides the convergence trends, we also find that the secondary and tertiary sectors have grown significantly faster than the primary sector.
Intonation Metaphor  [PDF]
Canzhong Jiang
Open Journal of Modern Linguistics (OJML) , 2014, DOI: 10.4236/ojml.2014.44042
Abstract: As an important concept in Systemic Functional Grammar (SFG), grammatical metaphor can be categorized into ideational metaphor, interpersonal metaphor, arguably logical metaphor and textual metaphor on the basis of metafunctions. Ever since its initiation, grammatical metaphor, ideational metaphor in particular, has captured extensive attention from scholars throughout the world and various aspects including its categorization, motivation, realization, meaning and so on have been investigated. However, viewed from the perspective of language system, previous studies have been mainly focused on the stratum of lexicogrammar. Few have been directed at the phonological stratum which realizes lexicogrammar. It is suggested that phonological stratum also manifests such a metaphorical phenomenon. This paper will attempt to conduct an investigation on what we call intonation metaphor in this stratum in terms of its realization, motivation, semantics and functions. In addition, relationships among metaphors on the three linguistic strata will also be tentatively investigated.
Spatial Distribution of Foreign Direct Investment and Productivity Growth in Less Developed Regions of China  [PDF]
Yanqing Jiang
American Journal of Industrial and Business Management (AJIBM) , 2014, DOI: 10.4236/ajibm.2014.411070
Abstract: This study examines how the spatial distribution of foreign direct investment (FDI) affects productivity growth in less developed regions of China. A systematic theoretical framework is set up concerning the potential effects of FDI capital via different channels. Following the theoretical framework, this study presents empirical evidence showing that FDI spillovers from the developed regions play a crucial role in enhancing productivity growth in the less developed regions. Empirical results also show that local FDI spillovers in less developed regions promote local productivity growth. In addition, FDI spillovers from less developed regions are not shown to have a significant effect on productivity growth in other less developed regions.
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