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Search Results: 1 - 10 of 19742 matches for " Ling Mao "
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Dot size effects of nanocrystalline germanium on charging dynamics of memory devices
Ling-Feng Mao
Nanoscale Research Letters , 2013, DOI: 10.1186/1556-276X-8-21
Abstract: The dot size of nanocrystalline germanium (NC Ge) which impacts on the charging dynamics of memory devices has been theoretically investigated. The calculations demonstrate that the charge stored in the NC Ge layer and the charging current at a given oxide voltage depend on the dot size especially on a few nanometers. They have also been found to obey the tendency of initial increase, then saturation, and lastly, decrease with increasing dot size at any given charging time, which is caused by a compromise between the effects of the lowest conduction states and the capacitance of NC Ge layer on the tunneling. The experimental data from literature have also been used to compare and validate the theoretical analysis.
Improving Human Detection Operators by Dimensionality Reduction
Ling Mao,Mei Xie
Information Technology Journal , 2012,
Abstract: Approaches based on Haar wavelets and Histograms of Oriented Gradients (HOG) are very successful in human detection. However, the dimensions of features extracted based on both of the operators are very high which often causes low computation efficiency and needs more memory. Usually these high-dimensional features contain redundant information which would deteriorate the performance. To conquer these problems, we proposed a new algorithm based on Partial Least Squares (PLS) technique to extract a few latent variables from original Haar wavelet features or HOG features which contain most useful information and basically no noise, in other words, these new latent variables provide higher discriminatory power than original features. Therefore, the proposed method could save memory space, reduce computation cost and improve the performance of original operators. Additionally, we design a method to get the optimal number of feature dimensions. The experiments conducted on three varied datasets including Massachusetts Institute of Technology (MIT), Institut National de Recherche en Informatique et en Automatique (INRIA) and DaimlerChrysler human datasets show that our method based on PLS obtains better discrimination results than Principal Components Analysis and outperforms original operators.
Five new species of genus Cryptopimpla Taschenberg (Hymenoptera, Ichneumonidae) with a key to species known in China
Mao-Ling Sheng
ZooKeys , 2011, DOI: 10.3897/zookeys.117.1302
Abstract: Eight species of genus Cryptopimpla Taschenberg, 1863, distributing in China are reported. five of them are new to science: C. flavipedalis Sheng, sp. n., collected from Ningxia Hui Autonomous Region, and C. rufipedalis Sheng, sp. n. collected from Jilin Province, the palearctic part of China. C. carinifacialis Sheng, sp. n., C. flavifacialis Sheng, sp.n. and C. maculifacialis Sheng, sp. n. were collected from Jiangxi Province, the oriental part of China. A key to the species of genus Cryptopimpla Taschenberg known in China is provided.
Multiclass Image Segmentation Based on Pixel and Segment Level
Ling Mao,Mei Xie
Research Journal of Applied Sciences, Engineering and Technology , 2013,
Abstract: Multi-class image segmentation (or pixel labeling) is one of the most important and challenging tasks in computer vision. Currently, many different methods for this task can be broadly categorized into two types according to their choice of the partitioning of the image space, i.e., pixels or segments. However, each choice of the two types of methods comes with its share of advantages and disadvantages. In this study, we construct a novel CRF model to integrate features extracted from pixel and segment levels. We exploit segments generated by Constrained Parametric Min Cuts (CPMC) algorithm in the proposed framework, instead of commonly used unsupervised segmentation method (e.g., mean-shift approach). Additionally, the recognition based on these segments is also integrated into the model, which possible corrects classification mistakes caused by the unary term based on information derived from pixel level. We experimentally demonstrate our model’s quantitative and qualitative improvements over the baseline methods.
Semantic Segmentation with Same Topic Constraints
Ling Mao,Mei Xie
Research Journal of Applied Sciences, Engineering and Technology , 2013,
Abstract: A popular approach to semantic segmentation problems is to construct a pair wise Conditional Markov Random Field (CRF) over image pixels where the pair wise term encodes a preference for smoothness within pixel neighborhoods. Recently, researchers have considered higher-order models that encode local region or soft non-local constraints (e.g., label consistency or co-occurrence statistics). These new models with higher-order terms have significantly pushed the state-of-the-art for semantic segmentation problems. In this study, we consider a novel non-local constraint that enforces consistent pixel labels among those image regions having the same topic. These topics are discovered by Probabilistic Latent Semantic Analysis model (PLSA). We encode this constraint as a robust Pn higher-order potential among all the image regions of the same topic in a unified CRF model. We experimentally demonstrate quantitative and qualitative improvements over a refined baseline unary and pair wise CRF models.


中国物理 B , 1992,
Abstract: Based on collisional and radiative processes occurring in the inductively coupled plasma, non-Boltzmann energy level distributions of argon atoms are calculated under various conditions, by using ideal gas law and solving rate equations.
A new species of the genus Palpostilpnus Aubert (Hymenoptera, Ichneumonidae, Cryptinae) from the Oriental part of China
Mao-Ling Sheng,Gavin Broad
ZooKeys , 2011, DOI: 10.3897/zookeys.108.1123
Abstract: Palpostilpnus brevis Sheng & Broad, sp.n., belonging to the tribe Phygadeuontini of the subfamily Cryptinae (Hymenoptera, Ichneumonidae), collected from Jiangxi Province, China, is described. A key to the described species of the genus Palpostilpnus Aubert, 1961, is provided.
Review of Tersilochinae (Hymenoptera, Ichneumonidae) of China, with descriptions of four new species
Andrey Khalaim,Mao-Ling Sheng
ZooKeys , 2009, DOI: 10.3897/zookeys.14.141
Abstract: General data on distribution and available host records are provided for the seventeen known Chinese species of Tersilochinae, distributed in five genera. Four species, Diaparsis (Diaparsis) nitidulentis sp. n., Probles (Euporizon) vulnificus sp. n., Tersilochus (Tersilochus) ningxiator sp. n. and T. (T.) runatus sp. n., are described from Ningxia Hui Autonomous Region of China. Diaparsis rara Horstmann and the subgenus Rugodiaparsis Horstmann of the genus Probles F rster are recorded from China for the first time.
Circulating Lymphocyte Subsets in Patients with Lung Cancer and Their Prognostic Value
Jun LUO,Zhiqiang LING,Weimin MAO
Chinese Journal of Lung Cancer , 2011, DOI: 10.3779/j.issn.1009-3419.2011.08.06
Abstract: Background and objective Lung cancer is one of the most common malignancies. The aim of this study is to investigate the relationship between the change of lymphocyte subsets in the peripheral blood of lung cancer patients and the survival rate. Methods Flow cytometry was used to measure the percentages of lymphocyte subsets (CD3+, CD4+, CD8+, CD4+/CD8+, CD19+, CD25+, CD44+, and NK cells) in peripheral blood obtained from 221 patients with primary lung cancer without any treatment and from 96 healthy blood donors as the control group. The result was combined with clinical and follow-up data and statistical analysis was conducted. Results The levels of CD3+ and CD8+ in the patient group are significantly lower compared with the control group, whereas the levels of CD4+/CD8+, CD19+, CD25+, CD44+, and NK cells are significantly higher (P<0.05). CD8+ is significantly higher in the small cell lung cancer (SCLC) group compared with the non-small cell lung cancer (NSCLC) group. However, CD4+ and CD4+/CD8+ are lower in SCLC (P<0.05). There were no significant differences in different stages and differentiation (P>0.05) in the NSCLC group. The level of CD3+ was significantly higher compared with the pre-chemotherapy group, but NK cell, CD19+, and CD44+ were distinctly lower in the post-chemotherapy group (P<0.05). More survival opportunities will be obtained for patients with no increase in CD44+ after chemotherapy (P=0.021), but the other three indices have no obvious influence on survival. Conclusion Widespread changes of lymphocyte occur in the peripheral blood of patients with lung cancer. There is a significant correlation between the change of CD44+ and the prognosis after chemotherapy.
An Investigation of Two Highest Ozone Episodes During the Last Decade in New England
Tzu-Ling Lai,Robert Talbot,Huiting Mao
Atmosphere , 2012, DOI: 10.3390/atmos3010059
Abstract: This study examined the role of meteorological processes in two of the highest ozone (O 3) episodes within the last decade at monitoring sites in southern New Hampshire (NH), USA. The highest O 3 levels occurred on 14 August 2002 at Thompson Farm (TF) and 22 July 2004 at Castle Springs (CS). Ozone mixing ratios in the 2002 episode showed continual high values (>100 ppbv) at the beginning of the episode, and reached 151 ppbv on 14 August. The 2004 episode consisted of one day of high O 3 (>100 ppbv) on 22 July at CS with the peak level of 111 ppbv. Our analysis suggested that the August 2002 high O 3 event at TF occurred under stagnant synoptic high-pressure conditions that prevailed over the entire eastern USA for an unusually extended time period. The clear skies and stable meteorological conditions resulted in accumulation of pollutants in the boundary layer. At the same time, the mesoscale low-level-jet (LLJ) played an important role in transporting air masses from the polluted Mid-Atlantic areas to the Northeast. Local land-sea-breeze circulations also added to the impact of this event. Our examination showed that the unprecedented high levels of O 3 on 22 July 2004 at CS was driven by two mechanisms, stratospheric intrusion and the Appalachian lee trough (APLT), which was not found during other O 3 episodes at the site in the decade long data record. This study demonstrated that unusually high O 3 levels at New England rural sites were driven by multi-scale processes, and the regional/local scale processes controlled the magnitude and timing of the local pollution episodes.
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