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Search Results: 1 - 10 of 94961 matches for " YANG Feng-bao "
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Validating and Improving Interrill Erosion Equations
Feng-Bao Zhang, Zhan-Li Wang, Ming-Yi Yang
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0088275
Abstract: Existing interrill erosion equations based on mini-plot experiments have largely ignored the effects of slope length and plot size on interrill erosion rate. This paper describes a series of simulated rainfall experiments which were conducted according to a randomized factorial design for five slope lengths (0.4, 0.8, 1.2, 1.6, and 2 m) at a width of 0.4 m, five slope gradients (17%, 27%, 36%, 47%, and 58%), and five rainfall intensities (48, 62.4, 102, 149, and 170 mm h?1) to perform a systematic validation of existing interrill erosion equations based on mini-plots. The results indicated that the existing interrill erosion equations do not adequately describe the relationships between interrill erosion rate and its influencing factors with increasing slope length and rainfall intensity. Univariate analysis of variance showed that runoff rate, rainfall intensity, slope gradient, and slope length had significant effects on interrill erosion rate and that their interactions were significant at p = 0.01. An improved interrill erosion equation was constructed by analyzing the relationships of sediment concentration with rainfall intensity, slope length, and slope gradient. In the improved interrill erosion equation, the runoff rate and slope factor are the same as in the interrill erosion equation in the Water Erosion Prediction Project (WEPP), with the weight of rainfall intensity adjusted by an exponent of 0.22 and a slope length term added with an exponent of ?0.25. Using experimental data from WEPP cropland soil field interrill erodibility experiments, it has been shown that the improved interrill erosion equation describes the relationship between interrill erosion rate and runoff rate, rainfall intensity, slope gradient, and slope length reasonably well and better than existing interrill erosion equations.

YANG Feng-Bao,NI Guo-Qiang,JING Shao-Wei,

红外与毫米波学报 , 2009,
Abstract: 提出了基于lαβ颜色空间变换和小波包变换的红外中波细分波段图像的伪彩色增强方法.利用lαβ变换将两个细分波段RGB彩色映射的伪彩色图像的颜色和亮度信息分离,通过二维小波包变换得到两个细分波段的融合图像,将融合图像和颜色信息经过lαβ逆变换形成伪彩色增强图像.实验结果表明,同简单彩色映射图像相比,伪彩色增强图像的局部标准偏差和局部熵都有增加,从而使图像具有更好的感知效果.

YANG Feng-Bao,LIN Su-Zhen,LENG Min,

红外与毫米波学报 , 2010,
Abstract: 提出了基于形态学分割和支持度变换的双色中波红外图像的融合方法.通过腐蚀膨胀操作、加权叠加实现两幅细分波段图像的局部处理,消除了第一细分波段图像的太阳照射饱和区,然后利用支持度变换对图像进行融合,将两幅图像的细节信息综合起来,使图像更清晰.实验结果表明:同小波包变换融合方法相比,经本文算法融合后的图像有效消除了太阳照射造成的饱和区,太阳影响参数降低了60.05%,局部标准偏差和局部粗糙度分别增加了2.59%和3.39%,处理时间缩短了66.77%,证明了融合方法的有效性.

YANG Feng-Bao,NI Guo-Qiang,ZHANG Lei,

红外与毫米波学报 , 2008,
Abstract: 分析了红外中波段的两个细分波段(3.4μm~4.μm和4.5μm~5.3μm)的成像特点,提出了基于二维小波包变换和局部能量的两个红外中波细分波段图像的融合算法.实验结果表明,融合图像同细分图像和未细分图像相比,标准偏差分别增加了6.47%和1.50%,多向粗糙度分别增加了4.82%和4.32%,而太阳影响参数分别下降了4.96%和9.03%,融合了两幅细分图像中比较清晰的信息,减少了太阳饱和区,证明了融合算法的有效性,说明了通过两个细分波段融合的方法可以获得比原中波波段成像效果更好的图像.
Optical Transmission Schemes for Focal-plane Data

YAO Jian-min,CHEN Si-ying,YANG Feng-bao,NI Guo-qiang,

红外 , 2007,
Abstract: To solve the problem that ordinary electrical wires used in dewar can easily lead to the increase of temperature, the optical transmission methods for transmitting the data from a focal plane to the outside of the dewar are studied according to the operation requirements of low temperature, low power consumption, high speed and small volume for cooled focal planes. The application of spatial light modulation and laser transmission methods in optical transmission are discussed, the corresponding schemes are designed and their advantages and shortcomings are pointed out. The experimental results have shown that the spatial light modulation method has the features of high speed and parallel transmission with a data transfer rate of up to 24Gbps, but its structure design is more complicated and higher power consumption is required. The laser transmission is a serial transmission with a data transfer rate of up to 2Gbps. It needs only a power consumption of 100mW and its structure is small and simple. So, the laser transmission method is a more practical data transfer method for cooled focal planes.
Fusion of dual color MWIR images with weak signal based on suprathreshold stochastic resonance

LIN Su-Zhen,YANG Feng-Bao,JI Lin-N,LI Xiang-Ting,LI Pan,

红外与毫米波学报 , 2011,
Abstract: A method on fusion of dual color mid-wave infrared (MWIR) images with weak signal is presented based on suprathreshold stochastic resonance (SSR). The weak signals of two images are enhanced by SSR respectively, and the noise of images is reduced with median filter. Then images denoised are fused by support value transform (SVT), and fusion image with more information and clear details is obtained. The experimental results show that local standard deviation, local entropy and peak signal to noise ratios of images obtained by the method proposed increase 247.7% , 45.52% , 6.71% and 6.65%, respectively. The validity of the method proposed is proved.
Ethernet Real-time Protocol for Measurement and Control Systems

ZENG Fan-zhi,LI Feng-bao,

计算机应用研究 , 2004,
Abstract: Proposes an Ethernet real-time protocol imitating field bus WorldFIP which makes possible its use at device level.It's implementation and performances are analyzed.And compares it with field bus WorldFIP.
Searching Information of Green Chemistry on Internet

GUAN Yi,LI He,TIAN Jian,ZHANG Feng-bao,

过程工程学报 , 2002,
Abstract: Based on the experience of searching the information of green chemistry on Internet and the screening analysis of the searching results from different search engines, the main green chemistry institutions and organizations, some key academic journals, research institutions in universities, and patent search engines related to green chemistry all over the world on Internet are introduced. Moreover, the most effective search engines are recommended to readers.
Effect of Nitric Acid on the Low Fluorescing Performance of Drilling Fluid Lubricant Based Animal and Vegetable Oils
Feng-shan Zhou,Zheng-qiang Xiong,Bao-lin Cui,Feng-bao Liu,Guang-huan Li,Jin-ran Wei,Hua Cui
Journal of Spectroscopy , 2013, DOI: 10.1155/2013/269280
Abstract: After synthesis of mixed fatty acid triethanolamine ester surfactant based on animal and vegetable mixed oils, the reaction solution was added into 4% (wt/wt) liquid nitric acid or 9% (wt/wt) solid nitric acid as eliminating fluorescent agent continuing to react from 1 to 2 hours. The low fluorescence lubricant named E167 for drilling fluid was prepared, in which maximum fluorescence intensity ( ) was less than 10 in three-dimensional fluorescence spectra of excitation wavelength range. When the E167 was added into fresh water based drilling fluid at the dosage of 0.5% (wt/wt), the sticking coefficient reduced rate ( ) is 78% and the extreme pressure (E-P) friction coefficient reduced rate ( ) is 79%. In the case of 4% brine mud with 0.5% (wt/wt) E167 in it, the and are 75% and 62%, respectively. After the hot rolling ageing test 180°C × 16?h with the E167 was added into fresh water based drilling fluid at the dosage of 1% (wt/wt), the and are greater than 70%, which shows a much better lubrication properties of strong resistance to high temperature. The fresh water based drilling fluid which contains 1% (wt/wt) E167 is almost nonfoaming even after hot rolling ageing 120°C × 16?h. 1. Introduction In the process of oil and gas drilling, in order to reduce the friction between drilling string and borehole, drilling string and casing, together with reducing the drill string torque and tripping resistance, lubricant often need to be added, thus avoiding sticking accident and improving the drilling speed. The most commonly used liquid lubricants for drilling fluid are mineral oils and vegetable oils. The mineral oils are difficult to biodegrade, which causes serious pollution problems to the environment, and the high grade of fluorescence is unfavorable for geological logging. In the case of vegetable oils, with properties of low toxicity, good biodegradability, resource renewability, and low fluorescence level, it is a kind of lubricant for environment friendly using as drilling fluid with promising application [1–7]. There are at least three problems in unmodified vegetable oils [8–12]: (1) the vegetable oils have low thermal stability in the process of hydrolysis, which are easy to saponify in alkaline environment, producing bubble of anion surfactant; (2) the adsorption consumption of water-soluble anion surfactant in the debris and borehole formation is larger than that of oil-soluble fat, which means that the consumption of lubricant after saponification is faster; namely, the lubricant after saponification is not durable; (3) with poor oxidation
Study on Heredity Laws of Keratin Membrane and Sugar Content in Semi-leafless Vegetable Pea and Their Utilization in Pea Breeding

WANG Feng-Bao,FU Jin-Feng,DONG Li-Feng,

遗传 , 2004,
Abstract: It was studied for the heredity laws of keratin membrane and sugar content in semi-leafless vegetable pea. The results showed that keratin membrane character is controlled by two genes. F1 displays large keratin membranes in all fresh pods; F2 has three phenotypes, i.e. large keratin membrane, small keratin membrane and no keratin membrane with the ratio of 9:6:1. Sugar content is quantitative character fitting normal distribution. 'Xucai 1', a new semi-leafless vegetable pea variety with high yield and quality was successfully bred according to the laws. Its fresh pods taste delicious. Its extremely developed tendrils can be sold as top grade Longxu vegetable. The tender stems and leaves are also high quality vegetable.
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