公路场景去雾技术研究

提出了一种应用单目机器视觉技术并结合Hough变换消失线检测和边界检测技术来构建距离深度图的方法,并应用衰减-空气光去雾模型对图像进行了恢复. 结果表明,采用该方法恢复的道路图像色彩自然,模型与实际道路完全匹配,对于不同距离的景物都具有良好的恢复效

脉冲电晕等离子体下甲烷偶联反应研究金属氧化物的多相催化作用

考察了常温常压脉冲电晕等离子体作用下金属氧化物对甲烷脱氢偶联反应的催化作用, 观察到不同催化剂在脉冲电晕等离子体作用下的催化活性差别很大, 且对C_2产物的分布具有一定的调变作用。γ-Mn_2O_3/γ-Al_2O_3催化剂的C_2烃收率较空白载体提高了近2倍,C_2烃选择性提高30%以上, 该催化剂与脉冲电晕等离子体的结合可使其能量效率提高2倍以上。提出了一种等离子体催化作用促进甲烷脱氢偶联反应的初步模型

脉冲电晕等离子体下甲烷偶联反应研究金属氧化物的多相催化作用

考察了常温常压脉冲电晕等离子体作用下金属氧化物对甲烷脱氢偶联反应的催化作用, 观察到不同催化剂在脉冲电晕等离子体作用下的催化活性差别很大, 且对C_2产物的分布具有一定的调变作用。γ-Mn_2O_3/γ-Al_2O_3催化剂的C_2烃收率较空白载体提高了近2倍,C_2烃选择性提高30%以上, 该催化剂与脉冲电晕等离子体的结合可使其能量效率提高2倍以上。提出了一种等离子体催化作用促进甲烷脱氢偶联反应的初步模型

脉冲电晕等离子体作用下甲烷偶联反应无氧气氛下

在常温压下，对脉冲电晕等离子体应用于甲烷无氧气氛下脱氢偶联反应进行了研究。考察了脉冲电压极性和等离子体注入能量对甲烷脱氢偶联反应的影响，并引入能量效率对等离子体能量与甲烷脱氢偶联反应的耦合进行了讨论。结果表明，正电晕的能量效率高于负电晕

对虾病害发生的原因调查及对策分析

本文报道了1993年和1994年在山东烟台地区养殖对虾发生严重流行病原因的调查结果,着重从养殖环境和饲养管理技术上分析产生疾病的原因,提出了在养殖过程中增强对虾体质、预防疾病的七项措施

Preparation of Cell-Embedded Colloidosomes in an Oil-in-Water Emulsion

National Nature Science Foundation of China [21376194, 21076170]; research fund for the Priority Areas of Development in Doctoral Program of Higher Education [20130121130006]Cell encapsulation by locking the interfacial microgels in a water-in-oil Pickering emulsion has currently been attracting intensive attention because of the biofriendly reaction condition. Various kinds of functional microgels can only stabilize an oil-in-water Pickering emulsion, and it is thus difficult to encapsulate cells in the emulsion where the cells are usually dispersed in the continuous phase. Herein, we introduce a facile method for preparing cell-embedded colloidosomes in an oil-in-water emulsion via polyelectrolyte complexation. Escherichia coli (E. coli) was chosen as a model cell and embedded in the thin shell of chitosan/poly(N-isopropylacrylamide-co-acrylic acid) (P(NIPAM-co-AAc)) microcapsules. This is beneficial for expressing cell function because of the little resistance of mass exchange between the embedded cells and the external environment. Cells can be used in biocatalysis or biomedicine and our product will hold great promises to improve the performance in those fields. The synthesis route presents a platform to prepare cell-embedded microcapsules in an oil-in-water Pickering emulsion in a facile and biocompatible way. First, an emulsion stabilized by P(NIPAM-co-AAc) microgels was prepared. Then, the interfacial microgels in the emulsion were locked by chitosan to form colloidosomes. The mechanism of cell encapsulation in this system was studied via fluorescent labeling. The viability of E. coli after encapsulation is ca. 90%. Encapsulated E. coil is able to metabolize glucose from solution, and exhibits a slower rate than free E. coil. This demonstrates a diffusion constraint through the colloidosome shell

Facile preparation of homogeneous polyelectrolyte complex membranes for separation of methanol/methyl tert-butyl ether mixtures

National Nature Science Foundation of China [20976145, 21076170]; Nature Science Foundation of Fujian Province of China [2009J01040, 2010I0013]; research fund for the Doctoral Program of Higher Education [20090121110031]Facile preparation of homogeneous polyelectrolyte complex membranes (PECMs) based on sulfonated polyarylethersulfone with cardo (SPES-C) and polyethyleneimine (PEI) is reported in this work. The PECMs were characterized using Fourier transform infrared (FTIR), scanning electron microscopy (SEM), X-ray diffraction (XRD), thermogravimetric analysis (TGA) and contact angle metering. The FTIR results confirmed the acid-base crosslinking between SPES-C and PEI. With increasing PEI content, both the hydrophilicity and the amorphous region of the PECMs increased. The effect of PEI content On the degree of swelling and separation performance of the PECMs was investigated. PECM-16 was found to have the optimum performance. A flux of 0.194 kg m(-2) h(-1) and a separation factor of 1860 at 40 degrees C were achieved in pervaporation of 15 wt methanol/methyl tert-butyl ether mixture. (c) 2013 Elsevier B.V. All rights reserve

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel

JUNO sensitivity on proton decay p → ν K + searches*

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the $p\to \bar{\nu} K^+$ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar{\nu} K^+$ is 36.9% ± 4.9% with a background level of $0.2\pm 0.05({\rm syst})\pm$$0.2({\rm stat})$ events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is $9.6 \times 10^{33}$ years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies