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Article ; Online: Enhancement of Radio Frequency Plasma Plume by Pulsed Plasma Bullet at Atmospheric Pressure

Qianhan Han / Ying Guo / Yarong Zhang / Jing Zhang / Jianjun Shi

Applied Sciences, Vol 12, Iss 5430, p

2022 Volume 5430

Abstract: An experimental study of a plasma plume generated by radio frequency atmospheric pressure glow discharge and enhanced in terms of plume length and intensity by pulsed discharge is presented. When injecting a pulsed plasma bullet into the radio frequency ... ...

Abstract	An experimental study of a plasma plume generated by radio frequency atmospheric pressure glow discharge and enhanced in terms of plume length and intensity by pulsed discharge is presented. When injecting a pulsed plasma bullet into the radio frequency plasma plume, the length of the plasma plume into ambient air can be elongated from 2 mm to 6 mm and the intensity of the plasma plume can be elevated by four times. The propagation of the pulsed plasma bullet and the interaction with radio frequency discharge and plume are demonstrated by the temporal evolution of the discharge spatial appearance. The enhanced plasma plume is employed to improve the O/C ratio of carbon fiber, which is attributed to the synergistic effect of the radio frequency plasma plume and pulsed plasma bullet.
Keywords	atmospheric pressure glow discharge ; pulse discharge ; radio frequency ; plasma plume ; Technology ; T ; Engineering (General). Civil engineering (General) ; TA1-2040 ; Biology (General) ; QH301-705.5 ; Physics ; QC1-999 ; Chemistry ; QD1-999
Subject code	600
Language	English
Publishing date	2022-05-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Study on Critical Damage Width of Parallel Double-Free Surface Blasting

Jianjun Shi / Xiaopeng Miao / Haili Meng / Huaming An / Wei Zhang

Frontiers in Earth Science, Vol

2022 Volume 10

Abstract: Reserved rock wall is usually used in blasting operation when one side has an important protection object. Rock wall demolition blasting was essentially a parallel double-free surface blasting; blasting is the ideal effect of casting a side fully broken ... ...

Abstract	Reserved rock wall is usually used in blasting operation when one side has an important protection object. Rock wall demolition blasting was essentially a parallel double-free surface blasting; blasting is the ideal effect of casting a side fully broken rock mass, throwing, on the other side (protection) of rock mass at the injury status of “broken and do not come loose”; the minimum thickness of the rock wall last could hole to protect the width of side of the free surface, called the critical damage width. First, based on the theory of multi-boundary blasting, the relationship among the throwing effect, boundary condition, and charge quantity of parallel double-free surface blasting is expounded in this article. The model of equivalent sub-charge package was established to deduce the relationship of bilateral resistance lines, and the theoretical value of critical damage width was 2.05 W (minimum resistance line). Second, according to the rock wall demolition and blasting of the Yangtou station renovation project in the second line of Yuhuai, the critical damage width of 2.5 W was measured through a single row and hole-by-hole detonation field test. The results of study on critical damage width of parallel double-free surface blasting can provide theoretical guidance for similar projects.
Keywords	rock blasting ; critical damage ; free surface ; blasting excavation ; rock wall collapse ; Science ; Q
Subject code	621
Language	English
Publishing date	2022-07-01T00:00:00Z
Publisher	Frontiers Media S.A.
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: A Robot Pose Estimation Optimized Visual SLAM Algorithm Based on CO-HDC Instance Segmentation Network for Dynamic Scenes

Jinjie Chen / Fei Xie / Lei Huang / Jiquan Yang / Xixiang Liu / Jianjun Shi

Remote Sensing, Vol 14, Iss 2114, p

2022 Volume 2114

Abstract: In order to improve the accuracy of visual SLAM algorithms in a dynamic scene, instance segmentation is widely used to eliminate dynamic feature points. However, the existing segmentation technology has low accuracy, especially for the contour of the ... ...

Abstract	In order to improve the accuracy of visual SLAM algorithms in a dynamic scene, instance segmentation is widely used to eliminate dynamic feature points. However, the existing segmentation technology has low accuracy, especially for the contour of the object, and the amount of calculation of instance segmentation is large, limiting the speed of visual SLAM based on instance segmentation. Therefore, this paper proposes a contour optimization hybrid dilated convolutional neural network (CO-HDC) algorithm, which can perform a lightweight calculation on the basis of improving the accuracy of contour segmentation. Firstly, a hybrid dilated convolutional neural network (HDC) is used to increase the receptive field, which is defined as the size of the region in the input that produces the feature. Secondly, the contour quality evaluation (CQE) algorithm is proposed to enhance the contour, retaining the highest quality contour and solving the problem of distinguishing dynamic feature points from static feature points at the contour. Finally, in order to match the mapping speed of visual SLAM, the Beetle Antennae Search Douglas–Peucker (BAS-DP) algorithm is proposed to lighten the contour extraction. The experimental results have demonstrated that the proposed visual SLAM based on the CO-HDC algorithm performs well in the field of pose estimation and map construction on the TUM dataset. Compared with ORB-SLAM2, the Root Mean Squared Error (Rmse) of the proposed method in absolute trajectory error is about 30 times smaller and is only 0.02 m.
Keywords	visual SLAM ; instance segmentation ; neural network ; pose estimation ; Science ; Q
Subject code	629
Language	English
Publishing date	2022-04-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Friedel–Crafts reaction of indoles for (3-indolyl)methyl ethers under basic condition

Zubiao Zheng / Daoxin Zha / Peng Cui / Huan Zhang / Changjiang Li / Jianjun Shi / Bingbing Han

Results in Chemistry, Vol 3, Iss , Pp 100247- (2021)

Application in unsymmetrical bis(indolyl)methanes

2021

Abstract: An efficient process to prepare (3-indolyl)methyl ethers from various indoles and benzaldehydes under basic conditions was reported. The effects of bases, solvents were investigated. Under the optimal condition, most of (3-indolyl)methyl ethers were ... ...

Abstract	An efficient process to prepare (3-indolyl)methyl ethers from various indoles and benzaldehydes under basic conditions was reported. The effects of bases, solvents were investigated. Under the optimal condition, most of (3-indolyl)methyl ethers were obtained in 90–98% yields. The utility of the (3-indolyl)methyl ethers was further demonstrated to successfully produce unsymmetrical bis(indolyl) methanes(BIMs) with good yields.
Keywords	Chemistry ; QD1-999
Language	English
Publishing date	2021-01-01T00:00:00Z
Publisher	Elsevier
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Inhibition of ASC enhances the protective role of salvianolic acid A in traumatic brain injury via inhibition of inflammation and recovery of mitochondrial function

Jing Wang / Chao Xu / Kunhu Zhang / Jianjun Shi / Zhenyang Liu / Xinxing Wang / Min Guo / Jiannan Lv / Xinmin Ding

Folia Neuropathologica, Vol 59, Iss 1, Pp 50-

2021 Volume 66

Abstract: More than 50 million people are affected by traumatic brain injury (TBI) each year around the world, and nearly half of the population worldwide will have one or more TBI(s) in their lifetime. And in 2017, more than 1.39 billion people in China suffered ... ...

Abstract	More than 50 million people are affected by traumatic brain injury (TBI) each year around the world, and nearly half of the population worldwide will have one or more TBI(s) in their lifetime. And in 2017, more than 1.39 billion people in China suffered from TBI, representing nearly 18% of the world population; these were mainly caused by road traffic incidents. Salvianolic acid A is a compound obtained from Salvia miltiorrhiza Bunge, which is one of the active components of many traditional Chinese medicines for the treatment of cardiovascular and cerebrovascular disease, with the effect of inhibition of inflammatory response. ASC is a critical factor in the activation of inflammation response process via promoting the maturation of caspase-1, and activation of NLPR3 under bacterial infection promotes the necrosis of cells in an ASC-dependent manner. However, few studies focus on the effect of ASC in a TBI model. In this study, we found that inhibition of ASC reduced the expression of inflammatory cytokines, and the concentration of calcium and ROS, while it increased the expression of mitochondrial function-related proteins. We further noticed that these effects were regulated by DLK2/MLK3/JNK signalling pathway and might contribute to the treatment of TBI.
Keywords	asc ; salvianolic acid a ; traumatic brain injury ; inflammation ; mitochondria ; signalling pathway ; Medicine ; R
Subject code	570
Language	English
Publishing date	2021-03-01T00:00:00Z
Publisher	Termedia Publishing House
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Plant functional types drive differential responses of grassland ecosystem functions along a precipitation gradient

Zhen Cheng / Zeng Cui / Jianjun Shi / Yu Liu / Kimberly J. La Pierre / Gao-Lin Wu

Ecological Indicators, Vol 133, Iss , Pp 108433- (2021)

2021

Abstract: Climatic variations can profoundly impact the functioning of grassland ecosystem, and understanding the drivers is critical for predicting ecosystem function under future climate. However, whether and how the responses of multiple grassland ecosystem ... ...

Abstract	Climatic variations can profoundly impact the functioning of grassland ecosystem, and understanding the drivers is critical for predicting ecosystem function under future climate. However, whether and how the responses of multiple grassland ecosystem functions to precipitation across spatial scales are controlled by the differential responses of the dominant plant functional types (PFT) remains unclear, mainly due to the scarcity of regional observational data. Here, we examined grassland ecosystem functions (aboveground plant biomass, belowground plant biomass, soil organic carbon, and total nitrogen) with different dominant plant functional types across 100 sites of four precipitation gradients in the Northeastern Qinghai-Tibetan Plateau by the moisture index. Across the broad precipitation gradient, higher mean annual precipitation significantly increased the plant species diversity and grassland ecosystem functions (aboveground plant biomass, soil organic C, and total N). From arid zone to humid zone, the above- and below-ground plant biomass allocation shifted to aboveground, and the trade-off between above- and below-ground plant biomass was the largest in semi-humid zone (0.13). Moreover, above- and below-ground plant biomass in arid, semi-arid, and semi-humid zones were driven by the grass-dominated communities (52%∼91%), while the humid zone was driven by the sedge- and forb- dominated communities (36%∼46%). The results of structural equational models further showed that the effects of precipitation on the ecosystem functions (soil organic carbon and total nitrogen) were mediated by either aboveground plant biomass (mainly in sedge-dominated communities) or species diversity (forb- and grass-dominated communities). These findings reveal that the asynchrony responses of different PFT-dominated communities to precipitation are altering grassland ecosystem functions, which provides the novel insight that plant functional group is particularly important for predicting ecosystem functioning under future ...
Keywords	Alpine grassland ; Ecosystem functioning ; Moisture index ; Plant functional type ; Spatial precipitation gradient ; Species diversity ; Ecology ; QH540-549.5
Language	English
Publishing date	2021-12-01T00:00:00Z
Publisher	Elsevier
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Activation kinetics and off-target effects of thymus-initiated cre transgenes.

Jianjun Shi / Howard T Petrie

PLoS ONE, Vol 7, Iss 10, p e

2012 Volume 46590

Abstract: The bacteriophage enzyme Cre is a site-specific recombinase widely used to delete loxP-flanked DNA sequences in lineage-specific fashion. Several mouse lines that direct Cre expression to lymphoid progenitors in the thymus have been established, but a ... ...

Abstract	The bacteriophage enzyme Cre is a site-specific recombinase widely used to delete loxP-flanked DNA sequences in lineage-specific fashion. Several mouse lines that direct Cre expression to lymphoid progenitors in the thymus have been established, but a side-by-side comparison of when they first become active, and/or their relative efficiency at various developmental stages, has been lacking. In this study, we evaluated these in four common Cre transgenic strains with thymus-initiated promoters (Lck, Cd2, or Cd4). We found that while all of them eventually labeled nearly all thymocytes, their kinetics were dramatically different, and other than Cd4[Cre], did not faithfully recapitulate the expression pattern of the corresponding endogenous gene. Perhaps even more importantly, while thymuses from some strains compared favorably to thymuses from control (Cre-negative) mice, we found that Cre expression could also result in off-target effects, including moderate to severe decreases in thymic cellularity. These effects occurred in the absence of loxP-flanked DNA target genes, and were dose and copy number dependent. Loss of cellularity was attributable to a specific decrease in CD4(+)8(+) immature cells, and corresponds to an increased rate of programmed cell death. In addition to a comprehensive analysis of activation kinetics in thymus-initiated Cre transgenes, our data show that Cre is toxic to CD4(+)8(+) cells in a dose-dependent fashion, and emphasize that the choice of thymus-initiated Cre strain is critically important for minimizing off-target effects of Cre.
Keywords	Medicine ; R ; Science ; Q
Subject code	570
Language	English
Publishing date	2012-01-01T00:00:00Z
Publisher	Public Library of Science (PLoS)
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Preparation of biodiesel oil-in-water nanoemulsions by mixed surfactants for bifenthrin formulation

Yan, Huiqiong / Chaoling Bao / Xiuqiong Chen / Changjiang Yu / Dulin Kong / Jianjun Shi / Qiang Lin

RSC advances. 2019 Apr. 15, v. 9, no. 21

2019

Abstract: Although several approaches have been reported on the development of nanoemulsions over the last few years, studies on the formation of biodiesel nanoemulsions for bifenthrin formulation by the low-energy phase inversion composition (PIC) method are ... ...

Abstract	Although several approaches have been reported on the development of nanoemulsions over the last few years, studies on the formation of biodiesel nanoemulsions for bifenthrin formulation by the low-energy phase inversion composition (PIC) method are still scarce. Herein, the preparation of oil-in-water (O/W) nanoemulsions suitable for pesticide application has been achieved in biodiesel by dissolving a bifenthrin/mixture of a non-ionic surfactant (NP-6) and an anionic surfactant (ABSCa)/water system by the PIC method. The mechanism of the formation of bifenthrin nanoemulsions by dripping the water phase into the oil–surfactant phase was exemplified via the pseudo-ternary phase diagram. The effects of the mass ratio of NP-6 and ABSCa, mROS, stirring rate, the addition rate of water and the emulsification temperature on the mean droplet size of the nanoemulsion were investigated by dynamic light scattering (DLS). In addition, the interfacial tension and the contact angle of bifenthrin nanoemulsions for the spraying application were investigated. The insecticidal activity of bifenthrin nanoemulsions against cabbage maggots was further studied. Moreover, the emulsion stability of the bifenthrin nanoemulsions against Ostwald ripening behavior was evaluated, and the long-term stability of the bifenthrin formulation was studied by the HPLC method to assess the shelf life of the pesticide formulation. Experimental results showed that the optimum emulsification conditions for the mass ratio of NP-6 and ABSCa, mROS, stirring rate, the addition rate of water and the emulsification temperature were respectively 5/5, 1.4, 8000 rpm, 0.7 mL min⁻¹ and 25 °C. The bifenthrin nanoemulsion with low interfacial tension and contact angle, easy adsorption on plant leaf surfaces and good shelf life has great potential for use as a pesticide formulation.
Keywords	Ostwald ripening ; adsorption ; anionic surfactants ; bifenthrin ; biodiesel ; contact angle ; droplet size ; emulsifying ; high performance liquid chromatography ; insecticidal properties ; leaves ; light scattering ; mixing ; nanoemulsions ; nonionic surfactants ; pesticide application ; shelf life ; spraying ; surface tension ; temperature
Language	English
Dates of publication	2019-0415
Size	p. 11649-11658.
Publishing place	The Royal Society of Chemistry
Document type	Article
ISSN	2046-2069
DOI	10.1039/c9ra00591a
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Foxn1[Cre] Expression in the Male Germline.

Jianjun Shi / Irina Getun / Bivian Torres / Howard T Petrie

PLoS ONE, Vol 11, Iss 11, p e

2016 Volume 0166967

Abstract: Foxn1 (forkhead box N1), also known as the nude gene or winged-helix nude (Whn), is a forkhead transcription factor thought to be restricted to keratinocytes in the skin and thymus. Consistent with this tissue distribution, spontaneous or targeted ... ...

Abstract	Foxn1 (forkhead box N1), also known as the nude gene or winged-helix nude (Whn), is a forkhead transcription factor thought to be restricted to keratinocytes in the skin and thymus. Consistent with this tissue distribution, spontaneous or targeted mutation of Foxn1 results in the absence of both hair and a thymus. Genetic manipulation of the Foxn1 locus thus represents a powerful tool for tissue specific gene control in the skin and thymus, and tools such as Cre recombinase under control of the Foxn1 locus are widely used for this purpose. Unexpectedly, we show that Foxn1[Cre] exhibits unexpected activity in male germ cells, resulting in ubiquitous targeting of loxP-flanked alleles in all tissues in offspring from Foxn1[Cre] expressing male mice. Inheritance of recombined loxP alleles occurs independently of Cre inheritance (i.e., offspring lacking Cre nonetheless exhibit recombined alleles), suggesting that Foxn1[Cre] induced recombination in male germ cells must occur prior to meiosis in diploid germ cells. Together with previously published data, our results show that Foxn1, and alleles under its control, are expressed in the pre-meiotic male germline, revealing a new tool for germline targeting of genes, and raising important concerns for gender selection when using Foxn1 regulatory elements.
Keywords	Medicine ; R ; Science ; Q
Language	English
Publishing date	2016-01-01T00:00:00Z
Publisher	Public Library of Science (PLoS)
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Lane Detection in Video-Based Intelligent Transportation Monitoring via Fast Extracting and Clustering of Vehicle Motion Trajectories

Jianqiang Ren / Yangzhou Chen / Le Xin / Jianjun Shi

Mathematical Problems in Engineering, Vol

2014 Volume 2014

Keywords	Mathematics ; QA1-939 ; Science ; Q ; Engineering (General). Civil engineering (General) ; TA1-2040 ; Technology ; T
Language	English
Publishing date	2014-01-01T00:00:00Z
Publisher	Hindawi Publishing Corporation
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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