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| 1 | Welding Deviation Detection Algorithm Based on Extremum of Molten Pool Image Contour显示文摘The welding deviation detection is the basis of robotic tracking welding, but the on-line real-time measurement of welding deviation is still not well solved by the existing methods. There is plenty of information in the gas metal arc welding(GMAW) molten pool images that is very important for the control of welding seam tracking. The physical meaning for the curvature extremum of molten pool contour is revealed by researching the molten pool images, that is, the deviation information points of welding wire center and the molten tip center are the maxima and the local maxima of the contour curvature, and the horizontal welding deviation is the position difference of these two extremum points. A new method of weld deviation detection is presented, including the process of preprocessing molten pool images, extracting and segmenting the contours, obtaining the contour extremum points, and calculating the welding deviation, etc. Extracting the contours is the premise, segmenting the contour lines is the foundation, and obtaining the contour extremum points is the key. The contour images can be extracted with the method of discrete dyadic wavelet transform, which is divided into two sub contours including welding wire and molten tip separately. The curvature value of each point of the two sub contour lines is calculated based on the approximate curvature formula of multi-points for plane curve, and the two points of the curvature extremum are the characteristics needed for the welding deviation calculation. The results of the tests and analyses show that the maximum error of the obtained on-line welding deviation is 2 pixels(0.16 mm), and the algorithm is stable enough to meet the requirements of the pipeline in real-time control at a speed of less than 500 mm/min. The method can be applied to the on-line automatic welding deviation detection. | ZOU Yong JIANG Lipei LI Yunhua XUE Long HUANG Junfen HUANG Jiqiang | 2016 | Chinese Journal of Mechanical Engineering2016，29，1： | 12 |
| 2 | Welding Polarity Effects on Weld Spatters and Bead Geometry of Hyperbaric Dry GMAW显示文摘Welding polarity has influence on welding stability to some extent, but the specific relationship between welding polarity and weld quality has not been found, especially under the hyperbaric environment. Based on a hyperbaric dry welding experiment system, gas metal arc welding(GMAW) experiments with direct current electrode positive(DCEP) and direct current electrode negative(DCEN) operations are carried out under the ambient pressures of 0.1 MPa, 0.4 MPa, 0.7 MPa and 1.0 MPa to find the influence rule of different welding polarities on welding spatters and weld bead geometry. The effects of welding polarities on the weld bead geometry such as the reinforcement, the weld width and the penetration are discussed. The experimental results show that the welding spatters gradually grow in quantity and size for GMAW with DCEP, while GMAW with DCEN can produce fewer spatters comparatively with the increase of the ambient pressure. Compared with DCEP, the welding current and arc voltage waveforms for DCEN is more stable and the distribution of welding current probability density for DCEN is more concentrated under the hyperbaric environment. When the ambient pressure is increased from 0.1 MPa to 1.0 MPa, the effects of welding polarities on the reinforcement, the weld width and the penetration are as follows: an increase of 0.8 mm for the weld reinforcement is produced by GMAW with DCEN and 1.3 mm by GMAW with DCEP, a decrease of 7.2 mm for the weld width is produced by DCEN and 6.1 mm by DCEP; and an increase of 3.9 mm for the penetration is produced by DCEN and 1.9 mm by DCEP. The proposed research indicates that the desirable stability in the welding procedure can be achieved by GMAW with DCEN operation under the hyperbaric environment. | XUE Long WU Jinming HUANG Junfen HUANG Jiqiang ZOU Yong LIU Jian | 2016 | Chinese Journal of Mechanical Engineering2016，29，2： | 9 |
| 3 | Constant Speed Control for Complex Cross-section Welding Using Robot Based on Angle Self-Test显示文摘Expandable profile liner(EPL) is a promising new oil well casing cementing technique, and welding is a major EPLs connection technology. Connection of EPL is still in the stage of manual welding so far, automatic welding technology is a hotspot of EPL which is one of the key technologies to be solved. A robot for automatic welding of '8' type EPL is studied. Four quadrants of mathematical equations of the 8-shaped cross-section track of EPL, consisting of multiple arcs, are established. Mechanism program for complex cross-section welding of EPL based on angle detection is proposed according to characteristics of small size, small valleys, and large forming errors, etc. A welding velocity vector control model is established by linkage control of a welding vehicle, a small driven actuator, and a height tracking mechanism. A constant speed control model based on an angle and symmetrical analysis model of rectangular coordinate system for EPL is built. Constraint conditions of constant speed control between each section are analyzed with 4 sections in first quadrant as an example, and cooperation work mechanism of the welding vehicle and the small tracking actuator is established based on pressure detection. The constant speed control model using angle self-test can be used to avoid the need for a precise mathematical model for tracking control and to adapt manufacture and installation deviation of EPL workpiece. The model is able to solve constant speed and trajectory tracking problems of EPL cross-section welding. EPL seams welded by the studied robot are good in appearance, and non-destructive testing(NDT) shows the seams are good in quality with no welding defects. Bulge tests show that the maximum pressure of welded EPL is 35 MPa, which can fulfill expansion performance requirements. | XUE Long ZOU Yong HUANG Jiqiang HUANG Junfen TAO Xinghua HU Yanfeng | 2014 | Chinese Journal of Mechanical Engineering2014，27，2： | 8 |
| 4 | Postnatal feeding with high-fat diet induces obesity and precocious puberty in C57BL/6J mouse pups: a novel model of obesity and puberty显示文摘童年肥胖和肥胖相关的新陈代谢的复杂并发症被一本高脂肪的出生后的食谱导致。然而,一个合适的动物模型的缺乏在肥胖研究仍然是可观的挑战。在当前的学习,我们在断奶以后在哺乳期间并且到小狗提供了高脂肪的饮食(HFD ) 给水坝。我们也与导致 HFD 的出生后的肥胖开发了 C57BL/6J 老鼠小狗的一个新奇模型。结果证明用 HFD 喂在小狗导致胖免职和肥胖。而且, HFD 更 potently 比女小狗增加了男性的身体重量(BW ) 。喂 HFD 的女小狗是肥胖的,经历了早熟的发身,并且显示出在视下丘的增加的 kisspeptin 表示。然而,父母肥胖和早熟的发身没在导致 HFD 的出生后的重量获得和小狗的发身发作上施加 synergistic 效果。有趣地,有正常 BW 的一些喂 HFD 的崽也展出了早熟的发身。这发现建议了那篇食谱作文然而并非 BW 扳机发身发作。我们的模型建议肥胖和早熟的发身的好构造有效性。而且,我们的模型能也被用来探索在 dietinduced 之间的相互的相互作用出生后的童年肥胖和发身。 | Rahim Ullah Yan Su Yi Shen Chunlu Li Xiaoqin Xu Jianwei Zhang Ke Huang Naveed Rauf Yang He Jingjing Cheng Huaping Qin Yu-Dong Zhou Junfen Fu | 2017 | Frontiers of Medicine2017，11，2： | 5 |
| 5 | Analysis of Powdery Mildew Resistance in Wild Melon MLO Mutants显示文摘Wild species have a potential value in crop breeding. Explore MLO gene which related with powdery mildew natural resistance is very important for improving the quality of melon. Resistance to powdery mildew was examined in cultivar and wild species by leaf inoculation. The wild germplasms showed resistance to powdery mildew Race1. Cloning and sequence analysis of the Cm MLO2 gene identified an 85 bp difference between the wild and cultivated species. The Cm MLO2 gene was expressed in the wild germplasm after fluorescence-labeled Agrobacterium-mediated transformation. A positive transgenic plant showed successful invasion by powdery mildew Race1. These results suggested that the wild species might have failed to encode the MLO protein, thereby resulting in the MLO-negative regulation of powdery mildew, which in turn resulted in the broad-spectrum resistance of the wild species to powdery mildew. | CHENG Hong KONG Weiping Lü Junfen LI Jiping | 2015 | Horticultural Plant Journal2015，1，3： | 5 |
| 6 | Adsorption behavior of benzenesulfonic acid by novel weakly basic anion exchange resins显示文摘Two novel weakly basic anion exchange resins(SZ-1 and SZ-2) were prepared via the reaction of macroporous chloromethylated polystyrene-divinylbenzene(Cl-PS-DVB) beads with dicyclohexylamine and piperidine, respectively. The physicochemical structures of the resulting resins were characterized using Fourier Transform Infrared Spectroscopy and pore size distribution analysis. The adsorption behavior of SZ-1 and SZ-2 for benzenesulfonic acid(BA) was evaluated, and the common commercial weakly basic anion exchanger D301 was also employed for comparison purpose. Adsorption isotherms and influence of solution p H, temperature and coexisting competitive inorganic salts(Na2SO4and Na Cl) on adsorption behavior were investigated and the optimum desorption agent was obtained.Adsorption isotherms of BA were found to be well represented by the Langmuir model.Thermodynamic parameters involving ΔH, ΔG and ΔS were also calculated and the results indicate that adsorption is an exothermic and spontaneous process. Enhanced selectivity of BA sorption over sulfate on the two novel resins was observed by comparison with the commercial anion exchanger D301. The fact that the tested resins loaded with BA can be efficiently regenerated by Na Cl solution indicates the reversible sorption process. From a mechanistic viewpoint, this observation clearly suggests that electrostatic interaction is the predominant adsorption mechanism. Furthermore, results of column tests show that SZ-1possesses a better adsorption property than D301, which reinforces the feasibility of SZ-1for potential industrial application. | Yue Sun Peng Zuo Junfen Luo Rajendra Prasad Singh | 2017 | Journal of Environmental Sciences2017，29，4： | 3 |
| 7 | Synthesis, Antitumor Activity and Preliminary Structure-activity Relationship of 2-Aminothiazole Derivatives显示文摘In this paper, we described the synthesis of 2-aminoflfiazole sublibrary containing methyl, bromo, phenylor butylidene at 4- or/and 5-position of its core. All target compounds were evaluated tbr their antitumor activitiesagainst human lung cancer cell line H1299 and human glioma cell line SHG-44. Among the compotmds screened,4,5,6,7-tetrahydrobenzo[d]thiazole(26b) exhibited the most potent antittunor activities with IC50 values of 4.89 and4.03 μmol/L against the two tested cell lines, respectively. Preliminary structure-activity relationship(SAR) studies ofthese compound were subsequently investigated. | LI Hongshuang WANG Xinran DUAN Guiyun XIA Chengcai XIAO Yuliang LI Furong GE Yanqing YOU Guirong HAN Junfen FU Xiaopan | 2016 | Chemical Research in Chinese Universities2016，32，6： | 3 |
| 8 | The SWI/SNF chromatin-remodeling factors BAF60a, b, and c in nutrient signaling and metabolic control显示文摘新陈代谢的症候群成为了不利地影响人的健康的全球流行病。基因、环境的因素贡献新陈代谢的混乱的致病;然而,集成这些暗示到的机制调整新陈代谢的生理学和不完全地定义的新陈代谢的混乱遗体的发展。新兴的证据建议 SWI/SNF 改变染色质的建筑群为指导新陈代谢的 reprogramming 和改编响应是批评的营养并且另外的生理的信号。ATP 依赖的 SWI/SNF 改变染色质的建筑群包括多达 11 个子单元, BAF60 子单元在之中用作在核心建筑群和特定的 transcriptional 因素之间的一个关键连接。BAF60 子单元有三个成员, BAF60a, b,和 c。不同织物分发模式和 BAF60 蛋白质的规章的机制在不同新陈代谢的房间类型与专业化功能授与每 isoform。在这评论,我们在滋养的察觉到和精力新陈代谢在下面的规定总结 BAF60 蛋白质的新兴的角色和机制生理并且疾病条件。 | Ruo-Ran Wang Ran Pan Wenjing Zhang Junfen Fu Jiandie D. Lin Zhuo-Xian Meng | 2018 | Protein & Cell2018，9，2： | 2 |
| 9 | COVID-19 vaccine development:milestones,lessons and prospects显示文摘With the constantly mutating of SARS-CoV-2 and the emergence of Variants of Concern(VOC),the implementation of vaccination is critically important.Existing SARS-CoV-2 vaccines mainly include inactivated,live attenuated,viral vector,protein subunit,RNA,DNA,and virus-like particle(VLP)vaccines.Viral vector vaccines,protein subunit vaccines,and mRNA vaccines may induce additional cellular or humoral immune regulations,including Th cell responses and germinal center responses,and form relevant memory cells,greatly improving their efficiency.However,some viral vector or mRNA vaccines may be associated with complications like thrombocytopenia and myocarditis,raising concerns about the safety of these COVID-19 vaccines.Here,we systemically assess the safety and efficacy of COVID-19 vaccines,including the possible complications and different effects on pregnant women,the elderly,people with immune diseases and acquired immunodeficiency syndrome(AIDS),transplant recipients,and cancer patients.Based on the current analysis,governments and relevant agencies are recommended to continue to advance the vaccine immunization process.Simultaneously,special attention should be paid to the health status of the vaccines,timely treatment of complications,vaccine development,and ensuring the lives and health of patients.In addition,available measures such as mix-and-match vaccination,developing new vaccines like nanoparticle vaccines,and optimizing immune adjuvant to improve vaccine safety and efficacy could be considered. | Maochen Li Han Wang Lili Tian Zehan Pang Qingkun Yang Tianqi Huang Junfen Fan Lihua Song Yigang Tong Huahao Fan | 2022 | Signal Transduction and Targeted Therapy2022，7，6： | 2 |
| 10 | The effects of carbonization time on the properties and structure of PAN-based activated carbon hollow fiber显示文摘 | JUNFEN SUN GUANGXIANG WU QINGRUI WANG | 2005 | Journal of Materials Science2005，40，3： | 1 |
| 11 | An investigation of the thermal degradation of the intumescent coating containing MoO3and Fe203 显示文摘 | LI Guoxin YANG Junfen HE Tingshu | 2008 | Surf Coat Technol2008，202，： | 1 |
| 12 | Association be- tween FSHR polymorphisms and polycystic ovary syndrome among Chinese women in north China 显示文摘 | XueQing Wu SuMing Xu JunFen Liu | 2014 | J Assist Reprod Genet2014，31，： | 1 |
| 13 | An investigation of the thermal degradation of the intumescent coating containing MoO3 and Fe2O3显示文摘 | LI GUOXIN YANG JUNFEN HE TINGSHU | 2008 | Surface & Coatings Technology2008，202，： | 1 |
| 14 | P2-Ligand complexes as building blocks for the formation of one-dimensional polymers显示文摘 | Bai Junfen Leiner E Scheer M | 2002 | Angew Chem Int Ed2002，41，5： | 1 |
| 15 | An Investigation of the Thermal Degradation of the Intumescent Coating Containing MoO3 and Fe2O3显示文摘 | Lin Guoxin Yang Junfen He Tingshu | 2008 | Surface & Coatings Technology2008，202，： | 1 |
| 16 | An efficient synthesis of 3, 4-dihydropyrimidin-2- ones catalyzed by NH2SO3 H under ultrasound irradiation 显示文摘 | LI Jitai HAN Junfen YANG Jinhui | 2003 | Ultrasonics Sonochemistry2003，10，3： | 1 |
| 17 | Metabolic syndrome inobese children bom large for gestational age显示文摘 | Wang X Liang L Junfen FU | 2007 | Indian J Pediatr2007，74，6： | 1 |
| 18 | Expression, Purification, and Characterization of a Novel Soluble Form of Human Delta-like-1显示文摘 | Mei Zhao Mingyuan Wu Lingchen Guo Junfen Jiang Weiwei Huang Xiaojuan Lin Zhonghui Zhang Di Xiang Huili Lu Shunying Zhu Yan Yu Anja Moldenhauer Wei Han | 2010 | Applied Biochemistry and Biotechnology2010，，5： | 1 |
| 19 | Controllable functionalization of single-wall carbon nanotubes by in situ polymerization method for organic photovoltaic devices显示文摘 | Daqin Yun Wei Feng Hongcai Wu Baoming Li Xiaozheng Liu Wenhui Yi Junfen Qiang Song Gao Shaolin Yan | 2008 | Synthetic Metals2008，，21： | 1 |
| 20 | Methane sensor based on nanocomposite of palladium/multi-walled carbon nanotubes grafted with 1,6-hexanediamine显示文摘 | Li Zhongping Li Junfen Wu Xu | 2009 | Sensors and Actuators B2009，139，： | 1 |
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