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Texture Feature Extraction Method for Ground Nephogram Based on Contourlet and the Power Spectrum Analysis Algorithm

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Computers, Materials & Continua 2019年第8期61卷 861-875页

作者： Xiaoying Chen shijun Zhao Xiaolei wang Xuejin Sun Jing Feng Nan Ye College of Mechanical&Electrical Engineering Sanjiang UniversityNanjingChina Institute of Meteorology and Oceanography National University of Defense TechnologyNanjingChina department of Civil Engineering Monash UniersityMelbourneAustralia

It is important to extract texture feature from the ground-base cloud image for cloud type automatic *** this paper,a new method is presented to capture the contour edge,texture and geometric structure of cloud images by using Contourlet and the power spectrum analysis *** abundant texture information is *** images can be obtained a multiscale and multidirection *** coefficient matrix from Contourlet transform of ground nephogram is *** energy,mean and variance characteristics calculated from coefficient matrix are composed of the feature *** frequency information of the data series from the feature vector values is obtained by the power spectrum *** Support Vector Machines(SVM)classifier is used to classify according to the frequency information of the trend graph of data *** is shown that altocumulus and stratus with different texture frequencies can be effectively recognized and further subdivided the types of clouds.

关键词： Ground nephogram super-wavelet Contourlet the power spectrum

Particle Size-Controlled Oxygen Reduction and Evolution Reaction Nanocatalysts Regulate Ru(bpy)_(3)^(2.)’s Dual-potential Electrochemiluminescence for Sandwich Immunoassay

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Research 2023年第4期2023卷 701-715页

作者： shijun wang Shu Zhu Ziqi Kang Xiangxiu wang Zixin Deng Kun Hu Jianjun Hu Xiancheng Liu Guixue wang Guangchao Zang Yuchan Zhang Institute of Life Science and Laboratory of Tissue and Cell Biology Lab Teaching&Management CenterChongqing Medical UniversityChongqing 400016China Key Laboratory for Biorheological Science and Technology of Ministry of Education State and Local Joint Engineering Laboratory for Vascular ImplantsBioengineering College of Chongqing UniversityChongqing 400030China Jinfeng Laboratory Chongqing 401329China department of Pathophysiology Chongqing Medical UniversityChongqing 400016China department of Pathology Guizhou Provincial People’s HospitalGuiyangGuizhou 550002China

Multiple signal strategies remarkably improve the accuracy and efficiency of electrochemiluminescence(ECL)immunoassays,but the lack of potential-resolved luminophore pairs and chemical cross talk hinders their *** this study,we synthesized a series of gold nanoparticles(AuNPs)/reduced graphene oxide(Au/rGO)composites as adjustable oxygen reduction reaction and oxygen evolution reaction catalysts to promote and modulate tris(2.2.-bipyridine)ruthenium(II)(Ru(bpy)_(3)^(2.))’s multisignal *** the increase in the diameter of AuNPs(3 to 30 nm),their ability to promote Ru(bpy)_(3)^(2.)’s anodic ECL was first impaired and then strengthened,and cathodic ECL was first enhanced and then ***/rGOs with medium-small and medium-large AuNP diameters remarkably increased Ru(bpy)_(3)^(2.)’s cathodic and anodic luminescence,***,the stimulation effects of Au/rGOs were superior to those of most existing Ru(bpy)_(3)^(2.)***,we proposed a novel ratiometric immunosensor construction strategy using Ru(bpy)_(3)^(2.)’s luminescence promoter rather than luminophores as tags of antibodies to achieve signal *** method avoids signal cross talk between luminophores and their respective co-reactants,which achieved a good linear range of 10−7 to 10−1 ng/ml and a limit of detection of 0.33 fg/ml for detecting carcinoembryonic *** study addresses the previous scarcity of the macromolecular co-reactants of Ru(bpy)_(3)^(2.),broadening its application in biomaterial ***,the systematic clarification of the detailed mechanisms for converting the potential-resolved luminescence of Ru(bpy)_(3)^(2.)could facilitate an in-depth understanding of the ECL process and should inspire new designs of Ru(bpy)_(3)^(2.)luminescence enhancers or applications of Au/rGOs to other *** work removes some impediments to the development of multisignal ECL biodetection systems and provides vitality into their

关键词： luminescence potential reactant

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泻火解毒法治疗原矛头蝮蛇咬伤的临床观察

蛇志 2024年第3期36卷 277-280,284页

作者：陈福伟王世军张美吉赵玉楣杨尾莲沈芳华福建中医药大学附属人民医院蛇伤科福建福州350004

目的观察泻火解毒法治疗原矛头蝮蛇咬伤的临床疗效。方法选择2.2.年7月1日至2.2.年8月1日在我院治疗的原矛头蝮蛇咬伤患者108例,按随机数字表法分为治疗组和对照组各54例。对照组给予常规治疗,治疗组在对照组的基础上给予口服蛇伤胶囊(... 详细信息

目的观察泻火解毒法治疗原矛头蝮蛇咬伤的临床疗效。方法选择2.2.年7月1日至2.2.年8月1日在我院治疗的原矛头蝮蛇咬伤患者108例,按随机数字表法分为治疗组和对照组各54例。对照组给予常规治疗,治疗组在对照组的基础上给予口服蛇伤胶囊(泻火解毒法治疗毒蛇咬伤代表方)治疗,观察两组患者治疗后第1、3、5、7天时的患肢周径差、肿胀消退时间、治疗疗程及患肢疼痛评分。结果两组患者治疗后第1、3天时的患肢周径差比较,差异均无统计学意义(均P>0.05);治疗后第5、7天时,治疗组的患肢周径差明显低于对照组,差异均有统计学意义(均P<0.05)。治疗组的患肢肿胀消退时间、治疗疗程均短于对照组,差异有统计学意义(均P<0.05)。治疗第3、5、7天时,治疗组的患肢疼痛评分均明显低于对照组,差异均有统计学意义(均P<0.05)。结论泻火解毒法治疗原矛头蝮蛇咬伤的临床疗效好,值得推广应用。

关键词：蛇伤胶囊原矛头蝮蛇咬伤泻火解毒法肢体肿胀临床疗效疼痛评分

单次灌注化疗后膀胱持续生理盐水冲洗或增加中低风险非肌层浸润性膀胱癌进展风险

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现代泌尿外科杂志 2024年第6期29卷 481-485页

作者：王飞杜依青秦彩朋李清刘士军徐涛北京大学人民医院泌尿外科北京100044

目的探究行经尿道膀胱肿瘤切除术(TURBT)的中低风险非肌层浸润性膀胱癌(NMIBC)患者单次即刻膀胱灌注化疗(SIIC)后膀胱持续生理盐水冲洗(CSBI)的治疗效果。方法回顾性分析2.04年1月—2.19年12.于北京大学人民医院泌尿外科行TURBT的2.1... 详细信息

目的探究行经尿道膀胱肿瘤切除术(TURBT)的中低风险非肌层浸润性膀胱癌(NMIBC)患者单次即刻膀胱灌注化疗(SIIC)后膀胱持续生理盐水冲洗(CSBI)的治疗效果。方法回顾性分析2.04年1月—2.19年12.于北京大学人民医院泌尿外科行TURBT的2.1例中低风险NMIBC患者的临床资料,根据患者SIIC后是否进行CSBI分为CSBI组和无CSBI组,比较两组患者的复发率、进展率、无复发生存率和无进展生存率。通过Cox单因素及多因素回归分析探究CSBI是否为患者肿瘤复发和进展的危险因素。结果两组患者的基线资料、复发率和进展率比较,差异均无统计学意义(P>0.05)。两组患者无复发生存率比较无明显差异,而CSBI组无进展生存率更低(χ^(2.=8.2.0,P=0.004)。在多因素Cox回归分析中,糖尿病(HR:2.2.0,95%CI:1.066~4.704,P=0.033)和多发肿瘤(HR:3.060,95%CI:1.639~5.711,P2.P=0.008)是肿瘤进展的独立危险因素。结论SIIC后CSBI可能会增加中低风险NMIBC患者的进展风险,但该结论仍需要更大样本量进行验证。

关键词：膀胱癌单次即刻膀胱灌注化疗膀胱持续生理盐水冲洗膀胱内复发肿瘤进展

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二元体系加压汽液平衡的研究

燃料化学学报 1990年第2期18卷 185-192页

作者：王琦陈庚华韩世钧浙江大学化学系

用双循环式加压汽液平衡装置分别测定了苯和乙醇在300—445K范围内的饱和蒸气压,并用线性优化法求取了在实测温度范围内的Antoine常数。用同一装置测定了苯-乙醇、正庚烷-乙醇在101.3、302.5、506.8、709.3和810.6 kPa下的汽液相平衡数... 详细信息

用双循环式加压汽液平衡装置分别测定了苯和乙醇在300—445K范围内的饱和蒸气压,并用线性优化法求取了在实测温度范围内的Antoine常数。用同一装置测定了苯-乙醇、正庚烷-乙醇在101.3、302.5、506.8、709.3和810.6 kPa下的汽液相平衡数据。对实测数据及苯-正庚烷体系在相应压力下的汽液平衡数据进行了热力学关联,其中汽相用二阶维里方程,液相用Wilson、NRTL、UNIQUAC方程关联,同时还用共沸单点法对苯-乙醇、正庚烷-乙醇体系的实测数据进行了关联。两种关联方法的计算结果与实测值作了比较,均获得了较为满意的结果。

关键词：苯正庚烷乙醇二元体系汽液平衡

Characterization on the Microstructures of Brominated Natural Rubber from Latex

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Journal of Wuhan University of Technology(Materials Science) 2019年第1期34卷 201-206页

作者： XUE xinghua LIU Yafei HAN Xiuping LI Guang wang Zhiyong College of Materials and Chemical Engineering Hainan University department of Chemistry and Physics Troy University

To elucidate the mechanism of brominated natural rubber(BNR), eight BNR samples with different bromine content were prepared from latex in different bromination time, and the microstructures were characterized by Fourier transform infrared spectroscopy(FTIR) and ~1H-NMR spectroscopy, respectively. The hardness of BNR increased and its nature transformed from elastomer to resin with the increase of bromine content. Unlike chlorinated natural rubber(CNR), FTIR showed that there were no carbonyl groups on the molecular chains of BNR. ~1H-NMR spectroscopy revealed that the reaction activity of bromine and the secondary hydrogen atom of BNR were much higher than those of the primary one. The brominated substitution took place in the hydrogen atom of CH_3 and CH_2.groups firstly, then in the late period of bromination the bond of C=C was transferred to the saturated bond of C-C due to the Markovnikov addition of hydrogen bromide. Based on these findings, the mechanism of BNR from latex could be deduced as a free radical reaction and the detailed bromination process was presented.

关键词： natural rubber bromination microstructure mechanism radical reaction

Modelling of the electronic and ferroelectric properties of trichloroacetamide using Monte Carlo and first-principles calculations

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Journal of Materiomics 2017年第2期3卷 130-134页

作者： Yaxuan Cai shijun Luo Zhao wang Juan Xiong Haoshuang Gu Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials Hubei Key Laboratory of Ferro&Piezoelectric Materials and DevicesFaculty of Physics&Electronic SciencesHubei UniversityWuhan 430062PR China School of Sciences Hubei Automotive Industries InstituteShiyan 442002PR China

The electronic structure and ferroelectric mechanism of trichloroacetamide were studied using first principles calculations and density functional theory within the generalized gradient *** both Bader charge and electron deformation density,large molecular spontaneous polarization is found to originate from the charge transfer cause by the strong“push-pull”effect of electron-releasing interacting with electron-withdrawing *** intermolecular hydrogen bonds,Ne-H…O,produce dipole moments in adjacent molecules to be aligned with each *** also reduce the potential energy of the molecular chain threaded by hydrogen *** to the symmetric crystalline properties,however,the polarization of trichloroacetamide is mostly compensated and therefore *** the Berry Phase method,the spontaneous polarization of trichloroacetamide was simulated,and good agreement with the experimental values was *** the polarization characteristics of trichloroacetamide,we constructed a one-dimensional ferroelectric Hamiltonian model to calculate the ferroelectric properties of *** the Hamiltonian model,the thermal properties and ferroelectricity of trichloroacetamide were studied using the Monte Carlo method,and the Tc value was calculated.

关键词： First-principles study Monte Carlo Trichloroacetamide TCAA Organic ferroelectrics

Genomic Variations in the Tea Leafhopper Reveal the Basis of Its Adaptive Evolution

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Genomics, Proteomics & Bioinformatics 2022年第6期20卷 1092-1105页

作者： Qian Zhao Longqing Shi Weiyi He Jinyu Li shijun You Shuai Chen Jing Lin Yibin wang Liwen Zhang Guang {2. Liette Vasseur Minsheng You State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops Institute of Applied EcologyFujian Agriculture and Forestry UniversityFuzhou 350002China Institute of Rice Fujian Academy of Agricultural SciencesFuzhou 350018China Tea Research Institute Fujian Academy of Agricultural SciencesFuzhou 350001China Center for Genomics and Biotechnology Fujian Agriculture and Forestry UniversityFuzhou 350002China department of Biological Sciences Brock UniversitySt.CatharinesON L2S 3A1Canada

Tea green leafhopper(TGL),Empoasca onukii,is of biological and economic *** numerous studies,the mechanisms underlying its adaptation and evolution remain ***,we use previously untapped genome and population genetics approaches to examine how the pest adapted to different environmental variables and thus has expanded *** complete a chromosome-level assembly and annotation of the *** genome,showing notable expansions of gene families associated with adaptation to chemoreception and *** signals indicating balancing selection highlight metabolic pathways involved in adaptation to a wide range of tea varieties grown across ecologically diverse *** of genetic variations among 54 *** samples unveil the population structure and evolutionary history across different tea-growing regions in *** results demonstrate that the genomic changes in key pathways,including those linked to metabolism,circadian rhythms,and immune system functions,may underlie the successful spread and adaptation of *** work highlights the genetic and molecular basis underlying the evolutionary success of a species with broad economic impacts,and provides insights into insect adaptation to host plants,which will ultimately facilitate more sustainable pest management.

关键词： Tea green leafhopper Genomic variation Population genetics Local adaptation Evolutionary history

Understanding the geometric and electronic factors of PtNi bimetallic surfaces for efficient and selective catalytic hydrogenation of biomass-derived oxygenates

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Journal of Energy Chemistry 2021年第9期30卷 16-24页

作者： Jingcheng Wu Chuangwei Liu Yuting Zhu Xiangbo Song Chengyan Wen xinghua Zhang Chenguang wang Longlong Ma Guangzhou Institute of Energy Conversion Chinese Academy of SciencesGuangzhou 510640China department of Energy Conversion and Storage Technical University of Denmark2800 LyngbyDenmark Key Laboratory of Renewable Energy Chinese Academy of SciencesGuangzhou 510640China Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development Chinese Academy of SciencesGuangzhou 510640China University of Chinese Academy of Sciences 100049 BeijingChina

Ni-base catalysts are promising candidate for the hydrogenation of furfural(FAL) to high-value ***,slow intermediate desorption and low selectivity limit its *** the catalytic performance of each active sites is vital to design hydrogenation catalyst,and tuning the geometrical sites at molecule level in PtNi could lead to the modification of electronic structure,and thus the selectity for the hydrogenation of FAL was ***,PtNi hollow nanoframes(PtNi HNFs) with three dimensional(3 D) molecular accessibility were synthesized,EDX results suggested that Ni was evenly distributed inside of the hollow nanoframes,whereas Pt was relatively concentrated at the *** calculation demonstrated that PtNi significant decrease the desorption energy of the *** strategy could not only enhance the desorption of intermediates to improve the catalytic performance,but also transfer the adsorption mode of FAL on catalyst surface to selective hydrogenation of FAL to FOL or *** PtNi HNFs catalyst afforded excellent catalytic performance for selective hydrogenation of a broad range of biomass-derived platform chemicals under mild conditions,especially of FAL to furfuryl alcohol(FOL),in quantitative FOL yields(99%) with a high TOF of 2.56 h^(-1).It is found that the superior performance of PtNi HNFs is attributed to its 3 D hierarchical structure and synergistic electronic effects between Pt and ***,the kinetic study demonstrated that the activation energy for hydrogenation of FAL was as low as 54.95 kJ mol^(-1).

关键词： PtNi HNFs Biomass Hydrogenation Biofuels Heterogeneous catalysts