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Phase-Sensitive Optical Time-Domain Reflectometry Amplified by Gated Raman Pump

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Photonic Sensors 2015年第4期5卷 345-350页

作者： Yi li Yi ZHOU li zhang Mengqiu fan Jin li Key Laboratory of Optical Fiber Sensing & Communications (Ministry of Education) University of Electronic Scienceand Technology of China Chengdu 611731 China

A long-range phase-sensitive optical time-domain reflectometry is proposed and experimentally demonstrated, based on the gated Raman amplification （RA）. This technique can reduce the amplified spontaneous emissions （ASE） noise of the Raman pump while extend the sensing distance. A direct-detection based phase-sensitive optical time-domain reflectometry （O-OTDR） with an operation range of 50 km and a spatial resolution of 20 m has been demonstrated. The influence of different delay time of the gated Raman pump on the O-OTDR system is also discussed.

关键词： Fiber optic sensors Rayleigh scattering stimulated Raman scattering

Study of the interaction of Zn^(2+) with Aβ(10-21) by fluorescamine assay

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Chinese Chemical Letters 2007年第1期18卷 97-98页

作者： Chao Feng zhang li fan Pin Yang Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education Institute of Molecular Science Shanxi University Taiyuan 030006 China

Zinc may play a role as a co-factor in the pathogenesis of Alzheimer＇s disease （AD） through influencing the conformation and neurotoxicity of amyloid β-protein （Aβ）. Using the fluorescamine assay, we show for the first time that Zn^2＋ induced Aβ（10-21） aggregate in a concentration-dependent manner. These results indicate that Aβ（10-21） can be used as an in vitro model in Zn^2＋ - induced Aβ aggregation and that the region 10-21 to be the minimal fragment of zinc-binding domain of full length Aβ（1-42）.

关键词： Aβ(10-21) Fluorescamine Zn^2+ Aggregation

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云南特色花生绿色高效生产技术集成应用

中国油料作物学报 2024年第3期46卷 536-543页

作者：张立帆陆建美张玉松舒兴香陈晓艳刘珏原小燕云南省农业科学院经济作物研究所云南昆明650205 砚山县农业技术推广中心云南砚山663199 东川区经济作物技术推广站云南昆明654100 大理州农业科学研究院云南大理671005 德宏州农业技术推广中心云南德宏678400

据国家统计局数据显示,云南花生单产低,约为全国花生单产(3.92 t/hm^(2))的50%,严重阻碍了云南花生生产和产业发展。为提高云南的花生单产,增加效益,本文集成了“因地制宜机械化生产”、“种子包衣”、“增密播种”、“专用缓(控)释肥... 详细信息

据国家统计局数据显示,云南花生单产低,约为全国花生单产(3.92 t/hm^(2))的50%,严重阻碍了云南花生生产和产业发展。为提高云南的花生单产,增加效益,本文集成了“因地制宜机械化生产”、“种子包衣”、“增密播种”、“专用缓(控)释肥高效施肥”、“主要病虫害绿色高效防控”等关键核心技术,初步建立了云南特色花生绿色高效生产技术体系。该体系的应用成效显著,2022-2023年建成了技术集成核心示范区3377 hm^(2),示范区花生平均单产达到5.37 t/hm^(2),是目前云南平均单产的2.73倍,平均产值达到120791元/hm^(2),同时减少约30%的化肥施用量,减少约55人/hm^(2)的劳动力投入,达到了节本、提质和增效的目的,为云南花生单产提升贡献了重要的科技力量。本文还提出了未来云南特色花生生产的发展方向,以期为花生生产提单产和增效益提供参考。

关键词：云南特色花生绿色高效生产产量提升

Engineering tantalum nitride for efficient photoelectrochemical water splitting

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Science China Chemistry 2024年第7期67卷 2171-2180页

作者： Beibei zhang Zeyu fan Yanbo li Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054China

Photoelectrochemical(PEC)water splitting is a promising energy conversion strategy for directly converting solar energy into green hydrogen *** an efficient PEC device,finding an efficient photoanode material with a suitable band gap and favorable band-edge positions is *** nitride(Ta_(3)N_(5))meets these fundamental requirements,and its theoretical maximum solar-to-hydrogen(STH)conversion efficiency can reach 15.9%.Consequently,it has been widely applied as a photoanode material for the PEC oxygen evolution reaction(OER).However,severe bulk and interface charge recombination,along with sluggish water oxygen kinetics,seriously limits its STH conversion efficiency for PEC water ***,this feature article briefly reviews recent advances by our research group in improving the STH conversion efficiency of the Ta_(3)N_(5)photoanode using various strategies,including defect engineering,construction of a gradient band structure,interface engineering,and surface modification of self-healing OER *** to now,the obtained half-cell STH efficiency has exceeded 4%,providing a solid foundation for the development of tandem PEC devices for unbiased solar-driven overall water splitting toward practical application.

关键词： Photoelectrochemical water splitting tantalum nitride defect engineering interface engineering oxygen evolution cocatalyst

Genome-wide detection for runs of homozygosity analysis in three pig breeds from Chinese Taihu Basin and Landrace pigs by SLAF-seq data

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Journal of Integrative Agriculture 2022年第11期21卷 3293-3301页

作者： TONG Shi-feng ZHU Mo XIE Rui li Dong-feng zhang li-fan liU Yang Department of Animal Genetics Breeding and ReproductionCollege of Animal Science and TechnologyNanjing Agricultural UniversityNanjing 210095P.R.China Key Laboratory of Urban Agriculture Ministry of Agriculture and Rural AffairsShanghai 200240P.R.China

Erhualian(E),Meishan(MS)and Mi(MI)pigs are excellent indigenous pig breeds in Chinese Taihu Basin,which have made great contributions to the genetic improvement of commercial *** of the genetic structure and inbreeding level of the 3 pig breeds is of great significance for the sustainable breeding of commercial *** length and number of runs of homozygosity(ROH)as well as the frequency of genomes covered by ROH can be used as indicators to evaluate the level of inbreeding and the origin of the *** this study,the ROH characteristics of E,MS,MI and Landrace(L)pigs were analyzed by SLAF-seq data,and the inbreeding coefficient based on ROH(F_(ROH))was *** addition,we have identified candidate genes in the genomic regions associated with ROH.A total of10568 ROH were detected in 116 individuals of 4 pig *** analysis showed that there were significant differences in genetic structure between 3 Taihu Basin pig breeds and L,and the genetic structure of E and MI was *** results of F_(ROH)showed that the inbreeding level of MS was the highest(0.25±0.07),while E and MI were lower than *** with the other 3 pig populations,MS showed a higher frequency of long ROH(>5 Mb),indicating higher inbreeding in MS in recent generations.A large number of candidate genes related to reproductive traits are located in the genomic regions with a high frequency of ROH,and these genes are expected to be used as candidate genes in marker-assisted selection(MAS)breeding *** findings can provide theoretical support for genetic conservation and genetic improvement of 3 pig breeds in Chinese Taihu Basin.

关键词： runs of homozygosity inbreeding coefficient pig candidate gene

On Generalized E-Monotonicity in Banach Spaces

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Journal of Mathematical Research and Exposition 2010年第5期30卷 903-908页

作者： fan Long zhang li Ya fan School of Mathematics Science Liaocheng University Shandong 252059 P. R. China

Several new kinds of generalized E-preinvexity and generalized invariant E-monotonicity are introduced in the setting of Banach spaces. The relations between E-preinvexity, E-prequasiinvexity, （pseudo, quasi） E-invexity and invariant （pseudo, quasi） E-monotonicity are studied, which can be viewed as an extension of some known results.

关键词： Eopreinvexity E-invexity invariant E-monotonicity relations.

Effects of Aromatic Stabilization Energies on Photochromism of New Asymmetrical Azaindole-Containing Diarylethenes

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Chinese Journal of Chemistry 2015年第7期33卷 785-791页

作者： Zhiyuan Sun Congcong zhang Hui li Congbin fan Gang liu Shouzhi Pu Jiangxi Key Laboratory of Organic Chemistry Jiangxi Science and Technology Normal University Nanchang Jiangxi 330013 China

Three new asymmetrical diarylethenes containing an azaindole moiety and a variable heteroaryl ring have been synthesized. Their properties, such as photochromism, fatigue resistance, thermal stability, acidichromism, and fluorescence, were systematically investigated to elucidate the effects of aromatic stabilization energies （ASE） of the heteroaryl moieties. The results indicated that thermal stability decreased with the increment of the aromatic stabilization energies of the variable heteroaryl rings in the order of thiazyl〈thienyl〈pyrrolyl. Moreover, the dual switching behaviors of these azaindole-containing diarylethenes were also studied by the stimulation of acid/base and light. Addition of trifluoroacetie acid to the solutions of these diarylethenes resulted in obvious hypochromie shifts, and their N-protonated forms also exhibited favorable photochromism.

关键词： photochromism diarylethene azaindole aromatic stabilization energy acidichromism fluorescence

Investigation of electrostatically tunable adhesion and instability of flying head slider

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Friction 2024年第3期12卷 462-473页

作者： fan zhang Yu WANG Yueqiang HU Mingquan zhang Baotong li School of Mechanical Engineering Xi’an Jiaotong UniversityXi’an 710049China National Engineering Research Center for High Efficiency Grinding College of Mechanical and Vehicle EngineeringHunan UniversityChangsha 410082China

The interfacial adhesion between microstructures is inevitable in a micro-electro-mechanical system(e.g.,hard disk drive(HDD)),which may lead to complicated microtribodynamics *** research has investigated the effect of surface potential on the interfacial adhesion and microtribodynamics of the head–disk interface(HDI)in an HDD.A dynamic continuum surface force model,where the electrowetting is considered,is proposed to evaluate the interfacial interaction,and then employed into a two-degree-of-freedom(2DOF)model to theoretically analyze the potential influence mechanism on the *** results confirm that the elimination of potential can effectively repress the adhesion retention,which is further proved by the measured slider response with a laser Doppler vibrometer(LDV).Moreover,the effect of the potential on the adhesion-induced instability is also analyzed through the phase *** tells that the critical stable flying height can be lowered with the elimination of potential.

关键词： electric field(EF) retention instability adhesion

Green Synthesis of Iron(Ⅱ,Ⅲ)-polyphenol Nanoparticles and Their Adsorption of Malachite Green

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Journal of Wuhan University of Technology(Materials Science) 2024年第4期39卷 1025-1030页

作者：胡玉 ZHOU fan zhang Nan PAN Xiaobin li Shiying zhang Dong li li 张玲帆 Department of Chemistry and Environmental Engineering Hanjiang Normal UniversityShiyan 442000China Shiyan Hydrological and Water Resources Survey Bureau of Hubei Province Shiyan 442000China School of Chemistry and Molecular Engineering East China University of Science and TechnologyShanghai 200237China

Three kinds of iron nanoparticles(FeNPs)were prepared via green route based on pomegranate(PG),green tea(GT),and mulberry(ML)extracts under ambient *** obtained materials were characterized by scanning electron microscopy(SEM),transmission electronic microscopy(TEM),X-ray energy-dispersive spectrometer(EDS),X-ray diffraction(XRD),fourier transform infrared spectroscopy(FTIR),and X-ray photoelectron spectroscopy(XPS)*** experimental results show that FeNPs were in the form of amorphous iron(Ⅱ,Ⅲ)-polyphenol complex with different dispersity and ***-Fe has the smallest size range of 25-35 nm,PG-Fe has a moderate size-distribution of 30-40 nm,while ML-Fe formed a tuberous net-type with a sheeting ***-Fe displays the highest removal efficiency of 90.2%in 20 min towards cationic dye of malachite green(16.6%by ML-Fe and 69.3%by GT-Fe),which is attributed to its highest polyphenol content,lowest zeta potential,as well as the most Fe^(2+)on the surface of *** removal mechanism was mainly induced by electrostatic adsorption based on pH and zeta potential tests.

关键词： iron nanoparticles pomegranate green tea mulberry adsorption