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国外计量 1976年第5期 47-49页

作者： s.n.Bagaev 沈乃澂

最近,借用非线性吸收的气体激光的频率稳定性已经取得显著进展。在文献(1,2)中,发表了3.39微米甲烷非线性吸收的两台单独稳定的氦-氖激光器之间差频的平均值是3赫。取得的高复现性超过以前得到的可见0.63微米和红外3.39微

关键词：频率稳定性差频激光器光激射器电子器件复现性谐振腔烷烃甲烷沼气

Complementary Phenotyping of Maize Root system Architecture by Root Pulling Force and X-Ray Imaging

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Plant Phenomics 2021年第1期3卷 298-309页

作者： M.R.shao n.Jiang M.Li A.Howard K.Lehner J.L.Mullen s.L.Gunn J.K.McKay C.n.Topp Donald Danforth Plant science Center Saint LouisMOUSA Department of Agricultural Biology Colorado State UniversityFort CollinsCOUSA

The root system is critical for the survival of nearly all land plants and a key target for improving abiotic stress tolerance,nutrient accumulation,and yield in crop *** many methods of root phenotyping exist,within field studies,one of the most popular methods is the extraction and measurement of the upper portion of the root system,known as the root crown,followed by trait quantification based on manual measurements or 2D ***,2D techniques are inherently limited by the information available from single points of ***,we used X-ray computed tomography to generate highly accurate 3D models of maize root crowns and created computational pipelines capable of measuring 71 features from each *** approach improves estimates of the genetic contribution to root system architecture and is refined enough to detect various changes in global root system architecture over developmental time as well as more subtle changes in root distributions as a result of environmental *** demonstrate that root pulling force,a high-throughput method of root extraction that provides an estimate of root mass,is associated with multiple 3D traits from our *** combined methodology can therefore be used to calibrate and interpret root pulling force measurements across a range of experimental contexts or scaled up as a stand-alone approach in large genetic studies of root system architecture.

关键词： Root crown enough

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印度印刷工业正在成长的市场

印刷技术 2008年第S1期 234-236页

作者： Kanwar n.s. 高晶

印度经济根据最新的世界经济发展指数,印度在整个亚洲大陆已成为第三大经济体,是世界重要的新兴市场之一。同时印度也是世界上少数几个能够在几乎所有业务领域提供高增长前景和赢利潜力的市场之一。当1991年实施经济改革时,印度从封闭的。

关键词：印度政府印刷业务印刷工业印刷机械印刷厂印度经济印刷品世界经济信息技术经济自由化

稀土矿废弃地不同植被恢复模式对土壤肥力的影响

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生态环境学报 2015年第11期24卷 1831-1836页

作者：王友生吴鹏飞侯晓龙岳辉彭绍云马祥庆福建农林大学林学院福建福州350002 福建省龙岩市林业科学研究所福建龙岩364000 福建省长汀县水土保持事业局福建长汀366300 福建省长汀县水土保持站福建长汀366300

以2007年在长汀稀土废弃地建立的不同植被恢复模式为研究对象,于2012年通过对不同模式下土壤的理化性质分析,筛选出南方离子型稀土矿开采废弃地最佳植被恢复模式。植被恢复模式主要采用适应能力强的乡土植物(宽叶雀稗Paspalum wettstei... 详细信息

以2007年在长汀稀土废弃地建立的不同植被恢复模式为研究对象,于2012年通过对不同模式下土壤的理化性质分析,筛选出南方离子型稀土矿开采废弃地最佳植被恢复模式。植被恢复模式主要采用适应能力强的乡土植物(宽叶雀稗Paspalum wettsteinii、胡枝子Lespedeza bicolor、木荷schima superba、枫香Liquidambar formosana、火力楠Michelia macclurei、山杜英Elaeocarpus sylvestris、油茶Camellia oleifera),按草-灌-乔方式不同配置模式进行植被恢复。2012年在长汀稀土废弃地的堆积池和取土场两个功能区每个试验地上,布设10个10 m×10 m样方,分析土壤理化性质,同时在每块试验地上使用10cm×10 cm×10 cm白铁盒采集5个样品,用于分析土壤水稳定团聚体。采用隶属函数综合评判法对各种植被恢复模式进行土壤肥力评价。研究结果表明:取土场与废弃堆中不同植被恢复模式土壤理化性质存在显著差异,取土场植被恢复后土壤p H值、容重降低,其余指标则表现出不同程度提高;废弃堆植被恢复后土壤理化性质变化与取土场略有不同,表现为土壤容重、水解性氮比对照地下降,其余指标有所提高。不同植被恢复模式的土壤肥力存在显著差异,"宽叶雀稗+胡枝子+木荷+枫香+山杜英"模式的肥力指数达0.544,是长汀稀土矿取土场较好的植被恢复模式,对土壤肥力的改良效果较好;"宽叶雀稗+胡枝子+木荷+枫香+巨桉"恢复模式的肥力指数达0.472,对废弃堆的土壤肥力改良效果较好。

关键词：稀土矿废弃地土壤理化性质土壤肥力植被恢复模式

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适合于项目教学法的三合一单片机实验箱设计

实验技术与管理 2013年第7期30卷 55-59页

作者：朱向庆黎东涛苏超益丘祖国张学成嘉应学院电子信息工程学院广东梅州514015

从帮助学生掌握单片机硬件电路知识、增强编程能力的角度出发,设计一种适合项目教学法,集仿真、下载与实验三合一的多功能单片机实验箱。实验箱的I/O口及外围功能模块硬件资源完全开放,操作者可以使用汇编语言及C51语言设计程序,或者运... 详细信息

从帮助学生掌握单片机硬件电路知识、增强编程能力的角度出发,设计一种适合项目教学法,集仿真、下载与实验三合一的多功能单片机实验箱。实验箱的I/O口及外围功能模块硬件资源完全开放,操作者可以使用汇编语言及C51语言设计程序,或者运行small RTOs51和μC/Os-II操作系统完成实验项目。实验箱能够实现硬件仿真和调试功能,还可通过计算机串口将编译器生成的机器码下载至单片机,完成18个项目的实验。实践证明,自制的实验箱性价比高,可满足单片机实验教学、课程设计、开放实验室项目等的需求。

关键词：单片机实验箱项目教学法硬件仿真下载实验

The spike protein of sARs-CoV-2 variant A.30 is heavily mutated and evades vaccine-induced antibodies with high efficiency

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Cellular & Molecular Immunology 2021年第12期18卷 2673-2675页

作者： Prerna Arora Cheila Rocha Amy Kempf Inga nehlmeier Luise Graichen Martin s.Winkler Martin Lier sebastian schulz Hans-Martin Jäck Anne Cossmann Metodi V.stankov Georg M.n.Behrens stefan Pöhlmann Markus Hoffmann Infection Biology Unit German Primate CenterKellnerweg 437077GöttingenGermany Faculty of Biology and Psychology Georg-August-University GöttingenWilhelmsplatz 137073GöttingenGermany Department of Anesthesiology University of Göttingen Medical CenterGeorg-August University of GöttingenRobert-Koch-Straße 4037075GöttingenGermany Division of Molecular Immunology Department of Internal Medicine 3Friedrich-Alexander University of Erlangen-NürnbergGlückstraße 691054ErlangenGermany Department for Rheumatology and Immunology Hannover Medical SchoolCarl-Neuberg-Straße 130625HannoverGermany

The COVID-19 pandemic,caused by sARs-CoV-2,continues to rage in many countries,straining health systems and *** protect against severe disease and death and are considered central to ending the ***-19 vaccines(and sARs-CoV-2 infection)elicit antibodies that are directed against the viral spike(s)protein and neutralize the ***,the emergence of sARs-CoV-2 variants with s protein mutations that confer resistance to neutralization might compromise vaccine efficacy[1].

关键词： antibodies vaccine death

Toward room-temperature nanoscale skyrmions in ultrathin films

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npj Computational Materials 2020年第1期6卷 58-68页

作者： Anastasiia sVarentcova stephan von Malottki Maria n.Potkina Grzegorz Kwiatkowski stefan Heinze Pavel F.Bessarab ITMO University St.Petersburg 197101Russia science Institute University of IcelandReykjavík 107Iceland Kavli Institute of nanoscience Delft University of TechnologyP.O.Box 4056Delft 2600 GAThe Netherlands Institute of Theoretical Physics and Astrophysics University of KielLeibnizstrasse 15Kiel 24098Germany st.Petersburg state University St.Petersburg 198504Russia Peter Grünberg Institute and Institute for Advanced simulation Forschungszentrum JülichJülich 52425Germany

Breaking the dilemma between small size and room-temperature stability is a necessary prerequisite for skyrmion-based information *** we demonstrate by means of rate theory and an atomistic spin Hamiltonian that the stability of isolated skyrmions in ultrathin ferromagnetic films can be enhanced by the concerted variation of magnetic interactions while keeping the skyrmion size *** predict film systems where the lifetime of sub-10 nm skyrmions can reach years at ambient conditions.

关键词： conditions stability films

Investigation of surface Free Energy for PTFE Polymer by Bipolar Argon Plasma Treatment

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Journal of surface Engineered Materials and Advanced Technology 2012年第2期2卷 132-136页

作者： s. M. Pelagade n. L. singh R. s. Rane s. Mukherjee U. P. Deshpande V. Ganesan T. shripathi Department of Physics The Maharaja Sayajirao University of Baroda Vadodara India FCIPT Institute for Plasma Research Gandhinagar India FCIPT Institute for Plasma Research Gandhinagar India 3UGC-DAE-CsR Indore India. UGC-DAE-CsR Indore India UGC-DAE-CsR Indore India.

The low ion energy argon plasma was used for surface modification of Poly tetra fluoroethylene (PTFE) polymer. The plasma was generated between two plane metal electrode by using 50 kHz bipolar power supply. The plasma treated surface was characterized by atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPs). The surface free energy (sFE) of plasma treated surface was calculated from contact angle measurement. sFE increases from 33.39 mJ/m2 to 41.40 mJ/m2 with the increase in plasma treatment time and the corresponding contact angle changed from 76? to 60?. XPs study shows that F/C ratio change from 1.8 (untreated) to 1.3 (treated) and O/C ratio changes from 0.094 (untreated) to 0.148 (treated). The XPs analysis shows that both F1s and the C1s spectra for PTFE are marginally modified by plasma treatment. AFM study shows that the average surface roughness (Ra) increased from 8.5 nm to 22.8 nm after plasma treatment. Vicker’s micro hardness of the film increases upon plasma treatment. The increase in sFE after plasma treatment is attributed to the functionalization of the polymer surface with hydrophilic groups as supported from the above observations.

关键词： PTFE surface Energy XPs AFM Microhardness

Individuals with and without normal tension glaucoma exhibit comparable performance on tests of cognitive function

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International Journal of Ophthalmology(English edition) 2021年第11期14卷 1721-1728页

作者： Qi n.Cui David Green Mohit Jethi Todd Driver Travis C.Porco Jane Kuo shan C.Lin Robert L.stamper Ying Han Cynthia s.Chiu saras Ramanathan Michael E.Ward Katherine Possin Yvonne Ou Department of Ophthalmology University of California San Francisco University of Pennsylvania Francis I.Proctor Foundation University of California San Francisco Glaucoma Center of san Francisco Department of neurology University of California San Francisco neurogenetics Branch National Institute of Neurological Disorders and StrokeNational Institutes of Health

AIM:To evaluate aspects of cognition impacted by individuals with and without normal tension ***:Fifty normal tension glaucoma(nTG)and 50 control patients≥50 y of age were recruited from the UCsF Department of *** data and glaucoma parameters were extracted from electronic medical records for both *** of executive function[Executive Abilities:Measures and Instruments for neurobehavioral Evaluation and Research(EXAMInER)]and learning and memory[California Verbal Learning Test–second Edition(CVLT-II)]were administered to both nTG and ***,handedness,best-corrected visual acuity,maximum intraocular pressure,optic nerve cup-todisc ratio,visual field and optic nerve optical coherence tomography parameters,and a measure of general health(Charlson Comorbidity Index)were compared between nTG and controls as well as within nTG *** linear regression was used to compare group performances on the EXAMInER battery and CVLT-II while controlling for age,sex,and years of ***:nTG and controls were comparable with respect to age,sex,race,education,handedness,and the Charlson Comorbidity Index(P>0.05 for all).Performance on the EXAMInER composite score and the CVLT-II did not differ between nTG and controls(P>0.05 for both).COnCLUsIOn:This is the first prospective study in which the cognitive function of subject with nTG were evaluated using a comprehensive,computerized neurocognitive *** with nTG do not perform worse than unaffected controls on tests of executive function,learning,and memor *** do not suppor t the hypothesis that individuals with nTG are at higher risk for cognitive dysfunction and/or dementia.

关键词： low tension glaucoma dementia mild cognitive impairment neurodegeneration memory and executive function

Effect of Baroclinicity on Vortex Axisymmetrization. Part Ⅰ:Barotropic Basic Vortex

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Advances in Atmospheric sciences 2014年第6期31卷 1256-1266页

作者： Melinda s.PEnG Jiayi PEnG Tim LI Eric HEnDRICKs naval Research Laboratory Monterey California USA IMsG at Environmental Modeling Center NCEP/NOAA College Park Maryland USA Department of Meteorology and IPRC University of Hawaii at Manoa Honolulu Hawaii USA

The barotropic and baroclinic disturbances axisymmetrized by the barotropic basic vortex are examined in an idealized modeling framework consisting of two *** a Wentzel-Kramers-Brillouin approach,the radial propagation of a baroclinic disturbance is shown to be slower than a barotropic disturbance,resulting in a slower linear axisymmetrization for baroclinic *** slower-propagating baroclinic waves also cause more baroclinic asymmetric kinetic energy to be transferred directly to the barotropic symmetric vortex than from barotropic disturbances,resulting in a faster axisymmetrization process in the nonlinear baroclinic wave case than in the nonlinear barotropic wave case.

关键词： vortex axisymmetrization asymmetry baroclinicity