检索结果-南通市图书馆

A comparative study of countries' responsibilities for carbon dioxide emission in an open economy

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Population,Resources and Environment 2015年第3期13卷 198-205页

作者： Ying zhi xu jin Guo School of Economics and Management Southeast University

In an open economy,embodied carbon dioxide emissions in international trade should be taken into consideration to scientifically define each country's emissions *** this study,a multiregional input-output model is constructed to calculate the embodied carbon dioxide emissions of 25 World Trade Organization members,including China,according to the producer-consumer shared responsibility *** study indicates that:it is fairer and more efficient to identify each country's carbon dioxide emissions responsibility according to the shared responsibility principle;China's producer responsibility is 1.4 times that of the USA,while China's consumer responsibility is only one-tenth that of the USA;according to the producer responsibility principle,China shoulders the greatest *** to the producerconsumer shared responsibility principle,China's responsibility shows a large *** endowment,economic development stage,and trade structure account for the abovementioned changes in China's emissions responsibility.

关键词： multiregional input-output model embodied carbon emission shared principle

在线全文

学校读者我要写书评

暂无评论

首发抑郁症患者血清脂肪因子水平的研究

神经损伤与功能重建 2015年第5期10卷 416-417页

作者：万其容胡亚荣徐金枝易军华中科技大学同济医学院附属梨园医院精神心理科武汉430077 华中科技大学同济医学院附属同济医院神经内科武汉430030

目的:探讨首发抑郁症患者瘦素、脂联素及抵抗素等血清脂肪因子的水平。方法:首发抑郁症患者60例纳入抑郁组,健康体检者40例纳入对照组,进行体脂参数及瘦素、脂联素和抵抗素水平的测定。结果:2组体脂参数差异无统计学意义(P>0.05)。抑郁... 详细信息

目的:探讨首发抑郁症患者瘦素、脂联素及抵抗素等血清脂肪因子的水平。方法:首发抑郁症患者60例纳入抑郁组,健康体检者40例纳入对照组,进行体脂参数及瘦素、脂联素和抵抗素水平的测定。结果:2组体脂参数差异无统计学意义(P>0.05)。抑郁组血浆瘦素、脂联素浓度显著低于对照组(P0.05);2组内女性的瘦素水平均明显高于同组男性(P0.05)。结论:首发抑郁症患者存在一定水平的瘦素和脂联素浓度异常。

关键词：抑郁症瘦素脂联素抵抗素

舍曲林联合氨磺必利治疗难治性强迫症的临床研究

在线全文

学校读者我要写书评

暂无评论

神经损伤与功能重建 2016年第2期11卷 138-140页

作者：万其容胡亚荣徐金枝易军华中科技大学同济医学院附属梨园医院精神心理科武汉430077 华中科技大学同济医学院附属同济医院神经内科武汉430030

目的:探讨舍曲林联合氨磺必利治疗难治性强迫症的临床疗效及安全性。方法:难治性强迫症患者45例,随机分为对照组23例和实验组22例。对照组单用舍曲林,实验组给予舍曲林合并氨磺必利治疗,均治疗8周。治疗前后采用耶鲁-布朗强迫量表(Y-BO... 详细信息

目的:探讨舍曲林联合氨磺必利治疗难治性强迫症的临床疗效及安全性。方法:难治性强迫症患者45例,随机分为对照组23例和实验组22例。对照组单用舍曲林,实验组给予舍曲林合并氨磺必利治疗,均治疗8周。治疗前后采用耶鲁-布朗强迫量表(Y-BOCS)评定强迫症严重程度,不良反应量表(TESS)评定不良反应。结果:治疗8周后,对照组和实验组的总有效率分别为66.7%、90.1%,实验组优于对照组,差异有统计学意义(P<0.05)。治疗2周和4周后,实验组Y-BOCS评分较对照组降低(P<0.05),治疗8周末实验组的Y-BOCS评分较对照组显著降低(P<0.01)。2组组内比较,除对照组在治疗2周末与治疗前比较Y-BOCS评分差异不明显,其余各周评分与治疗前比较均有显著性差异(P<0.01)。2组的不良反应中,唾液增多差异有统计学意义(P<0.05)。结论:舍曲林联合氨磺必利治疗难治性强迫症与舍曲林单药治疗比较,起效更早、疗效更好,安全性较好。

关键词：难治性强迫症舍曲林氨磺必利

A machine learning framework for low-field NMR data processing

在线全文

学校读者我要写书评

暂无评论

Petroleum Science 2022年第2期19卷 581-593页

作者： Si-Hui Luo Li-zhi Xiao Yan jin Guang-zhi Liao Bin-Sen xu Jun Zhou Can Liang College of Artificial Intelligence and College of Petroleum Engineering China University of PetroleumBeijing102249China China National Logging Corporation Xi©anShaanxi 710076China Changzhou Institute of Technology ChangzhouJiangsu213000China

Low-field(nuclear magnetic resonance)NMR has been widely used in petroleum industry,such as well logging and laboratory rock core ***,the signal-to-noise ratio is low due to the low magnetic field strength of NMR tools and the complex petrophysical properties of detected *** the noise and highlighting the available NMR signals is very important for subsequent data *** denoising methods are normally based on fixed mathematical transformation or handdesign feature selectors to suppress noise characteristics,which may not perform well because of their non-adaptive performance to different noisy *** this paper,we proposed a“data processing framework”to improve the quality of low field NMR echo data based on dictionary *** learning is a machine learning method based on redundancy and sparse representation *** information in noisy NMR echo data can be adaptively extracted and reconstructed by dictionary *** advantages and application effectiveness of the proposed method were verified with a number of numerical simulations,NMR core data analyses,and NMR logging data *** results show that dictionary learning can significantly improve the quality of NMR echo data with high noise level and effectively improve the accuracy and reliability of inversion results.

关键词： Dictionary learning Low-field NMR Denoising Data processing T_(2)distribution

Nanopore techniques as a potent tool in the diagnosis and treatment of endophthalmitis:a literature review

在线全文

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2022年第12期15卷 2009-2016页

作者： Zi-Yue Li Ke-Yi-zhi xu Wei jin Eye Center Renmin Hospital of Wuhan UniversityWuhan 430060Hubei ProvinceChina The Computer School of Wuhan University Wuhan 430072Hubei ProvinceChina

Endophthalmitis is a serious ophthalmic disease characterized by changes in the eye's posterior segment,such as hypopyon and intraocular inflammation,vitritis being a ***-caused endophthalmitis can lead to irreversible vision loss,accompanied by eye pain or eye distention,and in the most severe cases the removal of the *** such as bacteria,fungi,viruses,and parasites typically account for the disease and the entry pathways of the microbial can be divided into either endogenous or exogenous approaches,according to the origin of the etiological *** endophthalmitis can be derived from various occasions(such as postoperative complications or trauma)while endogenous endophthalmitis results from the bloodstream which carries pathogens to the *** review aims to summarize the application of new technology in pathogen identification of endophthalmitis so as to prevent the disease and better guide clinical diagnosis and treatment.

关键词： postoperative endophthalmitis high-throughput sequencing metagenomics long-read nanopore targeted sequencing pathogen identification

Grain Refining Efficiency of SHS Al-Ti-B-C Master Alloy for Pure Aluminum and Its Effect on Mechanical Properties

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2016年第8期29卷 742-747页

作者： xu-Guang An Ying Liu jin-Wen Ye Lin-zhi Wang Peng-Yue Wang School of Materials Science and Engineering Sichuan University Key Laboratory of Advanced Special Material and Technology Ministry of Education

A new Al-5Ti-0.75B-0.2C master alloy was successfully prepared by self-propagating high-temperature（SHS）reaction from an Al-Ti-B_4C system with molten *** and phase characterization of the prepared Al-5Ti-0.75B-0.2C master alloy show that the nearly spherical TiC particles,hexagonal or rectangular TiB_2 particles,and blocklike TiAl_3 particles distribute uniformly in the aluminum *** refining test on commercial pure aluminum indicates that Al-5Ti-0.75B-0.2C master alloy exhibits a better grain refining performance than Al-5Ti-lB master *** addition of 0.2 wt%Al-5Ti-0.75B-0.2C master alloy,the average grain size of a-Al can be effectively refined to160 ± 5 μm from about 3000 μm,and the tensile strength and elongation are increased by about 20%and 14.1%due to the grain refinement.

关键词： Aluminum Al-Ti-B-C master alloy Self-propagating high-temperature(SHS) Grain refinement Mechanical properties

Quasi-static motion of microparticles at the depinning contact line of an evaporating droplet on PDMS surface

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2017年第9期60卷 63-69页

作者： Ying-Song Yu xue-Lian Xia xu Zheng Xianfu Huang jin-zhi Zhou Department of Mechanics School of Civil Architecture and Environment Hubei University of Technology State Key Laboratory of Nonlinear Mechanics Institute of Mechanics Chinese Academy of Sciences School of Engineering Science University of Chinese Academy of Sciences

In this paper, evaporation of sessile water droplets containing fluorescent polystyrene （PS） microparticles on polydimethylsiloxane （PDMS） surfaces with different curing ratios was studied experimentally using laser confocal microscopy. At the beginning, there were some microparticles located at the contact line and some microparticles moved towards the line. Due to contact angle hysteresis, at first both the contact line and the microparticles were pinned. With the depinning contact line, the microparticles moved together spontaneously. Using the software Image J, the location of contact lines at different time were acquired and the circle centers and radii of the contact lines were obtained via the least square method. Then the average distance of two neighbor contact lines at a certain time interval was obtained to characterize the motion of the contact line. Fitting the distance-time curve at the depinning contact line stage with polynomials and differentiating the polynomials with time, we obtained the velocity and acceleration of both the contact line and the microparticles located at the line. The velocity and the maximum acceleration were, respectively, of the orders of 1 p.m/s and 20-200 nm/s2, indicating that the motion of the microparticles located at the depinning contact line was quasi-static. Finally, we presented a theoretical model to describe the quasi-static process, which may help in understanding both self-pinning and depinning of microparticles.

关键词： droplet evaporation PDMS contact line van der Waals force electrostatic force drag force capillary force

Deflagration-to-Detonation Transition Induced by Hot Jets in a Supersonic Premixed Airstream

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2013年第5期30卷 105-107页

作者： HAN xu ZHOU jin LIN zhi-Yong LIU Yu Science and Technology on Scramjet Laboratory National University of Defense TechnologyChangsha 410073

Detonation is initiated through a hot jet in a supersonic premixed mixture of H2 and air,which is produced by using a air *** results show that initiation fails in the low-equivalence-ratio premixed *** the increase of equivalence ratio,the hot jet can induce deflagration to detonation transition(DDT)in the premixed mixture,which an indirect initiation of *** studies show that the DDT process is due to the combined effect of a local hemispherical explosion shock wave,the bow shock,and the flame produced by the hot jet.

关键词： mixed equivalence shock

Palladium-catalyzed alkynylative[5+1]carboannulation of 1,3-diarylprop-2-yn-1-yl acetates with terminal alkynes enabled by C-H functionalization

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Organic Chemistry Frontiers 2022年第5期9卷 1389-1394页

作者： Jiang-Xi Yu Li-Jun Wu zhi-Qiang Wang zhi-Feng xu jin-Heng Li Key Laboratory of Functional Meta-Organic Compounds of Hunan Province Key Laboratory of Functional Organometallic Materials(University of Hunan Province)Hengyang Normal UniversityHengyang 421008China College of Sciences Central South University of Forestry and TechnologyChangsha410004China Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle Nanchang Hangkong UniversityNanchang 330063China School of Chemistry and Chemical Engineering Henan Normal UniversityXinxiangHenan 475004China

A new method for the synthesis of 3-ethynyl-1-methylene-1,2-dihydronaphthalenes via copper-pro-moted palladium-catalyzed intermolecular alkynylative[5+1]carboannulation of 1-arylphenyl-prop-2-yn-1-yl acetates involving C–H functionalization is *** terminal alkyne molecules serve as an alkynylation reagent and a one-carbon unit to enable alkynylative[5+1]carboannulation with excellent selectivity control,broad substrate scope and good tolerance of functional groups.

关键词： catalyzed Palladium palladium