检索结果-南通市图书馆

Mathematical Models Developed by Zone Method Considering Non-Gray Radiation Properties of Gas in Combustion Chamber

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2010年第11期17卷 13-18页

作者： cui Miao CHEN hai-geng GAO Xiao-wei State Key Laboratory of Structural Analysis for Industrial Equipment Dalian University of Technology Dalian 116024Liaoning China School of Materials and Metallurgy Northeastern University Shenyang 110004 Liaoning China

Water vapour and carbon dioxide as the main products in combustion chamber have strong non-gray radiation properties. Multidimensional mathematical models were developed by zone method considering the non-gray radiation properties of gas in combustion chamber. Edwards exponential wide band model （EBWM） was adopted to calculate the non-gray radiation properties of gas, and the three-point Gauss-Legendre integral formula was used to calculate direct radiation exchange areas. Reflected radiation heat fluxes were obtained by Gauss elimination method, and energy balance equations were solved by main variable correction method. An example was given to validate the developed models, and further investigation of effects of flame distribution on heat transfer was carried on.

关键词： zone method non-gray radiation combustion chamber

Impacts of Land Use and Cover Change on Land Surface Temperature in the Zhujiang Delta

在线全文

学校读者我要写书评

暂无评论

Pedosphere 2006年第6期16卷 681-689页

作者： QIAN Le-Xiang cui hai-Shan CHANG Jie School of Geographical Sciences Guangzhou University Guangzhou 510006China College of Environment ＆ Planning Henan University Kaifeng 475004China program in Geographic Information Sciences University of Texas at Dallas Richardson TX 75083 USA

Remote sensing and geographic information systems (GIS) technologies were used to detect land use/cover changes (LUCC) and to assess their impacts on land surface temperature (LST) in the Zhujiang Delta. Multi-temporal Landsat TM and Landsat ETM+ data were employed to identify patterns of LUCC as well as to quantify urban expansion and the associated decrease of vegetation cover. The thermal infrared bands of the data were used to retrieve LST. The results revealed a strong and uneven urban growth,which caused LST to raise 4.56℃in the newly urbanized part of the study area. Overall, remote sensing and GIS technologies were effective approaches for monitoring and analyzing urban growth patterns and evaluating their impacts on LST.

关键词： land surface temperature land use/cover change Landsat ETM+ Landsat TM Zhujiang Delta

Self-assembly Behavior of Symmetrical Linear ABCA Tetrablock Copolymer:A Self-consistent Field Theory Study

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2018年第7期36卷 888-896页

作者： Dan Liu ying-ying Wang ying-Chun Sun Yuan-Yuan Han Jie cui Wei Jiang School of Physics Northeast Normal UniversityChangchun 130024China State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China University of Chinese Academy of Sciences Beijing 100049China

ABCA tetrablock copolymers offer new opportunities for design of materials with novel structures. Using real-space self- consistent field theory and simulation, we systematically examined the self-assembly behavior of linear ABCA tetrablock copolymers in a 2D space. The simulation was carried out under conditions of symmetrical compositions and interactions. We focus on the influence of chain length ratio of block A and interactions between block A and other blocks B and C on the self-assembly behavior of the copolymer system. The simulation results show that most of the structures self-assembled by the ABCA tetrablock copolymers are centrosymmetric, such as diblock-like lameUa phase, two kinds of lameUae with beads at interface, two kinds of hierarchical lamella phase, hexagonal honeycomb-like phase, lamella phase with mixed BC and hexagonal spheres with mixed BC. Furthermore, we find that a novel noncentrosymmetric Janus spheres can be obtained when the interaction between blocks B and C is strong, whereas a noncentrosymmetric lamella phase was obtained at weak interaction between blocks B and C. Phase diagrams for the ABCA tetrablock copolymers with different interaction strength between blocks B and C are constructed by comparing free energies of candidate ordered structures. In addition, studies on the metastable behavior of the system reveal that enthalpy plays an important role in the metastable behavior of the ABCA tetrablock copolymer system. Our work can provide useful guide for structure control of such kind of tetrablock copolymers in experiments.

关键词： Self-assembly Tetrablock copolymer Self-consistent field Simulation

The cGAS-STING-interferon regulatory factor 7 pathway regulates neuroinflammation in Parkinson's disease

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第8期20卷 2361-2372页

作者： Shengyang Zhou Ting Li Wei Zhang Jian Wu Hui Hong Wei Quan Xinyu Qiao Chun cui Chenmeng Qiao Weijiang Zhao Yanqin Shen Laboratory of Neurodegenerative and Neuroinjury Diseases Wuxi Medicine SchoolJiangnan UniversityWuxiJiangsu ProvinceChina

Interferon regulatory factor 7 plays a crucial role in the innate immune ***,whether interferon regulatory factor 7-mediated signaling contributes to Parkinson's disease remains *** we report that interferon regulatory factor 7 is markedly up-regulated in a 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine-induced mouse model of Parkinson's disease and co-localizes with microglial *** the selective cyclic guanosine monophosphate adenosine monophosphate synthase inhibitor RU.521 and the stimulator of interferon genes inhibitor H151 effectively suppressed interferon regulatory factor 7 activation in BV2 microglia exposed to 1-methyl-4-phenylpyridinium and inhibited transformation of mouse BV2 microglia into the neurotoxic M1 *** addition,si RNA-mediated knockdown of interferon regulatory factor 7 expression in BV2 microglia reduced the expression of inducible nitric oxide synthase,tumor necrosis factorα,CD16,CD32,and CD86 and increased the expression of the anti-inflammatory markers ARG1 and *** together,our findings indicate that the cyclic guanosine monophosphate adenosine monophosphate synthase-stimulator of interferon genes-interferon regulatory factor 7 pathway plays a crucial role in the pathogenesis of Parkinson's disease.

关键词： cyclic guanosine monophosphate adenosine monophosphate synthase H151 interferon regulatory factor 7 M1 phenotype neurodegenerative disease neuroinflammation Parkinson’s disease RU521 STING type I interferon

Modifying agent selection for Al-7Si alloy by Miedema model

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2012年第2期19卷 131-135页

作者： Zhong-wei Chen cui-ying Ma Pei Chen State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi'an 710072China

To determine the modifying agents for Al-7Si alloys, microstructure observation and mixing enthalpy analysis using Miedema model for Al-7Si alloy with additions of different rare earth elements were performed, and the effects of rare earth elements on the modifica-tion of eutectic silicon morphology were investigated. The results of mixing enthalpy analysis show that these four rare earth elements, La, Sm, Pr, and Ce, which have the large negative mixing enthalpies with Si, can be selected as modifying agents for eutectic silicon morphology. The element with the largest negative mixing enthalpy is Ce. Furthermore, the microstructures indicate that these four elements can effec-tively modify the eutectic （α）Al-Si crystals in Al-7Si alloy, and the most effective one is also Ce. Differential scanning calorimetry （DSC） results show that the eutectic temperature depressions due to the additions of modifying agents are the important reasons for the modification of eutectic （α）Al-Si crystals.

关键词： aluminum alloys silicon alloys modifying agents rare earth elements microstructure enthalpy

Accumulation of Carbohydrate and Regulation of 14-3-3 Protein on Sucrose Phosphate Synthase(SPS) Activity in Two Tomato Species

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2014年第2期13卷 358-364页

作者： WANG Li cui Na ZHAO Xiao-cui FAN hai-yan LI Tian-lai Biological Science and Technology College Shenyang Agricultural University Key Laboratory of Protected Horticulture Ministry of Education/College of HorticultureShenyang Agricultural University

To explore the differences of carbohydrate metabolism in two tomato species and discuss the possible regulation of 14-3-3 proteins on the sucrose phosphate synthase （SPS） activity, we determined the contents of soluble sugar and starch through high performance liquid chromatography （HPLC）. The activities of sugar-metabolizing enzymes were assayed in desalted extract, and the relative expression levels of related genes in sugar metabolism were determined though real-time RT-PCR. The results indicated that glucose and fructose were mainly accumulated during the maturation of the fruit because of the high acid invertase （AI） and neutral invertase （NI） in Micro-Tom （Solanum lycopersicum） fruit, while in Solanum chmielewskii fruit, SPS which went along with the change of sucrose content led to the rapid sucrose increase during the fruit ripening. TFT1 and TFT10, belonging to 14-3-3 protein in tomato, were likely to down-regulated SPS activity during young and intumescence period.

关键词： Micro-Tom Solanum chmielewskii carbohydrate accumulation 14-3-3 proteins fruit development

p66Shc-mediated oxidative stress is involved in gestational diabetes mellitus

在线全文

学校读者我要写书评

暂无评论

World Journal of Diabetes 2021年第11期12卷 1894-1907页

作者： Ting-Ting Huang Wen-Juan Sun hai-ying Liu Hong-Li Ma Bao-Xia cui Cheeloo College of Medicine Shandong UniversityJinan 250000Shandong ProvinceChina Department of Obstetrics Taian City Central HospitalTaian 271000Shandong ProvinceChina Department of Obstetrics The Second HospitalCheeloo College of MedicineShandong UniversityJinan 250000Shandong ProvinceChina Department of Obstetrics and Gynecology Qilu Hospital(Qingdao)Cheeloo College of MedicineShandong UniversityQingdao 266000Shandong ProvinceChina Department of Obstetrics and Gynecology Qilu HospitalCheeloo College of MedicineShandong UniversityJinan 250013Shandong ProvinceChina

BACKGROUND Gestational diabetes mellitus(GDM)is associated with a heightened level of oxidative stress,which is characterized by the overproduction of reactive oxygen species(ROS)from *** studies showed that mitochondrial dysfunction is regulated by dynamin-related protein 1(Drp1)and p66Shc in *** The aim was to investigate the expression of Drp1 and p66Shc and their possible mechanisms in the pathogenesis of *** A total of 30 pregnant women,15 with GDM and 15 without GDM,were *** blood mononuclear cells and placental tissue were *** human JEG3 trophoblast cell line was cultivated in 5.5 mmol/L or 30 mmol/L glucose and transfected with wild-type(wt)-p66Shc and p66Shc siRNA.P66Shc and Drp1 mRNA levels were detected by quantitative real-time polymerase chain *** expression of p66Shc and Drp1 was assayed by immunohistochemistry and western *** was assayed by dihydroethidium *** The p66Shc mRNA level was increased in the serum(P<0.01)and placentas(P<0.01)of women with GDM,and the expression of Drp1 mRNA and protein were also increased in placentas(P<0.05).In JEG3 cells treated with 30 mmol/L glucose,the mRNA and protein expression of p66Shc and Drp1 were increased at 24 h(both P<0.05),48 h(both P<0.01)and 72 h(both P<0.001).ROS expression was also *** levels of Drp1 and ROS expression were detected in JEG3 cells transfected with wt-p66Shc(P<0.01),and low levels were detected in JEG3 cells transfected with p66Shc siRNA(P<0.05).CONCLUSION The upregulated expression of Drp1 and p66shc may contribute to the occurrence and development of *** of the mitochondrial fusion-fission balance could be a novel strategy for GDM treatment.

关键词： p66Shc Dynamin-related protein 1 Gestational diabetes mellitus Oxidative stress Mitochondrial dysfunction

Association between admission hemoglobin level and prognosis in patients with type 2 diabetes mellitus

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

World Journal of Diabetes 2021年第11期12卷 1917-1927页

作者： hai-ying Song cui-Mei Wei Wen-Xiong Zhou Hao-Fei Hu Qi-Jun Wan Department of Nephrology The First Affiliated Hospital of Shenzhen UniversityShenzhen Second People’s HospitalShenzhen 518035Guangdong ProvinceChina Department of Nephrology Shenzhen University Health Science CenterShenzhen 518035Guangdong ProvinceChina

BACKGROUND Anaemia is common in patients with chronic kidney disease(CKD)and is a major risk factor that contributes to mortality in such *** 2 diabetes mellitus(T2DM)is one of the leading causes of *** association between admission hemoglobin levels and renal damage in patients with T2DM remains *** To evaluate the relationship between admission hemoglobin levels and prognosis in patients with *** We performed a retrospective analysis of 265 consecutive patients presenting with T2DM between 2011 and *** composite endpoint was end-stage renal disease or a 50%reduction in the estimated glomerular filtration *** In multivariable-adjusted Cox proportional hazards models(adjusting for demographic factors,traditional risk factors,lipids),the adjusted hazard ratios(HRs)for the highest and middle tertiles compared to the lowest tertile of hemoglobin were 0.82(95%CI:0.11-6.26,P=0.8457)and 0.28(95%CI:0.09-0.85,P=0.0246),***,after further adjustment for glycaemia control,hemoglobin was positively related to the risk of the composite endpoint(HR:1.05,95%CI:0.14-8.09,P=0.9602)when the highest tertile was compared to the lowest tertile of *** found a U-shaped relationship between hemoglobin levels and the composite *** curve tended to reach the lowest level at an optimal hemoglobin *** Among patients with T2DM,a U-shaped relationship was observed between hemoglobin levels and renal damage.A lower admission hemoglobin level(hemoglobin<13.3 g/dL)is an independent predictor of renal damage.

关键词： Type 2 diabetes mellitus Hemoglobin Renal damage Prognosis

DESIGN AND ANALYSIS OF THE GREEN CLIMATE FUND

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

Journal of Systems Science and Systems Engineering 2014年第3期23卷 266-299页

作者： Lian-biao cui Lei ZHU Marco SPRINGMANN ying FAN Center for Energy and Environmental Policy Research Institute of Policy and ManagementChinese Academy of Sciences Department of Economics University of Oldenburg

The Green Climate Fund （GCF） has been one of the core issues of the world climate summits under the United Nations Framework Convention on Climate Change （UNFCCC） in recent years. However, the GCF has not progressed smoothly, and currently there are no satisfactory schemes for raising and distributing the fund. This paper first discusses how to finance the GCF among Annex II countries. It introduces the ＇preference score compromises＇（PSC） approach which is based on environmental responsibility and economic capacity, with historical emissions as an indicator for environmental responsibility and GDP as indicator for economic capacity. The results show that the United States and the European Union are the two largest contributors to the GCF, sponsoring more than 80% of the funds. Second, we discuss how to allocate the funds among non-Annex II parties. The ＇adaptation needs＇（AN） approach, which takes account of economic strength and climate damages, is proposed to achieve the adaptation purpose of the GCF, and the results reveal that African countries with high levels of climate vulnerability could get most funds, with a share of almost 30%. Regarding the mitigation purpose of the GCF, this research introduces two approaches： the ＇carbon reduction contribution＇（CC） approach and the ＇incremental cost＇（IC） approach. Both approaches could achieve significant reductions in carbon emissions in non-Annex II parties, whereas the latter may provide limited adaptation finance but result in more mitigation effects. This paper also develops a method to combine abatement efficiency and adaptation fairness of the GCF, and we find that with an equal split between the AN and CC （or AN and IC） approaches, the amount of USD 100 billion could finance an emissions reduction of 1613 MtCO2 （2477 MtCO2）, while allocating USD 16 （or USD 9） per capita for adaptation in non-Annex II parties. The schemes proposed may be useful for promoting the development of the GCF in the future.

关键词： Climate change green climate fund preference score compromises carbon reductioncontribution mitigation and adaptation