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现代都市生活消费性物流探析

交通运输系统工程与信息 2008年第5期8卷 10-14页

作者：申金升北京市商务局北京100010

近年来,随着现代都市规模扩大和人口增长,生活消费总量和规模不断扩大,而生活消费品的稳定持续供应关系着居民的日常生活、城市的正常运行和社会的稳定团结,因此发展都市生活消费性物流意义重大.本文首先分析了都市生活消费性物流的内... 详细信息

近年来,随着现代都市规模扩大和人口增长,生活消费总量和规模不断扩大,而生活消费品的稳定持续供应关系着居民的日常生活、城市的正常运行和社会的稳定团结,因此发展都市生活消费性物流意义重大.本文首先分析了都市生活消费性物流的内涵、特点、意义;再从系统的观点出发,架构了由设施支撑平台、政策保障平台和信息推动平台有机组成的都市生活消费性物流系统结构,并分析生活消费物流系统的运作流程,包括外部流通、内部流通和末端配送三个环节的流通;最后提出促进现代都市生活消费性物流发展的相关建议.

关键词：都市生活消费性物流系统流通

Genotypic Differences in Grain Yield and Physiological Nitrogen Use Efficiency Among Rice Cultivars

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Pedosphere 2009年第6期19卷 681-691页

作者： ZHANG Ya-Li, FAN Jian-Bo, WANG Dong-sheng and shen Qi-Rong2College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095 (China) College of Resources and Environmental Sciences Nanjing Agricultural University Nanjing 210095 (China)

Efficient use of N in agricultural practice can increase yield, decrease production costs and reduce the risk of environmental pollution. Effects of N fertilizer application rates on grain yield and physiological N use efficiency (PE) in relation to the accumulation and redistribution of biomass and N in rice (Oryza sativa L.) cultivars were studied at two experimental farms of Nanjing Agricultural University, Nanjing, China in 2004. Three high N use efficiency (NUE) rice cultivars (Wuyunjing 7, Nanguang and 4007) and one low NUE rice cultivar (Elio) with similar growth patterns were studied under seven N rates (0, 60, 120, 180, 240, 300 and 360 kg ha -1 ). Grain yield increased with the N application rate and attained plateau at 180 kg N ha -1 for rice cultivars at each site. Increasing N rate decreased PE for biomass and grain yield. Grain yield and PE of Elio were about 20% and 18% lower than those of high NUE cultivars. Differences in biomass, N accumulation and N redistribution were observed at the post-heading stage among rice cultivars with differing NUEs. The less reproductive tillers of Elio resulted in less demand for C and N during grain filling, thus leading to lower PE of Elio compared with the high NUE rice cultivars.

关键词： accumulation biomass N application rate redistribution

Dynamic-mechanical analysis and SEM morphology of wood flour/polypropylene composites

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Journal of Forestry Research 2006年第4期17卷 315-318页

作者： GUO Chui-gen SONG Yong-ming WANG Qing-wen shen Chang-sheng MOE Key Laboratory of Bio-based Material Science and Technology Northeast Forestry University Harbin 150040 P. R. China

A study was conducted to investigate the effects of compatibilizers, including Maleic anhydride grafted polypropylene （MA-PP） and maleic anhydride grafted ethylene-propylene-diene copolymer （MA-EPDM）, on wood-flour/polypropylene （WF/PP） composites. WF/PP composites were prepared by direct extrusion profiles using a twin-screw/single-screw extruder system. DMA analysis showed that the loss factor of composites decreased and the storage modulus improved in the presence of MA-PP, which indicated much better interfacial adhesion between the PP matrix and wood flour filler than in the absence of compatibilizer. Morphological feature based on SEM observation showed that MA-PP and MA-EPDM improved the dispersion of the wood particles in the plastic matrix. MA-EPDM is a soft segment, although it improved the interfacial adhesion, storage modulus decreases with adding of MA-EPDM. As compatibilizer of wood-flour/polypropylene composites, both DMA analysis and SEM feature proved that MA-PP was superior to MA-EPDM.

关键词： Wood flour Polypropylene Composites Dynamic-mechanical analysis

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水蒸气超音速非平衡凝结流动中的激波效应

工程热物理学报 2009年第4期30卷 635-637页

作者：杨勇沈胜强大连理工大学海洋能源利用与节能教育部重点实验室辽宁大连116024

对水蒸气超音速非平衡凝结流动进行了数值模拟,研究了水蒸气超音速流动过程中的非平衡相变及凝结激波现象,揭示了压缩激波与核化凝结流动之间相互作用的非平衡流动规律。发现了激波的耗散效应对非平衡相变的影响,探讨了激波发生时,波阵... 详细信息

对水蒸气超音速非平衡凝结流动进行了数值模拟,研究了水蒸气超音速流动过程中的非平衡相变及凝结激波现象,揭示了压缩激波与核化凝结流动之间相互作用的非平衡流动规律。发现了激波的耗散效应对非平衡相变的影响,探讨了激波发生时,波阵面处核化凝结、液滴生长的变化规律。

关键词：水蒸气超音速流动凝结激波

肋片几何形状对仿螺旋肋片内冷通道流动与换热的影响

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航空动力学报 2006年第1期21卷 71-76页

作者：邱庆刚沈胜强大连理工大学能源与动力工程学院辽宁大连116024

利用数值模拟方法，分析了仿螺旋肋片内冷通道在通道宽高比AR=2．9、肋高与通道当量直径比e／Dh=0．336、肋高与通道高度比e／H=0．5、肋片与轴面的夹角β=15°及雷诺数在1×10^4～2×10^5之间时，矩形肋片和楔形肋片对仿螺旋肋片内冷... 详细信息

利用数值模拟方法，分析了仿螺旋肋片内冷通道在通道宽高比AR=2．9、肋高与通道当量直径比e／Dh=0．336、肋高与通道高度比e／H=0．5、肋片与轴面的夹角β=15°及雷诺数在1×10^4～2×10^5之间时，矩形肋片和楔形肋片对仿螺旋肋片内冷通道强化传热与流动阻力特性的影响。计算结果表明，仿螺旋内冷通道平均换热系数得到了明显的提高，但同时流动阻力也显著增加。在所研究的范围内，矩形仿螺旋肋片内冷通道的换热强化比要高于同等几何排列条件下的楔形仿螺旋肋片内冷通道，但其综合肋化效率要低于相同几何排列条件下的楔形仿螺旋肋片内冷通道。

关键词：航空、航天推进系统燃气轮机叶片冷却仿螺旋肋片

Ti_(3)C_(2)T_(x)/SnO_(2)P–N heterostructure construction boosts room-temperature detecting formaldehyde

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Rare Metals 2024年第1期43卷 267-279页

作者： Yue Zhang Ming-Yue Wang Xiao-Guang San Yan-Bai shen Guo-sheng Wang Lei Zhang Dan Meng College of Chemical Engineering Shenyang University of Chemical TechnologyShenyang 110142China Institute for Superconducting and Electronic Materials(ISEM) Australian Institute for Innovative Materials(AIIM)University ofWollongongWollongongNSW2500Australia College of Resources and Civil Engineering Northeastern UniversityShenyang 110819China

Formaldehyde is a common atmospheric pollutant produced in industrial production and daily ***,the traditional semiconductor formaldehyde gas sensor cannot work at room temperature,which limits its practical ***,developing high-performance gas sensors for rapidly and accurately detecting formaldehyde at room temperature is an important *** this study,Ti_(3)C_(2)Tx/SnO_(2)heterostructures were constructed,which could selectively detect formaldehyde at room temperature with a response value of 29.16%(10×10^(-6)).In addition,the sensor shows a remarkable theoretical detection limit of 5.09×10^(-9)and good longterm *** functional theory(DFT)simulations reveal that SnO_(2)nano spheres provide the majority of adsorption sites that strongly interact with ***,Ti_(3)C_(2)T_(x)acting as a conductive layer facilitates the transfer of charge carriers so that they show a sensing response to formaldehyde at room ***,the formation of p-n heterostructures between SnO_(2)and Ti_(3)C_(2)T_(x)boosts the Schottky barrier at the interface,which is the critical factor in enhancing the sensing properties by turning the Schottky barrier upon introducing formaldehyde *** perspective is expected to provide instructive guidance for utilizing MXene/metal oxide nanocomposites to improve the gas sensing performance at room temperature.

关键词： Ti_(3)C_(2)T_(x)/SnO_(2)nanocomposites p-n heterostructures Formaldehyde sensing Room temperature DFT calculations

A Study of GaN Grown on SiH_(4) Pre-Treated 6H-SiC Substrates

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Chinese Physics Letters 2012年第1期29卷 268-271页

作者： SONG Shi-Wei LIANG Hong-Wei LIU Yang XIA Xiao-Chuan shen Ren-sheng LUO Ying-Min DU Guo-Tong School of Physics and Optoelectronic Technology Dalian University of TechnologyDalian 116024 State Key Laboratory on Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012

GaN thin films are grown on Si-terminated (0001) 6H-SiC substrates pre-treated with SiH_(4) in a metal organic chemical vapor deposition *** influence of the SiH_(4) pre-treatment conditions on the SiC surface is carefully *** is found that SiH_(4) could react with the SiC surface oxide,which will change the surface ***,our experiments demonstrate that SiH_(4) pre-treatment can distinctly influence the AlGaN nucleation layer and the basic characteristics of GaN.

关键词： GaN AlGaN (4)

Detection of SARS-CoV-2 based on artificial intelligence-assisted smartphone:A review

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Chinese Chemical Letters 2024年第7期35卷 25-34页

作者： Yunxin Li Jinghui Zhang Jisen Chen Feng Zhu Zhiqiang Liu Peng Bao Wei shen sheng Tang School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China Programme in Emerging Infectious Diseases Duke-NUS Medical SchoolSingapore 169857Singapore

In recent years,the application of smartphone in various fields has received great attention,and it has become a promising tool in virus detection,data processing and data *** the rapid spread of COVID-19 around the world,many traditional detection methods have been combined with smartphone to assist in the analysis and detection of the novel coronavirus(SARS-CoV-2),including electrochemistry,fluorescence and *** the gradual development of artificial intelligence(AI),the combination of AI and smartphone to analyze SARS-CoV-2 was also the focus of *** on the summary of the traditional methods combined with smartphone to detect SARS-CoV-2 virus,in addition to AI-based data processing,AI algorithms are also employed for SARS-CoV-2 detection *** review discussed both strategies and focused on the application of the *** combination of AI algorithm and smartphone to detect SARS-CoV-2 has high accuracy,which is more conducive to meeting the needs of portable *** addition,the classification of SARS-CoV-2 virus samples in biological fluids such as blood and saliva was also ***,this paper briefly discussed the limitations of using smartphone analysis to detect SARS-CoV-2,as well as the prospect and future development of virus *** conclusion,the detection methods based on smartphone and AI algorithms show great potential in the detection of SARS-CoV-2 and can be a valuable complement to traditional analysis methods.

关键词： COVID-19 SARS-CoV-2 virus Detection method Smartphone analysis Artificial intelligence

Circulating proteomic biomarkers for diagnosing sporadic amyotrophic lateral sclerosis:a cross-sectional study

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Neural Regeneration Research 2024年第8期19卷 1842-1848页

作者： Lu He Qinming Zhou Chaoyang Xiu Yaping Shao Dingding shen Huanyu Meng Weidong Le sheng Chen Department of Neurology and Institute of Neurology Ruijin HospitalShanghai Jiao Tong University School of MedicineShanghaiChina Department of Neurology Hospital of Chengdu University of Traditional Chinese MedicineChengduSichuan ProvinceChina Center for Translational Research on Neurological Diseases the First Affiliated HospitalDalian Medical UniversityDalianLiaoning ProvinceChina Co-innovation Center of Neuroregeneration Nantong UniversityNantongJiangsu ProvinceChina Institute of Neurology Sichuan Academy of Medical Sciences-Sichuan Provincial HospitalChengduSichuan ProvinceChina Department of Neurology Xinrui HospitalWuxiJiangsu ProvinceChina

Biomarke rs are required for the early detection,prognosis prediction,and monitoring of amyotrophic lateral sclerosis,a progressive *** is an unbiased and quantitative method that can be used to detect neurochemical signatures to aid in the identification of candidate biomarke *** this study,we used a label-free quantitative proteomics approach to screen for substantially differentially regulated proteins in ten patients with sporadic amyotrophic lateral scle rosis compared with five healthy *** bstantial upregulation of serum proteins related to multiple functional clusters was observed in patients with spo radic amyotrophic lateral *** biomarke rs were selected based on functionality and expression *** validate the proteomics profiles,blood samples from an additional cohort comprising 100 patients with sporadic amyotrophic lateral sclerosis and 100 healthy controls were subjected to enzyme-linked immunosorbent *** substantially upregulated serum proteins in patients with spora dic amyotrophic lateral sclerosis were selected,of which the cathelicidin-related antimicrobial peptide demonstrated the best discriminative ability between patients with sporadic amyotrophic lateral sclerosis and healthy controls(area under the curve[AUC]=0.713,P<0.0001).To further enhance diagnostic accuracy,a multi-protein combined discriminant algorithm was developed incorporating five proteins(hemoglobin beta,cathelicidin-related antimicrobial peptide,talin-1,zyxin,and translationally-controlled tumor protein).The algo rithm achieved an AUC of 0.811 and a P-value of<0.0001,resulting in 79%sensitivity and 71%specificity for the diagnosis of sporadic amyotrophic lateral scle ***,the ability of candidate biomarkers to discriminate between early-stage amyotrophic lateral sclerosis patients and controls,as well as patients with different disease severities,was examined.A two-protein panel comprising talin-1 and transl

关键词： amyotrophic lateral sclerosis cathelicidin-related antimicrobial peptide hemoglobin label-free quantitative proteomics multi-protein combined diagnostic panel serum biomarkers talin-1 translationally-controlled tumor protein zyxin