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    题名 作者 年代 出处 被引量
1“Volume-Point” heat conduction constructal optimization with entransy dissipation minimization objective based on rectangular element显示文摘By taking equivalent thermal resistance, which reflects the average heat conduc- tion effect and is defined based on entransy dissipation, as optimization objective, the 'volume to point' constructal problem of how to discharge the heat generated in a fixed volume to a heat sink on the border through relatively high conductive link is re-analyzed and re-optimized in this paper. The constructal shape of the control volume with the best average heat conduction effect is deduced. For the elemental area and the first order construct assembly, when the thermal current density in the high conductive link is linear with the length, the optimized shapes of assemble based on the minimization of entransy dissipation are the same as those based on minimization of maximum temperature difference, and the mean tem- perature difference is 2/3 of the maximum temperature difference. For the second and higher order construct assemblies, the thermal current densities in the high conductive link are not linear with the length, and the optimized shapes of assem- ble based on the minimization of entransy dissipation are different from those based on minimization of maximum temperature difference. For the same parame- ters, the constructs based on minimization of entransy dissipation and the con- structs based on minimization of maximum temperature difference are compared, and the results show that the constructs based on entransy dissipation can de- crease the mean temperature difference better than the constructs based on mini- mization of maximum temperature difference. But with the increase of the number of the order, the mean temperature difference does not always decrease, and there exist some fluctuations. Because the idea of entransy describes the heat transfer ability more suitably, all of the heat conduction constructal problems may be re-optimized based on it.WEI ShuHuan, CHEN LinGen & SUN FengRui Postgraduate School, Naval University of Engineering, Wuhan 430033, China 2008Science China(Technological Sciences)2008,51,8:47
2Constructal multidisciplinary optimization of electromagnet based on entransy dissipation minimization显示文摘Based on entransy dissipation, the mean temperature difference of solenoid (electromagnet) with high thermal conductivity material inserted is deduced, which can be taken as the fundament for heat transfer optimization using the extremum principle of entransy dissipation. Then, the electromagnet working at steady state (constant magnetic field, constant heat generating rate per unit volume) is optimized for entransy dissipation minimization (i.e. mean temperature difference minimization) with and without volume constraint. Besides, the effect of high thermal conductivity material on the magnetic field is analyzed, and the minimum mean temperature versus volume and magnetic induction characteristic are also studied.WEI ShuHuan CHEN LinGen SUN FengRui 2009Science China(Technological Sciences)2009,52,10:29
3Constructal optimization of discrete and continuous-variable cross-section conducting path based on entransy dissipation rate minimization显示文摘Using constructal entransy dissipation rate minimization method based on discrete variable cross-section conducting path,constructal optimizations of elemental area with variable cross-section conducting path are performed,and the results are compared with the optimization results of elemental area with the constant cross-section conducting path.The comparison shows that the minimum mean temperature difference based on elemental area with variable cross-section conducting path increases and approaches a constant as the assembly's order increases,but the minimum mean temperature difference based on elemental area with constant cross-section conducting path decreases and approaches a constant as the assembly's order increases.The difference between them is caused by the different dimensionless mean temperature difference of the first order assembly.A universal constructal optimization method by self similar organization to improve heat transfer ability and its corresponding rule are proposed.With the constructal optimization method by self similar organization based on entransy dissipation rate minimization objective,the mean temperature difference approaches a constant as the assembly's order increases.WEI ShuHuan,CHEN LinGen & SUN FengRui Postgraduate School,Naval University of Engineering,Wuhan 430033,China 2010Science China(Technological Sciences)2010,53,6:27
4Cold events of Holocene indicated by primary elements distribution of the high-resolution sand dunes in the Salawusu River Valley显示文摘在为在 Salawusu 河山谷的 Milanggouwan 节的 MGS1 分部的沙丘沙的主要元素的部件,与那些相比现代沙丘沙,证明他们被东方亚洲冬季季风在亩引起我们NIU Dongfeng LI Baosheng DU Shuhuan WEN Xiaohao QIU Shifan OU Xianjiao YANG Yi 2008Journal of Geographical Sciences2008,18,1:20
5Phases of Environmental Evolution Indicated by Primary Chemical Elements and Paleontological Records in the Upper Pleistocene-Holocene Series for the Salawusu River Valley,China显示文摘岩性学的研究,沉积褪色,分发整齐 ofSiO_2 和 Al_2O_3 满足并且 Al_2O_3/SiO_2 比率允许我们划分 Milanggouwan 节在中国的 Salawusu 河山谷代表进六个片断的上面的 Pleistocene-HoloceneSeries : MGS1, MGS2, MGS3, MGS4, MGS5 和 MGS6。边界为 MGS1 ( Dishaogouwan 和 DagouwanFormations )变老, MGS2 (上面的 Chengchuan 形成), MGS3 (中间的 Chengchuan 形成), MGS4 (更低的 Chengchuan 形成),分别地, MGS5 ( Salawusu 形成的大多数阶层)和 MGS6 ( Salawusu 形成的底部和 Lishi 形成的顶)从深海沉积或大陆冰川 MIS1 , MIS2 , MIS3 , MIS4 , MIS5 和 MIS6 对应于那些。MGS5 能被细分进五子段(MGS5a, MGS5b, MGS5c, MGS5d 和 MGS5e ) ,这些子段的边界年龄分别地 MIS5a, MIS5b, MIS5c, MIS5d 和 MIS5e 对应于那些。古环境和苍白的生态学由主要化学元素,石块脊椎动物,软体动物和花粉谷物显示了的 Basedon ,我们假设 MGS5 的子段匹配的那 MGS1 , MGS2 , MGS3 , MGS4 , MGS5 和 MGS6and 为在深海沉积和大陆冰川的氧同位素的相应阶段,并且潜水艇以气候的人物, MIS5 上演进一步向现象解释那决定了晚第四级的阶层的形成和 Salawusu 的古生物学这些现象在世界气候联系到变化(并且特别地在东方亚洲季风) 在冰川、间冰期的句号期间。LI Baosheng WEN Xiaohao QIU Shifan David Dian ZHANG DU Shuhuan CHEN Deniu OU Xianjiao NIU Dongfeng 2007Acta Geologica Sinica(English Edition)2007,81,4:17
6Pleniglacial millennium-scale climate variations in northern China based on records from the Salawusu River Valley显示文摘Situated in the Salawusu River Valley, southeast of China's Mu Us Desert, the MGS2 (Milanggouwan section) portion of the Milanggouwan stratigraphic section records 5.5 sedimentary cycles consisting of alternations between dune sand deposits and fluvial or lacustrine facies. We analyzed the grain-size and CaCO 3 distributions in MGS2, and found that Mz (mean particle diameter) and σ (standard deviation) displayed clear variations in peaks and valleys within different sedimentary facies. The CaCO 3 content averaged 0.4% in the dune sand deposits, 1.43% in the fluvial facies, and 8.82% in the lacustrine facies. Both the grain-size distribution and CaCO 3 contents, which equal the indicators for the alternation among the sedimentary facies, suggest the occurrence of 5.5 cycles. These results suggest that the observed cycles mainly resulted from fluctuations between a cold and dry winter monsoon climate and a warm and humid summer monsoon climate, and that the MGS2 portion experienced at least 5.5 fluctuations between these two extremes. This high-frequency climatic fluctuation indicates a strong influence of millennium-scale variations in the strength of the East Asian winter and summer monsoons in our study area during the Pleniglacial.FengNian WANG BaoSheng LI JiangLong WANG XiaoHao WEN DongFeng NIU ZhiWen LI YueJun SI YiHua GUO ShuHuan DU 2012Journal of Arid Land2012,4,3:7
7Evolution of urban black and odorous water:The characteristics of microbial community and driving-factors显示文摘Urban black blooms that are primarily caused by organic carbon are deleterious environmental problems.However,detailed studies on the microbial characteristics that form urban black blooms are lacking.In this study,we observed the composition,diversity,and function of bacterial community in the overlying water and sediments during the occurrence and remediation of urban black blooms using high-throughput 16S rRNA gene amplicon sequencing analysis.First,we found that pivotal consortia in the overlying water increased significantly during the formation of black blooms,including the genera Acidovorax,Brevundimonas,Pusillimonas,and Burkholderiales involved in the degradation of refractory organics,as well as the genera Desulfovibrio,Dechloromonas,and Rhizobium related to the production of black and odorous substances.An RDA analysis revealed that chemical oxygen demand,dissolved oxygen,and oxidation reduction potential were related to the changes in microbial community composition.Furthermore,aeration was found to accelerate the removal of ammonia nitrogen and enhance the function of microbial community by stimulating the growth of order Planktomycetes during the remediation of black blooms,but aeration substantially damaged the microbial diversity and richness.Therefore,the health of the aquatic ecosystem should be comprehensively considered when aeration is applied to restore polluted waterbodies.Notably,we observed a large number of pathogenic bacteria in urban black blooms,which emphasizes the importance of treating domestic sewage so that it is harmless.Together,these findings provide new insights and a basis to prevent and manage urban black blooms.Dan Zhang Huilan Yang Shuhuan Lan Chen Wang Xudong Li Yunxiao Xing Hua Yue Qiulin Li Ling Wang Yifei Xie 2022Journal of Environmental Sciences2022,34,2:4
8Paleoclimate change recorded in the red earth and brown-yellow sediment of Late Quaternary for northeastern part of Guangdong Province,south to the Nanling Mountains,China显示文摘The paleoenvironment indicated by the geochronology,major oxides——SiO2,Al2O3 and TOFE(Fe2O3 + FeO),and CIA(Chemical Index of Alteration) value of the red earth and brown-yellow silt primarily characterized by the Linjiang stratigraphic section,based on the geological investigation of Late Quaternary along the river banks of northeastern part of China's Guangdong Province,south to the Nanling Mountains,allow us to hypothesize that the red earth on the first terrace in northeastern part of Guangdong belongs to reticulated red clay developed in a hot-wet environment of the last interglacial period(132―73 ka BP),similar to the monsoon environment in the northern margin of modern tropical zone,while the overlying brown-yellow silt layer mainly accumulated in a monsoon environment of warm temperate zone in the last glacial period(73―11 ka BP),with the aeolian sand LJ3 representing an extreme period of worsening climate.Such a hypothesis corresponds well with predecessors' research on the paleoenvironment indicated by abundant fossils in both south and east to the Nanling Mountains.Hence,it follows that the bioclimatic zone did experience a large and rapid vicissitude in northeastern part of China's Guangdong Province,and even in the full extent of the region south to the Nanling Mountains from the last interglacial period to the last glacial period,with the red earth being replaced by the brown-yellow silty sediment,and even maybe with the Ailuropoda-Stegodon Fauna being replaced by the Penghu Fauna.This study may provide an important geological demonstration for the environmental response to global change in China's low latitudes on a 10 ka scale.LI BaoSheng WEN XiaoHaoi DAVID DianZhang QIU ShiFan DONG YOXiang LI ZhiWen DU ShuHuan OU XianJiao LI HouXin NIU DongFeng YANG Yi 2008Chinese Science Bulletin2008,53,24:4
9Impact of Different Diets on Adult Tri-Spine Horseshoe Crab,Tachypleus tridentatus显示文摘Effective culture and management of adult tri-spine horseshoe crab,Tachypleus tridentatus can ensure that stock enhancement programs and aquaculture systems are maintained.To explore suitable feed for animals during the breeding season,Pacific oyster(Ostrea gigas)(oyster group;OG)and frozen sharpbelly fish(Hemiculter leucisculus)(frozen fish group;FG)were selected to feed 20 T.tridentatus male and female pairs,respectively.At the end of the experiment,intestinal samples were obtained to measure digestive enzymes activities.The intestinal flora were determined by 16S r DNA sequencing.No eggs were observed in the FG and one T.tridentatus adult died.No animals died in the OG,and 9.7×10;eggs were obtained.These results show that oysters are more suitable for the development and reproduction of adult T.tridentatus than frozen fish.Additionally,the digestive enzyme activity analysis revealed that animals in the OG exhibited higher protein digestibility than those in the FG,but no significant differences in lipid and carbohydrate uptake were observed between the groups.Furthermore,the intestinal flora analysis showed that operational taxonomic units(OTUs)and the Chao1 index were significantly higher in the OG than in the FG,but no significant difference was observed in the Shannon or Simpson indices between the groups.Our data indicate that the oyster diet improved the intestinal microbial diversity of T.tridentatus.We hypothesize that nutrients,such as oyster-based taurine,proteins,and highly unsaturated fatty acids,improve protease activity in the T.tridentatus digestive tract,alter the intestinal floral structure,and improve the reproductive performance of T.tridentatus.YING Ziwei BAO Yuyuan LI Yinkang YE Guoling ZHANG Shuhuan XU Peng ZHU Junhua XIE Xiaoyong 2022Journal of Ocean University of China2022,21,3:3
10Parameters measurement for the thermal neutron beam in the thermal column hole of Xi'an pulse reactor显示文摘The distribution of the neutron spectra in the thermal column hole of Xi'an pulse reactor was measured with the time-of-flight method.Compared with the thermal Maxwellian theory neutron spectra,the thermal neutron spectra measured is a little softer,and the average neutron energy of the experimental spectra is about 0.042±0.01 eV.The thermal neutron fluence rate at the front end of thermal column hole,measured with gold foil activation techniques,is about 1.18×105 cm-2 s-1.The standard uncertainty of the measured thermal neutron fluence is about 3%.The spectra-averaged cross section of 197Au(n,γ) determined by the experimental thermal neutron spectra is(92.8±0.93) ×10-24 cm2.ShuHuan Liu XinBiao Jiang YunHong Zhong QingYu Yu WenShou Zhang Kai Wang Jun Yang YingLin Wang 2010Science China(Technological Sciences)2010,53,5:2
11Kinetics of Carbide Layer Forming on the Surface of Steel in Molten Systems显示文摘A mathematical model of kinetics of carbide layer formed on the surface of steel in fused system was set up with the theory of non-stable diffusion mass transfer and regular solution sub-lattice. This model was analyzed and testified by the experiments in which the VC layers were formed on four kinds of steels as steel 45,4Cr5MoSiV1,T10, and Cr12MoV immersed in the V2O5-Na2O-B2O5 fused system with the reducing agent of silicon.The results showed that there was a good agreement between the model and the experimental results;the growth speed of carbide layer depended on the factors of carbon activity in substrate, treatment temperature,kinds of carbides and its structure etc.Shuhuan Wang Shengwen Wu Shantong Jin Metallurgy School, UST Beijing, Beijing 100083, China 1998International Journal of Minerals,Metallurgy and Materials1998,12,2:2
12Monotone iterative method for first-order functional difference equations with nonlinear boundary value conditions显示文摘Peiguang Wang Shuhuan Tian and Yonghong Wu 2008Applied Mathematics and Computation2008,,203:1
13The effect of time to nitrogen solubility in steel with high pressure and bottom blowing nitrogen显示文摘Gao Ai Min Fang Xinkuo Wang Shuhuan 0,,:1
14Determining Factors for High Performance Silicone Rubber Microwave Absorbing Materials显示文摘Zou Hua Li Shuhuan Zhang Liqun 2011Journal of Magnetism and Magnetic Materials2011,,323:1
15Age of the MGS5 segment of the Milanggouwan stratigraphical section and evolution of the desert environment on a kiloyear scale during the Last Interglacial in China's Salawusu River Valley: Evidence from Rb and Sr contents and ratios显示文摘Du Shuhuan Li Baosheng Niu Dongfeng 2011Chemie der Erde-Geochemistry2011,71,1:1
16Efficacy evaluate of pegylated interferon a-2a treatment for HBeAg-positive chronic hepatitis B 显示文摘LI Zhiqin SUN Changyu W'U Shuhuan 2010Journal of Medical Forum2010,31,2:1
17Grain-size distribution characteristics of red sandy sediments in Dongjiang River valley,southern Nanling Mountains,during the MIS2 stage显示文摘Layer LJ3 of Linjiang stratigraphic section in Dongjiang River valley in the south of the Nanling Mountains is a set of red sandy sediments.Measured by thermoluminescence(TL) dating,it was found to be formed in MIS2-9,500 ± 800 yr to 19,600 ± 1,800 yr B.P.After analy-sis of the grain sizes of the 16 samples(LJ3-100 to LJ3-85) in this layer,it was discovered that(1) The contents of each grain group in dif-ferent samples are similar.(2) The values of Md,Mz,,Sk,and Kg vary from LJ3-100 to LJ3-85 in a narrow range.(3) The segments of each sample in the accumulative curves extend parallel with similar slopes.All the three aspects reveal the Aeolian characteristics of Layer LJ3.Therefore,it is thought that Layer LJ3 consists of red sandy sediments formed in MIS2 in the south of Nanling Mountain,which reflects the arid climate at that time.ShuHuan Du 1,BaoSheng Li 1,2,DongFeng Niu 1,XiaoHao Wen 1,FengNian Wang 1,XianJiao Ou 1,Yi Yang 1,YueJun Si 1,XinNan Zhao 1 1.Department of Geography,South China Normal University,Guangzhou,Guangdong 510631,China 2.State Key Laboratory of Loess and Quaternary Geology,Institute of Earth Environment,Chinese Academy of Sciences,Xi’an,Shaanxi 710061,China 2009Research in Cold and Arid Regions2009,1,5:1
18Chlorotoxin-modified macromolecular contrast agent for MRI tumor diagnosis显示文摘Rongqin Huang Liang Han Jianfeng Li Shuhuan Liu Kun Shao Yuyang Kuang Xing Hu Xuxia Wang Hao Lei Chen Jiang 2011Biomaterials2011,,22:1
19CMOS analog MAP decoder for (8, 4) Hamming code 显示文摘Winstead C Jie Dai Yu Shuhuan 2004IEEE Journal of Solid-State Circuits2004,39,1:1
20Targeted delivery of chlorotoxin-modified DNA-loaded nanoparticles to glioma via intravenous administration显示文摘Rongqin Huang Weilun Ke Liang Han Jianfeng Li Shuhuan Liu Chen Jiang 2010Biomaterials2010,,9:1
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