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| 1 | Simulation of Morphological Development of Soil Cracks in Yuanmou Dry-hot Valley Region, Southwest China显示文摘Soil cracking is an important process influencing water and solutes transport in the Yuanmou Dry-hot Valley region of Southwest China. Studying the morphological development of soil cracks helps to further reveal the close relationship between the soil cracking process and water movement in such semi-arid regions. Here we report regular changes on surface morphology of soil cracks with decreasing water in four different soils (Typ-Ustic Ferrisols,Ver-Ustic Ferrisols,Tru-Ustic Vertisols and Typ-Ustic Vertisols) through simulation experiments. Our results indicate the following: 1) Different soils ultimately have different development degrees of soil cracks,according to their various values of crack area density. Soil cracks in Typ-Ustic Ferrisols can only develop to the feeble degree,while those in the other three soils are capable of developing into the intensive degree,and even into the extremely intensive degree. 2) Soil crack complexity,as expressed by the value of the area-weighted mean of crack fractal dimension (AWMFRAC),is found to continuously decrease as a whole through the whole cracking process in all the studied soils. 3) Soil crack connectivity shows a uniform trend in the studied soils,that is to say,connectivity gradually increases with soil crack development. | XIONG Donghong YAN Dongchun LONG Yi LU Xiaoning HAN Jianning HAN Xueqin SHI Liangtao | 2010 | Chinese Geographical Science2010，20，2： | 8 |
| 2 | Surface Morphology of Soil Cracks in Yuanmou Dry-hot Valley Region,Southwest China显示文摘Surface morphology of soil cracks is one of the important factors influencing the water evaporation rate in cracked soil in Yuanmou Dry-hot Valley Region,Southwest China. Quantitative study of the complicated surface morphology of soil cracks is a prerequisite for further studies of soil-cracking mechanisms. The present paper establishes a quantitative indicator system by application of concepts and methods originating from Fractal Geometry and Network Analysis. These indicators can effectively express the complicated features of soil-crack network structure. Furthermore,a series of values related to soil-crack morphology was obtained by image processing on field photos of soil-crack quads,and gradation criteria for the degree of development of soil cracks were determined. Finally,the changes in values of the morphological indicators under different degrees of development were analyzed in detail. Our results indicate that (1) the degree of development of soil cracks can be divided into five grades,i.e.,feeble development,slight development,medium development,intensive development and extremely intensive development; (2) the values of the indicators change predictably with increasing degree of development of soil cracks. The area density (Dc) increases,and both the area-weighted mean ratio of crack area to perimeter (AWMARP),which reflects the intensity of cracking,and the index r,which is related to the connectivity of a soil crack,grow uniformly (albeit with different forms). AWMRAP increases at a geometric rate while r shows logarithm-mic growth,indicating a gradual increase in theconnectivity of a soil crack. Nevertheless,the area-weighted mean of soil-crack fractal dimension (AWMFRAC) shows a decreasing trend,indicating a gradual decline in the complexity of cracks as area density increases. | XIONG Donghong LONG Yi YAN Dongchun LU Xiaoning JI Zhonghua FANG Haidong | 2009 | Journal of Mountain Science2009，6，4： | 7 |
| 3 | Improved dissolution and oral absorption by co-grinding active drug probucol and ternary stabilizers mixtures with planetary beads-milling method显示文摘The objective of this work is to construct a nanosuspension drug delivery system of probucol,a BCS II drug,in order to improve its dissolution and oral bioavailability.The wet milling procedure using planetary beads-milling equipment was utilized to grind the raw probucol to ultrafine nanoparticle/nanocrystal aqueous suspension that was further solidified by freeze-drying process.Cellulose derivatives of different substitution groups and molecular weights,including HPMC,HPC,and MC,were evaluated as the primary stabilizer of probucol nanosuspension.Ternary stabilizers system composed of a primary stabilizer(cellulose derivative,i.e.HPC),a nonionic surfactant(Pluronic R F68),and an anionic surfactant(SDS)was employed to obtain probucol nanosuspension of finer particle size and enhanced dissolution in aqueous media.The probucol nanosuspension with good physical stability showed no obvious change of particle size even after storing over 7 d at 4°C or 25°C.The solidified probucol nanosuspension with trehalose as the cryoprotectant showed the highest dissolution rate(>60%at 2 h)compared to other cryoprotectant.The in vivo pharmacokinetic evaluation indicated about 15-folds higher AUC value of the probucol nanosuspension compared to that of coarse probucol suspension after oral administration to rats.The probucol nanosuspension prepared by wet-milling and ternary stabilizers system may find wide applications for improving the dissolution and oral absorption of water-insoluble drugs. | Fang Li Linsen Li Shaoning Wang Yan Yang Jia Li Dongchun Liu Sijie Zhang Siling Wang Hui Xu | 2019 | Asian Journal of Pharmaceutical Sciences2019，14，6： | 5 |
| 4 | Approach to Delimiting Metropolitan Regions' Boundary and Grading Urban Hierarchy Within a Metropolitan Region——A Case Study of Shanghai Metropolitan Region显示文摘In metropolitan regions, the change in the strength of 'flows' between a core city and surrounding cities re-flects the range of the core city's influence, while the gravity between core city and other cities reflects the strength of potential relation between them. This article firstly attempts to delimit the boundary of metropolitan regions with the two dimensions measure combining 'flows' and gravitation. The former is measured through the flow of people be-tween the core city and surrounding cities, and the latter is measured through both population and gross domestic products (GDP) of the core city and surrounding cities. The hierarchy of the cities within a metropolitan region is classified in order to emphasize the roles of the cities belonging to the metropolitan regions, different from the general way through population scale and administrative level, and is typical in China. This paper uses the Shanghai metropolitan region as a research case, determining boundary of this metropolitan region clearly and classifying hierarchy of the cities within the region. The final results are significantly different to previous work, even overthrowing the traditional system of urban hierarchy partly. It is helpful to highlight the function of cities in organizing the regional economy, the level structure of metropolitan regions, and each city's relative importance in a metropolitan region, which can be taken as scientific basis for planning integrated regions or urban systems. | LUO Shougui Andrew JOHNSTON CHEN Dongchun | 2008 | Chinese Geographical Science2008，18，3： | 5 |
| 5 | APPLICATION OF GEOGRAPHICAL PARAMETER DATABASE TO ESTABLISHMENT OF UNIT POPULATION DATABASE显示文摘Now GIS is turning into a good tool in handling geographical, economical, and population data, so we can obtain more and more information from these data. On the other hand, in some cases, for a calamity, such as hurricane, earthquake, flood, drought etc., or a decision-making, such as setting up a broadcasting transmitter, building a chemical plant etc., we have to evaluate the total population in the region influenced by a calamity or a project. In this paper, a method is put forward to evaluate the population in such special region. Through exploring the correlation of geographical parameters and the distribution of people in the same region by means of quantitative analysis and qualitative analysis, unit population database (1km× 1km) is established. In this way, estimating the number of people in a special region is capable by adding up the population in every grid involved in this region boundary. The geographical parameters are obtained from topographic database and DEM database on the scale of 1∶ 250 000. The fundamental geographical parameter database covering county administrative boundaries and 1km× 1km grid is set up and the population database at county level is set up as well. Both geographical parameter database and unit population database are able to offer sufficient conditions for quantitative analysis. They will have important role in the research fields of data mining (DM), Decision-making Support Systems (DSS), and regional sustainable development. | WUXi-zhi DONGChun ZHAORong LIUJi-ping WANGGui-xin | 2003 | Chinese Geographical Science2003，13，1： | 4 |
| 6 | Interspecific Hybridization Between Crassostrea angulata and C. ariakensis显示文摘Interspecific hybridization can generate heterosis, which is proven to be a useful tool in selective breeding programs for oyster culture. Crassostrea angulata and C. ariakensis are two important economic shellfish species in China. We conducted 2 × 2 reciprocal crosses to determine whether these two species can cross-fertilize and their hybrids can hatch, survive and perform heterosis. Fertilization was found symmetrical without delay. The rate of fertilization success of C. angulata ♀× C. ariakensis ♂ was lower than that of C. ariakensis ♀× C. angulata ♂, and the success rate of both hybridizations was lower than that of two intraspecific crosses each. During the planktonic period, survival rate of the progeny was lower in the hybrid crosses than in the intraspecific crosses. On day 360, mean shell height of the progeny of C. angulata ♀× C. angulata ♂ was highest, which was followed by that of C. angulata ♀× C. ariakensis ♂, C. ariakensis ♀× C. ariakensis ♂ and C. ariakensis ♀× C. angulata ♂ in a descending order. Morphology of adults produced by the hybrid crosses was similar to that of C. angulata. Both hybrids underwent normal gonad development and produced mature gametes in the mating season. This study provided new insights into the quantitative traits in interspecific crosses of Crassostrea species, thus being of guidance value for selective breeding of oyster. | YAO Tuo ZHANG Yuehuan YAN Xiwu WANG Zhaoping LI Dongchun SU Jiaqi YU Ruihai | 2015 | Journal of Ocean University of China2015，14，4： | 2 |
| 7 | Biocorrosion study on zirconium-based bulk-metallic glasses显示文摘 | Huang Lu Qiao Dongchun Brandice A Green | 2009 | Intermetallies2009，17，4： | 1 |
| 8 | Development and evaluation of a VP3-ELISA for the detection of goose and Muscovy duck parvovirus antibodies显示文摘 | Yun Zhang Yongfeng Li Ming Liu Dabing Zhang Dongchun Guo Chunguo Liu Haidong Zhi Xiaomei Wang Gang Li Na Li Shiguo Liu Wenhua Xiang Guangzhi Tong | 2009 | Journal of Virological Methods2009，，2： | 1 |
| 9 | Experimental Observation of Cubic C_3N_4 Compound in Carbon Nitride Thin Films显示文摘Cubic C3N4 compound in the C-N thin films on Si and NaCl substrates was prepared by ion beam sputtering of a pure graphite target with discharge gas of pure N2. X-ray photoelectron spectroscopy indicated that nitrogen atoms combined with sp2- and sp3- coordinated C atoms in the film, respectively. X-ray diffraction, selected area electron diffraction and high-resolution electron microscopy were used to identify the cubic C3N4 phase. The results reconfirm the ab initio calculations on metastable structure in C-N | Furen XIAO Dongli YU Yongjun TIAN Julong HE Dongchun LI and Wenkui WANG(College of Materials Science and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China To whom correspondence should be addressed E-mail: fhcl@ysu.edu.cn ) | 1999 | Journal of Materials Science & Technology1999，15，5： | 1 |
| 10 | Study of the Float Glass Melting Process: Combining Fluid Dynamics Simulation and Glass Homogeneity Inspection显示文摘 | Feng Zhijun Li Dongchun Qin Guoqiang | 2008 | J Am Ceram Soc2008，91，10： | 1 |
| 11 | A New Method to Optimize Furnace Designs Using Daily Flow Rates to Maximizing Energy Savings in the Steady Produetion显示文摘 | Feng Zhijun Li Dongchun Qin Guoqiang | 2009 | J Am Ceram Soc2009，92，10： | 1 |
| 12 | Effect of the Flow Pattern in a Float Glass Furnace on Glass Quality: Calcula tions and Experimental Evaluation of On-Site Samples显示文摘 | Feng Zhijun Li Dongchun Qin Guoqiang | 2009 | J Am Ceram Soc2009，92，12： | 1 |
| 13 | Virus-phytoplankton adhesion:a new WSSV transmission route to zooplankton显示文摘The pathogenicity of white spot syndrome virus(WSSV)to zooplankton species,rotifer Brachionus urceus(Linnaeus),copepod Acartia clausi(Giesbrecht)and mysid shrimp Neomysis awatschensis(Brandt),was estimated by immersion challenge and virus-phytoplankton adhesion route to investigate a potential new transmission route of WSSV to zooplankton.WSSV succeeded in infecting these zooplankton species and nested-PCR revealed positive results for the virus-phytoplankton adhesion route,whereas WSSV cannot infect zooplankton by immersion challenge.These results indicated that virus-phytoplankton adhesion route is a successful new transmission route of WSSV to zooplankton and also implied that phytoplankton could be a carrier in WSSV transmission. | ZHANG Jiasong DONG Shuanglin TIAN Xiangli DONG Yunwei LIU Xiangyi YAN Dongchun | 2007 | Acta Oceanologica Sinica2007，26，6： | 1 |
| 14 | Effects of di-(2-ethylhexyl) phthalate on the hypothalamus-pituitary-ovarian axis in adult female rats显示文摘 | Te Liu Na Li Jian Zhu Guangyan Yu Kun Guo Liting Zhou Dongchun Zheng Xiaofeng Qu Jian Huang Xin Chen Shuyue Wang Lin Ye | 2014 | Reproductive Toxicology2014，，： | 1 |
| 15 | Effect of iodine supplement on iodine status and 5′-deiodinase activity in the brain of neonatal rats with iodine deficiency显示文摘 | Nianqing Liu Aijun Zuo Dongchun Liang Zhiyong Zhang Gang Guo Zhifang Chai | 2006 | Biological Trace Element Research (-)2006，，1： | 1 |
| 16 | Chlorination by-products in surface water treatment process显示文摘 | Junsung Kim Yong Chung Dongchun Shin Myungsoo Kim Yonghun Lee Youngwook Lim Duckhee Lee | 2002 | Desalination2002，，1： | 1 |
| 17 | METHOD TO IMPROVE DYNAMIC TRACKING ABILITY OF SPOT WELDING MANIPULATOR WITH HEAVY PAYLOAD显示文摘To improve the dynamic tracking ability of spot welding manipulator with heavy payload, a new programmable motion controller, which can provide software and hardware supports for several kinds of control algorithms, is developed first. Then, a decentralized adaptive control algorithm is used to compensate the coupling between the manipulator joints, and the algorithm is easy to implement based on the motion controller. Finally, experiments demonstrate that, compared with the traditional PID, the dynamic tracking ability of the manipulator can be obviously improved with this algorithm. | DongChun XuWenli YangGeng FuLixin | 2004 | Chinese Journal of Mechanical Engineering2004，17，3： | 1 |
| 18 | A Preliminary Study on Traditional Level-trench Method to Prevent Rill Initiation in the Three Gorges Region,China显示文摘The level-trench method is a traditional tillage operation to develop a drainage system on slope land in the Three Gorges region.Before crops are planted,farmers prepare the land with level trenches spaced 3-10 m apart,depending on the slope gradient:steeper slopes require shorter distances.Little scientific analysis has been done on the use of traditional level trenches for soil conservation.We conducted a field investigation and simulation experiments,and present a comparison between the spacing of level trenches and the slope length required for rill initiation.The results indicate that the spacing of level trenches in farmland is close to the slope length required for rill initiation in the experimental plots,and regression models of trench spacing with the gradient and the slope length required for rill initiation with the gradient have similar formats;the coefficients of determination (R2) for the two equations are 0.99 and 0.88,respectively.There were some differences between the field survey and experiments,but we conclude that the traditional level-trench method has an important role in preventing rill initiation. | YAN Dongchun WEN Anbang HE Xiubin SHI Zhonglin XIONG Donghong LONG Yi | 2011 | Journal of Mountain Science2011，8，6： | 1 |
| 19 | Multi-domain abdomen image alignment based on multi-scale diffeomorphic jointed network显示文摘Recently, the generative adversarial network(GAN) has been extensively applied to the cross-modality conversion of medical images and has shown outstanding performance than other image conversion algorithms. Hence, we propose a novel GAN-based multi-domain registration method named multiscale diffeomorphic jointed network of registration and synthesis(MDJRS-Net). The deviation of the generator of the GAN-based approach affects the alignment phase, so a joint training strategy is introduced to improve the performance of the generator, which feedbacks the structural loss contained in the deformation field. Meanwhile, the nature of diffeomorphism can enable the network to generate deformation fields with more anatomical properties. The average dice score(Dice) is improved by 1.95% for the computer tomography venous(CTV) to magnetic resonance imaging(MRI) registration task and by 1.92% for the CTV to computer tomography plain(CTP) task compared with the other methods. | LU Zhengwei WANG Yong GUAN Qiu CHEN Yizhou LIU Dongchun XU Xinli | 2022 | Optoelectronics Letters2022，18，10： | 0 |
| 20 | Mechanical unfolding of a β-barrel membrane protein by single-molecule force spectroscopy显示文摘Dear Editor.Transmembrane proteins with β-barrel topology are mainly found in the outer membranes(OMs)of Gram-negative bacteria,mitochondria and chloroplasts(Wimley,2003).These proteins usually contain even numbers of β-strands,ranging from 8-36.To achieve an overall cylindrical topology,the polypeptide chain of a β-barrel OMP must fold to form a series of anti-parallel β-strands with each β-strand hydrogen-bonding to its neighboring strands(Otzen and Andersen,2013).The folding and insertion of a β-barrel OMP in vivo requires an evolutionarily conserved multiprotein complex termedβ-barrel assembly machinery(BAM)complex(Noinaj et al.,2015). | Hui Chen Guangtao Song Yong Zhang Dongchun Ni Xinwei Zhang Yihua Huang Jizhong Lou | 2021 | Science China(Life Sciences)2021，64，2： | 0 |
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