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| 1 | The variation in soil moisture and the appropriate groundwater table for desert riparian forest along the Lower Tarim River显示文摘基于在五年监视更低的 Tarim 河收集的数据,我们由使用变化(Cv ) 的系数的方法分析了土壤潮湿内容(SMC ) 和在 SMC,地下水表格深度(GWD ) 和植被之间的关系的可变性,皮尔森关联和回归。SMC 的可变性的结果显示它随 060 厘米的土壤层的土壤层 SMC 的深度的增加升起了与在在可变性显示出重要增加的 100260 厘米的土壤层的 SMC 相比是相对小的。SMC 和 GWD 在生态的水消遣在 Yingsu 横断和它水路的附近的地点展出了重要差别前后,特别在 100260 厘米的土壤层的 SMC 与 GWD 的重要上升显著地增加了并且在大约 4 m 的 GWD 到达了最大的价值。显著地随 100260 厘米的土壤层的 SMC 的增加改进的植物范围和种类差异,他们俩接近了最大的价值,当 SMC 是时, 92.3% 主要植物种类能成长 >10% 。沿着更低的 Tarim 河恢复荒芜的河边的森林的生态系统, GWD 必须被维持在 < 在水路并且在为这个干旱区域的其余部分的大约 4 m 的附近的 4 m。 | MA Xiaodong CHEN Yaning ZHU Chenggang LI Weihong | 2011 | Journal of Geographical Sciences2011，21，1： | 23 |
| 2 | IL-17 response mediates acute lung injury induced by the 2009 Pandemic Influenza A (HIN1) Virus显示文摘 | Chenggang Li Penghui Yang Yang Sun Taisheng Li Chen Wang Zhong Wang Zhen Zou Yiwu Yan Wei Wang Chen Wang Zhongwei Chen Li Xing Chong Tang Xiangwu Ju Feng Guo Jiejie Deng Yan Zhao Peng Yang Jun Tang Huanling Wang Zhongpeng Zhao Zhinan Yin Bin Cao Xiliang Wang Chengyu Jiang | 2012 | Cell Research2012，22，3： | 22 |
| 3 | Volume change behavior of unsaturated soils under non-isothermal conditions显示文摘With the development of modern geotechnical engineering practices such as the construction of high level radioactive waste repositories, exploitation and utilization of geothermal resources, energy-saving buildings and underground storage of CO 2 , research into the influence of temperature on the basic mechanical properties of unsaturated soils has become an important issue internationally. By using the work expression and considering the influence of temperature on the basic properties of unsaturated soils, the average soil skeleton stress, modified suction and temperature were selected as state variables of generalized forces in thermodynamics and the soil skeleton strain, saturation and entropy were chosen as state variables of generalized flows conjugate to the variables of generalized forces. Based on the nonlinear multi-field coupled model and by using existing experimental results, an elastic-plastic constitutive model of unsaturated soils under non-isothermal conditions was developed to analyze the influence of temperature on the deformation properties of unsaturated soils. The model was used to predict and analyze the influence of suction and temperature on the deformation properties of unsaturated soils under isotropic conditions, and was successfully verified using experimental results. | CAI GuoQing ZHAO ChengGang LIU Yan LI Jian | 2011 | Chinese Science Bulletin2011，56，23： | 16 |
| 4 | A nonlinear multi-field coupled model for soils显示文摘A nonlinear multi-field coupled model for multi-constituent three-phase soils is derived by using the hybrid mixture theory. The balance equations with three levels (constituents, phases and the whole mixture soil) are set up under the assumption that soil is composed of multi-constituent elastic-plastic solid skeleton (which is different from the linearization method) and viscous liquid and ideal gas. With reasonable constitutive assumptions in such restrictive conditions as the principles of determinism, equipresence, material frame-indifference and the compatible principle in continuum mechanics, a theoretical framework of constitutive relations modeling three-phase soil in both non-equilibrium and equilibrium states is established, thus the closed field equations are formed. In the theoretical framework, the concept of effective generalized thermodynamic forces is introduced, and the nonlinear coupling constitutive relations between generalized dissipation forces and generalized flows within the system at nonequilibrium state are also presented. On such a basis, four special coupling relations, i.e., solid thermal elastic-plastic constitutive relation, liquid visco-elastic-plastic constitutive relation, the generalized Fourier’s law, and the generalized Darcy’s law are put forward. The generalized or nonlinear results mentioned above can degenerate into the linear coupling results given by Bennethum and Singh. Based on a specific dissipation function, the concrete form of generalized Darcy’s law is deduced, which may degenerate into the traditional form of Darcy’s law by neglecting the influence of skeleton deformation and temperature. Without considering temperature and other coupling effects, the nonlinear coupled model in this paper can degenerate into a soil elastic-plastic constitutive model. | CAI GuoQing ZHAO ChengGang LIU Yan LI Jian | 2011 | Science China(Technological Sciences)2011，54，5： | 15 |
| 5 | Effect of methamidophos on soil fungi community in microcosms by plate count,DGGE and clone library analysis显示文摘Methamidophos 广泛地被使用在北中国的杀虫剂。在黑色的真菌的社区玷污的土壤上的 methamidophos 的潜在的影响被板计数, 28S rDNA-PCR-DGGE,和克隆图书馆分析估计。三个 methamidophos 层次(50,150,和 250 mg/kg ) 在土壤缩影被测试。从板计数的结果在一个 60-d 缩影实验期间证明 methamidophos ( 250 mg/kg )的高集中能显著地刺激采指纹显示出的模式的真菌的 populations.DGGE (使中毒的坡度胶化电气泳动)在 methamidophos.Shannon 差异索引的压力下面的 culturable 和全部的真菌社区的回答之间的重要差别从 DGGE 计算了侧面显示在有 methamidophos 处理的所有缩影的 culturable 真菌在 1 星期孵化以后增加了。然而,全部的真菌的差异索引在第一个星期内减少了,作为与 culturable 真菌的刺激相比。然而,在第 8 星期, methamidophos 对待的所有缩影类似于在由香农建议差异为 culturable 和总数索引真菌的社区结构的控制缩影。相反,在 1 个星期以后, culturable 和 unculturable 的真菌的结构被聚类分析两个都在 methamidophos 的压力下面扰乱到不同程度。克隆定序分析显示了刺激病原并且 unculturable 由 methamidophos 处理的真菌的人口,植物病爆发的 suggetsing 潜力风险。 | LI Xinyu ZHANG Huiwen WU Minna ZHANG Yan ZHANG Chenggang | 2008 | Journal of Environmental Sciences2008，20，5： | 11 |
| 6 | The input work expression and the thermodynamics-based modelling framework for unsaturated expansive soils with double porosity显示文摘In this paper, based on the porous media theory, the specific expressions of the total stress and the input work of unsaturated expansive soils with double porosity are proposed, and then the energy-conjugate variables are further derived. We make distinctions between the effects of capillary water and adsorbed water on the soil behaviour, as well as between the deformations of microand macrostructure. According to the derived input work expression and the work-energy-dissipation relations for an open multiphase thermodynamic system, we establish a thermodynamics-based modelling framework for unsaturated expansive soils with double porosity. | LI Jian ZHAO ChengGang CAI GuoQing ASREAZAD Saman XU Xi Frank HUANG QiDi | 2013 | Chinese Science Bulletin2013，58，27： | 10 |
| 7 | Isolation and characterization of Sporobolomyces sp. LF1 capable of degrading chlorimuron-ethyl显示文摘A yeast strain which was capable of degrading sulfonylurea herbicide chlorimuron-ethyl named as LF1 was isolated from a chlorimuron-ethyl contaminated soil near the warehouse of the factory producing chlorimuron-ethyl in Shenyang City,Northeast China. The strain was identified as Sporobolomyces sp.,based on its morphological and physiological characteristics and the phylogenetic analysis of 18S rRNA gene sequence.So far,this is the only yeast strain of Sporobolomyces sp.which is able to degrade chlorimuron-ethyl.Incubation tests showed that when the initial concentration of chlorimuron-ethyl in culture was 5 mg/L,LF1 could degrade more than 77%of the herbicide after incubation for 4 d at 30°C.The possible mechanism of chlorimuron-ethyl degradation by LF1 could be the acidic hydrolysis caused by the acids from the metabolism of the yeast strain.Further study should be conducted to examine the pathways of chlorimuron-ethyl degradation by LF1 and to approach the feasibility of using LF1 to degrade the chlorimuron-ethyl in soil system. | ZHANG Xiaoli ZHANG Huiwen LI Xu SU Zhencheng WANG Jingjing ZHANG Chenggang | 2009 | Journal of Environmental Sciences2009，21，9： | 10 |
| 8 | Estimation of net primary productivity and its driving factors in the Ili River Valley,China显示文摘Net primary productivity(NPP), as an important variable and ecological indicator in grassland ecosystems, can reflect environmental change and the carbon budget level. The Ili River Valley is a wetland nestled in the hinterland of the Eurasian continent, which responds sensitively to the global climate change. Understanding carbon budget and their responses to climate change in the ecosystem of Ili River Valley has a significant effect on the adaptability of future climate change and sustainable development. In this study, we calculated the NPP and analyzed its spatio-temporal pattern of the Ili River Valley during the period 2000–2014 using the normalized difference vegetation index(NDVI) and an improved Carnegie-Ames-Stanford(CASA) model. Results indicate that validation showed a good performance of CASA over the study region, with an overall coefficient of determination(R2) of 0.65 and root mean square error(RMSE) of 20.86 g C/(m^2·a). Temporally, annual NPP of the Ili River Valley was 599.19 g C/(m^2·a) and showed a decreasing trend from 2000 to 2014, with an annual decrease rate of –3.51 g C/(m^2·a). However, the spatial variation was not consistent, in which 55.69% of the areas showed a decreasing tendency, 12.60% of the areas remained relatively stable and 31.71% appeared an increasing tendency. In addition, the decreasing trends in NPP were not continuous throughout the 15-year period, which was likely being caused by a shift in climate conditions. Precipitation was found to be the dominant climatic factor that controlled the inter-annual variability in NPP. Furthermore, the correlations between NPP and climate factors differed along the vertical zonal. In the medium-high altitudes of the Ili River Valley, the NPP was positively correlated to precipitation and negatively correlated to temperature and net radiation. In the low-altitude valley and high-altitude mountain areas, the NPP showed a negative correlation with precipitation and a weakly positive correlation with temperature and net radiation. The results suggested that the vegetation of the Ili River Valley degraded in recent years, and there was a more complex mechanism of local hydrothermal redistribution that controlled the growth of vegetation in this valley ecosystem. | JIAO Wei CHEN Yaning LI Weihong ZHU Chenggang LI Zhi | 2018 | Journal of Arid Land2018，10，5： | 9 |
| 9 | Research progress of gut flora in improving human wellness显示文摘Human wellness is the ultimate goal of our efforts in improving the human life.Special foods are undoubtedly important in achieving human wellness.However,overeating significantly leads to obesity and diabetes.These chronic diseases will in turn affect the human wellness.Therefore,“dietary restriction and proper exercise”were introduced in the human daily life.Different foods cause various effects on the human health.The diversification of diet is a priority for nutritionists to keep our body healthy.To avoid diabetes mellitus,special foods for ketogenic diet,low-carbon diet,and low-calorie intake are also gradually attracting attention.In addition,the hypothesis that“hunger sensation comes from gut flora”brings new light to the research on the biological motivation for humans to eat food.This hypothesis has been gradually demonstrated using the flexible fasting technology by providing special foods,such as plant polysaccharides and dietary fibers.The response to food-needing signals from the gut flora to these foods demonstrates the importance of the gut flora in improving human wellness.The gut flora is probably an essential factor for translating the food-eating signals and converting the nutrition to our body.Therefore,“gut flora priority principle”is developed to guarantee human wellness.The 16S rRNA sequencing and mass spectrometric techniques can be used to identify the gut flora,which may guide us to a new era of human wellness based on gut flora wellness. | Chenggang Zhang Wenjing Gong Zhihui Li Dawen Gao Yan Gao | 2019 | Food Science and Human Wellness2019，8，2： | 8 |
| 10 | Impact of acetochlor on ammonia-oxidizing bacteria in microcosm soils显示文摘Acetochlor is an increasingly used herbicide on corn in North China. Currently, the effect of acetochlor on soil ammonia-oxidizing bacteria (AOB) communities is not well documented. Here, we studied the diversity and community composition of AOB in soil amended with three concentrations of acetochlor (50, 150, 250 mg/kg) and the control (0 mg acetochlor/kg soil) in a microcosm experiment by PCR-DGGE (polymerase chain reaction-denaturing gradient gel electrophoresis) and the phylogenetic analysis of excised DGGE bands. DGGE profiles showed that acetochlor had a stimulating effect on AOB at the early stage after acetochlor amended, and the order of intensity and duration is medium-acetochlor amended samples (AM) > low-acetochlor amended samples (AL) > high-acetochlor amended samples (AH). At the end of 60 d microcosm, acetochlor had a negative effect on the diversity of AOB. Cluster analysis of DGGE profiles showed that acetochlor had a greater effect on the community structure of AOB on day 60 than on day 1. The phylogenetic analysis revealed that all the sequences of excised DGGE bands were closely related to members of the genus Nitrosospira and formed two separate subclusters designated as subcluster 1 and subcluster 2 affiliated respectively with clusters 3 and 4 in Nitrosospira as defined by Stephen. Some dominant AOB had a change from subcluster 2 to subcluster 1 with the incubation. The results showed that acetochlor had an effect on the AOB on a long-term basis and the chronic effect of acetochlor should be paid more attention in future. | Xinyu LI Chenggang ZHANG | 2008 | Journal of Environmental Sciences2008，20，9： | 7 |
| 11 | Serum interleukin-10 levels and adverse events in patients with acute coronary syndrome: a systematic review and meta-analysis显示文摘 | Liu Jun Jia Yanjun Li Xiaolin Xu Ruixia Zhu Chenggang Guo Yuanlin Wu Naqiong Li Jianjun | 2014 | Chinese Medical Journal2014，，1： | 6 |
| 12 | Study on Generation Cost Prediction Based on Coal Quality and Generating Unit Performance显示文摘燃料变化条件下发电成本的预测是火电厂普遍关心的重要课题。分析了影响机组性能及发电电量成本的各种煤质指标,重点研究了基于结构参数及燃烧传热机理的锅炉稳态热力性能分析计算方法,讨论了制粉系统、风机、脱硫和脱硝装置性能随燃料等运行条件的变化关系,最终提出了基于煤质和机组性能分析计算的发电电量成本预测模型并研发了“煤炭选配与机组发电成本预测系统”。该系统在我国某600MW火电厂的实际应用经验表明:提出的电量成本分析预测模型合理,研发的软件系统有助于辅助火电厂的选煤和购煤决策,优化动力配煤方案,从而提高火电厂的运行经济性。 | ZHONG Wei LIU Chenggang ZHOU Yonggang WU Yanling ZHOU Yi LI Pei | 2013 | 中国电机工程学报2013，33，11： | 6 |
| 13 | Impact of land use/cover changes on carbon storage in a river valley in arid areas of Northwest China显示文摘Soil carbon pools could become a CO_2 source or sink, depending on the directions of land use/cover changes. A slight change of soil carbon will inevitably affect the atmospheric CO_2 concentration and consequently the climate. Based on the data from 127 soil sample sites, 48 vegetation survey plots, and Landsat TM images, we analyzed the land use/cover changes, estimated soil organic carbon(SOC) storage and vegetation carbon storage of grassland, and discussed the impact of grassland changes on carbon storage during 2000 to 2013 in the Ili River Valley of Northwest China. The results indicate that the areal extents of forestland, shrubland, moderate-coverage grassland(MCG), and the waterbody(including glaciers) decreased while the areal extents of high-coverage grassland(HCG),low-coverage grassland(LCG), residential and industrial land, and cultivated land increased. The grassland SOC density in 0–100 cm depth varied with the coverage in a descending order of HCG>MCG>LCG.The regional grassland SOC storage in the depth of 0–100 cm in 2013 increased by 0.25×1011 kg compared with that in 2000. The regional vegetation carbon storage(S_(rvc)) of grassland was 5.27×10~9 kg in2013 and decreased by 15.7% compared to that in 2000. The vegetation carbon reserves of the under-ground parts of vegetation(S_(ruvb)) in 2013 was 0.68×10~9 kg and increased by approximately 19.01%compared to that in 2000. This research can improve our understanding about the impact of land use/cover changes on the carbon storage in arid areas of Northwest China. | YANG Yuhai LI Weihong ZHU Chenggang WANG Yang HUANG Xiang | 2017 | Journal of Arid Land2017，9，6： | 5 |
| 14 | High Efficient Methods of Content-based 3D Model Retrieval显示文摘Content-based 3D model retrieval is of great help to facilitate the reuse of existing designs and to inspire designers during conceptual design. However, there is still a gap to apply it in industry due to the low time efficiency. This paper presents two new methods with high efficiency to build a Content-based 3D model retrieval system. First, an improvement is made on the 'Shape Distribution (D2)' algorithm, and a new algorithm named 'Quick D2' is proposed. Four sample 3D mechanical models are used in an experiment to compare the time cost of the two algorithms. The result indicates that the time cost of Quick D2 is much lower than that of D2, while the descriptors extracted by the two algorithms are almost the same. Second, an expandable 3D model repository index method with high performance, namely, RBK index, is presented. On the basis of RBK index, the search space is pruned effectively during the search process, leading to a speed up of the whole system. The factors that influence the values of the key parameters of RBK index are discussed and an experimental method to find the optimal values of the key parameters is given. Finally, '3D Searcher', a content-based 3D model retrieval system is developed. By using the methods proposed, the time cost for the system to respond one query online is reduced by 75% on average. The system has been implemented in a manufacturing enterprise, and practical query examples during a case of the automobile rear axle design are also shown. The research method presented shows a new research perspective and can effectively improve the content-based 3D model retrieval efficiency. | WU Yuanhao TIAN Ling LI Chenggang | 2013 | Chinese Journal of Mechanical Engineering2013，26，2： | 5 |
| 15 | AlN Precipitates and Microstructure in Non-oriented Electrical Steels Produced by Twin-roll Casting Process显示文摘Aluminum nitride(AlN) precipitates and microstructure of 4 wt.%(Si+Al) non-oriented electrical steel were investigated.The 2.0 mm thick cast strips with three different silicon/aluminum(Si/Al) ratios were produced by twin-roll casting process,then the strips were reheated,warm rolled,cold rolled and annealed.The microstructure and AlN precipitates were characterized using optical microscopy,scanning electron microscopy and transmission electron microscopy.The results showed that with the increase of Si/Al ratio,on the one hand,the casting microstructure changed from columnar grains to equiaxed grains,and the uniformity of annealed microstructure was improved;On the other hand,the number of AlN precipitates in cast strips reduced meanwhile the distribution became dispersed.By the reheat treatment,the size and distribution of the AlN precipitates can be changed.Moreover,the grain size of the annealed strips is in the range of 20-50 μm,at the same time,many AlN precipitates were located at grain boundaries.Therefore,controlling the Si/Al ratio is a simple method to obtain desired microstructure.Then AlN precipitates in non-oriented electrical steel prepared by twin-roll casting process hinder markedly the recrystallized grains growth.A compatible reheat treatment can be an approach worth exploring to control the behavior of AlN precipitates. | Ting ZHANG Xiaoming ZHANG Zhiyuan GUO Yuqian WANG Chenggang LI Liangyun LAN | 2013 | Acta Metallurgica Sinica(English Letters)2013，26，4： | 5 |
| 16 | The microfacies and sedimentary responses to the mass extinction during the Permian-Triassic transition at Yangou Section, Jiangxi Province, South China显示文摘A Permian-Triassic(P-Tr) boundary section of continuous carbonate facies, which well recorded the biotic and environmental processes through the great P-Tr transition in the shallow non-microbialite carbonate facies, has been studied in Yangou, Leping County, Jiangxi Province. The P-Tr sequence is well correlated with the Meishan section according to the conodont biostratigraphy and the excursion of carbon isotopes. A series of high-resolution thin-sections from the P-Tr boundary carbonate rocks at the Yangou section are studied to explore the interrelation between environmental change and biological evolution during the transitional time. Six microfacies have been identified based upon the observation of the thin-sections under a microscope on the grains and matrix and their interrelation. Combined with the data of fossils and carbon isotopes, Microfacies 4(MF-4), coated-grain-bearing foraminifer oolitic sparitic limestone, and Microfacies 6(MF-6), dark shelly micritic limestone, should be the different responses to the two episodes of mass extinction and environmental events that can be correlated throughout South China and even over the world. The oolitic limestone of MF-4 is the first finding from the latest Permian strata in South China and it might be a proxy of an unusual environmental condition of high pCO2, low sulfate concentration and of microbial blooming in the aftermath of the latest Permian mass extinction. The micritic limestone of MF-6 containing rich micro-gastropods and ostracods probably represents the blooming event of disaster taxa in the earliest Triassic environment. The microfacies analysis at the Yangou section can well reveal the episodic process of the biological evolution and environmental change in the shallow non-microbialite carbonate facies throughout the great P-Tr transition, thus the Yangou section becomes an important complement to the Meishan section. | TIAN Li TONG JinNan SUN DongYing XIONG YanLin WANG ChengGang SONG HaiJun SONG HuYue HUANG YunFei | 2014 | Science China Earth Sciences2014，57，9： | 4 |
| 17 | The biogeochemical behavior of dissolved aluminum in the southern Yellow Sea:Influence of the spring phytoplankton bloom显示文摘Many recent studies have investigated the nutrient-type profiles of dissolved aluminum(Al) in the ocean.Significant scavenging of dissolved Al can occur during phytoplankton blooms,but the mechanism remains unclear.The distribution of dissolved Al in the southern Yellow Sea(SYS) was investigated in winter and spring 2009.Following measurements at grid stations during the spring sampling cruise,two drifting anchor surveys of more than 100 h were conducted to trace the variation of dissolved Al concentration during the spring phytoplankton bloom(SPB).The concentration of dissolved Al in the SYS decreased from 40 nmol/L in February to 30 nmol/L in March and 10-20 nmol/L in April,while the concentration of Chl a increased from < 2 μg/L in March to > 4 μg/L in April.The concentration of dissolved Al in the SYS decreased significantly with the development of the phytoplankton bloom,which indicated biological scavenging of dissolved Al from water column.The proportion of dissolved Al scavenged from water column by different phytoplankton species differed at the two drifting stations,with greater removal efficiency demonstrated by diatoms than dinoflagellates.Phytoplankton samples collected from the Chl a maximum layer were washed with trace metal clean reagent(oxalate-EDTA-citrate,abbreviate as oxalate solution,Tovar-Sanchez et al.,2003) to enable the surface-scavenged(extracellular) and intracellular Al pools associated with phytoplankton to be differentiated.Thirty-nine to ninetysix percent of the total Al was found to be existed in the interior pools,which indicated that biological absorption was the important way to scavenge dissolved Al during phytoplankton blooms in the SYS. | LI FaMing REN JingLing YAN Li LIU SuMei LIU ChengGang ZHOU Feng ZHANG Jing | 2013 | Chinese Science Bulletin2013，58，2： | 4 |
| 18 | The lifestyle transition of Arthrobotrys oligospora is mediated by microRNA-like RNAs显示文摘The lifestyle transition of fungi,defined as switching from taking organic material as nutrients to pathogens,is a fundamental phenomenon in nature.However,the mechanisms of such transition remain largely unknown.Here we show microRNA-like RNAs(milRNAs)play a key role in fungal lifestyle transition for the first time.We identified milRNAs by small RNA sequencing in Arthrobotrys oligospora,a known nematode-trapping fungus.Among them,7 highly expressed milRNAs were confirmed by northern-blot analysis.Knocking out two milRNAs significantly decreased A.oligospora’s ability to switch lifestyles.We further identified that two of these milRNAs were associated with argonaute protein QDE-2 by RNA-immunoprecipitation(RIP)analysis.Three of the predicted target genes of milRNAs were found in immunoprecipitation(IP)products of QDE-2.Disruption of argonaute gene qde-2 also led to serious defects in lifestyle transition.Interestingly,knocking out individual milRNAs or qde-2 lead to diverse responses under different conditions,and qde-2 itself may be targeted by the milRNAs.Collectively,it indicates the lifestyle transition of fungi is mediated by milRNAs through RNA interference(RNAi)machinery,revealing the wide existence of miRNAs in fungi kingdom and providing new insights into understanding the adaptation of fungi from scavengers to predators and the mechanisms underlying fungal infections. | Xinglai Ji Heng Li Weihua Zhang Jiai Wang Lianming Liang Chenggang Zou Zefen Yu Shuqun Liu Ke-Qin Zhang | 2020 | Science China(Life Sciences)2020，63，4： | 4 |
| 19 | A model considering solid-fluid interactions stemming from capillarity and adsorption mechanisms in unsaturated expansive clays显示文摘Solid-fluid interactions in unsaturated expansive clays can be divided into capillarity and adsorption effects based on their physical mechanisms. Most constitutive models for unsaturated soils are proposed on the basis of the capillarity mechanism, ignoring the contributions of the adsorption effect to mechanical and hydraulic behaviors. For expansive clays, however, the adsorption effect which leads to more complex behavioral characteristics than that in low plasticity clays cannot be ignored. In the light of this, a new binary-medium model for unsaturated expansive clays is proposed, involving a consideration of the solid-fluid interactions stemming from the capillary and the adsorption mechanisms at the same time.Firstly, we assume that expansive clay is a mixture of two ideal parts, i.e. the ideal capillarity part and the ideal adsorption part, and then an ideal capillarity model and an ideal adsorption model, each of which is available for the corresponding ideal part, are established. Furthermore, a participation function is used to reflect the degrees of capillarity effect and adsorption effect. Finally, predictions are performed on the results of the consolidation tests and the cyclical controlled-suction tests published in literature.After comparing predicted results with test results, it is illustrated that the established model can quantitatively predict mechanical and hydraulic behaviors in expansive clays. | Jian Li Chenggang Zhao Guoqing Cai Yanxin Guo | 2014 | Chinese Science Bulletin2014，59，26： | 4 |
| 20 | Two-stage local constrained sparse coding for fine-grained visual categorization显示文摘Fine-grained visual categorization(FGVC)[1,2]classifies the objects into categories which are both visually and semantically similar.Currently,the FGVC has included many species,i.e.,flowers,birds,and dogs.In these species,all categories have a characteristic with intra-class diversity and inter-class similarity. | Lihua GUO Chenggang GUO Lei LI Qinghua HUANG Yanshan LI Xuelong LI | 2018 | Science China(Information Sciences)2018，61，1： | 4 |
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