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Jing Xu Hao Wang Tao Liang XiangSheng Cai XiuRong Rao ZhenBo Huang GuoQing Sheng 《科学通报(英文版)》2011,56(23):2520-2520
The authors report that incorrect figures were included as Figures 4 and 5 in the original publication of this paper. This error occurred during the figure editing process of the publishing company. This information should have been presented as follows: 相似文献
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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. 相似文献
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The influence of gases on unsaturated soils is discussed in the paper.First,the selection of stress state variables is discussed.It is shown that gas pressure as well as generalized effective stress and modified suction are required to construct a constitutive model of an unsaturated soil.The deformation mechanisms of solid,liquid and gas phases in soils are then investigated.It is realized that the deformation of gas phase interacts with the deformations of the other two phases in soils.Gas laws are used to describe the gas behavior.Similar to the other two phases in soil,the change of gas volume can be divided into an elastic part and a plastic part, and the latter part is then introduced to the soil hardening equation to reflect the impact of the gas on the soil.Then,a simple elasto-plastic model considering the gas effect for isotropic states is developed.Finally,the model predictions are given and compared with existing experimental data.A good agreement between them is found.Comparisons of the predictions between our model and Wheeler’s model are also performed. 相似文献
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用磁控溅射法在加热到400℃的MgO(001)单晶基片上沉积了总厚度为25 nm 的[Fe(0.6 nm)/Fe30.5Pt69.5(1.9 nm)]10 多层连续薄膜, 总成分配比为Fe50Pt50. 然后对其在[500, 900]℃温度范围进行真空热处理, 分析了热处理温度对薄膜表面形貌、晶体结构以及磁特性的影响. 结果表明, 在加热基片上生长的FePt 薄膜, 层间已经发生扩散, 形成无序的A1 相. 经过700℃以上的高温热处理, 薄膜转变为具有(001)织构的L10相FePt 合金, 易磁化轴沿垂直于膜面的方向, 有序度大于0.85, 单轴磁晶各向异性能约2.7×107 erg/cc. 利用扩散后残存的周期性微弱成分起伏, 可以使薄膜在800℃以下保持形貌连续. 用原子力显微镜对薄膜表面进行观察证实, 在780℃进行热处理, 薄膜的表面最平整. 这种优质的连续薄膜可以应用于微加工制作超高密度垂直磁记录阵列介质. 相似文献
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We investigated the dynamic properties of a two-section composite chain of beads under vertical vibration.By analyzing the chain’s motion,including phase-shift,mean dilation,center-of-mass displacement,and energy,we found that with different bead arrangements,the chain behaved in different ways.We believe that interaction existing at the interface between bead sections provides the underlying cause.This interaction causes different energy in different arrangements,which leads to different dynamic characteristics. 相似文献
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当不同动能(350-600keV)高电荷态离子129Xe30+入射Au表面过程中,发出了1.65keV的X射线和靶原子的Mα特征X射线.分析表明:高电荷态离子与Au表面相互作用过程中,Xe离子3d壳层的电子被激发,形成空穴,4f电子偶极跃迁辐射1.65keVM-X射线.同时,靶原子Au的3s电子被激发,退激辐射M-X射线.利用经典过垒模型解释了Xe的M-X射的产额随入射离子的动能增加而减小,靶原子的特征X射线产额随入射离子的动能增加而增加的原因. 相似文献
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Triphenyltin (TPT) widely exists as environmental pollutant, but its toxicity towards nerve cells and the related mechanism remain unclear. In this research, SHSY-5Y cells were exposed to TPT, and the cellular proteasome activity, Iκb proteins, Bax and α-synuclein levels were investigated. The results show that TPT can inhibit the cellular proteasome activity, and result in the accumulation of ubiquitinized proteins. TPT exposure can change the protein levels of IκB, Bax, and α-synuclein, affect NFκB pathwa... 相似文献
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An Yan GuoHui Ding ZhenFeng Zhou Hui Dong YaKun Zhang Lei Zhu YunGang He GuoQing Zhang YiXue Li Bing Sun Zhong Huang Ke Lan Li Jin HongYan Wang XiaoNing Wang Zhong Yang Yang Zhong JianXin Dai YaJun Guo Hao Wang XiaoYan Che Fan Wu ZhenGan Yuan Xi Zhang ZhiWei Cao XiaoNong Zhou JiaHai Zhou ZhiYong Ma GuangZhi Tong GuoPing Zhao WeiRong Jin Hui Xiong 《科学通报(英文版)》2009,54(13):2164-2167
The outbreak of a novel influenza A (H1N1) virus across the globe poses a threat to human health. It is of paramount importance to develop a rapid, reliable and inexpensive diagnostic procedure. Based on the bioinformatic information from public database, primers specific for influenza A virus surface protein haemagglutinin (HA) of several subtypes (including H1, H2, H3, H5, H7 and H9) were designed. Primer-specific PCR products were subiected to sequencing for accurately distinguishing H1 and H3 subtypes from others. This sequencing-based detection method will not only be applied to rapid detection and simultaneous subtype identification of new influenza A virus H1N1, but also provide the strategies to monitor other new types of influenza virus with explosive potential. 相似文献