摘要：In order to assess the performance of the embankment soil under various climate conditions during the period of service, the modulus behaviour of an unsaturated compacted soil is evaluated using the constant water content triaxial test. Since the water content measurement method is simple and economical and it is used widely in engineering, the soil suction is replaced by the water content and the relationship between the water content and the modulus is developed. The compacted samples are prepared with different compacted water contents, and samples with a similar water content subjected to drying or wetting procedures prior to the triaxial test are also investigated. The effect of the water content and the confining pressure on the modulus is analyzed. The results show that the modulus decreases with the increase in the water content and a power function can be proposed to quantitatively describe the relationship between the modulus and the water content in the range of the measured water content. The modulus increases with the increase in the confining pressure of the compacted soil. However, the effect of the water content on the modulus is more pronounced than that of the confining pressure. This research can be referenced for the compacted embankment soil assessment in-service period.

摘要：Hydrogels are a class of special materials that contain a large amount of water and behave like *** materials have found broad applications in tissue engineering,cell culturing,regenerative medicine ***,the exploration of peptide-based supramolecular hydrogels has greatly expanded the repertoire of hydrogels suitable for biomedical ***,the mechanical properties of peptide-based hydrogels are intrinsically ***,it is crucial to develop methods that can improve the mechanical stability of such peptide-based *** this review,we explore the factors that determine or influence the mechanical stability of peptide-based hydrogels and summarize several key elements that may guide scientists to achieve mechanically improved *** addition,we exemplified several methods that have been successfully developed to prepare hydrogels with enhanced mechanical *** mechanically strong peptide-based hydrogels may find broad applications as novel *** is still challenging to engineer hydrogels in order to mimic the mechanical properties of biological *** hydrogel materials with optimal mechanical properties suitable for various types of biological applications will be available in the near future.

摘要：Let M be a convex Chebyshev subset of a uniformly convex and uniformly smooth Banach *** is proved that the metric projection P_M of X onto M is uniformly continu- ous on every bounded subset of ***,a global and explicit estimate on the modulus of continuity of the metric projection is obtained.

摘要：The compressing,stretching,bending,and shearing stress of reed stalk growing in the Yangtze River region were investigated by using a computer-controlled electronic universal testing *** results were as follows:the average maximum values of the stress resistance intensity,pulling resistance intensity,the average of maximum bending resistance intensity,and shearing resistance intensity were 22 MPa,152 MPa,118 MPa and 26 MPa,respectively,whereas the equivalent values of the modulus of elasticity were 45 MPa,321 MPa,77 MPa and 286 MPa,*** stalk of reed is a kind of anisotropic material and it is different from Arundo donax L.,ramie and ***,the traditional agricultural machine for cutting and processing is found to be inconvenient to use in reed *** data of the experiments provided an important foundation for determining the structural parameters of reed cutter.

摘要：To accelerate the development and design of magnesium(Mg)alloys,the structural and mechanical properties of important precipitates in Mg−Zn alloys were studied by experiments and density functional *** nano-indentation tests revealed that the hardness of the precipitates initially increased and then decreased with increasing Zn content,and was significantly higher than that of pure Mg and *** calculation results revealed that the precipitates stability initially increased and then decreased with increasing Zn *** bulk moduli of the precipitates increased,whereas their shear and Young’s moduli initially increased and then decreased with increasing Zn *** decreasing order of ductility for these compounds is MgZn_(2)>Mg_(21)Zn_(25)>Mg_(2)Zn_(11)>Mg_(4)Zn_(7).The surface profiles of the compounds revealed that they are obvious *** the degree of covalency and bond length of covalent bonds initially increased and then decreased with increasing Zn content.

摘要：In this paper, the wave propagation in functionally graded materials (FGM) is studied by the elastic wave theory based on thewave problems in homogeneous media. The auxiliary function and modulus function are introduced to construct the displacementfield and density function. The displacement field, modulus function, and density function are connected to proposea design theory of special FGM. An analytical method for elastic wave propagation in inhomogeneous media with varyingmodulus and density is derived to provide theoretical references for material design and dynamic stress analysis under elasticwaves. Taking the problem of dynamic stress concentration caused by shallow buried elliptical cavity in half space designedunder SH waves as an example, the calculation results are obtained and analyzed. The results show that the dynamic stressconcentration is sensitive to the change of the inhomogeneity of the medium.

摘要：LNG船由于货物传输时的高风险性,以及船对岸、船对船靠泊的多样性,对系泊稳定性的要求可谓是重中之重。为了不断完善系泊的设计标准,通过多年的系泊实践,以及对船员系泊经验的总结,OCIMF给出了系泊力计算时对风力,水流力,波浪等自然环境条件的选取引导,对系泊缆绳的材质,强度及断裂伸长率做出了详细对比及选取推荐,对导缆孔等系泊件强度计算时的缆绳合力包角及安全系数给出了合理性的范围指导。而在实船设计中,发现超高分子系泊缆绳HMPE和系泊件强度之间产生了一种不可调和的矛盾,确实存在极端受力下系泊件先于HMPE缆绳破损的潜在风险,进而导致缆绳及系泊件碰坏甲板设备和管路。后面分别从系泊力计算,系泊缆绳的选取,缆绳工厂拉力试验,系泊件的选取,实际系泊工况出发,得出最终结论,此风险几乎不可能出现。

摘要：A blind demodulator for 1024 quadrature amplitudemodulation(QAM)is *** uses a method thatcombines carrier recovery without decision-directed opera-tion and decision feedback equalization by using a modi-fied constant modulus algorithm(MCMA)to improve e-qualization.