The plane elastic problem for a semi-strip with a transverse crack is inves- tigated. The initial problem is reduced to a one-dimensional continuous problem by use of an integral transformation method with a generaliz...The plane elastic problem for a semi-strip with a transverse crack is inves- tigated. The initial problem is reduced to a one-dimensional continuous problem by use of an integral transformation method with a generalized scheme. The one-dimensional problem is first formulated as a vector boundary problem, and then reduced to a system of three singular integral equations （SIEs）. The system is solved by use of an orthogonal polynomial method and a special generalized method. The contribution of this work is the consideration of kernel fixed singularities in solving the system. The crack length and its location relative to the semi-strip＇s lateral sides are investigated to simplify the problem＇s statement. This simplification reduces the initial problem to a system of two SIEs.展开更多
In this paper,we have reported the sy nthesis of highly-ordered mesoporo us material with domestic AucP as templating agent.The product has a BET surface area of 534.8m 2 ·g -1 ,pore size of 4.6nm and pore volume...In this paper,we have reported the sy nthesis of highly-ordered mesoporo us material with domestic AucP as templating agent.The product has a BET surface area of 534.8m 2 ·g -1 ,pore size of 4.6nm and pore volume of0.68cm 3 ·g -1 .The synthesis cost of FDU-7is much l ower than that of SBA-15(just 25%of SBA-15),which will be much helpful to the industrializa tion of such mesoporous materials.展开更多
文摘The plane elastic problem for a semi-strip with a transverse crack is inves- tigated. The initial problem is reduced to a one-dimensional continuous problem by use of an integral transformation method with a generalized scheme. The one-dimensional problem is first formulated as a vector boundary problem, and then reduced to a system of three singular integral equations （SIEs）. The system is solved by use of an orthogonal polynomial method and a special generalized method. The contribution of this work is the consideration of kernel fixed singularities in solving the system. The crack length and its location relative to the semi-strip＇s lateral sides are investigated to simplify the problem＇s statement. This simplification reduces the initial problem to a system of two SIEs.
文摘In this paper,we have reported the sy nthesis of highly-ordered mesoporo us material with domestic AucP as templating agent.The product has a BET surface area of 534.8m 2 ·g -1 ,pore size of 4.6nm and pore volume of0.68cm 3 ·g -1 .The synthesis cost of FDU-7is much l ower than that of SBA-15(just 25%of SBA-15),which will be much helpful to the industrializa tion of such mesoporous materials.
