排序方式： 共有9条查询结果，搜索用时 15 毫秒
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在比较研究标本室标本，包括模式标本以及野外考察的基础上，确认Chaetoseris hispida Shih 与Ch. cyanea (D. Don) Shih为同种植物，并把前者作为后者的异名处理。 相似文献
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SUNG Wen-pei GO Cheer-germ SHIH Ming-hsiang 《浙江大学学报(A卷英文版)》2007,8(9):1373-1379
The characteristic properties of shell element with similar shapes are used to generate a so-called super element for the analysis of the crack problems for cylindrical pressure vessels. The formulation is processed by matrix condensation without the involvement of special treatment. This method can deal with various singularity problems and it also presents excellent results to crack problems for cylindrical shell. Especially,the knowledge of the kind of singular order is not necessary in super element generation; it is very economical in terms of computer memory and programming. This method also exhibits versatility to solve the problem of kinked crack at cylindrical shell. 相似文献
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Investigation of newly developed added damping and stiffness device with low yield strength steel 总被引：2，自引：0，他引：2
INTRODUCTIONThisresearchfocusedonusingthemechanicalpropertiesoflowyieldstrengthsteel(LYS)tode-velopanewdeviceforaddeddampingandstiffnessandseismicresistanceofrhombiclowyieldstrengthsteelplate.ThemechanicalpropertiesofLYSandtheeffectofthisnewlydevelopeddevicewereinvestigatedbyexperimentalmethod.Ex-pectedly,thisnewdevicecantakeadvantageofplasticenergyabsorbabilitytoabsorbanddissipatetheenergyofearthquakestablyandensurethesafetyofthemainstructure.Ananalyticalmodelisproposedforanalyzingtheh… 相似文献
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CHEN Kuen-suan SUNG Wen-pei SHIH Ming-hsiang 《浙江大学学报(A卷英文版)》2005,6(8):836-843
INTRODUCTION In recent years, devastating disasters in whichreinforced concrete structures collapsed have causedmajor loss of life and property damage around thworld. Investigation of these incidents showed thathe collapses were mainly due to the poor concretquality (NCREE, 1999; SECL, 1999; Watabe, 1995)Therefore, high quality assurance in reinforced concrete (RC) structure design and manufacturing is onof the most important safety factors. To promote threliability of structure, co… 相似文献
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指定了多裂紫菊Prenanthes henryi Dunn (=Notoseris henryi (Dunn) Shih)的后选模式。 相似文献
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SUNGWen-pei LINCheng-I SHIHMing-hsiang GOCheer-germ 《浙江大学学报(A卷英文版)》2005,6(2):132-140
In view of the recent technological development, the pursuit of safe high-precision structural designs has been the goal of most structural designers. To bridge the gap between the construction theories and the actual construction techniques, safety factors are adopted for designing the strength loading of structural members. If safety factors are too conservative, the extra building materials necessary will result in high construction cost. Thus, there has been a tendency in the construction field to derive a precise buckling load analysis model of member in order to establish accurate safety factors. A numerical analysis model, using modal analysis to acquire the dynamic function calculated by dynamic parameter to get the buckling load of member, is proposed in this paper. The fixed and simple supports around the circular plate are analyzed by this proposed method. And then, the Monte Carlo method and the normal distribution method are used for random sampling and measuring errors of numerical simulati 相似文献
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System identification is a method for using measured data to create or improve a mathematical model of the object being tested. From the measured data however, noise is noticed at the beginning of the response. One solution to avoid this noise problem is to skip the noisy data and then use the initial conditions as active parameters, to be found by using the system identification process. This paper describes the development of the equations for setting up the initial conditions as active parameters. The simulated data and response data from actual shear buildings were used to prove the accuracy of both the algorithm and the computer program, which include the initial conditions as active parameters. The numerical and experimental model analysis showed that the value of mass, stiffness and frequency were very reasonable and that the computed acceleration and measured acceleration matched very well. 相似文献
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SUNG Wen-pei SHIH Ming-hsiang LIN Cheng-I GO Cheer Germ 《浙江大学学报(A卷英文版)》2005,6(8):878-885
INTRODUCTION The conventional design of rails uses steel clipboards and bolts to link rails, and avoids bucklingcaused by thermal expansion effect by mountingexpansion joints to solve axial restraint generated byseasonal or day-and-night temperature changes. Butthe discontinuity at the rail joints brings discomfortand noise to passengers when the train has suddenlystops or starts, during which train speed cannot beeffectively increased, rails are more easily damaged,and the cost of mainte… 相似文献
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System identification is a method for using measured data to create or improve a mathematical model of the object being tested. From the measured data however, noise is noticed at the beginning of the response. One solution to avoid this noise problem is to skip the noisy data and then use the initial conditions as active parameters, to be found by using the system identification process. This paper describes the development of the equations for setting up the initial conditions as active parameters. The simulated data and response data from actual shear buildings were used to prove the accuracy of both the algorithm and the computer program, which include the initial conditions as active parameters. The numerical and experimental model analysis showed that the value of mass, stiffness and frequency were very reasonable and that the computed acceleration and measured acceleration matched very well. 相似文献
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