Experimental study was carried out on the in-plane bending behavior of glass plates without lateral supports, and the effects of the factors, such as height-to-span ratio, on the stability of glass panels were studied...Experimental study was carried out on the in-plane bending behavior of glass plates without lateral supports, and the effects of the factors, such as height-to-span ratio, on the stability of glass panels were studied. Results show that the in-plane bending glass plates with both ends simply supported and their upper edge free lose overall stability under loads, which belongs to the limit-point type of instability. It is found that the buckling load increases linearly with the increase of height-to-span ratio of the glass plates. The lateral stress of in-plane bending glass plates without lateral supports increases linearly under loads; while the large-area stress increases nonlinearly and the lateral stress is not the controlling factor of instability. In finite element analysis, the first buckling mode is regarded as the initial imperfection and imposed on the model as 1/1000 of the span of the components. The numerical buckling load according to the theory of large deflection is less than the experiment result, which is more conservative and can provide some reference for design. For the design method, when the in-plane load is imposed on the glass plate, its lateral strength and the deflection should be verified. Considering the stability of the in-plane bending glass plate without reliable lateral support, buckling is another possible failure mode and calls for verification.展开更多
In the present paper, the authors sum up results of acupuncture treatment of 35 cases of facial spasm. Of the 35 cases, 14 were male and 21 female, ranging in age from 19 to 62 years and in the disease duration from 1...In the present paper, the authors sum up results of acupuncture treatment of 35 cases of facial spasm. Of the 35 cases, 14 were male and 21 female, ranging in age from 19 to 62 years and in the disease duration from 1 week to 21 years. Shallow needling was applied to the surrounding region of Ahshi points (the twitching locus), Hegu (LI 4), Taichong (LR 3), etc., once daily, 4 weeks altogether. In addition, according to syndrome differentiation, other acupoints as Fengchi (GB 20), Waiguan (TE 5), Zusanli (ST 36), Sanyinjiao (SP 6), etc. were supplemented. After treatment, out of the 35 cases, 26 (74.3%) were cured, 5 (14.3%) experienced markedly improvement, and the rest 4 (11.4%) cases had a certain degree of amelioration. The key point for treating facial spasm is applying shallow needling around the twitching muscles.展开更多
Stability tests of three plate girders laterally unbraced on both ends, which were scale models of real plate girders in heavy plants for tower-type boilers, are presented and investigated. The applicability of code p...Stability tests of three plate girders laterally unbraced on both ends, which were scale models of real plate girders in heavy plants for tower-type boilers, are presented and investigated. The applicability of code provisions in ANSI/AISC 360-10 about such members is discussed. A nonlinear finite element analysis was carried out, considering the combined effects of plasticity, residual stress and geometrical imperfections, to simulate the stability behavior of the specimens. The reliability of the numerical model was validated by comparisons with experimental results. The results show that stability behavior of plate girders with laterally unbraced ends is widely different from that of typical simply supported thin-walled beams. The structural response is also sensitive to initial geometrical imperfections of this objects. The model is used to improve the mechanical design of transverse stiffeners over the supports. The positive effect and offsetting influence of imperfections of thicker and additional transverse stiffeners on overall stability behavior are highlighted. A few suggestions for design process are also given.展开更多
Depending upon the descriptions of the ancient literature, such as Jin Zhen Fu （Odes to Golden Needles, 《金针赋》）, the dragon-tiger fighting needling technique has the effects to dredge the meridians, circulate qi...Depending upon the descriptions of the ancient literature, such as Jin Zhen Fu （Odes to Golden Needles, 《金针赋》）, the dragon-tiger fighting needling technique has the effects to dredge the meridians, circulate qi, activate blood, stop and remove pain. ＂Dragon＂ implies to twist the needle leftward for reinforcing, and ＂tiger＂ means to twist the needle rightward for reducing. To twist the needle leftward and rightward alternately is termed ＂fighting＂ After the arrival of the needling sensation by inserting the needle to the proper depth, the needle is first twisted leftward with the thumb forward in a method of nine yang numbers, and then twisted backward and rightward with the thumb backward in a method of six yin numbers, in alternation of reinforcing and reducing repeatedly. Therefore, the general information on clinical application of dragon-tiger fighting needling technique in the recent sixteen years is given in the following.展开更多
文摘Experimental study was carried out on the in-plane bending behavior of glass plates without lateral supports, and the effects of the factors, such as height-to-span ratio, on the stability of glass panels were studied. Results show that the in-plane bending glass plates with both ends simply supported and their upper edge free lose overall stability under loads, which belongs to the limit-point type of instability. It is found that the buckling load increases linearly with the increase of height-to-span ratio of the glass plates. The lateral stress of in-plane bending glass plates without lateral supports increases linearly under loads; while the large-area stress increases nonlinearly and the lateral stress is not the controlling factor of instability. In finite element analysis, the first buckling mode is regarded as the initial imperfection and imposed on the model as 1/1000 of the span of the components. The numerical buckling load according to the theory of large deflection is less than the experiment result, which is more conservative and can provide some reference for design. For the design method, when the in-plane load is imposed on the glass plate, its lateral strength and the deflection should be verified. Considering the stability of the in-plane bending glass plate without reliable lateral support, buckling is another possible failure mode and calls for verification.
文摘In the present paper, the authors sum up results of acupuncture treatment of 35 cases of facial spasm. Of the 35 cases, 14 were male and 21 female, ranging in age from 19 to 62 years and in the disease duration from 1 week to 21 years. Shallow needling was applied to the surrounding region of Ahshi points (the twitching locus), Hegu (LI 4), Taichong (LR 3), etc., once daily, 4 weeks altogether. In addition, according to syndrome differentiation, other acupoints as Fengchi (GB 20), Waiguan (TE 5), Zusanli (ST 36), Sanyinjiao (SP 6), etc. were supplemented. After treatment, out of the 35 cases, 26 (74.3%) were cured, 5 (14.3%) experienced markedly improvement, and the rest 4 (11.4%) cases had a certain degree of amelioration. The key point for treating facial spasm is applying shallow needling around the twitching muscles.
基金The authors gratefully acknowledge sponsors of this research： National Science Foundation of China （No. 51278296）.
文摘Stability tests of three plate girders laterally unbraced on both ends, which were scale models of real plate girders in heavy plants for tower-type boilers, are presented and investigated. The applicability of code provisions in ANSI/AISC 360-10 about such members is discussed. A nonlinear finite element analysis was carried out, considering the combined effects of plasticity, residual stress and geometrical imperfections, to simulate the stability behavior of the specimens. The reliability of the numerical model was validated by comparisons with experimental results. The results show that stability behavior of plate girders with laterally unbraced ends is widely different from that of typical simply supported thin-walled beams. The structural response is also sensitive to initial geometrical imperfections of this objects. The model is used to improve the mechanical design of transverse stiffeners over the supports. The positive effect and offsetting influence of imperfections of thicker and additional transverse stiffeners on overall stability behavior are highlighted. A few suggestions for design process are also given.
文摘Depending upon the descriptions of the ancient literature, such as Jin Zhen Fu （Odes to Golden Needles, 《金针赋》）, the dragon-tiger fighting needling technique has the effects to dredge the meridians, circulate qi, activate blood, stop and remove pain. ＂Dragon＂ implies to twist the needle leftward for reinforcing, and ＂tiger＂ means to twist the needle rightward for reducing. To twist the needle leftward and rightward alternately is termed ＂fighting＂ After the arrival of the needling sensation by inserting the needle to the proper depth, the needle is first twisted leftward with the thumb forward in a method of nine yang numbers, and then twisted backward and rightward with the thumb backward in a method of six yin numbers, in alternation of reinforcing and reducing repeatedly. Therefore, the general information on clinical application of dragon-tiger fighting needling technique in the recent sixteen years is given in the following.
