Double-hand manipulation is a needling technique, with which No. 30 filiform needles of various lengths are selected and inserted into the affected part of the body in opposite directions or symmetrically upward-downw...Double-hand manipulation is a needling technique, with which No. 30 filiform needles of various lengths are selected and inserted into the affected part of the body in opposite directions or symmetrically upward-downward, rightward- leftward, anteriorly-posteriorly to the point, followed by needle twirling with both hands. When the two opposite needle tips are twirled to a certain degree, the soreness, warm, numbness, and distending needling sensation tends be connected in a line, forming a rather strong needling sensation. After such manipulation for some time, the needles are retained for 30 min., during which the needle manipulation is given 3-5 times at intervals. This needling treatment is given once daily. The author of this article has adopted this manipulation method in the acupuncture treatment of various diseases with quite satisfactory results. Some of the sample cases are listed as follows.展开更多
Friction stir welding (FSW) of aluminum alloys is currently utilized in several modern industries. The joints must have sufficient elastic?plastic response and formability levels similar to that of the base metal. In ...Friction stir welding (FSW) of aluminum alloys is currently utilized in several modern industries. The joints must have sufficient elastic?plastic response and formability levels similar to that of the base metal. In this work, double-sided FSW of AA6061 sheet was compared with its conventional single-sided one. An adjustable tool with different pin lengths (50%?95% of the sheet thickness) was used to perform the double-sided welds. Macro- and micro-structures, strength, and hardness of the joints were investigated to determine the optimum pin penetration depth. The best results were obtained for a double-sided joint made by a pin length equal to 65% of the sheet thickness, which showed an increase of 41% in the ultimate tensile strength compared with the single-sided joint.展开更多
文摘Double-hand manipulation is a needling technique, with which No. 30 filiform needles of various lengths are selected and inserted into the affected part of the body in opposite directions or symmetrically upward-downward, rightward- leftward, anteriorly-posteriorly to the point, followed by needle twirling with both hands. When the two opposite needle tips are twirled to a certain degree, the soreness, warm, numbness, and distending needling sensation tends be connected in a line, forming a rather strong needling sensation. After such manipulation for some time, the needles are retained for 30 min., during which the needle manipulation is given 3-5 times at intervals. This needling treatment is given once daily. The author of this article has adopted this manipulation method in the acupuncture treatment of various diseases with quite satisfactory results. Some of the sample cases are listed as follows.
基金The support of Iran National Science Foundation (INSF) (Grant No. 91051732)
文摘Friction stir welding (FSW) of aluminum alloys is currently utilized in several modern industries. The joints must have sufficient elastic?plastic response and formability levels similar to that of the base metal. In this work, double-sided FSW of AA6061 sheet was compared with its conventional single-sided one. An adjustable tool with different pin lengths (50%?95% of the sheet thickness) was used to perform the double-sided welds. Macro- and micro-structures, strength, and hardness of the joints were investigated to determine the optimum pin penetration depth. The best results were obtained for a double-sided joint made by a pin length equal to 65% of the sheet thickness, which showed an increase of 41% in the ultimate tensile strength compared with the single-sided joint.
