Al-substituted α-Ni（OH）2 was synthesized under different reaction conditions by a homogeneous precipitation method. The effect of reaction temperature, reaction time, Ni and Al ions concentration and reagent ratio ...Al-substituted α-Ni（OH）2 was synthesized under different reaction conditions by a homogeneous precipitation method. The effect of reaction temperature, reaction time, Ni and Al ions concentration and reagent ratio on the physico-chemical properties and electrochemical performance of Al-substituted α-Ni（OH）2 was studied. The Al-substituted α-Ni（OH）2 samples were characterized by X-ray diffractometry（XRD）, infrared spectrometry（FT-IR）, inductively coupled plasma（ICP）, thermogravimetry（TG） and electrochemical test. The results reveal that the physico-chemical properties and electrochemical performance of the sample are influenced strongly by the preparation conditions. Keeping reaction temperature at 100 or 104℃ is appropriate and the largest specific discharge capacity of the sample is 320mA·h/g. With the reaction time increasing, the discharge capacity increases first and then decreases slightly. It is appropriate that the Ni and Al ions concentration and the ratio of urea to Ni and Al ions are 0.42mol/L and 0.75∶1, respectively.展开更多
Modem and efficient methods focus on signal analysis and have drawn researchers＇ attention to it in recent years. These methods mainly include Continuous Wavelet and Wavelet Packet transforms. The main advantage of t...Modem and efficient methods focus on signal analysis and have drawn researchers＇ attention to it in recent years. These methods mainly include Continuous Wavelet and Wavelet Packet transforms. The main advantage of the application of these Wavelets is their capacity to analyze the signal position in different occasions and places. However, in sites with high frequencies its resolution becomes much more difficult. Wavelet packet transform is a more advanced form of continuous wavelets and can make a perfect level by level resolution for each signal. Although very few studies have been done in the field. In order to do this, in the present study, f^st there was an attempt to do a modal analysis on the structure by the ANSYS finite elements software, then using MATLAB, the wavelet was investigated through a continuous wavelet analysis. Finally the results were displayed in 2-D location-coefficient figures. In the second form, transient-dynamic analysis was done on the structure to find out the characteristics of the damage and the wavelet packet energy rate index was suggested. The results indicate that suggested index in the second form is both practical and applicable, and also this index is sensitive to the intensity of the damage.展开更多
Background：The main goals of flexor tendon surgery are to restore digital motion by providing tendon healing and to preserve tendon gliding.Our purpose was to investigate the effects of 5-fluorouracil （5-FU） on ten...Background：The main goals of flexor tendon surgery are to restore digital motion by providing tendon healing and to preserve tendon gliding.Our purpose was to investigate the effects of 5-fluorouracil （5-FU） on tendon adhesions in partially divided profundus flexor tendons （flexor digitorum profundus [FDPs]） following surgical repair and in partially divided FDPs without surgical repair,and to compare the results of the repair versus the nonrepair of zone two injuries via macroscopic and biomechanical evaluations of tendon adhesions.Methods：We used 32 adult male European rabbits （Oryctolagus cunniculus） weighing from 2.5 to 3.5 kg.The study was performed on the deep flexor tendons of the second and third digits of the right hind paws of the rabbits;thus,a total of 64 tendons were examined in this study.Results：Based on the results achieved in our experimental study,the load （N） significantly increased in subgroup 1a in which the tendons were surgically repaired and were not treated with 5-FU compared with subgroup 2a in which tendons were surgically repaired and treated with 5-FU.Conclusions：The load （N） significantly increased in subgroup 1 a in which the tendons were surgically repaired and were not treated with 5-FU compared to subgroup 2a in which the tendons were surgically repaired and treated with 5-FU.Therefore,these results revealed a decrease in adhesion formation in the subgroup that was treated with 5-FU due to increased resistance to tendon adhesions during their excursion through the tendon sheath,which in this case required greater traction force.展开更多
文摘Al-substituted α-Ni（OH）2 was synthesized under different reaction conditions by a homogeneous precipitation method. The effect of reaction temperature, reaction time, Ni and Al ions concentration and reagent ratio on the physico-chemical properties and electrochemical performance of Al-substituted α-Ni（OH）2 was studied. The Al-substituted α-Ni（OH）2 samples were characterized by X-ray diffractometry（XRD）, infrared spectrometry（FT-IR）, inductively coupled plasma（ICP）, thermogravimetry（TG） and electrochemical test. The results reveal that the physico-chemical properties and electrochemical performance of the sample are influenced strongly by the preparation conditions. Keeping reaction temperature at 100 or 104℃ is appropriate and the largest specific discharge capacity of the sample is 320mA·h/g. With the reaction time increasing, the discharge capacity increases first and then decreases slightly. It is appropriate that the Ni and Al ions concentration and the ratio of urea to Ni and Al ions are 0.42mol/L and 0.75∶1, respectively.
文摘Modem and efficient methods focus on signal analysis and have drawn researchers＇ attention to it in recent years. These methods mainly include Continuous Wavelet and Wavelet Packet transforms. The main advantage of the application of these Wavelets is their capacity to analyze the signal position in different occasions and places. However, in sites with high frequencies its resolution becomes much more difficult. Wavelet packet transform is a more advanced form of continuous wavelets and can make a perfect level by level resolution for each signal. Although very few studies have been done in the field. In order to do this, in the present study, f^st there was an attempt to do a modal analysis on the structure by the ANSYS finite elements software, then using MATLAB, the wavelet was investigated through a continuous wavelet analysis. Finally the results were displayed in 2-D location-coefficient figures. In the second form, transient-dynamic analysis was done on the structure to find out the characteristics of the damage and the wavelet packet energy rate index was suggested. The results indicate that suggested index in the second form is both practical and applicable, and also this index is sensitive to the intensity of the damage.
文摘Background：The main goals of flexor tendon surgery are to restore digital motion by providing tendon healing and to preserve tendon gliding.Our purpose was to investigate the effects of 5-fluorouracil （5-FU） on tendon adhesions in partially divided profundus flexor tendons （flexor digitorum profundus [FDPs]） following surgical repair and in partially divided FDPs without surgical repair,and to compare the results of the repair versus the nonrepair of zone two injuries via macroscopic and biomechanical evaluations of tendon adhesions.Methods：We used 32 adult male European rabbits （Oryctolagus cunniculus） weighing from 2.5 to 3.5 kg.The study was performed on the deep flexor tendons of the second and third digits of the right hind paws of the rabbits;thus,a total of 64 tendons were examined in this study.Results：Based on the results achieved in our experimental study,the load （N） significantly increased in subgroup 1a in which the tendons were surgically repaired and were not treated with 5-FU compared with subgroup 2a in which tendons were surgically repaired and treated with 5-FU.Conclusions：The load （N） significantly increased in subgroup 1 a in which the tendons were surgically repaired and were not treated with 5-FU compared to subgroup 2a in which the tendons were surgically repaired and treated with 5-FU.Therefore,these results revealed a decrease in adhesion formation in the subgroup that was treated with 5-FU due to increased resistance to tendon adhesions during their excursion through the tendon sheath,which in this case required greater traction force.
