Micro arc oxidation(MAO) and electrophoretic deposition(EPD) process are employed to fabricate a dense coating on magnesium alloy to protect it from corrosion in engineering application. The EPD film changes the dampi...Micro arc oxidation(MAO) and electrophoretic deposition(EPD) process are employed to fabricate a dense coating on magnesium alloy to protect it from corrosion in engineering application. The EPD film changes the damping characteristic of magnesium alloy, and both the MAO and EPD process change the bending stiffness of samples being treated. Damping loss factor(DLF) test and sound transmission experiments were carried out for AZ31 B magnesium alloy with coating fabricated by MAO and EPD processes. The results indicate that DLF is improved in frequency range from 0-850 Hz. Bending stiffness of the samples is improved with MAO and EPD treatment. As a result, the sound transmission loss(LST) is improved in the stiffness control stage of the sound transmission verse frequency curve. To the samples by electrophoresis process, the LST is improved in frequency range from 2500-3200 Hz, because the damping loss factor is improved with EPD process. The results are useful for the surface treatment to enhance the damping loss factor, LST and widespread application of magnesium alloy while improving the corrosion resistance.展开更多
OBJECTIVE: To evaluate the clinical efficacy and safety of five phase music therapy in patients with depression after ischemic stroke.METHODS: A total of 92 patients with post-stroke depression were randomly divided i...OBJECTIVE: To evaluate the clinical efficacy and safety of five phase music therapy in patients with depression after ischemic stroke.METHODS: A total of 92 patients with post-stroke depression were randomly divided into the control group(32 cases), treatment group A(30 cases), and treatment group B(30 cases). All groups were given basic therapies for cerebral infarction. In addition,the control group was administerd 50 mg of oral sertraline hydrochloride daily, while treatment groups A and B received needling at Baihui(GV 20)plus acupoint injection at Yanglingquan(GB 34) daily; treatment group B also received music therapy derived from the five phases in Traditional ChineseMedicine theory twice daily. All treatments were administered for 5 d per treatment cycle for three cycles, with a 1 d interval between cycles. In all three groups, Hamilton's depression scale(HAMD-17)score and the activities of daily life(ADL) score were measured before and after treatment, and side effects were assessed with the treatment emergent symptom scale.RESULTS: The HAMD-17 score significantly decreased after treatment in all three groups, and the post-treatment reduction in HAMD-17 score was markedly greater in treatment group B than in treatment group A(P < 0.01). The ADL score significantly increased after treatment in all three groups,and the post-treatment increase in ADL score was significantly greater in treatment group B than in treatment group A(P < 0.01). The treatment emergent symptom scale score was highest in the control group, and lowest in group B, and significantly differed between the three groups(P < 0.01).CONCLUSION: Five phase music therapy plus acupoint needling and acupoint injection can improve the symptoms in patients with post-stroke depression.展开更多
Aircraft metal components and structures are susceptible to environmental degradation throughout their original design life and in many cases their extended lives.This paper summarizes the results of an experimental p...Aircraft metal components and structures are susceptible to environmental degradation throughout their original design life and in many cases their extended lives.This paper summarizes the results of an experimental program to evaluate the ability of Supersonic Particle Deposition(SPD),also known as cold spray,to extend the limit of validity(LOV)of aircraft structural components and to restore the structural integrity of corroded panels.In this study the potential for the SPD to seal the mechanically fastened joints and for this seal to remain intact even in the presence of multi-site damage(MSD)has been evaluated.By sealing the joint the onset of corrosion damage in the joint can be significantly retarded,possibly even eliminated,thereby dramatically extending the LOV of mechanically fastened joints.The study also shows that SPD can dramatically increase the damage tolerance of badly corroded wing skins.展开更多
The adsorption of phosphate onto ferrihydrite(FH) and two FH-humic acid(HA) complexes, obtained by co-precipitating FH with low(FH-HA1) and relatively high amounts of humic acid(FH-HA2), was studied through kinetics a...The adsorption of phosphate onto ferrihydrite(FH) and two FH-humic acid(HA) complexes, obtained by co-precipitating FH with low(FH-HA1) and relatively high amounts of humic acid(FH-HA2), was studied through kinetics and isotherm experiments to determine the differences in phosphate adsorption between FH-HA complexes and FH and to reveal the mechanisms of phosphate adsorption onto two soil compositions. The isoelectric point(IEP) and the specific surface area(SSA) of the mineral decreased as the particle porosity of the mineral increased, which corresponded to an increase in the amount of organic carbon. The adsorption capacity of phosphate was higher on FH than on FH-HA1 and FH-HA2 at the scale of micromoles per kilogram. The initial adsorption rate and adsorption affinity of phosphate decreased with an increase in the amount of HA in the mineral. The sensitivity of phosphate adsorption to the change in the pH was greater for FH than for FH-HA complexes. Ionic strength did not affect the adsorption of phosphate onto FH and FH-HA1 at a lower p H, and the increase in the ionic strength promoted phosphate adsorption at a higher p H.However, for the FH-HA2 complex, the increase in the ionic strength inhibited the adsorption of phosphate onto FH-HA2 at a lower p H and increased the adsorption at a higher pH.展开更多
基金Project(2011BAE22B05)supported by National Technology R&D Program in the 12th Five year Plan of ChinaProject(2011DFA50900)supported by the Canada-China-USA Collaborative Research&Development ProjectProject(51071121)supported by the National Natural Science Foundation of China
文摘Micro arc oxidation(MAO) and electrophoretic deposition(EPD) process are employed to fabricate a dense coating on magnesium alloy to protect it from corrosion in engineering application. The EPD film changes the damping characteristic of magnesium alloy, and both the MAO and EPD process change the bending stiffness of samples being treated. Damping loss factor(DLF) test and sound transmission experiments were carried out for AZ31 B magnesium alloy with coating fabricated by MAO and EPD processes. The results indicate that DLF is improved in frequency range from 0-850 Hz. Bending stiffness of the samples is improved with MAO and EPD treatment. As a result, the sound transmission loss(LST) is improved in the stiffness control stage of the sound transmission verse frequency curve. To the samples by electrophoresis process, the LST is improved in frequency range from 2500-3200 Hz, because the damping loss factor is improved with EPD process. The results are useful for the surface treatment to enhance the damping loss factor, LST and widespread application of magnesium alloy while improving the corrosion resistance.
基金Supported by State Administration of Traditional Chinese Medicine of the People's Republic of China,State Clinical Research Base of Traditional Chinese Medicine,The Second Batch of Professional Skill Scientific and Research Special Project(No.JDZX2015127)Jiangsu Natural Science Foundation Youth Project(No.BK20171070)Nanjing Scientific Development Planned Project(No.201402057)
文摘OBJECTIVE: To evaluate the clinical efficacy and safety of five phase music therapy in patients with depression after ischemic stroke.METHODS: A total of 92 patients with post-stroke depression were randomly divided into the control group(32 cases), treatment group A(30 cases), and treatment group B(30 cases). All groups were given basic therapies for cerebral infarction. In addition,the control group was administerd 50 mg of oral sertraline hydrochloride daily, while treatment groups A and B received needling at Baihui(GV 20)plus acupoint injection at Yanglingquan(GB 34) daily; treatment group B also received music therapy derived from the five phases in Traditional ChineseMedicine theory twice daily. All treatments were administered for 5 d per treatment cycle for three cycles, with a 1 d interval between cycles. In all three groups, Hamilton's depression scale(HAMD-17)score and the activities of daily life(ADL) score were measured before and after treatment, and side effects were assessed with the treatment emergent symptom scale.RESULTS: The HAMD-17 score significantly decreased after treatment in all three groups, and the post-treatment reduction in HAMD-17 score was markedly greater in treatment group B than in treatment group A(P < 0.01). The ADL score significantly increased after treatment in all three groups,and the post-treatment increase in ADL score was significantly greater in treatment group B than in treatment group A(P < 0.01). The treatment emergent symptom scale score was highest in the control group, and lowest in group B, and significantly differed between the three groups(P < 0.01).CONCLUSION: Five phase music therapy plus acupoint needling and acupoint injection can improve the symptoms in patients with post-stroke depression.
文摘Aircraft metal components and structures are susceptible to environmental degradation throughout their original design life and in many cases their extended lives.This paper summarizes the results of an experimental program to evaluate the ability of Supersonic Particle Deposition(SPD),also known as cold spray,to extend the limit of validity(LOV)of aircraft structural components and to restore the structural integrity of corroded panels.In this study the potential for the SPD to seal the mechanically fastened joints and for this seal to remain intact even in the presence of multi-site damage(MSD)has been evaluated.By sealing the joint the onset of corrosion damage in the joint can be significantly retarded,possibly even eliminated,thereby dramatically extending the LOV of mechanically fastened joints.The study also shows that SPD can dramatically increase the damage tolerance of badly corroded wing skins.
基金supported by the National Natural Science Foundation of China (Nos. 41071165 and 30890130)
文摘The adsorption of phosphate onto ferrihydrite(FH) and two FH-humic acid(HA) complexes, obtained by co-precipitating FH with low(FH-HA1) and relatively high amounts of humic acid(FH-HA2), was studied through kinetics and isotherm experiments to determine the differences in phosphate adsorption between FH-HA complexes and FH and to reveal the mechanisms of phosphate adsorption onto two soil compositions. The isoelectric point(IEP) and the specific surface area(SSA) of the mineral decreased as the particle porosity of the mineral increased, which corresponded to an increase in the amount of organic carbon. The adsorption capacity of phosphate was higher on FH than on FH-HA1 and FH-HA2 at the scale of micromoles per kilogram. The initial adsorption rate and adsorption affinity of phosphate decreased with an increase in the amount of HA in the mineral. The sensitivity of phosphate adsorption to the change in the pH was greater for FH than for FH-HA complexes. Ionic strength did not affect the adsorption of phosphate onto FH and FH-HA1 at a lower p H, and the increase in the ionic strength promoted phosphate adsorption at a higher p H.However, for the FH-HA2 complex, the increase in the ionic strength inhibited the adsorption of phosphate onto FH-HA2 at a lower p H and increased the adsorption at a higher pH.
