In order to study the effects of wet compression on a transonic compressor,a full 3-D steady numerical simulation was carried out under varying conditions.Different injected water flow rates and droplet diameters were...In order to study the effects of wet compression on a transonic compressor,a full 3-D steady numerical simulation was carried out under varying conditions.Different injected water flow rates and droplet diameters were considered.The effect of wet compression on the shock,separated flow,pressure ratio,and efficiency was investigated.Additionally,the effect of wet compression on the tip clearance when the compressor runs in the near-stall and stall situations was emphasized.Analysis of the results shows that the range of stable operation is extended,and that the pressure ratio and inlet air flow rate are also increased at the near-stall point.In addition,it seems that there is an optimum size of the droplet diameter.展开更多
Objective To observe the clinical efficacy and safety of WenYang HuoXue Washing Prescription （WYHX） in the treatment of upper limb edema after breast cancer surgery. Methods： Seventy-eight patients with upper ext...Objective To observe the clinical efficacy and safety of WenYang HuoXue Washing Prescription （WYHX） in the treatment of upper limb edema after breast cancer surgery. Methods： Seventy-eight patients with upper extremity edema after operation of breast cancer with Yin Syndrome were given wet compress with prescription and nursing guidance. The symptom score of affected extremity was observed before and 14 days after treatment, and the total effective rate was evaluated. Results： Twenty-three cases were markedly effective, 41 cases were effective and 14 cases were Invalid. The total effective rate was 82.1%. There was no significant difference between the two groups according to stage I and stage II of edema （P 〉 0.05）. Conclusion： WYHX can effectively improve the discomfort symptoms of upper limb edema and cold after breast cancer surgery, and is worthy of clinical application.展开更多
The objective of this investigation is to study the effect of methods of preparation and concentration of gum on the compressional and mechanical properties of Okra gum matrix. The compressional behavior of Okra gum m...The objective of this investigation is to study the effect of methods of preparation and concentration of gum on the compressional and mechanical properties of Okra gum matrix. The compressional behavior of Okra gum matrices prepared by direct compression and wet granulations is analyzed using density measurements, Heckel and Kawakita analysis while the mechanical properties of the formulations were assessed using crushing strength (CS) and friability (FR) as well as CSFR ratio. Formulations prepared by direct compression had lower Pk values than those prepared by wet granulation while there was no significant difference between Py values of formulations prepared by direct compression and wet granulations. Therefore, formulations prepared by direct compression underwent plastic deformation more easily and rapidly than those prepared by wet granulation. The results show that DB values increased with decrease in concentration of the gum and granules undergo higher degree of fragmentation than powders. Formulations containing 90% w/w Okra gum exhibited the highest amount of total plastic deformation and gave the best packing. Tablets prepared by direct compression showed lower bond strength and higher friability values than those prepared by wet granulations. The crushing strength generally decreases with a decrease in the concentration of the gum while there was an inverse relationship between friability and gum concentration. CSFR decreases with a decrease in gum concentration and tablets prepared by wet granulations showed significantly higher values of CSFR展开更多
Objective: to explore the maintenance methods and effects of autologous arteriovenous fistula (AVF) in maintenance hemodialysis patients. Methods: the hospital admission time was set as February 2019 to November 2020....Objective: to explore the maintenance methods and effects of autologous arteriovenous fistula (AVF) in maintenance hemodialysis patients. Methods: the hospital admission time was set as February 2019 to November 2020. The study object was selected as 60 patients who underwent AVF puncture to maintain hemodialysis. They were randomly divided into 30 patients in each group. The control group was treated with Hirudoid external application, while the experimental group was treated with far infrared radiation combined with papaya wine wet application. The changes of AVF diameter, AVF flow, dialysis blood flow, arterial pressure and venous pressure levels, incidence of hypertension during dialysis, incidence of hypotension during dialysis, von Willebrand factor (vWF factor) and dialysis adequacy assessment (spKt/V), hematoma absorption time, incidence of short-term complications and long-term complications, and treatment satisfaction were observed before and after treatment. Results: before treatment, there was no significant difference in AVF diameter, AVF flow, dialysis blood flow, arterial pressure and venous pressure between the two groups (P > 0.05). After treatment, the AVF flow and dialysis blood flow of the experimental group were significantly increased, and the AVF diameter was significantly wider. At the same time, the incidence of hypertension and hypotension during dialysis in the experimental group were significantly less, the vWF factor, the incidence of recent complications and the incidence of long-term complications were significantly reduced, the spKt/V was significantly increased, the hematoma absorption time was significantly shorter, and the treatment satisfaction was significantly higher in the experimental group. The difference between the two groups was significant (P < 0.05). There was no significant difference in arterial pressure and venous pressure between the two groups after treatment (P>0.05). Conclusion: far infrared irradiation combined with wet compress of papaya wine has a good maintenance effect on arteriovenous fistula in patients with maintenance hemodialysis. It can not only improve treatment satisfaction, spKt/V, increase AVF flow and dialysis blood flow, reduce the incidence of hypertension and hypotension during dialysis, but also reduce vWF factor, the incidence of short-term complications and long-term complications, shorten hematoma absorption time and widen AVF diameter.展开更多
Molecular dynamics （MD） simulations of the consecutive compression-decompression cycles ot hexagonal zinc sulfide （wurtzite） nanoparticles predict an irreversible phase transformation to the cubic polymorph.The ph...Molecular dynamics （MD） simulations of the consecutive compression-decompression cycles ot hexagonal zinc sulfide （wurtzite） nanoparticles predict an irreversible phase transformation to the cubic polymorph.The phase transformation commences at the contact area between the particle and the inden- ter and proceeds with the number of compression cycles. Dislocations are visible for a particle size above 5nm. Results from wet grinding and dry powder compression experiments on a commercial wurtzite pigment agree qualitatively with MD simulation predictions. X-ray diffraction patterns reveal that the amount of cubic polymorph in the compressed samples increases with pressure applied to the powder. In comparison with powder compression, wet milling leads to a more pronounced phase transformation. This occurs because the particles are exposed to a large number of stress events by collision with the grinding media, which leads to the formation of defects and new surface crystallites by particle fracture. According to the MD simulations, phase transformation is expected to occur preferentially in surface crystallites because they experience the highest mechanical load. Because of the phase transformation, the wet ground and compressed samples exhibit a lower photo- luminescence intensity than the feed material. In comparison with powder compression, milling reduces the photoluminescence intensity more substantially. This occurs because a higher defect concentration is formed. The defects contribute to the phase transformation and photoluminescence quenching.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No.50776021
文摘In order to study the effects of wet compression on a transonic compressor,a full 3-D steady numerical simulation was carried out under varying conditions.Different injected water flow rates and droplet diameters were considered.The effect of wet compression on the shock,separated flow,pressure ratio,and efficiency was investigated.Additionally,the effect of wet compression on the tip clearance when the compressor runs in the near-stall and stall situations was emphasized.Analysis of the results shows that the range of stable operation is extended,and that the pressure ratio and inlet air flow rate are also increased at the near-stall point.In addition,it seems that there is an optimum size of the droplet diameter.
文摘Objective To observe the clinical efficacy and safety of WenYang HuoXue Washing Prescription （WYHX） in the treatment of upper limb edema after breast cancer surgery. Methods： Seventy-eight patients with upper extremity edema after operation of breast cancer with Yin Syndrome were given wet compress with prescription and nursing guidance. The symptom score of affected extremity was observed before and 14 days after treatment, and the total effective rate was evaluated. Results： Twenty-three cases were markedly effective, 41 cases were effective and 14 cases were Invalid. The total effective rate was 82.1%. There was no significant difference between the two groups according to stage I and stage II of edema （P 〉 0.05）. Conclusion： WYHX can effectively improve the discomfort symptoms of upper limb edema and cold after breast cancer surgery, and is worthy of clinical application.
文摘The objective of this investigation is to study the effect of methods of preparation and concentration of gum on the compressional and mechanical properties of Okra gum matrix. The compressional behavior of Okra gum matrices prepared by direct compression and wet granulations is analyzed using density measurements, Heckel and Kawakita analysis while the mechanical properties of the formulations were assessed using crushing strength (CS) and friability (FR) as well as CSFR ratio. Formulations prepared by direct compression had lower Pk values than those prepared by wet granulation while there was no significant difference between Py values of formulations prepared by direct compression and wet granulations. Therefore, formulations prepared by direct compression underwent plastic deformation more easily and rapidly than those prepared by wet granulation. The results show that DB values increased with decrease in concentration of the gum and granules undergo higher degree of fragmentation than powders. Formulations containing 90% w/w Okra gum exhibited the highest amount of total plastic deformation and gave the best packing. Tablets prepared by direct compression showed lower bond strength and higher friability values than those prepared by wet granulations. The crushing strength generally decreases with a decrease in the concentration of the gum while there was an inverse relationship between friability and gum concentration. CSFR decreases with a decrease in gum concentration and tablets prepared by wet granulations showed significantly higher values of CSFR
文摘Objective: to explore the maintenance methods and effects of autologous arteriovenous fistula (AVF) in maintenance hemodialysis patients. Methods: the hospital admission time was set as February 2019 to November 2020. The study object was selected as 60 patients who underwent AVF puncture to maintain hemodialysis. They were randomly divided into 30 patients in each group. The control group was treated with Hirudoid external application, while the experimental group was treated with far infrared radiation combined with papaya wine wet application. The changes of AVF diameter, AVF flow, dialysis blood flow, arterial pressure and venous pressure levels, incidence of hypertension during dialysis, incidence of hypotension during dialysis, von Willebrand factor (vWF factor) and dialysis adequacy assessment (spKt/V), hematoma absorption time, incidence of short-term complications and long-term complications, and treatment satisfaction were observed before and after treatment. Results: before treatment, there was no significant difference in AVF diameter, AVF flow, dialysis blood flow, arterial pressure and venous pressure between the two groups (P > 0.05). After treatment, the AVF flow and dialysis blood flow of the experimental group were significantly increased, and the AVF diameter was significantly wider. At the same time, the incidence of hypertension and hypotension during dialysis in the experimental group were significantly less, the vWF factor, the incidence of recent complications and the incidence of long-term complications were significantly reduced, the spKt/V was significantly increased, the hematoma absorption time was significantly shorter, and the treatment satisfaction was significantly higher in the experimental group. The difference between the two groups was significant (P < 0.05). There was no significant difference in arterial pressure and venous pressure between the two groups after treatment (P>0.05). Conclusion: far infrared irradiation combined with wet compress of papaya wine has a good maintenance effect on arteriovenous fistula in patients with maintenance hemodialysis. It can not only improve treatment satisfaction, spKt/V, increase AVF flow and dialysis blood flow, reduce the incidence of hypertension and hypotension during dialysis, but also reduce vWF factor, the incidence of short-term complications and long-term complications, shorten hematoma absorption time and widen AVF diameter.
基金supported financially by Arbeitsgemeinschaft industrieller Forschungsvereinigungen(AiF)(Grant No.:IGF333ZN)
文摘Molecular dynamics （MD） simulations of the consecutive compression-decompression cycles ot hexagonal zinc sulfide （wurtzite） nanoparticles predict an irreversible phase transformation to the cubic polymorph.The phase transformation commences at the contact area between the particle and the inden- ter and proceeds with the number of compression cycles. Dislocations are visible for a particle size above 5nm. Results from wet grinding and dry powder compression experiments on a commercial wurtzite pigment agree qualitatively with MD simulation predictions. X-ray diffraction patterns reveal that the amount of cubic polymorph in the compressed samples increases with pressure applied to the powder. In comparison with powder compression, wet milling leads to a more pronounced phase transformation. This occurs because the particles are exposed to a large number of stress events by collision with the grinding media, which leads to the formation of defects and new surface crystallites by particle fracture. According to the MD simulations, phase transformation is expected to occur preferentially in surface crystallites because they experience the highest mechanical load. Because of the phase transformation, the wet ground and compressed samples exhibit a lower photo- luminescence intensity than the feed material. In comparison with powder compression, milling reduces the photoluminescence intensity more substantially. This occurs because a higher defect concentration is formed. The defects contribute to the phase transformation and photoluminescence quenching.
