The oxidation induration and reduction swelling behavior of chromium-bearing vanadium titanomagnetite pellets(CVTP)with Cr2O3 addition were studied,and the reduction swelling index(RSI)and compressive strength(CS)of t...The oxidation induration and reduction swelling behavior of chromium-bearing vanadium titanomagnetite pellets(CVTP)with Cr2O3 addition were studied,and the reduction swelling index(RSI)and compressive strength(CS)of the reduced CVTP with simulated coke oven gas(COG)injection were investigated.The results showed that the CS of the CVTP decreases and the porosity of the CVTP increases with increasing amount of Cr2O3 added.The Cr2O3 mainly exists in the form of(Cr,Fe)2O3 solid solution in the CVTP and as Fe-Cr in the reduced CVTP.The CS of the reduced CVTP increases and the RSI of the reduced CVTP decreases with increasing amount of Cr2O3 added.The limited aggregation and diffusion of metallic iron contribute to the formation of dense lamellar crystals,which leads to the slight decrease for reduction swelling behavior of reduced CVTP.This work provides a theoretical and technical basis for the utilization of CVTP and other Cr-bearing ores such as chromite with COG recycling technology.展开更多
A case of “biker’s nodule” in an 80 year-old cyclist is reported. The “biker’s nodule” is caused by repeated microtrauma to the subcutaneous fatty tissue or collageneous tissue on the perineal region resulting i...A case of “biker’s nodule” in an 80 year-old cyclist is reported. The “biker’s nodule” is caused by repeated microtrauma to the subcutaneous fatty tissue or collageneous tissue on the perineal region resulting in a perineal nodular induration.展开更多
The objective of this paper is to optimize the parameters of pellet drying and preheating process in grate.A mathematical model of drying and preheating is developed,and is verified by the experiments.Further,the oper...The objective of this paper is to optimize the parameters of pellet drying and preheating process in grate.A mathematical model of drying and preheating is developed,and is verified by the experiments.Further,the operating parameters of wind temperature,wind speed,grate speed and bed depth etc.are investigated through the orthogonal method using the simulation results.And a relationship of drying,preheating effects and operating parameters is achieved.The results show that the optimization effect can be achieved in the given range when air velocity is about 3.0 m/s and temperature is about 300,500,800,and 1 100 in the updraft drying zone,downdraft drying zone,preheating Ⅰ zone,and preheating Ⅱ zone respectively.The work is help for saving energy and reducing emissions in pellet induration.展开更多
Since their popularization,genitourinary prosthetics have remained a gold-standard therapy for the treatment of erectile dysfunction and stress urinary incontinence and in cases of testicular loss or dysfunction.They ...Since their popularization,genitourinary prosthetics have remained a gold-standard therapy for the treatment of erectile dysfunction and stress urinary incontinence and in cases of testicular loss or dysfunction.They have also represented an area of significant innovation,which has contributed to excellent long-term outcomes.Given this history,the objective of the current review was to provide a 5-10-year outlook on anticipated trends and developments in the field of genitourinary prosthetics.To accomplish this objective,a PubMed and patent search was performed of topics relating to penile and testicular prostheses and urinary sphincters.In regard to penile prostheses,findings demonstrated several new concepts including temperature-sensitive alloys,automated pumps,devices designed specifically for neophalluses,and improved malleable designs.With artificial urinary sphincters,new concepts include the ability to add or remove fluid from an existing system,two-piece systems,and new mechanisms to occlude the urethra.For testicular prosthetics,future implementations may not only better replicate the feel of a biological testicle but also add endocrinological functions.Beyond device innovation,the future of prosthetics is also one of expanding geographic boundaries,which necessitates variable cost modeling and regulatory considerations.Surgical trends are also changing,with a greater emphasis on nonnarcotic,postoperative pain control,outpatient surgeries,and adjunctive techniques to lengthen the penis and address concomitant stress incontinence,among others.Concomitant with device and surgical changes,future considerations also include a greater need for education and training,particularly given the rapid expansion of sexual medicine into developing nations.展开更多
基金financially supported by the National Natural Science Foundation of China (Nos.51674084, 51174051, and 51574082)
文摘The oxidation induration and reduction swelling behavior of chromium-bearing vanadium titanomagnetite pellets(CVTP)with Cr2O3 addition were studied,and the reduction swelling index(RSI)and compressive strength(CS)of the reduced CVTP with simulated coke oven gas(COG)injection were investigated.The results showed that the CS of the CVTP decreases and the porosity of the CVTP increases with increasing amount of Cr2O3 added.The Cr2O3 mainly exists in the form of(Cr,Fe)2O3 solid solution in the CVTP and as Fe-Cr in the reduced CVTP.The CS of the reduced CVTP increases and the RSI of the reduced CVTP decreases with increasing amount of Cr2O3 added.The limited aggregation and diffusion of metallic iron contribute to the formation of dense lamellar crystals,which leads to the slight decrease for reduction swelling behavior of reduced CVTP.This work provides a theoretical and technical basis for the utilization of CVTP and other Cr-bearing ores such as chromite with COG recycling technology.
文摘A case of “biker’s nodule” in an 80 year-old cyclist is reported. The “biker’s nodule” is caused by repeated microtrauma to the subcutaneous fatty tissue or collageneous tissue on the perineal region resulting in a perineal nodular induration.
基金the National High Technology Research and Development Program(863) of China (No.2007AA05Z215)
文摘The objective of this paper is to optimize the parameters of pellet drying and preheating process in grate.A mathematical model of drying and preheating is developed,and is verified by the experiments.Further,the operating parameters of wind temperature,wind speed,grate speed and bed depth etc.are investigated through the orthogonal method using the simulation results.And a relationship of drying,preheating effects and operating parameters is achieved.The results show that the optimization effect can be achieved in the given range when air velocity is about 3.0 m/s and temperature is about 300,500,800,and 1 100 in the updraft drying zone,downdraft drying zone,preheating Ⅰ zone,and preheating Ⅱ zone respectively.The work is help for saving energy and reducing emissions in pellet induration.
文摘Since their popularization,genitourinary prosthetics have remained a gold-standard therapy for the treatment of erectile dysfunction and stress urinary incontinence and in cases of testicular loss or dysfunction.They have also represented an area of significant innovation,which has contributed to excellent long-term outcomes.Given this history,the objective of the current review was to provide a 5-10-year outlook on anticipated trends and developments in the field of genitourinary prosthetics.To accomplish this objective,a PubMed and patent search was performed of topics relating to penile and testicular prostheses and urinary sphincters.In regard to penile prostheses,findings demonstrated several new concepts including temperature-sensitive alloys,automated pumps,devices designed specifically for neophalluses,and improved malleable designs.With artificial urinary sphincters,new concepts include the ability to add or remove fluid from an existing system,two-piece systems,and new mechanisms to occlude the urethra.For testicular prosthetics,future implementations may not only better replicate the feel of a biological testicle but also add endocrinological functions.Beyond device innovation,the future of prosthetics is also one of expanding geographic boundaries,which necessitates variable cost modeling and regulatory considerations.Surgical trends are also changing,with a greater emphasis on nonnarcotic,postoperative pain control,outpatient surgeries,and adjunctive techniques to lengthen the penis and address concomitant stress incontinence,among others.Concomitant with device and surgical changes,future considerations also include a greater need for education and training,particularly given the rapid expansion of sexual medicine into developing nations.
