甲状腺影像报告和数据系统(thyroid imaging reporting and data system,TIRADS)规范了甲状腺结节的超声描述,有助于甲状腺良恶性结节的鉴别诊断;如果联合其他超声技术,则可以提高其诊断的准确性。本文对TIRADS发展史、临床应用价值、...甲状腺影像报告和数据系统(thyroid imaging reporting and data system,TIRADS)规范了甲状腺结节的超声描述,有助于甲状腺良恶性结节的鉴别诊断;如果联合其他超声技术,则可以提高其诊断的准确性。本文对TIRADS发展史、临床应用价值、局限性、与其他超声技术的联合应用进行综述。展开更多
The design guideline for the air suction drawing system with auxiliary air was analyzed,a spunbonding nonwoven system named PADHL1-3200 was designed and polypropylene(PP) spunbonded nonwoven fabrics with excellent pro...The design guideline for the air suction drawing system with auxiliary air was analyzed,a spunbonding nonwoven system named PADHL1-3200 was designed and polypropylene(PP) spunbonded nonwoven fabrics with excellent properties were achieved after many trial runs.On the other hand,the suction air velocity(VA) was calculated and the influence of VA on the bonding strengh of PP nonwoven fabrics was studied as well.It was found that VA is 1.5-2.5 times of the spinning velocity.With the increase of VA,PP fibers become finer and the bonding strength of PP nonwoven fabrics increases as well.展开更多
文摘甲状腺影像报告和数据系统(thyroid imaging reporting and data system,TIRADS)规范了甲状腺结节的超声描述,有助于甲状腺良恶性结节的鉴别诊断;如果联合其他超声技术,则可以提高其诊断的准确性。本文对TIRADS发展史、临床应用价值、局限性、与其他超声技术的联合应用进行综述。
文摘The design guideline for the air suction drawing system with auxiliary air was analyzed,a spunbonding nonwoven system named PADHL1-3200 was designed and polypropylene(PP) spunbonded nonwoven fabrics with excellent properties were achieved after many trial runs.On the other hand,the suction air velocity(VA) was calculated and the influence of VA on the bonding strengh of PP nonwoven fabrics was studied as well.It was found that VA is 1.5-2.5 times of the spinning velocity.With the increase of VA,PP fibers become finer and the bonding strength of PP nonwoven fabrics increases as well.
