The present invention provides a method for recycling of the waste silicasand used in casting and for recycling of coal provided together with wastesilica sand. Waste silica sand may comprise dirt such as coal powder,...The present invention provides a method for recycling of the waste silicasand used in casting and for recycling of coal provided together with wastesilica sand. Waste silica sand may comprise dirt such as coal powder,bentonite and resin as a result of metal casting process. The recyclingmethod for waste casting sand can be applied manually or automatically,and in general, the method comprises a water alkalizing step to be usedin washing。展开更多
With the aid of patent life cycle theory,and from the perspective of patent life span,this paper choose the ‘times of citation-time sequence'data of patents as an observation index to research on related patents ...With the aid of patent life cycle theory,and from the perspective of patent life span,this paper choose the ‘times of citation-time sequence'data of patents as an observation index to research on related patents in the field of wireless charging by applying the adjusted ‘double-proportion'obsolescence method. The research reveals the rules of patent life span in the field of wireless charging,finding that the first 5 years since patents were authorized is the core period for the patents to play their full value,and also discovers the development law of merging technology patents.展开更多
探讨不同激发方式在右心声学造影(agitated saline contrast echocardiography,ASCE)诊断卵圆孔未闭(patent foramen ovale,PFO)合并右向左分流(right to left shunt,RLS)中的作用。纳入2023年1月—2024年6月于川北医学院附属医院心内...探讨不同激发方式在右心声学造影(agitated saline contrast echocardiography,ASCE)诊断卵圆孔未闭(patent foramen ovale,PFO)合并右向左分流(right to left shunt,RLS)中的作用。纳入2023年1月—2024年6月于川北医学院附属医院心内科就诊的328例疑似PFO患者,采用咳嗽、改良蹲立动作、束臂试验及联合激发,以经食管超声(TEE)为金标准,比较不同方式的诊断效能。结果显示,束臂试验对中-大量RLS的检出率(45.8%)高于咳嗽(28.9%)和改良蹲立动作(35.4%);二阶法中咳嗽+束臂试验的检出率最高(52.1%),三阶法的检出率(54.3%)未显著提升但稳定性更佳;束臂试验及三阶法的AUC分别为0.842和0.891,显著优于单一激发。研究发现,束臂试验及联合激发可提高PFO-RLS检出率,推荐将其作为个体化联合方案以优化诊断效能。展开更多
文摘The present invention provides a method for recycling of the waste silicasand used in casting and for recycling of coal provided together with wastesilica sand. Waste silica sand may comprise dirt such as coal powder,bentonite and resin as a result of metal casting process. The recyclingmethod for waste casting sand can be applied manually or automatically,and in general, the method comprises a water alkalizing step to be usedin washing。
基金Supported by the National Social Science Foundation of China(No.12CTQ025)
文摘With the aid of patent life cycle theory,and from the perspective of patent life span,this paper choose the ‘times of citation-time sequence'data of patents as an observation index to research on related patents in the field of wireless charging by applying the adjusted ‘double-proportion'obsolescence method. The research reveals the rules of patent life span in the field of wireless charging,finding that the first 5 years since patents were authorized is the core period for the patents to play their full value,and also discovers the development law of merging technology patents.
文摘探讨不同激发方式在右心声学造影(agitated saline contrast echocardiography,ASCE)诊断卵圆孔未闭(patent foramen ovale,PFO)合并右向左分流(right to left shunt,RLS)中的作用。纳入2023年1月—2024年6月于川北医学院附属医院心内科就诊的328例疑似PFO患者,采用咳嗽、改良蹲立动作、束臂试验及联合激发,以经食管超声(TEE)为金标准,比较不同方式的诊断效能。结果显示,束臂试验对中-大量RLS的检出率(45.8%)高于咳嗽(28.9%)和改良蹲立动作(35.4%);二阶法中咳嗽+束臂试验的检出率最高(52.1%),三阶法的检出率(54.3%)未显著提升但稳定性更佳;束臂试验及三阶法的AUC分别为0.842和0.891,显著优于单一激发。研究发现,束臂试验及联合激发可提高PFO-RLS检出率,推荐将其作为个体化联合方案以优化诊断效能。
