Infrared false target is an important mean to induce the infrared-guided weapons,and the key issue is how to keep the surface temperature of the infrared false target to be the same as that of the object to be protect...Infrared false target is an important mean to induce the infrared-guided weapons,and the key issue is how to keep the surface temperature of the infrared false target to be the same as that of the object to be protected.One-dimensional heat transfer models of a metal plate and imitative material were established to explore the influences of the thermophysical properties of imitative material on the surface temperature difference（STD） between the metal plate and imitative material which were subjected to periodical ambient conditions.It is elucidated that the STD is determined by the imitative material’s dimensionless thickness（dim*,） and the thermal inertia(Pim).When dim* is above 1.0,the STD is invariable as long as Pim is a constant.And if the dimensionless thickness of metal plate（d,m*） is also larger than 1.0,the STD approaches to zero as long as Pimis the same as the thermal inertia of metal plate（Pm）.When dim* is between 0.08 and 1,the STD varies irregularly with Pim and dim*.However,if dm* is also in the range of 0.08-1,the STD approaches to zero on condition that Pim=Pm and dim*= dm*.If dim*,is below 0.08,the STD is unchanged when Pimdim* is a constant.And if dm* is also less than 0.08,the STD approaches to zero as long as Pimdim* = Pmdm*.Furthermore,an applicationoriented discussion indicates that the imitative material can be both light and thin via the application of the phase change material with a preset STD because of its high specific heat capacity during the phase transition process.展开更多
According to the National Meeting on Power Construction and Cost Control held in Beijing on 26th August 1996, the target for power construction in the period of 9th Five- year Plan is set-up as follows:
目的探讨个性化针对性护理干预在老年慢性阻塞性肺疾病稳定期患者中的应用效果及对微小RNA-146a、微小RNA-146b的影响。方法选取2021年1月—2022年12月收治的80例老年慢性阻塞性肺疾病稳定期患者作为研究对象,按照组间基线资料可比的原...目的探讨个性化针对性护理干预在老年慢性阻塞性肺疾病稳定期患者中的应用效果及对微小RNA-146a、微小RNA-146b的影响。方法选取2021年1月—2022年12月收治的80例老年慢性阻塞性肺疾病稳定期患者作为研究对象,按照组间基线资料可比的原则将其分对照组和观察组,各40例。对照组接受常规护理,观察组在对照组基础上接受综合护理干预,比较两组患者负性情绪、肺功能指标、微小RNA-146a、微小RNA-146b、睡眠质量等。结果护理干预前,两组患者SAS、SDS评分比较差异无统计学意义(P>0.05);护理干预后,观察组SAS、SDS评分低于对照组,差异有统计学意义(P<0.05)。护理干预后,观察组用力肺活量(forced vital capacity,FVC)、第1秒用力呼气量(forced ecpiratory volume in the first second,FEV1)、FEV1/FVC高于对照组,差异有统计学意义(P<0.05);观察组患者情感负担、经济负担、照顾负担评分低于对照组,差异有统计学意义(P<0.05);观察组患者匹兹堡睡眠质量量表(Pittsburgh sleep quality scale,PSQI)低于对照组,差异有统计学意义(P<0.05);护理干预后,观察组患者miR-146a及miR-146b水平高于对照组,差异有统计学意义(P<0.05)。结论慢性阻塞性肺疾病稳定期患者接受综合护理干预,能让其保持积极心态接受诊治,降低其自我感受负担,改善肺功能,保持良好的睡眠质量。展开更多
基金funded by the National Natural Science Foundation of China (No. 51576188)
文摘Infrared false target is an important mean to induce the infrared-guided weapons,and the key issue is how to keep the surface temperature of the infrared false target to be the same as that of the object to be protected.One-dimensional heat transfer models of a metal plate and imitative material were established to explore the influences of the thermophysical properties of imitative material on the surface temperature difference（STD） between the metal plate and imitative material which were subjected to periodical ambient conditions.It is elucidated that the STD is determined by the imitative material’s dimensionless thickness（dim*,） and the thermal inertia(Pim).When dim* is above 1.0,the STD is invariable as long as Pim is a constant.And if the dimensionless thickness of metal plate（d,m*） is also larger than 1.0,the STD approaches to zero as long as Pimis the same as the thermal inertia of metal plate（Pm）.When dim* is between 0.08 and 1,the STD varies irregularly with Pim and dim*.However,if dm* is also in the range of 0.08-1,the STD approaches to zero on condition that Pim=Pm and dim*= dm*.If dim*,is below 0.08,the STD is unchanged when Pimdim* is a constant.And if dm* is also less than 0.08,the STD approaches to zero as long as Pimdim* = Pmdm*.Furthermore,an applicationoriented discussion indicates that the imitative material can be both light and thin via the application of the phase change material with a preset STD because of its high specific heat capacity during the phase transition process.
文摘According to the National Meeting on Power Construction and Cost Control held in Beijing on 26th August 1996, the target for power construction in the period of 9th Five- year Plan is set-up as follows:
文摘目的探讨个性化针对性护理干预在老年慢性阻塞性肺疾病稳定期患者中的应用效果及对微小RNA-146a、微小RNA-146b的影响。方法选取2021年1月—2022年12月收治的80例老年慢性阻塞性肺疾病稳定期患者作为研究对象,按照组间基线资料可比的原则将其分对照组和观察组,各40例。对照组接受常规护理,观察组在对照组基础上接受综合护理干预,比较两组患者负性情绪、肺功能指标、微小RNA-146a、微小RNA-146b、睡眠质量等。结果护理干预前,两组患者SAS、SDS评分比较差异无统计学意义(P>0.05);护理干预后,观察组SAS、SDS评分低于对照组,差异有统计学意义(P<0.05)。护理干预后,观察组用力肺活量(forced vital capacity,FVC)、第1秒用力呼气量(forced ecpiratory volume in the first second,FEV1)、FEV1/FVC高于对照组,差异有统计学意义(P<0.05);观察组患者情感负担、经济负担、照顾负担评分低于对照组,差异有统计学意义(P<0.05);观察组患者匹兹堡睡眠质量量表(Pittsburgh sleep quality scale,PSQI)低于对照组,差异有统计学意义(P<0.05);护理干预后,观察组患者miR-146a及miR-146b水平高于对照组,差异有统计学意义(P<0.05)。结论慢性阻塞性肺疾病稳定期患者接受综合护理干预,能让其保持积极心态接受诊治,降低其自我感受负担,改善肺功能,保持良好的睡眠质量。
