本文主要针对GB 4706.13-2014《家用和类似用途电器的安全制冷器具、冰淇淋机和制冰机的特殊要求》与IEC 60335-2-24:2020《Household and similar electrical appliances–Safety–Part 2-24:Particular requirements for refrigeratin...本文主要针对GB 4706.13-2014《家用和类似用途电器的安全制冷器具、冰淇淋机和制冰机的特殊要求》与IEC 60335-2-24:2020《Household and similar electrical appliances–Safety–Part 2-24:Particular requirements for refrigerating appliances,ice-cream appliances and ice-makers》在测试方法、判定依据的方面进行了对比,并通过案例分析对IEC 60335-2-24:2020标准中所修订的条款进行具体说明,供制冷行业相关企业产品设计人员和检测机构测试人员参考。展开更多
BACKGROUND Gastric cancer is a kind of malignant tumor which is prevalent all over the world.Although some progress has been made in the treatment of gastric cancer,its prognosis is still not optimistic,so it is of gr...BACKGROUND Gastric cancer is a kind of malignant tumor which is prevalent all over the world.Although some progress has been made in the treatment of gastric cancer,its prognosis is still not optimistic,so it is of great significance to find reliable prog-nostic indicators to guide the treatment and management of patients with gastric cancer.AIM To explore the relationship between serum levels of five biomarkers[carcinoem-bryonic antigen(CEA),carbohydrate antigen(CA)19-9,CA72-4,CA24-2,and ferritin]and prognosis in patients with gastric cancer.METHODS This study included 200 patients with gastric adenocarcinoma,and conducted an in-depth analysis of their baseline characteristics,relationship between tumor markers and staging,and prognosis.The study found that CA19-9 has a signi-ficant correlation with tumor stage,the average levels of CA24-2,CEA,CA72-4 and ferritin were slightly increased disregarding the stage of tumor.Survival analysis showed that increases in CEA,CA19-9,CA24-2,and ferritin were all associated with shortened overall survival of patients.Further multivariate ana-lysis revealed that elevated serum CA72-4 levels were an inde-pendent adverse prognostic factor.RESULTS This study reveals that there is a significant correlation between the expression levels of serum tumor markers CEA,CA19-9,CA72-4,CA24-2 and ferritin in patients with gastric cancer and prognosis,and can be used as important indicators for prognostic evaluation of gastric cancer.In particular,markers that appear abnormally elevated initially may help identify gastric cancer patients with poor prognosis.CONCLUSION Serum CEA and CA19-9 play an important role in the prognosis assessment of gastric cancer,and are effective tools to guide clinical practice and optimize individualized treatment strategies for gastric cancer patients.展开更多
UL 60335-2-40(2019)标准应用于北美屋顶机产品的结构设计时,通过检查或试验来验证产品是否符合要求。文中介绍了标准的应用背景、使用原则,以及屋顶机的产品信息和结构设计适用的主要条款;对条款内容进行解读并提供应用案例和实施依据...UL 60335-2-40(2019)标准应用于北美屋顶机产品的结构设计时,通过检查或试验来验证产品是否符合要求。文中介绍了标准的应用背景、使用原则,以及屋顶机的产品信息和结构设计适用的主要条款;对条款内容进行解读并提供应用案例和实施依据。实践表明:1)应用标准时需要根据验证对象对内容进行筛选,选择适用的条款;2)制定试验计划要判断产品的最恶劣配置和合理的试验对象,考虑试验顺序和实施依据,并获得UL实验室的认可;3)结构验证服务于子系统的开发,有时需要电气等试验作为补充。展开更多
国际电工委员会于2008年颁布IEC 60335-2-7:2008(Ed7.0),Household and similar electrical appliances Safety Part 2-7:Particular requirements for washing machine,我国将该标准修改采用为国标GB 4706.24-2008《家用和类似用途的...国际电工委员会于2008年颁布IEC 60335-2-7:2008(Ed7.0),Household and similar electrical appliances Safety Part 2-7:Particular requirements for washing machine,我国将该标准修改采用为国标GB 4706.24-2008《家用和类似用途的安全洗衣机的特殊要求》。后续,国际电工委在2011年和2016年分别颁布了该版本的A1和A2增补件。本文探讨和比较了最新版IEC 60335-2-7:2016和GB 4706.24-2008的主要差异。展开更多
文摘本文主要针对GB 4706.13-2014《家用和类似用途电器的安全制冷器具、冰淇淋机和制冰机的特殊要求》与IEC 60335-2-24:2020《Household and similar electrical appliances–Safety–Part 2-24:Particular requirements for refrigerating appliances,ice-cream appliances and ice-makers》在测试方法、判定依据的方面进行了对比,并通过案例分析对IEC 60335-2-24:2020标准中所修订的条款进行具体说明,供制冷行业相关企业产品设计人员和检测机构测试人员参考。
文摘BACKGROUND Gastric cancer is a kind of malignant tumor which is prevalent all over the world.Although some progress has been made in the treatment of gastric cancer,its prognosis is still not optimistic,so it is of great significance to find reliable prog-nostic indicators to guide the treatment and management of patients with gastric cancer.AIM To explore the relationship between serum levels of five biomarkers[carcinoem-bryonic antigen(CEA),carbohydrate antigen(CA)19-9,CA72-4,CA24-2,and ferritin]and prognosis in patients with gastric cancer.METHODS This study included 200 patients with gastric adenocarcinoma,and conducted an in-depth analysis of their baseline characteristics,relationship between tumor markers and staging,and prognosis.The study found that CA19-9 has a signi-ficant correlation with tumor stage,the average levels of CA24-2,CEA,CA72-4 and ferritin were slightly increased disregarding the stage of tumor.Survival analysis showed that increases in CEA,CA19-9,CA24-2,and ferritin were all associated with shortened overall survival of patients.Further multivariate ana-lysis revealed that elevated serum CA72-4 levels were an inde-pendent adverse prognostic factor.RESULTS This study reveals that there is a significant correlation between the expression levels of serum tumor markers CEA,CA19-9,CA72-4,CA24-2 and ferritin in patients with gastric cancer and prognosis,and can be used as important indicators for prognostic evaluation of gastric cancer.In particular,markers that appear abnormally elevated initially may help identify gastric cancer patients with poor prognosis.CONCLUSION Serum CEA and CA19-9 play an important role in the prognosis assessment of gastric cancer,and are effective tools to guide clinical practice and optimize individualized treatment strategies for gastric cancer patients.
文摘国际电工委员会于2008年颁布IEC 60335-2-7:2008(Ed7.0),Household and similar electrical appliances Safety Part 2-7:Particular requirements for washing machine,我国将该标准修改采用为国标GB 4706.24-2008《家用和类似用途的安全洗衣机的特殊要求》。后续,国际电工委在2011年和2016年分别颁布了该版本的A1和A2增补件。本文探讨和比较了最新版IEC 60335-2-7:2016和GB 4706.24-2008的主要差异。
