简介:碳长丝束平行排列;;碳长丝束织物;;短切碳长丝束复合材料;;屏蔽效能选取碳长丝束平行排列复合片、碳长丝束织物和短切碳长丝束复合材料三种不同类型碳纤维集合体材料,测试其在0.05~2.0GHz内的电磁波屏蔽效能。结果表明,碳长丝束平行排列束间距越小,屏蔽效能越高,在所测频率范围内,其在两端屏蔽效能值较高,中端较差;碳长丝束织物密度越大,屏蔽效能值越高,碳长丝束针织物在1.1~2.0GHz内的屏蔽效能平均值为17.03dB,屏蔽效果优异;短切碳长丝束长度为10mm的复合材料屏蔽效果最佳,2mm次之,6mm最差,其在所测频率范围内屏蔽效能整体差异最小,但屏蔽效能值不高,10mm试样平均效能值为10.33dB。
简介:AIM:Tostudythedistributionofocularhigher-orderaberrations(HOAs)andmesopicpupilsizeinindividualsscreenedforrefractivesurgery.·METHODS:OcularHOAsandmesopicpupilsizewerestudiedin2458eyesof1240patientswithmyopia,myopicastigmatismandcompoundmyopicastigmatismand215eyesof110patientswithhyperopia,hyperopicastigmatismandcompoundhyperopicastigmatismusingtheZywaveaberrometer(Busch&Lomb).Allpatientshadcorrectablerefractiveerrorswithoutahistoryofrefractivesurgeryorunderlyingdiseases.Root-mean-squarevaluesofHOAs,totalsphericalaberration,totalcomaandmesopicpupilsizewereanalyzed.OcularHOAsweremeasuredacrossa≥6.0mmpupil,andpupilsizemeasurementswereperformedunderthemesopiccondition.·RESULTS:ThemeanvaluesofHOAs,totalsphericalaberrationandtotalcomainthemyopicgroupwere0.369μm,±0.233,0.133±0.112μmand0.330±0.188μm,respectively.InthehyperopicgroupthemeanvaluesofHOAs,totalsphericalaberrationandtotalcomawere0.418μm±0.214,0.202±0.209μmand0.343±0.201μm,respectively.HyperopesshowedgreatertotalHOAs(P<0.01)andtotalsphericalaberration(P<0.01)comparedtomyopes.Inage-matchedanalysis,onlytheamountoftotalsphericalaberrationwashigherinthehyperopicgroup(P=0.05).Mesopicpupilsizeinthemyopicgroupwaslarger(P≤0.05).·CONCLUSION:TheresultssuggestedthatsignificantlevelsofHOAswerefoundinbothgroupswhichareimportantforplanningrefractivesurgeriesonIranians.Thereweresignificantlyhigherlevelsoftotalsphericalaberrationinhyperopescomparedtomyopes.Mesopicpupilsizewaslargerinmyopicgroup.
简介:摘要目的比较卵巢上皮细胞癌应用TP方案和PC方案的效果。方法选择我院2003年6月-2007年6月62例卵巢上皮细胞癌患者随机分为两组,TP组31例患者采用TP(紫杉醇+顺铂)方案,PC组31例患者采用PC(顺铂+环磷酰胺)方案,所有患者均随访6-60个月,比较两种方案的效果。结果比较两组患者近期效果,TP组完全缓解12例,部分缓解13例,总有效率为80.65%;PC组完全缓解6例,部分缓解9例,总有效率为48.39%;比较两组远期疗效,TP组1、2、3、5年生存率分别为61.29%、45.16%、29.03%、12.9%,PC组1、2、3、5年生存率分别为48.39%、29.03%、16.13%、0,两组比较差异具有显著性,有统计学意义P<0.05。两组毒副反应主要表现为白细胞下降、骨骼抑制、恶心、呕吐等消化道反应及神经毒性等,两组不良反应比较差异无显著性,无统计学意义P>0.05。结论TP方案无论近期效果及远期疗效均优于PC方案,且不会增加毒副反应,可作为卵巢上皮细胞癌术后化疗的首选。
简介:内容摘要本文通过对异形墩施工时从测量放样、钢筋制作绑扎、模板吊装加固、混凝土浇筑、拆模养生等施工工序和质量保证措施的阐述,对同类型的桥墩施工有一定的借鉴意义。