简介:BystudyingthespectralpropertiesoftheunderlyingoperatorcorrespondingtotheM/G/1queueingmodelwithoptionalsecondserviceweobtainthatthetime-dependentsolutionofthemodelstronglyconvergestoitssteady-statesolution.Wealsoshowthatthetime-dependentqueueingsizeatthedeparturepointconvergestothecorrespondingsteadystatequeueingsizeatthedeparturepoint.
简介:摘要目的探讨了血清半胱氨酸蛋白霉抑制剂C(cystatinc,Cysc)、α1微球蛋白(α1-microglobulin,α1-m)和视黄醇结合蛋白(retinolbindingprotein,RBP)联检对原发性高血压患者肾损害早期的临床价值。方法选择96例原发性高血压患者,其中60例无肾病,36例伴高血压肾病,采用乳胶颗粒增强免疫比浊法检测血清Cysc,酶联法检测α1-m,免疫透射比浊法检测血清RBP,并与35名正常健康人作比较。结果患者血清Cysc、α1-m和RBP水平均非常显著地高于正常人组(p<0.01),联检Cysc、α1-m和RBP的阳性率明显高于单项。结论血清Cysc、α1-m和RBP是原发性高血压患者早期肾损害的良好指标,联检可提供较新的概念,有助于对患者肾脏损伤的早期诊断和疗效观察。