有限精度时间自动机的可达性检测

为了缓解状态空间爆炸问题,减小模型检测过程中生成的状态空间,加快模型检测速度,引入有限精度时间自动机(finite precision timed automata,简称FPTA)作为实时系统的形式模型,并提出了一种数据结构SDS(series of delay sequence)符号化表示状态空间中的状态集.FPTA只记录时钟变量的整数值及时钟变化的先后次序,从而减小生成的状态空间.在一定的时间约束下,Alur与Dill提出的时间自动机的可达性检测可简化为FPTA的可达性检测.举例描述了状态空间的生成过程和表示方法.最后,列出部分初步的实验结果,分析了SDS的特点及不足.     

Giant-cell interstitial pneumonia in a gas station worker

Giant-cell interstitial Pneumonia (GIP) is a very uncommon respiratory disease. The majority of cases of GIP are caused by exposure to cobalt, tungsten and other hard metals. In this report, we describe GIP in a patient who worked in gas station and dealt in propane gas vessels. He presented with clinical features of chronic interstitial lung disease and underwent an open lung biopsy that showed DIP-like reaction with large numbers of intra-alveolar macrophages and numerous large, multinucleated histiocytes which were admixed with the macrophages. Analysis of lung tissue for hard metals was done. Cobalt was the main component of detected hard metals. Corticosteroid therapy was started and he recovered fully.     

Effect of bushenhuoxue tablet on serum lipid peroxide, blood lipid and blood sugar in type II diabetics

Sixty-eight patients suffering from diabetes mellitus (DM) type II with Kidney Deficiency and blood stasis were enrolled and divided randomly into treatment group (34 cases) and placebo group (34 healthy subjects). The amount of serum lipid peroxide (LPO), blood lipid and blood sugar was determined. The results showed that the serum LPO in treatment group was higher than that in placebo group. The serum LPO increased significantly in DM patients with vascular disease or with uncontrolled blood sugar. The serum LPO was positively correlated with triglyceride (TG). After using Bushenhuoxue Tablet (BSHX) serum LPO lowered, blood sugar decreased and high density lipoprotein-cholesterol (HDL-C)increased in treatment group, but in placebo group these three parameters were not changed significantly. These results indicated that LPO reaction in type II DM patients increased. The higher the blood sugar and TG or complicated with vascular disease, the LPO reaction enhanced markedly. BSHX tablets have the function of reducing the serum LPO and blood sugar, clearing cholesterol. Therefore, this tablet will have a good prospect in the prevention and treatment for DM patients complicated with vascular disease.