基于系统输出分布的智能控制

提出了文题所述的控制策略,依据输出分布曲线的特征变量选取方法和依据该项信息的规则控制系统。仿真研究得到了满意的结果。在一个实验性二元精馏塔上用IBM-PC进行试验亦获成功。本法对具有非线性特性的分布参数对象,较常规控制策略有明显的优越性。     

连续消毒对水中大肠杆菌抗力曩探讨

Under defined conditions E. coli were subjected to repeated chlorine disinfections 10 times. The survival E. coli at 30 s (A10), and the survival E. coli at 10 min (B10) had no difference in resistance to chlorine to their original strain (A0). However, the compound E. coli (C10) survived at various contact time showed an increased resistance than their original strain (A10), the degree of increased resistance varying with different conditions of disinfection. E. coli C1(0) lost its increased resistance after it has been passaged 10 times on nutrient agar.     

Spectral slope of vowels produced by tracheoesophageal speakers

Spectra of vowels were analyzed to determine whether differences exist between the spectral slope of vowels produced by tracheoesophageal (TE) speakers and normal speakers and, if so, to quantify such differences. The linear predictive autocorrelation method was used to calculate smoothed spectra and the spectra were normalized with respect to a low frequency component. Comparisons between normalized spectral energy within a selected high frequency range revealed that energy within this frequency range for vowels produced by TE speakers was significantly higher than that produced by normal speakers. A least-square distance matching procedure was used to quantify speaker group differences in the spectral slope of vowels. Average spectra of vowels produced by the normal speakers could be matched to average spectra of vowels produced by the TE speakers by decreasing the spectral slope of their vowels by 2-3 dB/octave.     

小剂量氯化汞对小鼠脂质过氧化物的影响

本观察小剂量１ｍｇ／ｋｇ）ＨｇＣｌ２对小鼠肝，脑组织中脂质过氧化物（ＬＰＯ）的影响，发现小剂量ＨｇＣｌ２可使肝组织中ＬＰＯ含量明显增高，与对照组比，差异有显性（Ｐ〈０．０２５），而脑组织中ＬＰＯ含量未见明显影响（Ｐ〉０．０５）。     

纤维组织粘合剂的实验研究

本文应用“冷沉淀”法制备纤维组织粘合剂。对纤维组织粘合剂中主要成份和含量进行了测定,并测定了主要理化性质,建立了动物实验模型,观察了实验兔对纤维粘合剂的反应。     

贯彻"三个代表"思想创建一流总医院

本文阐述了以“三个代表”思想为指导，从科技强院，文化兴院和质量建院三个方面加强全面建设的经验，为全面提高军队医院建设提供参考。     

Potential contribution of nuclear factor-kappaB to cerebral vasospasm after experimental subarachnoid hemorrhage in rabbits.

Nuclear factor-kappaB (NF-kappaB) plays a key role in inflammation, which is involved in the development of cerebral vasospasm after subarachnoid hemorrhage (SAH). In the present study, we assessed the potential role of NF-kappaB in regulation of cerebral vasospasm. Nuclear factor-kappaB DNA-binding activity was measured in cultured vascular smooth muscle cells (VSMCs) treated with hemolysate and pyrrolidine dithiocarbamate (PDTC, 80 micromol/L), an inhibitor of NF-kappaB. Forty-two rabbits were divided into three groups: control, SAH, and PDTC groups (n=14 for each group). The caliber of the basilar artery was evaluated. Nuclear factor-kappaB DNA-binding activity and the gene expression levels of cytokines and adhesion molecules in the basilar artery were measured. Immunohistochemical study was performed to assess the expression and localization of tumor necrosis factor (TNF)-alpha, intercellular adhesion molecule (ICAM)-1, and myeloperoxidase (MPO). It was observed that NF-kappaB DNA-binding activity was significantly increased by treatment with hemolysate in cultured VSCMs, but this increase was suppressed by pretreatment with PDTC. Severe vasospasm was observed in the SAH group, which was attenuated in the PDTC group. Subarachnoid hemorrhage could induce increases of NF-kappaB DNA-binding activity and the gene expression levels of TNF-alpha, interleukin (IL)-1 beta, ICAM-1, and vascular cell adhesion molecule (VCAM)-1, which were reduced in the PDTC group. Immunohistochemical study demonstrated that the expression levels of TNF-alpha, ICAM-1, and MPO were all increased in the SAH group, but these increases were attenuated in the PDTC group. Our results suggest that NF-kappaB is activated in the arterial wall after SAH, which potentially leads to vasospasm development through induction of inflammatory response.     

梅花髓内针和交锁髓内钉治疗股骨干骨折的比较

目的 :比较梅花髓内针和交锁髓内钉治疗股骨干骨折的疗效。方法 :采用梅花针和交锁髓内钉内固定治疗股骨干骨折共 70例 ,比较两组的固定方法、术后处理、愈合时间、肢体与关节功能恢复情况、适应症的选择以及交锁髓内钉的应用体会。结果 :随访 10月～ 2 4月 ,骨折全部愈合 ,梅花针组 4 7例 ,平均愈合时间 7.5个月 ;交锁髓内钉组平均愈合时间 6 .5个月。肢体关节功能恢复 :梅花针组术后肢体成角畸形 15°2例 ,占 4 % ;膝关节活动 <70°3例 ,占 6 %。交锁髓内钉组 ,无成角畸形 ,膝关节活动均恢复正常。结论 :梅花髓内针最好的适应症是股骨干峡部的短斜或横行新鲜骨折 ;交锁髓内钉适应症较广泛 ,可用于所有的股骨干新鲜和陈旧性骨折 ,愈合时间较梅花针短 ,功能恢复良好 ,疗效明显优于梅花髓内针。