慢加急性肝衰竭不同转归患者体温变化特点及护理对策

目的:明确慢加急性肝衰竭不同转归患者体温变化特点,并制定相应的护理对策。方法:收集11例慢加急性肝衰竭患者,死亡患者5例,出院患者6例,采用重复测量方差分析比较不同转归患者体温随住院时间的特点。结果:在住院第8天左右,死亡组患者体温升高,与出院患者比较差异有统计学意义(F=17.451,P0.05)。护理对策:要进一步提高护理级别,加强基础护理,严格执行无菌操作,将陪护人员作为预防感染宣教对象。     

区域科技创新能力评价体系构建及综合评价实证研究

通过采用层次分析的方法构建出了区域科技创新能力评价体系,对评价体系中各指标进行了深入分析,利用灰色关联度评价理论建立起区域科技创新能力评价模型,并以佛山市为样本,对其科技创新能力进行了综合评价,根据评价结果对佛山市科技创新能力现状进行深入分析,提出了一些对策性建议。     

隧道锚碇围岩稳定分析及破坏模式研究

锚碇围岩稳定性及破坏模式研究是确定系统极限承载力的基础。基于现场地质资料的数值仿真计算与现场缩尺模型试验对比分析,被认为是一种比较理想的研究思路。通过FLAC3D计算发现,在设计荷载下,围岩的应力场和位移场具有明显的分区特征,在锚体空腔和结构拐角处常出现应力集中和大变形区,系统整体未形成连贯的破坏区,出现的局部破损区主要集中在锚体后部右上角等5个部位。超载数值试验发现,破坏并不是简单的沿锚体和岩体的边界发生滑移,而是带动周边岩体发生倒塞型的整体拉剪复合破坏。现场模型试验结果与数值计算结果吻合较好。施工及运营过程中应对易破坏区进行重点加固处理。     

单片机技术在铁路移频自动闭塞设备中的应用

为改变传统移频自动闭塞系统存在技术落后、信息量少、可靠性差,不能满足现代运输生产的发展需求状况,应用先进的单片机技术,可编程逻辑芯片(FPGA)和高性能CPU,通过逻辑结构设计和时序控制,实现了移频自动闭塞设备的集成化、通用化,大幅度提高了列车运行的可靠性,并为实现机车信号主体化创造了条件。     

心衰康煎液对阿霉素心衰模型大鼠心肌的影响

目的观察中药复方制剂心衰康煎液对心衰大鼠心脏血流动力学的影响及心肌细胞的病理学改变.方法利用pclab实验记录分析系统观察和分析各实验组大鼠左心室内压、对大鼠心肌切片H.E染色镜下观察.结果心衰康使心衰得到明显改善,心肌细胞无明显变性、坏死.结论中药复方心衰康煎液对心衰大鼠的心肌病变有明显改善,从而产生良好的抗心衰作用.结论     

Stochastic optimal control of first-passage failure for rectangular thin plate vibration model under gaussian white-noise excitations

A rectangular thin plate vibration model subjected to inplane stochastic excitation is simplified to a quasinonintegrable Hamiltonian system with two degrees of freedom. Subsequently a one-dimensional Ito? stochastic differential equation for the system is obtained by applying the stochastic averaging method for quasi-nonintegrable Hamiltonian systems. The conditional reliability function and conditional probability density are both gained by solving the backward Kolmogorov equation numerically. Finally, a stochastic optimal control model is proposed and solved. The numerical results show the effectiveness of this method.     

水工结构渗透破坏及渗透稳定机理研究

阐述了水工结构渗透破坏的成因、规律,对堤坝渗透稳定性问题进行了分析研究,提出了堤防除险加固的措施.     

AMINO ACIDS' PROTECTIVEEFFECTSON EXPERIMENTAL ACUTE RENAL FAILURE

This study was carried out to elucidate the nephroprotective effects from a mixture of 8 L-amino acids and the possible mechanism of protection by this amino acid mixture. Acute renal failure model was induced by an intravenous administration of 10 mg/kg cisplatin to male Sprague-Dawley rats. A mixture of 8 L-amino acids or 0.9% saline was infused at a rate of 2 ml/h for 3 h, starting with a 2 ml bolus injection before cisplatin administration. Amino acids showed no acute effect on renal morphology. The infusion of a mixture of 8 L-amino acids increased GFR by 85% in control rats. The abnormalities of urine sodium and potassium excretion caused by cisplatin were markedly attenuated by the administration of the amino acid mixture. With the infusion of this amino acid mixture, cisplatin-induced abnormal state 4 respiration returned to control levels and the depressed state 3 respiration, respiratory control ratio and carbonyl cyanide p-trifluoromethoxyphenyl hydrazone-uncoupled respiration were ameliorated remarkably. A mixture of 8 L-amino acids showed marked nephroprotection against cisplatin-induced acute renal failure in rats and might function through augmentation of the cisplatin-injured renal mitochondrial electron transport-oxidative phosphorylation sequence, probably via stabilizing the membrane (including inner mitochondrial membrane) protein tertiary structure. In addition, this amino acid mixture remarkably increased GFR and decreased urine sodium excretion in rats.