农村电网远程监测系统的设计

介绍了农村电网远程监测系统的设计方案,阐述了其系统结构及总体功能,重点介绍了用于该系统的嵌入式网络服务器的设计及通信软件的设计以及该系统所涉及的数据采集技术、实时网络通信技术等。     

复合式小梁切除术的临床观察

目的 :观察复合式小梁切除术的手术成功率及术后并发症。方法 :对23例(27眼)小梁切除术中应用0 4mg/ml的丝裂霉素C ,联合前房穿刺 ,外置巩膜瓣可拆除缝合的方法进行观察。结果 :23例中功能滤过泡达100%,术后6mo眼压稳定 ,术后仅1例发生Ⅱ级浅前房。结论 :复合式小梁切除术不仅提高了抗青光眼手术的效果 ,而且大大减少了并发症的发生     

电视胸腔镜下微创脊柱侧弯前路松解术的初期临床结果

探讨电视胸腔镜在严重脊柱侧弯前路松解中的应用价值,并对其初期临床结果进行分析.2001年11月-2002年8月,共11例严重脊柱侧弯患者接受电视胸腔镜下前路松解,均为女性,特发性胸椎脊柱侧弯,年龄14～17岁.冠状面Cobb角90°～100°,Risser征+++～++++,松解范围T5～T12,松解节段5～7.术后行牵引二周再行后路TSRH矫形内固定术.术中出血量为100～150mL,手术时间180～220min,术后引流量520～650mL,引流时间48～96h,二期后路手术矫正率平均为58%.电视胸腔镜下脊柱侧弯的前路松解在不影响矫形手术效果的同时,能减少组织损伤,降低感染可能,减轻术后疼痛,缩短病人的康复时间.     

前交叉韧带运动损伤临床治疗的进展

前交叉韧带是膝关节最重要的稳定因素,对膝关节起着导向和限制作用.前交叉韧带断裂可以导致严重的关节不稳,从而严重影响运动功能;如未得到及时治疗,还会继发半月板、关节软骨损害和骨性关节炎等.近年来临床研究中发现,前交叉韧带断裂导致膝关节功能丧失,常常在一段时间内呈进行性加重的态势.因此,在治疗上需要从韧带的解剖、组织学和生物力学等各方面进行研究,完善前交叉韧带运动损伤的临床治疗.     

基于SPCE061A单片机的USB通信应用

所设计的USB设备系统主要实现SPCE061A单片机与PC机之间的通信,应用于中低速外部设备,用以解决PC机外设端口的竞争和提高设备的传输速度.     

DanHong Injection inhibits the development of primary abdominal aortic aneurysms in apoE knockout mice

Clinical observations indicate that DanHong Injection （DHI） can increase blood flow and reduce various syndromes in patients with cardiovascular disease. How- ever, it still needs to define the function of DHI and the involved mechanisms in details, such as the protective effect on the development of primary abdominal aortic aneurysms （AAAs）. In this study, we determined whether DHI is able to inhibit AAA in apoE knockout （apoE-/-） mice. Thirty apoE-/- male mice on high-fat diet （0.5 % cholesterol, 21% fat） were randomly divided into two groups and received i.p. injection of saline （100 μL/day） and DHI （100 μL/day）, respectively, for 16 weeks. At the end of experiment, we determined the development of atherosclerosis in en face aorta and aneurysms,pathological morphology of arterial wall, and serum lipid levels. We also determined the expression of monocyte chemoattractant protein-1 （MCP-1）, MMP-2, and MMP-9 mRNA in aortic wall using real-time RT-PCR. Our results indicated that high-fat diet induced the development of AAAs in apoE-/- mice, but the induction was totally blocked by DHI （P 〈 0.01）. The result of staining of abdominal aortic cross sections showed that DHI main- tained the collagen content in arterial wall, thereby pre- venting the animals from the development of AAA. Although DHI had little effect on serum total- and LDL- cholesterol levels, it reduced the expression of MCP-1, MMP-2, and MMP-9 mRNA in aortic wall （P 〈 0.01）. Taken together, our study suggests that DHI can inhibit the high-fat diet-induced AAA formation. The inhibitory effects may be related to the maintenance of the collagen content and inhibition of expression of AAA-related genes. Our study may suggest a new application of DHI in clinics.     

基于通信顺序进程的并发DEDS的规范和证实

在实时通信顺序进程（TCSP）的基础上对离散事件动态系统（DEDS）进行建模、规范和证实。介绍了TCSP中与DEDS相关的一些研究成果，根据离散事件的特点作了符号语义上的改进，就两个具体的例子——自动导引小车（AGV）和火车道口系统道口系统建立了TCSP模型，给出了它们需要满足的特性，并据此确立了控制方法和综合后的系统模型。     

Regulation of BMP4 on the proliferation and differentiation in SVZa neural stem cells

The neural stem cells in the anterior subventricular zone (SVZa) mainly generate the progenitors that will differentiate into neurons, and along a highly circumscribed migratory access Rostral migratory stream (RMS), they migrate to the olfactory bulbs (OB). To understand the effects of BMPs on SVZa neural stem cells, in this study BMP4 at various concentrations was used to induce SVZa neural stem cells, and the living cell labeling using BMP4 promotor conjugated with red fluorescence protein showed the expression of BMP4 dynamically. The results demonstrated that low BMP4 doses (1-5 ng/mL) promoted while high doses (10-100 ng/mL) inhibited the proliferation of SVZa neural stem cells, and BMP4 promotedneuron differentiation in the early stage (1-3 d), howeverm, it inhibited the neuron commitment after 4 d. Noggin, the antagonist of BMP4, blocked the physiological effects of BMP4. In OB, BMP4 is mainly to accelerate the progenitors to withdraw from the cell cycle and trigger the differentiation, and in RMS, it promotes the proliferation of committed progenitors and not differentiation, further in SVZa, BMP4 enhances astrocyte commitment.     

电刺激腹中隔区对IL-1_β作用下兔POAH温敏神经元放电特性的影响

目的 :进一步探讨中枢解热机理。方法 :采用微电极细胞外记录 ,观察在致热原IL - 1β作用下电刺激兔腹中隔区 (VSA)对视前区 -下丘脑前部 (POAH)温度敏感神经元放电特性的影响。结果 :(1)IL - 1β 使热敏神经元放电频率减少时 ,电刺激腹中隔区可明显降低POAH热敏神经元的温度敏感系数。 (2 )IL - 1β 使冷敏神经元放电频率增加时 ,电刺激腹中隔区可增加POAH冷敏神经元的温度敏感系数。结论 :作为负调节中枢的VSA可通过影响致热原作用下POAH区温敏神经元放电特性而解热     

试论英语话剧与跨文化交际能力的培养

文章试论以英语话剧为载体,通过研读剧本、表演话剧、与观众的交流等一系列的实践环节,培养学生的跨文化交际能力。