[[alternative]]Survey Study of Building Escape and Evacuation Load Factor in Leisure and Teaching Building (I)

計畫編號：NSC91-2211-E032-026研究期間：200208~200307研究經費：362,000[[sponsorship]]行政院國家科學委員

基于.NET的高校精品课程资源挖掘系统

为提高教学质量,建立规范性教学体系,依托省级以上精品课程优质资源,建立基于.NET的高校精品课程资源挖掘系统。对于组成本系统框架的三个重要模块分别作了原理性说明,同时说明了此系统的可行性并简单描述了系统的实现情况

Advances in Electrospinning Technology for Preparing Nanofibers

通过对近年来大量相关文献进行分析,在介绍最新静电纺丝技术的同时,归纳出静电纺丝技术制造纳米纤维发展的两个方向,即微观控制方向与宏观制造方向.指出微观方向发展主要集中在如何提高纳米线的定位精度与纤维均一性等微观指标的控制;宏观方向上将聚焦于如何提高纺丝效率以及丝线有序性收集等关键问题上,为静电纺丝技术进一步发展提供了新的思路.Based on the analysis of much related literature in recent years,it introduces some of the latest technologies.Meanwhile,it sums up the development of nano-fibers in the two directions,micro-direction and macro-direction.In the micro-direction,more studies will focus on improving positioning accuracy,micro-fiber uniformity and so on.In the maro-direction,spinning efficiency and orderly collection will be emphasized.This study provides a new way of thinking for further development of electrospinning technology.国家自然科学基金资助项目(E051005);广东省自然科学基金资助项目(S2011040004079);广东工业大学博士启动基金资助项目(113010);广东省引进创新科研团队资助;广东省微纳加工技术与装备重点实验室资

INFLUENCE OF SURFACE ROUGHNESS ORIENTATIONS ON FRICTION COEFFICIENT OF WHEEL/RAIL SPECIMEN IN OIL LUBRICATION

黏着力是列车安全与平稳运行的关键因素之一.最大黏着力与摩擦力有关,摩擦力的减小会导致黏着力的降低.表面粗糙度及其取向是影响摩擦系数的重要因素,然而,有关表面粗糙度取向对于混合润滑状态下摩擦系数的影响的研究结论似乎是矛盾的.用激光离散改性技术将车轮试样表面制备成具有菱形、纵纹、横纹3种典型的形貌,并且与不作激光离散改性处理的车轮试样作对比,用基于确定性模型的统一雷诺方程数值分析法和小比例尺度的轮轨试样摩擦学实验,得到的结论是:在油润滑状态下,激光表面形貌大幅提高摩擦系数,其中菱形对应的摩擦系数最大,纵纹与横纹的摩擦系数相差不大,摩擦系数的大小主要取决于由表面粗糙度取向决定的接触区内粗糙峰接触压力与总压力之比,侧流效应也是影响摩擦系数的重要因素,它主要取决于接触区内表面粗糙度的取向

Unsteady Aerodynamic Modeling Based on POD-ARX

The lack of stability is a problem encountered when applying the classical POD-Galerkin method to problems of unsteady compressible flows around a moving structure. To solve this problem, a hybrid reduced-order model named POD-ARX is constructed in this paper. The construction of this model involves two steps, including first extracting the fluid modes with the POD technique and then identifying the modal coefficients with the ARX model. The POD modes with the block of all modified primitive variables are extracted from the system response to the training signal. Once the POD modes are obtained, the snapshots are projected on these modes to determine the time history of modal coefficients and the resulting modal coefficients are used to identify the parameters of ARX model. Then, the ARX model is used to predict the modal coefficients of the system response to the validation signal. Sample two-dimensional aerodynamic force calculations are conducted to demonstrate this method. Results show that this method can produce a stable and accurate prediction to the aerodynamic response with significant improvement of computational efficiency for linear and even some nonlinear aerodynamic problems. In addition, this method also shows good wide-band characteristics by using the &quot;3211&quot; multistep signal as the training signal.</p

Effects of Moxibustion on Gastric Stress Ulcer Rats' Apoptosis Protein Phosphorylation

目的:研究艾灸对应激性胃溃疡大鼠胃黏膜细胞凋亡蛋白质磷酸化的影响,探讨艾灸促进胃黏膜损伤修复的信号转导机制。方法:将大鼠随机分为正常组、模型组、胃经穴组和对照点组,采用束缚冷应激法制作应激性胃溃疡大鼠模型,肉眼观察大鼠胃黏膜损伤程度,APOPTOSIS MICrOArrAy SlIdES芯片检测胃黏膜细胞凋亡蛋白质磷酸化水平。结果:与模型组比较,胃经穴组和对照点组大鼠胃黏膜损伤指数值均显著降低(P<0.05);与对照点组比较,胃经穴组大鼠胃黏膜损伤指数显著降低(P<0.05);APOPTOSIS MICrOArrAy SlIdES芯片检测结果显示:与模型组比较,胃经穴组大鼠胃黏膜细胞10种蛋白质磷酸化水平上调,其中bCl-Xl、MCl-1、bCl-2、IAPS 4种蛋白磷酸化水平差异有统计学意义(P<0.01,P<0.05);18种蛋白质磷酸化水平下调,其中Tnf、fAS、APAf-1、CASPASE-3、CASPASE-9、bAX 6种蛋白质磷酸化水平差异有统计学意义(P<0.01,P<0.05)。结论:艾灸可促进胃黏膜的损伤修复,调节多种凋亡相关信号蛋白质的磷酸化水平,并且存在一定的经脉脏腑相关性。Objective: To study the effects of moxibustion on apoptosis protein phosphorylation in rats with gastric stress ulcer and to explore the signal transduction mechanisms promoting gastric mucosal injury and repairing moxibustion.Methods: The rats were randomly divided into normal group,model group,stomach meridian group and the control point groups and each group had 10 rats.The stress ulcer rat model was established by using restraint cold stress method.We observed the rat gastric mucosa injury degree and Apoptosis Microarray Slides microarray was used to observe the gastric apoptosis protein phosphorylation levels.Results: Compared with the model group,the gastric mucosa injury index values of control point and meridian groups were significantly lower( P < 0.05).Compared with the control point group,a significant reduction in rat gastric mucosa injury index was in meridian group( P < 0.05).Apoptosis Microarray Slides microarray results showed that 10 kinds of protein phosphorylation levels increased,among which Bcl- XL,Mcl- 1,Bcl-2 and IAPs protein phosphorylation levels were statistically significant( P < 0.01,P < 0.05) and 18 kinds of protein phosphorylation levels decreased,among which TNF,Fas,Apaf- 1,Caspase- 3,Caspase- 9 and Bax protein phosphorylation levels were statistically significant( P < 0.01,P < 0.05).Conclusion: Moxibustion can promote gastric mucosal injury and repair and regulate phosphorylation of several proteins related to apoptotic signals and there is a certain correlation between the meridians organs.国家自然科学基金项目(30960484;81260556

Effects of mowing plus waterlogging on germination and seedling growth of Spartina alterniflora

互花米草(Spartina alterniflora)是我国危害最严重的外来入侵植物之一,探索环保、经济、有效地防治互花米草的技术对保护我国海滩生态环境具有重要意义。本研究通过人工气候室(20~25℃)的盆栽实验,研究刈割与淹水对互花米草萌发和幼苗生长的影响。实验持续4个月,对互花米草地上部分进行了2次刈割,首次刈割是在互花米草生长季结束时,3个月后进行第二次刈割。首次刈割后持续淹水至实验结束,淹水处理设计0、5、10、20 cm四个淹水深度。首次刈割后各淹水处理互花米草根茎上迅速萌发克隆苗,种子的萌发比克隆苗晚约3个月。不同淹水深度对克隆苗的萌发和生长均有抑制作用,克隆苗株数、株高和地上生物量均随淹水深度增加而减少。第二次刈割后各淹水处理均没有再萌发克隆苗,但有少量种子实生苗,其中20 cm水深处理的实生苗数量最少。刈割加淹水可以很好地抑制互花米草的萌发和幼苗生长,据此建议互花米草防治方案为:在春季萌芽前,修筑堤坝,保持淹水20 cm,在营养生长期后期贴地刈割互花米草,继续淹水,第二年重复同样的刈割和淹水。为防止二次入侵,需要在邻近的互花米草分布区同时进行治理。&nbsp;</p