Discourses of antagonism and desire: marketing for international students in neighbourhood schools

This paper explores the consequences of these discourses for the ways that international students are identified and positioned within school communities. My argument is developed in four sections. The first describes my ongoing exploration into the impact of international student programmes in Australia. The second exemplifies my argument: exploring the day‐to‐day experiences of vice principals in two Victorian government state secondary schools as they market their schools, and examining the systemic and ontological discourses played out within those conversations. The third interrogates discourses of identity and difference, neo‐liberalism and naïve cosmopolitanism which I find shape teacher conversations about international student programmes. In the final section, I argue that the impact of the discourse formations implicit in teacher talk about international student programmes has been the objectification of international students and their ambivalent inclusion within the school community.     

一类n级嵌套的三角形电阻网络的研究

三角形电阻网络是电工技术常见的电路,可以通过△-Y电阻等效变换简化电路结构.由递推公式解出一类n级三角形嵌套电阻网络等效电阻的表示方法,可以方便地分析嵌套级数和相应电阻对等效电阻的影响.     

Detection of plasmid-mediated IMP-1 metallo-β-lactamase and quinolone resistance determinants in an ertapenem-resistant Enterobacter cloacae isolate

Objective  To investigate the mechanism of carbapenem resistance and the occurrence of plasmid-mediated quinolone resistance determinants qnr and aac(6′)-Ib-cr in a clinical isolate of Enterobacter cloacae. Methods  An ertapenem-resistant E. cloacae ZY106, which was isolated from liquor puris of a female gastric cancer patient in a Chinese hospital, was investigated. Antibiotic susceptibilities were determined by agar dilution method. Conjugation experiments, isoelectric focusing, polymerase chain reaction (PCR), and DNA sequence analyses of plasmid-mediated carbapenemases and quinolone resistance determinants were preformed to confirm the genotype. Outer membrane proteins (OMPs) were examined by urea-sodium dodecyl sulfatepolyacrylamide gel electrophoresis (Urea-SDS-PAGE). Results  Minimum inhibitory concentrations (MICs) of imipenem, meropenem, and ertapenem for ZY106 were 2, 4, and 16 μg/ml, respectively. Conjugation studies with Escherichia coli resulted in the transfer of significantly reduced carbapenem susceptibility. ZY106 produced IMP-1 metallo-β-lactamase and CTX-M-3 extended-spectrum β-lactamase, and E. coli transconjugant produced IMP-1. Plasmid-mediated quinolone resistance determinant qnrS1 was detected in ZY106. Transfer of the qnrS1-encoding-plasmid into E. coli by conjugation resulted in intermediate resistance to ciprofloxacin in E. coli transconjugant. Urea-SDS-PAGE analysis of OMPs showed that ZY106 lacked an OMP of approximately 38 kDa. Conclusion  It is the first IMP-1-producing Enterobacteriaceae in China and the first report of a clinical isolate that harbors both blaIMP and qnrS genes as well. The blaIMP-1, blaCTX-M-3, and qnrS1 are encoded at three different plasmids. IMP-1 combined with the loss of an OMP possibly resulted in ertapenem resistance and reduced imipenem and meropenem susceptibility in E. cloacae.      

高速公路沥青路面裂缝控制对策

结合高速公路施工实践,针对沥青路面的温缩和干缩特性及在收缩应力作用下易产生收缩裂缝的缺点,阐述了高速公路沥青路面裂缝产生机理、控制措施及施工工艺,为以后高速公路沥青路面防裂缝提供借鉴。     

从“临川四梦”看汤显祖生命理想的抗争与幻灭

汤氏剧作以“四梦”为最,后人除为其艺术成就称好之外,其所蕴含的至情主题及哲学内涵更为大家所吸引,这四梦中一以贯之的情生、情至、情灭主题也正是这位剧作大家坎坷一生、矛盾复杂思想的艺术体现。     

基于CFD的赛艇阻力板空气动力性能数值模拟

目的:讨论一种在赛艇训练中增加训练阻力同时又不影响运动员技术动作的设备,即赛艇阻力器,在不同攻角、不同速度状态下,阻力、压力的变化,阻力与速度之间的关系以及增阻效果分析。方法:运用CFD软件FLUENT 6.2版本进行数值模拟。结果:速度不同,攻角相同状态下的阻力系数是相等的,阻力随速度和攻角的增大而增大,速度变化对阻力板阻力及压力的影响要大于角度的变化所产生的影响,阻力大小与速度的平方成正比,而阻力系数是常数。以155kg和175kg赛艇,阻力板攻角90°,赛艇划行速度5m/s为例,当无风状态时,安装阻力板的155kg赛艇增加的阻力(20.58N)比增加20kg重量(175kg)的阻力值(7.25N)大13.33N,增加的阻力值接近2倍。当顺风风速为3m/s时,阻力板增加的阻力为3.26N,比增加20kg重量的阻力值小3.99N,当逆风风速为3m/s时,阻力板增加的阻力为51.94N,比增加20kg重量增加的阻力值大44.69N,增加的阻力值近6倍多。结论:FLUENT软件对赛艇阻力板阻力计算是准确的,模拟的结果可以应用于具体的实际问题中。90°攻角状态下使用阻力板增加的阻力要优于由于赛艇艇重增加所达到的增阻效果。当处于顺风训练时,风速使阻力板增加的阻力值减小,减弱增阻效果,而逆风训练时,风速使阻力板产生的阻力值增大,加大了增阻效果。因此,采用阻力板训练,可以不改变赛艇的吃水和重心,保证运动员技术的完整性和连贯性,并且增加训练的强度,提高了训练的科学化水平。     

几种植物在稀土尾砂基质上的抗旱力比较

以稀土尾砂为基质,在盆栽条件下对南方几种常用的复绿草种进行了干旱胁迫对植物生长影响的试验,试验时间135天。结果表明,干旱胁迫对不同草种生物量影响有一定差异,干旱胁迫3周处理与对照的生物量(干重)之比为:百喜草(0.92)>白三叶(0.83)>狼尾草(0.81)>弯叶画眉草(0.8)>狗牙根(0.72)>高羊茅(0.7),干旱对百喜草生物量的影响最小,其次是白三叶、狼尾草和弯叶画眉草,对高羊茅生物量的影响最大。干旱胁迫下叶片卷曲形态观测表明,百喜草受影响最小,其次是弯叶画眉草,狼尾草、高羊茅、狗牙根和白三叶受影响最大。综合比较,百喜草的抗旱力最强,其次为弯叶画眉草,可作为可能遭受较长时间伏旱影响的南方地区矿山废弃地植被恢复的理想种类。     

高峰公司主提升设备现状及未来规划

高峰公司主提升设备都是90年代初、中级产品,存在设备老化,能耗高的情况。为响应国家节能减排号召,降低企业能耗成本,采用新技术、高效、节能的新设备,并结合高峰公司实际情况,对老提升系统设备进行升级改造,是公司的当务之急。     

浅谈如何确保电梯接地电阻的检测质量

电梯接地保护措施是保障电梯电气安全的一项重要安全技术,接地系统的检测也是电梯安装工程竣工验收检验和定期检验的重要项目之一,如何确保电梯接地电阻的检测准确可靠,对于电梯使用、维护和检验人员的安全有着至关重要的意义。文章对如何确保电梯接地电阻的检测质量进行了分析探讨。     

某地铁隧道二衬结构裂缝原因分析

地铁隧道二衬结构裂缝对地铁隧道稳定性存在较大影响,针对某地铁隧道二衬结构开裂的情况进行研究分析,找出其开裂原因,表明:二衬结构裂缝宽度未进一步扩张,裂缝的最大宽度为1.22mm,且所有裂缝宽度基本呈现缩小趋势,其中最大缩小量为0.034mm,从而确保地铁隧道的结构安全,以及地铁的正常运营。