摘要：为提高磁流变制动器制动能效,提出一种多盘连续可变磁流变液工作间隙结构的磁流变制动器。在ANSYS workbench环境下完成不同电流、间隙状态下的三维静态磁场仿真,对磁场沿工作间隙分布状况进行分析,通过试验台架对制动器性能进行测试。结果表明,磁流变液工作区域磁矢量分布相对均匀,无明显积聚现象,磁路设计合理。理论与实验结果变化趋势基本吻合,但在电流较大时,两者之间误差呈逐渐增大趋势。制动力矩在0~2.5 A电流变化区间增速较快,而在2.5~4.0 A区间明显放缓,最大力矩达到146.4 N·m,较间隙未改变状态增加25.80%。设计的制动器TVR值达到48.81 kN·m/m^(3),较传统磁流变制动器结构更紧凑,力矩调节范围更广,设计思路及实验结论对磁流变制动器结构的进一步研究具有借鉴意义。

摘要：为了解决地面喷射引流器的结构参数及工作参数对其工作性能影响规律性认识的问题,以及地面喷射引流工艺效果不显著的问题,以四川某井组为例,利用气动力函数法初步设计了喷射器的结构参数;采用数值模拟方法,以引射系数为性能指标参数,分析了气相喷射器的内部流场;同时对气相喷射器的结构进行了优化,得到了结构尺寸参数和运行工况参数对引射系数的影响规律及喷射器最佳结构尺寸。研究结果表明,在设计工况下喷嘴出口倒角对引射性能的影响较小,角度在3.5°~5.0°均能较好工作,喷嘴距的长度与喷嘴喉部直径比为1.5,混合管截面段与喷嘴喉部最佳直径比为1.64。壅塞状态(临界流)下,增大引射压力能够提升引射系数,降低出口压力并不能提高引射系数;非壅塞状态下,增大工作压力、引射压力和减小出口压力均能提升引射系数。研究结果可为地面喷射引流效果的因素及规律提供新的认识,并为喷射器结构参数优化设计提供重要理论依据。

摘要：美国电影《变形金刚》真人版已经成为很多动漫迷与军事迷心中的经典三部曲，2014年，第四部《变形金刚》真人电影也即将上映。在此，让我们按照在电影中的出场顺序，盘点一下前三部中，以军队装备为原型的六大变形悍将!

摘要：采用三因子二次回归旋转组合设计研究水稻旱种施肥量、基肥施氮比例、播种密度对抽穗前群体干物质积累与分配的影响。结果表明,施氮量、基肥施氮比例及点播密度极显著影响抽穗前群体合成的光合物质量及其在茎、叶之间的分配。因此,适宜的施氮量、合理的肥料运筹及点播密度必将促进抽穗前群体合成适量的干物质,进而促进其由叶流向茎形成壮蘖、大穗并调控叶的生长,形成灌浆期高产群体结构以实现高产。最高产量为10.13kg/9.6m2(10.55 t/hm2)的各因子组合是:施氮量为1.6818(175.23kg/hm2)、基肥施氮比例为1.0000(80.00%)、点播密度为0.0000(25.50万窝.hm-2)。

摘要：Objectives: This study was conducted to evaluate oncology nurses' knowledge and compliance with oral mucositis (OM) management ***: A cross-sectional design with a nonparticipant observation approach was *** phase Ⅰ,a cross-sectional convenience sample (n =140) of oncology nurses completed the knowledge *** phase Ⅱ,a random sample (n =20) of oncology nurses from participants in phase I was observed during their ***: Fifty-seven (40.7%) of the participants had an unsatisfactory level of *** of them had knowledge deficits regarding pathology,OM definition,assessment,scoring,treatment,and patient education and advice.A significant difference existed among nurses with diploma,bachelor,and postgraduate degrees as determined by one-way ANOVA (P =0.001).There were no significant difference between average scores of male and female nurses were higher than those of nurses (P=0.45).No significant difference was observed among knowledge scores of nurses with different job titles (P =0.51).The average score of male nurses in terms of skill performance was higher than that of female nurses (29.20 ± 2.10 vs 27.10 ± 1.80) without statistical ***: The knowledge and compliance with OM management guidelines among Jordanian oncology nurses need to be *** OM prevention and management guidelines are adopted in *** education and training are also recommended.

摘要：Objective To understand the perceptions of pregnant Jordanian women who received antenatal care via mobile clinic,and to contribute new insights into the experiences of these mothers and how they evaluated the services that were *** Ten Jordanian mothers who had received antenatal care at a mobile clinic discussed their experiences in semi-structured,audiotaped interviews in a study that adopted a qualitative research *** analysis was done using interpretative phenomenological *** Three main themes were identified:Being informed about the medical campaign or missing the opportunity of being informed;The experience of receiving antenatal care was wonderful,although there was only one thing lacking;and they safeguard our life and take any opportunity to educate *** Data indicate that the mothers were largely satisfied with most facets of the antenatal care services they had received at the mobile ***,while services are generally well received,there are clear opportunities for ameliorating the quality of services *** mothers living in remote,deprived areas,outreach is not just an‘optional extra’but rather an essential service.

摘要：在设计之初，卡拉什尼科夫将AK-47在风沙泥水等恶劣环境中进行了严格测试，造就了AK-47的一副“钢筋铁骨”。实战中，AK-47十分可靠。即使它在连续射击或有灰尘等异物进入枪内的情况下，也能够保证正常运作。此外，它在沙漠、雨林、严寒、酷暑等极端恶劣环境下，也很少出现问题。

摘要：[目的]研究旱种技术对水稻粒重的影响。[方法]采用三因素二次回归旋转组合设计,研究旱种时施氮量、基肥施氮比例、点播密度及其互作对水稻华优3号粒重的影响。[结果]提高基肥施氮比例、基肥施氮比例与施氮量的互作可以显著提高水稻粒重;提高施氮量、点播密度,基肥施氮比例、施氮量与点播密度的互作将显著降低水稻粒重。施氮量、基肥施氮比例极显著影响水稻粒重。点播密度对水稻粒重没有直接影响,但其与基肥施氮比例、施氮量的互作对降低水稻粒重的影响最大。[结论]对于不同的水稻品种,合理施用肥料,控制点播密度可以提高水稻的粒重,进而提高产量。

摘要：用三因素二次回归旋转组合设计探索旱种技术对中国杂交水稻库源关系的影响。结果表明:水稻旱种的施氮量及氮肥运筹和点播密度极显著影响灌浆期群体叶面积、群体颖花量、总实粒数及产量和粒叶比。因此适宜的施氮量、合理的氮肥运筹及点播密度必将调控抽穗期群体LAI在适宜范围内并延缓灌浆群体叶面积的衰减而保证有较大的光合叶面积、显著提高颖花量而形成较高的粒/叶比,进而增加库对光合物质需求,促进同化物质从源到库转动速率的提高,而形成"库大"、"源足"、"流畅"的高产群体而实现高产。

摘要：在所有的视觉艺术中,建筑不仅生动地反映出社会的审美和愿望,还体现了它们所处时代的精神。现存的一栋栋建筑或那些建筑史料,从中都可具体体现建筑创作的动机与目的。18世纪末之前,英国人已经成为孟加拉的主要殖民力量并且统治政权根深蒂固,社会、文化、城镇体系被彻底整理。孟加拉的殖民主义纠葛成为无法改变的历史事实,而那些有关建筑艺术的启示和范本都来源于英国和欧洲。欧洲殖民统治时期,孟加拉三角洲地区暴雨连绵洪水泛滥,在欧洲建筑理念影响下,孟加拉的建筑形式特征产生了变化。这种东西方融合的建筑风格,是英国殖民建筑为适应孟加拉本土气候与文化背景而不断变化的出色代表。本文以孟加拉殖民时期的建筑为研究对象,论述了其建筑语汇从欧洲到本土建筑的逐渐转变。最后一段讨论的是孟加拉湾殖民者将本土建筑朝全球化的居住模式转变的过程。所以可以说,建筑艺术的影响是双向的,一个方向是从欧洲到孟加拉,另一个方向是从孟加拉到欧洲和西方世界。