摘要：针对现代高性能计算机架构开展非结构CFD节点内共享内存并行,是提升浮点计算效率、实现更大规模流体仿真应用能力的关键。然而由于非结构网格CFD计算存在拓扑关系复杂、数据局部性差、数据写冲突等问题,传统算法如何共享内存并行化以高效发挥多核CPU/众核GPU的硬件能力,成为一个重大的挑战。从一个工业级非结构CFD软件出发,通过深入分析其计算行为和访存模式,设计实现了多种共享内存并行算法,采用了网格重排序、循环融合、多级访存等数据局部性优化技术进一步提升性能。面向多核CPU架构,系统开展了循环级与任务级两种并行模式的对比研究;面向众核GPU架构,创新地提出了一种基于多级访存优化方法的规约并行策略。利用M6机翼和CHN-T1飞机算例对所有并行算法及优化技术进行了全面验证与评估。结果表明:在多核CPU平台上,基于剖分复制的任务级并行策略性能最好,采用Cuthill-McKee重排序以及循环融合分别使整体性能提升10%。在众核GPU平台上,基于多级访存的规约策略具有显著的加速效果,优化后热点函数的性能相比优化前提升了3倍,相比CPU串行性能整体加速比可达127。

摘要：目的了解皮肤疾病患者心理健康状况,为心理护理提供依据。方法采用状态-特质量表（STAI-FormY）及自行设计表格对2008年10月13日至12月26日在我院皮肤科住院的159例皮肤病患者进行评估。结果159例患者状态焦虑阳性率13.8%（22/159）;按文化程度分类比较：小学以下阳性率24%（6/25）,初中阳性率15.6%（7/45）,高中（中专）阳性率15%（6/40）,大专阳性率10%（2/20）,本科以上阳性率3.4%（1/29）,差异有显著性意义（P〈0.05）;按年龄分类比较：19-39岁阳性率5%（4/74）,50-69岁阳性率25%（15/60）,差异有显著性意义（P〈0.05）。结论皮肤疾病患者存在一定的焦虑问题,应用STAI-Form Y能较准确的判断焦虑患者,为心理护理提供依据。

摘要：Objective: To assess effects of multifactorial lifestyle modifi-cation on antihypertensive drug needs in treated hypertensive individuals. Design: Randomized controlled trial. Setting:Research studies unit. Participants: Overweight hypertensive patients, receiving one or two antihypertensive drugs, were recruited by advertising, and allocated randomly to a usual care group(controls; n=118) or a lifestyle modification group(programme group; n=123). Intervention: A 4-month programme of weight loss, a low-sodium ‘Dietary Approaches to Stop Hypertension’-type diet with added fish, physical activity and moderation of alcohol intake. After 4 months, if mean 24-h ambulatory blood pressure(ABP) was less than 135/85 mmHg, antihypertensive drugs were withdrawn over 4 weeks and long-term home blood pressure monitoring was begun. Main outcome measures: Antihypertensive drug requirements, ABP, weight, waist girth at 4 months and 1-year follow-up. Results: Ninety control group and 102 programme group participants completed the study. Mean 24-h ABP changed after 4 months by-1.0/-0.3±0.5/0.4 mmHg in controls and-4.1/-2.1±0.7/0.5 mmHg with the lifestyle programme(P< 0.01). At follow-up, changes in the two groups were not significantly different(4.1/1.3±1.1/1.0 mmHg in controls; 2.5/-0.1±1.1/0.8 mmHg in the programme group; P=0.73). At 4 months, drug withdrawal differed significantly between the groups(P=0.038) in men(control 44%; programme 66%) but not in women(65 and 64%, respectively; P=0.964). At follow-up, sex-related differences were not significant, and 41%in the control group and 43%in the programme group maintained drug-withdrawal status. With the programme, net weight loss was 3.3 kg(P< 0.001) at 4 months and 3.0 kg(P< 0.001) at follow-up; respective net decreases in waist girth were 3.3 cm(P< 0.001) and 3.5 cm(P< 0.001). Conclusions: A 4-month multifactorial lifestyle modification in patients with treated hypertension reduced blood pressure in the short-term. Decreased cen