冲裁模具降低成本和提高寿命的几条途径     

覃日强 《柳州职业技术学院学报》2006,6(2):69-72

从模具的设计制造、安装使用以及压力机的精度等三方面对模具的制造、维修成本和使用寿命的影响进行比较详细的分析,提出了从冷冲模具的设计制造、安装使用和提高压力机精度等方面入手,降低模具制造维修费用、提高工艺性能和延长模具使用寿命的方法作了比较全面的阐述,对降低冲压产品的生产成本具有很好的指导作用。  相似文献   

石涛画论浅议     

Liu Bo 《大连大学学报》1994,(2)

明朝大画家石涛的画论,极大地影响着当时的画坛和他以后各代画坛。本文论述了石涛关于“一画”、“皴法”、“似与不似”等理论。  相似文献   

基于深度学习网络的乳腺癌图片分类研究     

程年  俞晨  宁静艳 《教育技术导刊》2019,18(8):26-28

利用深度学习网络对组织病理图片进行分类,以减少病理学家工作量,达到利用计算机辅助治疗的效果。提出利用在两种预训练好的框架下提取的特征进行训练,并研究了多级分类,该成果有利于癌症后期治疗,更加方便临床医学应用;利用迁移学习能够减少训练时间,并解决数据集不足的问题;通过数据增强的方法,可有效提高分类准确度。  相似文献   

注射用丹参多酚酸对缺血性脑卒中患者的安全性评价     

孙莉  雷德宝 《襄樊职业技术学院学报》2013,(6):18-20,51

目的 观察注射用丹参多酚酸对缺血性脑卒中患者的生命体征和肝、肾功能变化状况,评价该药物在临床应用中的安全性.方法 将40例缺血性脑卒中患者根据其合并用药情况分为无合并用药组（A组,8例）、合并使用降压药组（B组,12例）和合并使用治疗脑梗死口服药物（C组,20例）3个组,对所有患者连续静脉滴注丹参多酚酸14天,在患者用药前和用药结束后3天内分别进行常规体格检查和肝、肾功能检测,并对结果进行分析.结果 40例患者3个组别,组内比较时,患者生命体征和肝肾功能指标用药前后的差异均无统计学意义（P＞0.05）.组间两两比较时,除了B组与C组患者用药后的舒张压、A组与B组患者用药后的肝功能ALT,差异具有统计学意义;其余组间比较,患者生命体征和肝肾功能指标用药前后,差异均无统计学意义（P＞0.05）.结论 注射用丹参多酚酸对缺血性脑卒中患者的生命体征和肝、肾功能影响甚小,该药物在临床应用中比较安全.  相似文献   

多媒体教学融入乳腺外科诊治教学中适用探究     

任光辉  郝晓妍  马斌林 《南昌教育学院学报》2013,(10):53-54

乳腺外科是一门专业性和社会实践性很强的学科,并且对学生医学知识有很高要求。以往学生在传统乳腺外科学习中因为学科枯燥无味而提不起兴趣,而在乳腺外科诊治教学中融入多媒体可将枯燥的医学知识转化为形象生动的动画和音乐,从而提高学生的学习兴趣。本文主要对多媒体在乳腺外科诊治教学中进行探究。  相似文献   

Uncertainty and previvors’ cancer risk management: understanding the decision-making process     

Marleah Dean  Carla L. Fisher 《Journal of Applied Communication Research》2013,41(4):460-483

Women who test positive for a BRCA genetic mutation, but who have not been diagnosed, or 'previvors,' experience intense, chronological risk-related uncertainty. Women’s risk management medical decisions can be a way to manage their uncertainty, but little is known about how uncertainty informs their decision or how uncertainty is impacted by these medical decisions. Using an uncertainty management theoretical lens, we interviewed 46 previvors about their decision-making process. A thematic analysis revealed two uncertainty management (i.e., risk-reducing) decision-making pathways (preventive surgery and increased surveillance) with each pathway encompassing a three-part process of 1) uncertainty appraisal, 2) medical decision (i.e., uncertainty management strategy), and 3) outcomes. The findings advance theoretical thinking about uncertainty and risk management as an ongoing, distressful chronic experience, and highlight the importance of life-span phenomena in women’s decision-making process. Based on the findings, we constructed a translational tool to aid genetic counselors and previvors facing these medical decisions.  相似文献   

Intensity of lifetime physical activity and breast cancer risk among Polish women     

Joanna Kruk 《Journal of sports sciences》2013,31(5):437-445

Abstract

Physical activity is associated with a lower risk of breast cancer, although research findings are inconsistent regarding the type, duration, intensity, and frequency of activities that are necessary to reduce the risk, as well as dependence on menopausal status. To address these issues, I examined the effect of physical activity on breast cancer risk among 858 Polish invasive breast cancer cases and 1085 controls. Data on components of lifetime household, occupational, and recreational activities were collected in 2003–2007, using a self-administered questionnaire. Odds ratios with 95% confidence intervals were estimated using unconditional logistic regression analyses and a full assessment of confounding variables. For all types of physical activity, odds ratios were calculated for self-reported and compendium-based assigned levels of activity. Moderate- and vigorous-intensity total and recreational activities, as well as moderate- and long-lasting low-intensity household activities, lowered the risk by at least 44% for the highest versus lowest quartiles of activity in both menopausal groups. The associations were linear (P_trend≤ 0.009). There was a suggestion of a risk reduction for occupational activity among post-menopausal women. These findings show that a risk reduction can be achieved by vigorous-intensity activities or by longer-lasting activities of moderate-intensity.  相似文献   

Quantifying stroke coordination during the breathing action in front-crawl swimming using an instantaneous net drag force profile     

Danielle P. Formosa  Mark G.L. Sayers  Brendan Burkett 《Journal of sports sciences》2013,31(18):1729-1737

Abstract

This study used both an instantaneous net drag force profile and a symmetry timing to evaluate the effect of the breathing action on stroke coordination. Twenty elite swimmers completed a total of six randomised front-crawl towing trials: (i) three breathing trials and (ii) three non-breathing trials. The net drag force was measured using an assisted towing device mounted upon a Kistler force platform, and this equipment towed the swimmer at a constant speed. The net drag force profile was used to create a stroke symmetry index for each swimming trial. Analysis using the symmetry indices identified that the majority of participants demonstrated an asymmetrical instantaneous net drag force stroke profile in both the breathing and non-breathing conditions, despite no significant differences in the time from finger-tip entry to finger-tip exit. Within the breathing condition, the faster swimmers compared to the slower swimmers demonstrated a lesser percentage of overlap between stroke phases on their breathing stroke side. During the non-breathing condition, the faster participants compared to the slower swimmers recorded a reduction in the percentage of overlap between stroke phases and less duration in the underwater stroke on their breathing stroke side. This study identified that the majority of participants demonstrated an asymmetrical net drag force profile within both conditions; however, asymmetry was less prevalent when examining with only the timing symmetry index.  相似文献   

脑卒中发病环境因素分析及干预     

国忠金  蔚言双  陈晓东  刘童 《泰安师专学报》2013,(3):62-70

本文以发病时间为统计指标,以诊断时间为辅助．首先运用Excel、SPSS软件以直方图的形式从横向和纵向两个层面对脑卒中发病人群进行了统计描述．其次,利用MatLab程序构建了多元回归模型,并以立体切片图形式直观展现了脑卒中发病率与气温、气压、相对湿度间的关系．最后,阐述了脑卒中发病的危险因素、发病前的预警信号与预防措施以及对高危人群提出了预警和干预的建议方案．  相似文献   

糖尿病性脑卒中患者早期按摩配合运动疗法疗效分析   总被引：2，自引：0，他引：2  

李荣源  王安利 《北京体育大学学报》2009,32(1)

目的:研究糖尿病性脑血管病患者的康复问题,探讨采用以神经发育疗法和运动再学习技术为主的运动疗法,同时结合早期手法按摩在不同类型糖尿病性脑血管病患者康复治疗中的作用,为糖尿病性脑血管病患者的康复提供临床依据.方法:将80例38～73岁确诊为糖尿病性脑血管病的患者随机分为三组进行研究.结果:一个月的观察期后,各组患者的运动功能、日常生活活动能力均有改善,但综合康复组患者的疗效优于按摩组和对照组(P<0.05).接受相同方法治疗(综合康复或按摩)后的不同类型(缺血性或失血性)脑卒中相互比较,MBI与FMA评分增加幅度虽有不同,但差异不显著(P>0.05).结论:早期手法按摩治疗可以显著改善不同类型糖尿病性脑卒中患者的运动功能和日常生活活动能力,但手法按摩配合运动疗法的综合康复效果要明显好于单纯的手法按摩,相同治疗对不同类型糖尿病性脑卒中疗效是一致的.  相似文献