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51.
随着高速公路的发展,交通安全成为这个时代的主要话题,影响交通安全的因素很多,除了天气环境因素、驾驶因素、管理因素以外,道路设计施工中的安全因素也尤为重要。 相似文献
52.
通过采用粉喷桩、浆喷桩、真空联合堆载预压、塑料排水板超载预压、砂桩超载预压等方法处理高速铁路软土地基的现场试验,对土工格栅在不同处理方法中的作用进行了研究。得出各种地基土工格栅应变量和相应的应力试验数据,为不同的地基处理方法采用不同强度的土工格栅设计提供参考。 相似文献
53.
Tef is the most important crop in Ethiopia and is well-adapted to growing environments, but grain yields are low. The government is therefore promoting the adoption of improved varieties, inorganic fertilizers and new planting techniques. This study gathered information on the use of new agronomic practices and barriers to their adoption through a semi-structured questionnaire administered to 60 farmers or respondents from each of 4 districts of Tigray region in northern Ethiopia viz Laelay-Maichew, Medebay-Zana, Ahferom and Alamata. Data were coded and analysed using SPSS software. Except for animal feed and crop rotation, there were significant differences between districts in the relative importance of several criteria for different uses. Improved varieties were used by the majority of respondents in all districts and fertilizers in all except Alamata where severe moisture stress dictated the choice of variety and reduced fertilizer application. Weed control was mainly by hand except in Alamata where chemical control was common because of the predominance of broad-leaved weeds. Transplanting maximized the yield of tef, but a cost–benefit analysis showed that row sowing was more profitable. The study concluded that new varieties better adapted to the likelihood of reduced rainfall and that respond efficiently to fertilizer inputs need to be developed. Until suitable technologies are available, high labour costs would in part dictate some agronomic practices, even if this led to lower yields. 相似文献
54.
55.
为实现桥梁施工精度的准确控制,保证桥梁施工质量符合设计要求,对某多跨连续-刚构桥梁的施工控制进行了计算分析。首先,通过理论计算桥梁的预拱度,并在施工过程中采取相应的高程及应力控制措施;其次,通过现场实测,对施工过程中的高程及应力进行实时监测,将监测值与控制值进行比较,以评价控制效果。实例检验结果表明:在高程控制方面,最终合龙高程误差不超过8mm,满足了桥梁的线型要求;在应力控制方面,主梁和墩身应力均为压应力,且远小于规范限值,满足设计要求。因此,在桥梁施工过程中,通过理论计算与施工控制相结合的方法,能够实现桥梁高程及应力的有效控制,达到预期效果。桥梁施工控制措施的有效性在研究中得到了验证,可为类似桥梁施工提供参考。 相似文献
56.
The job stress and coping behavior of female employees has become a key issue in the hospitality industry. This study investigates the moderating role of regulatory leisure coping styles on the effect of job stress on female employees’ well-being. Specifically, this study extends Patry et al.’s (2007) findings to further confirm the direct and moderating role of regulatory leisure coping styles in the relationship between job stress and well-being. Data were collected from the female employees of 22 tourist hotels in Taiwan. The results showed that the Planned-Breather Leisure Coping Style (PBLCS) was positively and significantly associated with well-being, whereas the Avoidant Leisure Coping Style (ALCS) had a negative and significant effect on it. In addition, the results also revealed that the PBLCS plays a buffering role, but that the ALCS plays an amplifying role. Based on these findings, the implications and research suggestions are then discussed. 相似文献
57.
《Journal of medical economics》2013,16(6):828-834
AbstractObjective:The objective of this study was to compare clinician and patient measures of satisfaction with two pharmacological stress agents (PSA), regadenoson and dipyridamole, used in Single Photon Emission Computed Tomography (SPECT) Myocardial Perfusion Imaging (MPI).Methods:This observational study included patients who had undergone SPECT MPI with regadenoson or dipyridamole, as well as the clinician/clinical technologist who performed the test. Mean scores for individual item and domain scores of the main outcome measures were computed as well as the effect sizes (ES) of the mean difference in scores between treatment groups. Statistical significance of the mean item and domain score differences were assessed via Mann-Whitney tests.Main outcomes measures:Two self-report questionnaires which had beeb previously developed and validated: Patient Satisfaction/Preference Questionnaire (PSPQ) and Clinician Satisfaction/Preference Questionnaire (CSPQ).Results:A total of 87 patients (68 received regadenoson, 19 received dipyridamole) and nine clinicians/clinical technologists took part in the study. Patients had a mean age of 66.8?±?12.2 years, and 56.3% were male. Compared to dipyridamole, use of regadenoson was associated with greater clinician satisfaction on all items and domains of the CSPQ (p?<?0.001 for all comparisons). Among patients, regadenoson was associated with less bother and greater satisfaction than dipyridamole for all items on the PSPQ. These patients reported less stinging at the injection site (ES?=??0.66) and less nervousness during injection (ES?=??0.60). The PSPQ found that regadenoson patients were more satisfied with their PSA than dipyridamole patients in all areas.Limitations:This study utilized a relatively small sample size of dipyridamole patients and lacked an adenosine group. A broader sampling of professionals would also help demonstrate generalizability.Conclusion:Both patients and clinicians reported higher satisfaction with regadenoson compared to dipyridamole for SPECT-MPI. Clinicians were particularly satisfied with the preparation and administration aspects of the drug, while patients rated it highly on convenience and reduced incidence of side-effects. 相似文献
58.
江武贵 《福建金融管理干部学院学报》2011,(1):54-58
大学生初步担任足球裁判员,面临较大的心理压力,这种心理压力产生的外在因素有来自比赛球员、教练员、观众、天气状况、场地等因素的压力;内在因素有业务水平、体能、职业道德、思想动机气质与性格等因素的压力.过大的心理压力不得于大学生做好足球执法工作,就当通过提高理论水平、实践能力、心理素质和身体素质,以消除大学生足球裁判员的心... 相似文献
59.
公路工程软地基加固对工程质量有关键作用,分析了软地基处理施工的常见方法,并以实例探讨了软地基处理在公路工程中的应用。 相似文献
60.
Xinyi Lisa Qian Careen M. Yarnal David M. Almeida 《Leisure Sciences: An Interdisciplinary Journal》2013,35(1):35-51
The stress suppressing model proposes that sufficient resources reduce stress. The stress exposure model suggests that certain factors expose individuals to more stress. The current study tested these two models by assessing the within-person lagging effect of leisure time on perceived severity of daily stressors. Analyzing eight-day diary data (N=2,022), we found that having more leisure time than usual on a day reduced perceived severity of daily stressors the next day and that the decrease in severity became larger with further increase in leisure time. Additionally, the effect is much stronger among busy individuals who usually had little leisure time. The findings demonstrated an accelerated suppressing effect that differed between-person, and the lagging effect affords stronger implication for causality than correlational analysis. 相似文献