特殊教育教师的职业压力、应对方式及职业倦怠

采用自编的特殊教育教师职业压力、应对方式测查问卷和Maslach编制的教师职业倦怠问卷对284名特殊教育教师进行测查.结果表明,特殊教育教师的职业压力总均分女教师(2.78±0.44)显著大于男教师(2.52±0.62).特殊教育教师职业压力年龄差异显著,30-39岁年龄组职业压力(2.83±0.60)最为严重,29岁或以下年龄组(2.70土0.45)其次,40岁或以上年龄组(2.34±0.39)最小.特殊教育教师在遇到压力和困扰时采用最多的应对方式是解决问题(0.79±0.20),其次是转移注意(0.61±0.24)和求助(0.62±0.20).特殊教育教师的职业倦怠较为严重,重度以上低成就感、情绪衰竭、去个性化的特殊教育教师比例分别为12.8%、17.6%和9.9%.职业压力因子对特殊教育教师的职业倦怠均有显著的正向预测作用.解决问题、转移注意、合理化等应对方式对特殊教育教师的职业倦怠有负向预测作用.     

采血应激对蛋鸭产蛋性能的影响

在生产实践中,常常需要对种群基因进行测定,以鉴定品种的纯度,采血是必须的手段.采血对蛋鸭是一种应激.为了研究采血应激对蛋鸭产蛋性能的影响程度,石狮水禽保种中心设计了该实验.实验测定了金定鸭和莆田黑鸭采血前后各10d的产蛋量、蛋重和产蛋率,并用t-检验进行了差异性分析,发现采血应激对金定鸭和蒲田黑鸭的产蛋量和产蛋率影响差异显著,采血后产蛋量和产蛋率均下降（P〈0.05）;采血应激对莆田黑鸭的蛋重影响差异不显著,采血后蛋重减轻不明显（P〉0.05）,而对金定鸭的蛋重影响差异显著,采血后蛋重减轻（P〈0.05）.说明采血应激对蛋鸭产蛋性能存在明显的影响.     

On composite foundation with different vertical reinforcing elements under vertical loading: a physical model testing study

Aphysical model facility was designed, built, and setup for conducting model tests on a composite foundation in a soil ground. The model tests were carried out on a composite foundation with different combinations of vertical reinforcement elements in the same soil ground. Via the analysis of the collected data the characteristics of the composite foundation with different reinforcing elements were obtained, including the characteristics of load-settlement curves, column stresses, stresses of the intercolumn soil, pile-soil stress ratio, and load-sharing ratios of columns and soil. Results from the model tests reveal the mechanism of a composite foundation with different reinforcing elements quantitatively. It is concluded that both a composite foundation with a combination of steel pipe pile and sand column and that with a combination of concrete pile and lime column have a higher bearing capacity than the composite foundation with only sand columns with the same conditions of soil ground and loading. A composite foundation with lime column and sand column embodies no much better performance than that with sand colunms only.     

大型薄板件的铣削加工

大型薄板件最大的质量障碍是加工后的变形问题,采用试切法消除共振以及合理降温和多次时效的方法,可以有效地防止大型薄板件加工后的变形且产品质量稳定。     

岩体弹性模量沿地层埋深变化规律研究

利用国内外关于地应力的实测资料,通过数值方法探讨我国岩体的重要力学参数——弹性模量沿地层埋深的变化规律：10km埋深以上基本是线性增加的,在10km埋深附近会急剧减小.以丹江口地区为例,依据其表层地应力和岩体弹性模量的试验数据,利用我国岩体弹性模量沿地层埋深的变化规律,反演该区几种主要岩石在不同埋深处的弹性模量.     

A kinetic approach to evaluate salinity effects on carbon mineralization in a plant residue-amended soil

The interaction of salinity stress and plant residue quality on C mineralization kinetics in soil is not well understood. A laboratory experiment was conducted to study the effects of salinity stress on C mineralization kinetics in a soil amended with alfalfa, wheat and corn residues. A factorial combination of two salinity levels （0.97 and 18.2 dS/m） and four levels of plant residues （control, alfalfa, wheat and corn） with three replications was performed. A first order kinetic model was used to describe the C mineralization and to calculate the potentially mineralizable C. The CO2-C evolved under non-saline condition, ranged from 814.6 to 4842.4 mg CO2-C/kg in control and alfalfa residue-amended soils, respectively. Salinization reduced the rates of CO2 evolution by 18.7%, 6.2% and 5.2% in alfalfa, wheat and corn residue-amended soils, respectively. Potentially mineralizable C （Co） was reduced significantly in salinized alfalfa residue-treated soils whereas, no significant difference was observed for control treatments as well as wheat and corn residue-treated soils. We concluded that the response pattern of C mineralization to salinity stress depended on the plant residue quality and duration of incubation.     

Carvedilol protected diabetic rat hearts via reducing oxidative stress

INTRODUCTION Diabetes is the largest morbidity of patients with heart failure and adversely affects outcomes of car- diovascular diseases (Beller, 2001). Oxidative stress has been associated with the pathogenesis of chronic diabetic complications including cardiomyopathy (Cai and Kang, 2003). The ability of antioxidants to inhibit these injuries has raised the possibility of newer therapeutic treatment for diabetic heart dis- eases. Recently, Bcl-2 gene has been focused because it was in…     

网络采编环境中编作主体应激反应分析

网络采编平台的应用和推广对编作主体的心理和行为都会产生不同程度的影响。该文基于网络采编和传统采编技术的差异性,采用心理学应激理论,对编作主体在使用新采编技术过程中出现的心理和行为变化进行探讨,分析其产生的原因,探索编作主体应激反应对新时期编作关系及采编技术发展带来的冲击作用,并提出相应的应对措施,为推广网络采编技术提供借鉴。     

农村中小学教师职业压力与解决策略

多年来农村中小学教师承受着升学、工作、经济生活、社会角色等方面压力,随着新课程改革后,他们面临着诸多方面的挑战,在职业压力方面尤为突出,聚焦农村中小学教师这一特殊群体,探讨其职业压力形成的原因,提出解决策略来缓解农村中小学教师的心理压力,促进农村教师专业化,农村基础教育的健康发展。     

自由支撑银薄膜的形貌演化规律及机理研究

采用直流磁控溅射方法在硅油基底上沉积出具有自由支撑边界条件的金属银薄膜系统,研究了银薄膜在大气环境中的表面形貌演化规律及其物理机理。实验发现银薄膜在真空状态下基本稳定,但在大气环境中发生强烈的收缩效应,使得薄膜开裂,其表面覆盖率不断降低。分析表明这一动态演化过程基本满足指数衰减规律,并可用薄膜内应力的不断释放加以解释。随着银薄膜的不断收缩,薄膜表面可呈现出异常丰富的褶皱形貌:在薄膜边界附近呈现基本垂直于边界的直线状条纹结构;而在薄膜中间区域,将形成二次起皱的扭曲状花样和无序网格状褶皱形貌。从单轴应力和双轴应力理论的角度出发,对各类奇特的褶皱形貌进行了细致的分析和讨论。