电信人员工作特征与工作倦怠的关系

为探讨电信人员工作特征和工作倦怠的关系,采用工作要求-决策自主问卷和工作倦怠问卷调查了526名某大型通信公司职工。分层回归分析的结果显示,在控制了人口统计学变量之后,工作特征所解释的方差变异量,在情绪衰竭、玩世不恭和职业效能三个维度分别增加了20.7%、20.1%和7.2%。该结果表明,适当降低员工的工作要求,增强技能多样性,扩大决策自主性,可望有效地预防电信人员的工作倦怠

Relationship Between Job-character and Job Burnout of Telecom Staff

为探讨电信人员工作特征和工作倦怠的关系,采用工作要求-决策自主问卷和工作倦怠问卷调查了526名某大型通信公司职工。分层回归分析的结果显示,在控制了人口统计学变量之后,工作特征所解释的方差变异量,在情绪衰竭、玩世不恭和职业效能三个维度分别增加了20.7%、20.1%和7.2%。该结果表明,适当降低员工的工作要求,增强技能多样性,扩大决策自主性,可望有效地预防电信人员的工作倦怠

The Effects of Work- Family Conflict on Telecom Employees＇ Job Burnout and General Health

采用工作家庭冲突问卷、工作倦怠问卷（MBI-Gs）和一般健康状况问卷（GHQ-12）调查了某国营电讯公司526名员工。中介回归分析（Mediating Regressin Analysis）的结果显示，工作家庭冲突及其两个子成分（工作浸扰家庭和家庭浸扰工作）都对心理健康具有显著的负向影响；工作倦怠对工作家庭冲突影响心理健康具有完全中介作用；具体而言，工作浸扰家庭对心理健康的影响受情绪衰竭和玩世不恭的完全中介；家庭浸扰工作对心理健康的影响受工作倦怠所有三个子成分的完全中介

The Effects of Acute Changes in Salinity on Respiration and Ammonia Excretion During Litopenaeus vannamei Postlarvae Development

凡纳滨对虾是我国沿海虾塘的主养品种,其对低盐和低溶解氧环境具有较强的适应性.本文研究急性盐度变化对凡纳滨对虾仔虾:(a)耐盐力;(b)呼吸和氨氮排泄代谢的影响;(c)涉及代谢底物的呼吸排泄氧氮原子比O/N;(d)培养于各驯化盐度梯度下仔虾的含水量和特定生长率(SGR).实验结果表明:凡纳滨对虾仔虾耐盐力随仔虾生长发育而增强,仔虾的耐盐力可作为虾苗质量或抗逆能力的指标;急性盐度驯化对早期仔虾耗氧率的影响尤为显著,急性驯化盐度梯度下仔虾耗氧率都高于原生存盐度下的,这是仔虾应急的能量消耗;急性盐度驯化对不同日龄与不同盐度梯度下的仔虾氨氮排泄率影响不大;无论是升高的或是降低的急性盐度驯化,仔虾的呼吸与氨氮排泄氧氮原子比(O/N)都高于仔虾原生存盐度下的.凡纳滨对虾仔虾渗透调节的可能机制是:属细胞外渗透调节,首先消耗能量丰富的脂储用于活跃的离子转运.凡纳滨对虾仔虾的含水量随盐度升高而降低;测定的特定生长率表明凡纳滨对虾最适的生长盐度为11～20.The white shrimp Litopenaeus vannamei is a dominating aquaculture species in China.This species is well adapted to environments of low salinity and can tolerate low levels of dissolved oxygen.This study was designed to know the effects of acute changes in salinity on:(a)the resistant ability to salinity changes,(b)the oxygen consumption and ammonia excretion,(c)the metabolic substrate(ON) on the different age of postlarvae,(d) the body water content and specific growth rate(SGR)of postlarvae by culturing in different salinity.The resistance to acute changes in salinity stress is increased with postlarvae developing.And the salinity tolerance of postlarvae can be used by shrimp hatcheries as a quality control procedure and a character of the resistance to abiotic stresses.The effect of acute changes in salinity on oxygen consumption is especially pronounced for the early instar postlarvae.The oxygen consumption under acute changes in salinity is larger than that of postlarvae lived seawater salinity,it is energy expenditure for salinity stress.There was not a significant effect of acute changes in salinity on the ammonia excretion in either postlarvl stages or salinity grads.ON for neither increased salinity acute changes nor reduced salinity acute changes are all higher than that of postlarvae lived seawater salinity.The possible osmoregulation mechanisms of Litopenaeus vannamei postlarvae is an extracellular osmoregulator,which is associated with energy expenditure for active ion transport,involving the degradation of energy-rich compounds such as lipids.The body water content of white shrimp postlarvae is decreased with increased salinity.Specific growth rate of white shrimp postlarvae by culturing in different salinity indicate that the optimal salinity for Litopenaeus vannamei growth is 11~20.海洋系学生科技创新项目(2003-2005)资

黄土丘陵区天然和人工植被类型对土壤理化性质的影响

不同植被类型对黄土高原土壤质量的改善作用存在较大差异。研究天然和人工植被类型对土壤性状的影响差异对于深入认识黄土高原植被恢复与土壤环境演化的关系,准确评价不同植被恢复模式生态环境效益具有重要意义。该研究以黄土丘陵区燕沟流域为例,选择研究区广泛分布的11种天然和人工植被类型为研究对象,系统分析了该区天然和人工植被类型对土壤性状的影响。结果表明:天然和人工植被类型对土壤性状的影响差异明显。200cm土层土壤含水率大小为农田&gt;天然草地&gt;人工乔木林地&gt;果园&gt;人工灌木林地&gt;天然灌木林地。与农田相比,天然灌木林地和天然草地土壤体积质量降低最为明显,人工乔木林地、人工灌木林地和果园土壤体积质量下降差别不明显。天然灌木林地、天然草地和人工灌木林地土壤有机质、全氮都有明显提高,人工乔木林地和果园土壤有机质和全氮提高不明显。不同植被类型土壤有机质、全氮总体随土层加深呈下降趋势,农田、果园和人工乔木林地土壤有机质和全氮垂直变化较小,而天然灌木林地、天然草地和人工灌木林地变化较大。不同植被类型土壤全磷含量差异较小,且垂直变化不明显。总体看来,天然植被类型对该区土壤性状改善作用优于人工植被类型,而人工灌木林的改善作用优于人工乔木林。</p

磁悬液自动搅拌输送机

本实用新型属于机械自动化工程领域，具体地说是一种磁悬液自动搅拌输送机，包括超声波液位传感器、输送水泵、搅拌桶、搅拌机构及防水电机，防水电机安装于搅拌桶的底面，防水电机的输出端与搅拌机构相连，搅拌桶内盛装有磁悬液溶液，搅拌机构及防水电机均浸没在磁悬液溶液液面以下，防水电机驱动搅拌机构旋转，通过搅拌机构对磁悬液溶液进行搅拌；搅拌桶的侧壁顶部安装有用于监控磁悬液溶液液面高低的超声波液位传感器，输送水泵可拆卸地安装在搅拌桶的侧壁上，输送水泵的底部浸没在磁悬液溶液液面以下。本实用新型具有结构简单，功率高效，转速连续可调，可实现自主输送及自主预警等特点

Interface Si donor control to improve dynamic performance of AlGaN/GaN MIS-HEMTs

In this letter, we have studied the performance of AlGaN/GaN metal-insulator-semiconductor high electron mobility transistors (MIS-HEMTs) with different interface Si donor incorporation which is tuned during the deposition process of LPCVD-SiNx which is adopted as gate dielectric and passivation layer. Current collapse of the MIS-HEMTs without field plate is suppressed more effectively by increasing the SiH2Cl2/NH3 flow ratio and the normalized dynamic on-resistance (RON) is reduced two orders magnitude after off-state VDS stress of 600 V for 10 ms. Through interface characterization, we have found that the interface deep-level traps distribution with high Si donor incorporation by increasing the SiH2Cl2/NH3 flow ratio is lowered. It’s indicated that the Si donors are most likely to fill and screen the deep-level traps at the interface resulting in the suppression of slow trapping process and the virtual gate effect. Although the Si donor incorporation brings about the increase of gate leakage current (IGS), no clear degradation of breakdown voltage can be seen by choosing appropriate SiH2Cl2/NH3 flow ratio

Public Emergency and Social Psychological Service System Construction ( Forum)

十九大报告中提出要&quot;加强社会心理服务体系建设&quot;。社会心理服务体系不仅是心理健康服务体系,更是一种社会治理体系。心理学研究成果既可以直接为民众提供心理服务,提高民众幸福感和积极心态,也可以为风险应对、公共突发事件防控提供有力的支持,辅助民众和政府部门做出更为理性的决策。新冠肺炎疫情给社会治理带来了新的挑战,也凸显了民众对心理学知识的需求与认同。随着社会心理服务体系的全面建设、新格局的显现,心理学各种功能将会充分展现于社会发展进程中。社会心理服务体系在后疫情时代将会整合资源发挥其完整功效,深度服务于国家治理体系和国家治理能力的现代化进程,为中国社会的进一步发展贡献更多的专业智慧。</p