细小病毒MPV—Q株理化特性及其致病性的研究

细小病毒ＭＰＶ—Ｑ株是从患病雏番鸭体内分离的一种致病性病毒。电镜及理化特性检查表明该株病毒属细小病毒，圆形无囊膜，直径在２２—２４ｕｍ、对乙醚、胰蛋白酶、酸不敏感，对红细胞无凝集现象，对鸡、丽佳鸡、北京鸭、鹅无致病性。该病毒可引起雏番鸭发生以出血性肠炎为特征的急性败血性传染病。     

Value transfer in concurrent-schedule discriminations by pigeons

When pigeons are trained on a discrete-trial simultaneous discrimination, some of the value associated with the positive stimulus appears to transfer to the negative stimulus (Zentall & Sherburne, 1994). Pigeons preferred a negative stimulus that had been discriminated from an always-positive stimulus (S+) over a negative stimulus that had been discriminated from a sometimes-positive stimulus (S±). A very different finding (suggestive of transitivity of preference or contrast) was reported by Belke (1992). On concurrent probe tests of stimuli associated with equal variable interval (VI) schedules but originally trained in alternative concurrent pairs (one with a richer schedule, the other with a poorer schedule—VI 20 sec vs. VI 40 sec and VI 40 sec vs. VI 80 sec), the stimulus originally paired with the poorer schedule was preferred. But Belke’s results may have been obtained because the pigeons had been trained to peck the VI 40 sec paired with the poorer schedule and they had been trained not to peck the VI 40 sec paired with the richer schedule. In the present experiment, we avoided this bias by training pigeons on two concurrent schedules in which the tested stimuli both had been associated with the poorer schedule of the pair [A(VI 20 sec) vs. B(VI 80 sec) and C(VI 40 sec) vs. D(VI 80 sec)]. Evidence for value transfer was demonstrated when on probe trials pigeons preferred B over D.     

隋末骁果兵浅探

骁果兵是由隋炀帝在全国范围内招募的勇武豪侠之士组成的一支精锐部队.其最初的目的是为了征辽战争的需要,"雁门之围"之后发展成为一支完全由隋炀帝控制的亲军部队.从骁果兵的待遇、管理及使用等方面来看,它是与原有府兵完全不同的募兵."江都之变"之时,江都的主要军事力量是骁果兵.骁果的发展是隋炀帝加强中央集权的重要措施之一.     

分组教学在警察职业压力调适能力训练中的运用浅析

在压力调适能力训练课的分组教学过程中,作为指导者的教师可以采取以下三个方面的指导策略:一是选择分组方法时,应有利于促进每个学生的体验交流;二是为了更好地打造团队合作精神,可适时开展团队建设活动;三是在教学环节设计中,应根据教学目标采用适当的小组活动。     

酒店管理专业体验式教学模式初探——以中国劳动关系学院为例

酒店管理专业通过体验式教学,可以激发学生的学习兴趣,提高学生分析和解决问题的能力,实现应用型本科人才培养的目标。在酒店管理专业中推行体验式教学,可以认知体验、模拟仿真体验、真实环境体验的过程逐步展开,在此过程中,需要注意营造良好的体验环境,确保优秀的师资,做好过程监控及后勤保障工作。     

关注高职教师心理健康

社会对高级应用型技术人才需求的增加使高职教育迅速发展,这既为高职教师带来了发展的良好机遇,也为他们带来了前所未有的压力和挑战,在教学、科研、招生等压力下,高职教师出现了种种心理不适,这些不适影响了教师的心理健康,因此必须采取各种措施减轻教师的心理压力,教师自身也要增强保健意识,维护心理健康。     

Attention and curiosity in museums

Two hundred and thirty-four museum visitors of all ages were observed as they entered the Object Gallery area of the Florida State Museum. Visitors were observed under conditions where objects were available for close inspection but could not be manipulated (baseline data) and later when the same objects were placed on tables and were available for visitors to touch, move, and use a variety of senses to inspect them (intervention data). Data were recorded on the sex, age, and number of subjects in these areas under each of the above conditions. The results obtained show a significant increase in the number of visitors entering this section of the museum when manipulatable objects were available. Baseline data showed that 58.5% of the people who entered the Object Gallery went into the drawer section. However, when manipulatable objects were made available this increased to 82.3%. Chi-square analysis was used to determine whether the presence of manipulatable objects in the area increased the number of people who entered the area. It did (p < 0.05). Chi-square analysis was also used to determine whether entering the drawer section depended on age or sex. It was found that more children entered the drawer section than adults (p < 0.05) and significantly more female children and female adults entered as a result of intervention (p < 0.05). At the same time, more male children than adults entered after intervention (p < 0.05) than before. These data are supported by considerable curiosity research indicating that both children and adults are attracted to novel as well as complex stimuli which can be manipulated in both formal and free-choice environments. The data also support the growing movement to hands-on exhibits in natural history museums and science centers around the country, as well as hands-on classroom activities from the perspective of their attention attracting and holding power and their curiosity evoking characteristics. Whether these positive factors also lead to increased knowledge or skill development is a question yet to be explored.     

发达国家职业技术教育教学改革的特点和趋势

本归纳了发达国家职业技术教育课程设置的基础性、教学计划的弹性化、教学要求的实用性以及教学方式的灵活性等特征，并试评了发达国家职业技术教育教学发展的新动向。     

网络语音实验室条件下的教与学

从教学环境、学生和教师的角度,分析网络语音实验室条件下高校英语教学的优势与问题,并提出有必要对师生进行课程前期实验室使用和维护的培训;学生需要建立科学的网络学习观,培养个性学习策略和方法;教师应强化网络教学的教学形式、评价体系并适应角色转换。     

平远县东石镇铁矿矿区环境综合治理与尾矿利用

根据平远县东石镇公路沿线铁矿矿区的环境问题,针对性地提出了铁矿矿区环境综合治理和尾矿利用建议,为生态恢复和资源利用提供参考.