3D虚拟解剖模型在解剖学教学中的应用探析

在康复治疗技术专业解剖学教学中应用3D虚拟解剖模型和学生手机APP进行学习,能很好地解决标本短缺的问题,取得较好的教学效果。文章介绍3D虚拟解剖模型概况,探讨3D虚拟解剖模型的应用优势,并指出3D虚拟解剖模型的不足和改进办法,以激发学生的学习兴趣,使教师的教与学生的学都变得更加轻松。     

虚拟仿真实验技术在物理实验教学中的应用探讨

在物理实验教学中,传统的教学模式是教师单纯进行口头讲解,然后完成一些基本的实验,导致学生不能彻底掌握实验的过程,无法有效提升学生的思维能力和动手能力。文章主要探讨虚拟仿真实验技术在物理实验教学中的应用,指出虚拟仿真实验技术不仅能够提高物理实验教学质量,而且能够提高学生的自主探究能力。     

胡杨对非确定性输水响应的生态表征

采用参照对比、实地调查、定点观测的方法,对新疆塔里木河下游长期干旱胁迫输水后不同地下水条件下胡杨生长量、生长势、开花结实以及更新响应的生态表征进行分析。结果表明：输水后一定时段内,胡杨一级枝年轮生长量随地下水埋深增加而降低,可以明确标定输水的响应时间、响应范围和响应程度;随着输水的进行,不同地下水条件胡杨年轮生长量逐步趋近;胡杨大树枯枝比与地下水埋深相关良好,是衡量胡杨生态恢复明确、易测的指标：输水后胡杨在一定范围发生更新,但更新范围、更新方式、更新苗长势及开花结实和保持种子活力所需的地下水条件仍爱输水方式、输水量和输水时间的限制。     

广东省顺德区幼儿园教师岗位培训实践探索

为贯彻落实国家有关幼儿园教师持证上岗的规定,广东省顺德区开展了为期两年的幼儿园教师岗位培训工程,对全区尚未领取教师资格的在职幼儿园园长和教师进行全员免费培训。培训着重提高教师考取教师资格的能力,把面授与跟岗见习相结合,在管理上实行项目主办制,按"分区域、分学历、分专业"的原则逐期推进。岗位培训是实现教师持证上岗的临时举措,现实中更需要突破现有体制障碍,为幼师考取教师资格提供便利。     

Adaptive finite-time control for stochastic nonlinear systems subject to unknown covariance noise

This paper is devoted to the adaptive finite-time control for a class of stochastic nonlinear systems driven by the noise of covariance. The traditional growth conditions assumed on the drift and diffusion terms are removed through a technical lemma, and the negative effect generated by unknown covariance noise is compensated by combining adaptive control technique with backstepping recursive design. Then, without imposing any growth assumptions, a smooth adaptive state-feedback controller is skillfully designed and analyzed with the help of the adding a power integrator method and stochastic backstepping technique. Distinctive from the global stability in probability or asymptotic stability in probability obtained in related work, the proposed design algorithm can guarantee the solution of the closed-loop system to be finite-time stable in probability. Finally, a stochastic simple pendulum system is skillfully constructed to demonstrate the effectiveness of the proposed control scheme.     

由二叉树遍历序列还原二叉树

遍历二叉树是"数据结构"课程中讨论的重要内容之一,通过对二叉树的四种不同遍历序列(即前序遍历序列、中序遍历序列、后序遍历序列、层次遍历序列)的具体分析,总结二叉树的四种遍历序列间的关系,解决怎样由二叉树的遍历序列还原二叉树的问题.     

Transgenic barley with overexpressed PTrx increases aluminum resistance in roots during germination

A transgenic barley line (LSY-11-1-1) with overexpressed Phalaris coerulescens thioredoxin gene (PTrx) was employed to measure the growth, protein oxidation, cell viability, and antioxidase activity in barley roots during germination on the presence of 2 mmol/L AlCl₃ on filter paper. The results show that (1) compared with the non-transgenic barley, LSY-11-1-1 had enhanced root growth, although both were seriously inhibited after AlCl₃ treatment; (2) the degree of protein oxidation and loss of cell viability in roots of LSY-11-1-1 were much less than those in roots of non-transgenic barley, as reflected by lower contents of protein carbonyl and Evans blue uptakes in LSY-11-1-1; (3) activities of catalase (CAT), glutathione peroxidase (GPX), ascorbate peroxidase (APX), and glutathione reductase (GR) in LSY-11-1-1 root tips were generally higher than those in non-transgenic barley root tips, although these antioxidase activities gave a rise to different degrees in both LSY-11-1-1 and non-transgenic barley under aluminum stress. These results indicate that overexpressing PTrx could efficiently protect barley roots from oxidative injury by increasing antioxidase activity, thereby quenching ROS caused by AlCl₃ during germination. These properties raise the possibility that transgenic barley with overexpressed PTrx may be used to reduce the aluminum toxicity in acid soils.     

远程开放教育英语学习者辍学研究

本研究针对广东地区远程开放教育英语本科辍学者,采用个体访谈形式调查、剖析辍学者辍学的心理动因,对辍学现象进行全方位的深描,试图通过辍学者的个人体验和意义阐释,探求远程英语学习者的辍学原因。对访谈内容采用内容分析方法进行分析。研究发现,影响远程开放教育英语本科学习者放弃学业的主要因素是:情感在场的影响、情感交互程度低、工学矛盾。本研究试图为远程教育实践机构有的放矢地制定相关措施,减少辍学人数提供有益参考。     

耐热木聚糖酶源细菌筛选、鉴定及酶学性质

利用木聚糖作为唯一碳源的基础盐培养,在50℃培养条件下,从新乡周围土样及腐殖质中筛选到1株产耐热β-木聚糖酶细菌,初步鉴定为巨大芽孢杆菌（Bacillus megaterium FLH-2）.该菌株在40~55℃生长良好,最适生长温度50℃.木聚糖酶粗酶性质研究表明：该酶最适pH和最适温度分别为6.0和65℃;在pH 5.0~9.0及温度30~75℃之间酶活相对稳定,分别处理30 min,相对酶活仍保持在80%以上.     

跨民族文化新闻传播理念的认知与构建

本文探讨了在多民族文化共存的情况下,如何切实有效地实施新闻传播的问题.