切片胡萝卜热风干燥过程中传热模拟分析与试验研究

物料内部湿热扩散过程是干燥设备和干燥技术研究的基础。干燥过程中,物料内部的湿、热扩散是同时发生的,本文综合湿热扩散过程,提出了切片胡萝卜内部传热模型和内部传质模型,运用第三边界条件进行了传热过程的模拟,并作了实验验证。结果表明:模拟值和实测值十分接近,最大相对偏差小于1.8%;因此用该模型模拟胡萝卜片干燥中传热过程是可行的。模拟结果还显示:物料内各处温度变化不同;在整个干燥过程中,各层的温度梯度随干燥时间先变大,随后逐渐变小,到干燥后期,各层温度趋于一致。     

马克思主义哲学课教学改革刍议

马克思主义哲学教学改革的重点是教学内容的改革;现行的哲学教科书在内容上存在诸多问题;在明确学习哲学的意义及马克思主义哲学的理想的前提下,对马克思主义哲学教学内容进行改革;提出了改革的大体思路和初步设想.     

培养基含水量对平菇抗杂菌能力胞外PH值及生物转化率的影响

本实验证明，培养基含水量70％有利于提高菌丝的抗杂能力，有利于提高生物转化率，且胞外PH值下降最迅速。培养基含水量在75％以下时，含水量越高出菇潮次越多。培养基含水量过高过低是影响杂菌污染率的最主要因素之一。建议实际生产中培养基含水量在65％－75％之间较为适宜。     

论教科书空无内容的内涵与类型

教科书的空无内容是教科书中应该呈现却没有呈现的内容。根据判断主体的不同,教科书的空无内容可分为官意类空无内容、民意类空无内容、专家类空无内容、教师类空无内容和学生类空无内容等五类。探讨教科书的空无内容,对于教科书的编审和使用具有十分重要的意义。     

南唐诗研究述评

南唐诗在五代十国诗坛上有着非常重要的地位,但至今却没有引起应有的重视.对南唐诗的研究可分为两个阶段:20世纪以前的研究较为肤浅,主要是点评、感悟式的评价;20世纪以来,对其研究才陆续展开.南唐诗有着丰富的内容,可采取不同的方法进行研究.     

Reflective pedagogy: the integration of methodology and subject-matter content in a graduate-level course

This article presents a critical reflection on how we, instructors of a graduate-level course in higher education administration, sought to integrate theoretical and subject-matter content and research methodology. Our reflection, guided by autoethnography and teacher reflection, challenged both our assumptions about curriculum design and our process of designing and teaching the redesigned course. We found that our efforts to integrate course content and methodology differed from students’ prior experiences and resulted in a disconnection between their experience and the intended course learning objectives. Recommendations include understanding the degree program culture and students’ course expectations, using assignments that facilitate learning of both theory and methods, and balancing classroom discussion among theory, methodology, and the integration of the two.     

Distributing and Showing Farmer Learning Videos in Bangladesh

Purpose: To describe the results of showing farmer learning videos through different types of volunteers.

Design/Methodology/Approach: Semi-structured interviews with volunteers from different occupational groups in Bangladesh, and a phone survey with 227 respondents.

Findings: Each occupational group acted differently. Shop keepers, tillage service providers, agricultural input and machine dealers reached fairly small audiences. Tea stall owners had large, male audiences. Non-governmental organisations and community-based organisations, reached more women. The cable TV (dish-line) operators showed the videos on local TV, but some were reluctant to do so again. The Union Information Service Centres showed the videos and reached women viewers. Half of the official government extension agents surveyed also showed the videos publically.

Practical Implication: This video featured maize, wheat and rice seeding machinery. Because the machinery is complex and requires hands-on training, this first video aimed to expose tillage and sowing service providers and farmers to the machinery, without trying to teach them how to use it. But some farmers were so interested that they watched the video many times to learn more about the equipment. Before farmers and service providers decide to buy machinery for direct seeding, they still want to see and learn from demonstration plantings, to examine first-hand how the crop behaves when planted with the new equipment.

Originality/Value: Video can be an effective way of sharing high-quality information with a large audience, if properly distributed.     

论共产党员标准的时代内涵与保持党的先进性

党员标准是一个政党的重要体现。革命战争时期，要求必须为党所提出的主张而坚决奋斗。社会主义建设时期，提出要为更高的党员条件而奋斗。改革开放和现代化建设新时期，要求党员必须成为人民群众的先锋模范。全面建设小康社会的新时期，必须放在实践“三个代表”重要思想中去考察。党员标准的这种时代内涵，体现了不同时代对党员先进性的不同要求。     

《匆匆》教学设计

本文主要从教材分析、设计思想、媒体设计思路等方面叙述了笔者教学的思想和过程，以供同仁高榷。     

红壤中针铁矿的铝替代及其与土壤发育的关系

在研究的红壤类土壤样品中普遍存在着针铁矿的铝同晶替代作用,供试样品中针铁矿铝替代量为0.14％～27.21％(摩尔百分数),平均为8.77％。红壤亚类、黄红壤亚类和黄壤亚类平均依次为10.32％、9.79％、1.30％,其中红壤、黄红壤亚类与黄壤亚类之间差异明显,这反映了成土条件的差异。土壤中针铁矿的铝替代量与粘粒中铁的游离度正相关,与土壤粉砂粘粒比负相关,说明针铁矿中铝替代量随土壤发育的增加而增加。