一种高效三唑除草剂的合成及应用

合成了一种高效除草剂[1] ,化学名称 :1,2 ,4—三唑— 3—磺酸—二乙基甲酰胺— 2 ,4,6—三甲基酚酯 ,采用熔点测定、元素分析、红外和核磁分析等手段鉴定了它的结构 ,并对其进行详细的生物活性测定 ,显示出良好的除草活性及较高的选择性     

随机性死机故障分析与排除

死机故障是电脑使用过程中一种常见故障 ,而随机性死机由于出现死机的故障不确定 ,所做操作性质不固定 ,而且死机发生时 ,显示的现象也不统一 ,所以随机性死机产生的原因相当复杂。本文通过对大量的维修实例的分析 ,总结出随机性死机故障产生的主要原因 ,提出了随机性死机故障的分析与维修方法。     

盲人高等音乐教育研究

通过特殊教育十向年的经验总结，明确了盲人高等音乐教学的培养目标与方向。根据盲人学生听觉，触觉、记忆超常的特点，采取扬长避短，口传心授的教学方法，取得了良好的教学效果。     

非线性三带模拟移动床色谱的半解析优化计算

针对三带模拟移动床色谱的实际模型，用一种融合了前馈与反馈的半解析优化计算方法对三带模拟移动床色谱过程进行了模拟．首先，由非线性单柱色谱理论解析地给出一个三带模拟移动床色谱的主要操作参数即切换时间值，然后利用所得结果与目标量之间的偏差来校正切换时间，在理论指导下进行优化搜索，切换时间能很快达到最佳值．将测得的系统参数引入计算，并将计算结果用于实际操作，得到了很好的分离效果．     

Effective networks for real-time distributed processing

This paper applies the concepts and methods of complex networks to the development of models and simulations of master-slave distributed real-time systems by introducing an upper bound in the allowable delivery time of the packets with computation results. Two representative interconnection models are taken into account: Uniformly random and scale free (Barabási-Albert), including the presence of background traffic of packets. The obtained results include the identification of the uniformly random interconnectivity scheme as being largely more efficient than the scale-free counterpart. Also, increased latency tolerance of the application provides no help under congestion.     

An Approach to the Notion of Reflective Teacher and Its Exemplification on Mathematics Education

Within research into the teaching profession, there are two main areas of interest, which have been thoroughly defined and consolidated: teacher’s knowledge and teacher’s professional development. This paper considers the latter area, and specifically sets out to define the concept of the reflective teacher and to show how we have applied this concept in our research. It aims at defining a more precise notion of teachers’ professional development linked to the concept of a reflective teacher, drawing on information from different interdisciplinary sources so as to frame the concept clearly. We discuss the conditions which determine the reflective teacher, and report on how these were put to use in a training course for practising teachers in which participants reflected on challenging episodes from their professional experience. We hope that clarifying this term will enable different educational agents (school teachers, teacher trainers or researchers) to have an informed view that can be interpreted and critiqued, and that it will also be of value to initial teacher training and to in-service courses.     

市场经济与企业经营管理

通过对市场经济优劣势的分析，明确企业必须学会生产，学会经营以及学会生产和经营内涵，使企业在市场经济竞争的环境中处于有利地位．     

高压平板电容器的数学模型

通过对建立平板电容器的电场模型，论证了高压平板电容器的极板加工不仅仅是一个简单的工艺问题，更是一个严肃的理论问题^[6]。刨光不严的高压电容器极板极易导致高压平板电容器的击穿^[7]。     

Adrenergic activation of triiodothyronine production in brown adipose tissue

There are several mechanisms by which homeothermic animals increase heat production, including shivering, sympathetic nervous system activation and stimulation of thyroid hormone secretion. Studies in rats have shown that increased sympathetic activity causes increased heat production in brown adipose tissue (BAT) after cold exposure or food ingestion. Acute cold exposure also increases circulating thyroid hormones which in turn stimulate cellular metabolism through induction of various enzymes. Most metabolic effects of thyroxine (T4) are thought to be due to the triiodothyronine (T3) which is produced from T4 by a process of 5' monodeiodination. There are two enzymes responsible for this reaction: type I, or propylthiouracil (PTU)-sensitive iodothyronine deiodinase (5'D-I), which is reduced in hypothyroidism, stimulated in hyperthyroidism and probably provides most of the circulating T3 in the adult rat. Type II 5'-deiodinase (5'D-II) is characteristic of brain and pituitary, is increased by thyroidectomy, is not inhibited by PTU and provides 50-80% of the intracellular T3 in these two tissues. Recently, 5'D-II activity was identified in interscapular BAT. As the sympathetic nervous system influences the metabolic activation of BAT, we have studied the effects of noradrenaline and acute cold exposure on BAT 5'D-II. We report here that both noradrenaline and cold exposure increase BAT 5'D-II through alpha 1-adrenergic receptors, whereas depletion of catecholamines with alpha-methyl-p-tyrosine (MPT) prevents the effect of cold but not that of noradrenaline. These results suggest that the sympathetic nervous system may increase T3 production in rats by stimulating BAT 5'D-II. By increasing metabolic rate, this rise in T3 would enhance the thermogenic response to sympathetic stimulation.