火电厂的水平衡测试与设备安全运行

分析水平衡测试的原理和特点,讨论利用水平衡测试的数据诊断设备的运行安全状况的方法.     

电站仿真机报警系统设计及应用

将仿真机中报警处理作为独立子系统进行设计,通过判定树搜索、多线程分支检测、动态预读取等技术,实现报警信号的快速获取、存储和浏览;将报警逻辑独立存储,实现报警逻辑的在线调整;应用多媒体技术,集成了语音、警铃以及6000V设备启停等音效,进一步提高了仿真培训效果.该系统已在某厂300MW仿真机中得到成功应用.     

生命科学及其相关学科的研究动态

论述了我国杂交水稻培育技术,用马铃薯生产塑料、人造人体器官、用遗传工程培育具有新结构新性状作物、植物工厂的研究以及胰岛素开发的动态和产生的效益.     

“相思湖作家群现象”的文化反思

“相思湖作家群现象”无疑是多种不同的因素处于某种特定关系中的结果 ,无疑是自身文化特性的自然“天成”而又灵气飞扬 ,无比聪慧的精神突围。进入 2 0世纪 90年代 ,“相思湖作家”队伍出现了断层。从表面上看 ,这是市场经济带来的价值体系的重构所造成的 ,但根本上说 ,这是自身的深厚历史文化传统的缺失、并且尚未确立属己的精神风范的某种必然。所幸 ,“大写作”品牌的提出 ,既是对一种急功近利的否定 ,更是对一种精神风范的追求     

Climatic variations recorded by the sediments from Erhai Lake, Yunnan Province, southwest China during the past 8000 a

Erhai Lake is a large lake with important climatic significance in Yunnan Province, southwest China. The multi-proxy sedimentary records from Erhai Lake indicate the 9 stages of climatic changes with the alternation of warm-dry and cool-wet during the past 8000 a. The variations of Asian monsoon systems were the main cause for the climatic changes in southwest China. The warm-dry period was coincident with the intensification of India monsoon and Northwest Pacific Sub-tropical High Pressure, and the cool-wet corresponding to weak of India monsoon and its main rain belt moving back to southwest China.     

50 ku keratin-like protein and -microtublin coexist in higher plant cells

IF-like proteins have been obtained from suspension cells of Nicotiana tabacum by selective extraction. Western blot analysis shows that the major components of IF-like proteins are 6 keratin-like proteins of 64, 58, 55, 54, 50 and 45 ku. Specially the 50 ku protein also reacts with polyantibody against microtublin. Two-dimensional gel electrophoresis shows that the 50 ku protein is composed of two different proteins and their amino acid sequences have been determined. Part of the sequence of one protein is identical to that of -microtublin and the other protein's sequence has no significant homologue, which should be a new sequence-unknown protein. These results suggest that 50 ku keratin-like protein and -microtublin coexist in higher plant cells, and that may lead to the phenomenon of co-distribution of IF and microtuble in plant cells.     

Ethanol metabolism in calluses of several selected plant species on two typical plant-growth-regulator balanced media

For investigation on the characteristics of ethanol metabolism in tissues of different plant species, calluses from eight selected plant species were cultured on medium supplemented with ethanol in tightly sealed culture flasks. Changes of the ethanol level were detected by gas chromatography. During the culture period, the calluses of tobacco, potato and petunia were, able to catabolize exogenous ethanol, resulting in the prominent decline of the ethanol level in the medium. The calluses of melon and peanut were also able to catabolize thanol but with lower efficiency. The other three calluses of carrot, soybean and rice did not catabolize ethanol but instead produced small to large amount of ethanol, resulting in the increase of the ethanol level in the media. It was also found that changing the balance between auxin and cytokinin could influence only the ethanol metabolism efficiency but could not change the metabolism patterns on ethanol of the cultured calluses. It can be concluded that, ethanol metabolism pattern of calluses in cultures is an innate physiological characteristic of the respective plant species. Foundation item: Supported by the Natural Science Foundation of Guangdong Province (No. 950406) Biography: Yang Yue-sheng (1957-), male, Professor, research direction: plant physiology and plant cell engineering.     

珊溪库区农药植物资源的初步研究

本文对珊溪库区农药植物资源作了初步分类，并对资源进行了评价。     

大容量高参数单元机组热工自动控制

讨论了大型火电单元机组对控制系统的要求，分析了大型火电机组自动控制系统的主要组成部分及其发展概貌，综述了集散控制系统在火电厂的应用及发展。     

煤炭坝矿区硫的赋存特点与成因分析

对煤炭坝矿区硫的成因、硫在煤中的赋存状态及赋存规律进行了研究.结果表明煤炭坝2煤中的硫以有机硫占绝对优势，次为硫化铁硫；有机硫主要以硫醇、硫化物与二硫化物、噻吩及其衍生物等形式存在；有机硫的成因与成煤植物中菌藻类的参与、海水中硫酸盐的不断供给、介质具弱碱性、还原性和微生物活动及活性铁离子受限有关.在此基础上，对2煤中硫的可选性作出了评价.表2，参6.