21世纪高校学生工作发展趋势初探

２１世纪信息时代的到来和高等教育改革的不断深化，对我国高校学生工作提出了严峻的挑战。在这种新的形势下，高校学生工作将呈现五种发展趋势。     

关于《中国土壤系统分类》几个实际工作问题的探讨

《中国土壤系统分类》经过不断地发展和完善，日益受到重视．但仍有一些缺漏、不足和可改进之处．尤其是在实际的土壤调查工作中，发现的许多具体问题和实际情况，对于进一步地补充和完善系统分类体系提供了许多有价值的素材和启示。     

Basic fibroblast growth factor promoting the healing of palatal perforation in rats

AIM: To study the influence of basic fibroblast growth factor(bFGF) on treating ed palatal perforation in rats. METHODS: bFGF was given to the early palatal perforation in rat. The granulation tissues in perforations were grossly and pathologically obserVed. RESULTS: The the of wound healing was significantly in- crease in the bFGF group (P<0.01 ). bFGF could obviously promote the proliferation of the granulation tissues and fibroblasts. The number of AgNORs granules in fibrablasts were 3.73 ±0.52 in the buy group and 2.11 ±0.31 in control group (P < 0.05). CONCLUSION: bFGF could promote the growth of granulation tissues and had a strong promotion on the wound healing in palatal perforation. It was helpful in repairing palatal perforation.     

使用PMSG等激素提高四川黄牛繁殖效率研究再报

在初报基础上改进用药方法、扩大试验规模到２４头。发情率９５．８％，总受胎率７０．８％，得一胎孪生牛；校正后的产Ｄｕ间隔以对照组有显著缩短。该处理方法在缩短空怀期、治疗屡配不孕等方面表现了良好作用。重点讨论了该方法的适应范围、对动物选择的要求，以及处理后再发情时间与受孕效果的关系。     

一种改进的基因表达数据分类方法

从分类算法和特征基因选择两个方面研究基因表达数据的分类,将传统的Support Vector Machines(SVM)算法和K-nearest neighbor(KNN)算法两者结合成为一种应用于基因表达数据分类的算法,并针对基因表达数据分类数据集“样本少,维数高”的特点,提出了一种改进的基于相关性的递归特征消除算法(简称为C-RFE),消除了数据冗余．实验结果表明,新方法可有效提高分类准确率和特征选取的效率．     

Dynamic Development of Aphelenchoides besseyi on Rice Plant by Artificial Inoculation in the Greenhouse

A study was done on the relationship between Aphelenchoides besseyi and the symptoms of small grains and erect panicles. This is an important rice disease in Jiangsu Province, China. A. besseyi was extracted from small grains and erect panicles and cultured artificially, and then inoculated into bud and leaf sheaths of seedlings of two Oryza sativa cultivars, namely Zhendao 2 and Wuyunjing 7 in a greenhouse. The effect on rice growth, in particular the small grains and erect panicles, was revealed by the extent of the disease, seed expansion stages, nematode load, and nematode mortality. In contrast to healthy seedlings, the height, length, and the numbers of spikelets of unhealthy panicles of Zhendao 2 were decreased by 6.7, 16.4, and 13.5%, respectively. Before anthesis, nematodes were attracted to the leaf sheath and apical meristem, nematode load increased by 40%; after anthesis, nematodes occurred in spikelets principally and the number increased by 90.8%. The percentages of infected seeds and nematode load were highest in plump seeds and lowest in empty seeds. Nematode mortality on grain with normal endosperm was lower than seeds with abnormal endosperm. Results indicated that A. besseyi was the pathogen in rice with the symptoms of small grains and erect panicles. Wuyunjing 7 manifests only the small grains and erect panicles symptoms and not the symptoms of leaf white-tip. These symptoms of small grains and erect panicles are new symptom records for the disease caused by A. besseyi on rice.     

常用除草剂在幼林除草抚育中的效益试验研究

试验结果表明 :草甘膦配剂除莠效果达到 85 %以上 ,如果加配 0 0 3%的森草净 ,除莠效果达 89%以上 ,而且除莠时效长 ,利于维护林地环境。除莠成本只是人工除草的 6 8%～ 78%。林草净除莠效果可达 97 5 %以上 ,但目前成本过高 ,难为林农接受     

微型泵专用电动机的改进设计

针对微型水泵的工作要求，讨论了其配用电动机在冲片槽形、定转子槽数、绕组型式、温升、电容器端电压、起动力矩等方面的设计特点；在通用标准电机设计方法的基础上，提出了改进设计方法。经多规格电机的设计验证，方法实用，效果明显。     

Bio—G除臭剂对蛋鸡舍内氨气及产蛋性能的影响

在面积相等，饲养密度相近的2栋蛋鸡舍内连续15d喷洒Bio-G除臭剂，每天1次，每次5L，结果表明，喷洒Bio-G后，鸡舍氨气含量明显下降，但对蛋鸡产蛋性能无明显影响。     

现代设计院工程设计项目管理初探

在概述项目、项目管理、基建程序、设计程序的基础上，探讨了现代设计院的工程设计项目组织、项目管理的质量控制、造价控制、进度控制、条件管理，以及设计院提高项目管理水平的途径。