我国南方部分地区实蝇记述及2种中国新记录

1980～1988年,曾用地中海实蝇、瓜实蝇和桔小实蝇(Trimedlure,Cuelure 和 Methy eugonol)性引诱剂,和野外采果相结合的办法,进行了实蝇的调查,所采集的标本,已鉴定出16种,其名称是;桔小实蝇、芒果实蝇、番石榴实蝇、辣椒实蝇、颜带实蝇、鳄梨实蝇、瓜实蝇、南瓜实蝇、颜黑纹实蝇、具条实蝇、拟具条实蝇、腹眼实蝇、二态实蝇、蜜柑大实蝇、桔大实蝇和黑肩光顶实蝇.内鳄梨实蝇和腹眼实蝇2种为中国新记录.在这次调查中,未发现地中海实蝇(Ceratitiscapitata Wied.)。     

Serum 5'nucleotidase activity in rats: a method for automated analysis and criteria for interpretation

A manual kit for determining serum 5'nucleotidase (5'NT, EC 3.1.3.5) activity was adapted for use with rat samples on a large discrete clinical chemistry analyzer. The precision of the method was good (within-run C.V. = 2.14%; between-run C.V. = 5.5%). A comparison of the new automated method with a manual and semi-automated method gave regression statistics of y = 1.18X -3.66 (Sy. x = 4.54), and y = 0.733X + 1.97 (Sy. x = 1.69), respectively. Temperature conversion factors provided by the kit manufacturer for human samples were determined to be inaccurate for converting results from rat samples. Analysis of components contributing to normal variation in rat serum 5'NT activity showed age and sex to be major factors. Increased serum 5'NT activity was observed in female rats when compared to male rats beginning at about 5 to 6 weeks of age. An analysis of variance of serum 5'NT, alkaline phosphatase, and GGT activities observed over a 9-week period in normal rats suggests several advantages for 5'NT as a predictor of biliary lesions in rats.     

河北农业大学高水平科技论文统计与分析

采用统计分析的方法,对河北农业大学2003--2007年被美国三大英文检索系统收录（SCI、EI、ISTP）和河北农业大学认定的一级学报上发表的学术论文,按总量,学院分布,论文作者年龄、职称、学位分布情况逐一进行了统计分析。分析结果从一个侧面反映了河北农业大学科学研究现状,并对其有关问题进行了探讨。     

Priority habitats for the conservation of large river fish in the Ganges river basin

• 1. Three classes of habitat used by groups of fish species classified as conservation and management priorities were developed for the Gerua River (also known as the Girwa River, Karnali River) in the Ganges river basin. This river is large (mean annual discharge ca 1500 m³ s^?1, up to 900 m wide), surrounded by protected lands of India and Nepal, and upstream of major diversions and river alterations.
• 2. Fish and habitat sampling was conducted at 45 sites from 2000 to 2003. Data were analysed for 2172 fish of 14 species. Species and life stages found occupying a statistically distinct subset of the river habitats were grouped to identify classes of river habitat for conservation.
• 3. Most species and life‐stage groups specialized on specific habitat conditions revealed by multivariate analyses of variance and a principal component analysis. The most numerous and diverse group (six species, 15 life stages) was associated with deep depositional habitats with sandy substrate. Two species covering three life stages were primarily oriented to erosional habitat marked by fast current velocity with pebble and cobble substrate. A third group of three species of adults and juveniles were intermediate in habitat use.
• 4. River conservation for fish faunas should maintain both erosional and depositional channel habitats with depths, substrates, and current velocity inclusive of the ranges reported. The erosional and depositional nature of the key habitats requires that rivers be maintained with flows capable of channel‐forming functions.

Copyright © 2006 John Wiley & Sons, Ltd.     

我国红树林研究人员统计与分析

以1989～2005年《中国期刊全文数据库》、《中文科技期刊数据库》收录的红树林研究文献为依据,采用文献计量学的方法,对我国红树林研究人员的地区分布、人员数量及文献量的年际变化、核心作者群、核心机构、核心期刊等方面进行统计与分析。     

新疆艾比湖流域植物区系研究

艾比湖流域目前生态环境问题很严重,突出表现在:盐尘暴天气增多、艾比湖湖面缩小、沙漠化、生物多样性降低、水资源利用不合理、水体污染等。这些对天山北坡经济带会产生威胁,所以对艾比湖流域进行生物多样性研究有重大意义,是非常必需的。对此我们在艾比湖流域进行野外调查,并整理和鉴定植物标本,艾比湖流域共有高等植物1178种,隶属79科440属,其中蕨类植物7科,9属,15种,裸子植物3科,4属,7种,被子植物69科,427属,1156种,其中有2个特有种:艾比湖桦(Betula ebinuricum),艾比湖沙拐枣(Calligonum ebi-nuricumIvanova)。对艾比湖流域的植被进行了地理区系成分分析,结果表明:艾比湖流域治污区系成分复杂,分属于20个类型,以中亚成分、欧亚成分和北温带成分占优势,表明新疆种子植物区系特征与本地区所处的气候带、地理位置及其地史变迁是一致的。这可为艾比湖流域生物多样性研究、生物资源的合理开发和流域生态环境治理提供参考依据。     

基于空间数据库的林分生长模型的研究

将林分作为研究对象,以森林二类调查数据和相关图形为基础数据资料,选择林分生长模型,运用ScanIn地图矢量化软件系统进行专业的矢量化,借助于GIS相关软件建立属性数据库与图形数据库并运用ID连接,用二次开发语言VB编程开发功能,形成林分经营管理空间数据库,力求实现计算机分析、预测功能的更准确、更切实、更科学。同时,将此思路付诸于现实林分管理中,为科学地管理森林、经营森林、规划森林提供有效的帮助。     

暴发高致病禽流感疫区鸟类禽流感的血清学调查

本研究应用血凝抑制试验(H I),2004年初H 5亚型禽流感在中国内地发生前后,于湖北、广西二疫区市县的生态系中,自健康的鹰、鸽子、野鸭和鹌鹑中采集了54份血清,对其进行了血清学检测,并将获得的血清学检测数据进行了统计学分析。分析结果显示,在总共采集的54份血清样品中,抗H 6亚型禽流感病毒(H 6)抗体、抗H 9亚型禽流感病毒(H 9)抗体、抗H 5亚型禽流感病毒(H 5)抗体阳性率分别为64.8%、75.9%、29.6%。推断,这一时期,H 6亚型禽流感病毒(H 6)、H 9亚型禽流感病毒(H 9)和H 5亚型禽流感病毒(H 5)共循环于该生态系中,其中H 9、H 6亚型禽流感病毒长期、稳定循环于该生态系中,为该生态系禽流感主要流行血清型。血凝抑制试验检测结果发现,H 5亚型禽流感病毒抗体滴度较低,最高仅为640×,其阳性率为29.6%,推断其可能为新近传入的病毒或新近重组变异出现的新病毒,可能为与该次禽流感暴发相关的新病毒,这一推断还有待于通过对病毒基因序列的分析而做进一步验证。     

提高电子资源利用率的宣传案例分析

本文结合南京师范大学图书馆的实际工作分析影响电子资源利用率的因素,提出几种提高电子资源利用率的做法,从电子资源使用统计来看,这些做法比较有效.     

An Expert Knowledge-acquisition Method on Line of Automatic Excluding Errors

Aimed at soving the problem existing in the knowledge-acquisition directing-operation expert systems, a new method is proposed to acquire knowledge of expert-operation, excluding errors existed in examples and reinforce the accuracy of examples,the goal of knowledge acquisition can be achieved, the method presented in this paper solves the problem of self-enhancement of expert knowledge on line efficiently.