松属植物的松塔、松子壳药用开发

目的:为了对云南省的松树资源进行药用开发,就松塔国内外研究进展作一综述.方法:查阅国内外有关文献资料加以综合归纳.结果:日本白松松塔提取物是有效免疫促进剂;还发现松塔提取物的抗癌抗艾滋病作用很强.预示松塔提取物可能成为艾滋病的理想治疗剂.结论:进一步研究开发利用该植物具有广阔前景.     

陕西省果树主要有害生物调查及综合防治对策

在对陕西果树病虫害种类进行系统调查的基础上,针对其发生危害特点提出了综合防治措施,为减轻病虫危害,保护水果产业稳定发展提供技术指导.     

Out-of-Bounds Array Access Fault Model and Automatic Testing Method Study

Out-of-bounds array access(OOB) is one of the fault models commonly employed in the objectoriented programming language. At present, the technology of code insertion and optimization is widely used in the world to detect and fix this kind of fault. Although this method can examine some of the faults in OOB programs, it cannot test programs thoroughly, neither to find the faults correctly. The way of code insertion makes the test procedures so inefficient that the test becomes costly and time-consuming. This paper, uses a kind of special static test technology to realize the fault detection in OOB programs. We first establish the fault models in OOB program, and then develop an automatic test tool to detect the faults. Some experiments have exercised and the results show that the method proposed in the paper is efficient and feasible in practical applications.     

Effects of nitrogen sources and glucose on the consumption of ethylene and methane by temperate volcanic forest surface soils

There is limited knowledge with regard to the consumption of ethylene (C2H4) and methane (CH4) in volcanic forest soils containing low microbial carbon-to-organic carbon ratio, and to the responses of both consumptions to nitrogen and carbon additions. Temperate volcanic forest surface soils under three forest stands (e.g. Pinus sylvestris L., Cryptomeria japonica and Quercus serrata) were used to compare CH4 and C2H4 consumption by forest soils, and to study the effects of nitrogen sources and glucose on both consumptions. There was a good parallel between CH4 and C2H4 consumption by for- est soils, but mineralization reduced CH4 consumption rather than C2H4 consumption in forest soils, particularly in a Pinus forest soil. The stimulatory effect of glucose addition on both CH4 and C2H4 consumption by forest soils was increased by increasing the pre-incubation period after glucose addi- tion, and a largest stimulation occurred in the Pinus forest soil. The addition of KNO3-N at the rate of 100 μg·g1 significantly reduced the consumptions of both C2H4 and CH4 by forest soils (P≤0.05). In the presence of urea plus dicyandiamide, the consumption rates of C2H4 and CH4 by forest soils were higher than those in the KNO3-N and urea-N treated soils at the same N rate (P≤0.05), but were similar to those of the control. Hence, under experimental conditions, there was a strong inhibitory effect of NO3 rather than NH4 addition on the CH4 and C2H4 consumption in these forest soils. When amount of the added NO3-N increased up to more than 2―3 times the soil initial NO3-N concentrations, both C2H4 and CH4 consumption rates were reduced to 10%―20% of the rates in soils without nitrate addition. By comparing the three forest stands, it was shown that there was a smallest effective concentration of the added nitrate that could inhibit C2H4 and CH4 consumption in the Pinus forest soil, which indicated that C2H4 and CH4 consumption of the soil was more sensitive to NO3-N addition.     

数据挖掘中决策树算法的探讨

随着数据量的增长,根据数据分布寻找规律,要借助于相应的数据挖掘工具,这里主要采用决策树的方法.决策树算法是通过构造精度高、小规模的决策树采掘训练集中的分类知识.针对决策树存在的一些问题,提出了改进方法.     

树木年轮分析在环境监测中的应用进展

阐述树木年轮在环境中应用的基本原理，综合分析树木年轮分析在环境监测中应用的发展历程和最新进展，通过研究实例扼要综述树木年轮在大气痕量金属沉降的监测、水体和土壤重金属沉降的监测、有机污染物的推断和人工合成放射性元素的调查研究中的重要领域，探讨树木年轮研究存在的不足、难以解决的问题及可能改进的途径。认为今后利用树木年轮研究环境变化的重要领域是树木逆境条件下生理特性的基础理论研究、污染元素时空分异规律的研究、污染元素进入树木体内动力学过程及其与环境相关性的研究，以及多学科交叉、与其他环境信息源记录的比较研究。     

树的度距离排序

讨论树的度距离排序问题 ,确定了这个序中前四个树及其相应的度距离     

复杂对象模式的规范化设计

该文给出了复杂对象模式的规范化设计。复杂对象模式的规范化设计不仅是将对象组合到相关联的关系中，而且要选择一个能很好地表示对象间的语义关系的结构。首先，基于对象间的语间关系，定义对象依赖；然后定义对象范式－－规范化对象模式树和规范化对象模式森林，并且讨论对象范式的特性，指出规范化对象模式森林是所要求的复杂对象模式的结构；最后给出了导出规范化对象模式森林的MIMI算法。     

狮子关库区植物群落乔木层优势种及群落分类

对狮子关库区植物群落乔木层优势种及群落分类进行了研究，结果显示：库区乔木层优势种19种，包括常绿阔叶树7种、落叶阔叶树10种、针叶树2种。据此，库区有5个植被型17个群系34个群丛。     

中国民间故事结构形态论析

中国民间故事的情节结构较为繁复,母题富于流动性,素为中外学人所关注。从历史文化内涵、文学传统和审美意趣等方面对这一形态特征的构成进行探讨,可以探寻到中国民间叙事艺术的民族特色。