我国天然植物色素研究与开发初探

就天然植物色素的性质特点，种类及化学结构，提取与纯化，色素资源开发与重点开发对象和存在问题作了简述，为中国天然植物色素研究，开发，利用提供参考。     

城市农业初探

随着城市化进程的加快，城乡一体化成为社会发展的必然趋势，城市农业的出现是历史的必然，是现代农业的发展方向。本文通过对城市农业概念的界定，分析研究城市农业的种类、特征和功能。     

单词的链式基数排序

本文针对英语字典中单词排列的特点和基数排序的思想，将基数排序应用于英语单词排序中。得到了单词的链式基数排序法。     

城镇土地综合定级和分类定级研究--以莒南县城区为例

城镇土地定级是对城镇土地质量和使用效益及其在土地空间上分布差异状况进行评定，为全面地、科学地管理土地，合理利用城镇土地，以及为有关部门制定规划、计划和有偿使用土地提供依据。城镇土地定级分综合定级和分类定级两种。我们对莒南县城区土地进行了综合定级和分类定级，研究不同定级结果的相似性和差异性。研究结果表明，综合定级、商业用地定级和住宅用地定级结果比较接近，工业定级与其它定级相比，差别较大。     

日本落叶松削度方程和林分材种出材率表的研究

本文论述了削度方程的类型及其在研制材种出材率表中的重要意义，结合全林分生长模型，林分自然稀疏模型以及林分结构模型编制了日本落叶松林分材种出材率表。经检验精度符合要求。从而为及时准确地掌握林分的材种结构及变化，进行林分材种结构调整，落实限额采伐森林面积提供了重要的理论依据。     

IDENTIFICATION OF OPTIMUM COMBINATION OF PROPORTION OF VERMICOMPOST IN THE SOIL-BASED POTTING MIX AND POT VOLUME FOR THE PRODUCTION OF PAPER POT SEEDLINGS OF VEGETABLES

An investigation was conducted to identify the best combination of proportion of vermicompost in soil-based potting mix and pot volume for the production of paper pot seedlings suitable for mechanical transplanting. The best combination of the potting mix and pot volume is the one that produces seedlings with high growth of root and shoot biomasses at the end of seedling stage, low in cost and light in weight. Cubical shaped paper pots of 50 cm³ volume filled with potting mix of 25% vermicompost and 75% soil and sand in equal proportion by volume was found to be best for the large scale production of paper pot seedlings of tomato, eggplant, and chili peppers. The paper pots were found to be firm at the end of seedling stage and variations in their dimensions could be accommodated in fully automatic transplanters with horizontal chain conveyor type seedling feeding and metering devices.     

An approach to clarifying public preferences about silvicultural systems: A case study concerning group selection and clear‐cutting

To avoid large clear‐cut areas in recreation areas, three experiments where group selection was used to transform even‐aged stands of Norway spruce (Picea abies (L.) Karst.) into uneven‐aged stands were started. Two of these group selection stands were compared with adjacent forests managed by the clear‐cut system on the basis of the opinion of seven voluntary groups. The respondents have given their judgement of the forest sites in a semantic differential test. All parties made assessments when visiting the forest sites. In addition, two of the groups made assessments of black and white photographs representing the forest sites. The methods used were found to be both reliable and valid. A very low correlation was obtained between the assessment of whole forest areas and the mean value of the assessments of the stands within the same area. According to this study, the group selection method is preferable to clear‐cutting in even‐aged stands of Norway spruce if the attitudes of the voluntary groups are to be met.     

以DB2数据库环境提高数据加工效率的方法

提高DB2数据加工效率需要从优化数据库参数配置、使用游标、优化SQL语句、创建合适的索引、批量提交、更新数据统计信息等入手，只有各方面配套使用，才能达到数据加工的最好效率。     

基于笔划和笔顺的汉字识别算法

以笔划为基元结构笔划的顺序来表示汉字的结构信息，在此基础上提出了一种笔写汉字识虽的匹配算法，对于结构类似的汉字，该算法可以通过特征关系予以识别，从而提高汉字的识别率。     

烤烟B2F烟叶分选质量控制

针对近年来B2F烟叶工商交接等级质量不高的问题,采取人工解把分选的方式进行改善,在分选过程中严格落实"三级质量把关"管理控制模式,事实证明效果显著,分选后霉烟、一类杂物含量为0,二、三类杂物含量得到了有效控制,B2F烟叶等级质量和工业可用性得到了明显提高。