应用声强测试技术对发动机噪声源识别的研究

通过对一台增压柴油机的噪声进行声强测试,将测试得到的数据用STARAcoustics声强软件进行处理和分析,得出发动机各个包络面的等声强分布、声强矢量分布和声功率的计算结果;利用这些结果着重分析和识别了该发动机的主要噪声源,确定了其噪声源的位置、主要噪声频率成分和声功率的贡献,为降低发动机噪声提供了改进依据.结果表明,通过与9点法试验结果的定性比较,能够更准确地判断噪声源的位置及其频率分布.     

基于分幅房产图的土地利用现状信息提取

以《房产测量规范》（GB/T17986.1-2000）标准绘制的分幅房产图为土地调查底图,依《土地利用现状分类》（GB/T21010-2007）标准对房产图上的土地利用现状信息进行提取。详细探讨从分幅房产图上的商业金融业用地、市政用地、公共建筑用地、交通等用地中提取地类信息的归并情况,指出从分幅房产图上提取土地利用现状信息存在的问题为：概念范围界定不统一、相同地类名称不相同、表示信息侧重点不同和精度差异等。为共享资源,节约社会成本,建议统一地类划定标准,多种地图一体化综合测绘等。     

基于MapInfo Professional的林相图制图技术与应用

林相图是承载丰富森林信息的地图,是林业行业的基本用图.针对林相图制图的关键工序,利用MapBasic语言对MapInfo Professional进行二次开发,可以显著提高林相图制图的自动化程度,从而提高工作效率和图面精度.     

基于WebGIS的校园电子地图的设计与实现

随着GIS系统应用的普及,校园电子地图也逐渐得到关注。以某高校为例,设计和实现了具有动态地图操作(如放大、缩小、浏览)功能的万维网校园电子地图。校园电子地图的开发中主要使用的是ArcGIS技术。基于ArcGIS技术开发的校园WebGIS系统,是实现校园空间信息发布与服务的基础平台。     

地方性知识与民族地区生态的可持续发展

指出了地方性知识由于其独特的作用在民族地区生态的可持续发展方面扮演着重要角色,是解决民族地区生态与发展问题的手段之一。通过对民族地区地方性知识在生态保护上的独特优势进行分析,提出了挖掘地方性知识,发挥其生态保护作用的措施。     

航空遥感技术在林改宗地勘界中的研究与应用

指出了在集体林权制度改革中,林地宗地勾绘是核心内容,分析了采用高分辨率大比例尺航空正射影像图与电子矢量化地形图叠加进行林改宗地勘界,研究表明：其技术比传统地形图上勾绘宗地方法更能提高工作效率及勾绘精度。     

Genetic mapping of AFLP markers in Japanese bunching onion (<Emphasis Type="Italic">Allium fistulosum</Emphasis>)

Summary The first genetic linkage map of Japanese bunching onion (Allium fistulosum) based primarily on AFLP markers was constructed using reciprocally backcrossed progenies. They were 120 plants each of (P₁)BC₁ and (P₂)BC₁ populations derived from a cross between single plants of two inbred lines: D1s-15s-22 (P₁) and J1s-14s-20 (P₂). Based on the (P₂)BC₁ population, a linkage map of P₁ was constructed. It comprises 164 markers – 149 amplified fragment length polymorphisms (AFLPs), 2 cleaved amplified polymorphic sequences (CAPSs), and 12 simple sequence repeats (SSRs) from Japanese bunching onion, and 1 SSR from bulb onion (A. cepa) – on 15 linkage groups covering 947 centiMorgans (cM). The linkage map of P₂ was constructed with the (P₁)BC₁ population and composed of 120 loci – 105 AFLPs, 1 CAPS, and 13 SSRs developed from Japanese bunching onion and 1 SSR from bulb onion – on 14 linkage groups covering 775 cM. Both maps were not saturated but were considered to cover the majority of the genome. Nine linkage groups in P₂ map were connected with their counterparts in P₁ map using co-dominant anchor markers, 13 SSRs and 1 CAPS.     

A high-resolution map of the rice blast resistance gene Pi15 constructed by sequence-ready markers

The gene Pi15 for resistance of rice to Magnaporthe grisea was previously mapped to a ≈0.7-cM region on chromosome 9. To further define the chromosomal region of the Pi15 locus, a contig spanning the locus was constructed, in silico , through bioinformatics analysis using a reference sequence of the cultivar 'Nipponbare'. One simple sequence repeat marker adopted from the International Rice Microsatellite Initiative and six candidate resistance gene (CRG) markers, developed from gene annotation of the reference sequence of the contig, were used for linkage analysis in a mapping population consisting of 504 extremely susceptible F₂ plants. The Pi15 locus was delimited to a ≈0.5-cM region flanked by the markers CRG5 and CRG2 and co-segregated with the markers BAPi15₇₈₂, CRG3 and CRG4, which was physically converted to a 44-kb interval.     

直接扩增甜瓜小卫星DNA指纹图谱

以小卫星DNA YNZ22核心序列为引物,甜瓜DNA为模板,在甜瓜上研究了直接扩增小卫星DNA(DAMD)的优化反应体系,结果表明:在20μL的反应体系中,5种主要成分Taq DNA聚合酶、Mg2 、引物、模板DNA和dNTPs的最适浓度分别为1U,2.5 mmol/L,0.5 mmol/L,30 ng,5 mmol/L。在优化的DAMD-PCR反应体系下,利用该引物在28个甜瓜品种上构建了直接扩增小卫星DNA(DAMD)的指纹图谱,分析结果表明,该引物在28个甜瓜品种上共扩增出13位点,其中9位点具有多态性,多态性条带比率为69%,可一次性从28个甜瓜品种中鉴别出其中的21个,鉴别率高达75%。     

QTL mapping of resistance in lentil (Lens culinaris ssp. culinaris) to ascochyta blight (Ascochyta lentis)

Quantitative trait locus (QTL) analysis of ascochyta blight resistance in lentil was conducted using genomic maps developed from two F₂ populations, viz. ILL5588/ILL7537 and ILL7537/ILL6002. Five QTLs for ascochyta blight resistance were identified by composite interval mapping (CIM) across four linkage groups (LG) in population ILL5588/ILL7537. Three QTLs were identified by CIM in population ILL7537/ILL6002 (two in close proximity on LGI and one on LGII). Two of these coincided with regions identified using multiple interval mapping (MIM) and were shown to be conditioned by dominant and partial dominant gene action. Together, they accounted for approximately 50% of the phenotypic variance of disease severity. Comparison between the two populations revealed a potentially common QTL and several common regions that contained markers significantly associated with resistance. This study demonstrated the transferability of QTLs among populations and identified markers closely linked to the major QTL that may be useful for future marker‐assisted selection for disease resistance.