濒危药用植物金毛狗的栽培技术研究初探

研究金毛狗植株的块茎在原生境腐殖土和MS培养基中的繁殖技术．将处理后的金毛狗块茎接入配备好的培养基中,观察其生长状况．结果表明,用MS培养基暂时无法繁殖金毛狗植株,主要原因在于金毛狗的褐变,而原生境腐殖土可以栽培金毛狗植株．     

Diversity arrays technology (DArT) for studying the genetic polymorphism of flue-cured tobacco (Nicotiana tabacum)

Diversity arrays technology (DArT) is a microarray-based marker system that achieves high throughput by reducing the complexity of the genome. A DArT chip has recently been developed for tobacco. In this study, we genotyped 267 flue-cured cultivars/landraces, including 121 Chinese accessions over five decades from widespread geographic regions in China, 103 from the Americas, and 43 other foreign cultivars, using the newly developed chip. Three hundred and thirty polymorphic DArT makers were selected and used for a phylogenetic analysis, which suggested that the 267 accessions could be classified into two subgroups, which could each be further divided into 2–4 sections. Eight elite cultivars, which account for 83% of the area of Chinese tobacco production, were all found in one subgroup. Two high-quality cultivars, HHDJY and Cuibi1, were grouped together in one section, while six other high-yield cultivars were grouped into another section. The 330 DArT marker clones were sequenced and close to 95% of them are within non-repetitive regions. Finally, the implications of this study for Chinese flue-cured tobacco breeding and production programs were discussed.     

Choosing between the theory of planned behavior (TPB) and the technology acceptance model (TAM)

Educational technology research and development - Conflicting perspectives exist regarding the application of the technology acceptance model (TAM) and the theory of planned behavior (TPB) to the...     

汽车ABS控制技术与发展

介绍了汽车防抱死制动系统ABS的历史与发展,以及ABS的构成和单轮制动原理,论述了国内外常见的ABS控制策略,并分析了ABS整车稳定性控制,最后结合汽车电子技术的发展,探讨了车载ABS的扩展功能.     

OBD技术的现状与未来

全面回顾了OBD技术的发展历史,详细地介绍了目前在用的OBDⅡ技术,对在研的OBDⅢ技术也做了扼要介绍,最后给出了OBD技术未来发展的趋势.     

基于Matlab的网格编码调制技术(TCM)的仿真实现

TCM是集编码与调制于一体的技术,本文以8PSK系统为例,论述TCM编码器、译码器的仿真实现,并对结果进行分析比较。     

虚拟现实技术在地理野外实习中的应用

虚拟现实技术的卓越三维显示和动态交互能力,为地理野外实习提供了新的研究手段和方向。分析了现在地理野外实习中遇到的问题,提出了虚拟地理实习的构想,探讨了虚拟地理实习设计的总体框架和具体关键技术,结合实例阐述了虚拟地理野外实习的优越性,并讨论了虚拟地理实习与实地野外实习的关系。