吐鲁番市13个品种桑树叶的营养和活性成分分析与评价

为明确吐鲁番市桑叶的营养和活性成分含量,促进桑叶资源的开发利用,以13个桑树品种为研究对象,测定了叶片中游离氨基酸、可溶性固形物、叶绿素、VC、花青素、生物碱、β-胡萝 卜素、黄酮苷、褪黑激素、总多糖、总酚、γ-氨基丁酸和类黄酮含量,并采用主成分分析和聚类分析方法对桑叶品质进行了综合评价.结果表明,13个不同品种桑叶的营养和活性成分存在一定程度的差异.品质综合得分排序为:药桑＞无核大10＞黑桑＞白桑＞台湾长果＞育711＞嘉陵30＞龙桑1号＞大青条＞强桑1号＞粉桑＞公桑＞选792,聚类分析将供试的13个桑树样品划分为5大类,各品种间在营养指标上有较大差异.由主成分分析综合评分得出,药桑、无核大10、黑桑、白桑、台湾长果等品种桑叶品质较佳.     

Corner Point Detection Based on Adaptive Line Approximation

The detection of corner points is one of the basic problems of computer vision. Usually the key question of detecting corner points is how to calculate curvature. This paper presents a novel approach of calculating the backward and forward direction of reference point based on the adaptive line approximation. Our line approximation method objects minimize the distance error and the length of approximation widow adaptively changes with the approximation error. Our adaptive method finds a compromise between the length of approximation widow and the calculation precise. The experiments results show, the method can robustly, effectively and precisely locate corner point for curves with apparent corners with little computation.     

And/or Dag Method in Dynamic Design and Maintenance of Data Warehouse

A data warehouse (DW) is taken as a set of materialized views defined over base relations. It is dynamic entity that evolves continually over time .As time passes, new queries can be made into new views to be added to the DW. Data Warehouse is expressed as and/or dag can describe the relations between queries in DW preferably. Thus, the design of DW can simulate the problem of state space search, relevant exchange rule may define state exchange rule. It can achieve the dynamic design of DW by exchanging and predigesting of state space search. A dynamic design way is proposed to add the new views to the DW by an example.     

Design of Manufacturing System for Business

In the new environment, product development is the core of product innovation and quickly responsive to the market for the enterprises. The speed and effectiveness of development is the key factor to the success of product development. The design for business is the key technique in achieving the effectiveness of product development. And manufacturing system is the bridge between business and products. The design method of facing business is discussed, and the design flow and content of manufacturing system supporting facing business are pointed out. At the same time, the author also sets forth the construction definition, the construction design and the detailed design of the manufacturing system. So the design flow of manufacturing system facing business is established.     

Walsh Sequences Generation with Rademacher Functions and Its Digital Realization

This paper first discusses the application of Walsh sequences in the forward link and the reverse link of the IS-95 system. The advantages and disadvantages of each way generating Walsh sequences are analyzed. The theory and step of using Rademacher function to construct Walsh sequences is discussed especially. Then a way of generating Walsh sequences with CPLD is presented and the Design is described by VHDL on CPLD chip. This way mostly relays on digital logic operation, so it can be realized easily through digital circuit and it needs little memory unit. The result of emluator makes clear this way is feasible.     

试论黑龙江省林区庭院经济的发展

庭院经济是以家庭为单位,以庭院为基地,以商品生产为目的,充分发挥庭院三维空间优势的一种经济模式.其突出特点是:投资少,见效快,风险小,转向快,能耗低,门路广.在相对较小的环境域中,通过合理、巧妙地配置场地、空间和时间等生产要素,高效利用各种自然资源和社会资源,可取得较大的经济效益、社会效益和生态效益.     

新世纪国际农业科技界关注的焦点

当前国际农业科技界关心的问题和重要论点主要集中在以下 7个方面 :1.目前农作物的最高单产水平是否已接近所谓“生理极限”?应采取什么技术路线和对策 ?是以缩小现有水平同极限潜力之间的差距为主 ,还是通过遗传和生理方面的努力 ,进一步提高潜力 ?2 .农业生物技术除了能够改良抗逆、抗病虫以及改善品质外 ,能否最终对提高单产这一最重要的“数量性状”作出大的贡献 ?3.信息技术在改造有史以来就一直是分散和经验型的传统农业方面 ,到底还能有多大的潜力和作为 ?4 .农作物增值还有何种新途径 ?5.关于实现“环境友好”型可持续农业途径的探…     

全光照喷雾扦插繁殖红枣试验

哈密大枣是哈密地区特有的优良经济树种，由于它核小、个大、皮薄、肉厚、营养丰富，色泽鲜艳，被誉为果中精品，与哈密瓜一样享誉海内外，并于１９８４年被自治区列为全疆各地州发展的已栽品种和重点推广品种之一。由于枣树插条极难生根，而传统的育苗都是以根蘖嫁接的方...     

纸筒甜菜试验示范

0 引言`甜菜是制糖业的主要原料.1991年博州引进甜菜育苗技术,小面积单产可达6 t/667m2以上(毛菜),由于费工,大面积的种植农民不易接受.1996年以后,地膜种植在博州大面积推广,增产效益显著,但是白色污染严重.为了进一步研究纸筒甜菜育苗技术的增产效益,2008年我们在温泉县哈日布呼镇哈日布呼村进行了试验示范,面积8(667m2).