伊犁河流域土壤Cu、Zn、Pb地球化学基线值估算与研究

为了给伊犁河流域土壤提供判别自然或人为事件造成的环境扰动标准,通过对伊犁河流域土壤的系统采样分析,采用标准化方法（以Fe作为标准元素）估算伊犁河流域灰钙土、栗钙土、黑钙土、盐碱土4种不同土壤类型的Cu、Zn、Pb 3种金属元素的地球化学基线值。结果表明：同一种重金属元素的地球化学基线值有较大差异;其中,灰钙土中Cu、Zn、Pb的土壤地球化学基线值分别为51.2、77.3、25.7 mg/kg,栗钙土Cu、Zn、Pb分别为58.6、73.8、23.3 mg/kg;黑钙土Cu、Zn、Pb分别为53.1、62.7、41.7 mg/kg;盐碱土Cu、Zn、Pb分别为42.6、55.1、40.8 mg/kg。标准化方法能够较好地估算伊犁河流域土壤中Cu、Zn、Pb地球化学基线值,为了解地表环境污染及恶化程度、预测和监测全球变化效应与环境变化提供了基础。     

可否用土地承包经营权抵债

律师同志： 　　准备举家外迁的村邻王某，欠我二千元钱，他准备把自己承包的二十亩耕地转让给我，让我承包经营，用以抵偿他欠我的钱款，不知法律是否允许 ?     

An Empirical Study on the Relationship between Economic Growth and Financial Development

This paper discusses the relationship between financial development and economic growth. Some essential Chinese macroeconomic datum during late twenty years which include Gross Domestic Product (GDP) of the whole economy,state and private sectors,investment in fixed Assets,financial relative rate and real interest rate estimated in a multivariate vector auto regression (VAR) framework. The estimates suggest that financial development boosts GDP growth, and it does not exist in reverse.     

Innovating Method of Mechanism Configuration Project Based on Kinematic Chain

The structure design is the most crucial and innovative one in the process of mechanism system design, and attention is constantly given to them. Although the various methods of structural synthesis are presented, more study due to faultiness of them are essential. All of available configurations of the single joint kinematic chain are gotten by replacing its pairs. On the basis of symbolization of pairs, the authors put forward the mathematic approach of permutation and combination by which all of configurations of the kinematic chain can be obtained, structure graph is used to judge the type of same fabric of the kinematic chain. Finally their application examples in engineering are given.     

浣ㄖ幕牡赜蛐浴⑸砸约懊

庑┨匦?以促进传统文化和地域特色的保护工作,推动地域创作之路的发展。Zoned architectural culture analysis based on the national architecture in Guangxi autonomous zoneGUO HongBased on the traditional zone folk houses,it analyzes the zone,zoology,nat     

浅析草原蝗虫生物防治技术

草原、森林是人类重要的生态防御系统,而我国草原也是最大的陆地生态系统。本文就围绕着草原蝗虫,探析一些关于蝗虫的生物防治技术。     

无公害苜蓿高产栽培技术

本文介绍了苜蓿高产栽培管理技术,包括播前准备、播种技术、田间管理、病虫害防治、适时收获和最佳留茬高度、提高苜蓿安全越冬率以及翌年返青后的田间管理等内容,为无公害苜蓿的推广种植提供技术参考.     

基于纤毛鹅观草特异的卫星重复序列开发寡核苷酸探针

[目的]本文旨在开发纤毛鹅观草特异的寡核苷酸（oligonucleotide, oligo）探针,进一步完善纤毛鹅观草染色体鉴定技术。[方法]利用前期选育的普通小麦-纤毛鹅观草异附加系DA2S^cL和DA6S^c,通过流式分拣和基因组二代测序获得纤毛鹅观草染色体6S^c和染色体臂2S^c长臂的基因组序列,利用Repeatexplorer2/TAREAN软件从中鉴定出卫星重复序列并设计成oligo探针,通过荧光原位杂交（fluorescence in situ hybridization, FISH）分析所开发oligo探针的应用价值。[结果]从6S^c和2S^cL基因组序列中共鉴定出11个卫星重复序列并开发成11个oligo探针,oligo-FISH结果表明,其中6个探针可以在纤毛鹅观草染色体上产生明显杂交信号,而在小麦染色体上未产生明显杂交信号,可用于特异鉴定小麦背景中的纤毛鹅观草染色体或片段。对1套普通小麦-纤毛鹅观草异附加系oligo-FISH分析发现,olig...     

Application of Global Position System in Measuring Signal Frequency and the Stability of Signal Frequency

Crystals with high stability are generally adopted as benchmark in the measurement of signal's actual frequency and stability, but the requirement of high precision can not be met. Some researchers found out improved methods, but it resulted in high costs. We introduce a new method, in which we use the second pulse creating from Global Position System as benchmark and design corresponding circuits in High Density Programmable Logic Devices(HDPLD), after that, we observe the resulting signals on oscilloscope. The pulse from Global Position System is easy to get and the whole system is very cheap. As the Global Position System is based on atomic clock which is accurate and stable, the measuring precision is improved greatly.