Theoretical and Empirical Analysis on Influence Factors of Modern Agricultural Equipment Level in the Process of Agricultural Sustainable Development

Abstract

To promote modern agricultural equipment level is one characteristic of constructing and developing modern agriculture in China. This paper makes up stepwise linear regression analysis model of influence factors of modern agricultural equipment level, and chooses rural labor, per capita income of rural residents, rural investment, proportion of people at secondary education level and at higher level in per hundred rural labor force and arable land area as independent variables, and total power of machine as induced variable. The major results show that the relativity of modern agricultural equipment level, rural investment and education level of peasants is remarkable, and they are the major influence factors of modern agricultural equipment level. Raising investment level of rural infrastructure construction as well as and research and development and promotion of advanced and applicable modern agricultural equipment, improving quality and education level of peasants can accelerate the development of China’s modern agricultural equipment effectively in the process of agricultural sustainable development.     

工业化水平区域差异与中国能源消费

在对30个省区工业化水平进行了聚类分析的基础上，描述了工业化水平的区域差异。通过对中国煤炭、石油两类非可再生能源的消费在区域工业增长中的判别分析，探讨了区域工业化水平对能源消费水平的影响。这种影响以工业能源密度为动因，促成了区域工业化水平与能源消费总量水平的一致性和差异性。研究结果表明：工业能源密度的降低和能源效率的改进有利于工业化水平提高。     

中梁山煤矿北矿瓦斯泵房噪声治理

本文对分布面广而复杂的瓦斯泵房噪声源进行了测试和深入的分析,采用综合治理的方法使居民区噪声达到了国家城市环境噪声标准的要求,瓦斯泵房内降噪显著,取得了理想的治理效果。     

IEC61511标准及在石化行业安全管理中的应用

功能安全的定量评定技术已成为确保石化行业安全生产的重要手段。针对石化行业普遍存在的功能安全问题,笔者以国际电工学会(IEC)专门制定的功能安全评定标准IEC61508及IEC61511为指导,介绍其标准制定的背景、目的、体系结构以及如何利用标准开展石化行业安全联锁系统(Safety Instrumented System,SIS)的安全与误跳车定量分析。通过对SIS开展定量安全评估,可发现联锁功能存在的安全不足与误跳车现象,对于提高我国石化行业安全生产水平具有重要的促进作用,标准中有关寿命周期功能安全管理方法及重要的工程经验也对提高我国石化安全生产水平具有借鉴作用。     

Field‐Scale Application of Three Types of Neural Networks to Predict Ground‐Water Levels1

Abstract: In this paper, a field‐scale applicability of three forms of artificial neural network algorithms in forecasting short‐term ground‐water levels at specific control points is presented. These algorithms are the feed‐forward back propagation (FFBP), radial basis networks (RBN), and generalized regression networks (GRN). Ground‐water level predictions from these algorithms are in turn to be used in an Optimized Regional Operations Plan that prescribes scheduled wellfield production for the coming four weeks. These models are up against each other for their accuracy of ground‐water level predictions on lead times ranging from a week to four weeks, ease of implementation, and execution times (mainly training time). In total, 208 networks of each of the three algorithms were developed for the study. It is shown that although learning algorithms have emerged as a viable solution at field scale much larger than previously studied, no single algorithm performs consistently better than others on all the criteria. On average, FFBP networks are 20 and 26%, respectively, more accurate than RBN and GRN in forecasting one week ahead water levels and this advantage drops to 5 and 9% accuracy in forecasting four weeks ahead water levels, whereas GRN posted a training time that is only 5% of the training time taken by that of FFBP networks. This may suggest that in field‐scale applications one may have to trade between the type of algorithm to be used and the degree to which a given objective is honored.     

汽车工业中的功能安全研究

介绍了汽车工业中的电气/电子/可编程电子系统,分析了早期汽车生命周期过程、汽车开发和安全的集成过程以及汽车功能安全生命周期的组成,研究了从IEC61508功能安全转变为适用于汽车工业的安全标准的过程,阐述了汽车功能安全中的一些重要概念,给出了汽车功能安全分析的几种方法及其优缺点。     

Mexican High Rubber Producing Guayule Shrubs: A Potential Source for Commercial Development

Guayule is a shrub native to Mexico growing in semiarid lands, that may be incorporated into the semiarid region production system as a complement for annual crops. The possibility to develop this natural resource as a sustainable industrial source of natural rubber, may improve the socio-economical level of people living at the guayule region and favor the agricultural development near the US-Mexico border. Despite the existence of natural stands in Mexico with guayule plants of different rubber content, a program envisaging selection of plants with high rubber synthesis potential joined to agronomic management practices are required. This could achieve the rubber yield needed to guarantee a constant supply of raw material for an industrial processing plant. This paper reviews R&D work carried out in Mexico for the last 25 years, including genetic aspects and evaluation of guayule response to environmental and agronomic factors. Relevant results showed plants with up to 21% rubber content and the existence of diploid plants, which could facilitate future plant breeding programs.     

浅析高校评估对档案工作的要求和作用

高等学校人才培养工作水平评估,是促进高等学校改革的重大举措.评估深化了教育体制改革,强化和完善了规章制度,提高了教学质量,优化了师资队伍.档案工作是评估的基础之一,有重要的作用,同时评估对档案工作也提出了新的要求,促进了学校档案工作的发展,使其更加规范化、科学化,也提高了档案工作者的素质.     

对消防经济学理论与方法研究框架的探讨

本文分析了国内外消防经济学的研究概况，从宏观和微观两个方面对消防经济学的研究框架、基本理论与方法等进行了全面论述，并对我国消防经济学韵研究及应用前景进行了展望。目的在于为填补我国在该研究领域的空白提供探索性的指导。     

世界经济掀起绿色浪潮国际环保市场充满商机

本文介绍了发达国家绿色产业发展的现状及趋势,预示绿色产业在国际环保市场的领先潮流。我国要顺应这绿色潮流,提高我国环保产业在国际市场上的竞争力。