煤气混合流量配比及热值串级模糊控制系统

文中将模糊控制技术运用到煤气混合串级调节系统中,介绍了系统的构成、原理及控制算法,有效地实现了混合煤气热值的检测和控制。     

A variety of epistatic interactions can occur between partially homologous transgene loci brought together by sexual crossing

Epistatic interactions between unlinked transgene loci in tobacco plants were studied following sexual crosses between different transgenic lines. Three potential "modifier" transgene loci, which were structurally similar but integrated at different chromosomal locations, were tested for their ability to influence the expression of a partially homologous "target" transgene locus. After introduction of an individual modifier locus, the target locus could be either unaffected, completely inactivated and methylated or differentially sensitive, showing more complete inactivation and methylation when homozygous than when hemizygous. The implications of these results for inbreeding depression in plants are discussed.     

The morphological mechanism of the development of myosatellitocytes from the structural elements of the muscle fiber during increased functional activity of the skeletal muscles

Under increased muscular activity in some muscular fibers disintegration areas of myofibrillar apparatus has been revealed. Migration of myonuclei into these microregions starts the mechanism of their segregation due to plasmolemma produced from the reticulum sarcoplasmaticum and triad systems surface. After plasmolemma production in "sarcocytes" intensive development and differentiation of organellae occur. As a result of differentiation "sarcocytes" transform in to myosatellitocytes of type-2 and migrate under lamina externa muscular fibers. So, a hypothesis about formation of myogenic tissue's cellular phase from the myosymplastic one has been confirmed.     

洪水预报与数值模拟技术在城市防洪中的应用——以浑河沈阳城市段为例

对城市防洪、非工程措施、洪水预报与数值模拟技术的重要性进行阐述,结合浑河沈阳城市段分别从预报方案和预报系统技术对系统的功能结构进行归纳总结。同时,介绍了数值模拟技术在城市防洪中的应用情况,提出具有继承性和发展性自动化系统解决方案。应用该系统妥善解决了浑河防洪减灾中原有存在的疑难问题,为浑河防洪减灾工作提供全面支持。     

电力联营市场的统一出清报价模型分析

介绍在电力联营市场的模式下基于拉格朗日最优原理的统一出清电价模型,以不同的市场参与竞价机组组合分析系统边际价格的计算步骤,通过算例分析这种报价方式存在的问题,并以市场力指标计算示例中市场力的影响结果,分析存在的问题和解决的方法。     

汽车变速箱主要参数设计系统的开发

变速器是汽车传动系统的主要组成之一.变速器设计的关键是主要参数的确定,由于涉及的公式计算多、比较繁琐,所以在分析其主要参数确定依据的基础上,基于VC++开发了汽车变速箱主要参数设计系统,以期降低计算的复杂性,为变速器的开发提供参考.     

鄂尔多斯盆地东南部长7油层组沉积相研究

为了明确鄂尔多斯盆地东南部长7油层组沉积体系类型和沉积相展布特征,总结其沉积演化规律,以沉积学的基本原理和方法为指导,综合运用地球化学、盆地分析等理论和方法,通过野外露头、钻井、测井等资料的综合分析,认为鄂尔多斯盆地东南部长7油层组主要发育三角洲和湖泊沉积体系,可进一步划分为3类亚相,其中以三角洲前缘和深湖2种亚相为主．     

Buckling of carbon fiber composite pyramidal truss core sandwich columns

This paper deals with the theoretical prediction of global buckling loads for carbon fiber composite pyramidal truss core sandwich columns. Different from thin plate structures, transverse shear effect can not be neglected for sandwich structures. In addition, the attributes of the laminated face sheets are considered in the present paper. A zig-zag displacement approximation is made. Based on the principle of minimum potential energy, equilibrium equations and boundary conditions are derived via the variational method. The critical buckling loads under various boundary conditions are presented. In order to validate the reasonableness of the equivalent-core method, the strain energies stored in the actual discrete truss members and the equivalent continuous homogenous core layer are calculated respectively and compared, and a good agreement is obtained. The proposed analytical method is verified by comparing with the published theoretical predictions and experimental results.     

基于图像处理的水位自动测量技术

采用ARM处理器与视频服务器相结合的方法,设计了一种实时水文监测系统,实现了在下位机中提取特征量,继而通过GPRS与上位机进行通讯。该系统利用Wince编程,对采集的图像进行二值化,再利用形态学算法去除非特征量,然后进行边缘细化,利用霍夫变换提取出水位线与河岸线的直线方程进行计算,依据像素间隔与坐标系数的换算关系,求得图像中两者之间的距离,最后利用像素间隔与实际物理坐标换算关系得到物理距离。实验结果表明,该系统具有抗噪、稳定、可靠和实时性强等特点,取得了很好的识别效果。     

论毛泽东关于社会主义矛盾学说的创立及其意义

在《关于正确处理人民内部矛盾的问题》一文中,毛泽东从哲学高度指出了社会主义社会存在两类性质不同的矛盾,首次创立了关于社会主义社会矛盾的学说,本文将以全新的视角,解读其重大理论意义和实践意义,深入研究其理论价值,从而为当代中国构建社会主义和谐社会和全面建设小康社会提供理论支撑．