Banach空间一阶周期边值问题的混合单调方法

研究Banach空间中一阶周期边值微分方程解的存在性。对适合混合单调过程的一类函数，利用上下解的混合单调方法证明了解的存在性，推广了已有的结果[4]。     

黄牛皮劳保鞋面革的制作要点

论述了黄牛皮劳保鞋面革的制作要点。     

从美、英两国的电信资费管制看我国现行电信资费管制的不足

文章介绍了美、英两国在电信资费管制制度的发展历程，阐述了美、英两国在现行的资费管制制度一价格上限制度并从美、英两国的资费管制经验中发现我国现行资费管制制度存在的不足之处，加以改进。     

厚松散层下近风化带保水采煤的GIS研究

煤炭和水都是人类生存和发展的宝贵资源．兖州矿区厚松散层下近风化带的煤炭开采一方面受到第四系下组水的威胁，同时还涉及到第四系下组水资源的合理保护问题。本以兖州市杨庄矿为例，建立了GIS数据库和图形库，通过GIS多因素拟合建立了近风化带覆岩采动破坏“两带”高度的预计模型，提出了考虑保护层的开采上限GIS决策模式，用于保水条件下的安全煤柱留设设计。     

恒力弹簧支吊架微机检测系统的研制

探讨了微机检测系统结构、硬、软件设计及系统实施中的关键性技术问题，设计了系统电气测量、控制和通信部分的硬件和软件，分析了系统的可靠性及采取的措施。     

Anomalous Excess Heat Capacities of Ethanol + Alkane Mixtures

A thermodynamic study at atmospheric pressure on the ethanol + n-dodecane and ethanol + n-tridecane binary systems near their liquid-liquid critical points has been carried out. To this end, densities and speeds of sound were determined in the temperature range from 288.15 to 308.15 K, whereas differential scanning calorimetry was used to obtain isobaric heat capacities per unit volume from 288.15 to 303.15 K as well as liquid-liquid equilibrium curves. All these results for the mentioned properties were obtained over the complete composition range. They were used to obtain molar volumes, isentropic compressibilities, isobaric thermal expansivities, isothermal compressibilities, isochoric heat capacities, and the excess quantities of all these properties. An untypical behavior of the excess heat capacities at the lowest measuring temperatures resulting from the critical behavior of the isobaric heat capacity is observed. No clear anomalies for the excess volumetric properties are detected.     

大兴安岭地区初霜冻成因及预报

霜冻的出现一般都是范围广、危害性强、损失大，特别是大兴安岭区地处高纬度地区，初霜来得比较早，对初霜冻的预报就显得格外重要。选取了该区近35a出现初霜的资料，经过分析研究发现，初霜冻的出现和高空环流形势及地面的天空状况有直接的关系。     

Theoretical method for estimation of mean pressure on contact area between rolling tools and workpiece in cross wedge rolling processes

The paper gives a new method no determine the mean unit contact pressures on a material—tool contact surface in cross wedge rolling processes (CWR). The dependencies worked out on the basis of the energy and the upper bound methods permits rolling forces to be determined which are comparable to experimentally measured ones. The analysis provides equations which relate the mean contact pressure q_m to the basic process parameters, namely the forming angle α, the spreading angle β, the relative reduction of a portion δ and the shear friction factors m and m_k.     

行人大腿冲击器的生物仿真度

针对汽车行人保护碰撞试验中大腿冲击器的生物力学特性问题,采用THUMS(total human model for safety)人体模型与大腿冲击器进行对比仿真分析.模拟THUMS-SUV行人交通事故,并对THUMS人体模型大腿所受冲击力和弯矩进行了输出.根据事故中行人大腿初始碰撞条件和行人大腿最低能量状态,分别建立两种工况的行人大腿冲击器碰撞模型并进行模拟,对比分析行人大腿冲击器和THUMS人体模型大腿的动态响应、最大瞬间冲击力和最大弯矩.仿真结果表明:相对THUMS人体模型而言,大腿冲击器的最大瞬间冲击力偏高而最大弯矩偏低,行人小腿和上身的运动和接触作用,会影响大腿部位的接触力和最大弯矩,因此大腿冲击器的生物仿真度有待提高.     

原料上料系统自动化控制的改造实施

某水泥厂建厂时,在原料上料系统流程上采用了传统的机旁手动操作方式。几年来,手动操作控制逐渐显露出很多弊端,于是将手动按钮启停控制更换为机旁优先的自动控制方式。详细介绍了自动控制方式的实施方案和控制原理,系统改造后,画面友好、操作简单、控制灵活,改造效果良好。