湘钢2~＃高炉PW炉顶料面数学模型应用研究

作者研究出ＰＷ炉顶布料料面数模及其应用范围。与湘钢２＃高炉实测料面值比较，用本数模计算出的料面边缘角和中心角与实测值基本一致。表明它具有较高的应用价值。     

大型局域网管理的探讨

计算机网络的发展过程 ,给网络管理提供了广阔的舞台 ,本文结合实际情况 ,试图通过一些事例 ,分析局域网应用技术和原理 ,比较其技术特点及优势 ,希望在网络管理方面能够做些有益的探索     

Colloidal carbon as a multilevel marker for experimental lesions

Summary The use of colloidal carbon for the anatomical marking of experimental lesions is proposed. Visualization of the lesion site may be readily performed through this procedure at the macroscopic, light microscopic, and ultrastructural levels in the same specimen. The chemical inertness of the marker and its relative permanency greatly add to its usefulness.     

微机监控在集中供热节能方面的应用

介绍了微机监控在集中供热节能方面的应用，提出了供热节能的主要方案，从网络总布局、主控中心的配置及功能、供热站的配置及功能、通讯等方面论述了节能方案的实现。     

多j组态对排列内禀态

本文采用多j组态对排列模型,考虑包含对力,四极对力,以及四极形变场的系统哈密顿量,通过变分计算,定出了多j组态对排列内禀态,并计算了这些态中的四极矩。最后研究了对力参数给内禀态的影响。结果表明,在对排列内禀态中,耦合成总角动量为0,2,4的核子对占主要成分,表明了在研究变形核时,引进s,d,g玻色子是必要的。     

Airborne pollen content in the atmosphere of central Italy (1982–1986)

Summary This report describes qualitatively and quantitatively the content of pollen in the atmosphere of central Italy during the five years 1982–1986. Total production in this period showed fluctuations depending on the flowering seasons of the anemophilous taxa. The season of maximum pollen concentration was from April to July, with a prevalence of arboreal pollen in thefirst months, and of pollen from herbaceous plants in the last months of the year. During the five years of research more than 81 different types of pollen grains were recorded and identified. In both the cities investigated Curpessaceae/Taxaceae, Fagaceae, Oleaceae Gramineae and Urticaceae were responsible for the greatest amounts of pollen.     

响应面法优化大比例厂拌热再生混合料参数

为对大比例厂拌热再生沥青混合料的工艺参数进行优化设计,选取再生料(reclaimed asphalt pavement, RAP)掺量,再生料预热温度,以及再生剂掺量为试验变量,选取动稳定度,低温小梁弯曲最大弯拉应变,以及冻融劈裂强度比为响应变量。使用Design-Expert软件中的Box-Behnken响应面优化设计方法,进行三因素三水平优化设计。其中,动稳定度,最大弯拉应变和冻融劈裂强度比分别作为混合料高温稳定性,低温抗裂性和水稳定性的衡量指标。再生料掺量选取20%～40%,再生料预热温度选取100～140℃,再生剂掺量选取6%～10%,响应变量均以最大值为优进行优化设计。结果表明：再生料掺量对于3个响应变量都有显著影响,而再生料预热温度和再生剂掺量对动稳定度和低温小梁弯曲最大弯拉应变有较大影响,对冻融劈裂强度比影响较小。优化得到最优解的再生料掺量为25.69%,再生料预热温度为131.59℃,再生剂掺量为8.29%。此时动稳定度为3 224.35次/mm,最大弯拉应变为2 870.37με,冻融劈裂强度比为89.230 1%。且使用优化后的工艺参数进行试验,得到的结果与预测结果...     

奇阶中心对称幻方的de la Loubere 构造方法的证明

幻方的奇妙的构造方法上有高智能的特点，揭示其规律并上升到理论的高度不仅有着数学上的价值，而且对深入探讨客观世界丰富的对称结构及其变化规律有着积极的意义，奇阶中心对称幻方的ｄｅ ｌａ Ｌｏｕｂｅｒｄ构造方法是在１７世纪发现的，并被中外组合数学方面的书籍广为引用，但至今未看到此方法严格的数学证明，运用组合数学的方法，完成了这件工作，它属于幻方理论化工作之一，幻方理论化工作的价值在于赋予构造幻方操作的数     

Lack of tolerance development to tumor necrosis factor α inside the central nervous system

Tumor necrosis factor (TNF) was repeatedly microinfused into the lateral ventricle of guinea pig brains at a dose of 200 ng, 4 times within 150 min, at intervals of 3 days. In comparison to guinea pigs infused with solvent according to the same time schedule, the animals responded to TNF with pronounced fevers. The quantity of the fever response was the same after each of the 4 microinfusions of TNF. Three days after the last infusion of TNF or solvent all animals received an intramuscular injection of bacterial lipopolysaccharide (LPS). The fever in response to LPS was the same in both groups. Thus, the reported development of tolerance to repeated systemic administration of TNF^1–3 does not develop inside the blood-brain barrier. Also, the febrile response to LPS is not influenced by repeated central pre-treatment with TNF, whereas repeated peripheral treatment does have an effect.