连铸机结晶器振动参数的选择

介绍了梅山连铸机结晶器振动参数，并分析了振动参数与铸坯质量及生产操作的关系和存在问题，提出了更适合梅山连铸机性能的结晶器的振动参数。     

连铸结晶器振动方式的探讨

在分析结晶器振动参数及保护渣耗量对振痕深度及结晶器润滑影响的基础上，讨论了结晶器非正弦振动方式提高拉速，防止粘结的原因及高拉速振动参数的取值范围。     

结晶器液压振动台振动状态检测与分析

结晶器振动在连铸生产中具有重要的作用,液压振动是近年来被开发并逐渐推广应用的结晶器振动方式.基于板坯连铸结晶器液压振动装置,通过检测结晶器液压振动装置的位移等参数,对振动系统的振动状态的检测与评价进行试验研究.分析了不同振动参数下两侧液压缸位移偏差、相位差随振动参数的变化规律.结果表明,结晶器液压振动装置具有较高的振动精度.为液压振动条件下结晶器振动状态的检测与评价提供了一种方法.     

连铸结晶器振动的工艺效果分析

本文分析了结晶器振动工艺参数对坯壳粘结的影响。在此基础上，讨论了结晶器振动基本参数的优化问题。     

对三钢厂结晶器振动参数的探讨

主要介绍了结晶器振动参数及工艺效果 ,振动参数与拉速匹配关系 ,对三钢厂结晶器振动参数的设定进行了探讨     

铁合金连续铸造结晶器振动参数的选择

分析了结晶器振动参数对连续铸造的影响。在此基础上，讨论了锰系铁合金连续铸造结晶器振动基本参数的选择。     

对三钢厂结晶器振动参数的探讨

主要介绍了结晶器振动参数及工艺效果,振动参数与拉速匹配关系,对三钢厂结晶器振动参数的设定进行了探讨.     

板坯连铸结晶器液压振动系统状态监测试验研究

基于板坯连铸试验平台结晶器液压振动装置,检测不同振动参数下液压缸位移等参数,分析了液压缸位移偏差、相位差随振动参数的变化规律,并讨论了非正弦振动波形的特征。结果表明,液压振动装置实现的结晶器正弦和非正弦振动,具有较高的振动精度,显示出其在结晶器振动方面具有明显的优势。     

高拉速连铸结晶器非正弦振动同步控制模型

 结晶器非正弦振动是实施高拉速连铸和提高铸坯质量的关键技术。提出了结晶器非正弦振动波形及振动工艺参数的确定方法和基本参数的选取原则，并结合高拉速连铸机的特点，分析了振动基本参数对工艺参数的影响规律，建立了拉速与振动基本参数间的同步控制关系，为改善工艺参数、最大限度地发挥非正弦振动技术优势、满足高效连铸生产要求提供了依据和指导。     

结晶器振动参数与拉坯速度的匹配关系

本文给出了实现负滑脱振动的结晶器振动参数与拉坯速度的一般关系式，分析了振动基本参数对结晶器振动工艺效果的影响，建立并讨论了振幅、频率、波形偏斜率与拉坯速度的匹配关系。     

论从实践理解世界的物质性和自然世界的先在性

马克思主义唯物论是一种物本主义形态的唯物论,还是一种超越物本主义形态、从实践理解世界的本质相关问题的实践的唯物主义的唯物论?这是一个我们必须搞清楚的有关马克思主义唯物论的本质规定性和精神实质的重大问题.在考察物本主义的唯物论及其思维方式的局限性的基础上,揭示了马克思主义唯物论是现代的、实践的唯物主义,并重点研讨了马克思主义唯物论关于从实践理解世界的物质性和自然世界的先在性的原理,以期为马克思主义唯物论进一步阐明人类世界的实践性原理奠定基础.     

Effect of cyproheptadine on the ultrastructure of the neurons of the arcuate nucleus in the hypothalamus of the rat

The data are presented on changes in the rat arcuate nuclear neuron ultrastructure after using cyproheptadine (peritol, Egyt Pharmaceutical Works, Hungary) in a water suspension at a dose of 20 mg/kg once daily during 7 successive days and twice a day within 10 days. It was shown that cyproheptadine decreases the functional activity of the arcuate nuclear neurons, depending on the total amount of the drug used. Cyproheptadine-induced inhibition of the forming neurohormone release from neurons is likely to be one of the mechanisms of its therapeutic effect in Itsenko-Cushing's disease.     

Characteristics of the sympathetic innervation of the nictitating membrane and of the vasculature of the nose and tongue of the cat

Vasomotor responses from the nasal mucosa and tongue, and contractions of the nictitating membrane, were recorded on stimulation of the cervical sympathetic or internal carotid nerves. Preganglionic sympathetic nerve fibres which elicited a membrane response possessed a lower threshold than those which evoked nasal vasoconstriction, while the latter displayed a lower threshold than fibres which evoked tongue vasoconstriction. The sympathetic vasodilator fibres to the tongue whose activity was revealed after alpha-receptor blockade, had a similar threshold to the vasoconstrictor fibres. Membrane contraction, nasal vasoconstriction and occasionally tongue vasoconstriction could be evoked by stimulating the internal carotid nerve. The postganglionic fibres innervating the nasal mucosa had a similar threshold to those of the nictitating membrane, which may indicate that there are small myelinated fibres innervating the mucosa. The preganglionic compound nerve action potential had four major components, S1-S4. S1, S2 and usually S3 fibres were associated with membrane contraction; S2, S3 and sometimes S1 fibres were associated with nasal vasoconstriction; and S3, usually S2 and occasionally S1 fibres were associated with vasoconstriction in the tongue. It is concluded that each of these three groups of nerve fibres, but not S4 fibres, may include fibres associated functionally with the three effectors. There was a considerable difference between the relative amplitude of the responses of the three effectors elicited by stimulation of the cervical sympathetic nerve at frequencies between 0.2 and 2 Hz. Vasoconstrictor responses were relatively larger than membrane contractions suggesting differences in the mechanisms of neurotransmission at the neuroeffector junctions.     

Structure of the attachment of the vocal ligament to the perichondrium of the thyroid cartilage

The ventral attachement of the ligamentum vocale of eleven larynges (new-born and adults has been studied in sagittal, frontal and horizontal sections. 1. Supplementary to the known structure of the ventral attachement of the ligamentum vocale we have noticed collagen fibers which ascend in the inner angle of the thyroid cartilage and which partly cross to the other side. Sometimes a few fibers which are running downward have been observed. This structure of the attachement must be more firm than the known structure. 2. Moreover it has been observed that a lot of the angles of the crossing collagen fibers in the cartilage of the lamina mediana (near the attachement of the ligamentum vocale) are right-angled, whereas the angles of the fibers which lie in the laminae laterales in their majority are acute-angled. This phenomenon also is interpreted as a structure which makes the lamina mediana firmer. The fact, that this structure is not so evident in the specimens of the new-born as in those of the adults indicates that there are postnatal changes in the structure of the lamina mediana.