关于音乐可视化的研究——声音格式到音乐格式的转换

本文定义了适用于处理非数字乐器音乐数据的ＭＳＣ文件格式，并以Ｗｉｎｄｏｗｓ环境为例，给出了由标准音频数据格式ＷＡＶＥ到音乐格式ＭＳＣ的转换算法．从而为非数字乐器音乐在计算机系统中的编辑、转换处理提供了一种有效的方法．     

高聚物长时标力学行为的预测──（VI）PMMA试样的尺寸稳定性和寿命预测值与其实测值的对比

蠕变破坏是高分子材料在工程使用中所遇到急需解决的问题，因此，从高聚物的短时标蠕变测试预测其长时标蠕变行为的研究具有重要的实际意义，文章基于前两报导出的高聚物蠕变柔量（Ｄ）同老化时间（ｔ＿α）、推迟时间系数（β）和特征时间（ｔ＿０）之间的关系式，分析了聚甲基丙烯酸甲酯（ＰＭＭＡ）的蠕变实验数据，得到了其在不同应力水平和不同老化时间的蠕变断裂寿命（ｔ＿ｆ）和力学行为（ε＿ｆ）的预测值，与其实测值符合得很好．实验证明，该方法在较大应力范围内和较宽老化时间范围内都是确切和可行的．     

冶金工业用铸铁轧辊振动时效的应用研究

在本文中,作者通过对传统的自然时效和热时效方法的分析,从理论上探讨了振动时效方法在冶金工业用铸铁轧辊上应用的可行性,这一设想被实际生产试验证明是成功的,成果具有相当的经济社会效益。     

单基包覆火药界面粘结强度研究

该文提出了一种改善单基包覆火药界面粘结强度的方法，其工艺过程如下：（１）将单基火药吸收增塑剂进行表面预处理；（２０进行包覆，制备了用增塑剂ＮＧ和ＤＢＰ进行表面预处理的２种单基包覆火药，与直接包覆的单克包覆火药作对比，进行老化和落锤冲击试验，测试其界面粘结强度。     

Clinical aspects of the melatonin action: impact of development,aging, and puberty,involvement of melatonin in psychiatric disease and importance of neuroimmunoendocrine interactions

During the last decade we have learned much on physiological changes in the secretion of the pineal hormone melatonin (MLT) in man. Reportedly, there is little or no MLT secreted before age 3 months. Then MLT production commences, becmes circadian, and reaches highest nocturnal levels at the age of 1–3 years. During all of childhood nocturnal peak levles drop progressively by 80% until adult levels are reached. This alteration appears to be the consequence of increasing body size in face of constant MLT production during childhood. The biological significance of this MLT alteration is presently unknown. Because of conceptual considerations, major depressive syndrome (MDS) and seasonal affective disorder (SAD) have been in the focus of pineal research for several years. Although in these disorders alterations in MLT levels could not be substantiated, light therapy, a consequence of this research, was discovered as an effective treatment for SAD and perhaps for MDS. In addition, there is some recent evidence for low MLT levels in schizophrenia. Finally, the potential effect of MLT in neuroimmunoendocrine interactions is presently explored. Reportedly, in vitro studies and animal experiments give evidence for a modulatory role of MLT in the immune response. However, the exact way of this possible action of MLT remains to be clarified. Clinical studies are too scant for a meaningful estimation of MLT's involvement in human neuroimmunoendocrine interactions.     

Chronic maintenance of rat sperm reserves into old age by previous sexual contact

Summary Extensive copulatory experiences at a younger age provoked chronic changes in the reproductive physiology of old male rats. Continuous access to females was not necessary, sperm numbers were elevated in the 22-month-old males 7 months after a final sexual interaction.     

高温应用形状记忆合金时效初探(英文)

形状记忆合金的应用开发异常活跃。然而,对于环境温度超过100℃的所谓高温应用,却涉及较少。本实验研制了成分为Cu-13Al-2.81Ni(wt%)的铸造合金,其转变温度均大于100℃。淬火后的试样在180℃停放30天,相应进行电阻温度回线测室、X衍射实验及透射电镜观察。实验结果表明:合金于180℃时效,起初随着时效时间的延长,马氏体转变温度提高,而转变量基本不变;25天后,转变量急剧减少,转变温度下降。时效前后,X衍射图谱无明显变化。透射电镜观察到时效30天的样品内部出现大量的块状共格过渡相,该共格过渡相与马氏体结构一致、成分不同,阻碍马氏体的可逆转变。     

Age-dependent changes of rat liver plasma membrane composition

Summary The chemical composition of liver plasma membrane was studied in Wistar rats aged between 3 and 24 months. Results obtained indicate a significant age-dependent positive correlation of both the protein:phospholipid and cholesterol:phospholipid ratios, whereas the protein:cholesterol ratio seems to remain unaffected. Phospholipid analysis of liver plasma membrane reveals that only the phosphatidylcholine content has a significant negative correlation with age; all other phospholipid species remain basically unchanged.Supported by a grant of the Italian National Research Council, Project Preventive and Rehabilitative Medicine, Subproject Mechanisms of Aging.     

导向剂室温老化合成低硅X型沸石

利用导向剂室温(15～30℃)老化后高温晶化合成低硅X型沸石(LSX),用XRD测定样品晶型.对导向剂作用的研究表明,加入老化5h的导向剂17Na2O.6SiO2.Al2O3.250H2O可抑制LSX样品中的羟基方钠石(HS)杂晶,但没有加快LSX反应体系的晶化速度.对原料配比和反应条件的研究表明,产物对H2O/(Na2O K2O)摩尔比和Na2O/(Na2O K2O)摩尔比非常敏感,稍有变化就会引起杂晶的生成;随着室温老化和晶化温度的升高以及时间的延长,样品LSX结晶度增大.室温(25～30℃)老化12h、110℃晶化3h合成的LSX结晶度好、纯度高,Si/Al摩尔比为1.02±0.03.     

固溶时效对Cu-17Zn-0.4Cr合金硬度的影响

文章通过不同的热处理工艺来研究固溶时效对Cu-Zn-Cr合金硬度的影响.结果表明,经920 ℃、1 h固溶,再经475 ℃、1 h时效,合金的硬度能达到最大值120.5 HV.X射线衍射和扫描电镜研究表明,经920 ℃固溶475 ℃时效后,Zn在合金中与铜形成单相的α固溶体基体;有少量Cr在固溶过程中未溶入基体,此Cr粒子尺寸粗大;大多数Cr粒子为时效过程析出,在基体上呈细小弥散分布,这部分析出的Cr粒子是合金强化的主要原因.