基于神经元网络的不确定性规则的获取

讨论了不确定性规则的知识系统同神经元网络相结合的问题;提出了适合处理不确定性规则的负梯度学习算法,使不确定性规则能方便地转换成神经元网络的权矩阵;研究了如何利用神经元网络的生成能力来获取新的不确定性规则,使知识系统具有知识自动获取能力,并使原有规则系统的脆弱性得以改善.     

高精度表面粗糙度非接触式轮廓仪

提出了一种高精度表面粗糙度非接触式轮廓仪.该仪器在6JA干涉显微镜的基础上,采用相移干涉技术、外同步技术和有效算法,以消除背景光强不均匀、人眼瞄准误差、数值孔径等因素的影响,并在条纹对比度很低的情况下也能获得良好的结果.实验结果表明,测量精度比原仪器提高10倍,测量时间仅需3s,垂直分辨率和重复测量精度优于1nm.     

Kaluza-Klein理论中的费米子-广义磁单极动力学

本文讨论一种5维Kaluza-Klein理论,给出了一个依赖于y参数的推广的Gross-Perry-Sorkin磁单极解.同时还分析了以其为背景场的荷电费米子的动力学性质,结果表明Rubakov效应不会发生.     

催化法Landolt反应测钒(Ⅴ)

钒催化溴酸盐氧化碘化物成碘,加入抗坏血酸会产生Landolt反应。本实验对碘化物、溴酸盐、抗坏血酸的浓度及pH对反应影响进行了探讨。干拢离子也进行了试验。Landolt效应的诱导期倒数与钒的浓度成线性关系。实验结果满意。     

In vivo effects of epinephrine in a freshwater fish

Summary In vivo effects of epinephrine were investigated in a freshwater teleost,Barbus conchonius Hamilton. Fish given 2 mg/kg epinephrine in a single i.m. dose showed significant hypocholesterolemia and elevated, liver and kidney cholesterol levels 1–8 h postinjection. Plasma amino nitrogen evinced a transient yet significant fall at 2 h followed by a significant increase after 24 h. A marked reduction occurred in the plasma FFA and organic PO₄ levels after 1–8 h. The results offer little evidence for a lipolytic effect of epinephrine in this species, and the changes in metabolite levels are attributable, in part, to the catecholamineinduced modification of insulin secretion.N.K. thanks the U.G.C. for the award of a research fellowship.     

结型场效应管放大器的计算

本文提出一种通过绘制通用转移特性曲线和通用跨导特性曲线来计算结型场效应管放大器的 方法，由于此法能适应不同型号的场效应管，使放大电路的计算得到简化。     

中国股市多分形波动率建模及预测研究

本文考虑股市高频数据的日内效应和已实现波动率的测量误差修正了现有多分形波动率指标的构建方法，以HAR模型为基础构建新的多分形波动率预测模型.利用Diebold-Mariano检验和"模型信度设定"检验等方法综合评价了各种模型对我国沪深300股指的预测能力.结果表明：1）在相同模型范式下，赋权调整已实现波动率的样本外预测能力要优于已实现波动率，而本文提出的新的多分形波动率模型要显著优于其他模型；2）在相同波动率测度指标下，引入股价波动的跳跃成分和杠杆效应能进一步改善波动率模型的短期预测效果；3）最优和次优模型均是基于新多分形波动率方法构建的模型.     

BCI—代数的弱直和与正则可裂同态

本文引入正则可裂同态、正则可裂正合序列等概念,刻画了BCI-代数的弱直和并讨论了弱直和与外直和的关系.     

Juvenilizing effect of ecdysone mimic RH 5849 inGalleria mellonella larvae

The response of the final instar larvae ofG. mellonella to topical application of the non-steroidal ecdysone mimic, RH 5849, was age-related as well as dose-dependent. In young final instar larvae, moderate doses of RH 5849 induced perfect supernumerary larval moults, but doses equal to and higher than 8.5 μg per larva caused premature formation of larval cuticle and were lethal. Application of RH 5849 significantly increased allatotropic activity of the brain, and also activated synthesis of juvenile hormone (JH) by the corpora cardiaca/corpora allata complex. Simultaneous application of RH 5849 and FMev, a potent inhibitor of JH synthesis, to young final instar larvae lowered the incidence of perfect supernumerary larval moults. We conclude that the effect of RH 5849 on the developmental programme inG. mellonella is mediated by the corpora allata.