A continuous 200-ka palaeoclimatic record from stalagmite in Tangshan Cave, Nanjing

An oxygen isotope temperature record from 381 to 166 kaB. P. (²³⁰Th/²³⁴U dating and tuned ages) has been obtained by combining data on the isotopic composition of calcites with that of fluid inclusions trapped in a stalagmite from a limestone cave in which a fossil cranium deposited. Several laminae in microsequence of the stalagmite represent climatic events or shifts. The Nanjing man fossil was older than 381 kaB. P.     

An all solid-state electrochromic smart window

An all solid-state electrochromic smart window employing prussian blue and electrodeposited WO₃ film with poly (vinyl chloride) (PVC) gel electrolyte that has high conductivity (2 mS/cm) at room temperature has been fabricated for the first time. The smart window has beell found to be excellent for electrochromism and memory characteristics.     

Preliminary study on climatic signals of stable isotopes from Holocene speleothems under monsoon condition

Within the East Asian monsoon zone the change in oxygen isotope of Holocene stalagmite is mainly related to monsoon rain rather than to temperature. And carbon isotope can be taken as a comprehensive signal which contains the natural information and the information of anthropogenic activity. Isotopic analysis is also compared with the annual layer records.     

时变不确定非线性系统的鲁棒输出跟踪

该文研究了一为具有时变参数或扰动的非线性系统的鲁棒轨迹跟踪控制问题,假定系统的标称模型是可以反馈线性化的,通过递推构造壮环系统地的Ｌｙａｐｕｎｏｖ函数,给出了该类不确定系统鲁棒输出跟踪控制器设计方案。该控制器能保证闭环系统的状态是一致有界的,且通过对控制器参数的适当选择,可使闭环系统的输出跟踪达到指定的精度要求,最后由一机器人控制系统的仿真研究表明,该文提出了控制方案具有很强的鲁棒性,控制效果是令     

TS分子筛的催化氧化性能研究：Ⅲ.苯酚氧化制苯二酚

研究了自合成的钛硅分子筛（ＴＳ－１）对Ｈ２Ｏ２氧化苯酚制苯二酚反应的催化活性。对反应的温度、时间、催化剂用量、酚：Ｈ２Ｏ２等因素进行了考察：在催化剂用量为苯酚的１０％、酚：Ｈ２Ｏ２（ｍｏｌ）为３：１时,经５７℃／６ｈ反应,Ｈ２Ｏ２的转化率和对产物苯二酚的利用率可达９０％和８０％,还观察到,分子筛的晶粒大小对苯酚的氧化活性影响较大,大晶粒催化剂的内表面利用率较低,从而影响催化活性。     

两端任意支承的矩形截面钢筋混凝土梁可靠性优化设计

利用雷－莉法把非正态变量转换为当量正态变量,建立了在多个任意分布基本变量情况下的２性结构优化的设计数学模型。最后给出了设计人格最小的矩形截面钢筋混凝土梁的可靠性优化设计实例。     

基于神经网络的无监督自学习控制系统

所论系统的控制由两个神经网络完成,即对象放识器和系统控制器。并且提出了一种 新的学习算法,它能利用存贮于辨识网络的信息改进控制策略。该控制系统可以对非线性系统,不确定系统等进行无监督的学习控制。     

篮球比赛中三分远投运用的探讨

通过现场观察、统计和数据的归纳整理,对远投命中率、个人和战术三分球、远投区域、远投时间和远投队员等进行讨论和分析．篮球比赛中,必须加强终场前的远投战术配合训练,提高战术远投,加强弧顶和两侧底角区域的远投,提高组织后卫和中锋的远投能力,提高远投队员的心理训练水平和对抗能力．