乌索酸的一般药理学实验研究

对乌索酸进行一般药理学研究．按药理学研究方法观察乌索酸对动物精神活动、神经系统、心血管系统、呼吸系统的影响．结果表明ig UA22,11,5．5mg/kg对猫的心率、血压、心电图及呼吸均无明显改变;ig UA240,120,60mg/kg对小鼠的精神、神经系统亦无影响．提示：乌索酸对动物无明显毒、副作用。     

微观模拟模型及其在社会经济政策分析中的应用

微观模拟模型是一种新型的政策分析工具,在西方发达国家的政策分析中取得显成绩。总结微观模拟模型的基本理论,并结合TRIM3、STINMOD、EUROMOD、SPSD／M四个主要模型介绍了微观模拟模型在国外的发展和应用情况。针对我国目前进行的各项改革,特别是医疗卫生领域改革,探讨了微观模型在我国发展和应用前景。     

ON THE SUPERMODULUS EFFECT IN COMPOSITIORALLY MODULATED STRUCTURES

The departure of electronic distribution from local electrical neutrality and the additional energy due to such a departure in compositionally modulated structures are calculated using a simplified Thomas-Fermi equation. with the energy, we have derived the variation of the biaxial modulus with the modulation period. The result agrees at least qualitatively with the exprimental finding of a supermodulus effect in such structures.     

Upconversion in Highly Doped Er3+-Yb3+ Fiber Pumped by Ti:Sapphire Laser at 800 nm

The up-conversion processes were investigated in highly doped Er3+-Yb3+ silica fiber pumped by CW or mode-locked Ti:Sapphire laser at 800 nm band. The mechanism is different from that at 980 nm pumped band. The pumping wavelength and power dependences of green, blue and red fluorescence emission were obtained. The up-conversion efficiencies of different doped concentration were investigated. The strong infrared emissions, which limit the efficiency of up-conversion were observed.     

Kosterlitz-Thouless-Type Met al-Insulator Transit ion in a Double-Plane System with a Random Magnetic Field

We study transport properties in,a coupled double-plane system with one pure and the other random, in the presence of a transverse random magnetic field. The localization.length and conductance of the system are calculated by using the finite-size scaling method combined with transfer matrix technique. We find that in the scaling transformation there is a set of fixed points in a continuous line, indicating that the system undergoes a disorder-driven Kosterlitz-Thouless-type metal-insulator transition.     

热电集成薄膜蒸馏式废水处理系统性能分析

为了给载人航天器生命保障系统的设计提供依据,对处理载人航天器废水的热电集成薄膜蒸发系统作了热分析并用数值方法进行了验证。分析中将补充废水带入的热量忽略,从而使整个分析过程得到了简化,并得出半导体制冷元件的制冷系数ε是决定系统热性能的关键参数这一重要结论,ε越大,系统热性能越好,而ε增大造成的洁净水产率降低可以由制冷元件数目增加得以弥补;ε主要决定于废水侧换热温差,因此提高废水侧换热能力是提高系统性能的关键。     

Case-based Reasoning in Conflict Negotiation in Concurrent Engineering

ＩｎｔｒｏｄｕｃｔｉｏｎＣａｓｅｂａｓｅｄｒｅａｓｏｎｉｎｇｉｓａｋｉｎｄｏｆａｎａｌｏｇｏｕｓｒｅａｓｏｎｉｎｇｉｎａｒｔｉｆｉｃｉａｌｉｎｔｅｌｉｇｅｎｃｅ［１］．Ｗｈｅｎｐｅｏｐｌｅｃｏｎｓｉｄｅｒａｎｄｒｅｓｏｌｖｅｐｒｏｂｌｅｍｓ,ｔｈｅ...     

基于自适应三分图的玉米穗丝精细化提取

玉米穗丝是玉米的受粉器官,它的生长发育状况将直接影响玉米产量。为了实现穗丝性状的自动监测与评价,提出一种基于自适应三分图的玉米穗丝精细化提取方法。首先基于直方图对比度的显著性检测算法预估目标显著性,形成显著图,再利用自适应阈值分割对显著图初步预分割;然后寻找最大连通域获得单一目标二值图像,根据穗丝特点确定形态学处理的最佳卷积核并生成包含目标、背景和不确定区域的自适应三分图,以Laplace矩阵优化closed-form matting算法中目标函数的分块矩阵;最后根据玉米穗丝特点,结合三分图结果和优化过的算法对玉米穗丝进行软分割实现精细化提取。实验结果表明：所提的研究方法像素精度值为97.96%,综合评价指标值为94.16%;其中像素精度值相较于基于点运算的OTSU算法、Grabcut算法和基于神经网络的深度学习算法SeFormer和DeeplabV3,分别提高了10.43、2.35、1.67和1.91百分点,综合评价指标值分别提高了23.96、5.59、4.28和5.13百分点。此方法能有效弥补硬分割算法对玉米穗丝这种特殊对象的分割缺陷,提取的目标区域接近真实区域,准确度高,从而为智...     

关于相互作用能的思考

讨论引力场中两物体及电势场中两电荷的相互作用能与相互作用距离的关系,并推广到光子及自由粒子的情况－利用光子的能量表达式,给出了导出光子自旋角动量的一种方法－     

X射线荧光光谱法测定钐铕钆富集物中十种稀土元素

介绍了以菲利蒲ＰＷ－１４０４型Ｘ射线荧光光谱仪、粉末稀释法测定钐铕钆富集物中１０种稀土元素的方法。该法快速、准确,能满足生产与科研的要求。