14例肺炎型肺癌X线征象与病理对照

目的 :加深对肺炎型肺癌 X线征象的认识 ,提供其病理理论依据。方法 :对照分析 14例肺炎型肺癌的 X线征象与病理特征。结果 :肺炎型肺癌 X线征象与癌组织生长方式有关。结论 :提高对肺炎型肺癌X线征象的认识及加强相应的检查有助于该病的早期诊断。     

区域物流需求分析模型及其算法

物流需求量是区域物流中心功能设计和规模确定的依据，本文参考了宏观经济预测和交通需求预测的有关方法，构造了多区间投入产出模型和空间价格均衡模型相结合的区域物流需求分析模型，利用多区间投入产出模型能较好地分析地区间和部门间的经济关联，利用空间价格均衡模型能将物流产生作为内生变量处理，人而使区域物流需求分析模型成为包含宏观经济分析层和物流分析层的两层次决策问题，分析过程能同时把握社会经济条件和物流供应条件两方面因素，最后根据模型的特点，给出其求解算法。     

Analysis of the characteristic sequence of intein and revision of its motifs

Since the first intein (Sce VMA) was found inSaccharomydes cerevisiae ATPases gene in 1990, more and more inteins were identified. It is necessary to analyze the new inteins to understand the sequence charateristics of inteins. By searching protein and nucleic acid database systematically, 101 inteins were found, of which 69 inteins contain homing endonuclease motifs. We only analyze the 69 inteins since most inteins are the classic inteins with homing endonuclease motifs. We found that the distribution of these inteins is particular among species and protein. By multiple sequence alignment, some new sequence characteristics were found and the motifs described previously were revised.     

镱（Ⅲ）与2—（5—溴—2—吡啶偶氮）—5—二乙氨基酚显色反应的分光光度法研究

研究了在表面活性剂CTMAB存在下镱（Ⅲ）与5－Br－PADAP的显色反应．结果表明，在pH=9．66的NH4Cl－NH3·H2O缓冲溶液中，镱（Ⅲ）与5－Br－PADAP进行最佳络合．最大吸收波长λmax=580nm．表观摩尔系数为1．5×105L·mol-1·cm－1，镱（Ⅲ）星在0－12μg／25ml范围内符号比尔定律．     

师专普通物理实验教学中不确定度的讨论

论述了不确定度在普通物理实验教学中的可行性及计算。     

纯滞后系统的Smith-Fuzzy预估控制

介绍了Ｓｍｉｔｈ预估器存在的问题，采用模糊控制与Ｓｍｉｔｈ预估器相结合的控制策略．仿真结果表明，Ｓｍｉｔｈ－Ｆｕｚｙ预估控制器具有较好的控制效果和鲁棒性     

高温超导体Dy_(1-x)Pr_xB_(a2)Cu_3O_(7-δ)的磁弛豫研究

本文通过磁驰豫实验研究发现，Pr的掺杂对提高高温超导体的磁通钉扎能力有明显的作用．     

求一阶微分方程积分因子的两种方法

介绍了两种求积分因子的方法——公式法和待定指数法，使得求积分因子时有一定的规律可循     

Synthesis of 2,4-dibromo-5-fluorobenzonitrile

2,4-Dibromo-5-fluorobenzonitrile has been synthesized for the first time (81.5% yield). It may be used in synthesizing 2,4-dibromo-5-fluorobenzoic acid, the intermediates of fluoroquinolones. The ammoxidation procedure for preparation of the nitrile has been described in detail. Zheng Qiong: born in 1945, Associate professor     

理想稠密分布的诣零环

本文主要证明了特征为零的诣零DI-环是幂零的,其幂零指数≤5。