湖北荆州地区建设煤制尿素项目的可行性分析

从产品市场需求、价格水平、原料供应、产品生产成本竞争力等方面分析了在湖北荆州地区建设煤制尿素项目的可行性.     

新型铜基块体非晶合金Cu55-xZr37Ti8Inx的制备及性能

利用铜模吸铸法合成Cu—ZrTi—In非晶棒。块体非晶合金Cu50Zr37Ti8In5的△瓦值最大,为66K。从原子尺寸大小和热力学角度分析在铜基非晶合金中添加适量In元素后能够提高其非晶形成能力的原因。在所测的块体非晶合金Cu55．Zr37Ti8Inx（x≤〈5）,Cu52Zr37Ti8In3表现出最高的抗压强度（1981MPa）和最佳的塑性,其在压缩断裂前的总塑性变形量约为1．2％。     

NGC-CIMS信息分类编码系统的设计和实现

信息分类编码系统是CIMS各有关环节集成的纽带。本文针对NGC－CIMS对信息分类编码系统的需求，提出了一种面向CIMS各环节、分级、分段和柔性的信息分类编码系统的结构模型，在开发初期提出了基于OO的编码模型；在系统实现时，采用了码位依赖关系和基于元数据及码位模式分解的解决方法；在译码系统实现时，提出了基于总控元关系的译码方法；在基于编码的检索上，提出了不完全码的思想。目前该系统已成功得到了厂方应用。     

一种基于可扩展对象的程序设计方法

在对可视化程序设计实现机制研究的基础上，结合面向对象程序设计提出了一种可扩展对象程序设计方法。以窗体对象研究为出发点，叙述了采用复杂对象模块以及存储管理器实现子复杂对象生成的方法，对大型系统的开发具有一定的现实指导意义。     

Comparison of wound culture and bronchial lavage in the severely burned child: implications for antimicrobial therapy

BACKGROUND: The relationship of the burn wound flora to microbial pathogens in the tracheobronchial tree has important implications for antimicrobial therapy in the severely burned patient. Management of septic complications is bolstered by surveillance quantitative wound cultures (QWC) and bronchial lavage fluid (BLF) cultures. OBJECTIVES: To compare the organisms present in BLF with those found in QWC and to determine if QWC can predict BLF results. DESIGN: Results of BLF cultures from all patients who underwent bronchial lavage from January 1, 1996, to December 31, 1996, at our institution were compared with QWC data from the same date. Criteria for a positive match included an identical antibiotic susceptibility pattern and biotype. Match rates were calculated qualitatively and quantitatively. RESULTS: In 30 (48%) of the 62 BLF cultures, there was a match between the organism identified in the BLF and the QWC. When strict quantitative criteria were applied, the match rate was only 9 (14%) of 62. Burn size and inhalation injury had no significant effect on match rate. CONCLUSIONS: Whereas the microbial pathogens were similar in the QWC and BLF, linear regression showed no value of QWC in predicting BLF culture results. The difference between qualitative and quantitative match rates suggests cross-colonization between the burn wound and tracheobronchial tree, but little to no cross-infection. The QWC and BLF cultures must be performed independently in determining antimicrobial specificity in the burned patient.     

Kinetics and mechanisms of chemical reactions in nonequilibrium-plasma etching of silicon and silicon compounds

Plasma-chemical etching of silicon and silicon compounds is reviewed. It is shown that present data indicates that fluorine atoms and molecules are the main particles responsible for etching of silicon and that atomic fluorine is the main active particle for etching of silicon dioxide. Insufficient data exists to establish the contribution of charged and excited states to the etching of silicon and its compounds but oxygen atoms and molecules are seen to have a strong influence and fluorocarbon radicals can passivate the surface by forming polymer films.     

Ni纳米管的电化学模板法制备及表征

本文采用一种简单而有效的电化学方法在硫酸铵体系中利用氧化铝模板(AAO)成功制备出规则有序的Ni的管状纳米阵列.使用这种方法可获得外径约为70nm,内径约为50nm的Ni纳米管.对所得的Ni纳米管进行了扫描电镜(SEM)、透射电镜(TEM)、选区电子衍射图(SAED)和X射线衍射(XRD)分析,结果表明:该方法制备的Ni纳米管高度有序,大小均一,其形貌受控于氧化铝模板的结构,外径与模板的孔径相等.     

湘西苗族头面部的体质形态测量分析

为探讨湘西苗族头面部的体质特征，对湘西苗族头面部42项指标进行活体测量，得到了头面部42项体质指标的平均测量值和相关指数，并对各体质指数进行了分型。通过与国内其他10个民族头面部的体质特征进行比较，表明湘西苗族头面部体质有其独特的民族特征。