工程师的现场管理—指令的使用

现场指令，作为解决工程施工过程中遇到的问题，而采取的一种处理形式现场指令的发布既要及时，又要慎重：既要有利于施工的方便快捷，又要尽量减少因此而引起的合同纠纷     

切向燃烧锅炉炉膛结构对烟道烟气偏差的影响

对引进型６００ＭＷ机组四角切向燃烧锅炉进行冷态模化试验，系统地研究了上部炉膛折焰角结构和炉膛高度对水平烟道内气流速度不均匀性的影响．通过对原炉膛结构进行改进，提出了新的折焰角结构和炉膛高度，明显减小了水平烟道内气流速度场的不均匀性，为解决大容量四角切向燃烧锅炉水平烟道烟气偏差提供了有价值的试验数据，并为锅炉设计和改造提供了参考依据．     

应用模糊综合评判法对液固两相流泵磨损程度的研究

针对目前评价液固两相流泵磨损程度的方法在定量分析方面存在的不足，应用二级综合评判法建立了包手运行、介质，结构各环节及其各环节对泵磨损类型的因素体系，确立了泵磨损的模糊分类等级对应分值，构造了磨损模糊关系矩阵。     

一般非降路径数问题的模拟算法

讨论了一般非降路径与不定方程的内在联系，把求非降路径数的问题转换成求不定方程的解的个数问题，并用此方法解决了一般非降路径数的求解问题     

甲醇中用氨和环氧丙烷合成异丙醇胺

研究了在甲醇介质中用氨和环氧丙烷制备异丙醇胺的新工艺.考察了原料配比、反应温度、体系中的水含量对反应的影响.     

A family of mammalian Na+-dependent L-ascorbic acid transporters.

Vitamin C (L-ascorbic acid) is essential for many enzymatic reactions, in which it serves to maintain prosthetic metal ions in their reduced forms (for example, Fe2+, Cu+), and for scavenging free radicals in order to protect tissues from oxidative damage. The facilitative sugar transporters of the GLUT type can transport the oxidized form of the vitamin, dehydroascorbic acid, but these transporters are unlikely to allow significant physiological amounts of vitamin C to be taken up in the presence of normal glucose concentrations, because the vitamin is present in plasma essentially only in its reduced form. Here we describe the isolation of two L-ascorbic acid transporters, SVCT1 and SVCT2, from rat complementary DNA libraries, as the first step in investigating the importance of L-ascorbic acid transport in regulating the supply and metabolism of vitamin C. We find that SVCT1 and SVCT2 each mediate concentrative, high-affinity L-ascorbic acid transport that is stereospecific and is driven by the Na+ electrochemical gradient. Despite their close sequence homology and similar functions, the two isoforms of the transporter are discretely distributed: SVCT1 is mainly confined to epithelial systems (intestine, kidney, liver), whereas SVCT2 serves a host of metabolically active cells and specialized tissues in the brain, eye and other organs.     

一氧化氮与心肌再灌注损伤

一氧化氮（NO）是一种生物信息递质，广泛存在于各种细胞和组织中，具有减少血小板聚集、抑制、嗜中性粒细胞聚集等功能。NF－KB被认为是近十年最有研究潜力的调节免疫反应、应激反应、凋亡和炎症的核转录因子。充分认识一氧化氮、NF－KB与心肌再灌注损伤的机制。为对其进一步研究提供理论依据。     

Chinese Word Boundary Ambiguity and Unknown Word Resolution Using Unsupervised Methods

An unsupervised framework to partially resolve the four issues, namely ambiguity, unknown word, knowledge acquisition and efficient algorithm, in developing a robust Chinese segmentation system is described.It first proposes a statistical segmentation model integrating the simplified character juncture model (SCJM) with word formation power.The advantage of this model is that it can employ the affinity of characters inside or outside a word and word formation power simultaneously to process disambiguation and all the parameters can be estimated in an unsupervised way.After investigating the differences between real and theoretical size of segmentation space, we apply A* algorithm to perform segmentation without exhaustively searching all the potential segmentations.Finally, an unsupervised version of Chinese word-formation patterns to detect unknown words is presented.Experiments show that the proposed methods are efficient.     

Synthesis and characterization of bifunctional terbium complex-based nanoparticles

Novel bifunctional terbium complex-based nanoparticles were developed using a modified Stber method and a layer-by-layer assembly process. A magnetic core of Fe3O4 nanoparticles was coated with a silica shell to form the first layer. Then a ternary Tb3+ complex (TESPPA-Tb), which acted as a luminescent marker, was covalently bound to the silica surface by stable Si-O-Si bonds. The TESPPA monomer was synthesized by binding pyridine 2,6-dicarboxylic acid to 3-aminopropyltriethoxysilane, which was used as a ligand for coordination with the Tb3+ ions. An outer shell of silica was applied to the nanoparticles to allow for versatility with surface functionalization. The nanoparticles were characterized by X-ray powder diffraction, transmission electron microscopy, Fourier transform infrared spectroscopy, ultravioletvisible spectroscopy, vibration sample magnetometer, and photoluminescence spectroscopy. The bifunctional nanoparticles exhibited favorable superparamagnetic behavior and photoluminescence properties of Tb3+. These nanoparticles have potential applications in biolabeling, bioseparation, immunoassays, and pathogenic diagnosis.     

地铁与轻轨课程教学改革体会

针对地铁与轻轨课程教学存在的问题,给出了教材、课程体系、设计训练和现场实践的具体改革思路和方法。突出创新了课程考核方式转为课程创新内容、课程设计、课程实践和期末考试等综合性考察;教学方法转为要充分利用网络资源的多媒体教学,充分利用电子邮件扩大与学生的交流以及创新论文的写作答辩。