1,5-二氨基四唑及其系列化合物研究进展

介绍了1, 5-二氨基四唑(DAT)的制备方法,重点讨论分析了以二氨基胍盐酸盐为原料制备DAT的优化工艺条件.DAT易与强酸反应形成胺盐、易与高氯酸金属盐形成六个DAT分子直接参与配位的含能配合物,这些化合物具有一定的机械感度和良好的爆炸性能,在含能材料领域具有潜在的应用前景.     

5-羟色胺与多巴胺系统相互作用的研究

２β－甲酯基－３β－（４－碘苯基）托烷（β－ＣＩＴ）与多巴胺转运蛋白（ＤＡＴ）、５－羟色胺转运蛋白（５－ＨＴＴ）亲和力几乎相等，因此可用５－ＨＴ重摄取抑制氯米帕明来研究５－ＨＴ系统与ＤＡ系统间的相互作用。用过氧乙酸氧化碘标记法制备＾１２５Ｉ－ＣＩＴ。用不同剂量盐酸氯米帕明（０．２５、０．５、１、１．５、２、２．５ｍｇ）研究对＾１２５Ｉ－β－ＣＩＴ脑内结合的影响，及同一剂量盐酸氯米帕明（１ｍｇ／０．     

3,5-二氨基-1,2,4-三唑的合成与表征

以80%水合肼与37%浓盐酸为起始原料得到二盐酸肼,然后在水中与二氰二胺缩合环化合成了标题化合物,收率89%,精制后纯度达到99%以上,m.p.208~210℃。合成的最佳反应条件为:温度48~50℃,反应时间2 h,二氰二胺与二盐酸肼最佳料比为1∶1.1,pH控制在10.4~10.8。并利用元素分析、红外光谱、核磁共振光谱、质谱等分析手段对其结构进行了表征。     

全站仪和GPS数据格式的转化方法

全站仪和GPS下载的数据,其中大部分都是非DAT数据,而利用全站仪和GPS在野外所采集的数据进行计算机数字制图或测量控制网观测数据的处理时,需要DAT数据文件。在这种情况下,将所下载的非DAT数据文件转换成DAT数据文件,就显得较为重要。针对下载的非DAT格式的数据,利用WORD,EXCEL,CAD等大众化普及软件的某些功能,生成计算机数字制图或测量控制时可以被识别的DAT格式数据文件。该方法操作简单,易于掌握,避免用户开发或编写更复杂的软件和程序。从而达到事半功倍的效果。     

全数字测量系统DAT/EM在数据采集中的应用

简要介绍了DAT/EM系统的主要部件和功能,结合HK09-0042-ST Lucia项目对DAT/EM系统内业作业的步骤流程进行了分析和归纳,并对DAT/EM系统与其他系统对比研究,由此总结了DAT/EM系统的性能优点。     

面向对象技术中标识对象的策略

面向对象（OO）分析模型的核心是对象，如何找出这些对象是OO技术所面临的中心挑战。对标识对象策略的探讨，有助于对OO技术的深入理解和掌握。本文结合需求文档分析工具的对象标识，对相关的问题进行了讨论。     

采用液滴分析技术定量检测水中溶解氧的研究

在原有光纤-电容传感器的基础上,引入了光纤溶解氧(DO)传感器,在保持液滴分析仪原有结构的情况下,可同时获得水质的定性和定量信息。基于液滴分析技术(DAT)对水中30种不同浓度的DO含量进行了检测。实验结果表明,基于DTA,采用光纤DO传感器检测液体的DO含量是有效的。在考虑温度影响时,二次多项式拟合模型效果最佳,系统的灵敏度可达0.1mg/L,最大相对误差为2.38%。     

水下航行载体实航振动和噪声测量装置的研究

介绍了一种新型的水下航行载体实航振动和噪声测量装置,它包含一个多通道、连续高速采样、大存储容量的ＤＡＴ数字磁带记录仪。这套装置体积小,安装在水下航行载体内部,用可充电电池供电,自成独立系统。它不仅能测量实航全过程的振动和噪声,还能记录其他瞬态或稳态参数,具有很大的通用性。     

Visual search performance in children rated as good or poor attenders: The differential impact of DAT1 genotype, IQ, and chronological age.

Attention-deficit/hyperactivity disorder (ADHD) is characterized by poor attention to detail, poor attention maintenance, and variability throughout task performance. The authors used a quantitative trait loci approach to assess the association between the dopamine transporter (DAT1) high-risk genotype, cognitive performance (visual search and vigilance), and ADHD symptoms in a community sample of boys 6-11 years of age. The potential confounding effects of IQ and chronological age were also investigated. Results demonstrate that accuracy in target detection, not speed, distinguishes poor attenders from good attenders. The authors speculate that the measure of performance (e.g., time and false alarms) may be critical in detecting attentional weaknesses. In contrast, DAT1 gene, known to be associated with the behavioral symptoms of ADHD, was unrelated to visual search or vigilance performance, although it was related to ADHD symptoms. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Real‐time tuning of PI controllers in HVAC systems

The problem of tuning single‐loop controllers in heating, ventilating and air conditioning (HVAC) systems is explored. The HVAC process was described by a first‐order‐plus‐dead‐time (FOPDT) model. By using recursive least squares method, the model parameters were updated while the system remained in closed‐loop. The H_∞ loop‐shaping tuning rules published in the literature were transformed to discrete‐time tuning rules and were implemented in an adaptive PI control strategy. The methodology was applied to a discharge air temperature (DAT) control system. The output responses of adaptive PI controller were compared with a LQR optimal adaptive controller. Simulation results show that the adaptively tuned PI controller is able to track setpoint changes very well in the presence of changes in plant parameters, disturbances and external noise acting on the system. Copyright © 2004 John Wiley & Sons, Ltd.