BRW—1H高精度比色红外光纤温度计的研制

本文从比色测温原理出发，介绍了用对数－反对数放大器实现除法运算的温度计结构原理，以及各主要环节特性。     

比色温度计的波长选择

为抵消辐射串变化的影响，比色温度计的两波长应相距较近并处于辐射率恒定或变化平缓的波段。选择较短波长可提高辐射亮度的饱和温度，以扩大比色测温范围。测量通路介质吸收辐射能量，波长应选在其透过率较高的波段。     

新型光纤比色温度传感器的研究

介绍了光纤比色温度测试仪的原理、特性及其温度测量方法.设计组装了光纤比色温度传感器,实验表明其具有响应快、频带宽、非接触、抗电磁干扰、工作温区大、安装操作方便等特点,可应用于钢液温度连续测量.     

TF-4000型光纤两色温度计及其应用

该仪器由检测器、变送器、指示仪表三部分组成。检测器采用了独特的光学系统和保护措施。测量误差为测定值的0.5％。除在连铸机上应用外还可用于加热炉内钢坯和焊管机焊缝等的温度检测等。     

牙科比色中应用三种比色板的临床效果对比研究

目的:对研究Vita经典比色板、Vita 3D-Master 比色板和SHOFU NCC 比色板在牙科比色中的临床效果,以指导临床和技工制作瓷修复体.方法:采用修复前比色、修复体制作完成后空腔外比色以及口腔内核对颜色的方法,对比三种比色板效果.结果:修复体制作完成后,在空腔内、外核对颜色时,使用Vita 3D-Master 比色板和SHOFU NCC 比色板的满意度均高于Vita经典比色板,而Vita 3D比色板和NCC比色板之间无显著性差异.结论:Vita 3D-Master 比色板和SHOFU NCC比色板颜色范围较宽,临床比色可以取得较好的效果.     

利用红外温度计实现回转窑温度在线检测的新方法

通过分析传统的回转窑温度测量方法,提出了一种新的在线测量方法。利用红外温度计测量回转窑内部温度,并与传统的测量方法对比,用实验及数据验证该方法的可行性,解决了用热电偶测量回转窑温度信号难取出的问题。测量结果准确、稳定,满足生产的要求。     

苯、甲苯酸洗比色高的原因分析及改进措施

针对精苯车间实际生产中出现的产品比色偏高问题,进行了详细的分析,找出了影响因素,并制定出相应的改进措施.     

红外辐射温度计的误差分析与测量不确定度评定

通过对红外辐射温度计在检定过程中的误差来源分析，阐明了对红外辐射温度计检定及对测量不确定度评定的意义。     

硝化苯硝化甲苯酸洗比色高的原因及改进措施

本文分析比色高的原因,是轻苯带水和干点高,初馏操作等影响,并提出了改进措施。     

YB/T 2305—2007《焦化产品试验用玻璃温度计》标准述评

简单介绍了YB/T 2305—2007《焦化产品试验用玻璃温度计》标准的简要情况及现行焦化产品试验方法标准使用温度计的情况,重点介绍了标准修订的主要技术内容,对企业的使用和执行标准具有一定指导作用。     

Land红外测温仪在移动带钢温度测量中的应用

主要介绍英国Ｌａｎｄ仪器仪表公司红外测温仪的特点，选用要点及在攀枝花钢铁公司冷轧厂连续镀锌线（ＣＧＬ）退火炉带钢温度测量与控制中的应用。     

Generalized oscillator-strength calculations for some low-lying excited states of H2 using a high-accuracy configuration-interaction wave function

Replacement of Met31 by (N-Me)Nle in CCK8 or CCK4 has been shown to improve the affinity and selectivity for CCK-B receptors. In order to obtain molecules with enhanced bioavailability, two novel series of protected tetrapeptides of the general formula Boc-Trp30-X-Asp-Y33 have been developed. Introduction of (N-Me)Nle and the bulky, aromatic naphthylalaninamide (Nal-NH2) in positions X and Y, respectively, does not greatly modify the affinity for guinea pig brain CCK-B receptors. In contrast, incorporation of hindering N-methyl amino acids such as (N-Me)Phe, (N-Me)Phg, or (N-Me)Chg, but not their non-methylated counterparts, in position X induced a large decrease in affinity for the CCK-B binding sites. Among the various peptides synthesized, Boc-[(N-Me)Nle31,1Nal-NH2(33)]CCK4 (2) (KI = 2.8 nM), Boc-[Phg31,1Nal-NH2(33)]CCK4 (15) (KI = 14 nM), and Boc-[Phg31,1Nal-N(CH3)2(33)]CCK4 (17) (KI = 39 nM) displayed good affinities for brain CCK-B receptors and had good selectivity ratios. These pseudopeptides, in which the presence of unnatural and hydrophobic residues is expected to improve their penetration of the central nervous system, were shown to be very resistant to brain peptidases. Interestingly, whereas compounds 2 and 15 proved to be full agonists for rat hippocampal CCK-B receptors when measured in an electrophysiological assay, compound 17 behaved as a potent antagonist in the same test and displayed a good affinity in rat brain KI(CCK-B) = 51 nM as compared to the Merck antagonist L365,260,KI(CCK-B) = 12 nM. This illustrates a simple means to obtain CCK-B antagonists and suggests that the free, CONH2 group plays a critical role in the recognition of the agonist state of brain CCK-B receptors.     

三位半数字毫伏表功能的扩展

本文用两个实例阐明了单片3$\\frac{1}{2}$位A/D转换器大可发掘利用。(1)袖珍热电偶数字温度表,配K型热电偶,范围-50~1300℃,精度0.5级,比200mV表头只增加8个电阻。(2)制成数字显示仪只增加3个电阻,不但能直接显示被测值(而不是百分数)而且还能通用。     

Unreliability of the infrared tympanic thermometer in clinical practice: a comparative study with oral mercury and oral electronic thermometers

BACKGROUND: This study was designed to determine the magnitude and frequency of measurement errors with infrared tympanic thermometers in the clinical setting. METHODS: In a convenience sample of 137 adult inpatients, we compared body temperatures measured by a Diatek 9000 Infrared Aural Thermometer and an IVAC 2090 CoreCheck Tympanic Thermometer between themselves, in right versus left ears, and against concurrently measured oral temperatures using both an electronic thermoprobe and conventional glass mercury thermometer. RESULTS: There was a significant between-brand difference of 0.6 degrees C (IVAC 相似文献