乳化油凝点测定方法的探讨

通过乳化油凝点的检测,发现乳化油在凝固过程中温度出现拐点和平衡现象。分析乳化油温-相变化的特点,指出乳化油相变过程中的拐点温度就是乳化油的凝点,并提出反映乳化油特点的凝点检测方法。实际应用表明,该检测方法快速准确。     

采用半导体传感器的多点温度仪的研制

介绍了由AT89C51构成的多点温度仪的设计过程.此多点温度仪利用半导体电压型温度传感器实现多点温度的采集,并完成实时温度显示、时间显示及定时打印.     

家庭中的安全

室内防高温危害 当人的皮肤温度低于32摄氏度，空气温度高于32摄氏度时，人体就要吸收热量达到平衡。如果气温再高，人体热量来否及散出，就有可能使血液温度升高，造成中暑。防止高温除利用空调外，也可采用以下方法：在早上9点到下午6点关闭门窗；若天气干热可在地面上洒些凉水，让水分蒸发吸热。     

工业用温度参数的精密测量

详细介绍了用ＡＤ５９０、５ＧＯＰ０７、ＣＢ７１０７等芯片组成的多点温度检测系统的硬件配置和设计原理。     

选择淬火加热温度的原则

选择淬火加热温度的依据是钢的相变点,但还应考虑到钢件的成分、原始组织、加热设备、钢件的大小及形状、对钢件的性能要求及淬火介质等因素。总之,既要保证钢件的热处理质量,又要提高生产效率,进行综合考虑。 1.钢的相变点 钢件的淬火加热温度,原则上亚共析钢为Ac_3+     

电热隧道窑炉温自动化测控系统的研究

介绍了一种由计算机、智能仪表等组成的自动化电热隧道窑炉温测控系统。这套系统不仅可随时将炉内各点温度记录、存储备查,同时还可通过计算机模拟将炉内各点温度分布曲线通过显示器显示出来,并能与预先设定的曲线进行比较,实现超温报警、断偶显示等功能,且在高温恒温区采用多点控制,使控制曲线理合理。     

机床主轴温升和热变形在线检测及显示系统

介绍应用计算机技术,实现机床主轴热变形试验各侧点的温度、热变形的在线检测和数据处理。     

基于LabVIEW的多点报警温度监测系统设计

为了实现温度的远程监测和多点报警,提出了一种基于LabVIEW的多点报警温度监测系统。该系统由以AT89C51为核心的温度监测装置和基于LabVIEW的上位机程序组成,它们之间通过串口进行通信实现远程监测。系统的主要特点是能自动在温度监测装置和上位机程序同步温度测量值和报警温度,当温度超过设定的报警温度时,能同时在温度监测装置和上位机程序报警,具有实时多点报警和控制灵活的优点。理论分析和实验结果表明,设计的系统能实现温度监测和报警功能,与基于数据采集卡的温度监测系统相比,报警成功率提高19%,且具有更好的扩展性。     

WDJ—Ⅱ型多点温度微机检测系统

城市集中供热可以合理利用能源,减少能源的消耗污染,改善生态环境。但是由于集中供热系统庞大,各个供热小区常常因不平衡造成有的地区温度低、有的地区温度偏高等不正常现象。为了提高热效率,调节各区之间的不平衡,我们研制了多点温度自动巡回检测微机系统,用来检测分散在各个小区的测温点的温度值。该装置不但数据准确可靠,操作简便,而且还具有显示、打印记录、声光报警等多种功能。     

用智能仪表改善井式气体氮化炉温度均匀性的分析与实践

我厂有一台已使用15年的RJJ-35-9T井式气体氮化炉,由于长期使用,电炉丝及炉衬都经过多次修补,炉子各段功率分配及各部位的散热储热状况都发生了很大变化,而控温方式仍沿用电子电位差计,通过交流接触器实现二位式调节,测温点在炉罐外壁三相电炉丝的中段,因此,炉温均匀性非常差,炉罐内与炉罐外三相电炉丝位置相对应的三点(上、中、下)和测温点比较在_(18)~(+50)℃范围内。众所周知,氮化工艺对温度控制精度的要求是非常严格的,一般应在±5℃内,不然,对氮化层的组织、性能和变形量都将产生不利影响。因此决定进行改造。     

低温密封酸溶——高分辨电感耦合等离子体质谱法测定地质样品中50个微量元素的评价

The method based on the determination of trace elements in geological samples by sector high resolution inductively coupled plasma mass spectrometry with mixed acid digestion procedure has been evaluated. The evaluation show that the results of 29 elements including Li, Cr, Co, Ni, Cu, Zn, Ga, Rb, Y, Cs, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, W, Tl, Bi, Th and U are satisfactory; V, Sr, Nb, Mo, In, Sb, Ba and Pb are acceptable; Sc, Cd, Hf, Ti, Mn, Fe, Ge and Sn have of large deviations, Be, Ta, Zr, As and Se are worse.     

An X-ray Diffractometer with a Mobile Emitter-Detector System

An X-ray diffractometer with a mobile emitter-detector system is able to perform various X-ray examinations of a stationary sample. The design for this instrument is described, along with its operating principles and control programs. Owing to its high-precision angular movement sensors and its two detectors (one of these, a linear position-sensitive detector, has a working length of 100 mm and a resolution of <0.2 mm), the diffractometer can be used in both traditional and nontraditional experiments on X-ray reflection, scattering, and absorption. Results from using this instrument in reflectometry and X-ray tomography are presented as an example.__________Translated from Pribory i Tekhnika Eksperimenta, No. 3, 2005, pp. 99–107.Original Russian Text Copyright © 2005 by Asadchikov, Babak, Buzmakov, Dorokhin, Glagolev, Zanevskii, Zryuev, Krivonosov, Mamich, L. Moseiko, N. Moseiko, Mchedlishvili, Savel’ev, Senin, Smykov, Tudosi, Fateev, Chernenko, Cheremukhina, Cheremukhin, Chulichkov, Shilin, Shishkov.     

微波消解-电感耦合等离子体质谱法测定食品中18种元素

建立了食品中钠、镁、铝、钾、钙、钒、铬、锰、铁、镍、铜、锌、砷、硒、镉、锡、汞、铅的电感耦合等离子体质谱（ICP–MS）测定方法。样品经过微波消解,在线加入内标校正基体效应,通过修正方程校正质量数干扰,各元素校正曲线的相关系数均大于0.9995。对多种国家生物标准物质进行验证,测定值与标准值相符,相对标准偏差RSD（n=6）小于8.71%,加标回收率为71.8%～109.5%。     

微波消解-电感耦合等离子体质谱法同时测定茶叶中42种元素

建立了电感耦合等离子体质谱法（IcP—Ms）标准模式和优化的碰撞池模式（CCT）结合同时测定茶叶中Li、Be、Mg、Al、V、Cr、Mn、Fe、Co、Ni、Cu、Zn、Ga、As、Se、Sr、Mo、Ag、Cd、Sn、Sb、Cs、Ba、Tl、Pb、Bi和16种稀土元素共42种元素的方法。样品经过微波消解,以Ge、In、Re为内标消除基体干扰,通过碰撞池技术消除多原子质谱干扰测定上述元素。对于所测元素校准曲线的相关系数均大于0．9990,回收率范围为90％-110％,相对标准偏差为0．22％-3．97％,大部分元素检出限均小于0．5μg·kg^-1。该方法简便、省时、准确、灵敏度高,适用于实际样品的检测。     

The CMD-2 cryogenic magnetic detector

The CMD-2 cryogenic magnetic detector used in a set of experiments on the VEPP-2M electron-positron collider at energies as great as 1.4 GeV is described. The design of the detector subsystems and the algorithms for reconstructing tracks in the drift chamber and the CsI and BGO calorimeters are presented. The spatial and energy resolutions of the detector systems have been determined from analysis of experimental data. The design of the superconducting solenoid and the layout of its powering by means of a superconducting transformer are shown. The trigger system of the detector and the conditions for recording “charged” and “neutral” events on a magnetic tape are described. The procedure used to monitor the parameters of the detector systems during the experiment is presented. Original Russian Text ? E.V. Anashkin, V.M. Aul’chenko, R.R. Akhmetshin, V.Sh. Banzarov, L.M. Barkov, S.E. Baru, N.S. Bashtovoi, D.V. Bondarev, A.E. Bondar’, A.V. Bragin, N.I. Gabyshev, D.A. Gorbachev, A.A. Grebenyuk, D.N. Grigor’ev, D.A. Epifanov, I.V. Zhuravkov, V.G. Zavarzin, A.S. Zaitsev, S.G. Zverev, F.V. Ignatov, V.F. Kazanin, S.V. Karpov, G.M. Kolachev, P.P. Krokovnyi, A.S. Kuz’min, I.B. Logashenko, P.A. Lukin, K.Yu. Mikhailov, V.A. Monich, M.A. Nikulin, A.B. Nomerotskii, V.S. Okhapkin, S.G. Pivovarov, A.S. Popov, T.A. Purlats, S.I. Redin, N.I. Root, A.A. Ruban, N.M. Ryskulov, A.L. Sibidanov, V.A. Sidorov, A.N. Skrinskii, V.P. Smakhtin, I.G. Snopkov, E.P. Solodov, P.Yu. Stepanov, A.I. Sukhanov, V.M. Titov, V.E. Fedorenko, G.V. Fedotovich, B.I. Khazin, A.G. Shamov, Yu.M. Shatunov, B.A. Shvarts, B.N. Shuvalov, D.V. Chernyak, S.I. Eidel’man, Yu.V. Yudin, 2006, published in Pribory i Tekhnika Eksperimenta, 2006, No. 6, pp. 63–79.     

顶空毛细管气相色谱法测定去氧孕烯中有机溶剂残留量

建立了顶空毛细管气相色谱法测定去氧孕烯中残留有机溶剂的方法。色谱柱为DB-624毛细管柱,柱温为程序升温,以氮气为载气,用氢火焰离子化检测器(FID)检测。在实验条件下,甲醇、乙醇、丙酮、正己烷、醋酸乙酯、四氢呋喃、环己烷回收率分别为98.5%、97.9%、97.3%、98.2%、97.2%、97.7%、98.5%%,精密度分别为1.7%、2.0%、1.5%、3.1%、1.5%、1.7%、2.2%。在去氧孕烯原料中只检测出了乙醇、丙酮。本法可快速、准确测定去氧孕烯中残留溶剂含量。     

ICP-MS测定硼矿区饮用水和尿样中的硼及多种元素

The application of inductively coupled plasma mass spectrometry (ICP-MS) for determination of boron in water and urine samples was described. The detect limit (3σ) was 0.057 μg/L. The precision of the method was less than 2%. Multi-elements including Cr, Cu, Cd, Ba, Sr, Mn, Co, Tl, Li, Pb, Ca, Fe, K, Na, Mg, P, Si and Zn could be measured simultaneously. The method was successfully used in practice.     

铣床数控轴进给系统设计

数控铣床是能源、航空、航天、船舶、舰船推进器、机车车辆、军工、汽车、机械工程、重型机床行业不可缺少的重要工艺加工设备。本文内容关于铣床数控轴进给系统的设计,包括机床的整体方案、传动系统结构、导轨等方面的研究。     

中国香菇风味成份的分离与鉴定

应用“同时蒸馏-萃取”(SDE)装置提取出干香菇的挥发性风味成份。再由旋转带式蒸馏器浓缩样品。经GC/MS鉴定出91种组份。包括硫醚、硫醇和含硫成环化合物、噻唑、呋嘀和吡嗪等类杂环化合物,以及醇、醛、酮、酯等。硫化物中的3,5-二甲基-1,2,4-三硫杂环戊烷首次被发现。     

A vertex microstrip detector of the SVD setup for experiments on the IHEP accelerator

A precision vertex microstrip detector has been developed for the spectrometer with a vertex detector (SVD) setup on which the properties of hadrons and short-lived unstable particles are investigated on the accelerator of the Institute for High Energy Physics. The structure and the design of the main detector components—microstrip sensors and an active target—are presented, as well as techniques for manufacturing them. The readout electronics, the data acquisition system, and its software are also described. The accuracy in determining the vertex position is 70–250 μm along the beam axis and 8–15 μm in a transverse direction at a throughput of 500–1000 events/s. Original Russian Text ? E.N. Ardashev, S.G. Basiladze, G.A. Bogdanova, M.V. Vasil’ev, V.Yu. Volkov, A.P. Vorob’ev, A.G. Voronin, S.N. Golovnya, S.A. Golubkov, S.A. Gorokhov, A.V. Gor’kov, Ya.V. Grishkevich, N.N. Egorov, V.B. Ezhov, P.F. Ermolov, E.G. Zverev, D.E. Karmanov, A.A. Kiryakov, Yu.F. Kozlov, V.A. Kramarenko, A.V. Kubarovskii, L.L. Kurchaninov, M.S. Levitskii, A.K. Leflat, S.I. Lyutov, V.Kh. Malyaev, M.M. Merkiv, A.A. Minaenko, G.Ya. Mitrofanov, V.V. Parakhin, V.S. Petrov, L.V. Pilavova, A.V. Pleskach, V.V. Popov, V.A. Sen’ko, A.I. Sidorov, M.M. Soldatov, L.A. Tikhonova, A.G. Kholodenko, Yu.P. Tsyupa, N.A. Shalanda, V.I. Yakimchuk, 2007, published in Pribory i Tekhnika Eksperimenta, 2007, No. 5, pp. 75–92.