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 共查询到19条相似文献,搜索用时 105 毫秒
1.
陈朴 《株冶科技》2000,28(3):35-37
详细介绍了对高金银含量粗铅的非常规检验方法即AB样检测法的实践及其效果,用事实验证了AB样检测法较之常规检测方法的优越性。  相似文献   

2.
高金银含量粗铅的AB样检测法   总被引:1,自引:0,他引:1  
陈朴 《湖南有色金属》2000,16(4):39-40,43
详细介绍了对高金银含量粗铅的非常规检验方法即AB样检测法的实践及其效果,用事实验证了AB样检测法较之常规检验方法的优越性。  相似文献   

3.
连文敬 《中国冶金》2011,21(8):8-11
钢包下渣检测技术在连铸生产中具有重要意义,它可以有效地提高铸坯质量、增加钢水收得率以及改善劳动条件。简述了目前国内外钢包下渣检测技术的原理和研究现状,包括电磁检测法、振动检测法、超声波检测法和红外检测法等,以及这些方法在工业生产中的应用效果和存在的主要问题,对上述钢包下渣检测方法的应用前景进行了展望。  相似文献   

4.
钢包下渣检测技术已成为现代连铸生产和质量控制的重要技术之一,它对防止钢包过量下渣,提高钢水纯净度、浇铸收得率和铸坯质量,改善劳动强度和工作环境均有明显的效果.介绍了称重检测法、电磁检测法、超声波检测法、振动检测法等下渣检测方法的原理及局限性,并对上述方法的应用进行探讨.  相似文献   

5.
对国内外高炉径向气流检测方法进行介绍,包括十字测温法、红外摄像法、压力检测法等。  相似文献   

6.
王勃  胡冲  王杰  王月宇  李宁 《中国冶金》2021,31(2):50-54
涡流检测法是非常常用的金属材料缺陷检测的无损检测方法,为了改进传统涡流检测法难以微型化的不足,提出了一种新型涡流检测法,分别用小永磁体和高精度磁传感器代替了传统涡流检测法的激励线圈和接受线圈。通过试验和数值模拟相结合的研究方法,对新型涡流检测法的原理及检测效果进行了研究。结果表明,新型涡流检测法的检测原理可行,检测装置简单,测量精度高,现有试验条件下可检测到50 μm量级的缺陷,且金属导体运动方向和永磁体磁化方向的涡流磁场分别呈现出对称负向脉冲和正弦式的变化特征,较优的导体运动速度和体力距离应为数米每秒和0.2 mm。  相似文献   

7.
在蒸发操作过程中,蒸发室的液位稳定十分重要,现在液位的检测一般采用目镜观察法,随着蒸发技术的发展,这种方法已不能满足需要。本通过对几种液位检测法的分析,重点介绍一种实用的液位检测法。  相似文献   

8.
常规X射线等在线检测系统无法有效地在线实时检测汽车板、电镀锌板、硅钢板等带钢的涂层膜厚,为此,研发了带钢涂层膜厚在线检测系统。系统主要由PLC控制装置、探头电控行走机构、冷却装置及终端计算机等构成,采用红外线非接触检测法,实现带钢耐指纹膜厚、钝化膜厚、涂油量和环保涂层的在线实时检测以及检测数据处理功能。现场应用效果证明系统的可靠性和检测精度均较高。  相似文献   

9.
针对道路塌陷的探查方法有许多,本文根据被检测区域的实际勘察情况,依靠检测手段的有效性,可靠性,选择地质雷达检测法,地震映像检测法对被测区域进行地面塌陷隐患探查。经过探查发现,被测区域具有脱空,土质疏松两大病害。为保证附近活动居民安全,建议相关负责主体对该区域进行修缮并加强安全监测。  相似文献   

10.
戴廷璋 《云南冶金》1996,25(5):21-25
论述了选厂浓度粒度连续快速检测的原理和方法,数据反映了过程的加权性质,可取代长期沿用的手工检测法,因而有使用价值。  相似文献   

11.
The detection of foodborne microorganisms has traditionally been done using microbiologically based methods. Such "gold standard" methods are generally reliable but have the disadvantages of being labor intensive, subjective, and time consuming. Over the last several years, the development of DNA probe-based methods has simplified the methods used to detect organisms such as Salmonella, Listeria, and E. coli by targeting the unique DNA or RNA sequences of these organisms using DNA probes and nonradioactive detection.  相似文献   

12.
Amplification methods for detection of Mycobacterium tuberculosis, such as polymerase chain reaction (PCR), have undergone much research and development in the last several years. The most common methods for extraction, amplification, and detection of mycobacterial nucleic acid sequences used in "in-house" PCR assays are discussed. A list of commercially prepared PCR and non-PCR amplification assays that should be available soon is included. The pros and cons of "in-house" versus commercial technology and issues of implementation of molecular technology in the clinical laboratory are reviewed.  相似文献   

13.
杜东  聂礼 《水钢科技》2020,(1):31-35
微波测水与其他测水方式相比较具有抗干扰性强,控制滞后相对较小,测量准确,安全可靠的特点,经过近几年的生产实践及不断完善,技术趋于成熟,可作为红外线测水后的一项升级换代技术,是烧结混合料测水技术的一个发展方向。本文介绍了微波测水自动控制系统的功能、微波测水与红外线测水的对比、微波测量水分自动加水在实际生产过程中应用情况、主要技术经济指标情况以及存在的不足。  相似文献   

14.
镓的光度分析近况   总被引:1,自引:0,他引:1  
张妮娜  邹洪  邰超  谷学新 《稀有金属》2002,26(4):294-298
镓的分析测定对于航天、电子、通讯、能源等行业的发展都具有重大意义。近年来各种新试剂、新方法的不断涌现 ,使镓的光度分析有了新的进展。通过对 90年代以来镓的光度分析进展予以综述 ,介绍了三苯甲烷染料、三羟基荧光酮、罗丹明B、偶氮、8 羟基喹啉 5 磺酸衍生物、希夫碱、桑色素、腙等几大类试剂在镓的分光光度和荧光光度分析中的应用 ,并对样品的分离富集方法作了评述。共引用国内文献 5 2篇。  相似文献   

15.
Epidermal growth factor (EGF) and EGF receptor in hypospadias   总被引:1,自引:0,他引:1  
Environmental oncology is a discipline concerned with studies of multi-aspect relationships between environment and living organisms exposed to the modifying influence of carcinogenic agents. It also deals with general biological regularities involved in neoplasm development as well as their prevention in different species including man, animals and plants. Various investigations conducted at the Laboratory and supported with Russian and foreign grants (1991-1996) are briefly discussed. Among them are biotesting environmental carcinogens (aminoanthraquinons, by-products of drinking water chlorination, development of new testing systems and objects of detection involved in identification of genotoxic substances (criteria for formation of short-term test batteries and evaluation of perspectives, methods and results), investigation of xenobiotic metabolic activation (enzyme imprinting in adult animals), search for anticarcinogens (classification of carcinogenesis inhibitors, development of testing systems for modifiers selection), and establishing environment-related regularities of tumor growth. Vistas in environmental oncology development are discussed.  相似文献   

16.
介绍了近10年来,金属及合金中铍的光度分析发展状况,讨论了测定体系及其条件,以及相应光度分析方法的检出限、干扰情况和测定范围。  相似文献   

17.
Distinct means have been developed to answer an increasing demand and need for methods that can accurately predict and detect the fertile phase of the menstrual cycle and fit various indications and changing situations of women's reproductive life. Methods based on the detection of direct fertility markers, such as hormonal tests and ultrasound, are more objective and accurate than traditional markers based on indirect markers, but cost and dependence on supplies limit their application. Nevertheless, these methods could be used during a few cycles either as support in the teaching phase or in difficult cases and for specific indications. Likewise, some new devices designed to facilitate recording and calculation of fertility signals could be combined with clinical methods to improve prediction and detection of the fertile phase. Besides the search for new fertility markers and the development of new methods, the possibility of combining already existing methods would certainly improve use-effectiveness and acceptance.  相似文献   

18.
This review is in support of the development of selective, reproducible and validated capillary electrophoretis (CE) methods. Focusing on pharmaceutical and biological applications, the successful use of CE is demonstrated by more than 800 references, mainly from 1994 until 1998. Approximately 80 recent reviews have been catalogued. These articles sum up the existing strategies for method development in CE, especially in the search for generally accepted concepts, but also looking for new, promising reagents and ideas. General strategies for method development were derived not only with regard to selectivity and efficiency, but also with regard to precision, short analysis time, limit of detection, sample pretreatment requirements and validation. Standard buffer recipes, surfactants used in micellar electrokinetic capillary chromatography (MEKC), chiral selectors, useful buffer additives, polymeric separation media, electroosmotic flow (EOF) modifiers, dynamic and permanent coatings, actions to deal with complex matrices and aspects of validation are collected in 20 tables. Detailed schemes for the development of MEKC methods and chiral separations, for optimizing separation efficiency, means of troubleshooting, and other important information for key decisions during method development are given in 19 diagrams. Method development for peptide and protein separations, possibilities to influence the EOF and how to stabilize it, as well as indirect detection are considered in special sections.  相似文献   

19.
本文主要研究了烟箱缺条检测系统软件设计方法。通过对数字图像处理技术的研究,并针对现场情况,提出了图像增强、纹理分析、模板匹配、直线检测等数字图像处理算法。基于视窗系统,在Visual C++开发平台上,设计了软件的体系结构,编写并调试了各功能模块。现场应用结果表明,系统满足设计要求,具有很高的检测精度和可靠性。  相似文献   

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