EXCEL2000在理化检验中的应用

本文阐述了在理化检验中应用EXCEL 2000进行检验数据回归分析、结果计算及应用其数据库功能登记管理样品,出具检验报告,还可应用该软件进行大量实验数据分析。     

博奕论在打假中的运用

我国自从80年代就开始打击假冒伪劣，取得的成绩有目共睹，但假冒伪劣现象并未根除，恶性制假售假事件屡有发生。1999年，全年共查处假冒伪劣商品标值21．7亿多元，端掉制窝点3700多个，查处违法案件4．7万多件。     

氦气压力对碳纳米管形成的影响

用热重分析和差热分析研究地流碳弧法中氦气压力对阴极沉积物－含纳米管碳灰中碳纳米管形成的影响，并与Ｃ６０／７０和石墨的ＤＴＡ曲线比较，结果表明：在研究范围内，氦压越高，碳纳米管与碳纳米粒子的比率越高。可用控制氦气压力调整碳纳米管与碳纳米粒子的比例。     

Coupled thermal stress problem in a hollow sphere under a partial heating

In a precise analysis of transient thermal stress problem, this requires the corrected heat equation taking into account of the thermo-mechanical coupling term. In this report, we deal with the transient thermal stress problem in a hollow sphere accompanied by the simultaneous determination of stress and temperature distributions. A new technique is developed in this report and numerical works are carried out. From our results, it should be concluded that the small lag can be found in case of ordinal practical materials.     

A qualitative analysis of medication use variance reports

BACKGROUND: This report of a process change utilized a qualitative approach to data analysis to improve medication use safety in a large hospital. The two goals were to design a strategy to analyze the qualitative data and to use that strategy to uncover previously unclassified medication use variance patterns that could be prevented. A multidisciplinary team performed the analysis in an effort to improve the quality and yield of the approach. METHODS: All medication use variance, incident, and event reports from Yale-New Haven Hospital during April-June 2000 were collected (N = 264). A 20% random sample of the reports was distributed to a five-member evaluation group (a pharmacist, two nurses, and two physicians) for independent qualitative analysis and coding. An initial coding framework was produced using a consensus process. This coding framework was applied to another sample, and the consensus and coding processes were repeated until no new domains were identified. RESULTS: Ten general medication use variance domains were determined. In addition, 21 subdomains among the various general domains were determined. DISCUSSION: Utilizing a multidisciplinary team and a qualitative strategy of analysis improved patient safety efforts. This combination led to the discovery of new variance domains, causes, and opportunities to intervene and ultimately prevent medication use variances. This analytic approach is widely applicable, adaptable, and dynamic. The design and results of this report improve on a strictly quantitative approach to medication use variance analysis. The approach employed by this report will be used to improve medication use safety within the Yale-New Haven Health System.     

Fabrication of Maxwell fish-eye spherical lenses and research on distribution profiles of gradient refractive index

We establish the equation of distribution of the refractive index of Maxwell fish-eye spherical lenses and report fabrication of Maxwell fish-eye spherical lenses using optical glasses. The distribution profiles are discussed for the process of ion exchanging, and the experimental results accord with the theoretical analysis.     

Production of ALICE microstrip detectors at ITC-irst

We report on the results from the production of 600 double-sided silicon microstrip detectors for the ALICE experiment. We present the fabrication process and some selected results from the electrical characterization of detectors and test structures. The large amount of experimental data allowed a statistically relevant analysis to be performed. The main technological aspects related to production yield optimization will also be addressed.     

Recent results from the Frejus experiment

Recent results from the Frejus experiment are discussed. Besides giving new limits on the nucleon lifetime we report on searches for Cygnus X3, SNA 1987a and dark matter induced events. In addition we present an analysis of the muon multiplicity deep underground in terms of the primary cosmic ray composition.     

浅谈实验室的比对与验证试验

介绍了比对和验证试验类型,举例说明了仪器比对和人员比对试验,并对测试结果进行了数理统计分析,提出了比对与验证试验应注意的问题。有计划地开展比对和验证试验,对提高实验室的检测水平,确保出具检验报告的质量具有重要意义。     

测量不确定度原理及在理化检验中的应用第一讲测量不确定度的基本概念及A类标准不确定度

介绍了测量不确定度原理及在理化检验中的应用。就不确定度的定义、分类、评定步骤和方法、报告与表示、有效位数等问题进行了讨论。并对金属材料拉伸试验结果测量不确定度作了详细评定，以作为在理化检验中应用的一个实例。     

对国产CT胶片质量及其发展前景的看法

本文叙述国内外几种CT胶片的测试结果。通过测得的数据分析CT胶片的性能对CT图像质量的影响，找出国产CT胶片与国外CT胶片的差距，并就CT胶片在我国的发展前景进行了探讨。     

Evaluation of Cryogenic Flow Meters: An Example in Non-Standard Experimental Design and Analysis

A number of difficult problems in experimental design and analysis were afforded by an experiment to evaluate the precision and accuracy of a new facility for calibrating cryogenic flow meters. Time order was an important variable, but could not be economically randomized. The design space was not rectangular and two important variables were intrinsically highly correlated. The resulting data had outliers, cycles, unexpected shifts and other dilticultics. This report chronicals the evolution of the design of the experiments and the analysis of the results.     

Digital shearing method for three-dimensional data extraction in holographic particle image velocimetry

We report a new digital shearing method for extracting the three-dimensional displacement vector data from double-exposure holograms. With this method we can manipulate both the phase and the amplitude of the recorded signal, which, like optical correlation analysis, is inherently immune to imaging aberration. However, digital shearing is not a direct digital implementation of optical correlation, and a considerable saving in computation time results. We demonstrate the power of the method by MATLAB simulation and discuss its performance with reference to optical analysis.     

Sensitivity analysis of simulations for magnetic particle inspection using the finite-element method

Magnetic particle inspection (MPI) is widely used for nondestructive evaluation in aerospace applications in which interpretation of inspection results is currently limited to empirical knowledge and experience-based approaches. Advances in computational magnetics, particularly the use of finite-element calculations, have enabled realistic numerical simulations of magnetic particle inspection to be undertaken with complicated geometries. In this paper, we report a sensitivity analysis using finite-element-method simulations of magnetic particle inspection for defects with various sizes and geometries. As a result, improved quantitative understanding of the MPI technique and factors that affects its sensitivity and reliability has been achieved. These results can be used to optimize conditions for conducting these inspections and should lead to improvement in analysis and interpretation of experimental results.     

Negative Differential Transconductance and Nonreciprocal Effects in a Y-Branch Nanojunction: High-Frequency Analysis

We report on negative differential transconductance (NDT) effect in Y-branch nanojunctions which leads to small-signal nonreciprocity of the device for certain biasing schemes. We present the dc analysis of the device from which we identify the bias regions where NDT effect occurs. We compare experimental dc measurements with results of Monte Carlo simulations, which yields very good qualitative and quantitative agreement. We perform a high-frequency analysis of the NDT effect up to 110 GHz which shows that the effect discussed is still present at such high frequencies     

A solid sample preparation method that reduces signal suppression effects in the MALDI analysis of peptides

Here we report on the application of a solid-solid (SS) sample preparation protocol for the MALDI analysis of peptides and multicomponent peptide mixtures. Our results with a series of model peptides indicate that a SS MALDI sample preparation protocol is useful for the analysis of peptides in the 1-3 kDa mass range. MALDI mass spectra recorded for peptides in this size range using a SS sample preparation were of a quality comparable to spectra recorded using a conventional dried-droplet (DD) sample preparation. Our results with several model peptide mixtures indicate that one advantage of a SS sample preparation protocol for the MALDI analysis of peptides is that it can significantly reduce signal suppression effects in multicomponent mixtures. MALDI results obtained using a SS sample preparation protocol are also more reproducible than results obtained using a conventional DD sample preparation protocol.     

Automated multiple failure FMEA

Failure mode and effects analysis (FMEA) is typically performed by a team of engineers working together. In general, they will only consider single point failures in a system. Consideration of all possible combinations of failures is impractical for all but the simplest example systems. Even if the task of producing the FMEA report for the full multiple failure scenario were automated, it would still be impractical for the engineers to read, understand and act on all of the results.This paper shows how approximate failure rates for components can be used to select the most likely combinations of failures for automated investigation using simulation. The important information can be automatically identified from the resulting report, making it practical for engineers to study and act on the results. The strategy described in the paper has been applied to a range of electrical subsystems, and the results have confirmed that the strategy described here works well for realistically complex systems.     

约束全局优化问题的一个单参数填充函数方法

类似于无约束全局优化问题,本文给出了求解约束全局优化问题的一个填充函数方法,首先给出了约束全局优化问题的填充函数定义,在此定义的基础上提出了一个单参数填允函数.讨论了该函数的性质,并设计了一个填充函数算法,数值计算结果显示该算法是有效的和可行的.     

Dedicated optoelectronic stochastic parallel processor for real-time image processing: motion-detection demonstration and design of a hybrid complementary-metal-oxide semiconductor- self-electro-optic-device-based prototype

We report experimental results and performance analysis of a dedicated optoelectronic processor that implements stochastic optimization-based image-processing tasks in real time. We first show experimental results using a proof-of-principle-prototype demonstrator based on standard silicon-complementary-metal-oxide-semiconductor (CMOS) technology and liquid-crystal spatial light modulators. We then elaborate on the advantages of using a hybrid CMOS-self-electro-optic-device-based smart-pixel array to monolithically integrate photodetectors and modulators on the same chip, providing compact, high-bandwidth intrachip optoelectronic interconnects. We have modeled the operation of the monolithic processor, clearly showing system-performance improvement.