Post analysis

Before the performance of the loading we have to apply 5 up to 12 sensors, according their size, on the cylindrical part of the drums and after a short check of the required sensitivity and the wave propagation the pneumatic pressure test monitored by AE can be performed. The selection of the sensors and their positions was performed earlier in pre-tests under the postulate, that the complete cylinder can be tested with the same sensitivity, reliability and that furthermore the localisation accuracy of defects in the on-line- and the post analysis is sufficient for the required purpose. For the flat eovers, which will be tested by specific sensors, the geometrical shape is so complicated, that we perform in this case only a defect determination with a kind of zone-location. 

After the tests are finished during the post-analysis the NDT properties of AE will be used for the detection and roughly grading of defects within the material. 

Data Analysis For post analysis the following tasks are available on the same or another similar computer ... 

Chuaqui RE, et al. 2002. Post-analysis follow-up and validation of microarray experiments. Nature Genetics 32 509. 

As a process analytical solution, these extrinsic reactive approaches necessitate an extrinsic optode (see later discussion), an on-line sample conditioning system or an at-Une solution such as a flow injection analysis (FIA) system or other autonomous solutions. Reaction kinetics, post analysis cleanup such as rejuvenating a substrate (optode, immobilized based immunoassays, etc.) among other complexities are additional considerations for these types real-time analysis methods. ... 

Post-Analysis Compare predicted casualty levels with intelligence reports Compare spray patterns and measurements levels with mortality data... 

Underwater acoustics is routinely used in laboratory-scale test facilities for flaw detection, transducer calibration, material property evaluations, and acoustic visualization. In a typical underwater acoustic study, an object of interest is submerged in a water filled tank and acoustically illuminated (insonified). The acoustic signals scattered by the object are then measured and analyzed. If the tank used is not sufficiently large, these measured acoustic signals will include spurious echo components due to extraneous wall reflections. Since the effect of these contaminating echoes usually cannot be removed from the resulting data set by post analysis, they must be prevented from occurring at their source. One cost... 

X. Post-analysis Methods Column Design Calculations 166... 

Laser extinction measurements mapping the onset of carbon formation have been conducted. Carbon formation was quantified by the laser extinction measurement. Post analysis of carbon formed indicates the method and cause of carbon formation lead to different carbonaceous species. 

Current results indicate operational issues for the fuel processor subsystem to meet the DOE durability target of 5000 hours due to carbon formation and catalyst surface area. Upon post-analysis of the fuel processor, carbon formation was observed regardless... 

It is questionable whether this approach would be any better than the postdetection data manipulation techniques described in Section 4.3. The trade-off is between complexity of instrumental design and operation, programming complexity and post-measurement data processing time. As long as the instrument response could be correctly and precisely modelled in software, the balance would probably lie on the post-analysis processing side. 

The literature review also reveals that most simulation-based approaches lack a systematic procedure for deriving recommendations of improvements. Instead, most approaches still bear the stigma of rather descriptive models where a (pre-)selected number of scenarios is evaluated and compared. Potentials for improvement are not revealed directly this way. However, a systematic procedure for post-analysis of simulation models can lead to an exploration of the space of possible system configurations which allows deriving recommendations for improvements on a (more) reliable basis. This topic wfil be discussed in section 4.3.4. 

Therefore, a combination of objective psychoj ysiological indicators for strain with an ex post analysis of the existing stressor combinations might be a fruitful approach to analyzing design activities. Once a sequence of activities was identified as stressful by psychophysiological strain parameters, the sul ects were asked to give an interpretation of the situation (see Fig. 15.8). The subjects... 

The stress-and-strain concept, related measures and ex-post analysis was the stressor combination based on subjective statements. 

The production step generates the equilibrium phase-space trajectory from which some properties can he evaluated. During the simulation, some representative thermodynamic properties, such as site potentials, kinetic energies, displacements, diffusion coefficients, and momenta, are averaged every 40 timesteps (and written to an output file for post analysis). In addition, when thought necessary, the positions and velocities of all atoms may be recorded every timestep, or every so many (e.g., 50) timesteps, for later extraction of dynamic structural information. 

The post analysis results from a plant wide dynamics code MIMIR-N2 are in excellent agreement with the experimental data as shown in Fig. 12. Various key parameters are clarified to improve the calculation accuracy through the study. In the short-term analysis, the evaluation of thermo-hydraulic behavior in the core is largely affected by the inter-assembly heat transfer effect, the pump flow coast characteristics and coolant flow distribution. For the long-term analysis, it is important to assess precisely the buoyant head effect in the IHX, the heat exchange effects in the lower plenum of the IHX and others. The experimental result is also applied to the assessment of natural convection characteristics in the MONJU reactor. 

Fig. 5A-C. Gas chromatograms obtained simultaneously by FID (A) and PND (B) for a potato extract spiked with C27-steroidal alkaloids, 5a-cholestane, sterols, and steroidal sapogenins. Attenuation FID 2, PND 2 . Post-analysis reprocessing of the raw data from A and B (subtraction of the FID trace from the PND trace) is shown in C. 1 Octacosane 2 5a-cholestane 3 solanthrene 4 cholesterol 5 solanidine 6 demissidine 7 solasodiene 8 stigmasterol 9 diosgenin 10 tigogenin 11 solasodine 12 tomatidine 13 tetratriacontane 14 jervine. Column fused silica, 50m x 0.22 mm i.d., CP Sil 5cb, film thickness 0.12um. Carrier gas H2, linear velocity 49cms" oven temperature 270°C (Van Gelder et al. 1988)...

As mentioned in the previous Chapters, fault injection campaigns can be performed in different levels. The fault injection by simulation is performed by adding upsets when simulating a given system in commercial simulators, such as ModelSim from Mentor or iSim from Xilinx, or open source simulators, such as Spice. They are able to provide the best control over the experiment. This characteristic is because the simulation can be stopped at any simulation time and the internal values from anywhere inside the system can be read and stored for post-analysis. As a consequence, the amount of data is the biggest among the different levels of available fault injection campaigns types. 

Estimation of errors in the moment tensor analysis is fairly difficult (Ouyang, Landis et al. 1992). In the analysis of Fig. 8.10 (Ohtsu 1991), the conditioning numbers were applied. Then, error estimation was conducted, assuming the errors. As a result, it is found that the error estimation has been a really complicated task, because the errors are dependent on a spatial relation between the source location and the observation points. Consequently, a post analysis is proposed (Ohtsu 2000), where AE waves to be detected at the observation points are synthesized from the source location and the moment tensor theoretically. For the simulation analysis of theoretical AE waves, the technique discussed in Chapter 7 is available. 

Consequently, the post analysis was performed. AE waveforms at sensor locations were synthesized in an infinite space, taking into the source location and the moment tensor components. The reflection coefficient was taken into consideration to simulate the waveforms. The SiGMA procedure was applied to synthetic waveform set as the post analysis. Results are also given in Table 8.1. Because one event was located out of the specimen, results of 101 events are shown. Except this event, location errors between the SiGMA analysis and the post analysis were within 1 mm. But, the shear ratio changed drastically as found in Table 8.1. Following the post analysis, events of the shear ratio less than 10% different from those of the SiGMA analysis were selected as reliable solutions. 46 events were selected and are listed in Table 8.2. 

Table 8.2. Reliable solution after the post analysis ...

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