Study on the Problem of Target Area Selection of CO<sub>2</sub> Geological Storage in China

Background. The tumor volume of high-grade glioma (HGG) after surgery is usually determined by contrast-enhanced MRI (CE-MRI), but the clinical target volume remains controversial. Functional magnetic resonance imaging (multimodality MRI) techniques such as magnetic resonance perfusion-weighted imaging (PWI) and diffusion-tensor imaging (DTI) can make up for CE-MRI. This study explored the survival outcomes and failure patterns of patients with HGG by comparing the combination of multimodality MRI and CE-MRI imaging with CE-MRI alone. Methods. 102 patients with postoperative HGG between 2012 and 2016 were included. 50 were delineated based on multimodality MRI (PWI, DTI) and CE-MRI (enhanced T1), and the other 52 were delineated based on CE-MRI as control. Results. The median survival benefit was 6 months. The 2-year overall survival, progression-free survival, and local–regional control rates were 48% vs. 25%, 42% vs. 13.46%, and 40% vs. 13.46% for the multimodality MRI and CE-MRI cohorts, respectively. The two cohorts had similar rates of disease progression and recurrence but different proportions of failure patterns. The univariate analysis shows that characteristics of patients such as combined with epilepsy, the dose of radiotherapy, the selection of MRI were significant influence factors for 2-year overall survival. However, in multivariate analyses, only the selection of MRI was an independent significant predictor of overall survival. Conclusions. This study was the first to explore the clinical value of multimodality MRI in the delineation of radiotherapy target volume for HGG. The conclusions of the study have positive reference significance to the combination of multimodality MRI and CE-MRI in guiding the delineation of the radiotherapy target area for HGG patients.

Download Full-text

Selection of Target Area for Interventional and Cell Therapy after Myocardial Infarction Using 3d Echocardiography

2008 First International Conference on Complexity and Intelligence of the Artificial and Natural Complex Systems. Medical Applications of the Complex Systems. Biomedical Computing ◽

10.1109/cans.2008.31 ◽

2008 ◽

Author(s):

Claudia Matei ◽

Theodora Benedek ◽

Monica Chitu ◽

Istvan Benedek Jr. ◽

I. A. Sarbu-Pop ◽

...

Keyword(s):

Myocardial Infarction ◽

Cell Therapy ◽

3D Echocardiography ◽

Target Area ◽

Selection Of

Download Full-text

Application of Simple Additive Weighting Method to Determine Outstanding School Principals

SinkrOn ◽

10.33395/sinkron.v3i2.10082 ◽

2019 ◽

Vol 3 (2) ◽

pp. 186 ◽

Cited By ~ 1

Author(s):

Febri Haswan

Keyword(s):

School Principals ◽

Selection Process ◽

Surrounding Area ◽

Weighting Method ◽

Area Selection ◽

Weight Value ◽

Simple Additive Weighting ◽

Selection Of

The principal is a teacher who is given an additional assignment to be a leader in a school, the task of the principal can regulate, control and empower the community in the surrounding area, selection of outstanding school principals, so far both the school and Kuantan Singingi District Education Office determine the outstanding headmaster does not have an application that can simplify the work in calculating the weight value to determine the principals who are pretending, the assessment carried out so far is only manual, the application of the SAW method is used to select the best alternative from a number of alternatives - each participant will be ranked from highest to lowest. The results obtained from this study are that the system built can facilitate selection, so the selection process becomes more effective, efficient and transparent.

Download Full-text

Sensitivity Analysis Strategy to Assess the Salting-Out Problem during CO2 Geological Storage Process

Shock and Vibration ◽

10.1155/2021/2809467 ◽

2021 ◽

Vol 2021 ◽

pp. 1-14

Author(s):

Jie Ren ◽

Di Feng

Keyword(s):

Sensitivity Analysis ◽

Sensitivity Coefficient ◽

The Other ◽

Saline Aquifers ◽

Geological Storage ◽

Residual Saturation ◽

Salting Out ◽

Global Sensitivity ◽

Deep Saline Aquifers ◽

Selection Of

The sensitivity analysis of the salting-out effect on well injectivity is a significant work in the research of geological storage of CO2 in deep saline aquifers, which is helpful in the selection of storage sites and the design of the injection strategy. We conduct a detailed sensitivity analysis about the salting-out process using the local sensitivity method and two global sensitivity methods. Sensitivity coefficients showed that brine salinity (XNaCl) has the highest sensitivity and interaction effect, the CO2 injection rate (QCO2) has a greater influence in the early stage of the salting-out process and a smaller influence in the end stage, and the other three parameters (empirical parameters related to the pore distribution m, the liquid residual saturation in the relative permeability function Splr, and the liquid residual saturation in the capillary pressure function Sclr) have a smaller sensitivity. This paper also analyzes the calculation amount of different sensitivity methods and suitable ways of obtaining the sensitivity coefficient and reveals the following. (1) The sensitivity coefficient changes dynamically with time, if only the sensitivity of the final state is taken into account on a long-time physical process, and some sensitive parameters during the process may be neglected. (2) The selection of the sample size should be based on the convergence of multiple calculations, and the results of the empirical calculation are uncertain. (3) The calculation of Sobol sensitivity is complicated, the results calculated by surrogate model depend on whether the sample is representative enough; on the other hand, it is feasible to use Sti-Si approximation to characterize the second-order sensitivity to reduce the computation. The research results not only reveal the sensitivity of the parameters related to the injection well salting-out problem during CO2 storage in deep saline aquifers but also guide the calculation of global sensitivity analysis with a similar physical process.

Download Full-text