scholarly journals Hydrogeochemical Characteristics and the Suitability of Groundwater in the Alluvial-Diluvial Plain of Southwest Shandong Province, China

Water ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1577 ◽  
Author(s):  
Zongjun Gao ◽  
Jiutan Liu ◽  
Jianguo Feng ◽  
Min Wang ◽  
Guangwei Wu
Keyword(s):  
Water Samples ◽  
Comprehensive Evaluation ◽  
Saturation Index ◽  
Social Economy ◽  
Fuzzy Comprehensive Evaluation ◽  
Shandong Province ◽  
Groundwater Samples ◽  
Mixed Types ◽  
Better Than

The alluvial-diluvial plain of southwest Shandong Province is an important agricultural economic zone and energy base in Shandong Province. Groundwater plays an extremely significant role in the development of the regional social economy. In this study, 50 sets of water samples, collected from 25 wells during October 2016 and June 2017, were utilized to determine the hydrogeochemistry and the suitability of groundwater in the alluvial-diluvial plain of southwest Shandong Province for different applications, such as drinking and irrigation. Most of the water samples could be classified as hard-fresh water or hard-brackish water, and the dominant water types were HCO3-Na and mixed types. Water-rock interactions and evaporation were the dominant controlling factors in the formation of the hydrochemical components in the groundwater. Dissolutions of silicate, calcite, dolomite, and gypsum are the major reactions contributing and defining the groundwater chemistry in this plain. Moreover, cation exchange is a non-negligible hydrogeochemical process in this plain. Calculated saturation index (SI) values indicate that aragonite, calcite and dolomite are saturated, while the SI values for gypsum and halite are unsaturated. Based on fuzzy comprehensive evaluation, the groundwater quality ranges from excellent to very poor. More than 50% of all groundwater samples from 2016 are categorized as poor or very poor, suggesting that the water from these wells is not suitable for drinking. According to the sodium adsorption ratio and percentage sodium, most of the samples are suitable for agricultural irrigation. Overall, the quality of the groundwater in 2017 was found to be better than in 2016.

scholarly journals IMAGE QUALITY ASSESSMENT OF HIGH-RESOLUTION SATELLITE IMAGES WITH MTF-BASED FUZZY COMPREHENSIVE EVALUATION METHOD

2018 ◽  
Vol XLII-3 ◽  
pp. 1907-1914 ◽  
Author(s):  
Z. Wu ◽  
Z. Luo ◽  
Y. Zhang ◽  
F. Guo ◽  
L. He
Keyword(s):  
High Resolution ◽  
Image Quality ◽  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Fuzzy Comprehensive Evaluation ◽  
Fuzzy Evaluation ◽  
Fuzzy Comprehensive Evaluation Method ◽  
Comprehensive Evaluation Method ◽  
Better Than

A Modulation Transfer Function (MTF)-based fuzzy comprehensive evaluation method was proposed in this paper for the purpose of evaluating high-resolution satellite image quality. To establish the factor set, two MTF features and seven radiant features were extracted from the knife-edge region of image patch, which included Nyquist, MTF0.5, entropy, peak signal to noise ratio (PSNR), average difference, edge intensity, average gradient, contrast and ground spatial distance (GSD). After analyzing the statistical distribution of above features, a fuzzy evaluation threshold table and fuzzy evaluation membership functions was established. The experiments for comprehensive quality assessment of different natural and artificial objects was done with GF2 image patches. The results showed that the calibration field image has the highest quality scores. The water image has closest image quality to the calibration field, quality of building image is a little poor than water image, but much higher than farmland image. In order to test the influence of different features on quality evaluation, the experiment with different weights were tested on GF2 and SPOT7 images. The results showed that different weights correspond different evaluating effectiveness. In the case of setting up the weights of edge features and GSD, the image quality of GF2 is better than SPOT7. However, when setting MTF and PSNR as main factor, the image quality of SPOT7 is better than GF2.

scholarly journals ASSESSMENT OF HYDROCHEMICAL QUALITY OF GROUND WATER UNDER SOME URBAN AREAS WITHIN SANA’A SECRETERIAT

2018 ◽  
Vol 35 (1) ◽  
pp. 77 ◽  
Author(s):  
Wadie S.T AL- Ariqi ◽  
Abduljalil A.D.S Ghaleb
Keyword(s):  
Water Quality ◽  
Ground Water ◽  
Water Samples ◽  
Urban Areas ◽  
Saturation Index ◽  
Quality Parameters ◽  
Base Exchange ◽  
Groundwater Samples ◽  
Almost All

Groundwater from nine wells of three different districts, located at Sana’a  secretariat was analyzed for hydrochemical quality assessment. Measurements of water quality parameters including pH, EC, CO32-, HCO3-,Cl-,NO3-,SO4 2-,Ca2+, Mg2+, Fe3+, K+, and Na+ were carried out . Classification of the groundwater samples according to Cl, SO4 2-, CO32- and HCO3-, hardness(H), total dissolved solids (TDS), base-exchange, and meteoric genesis was demonstrated. Suitability of ground water samples for irrigation and industrial uses according to sodium adsorption ration (SAR), ratio of dissolved sodium (RDS), residual sodium carbonate (RSC) and saturation index (SI) was also investigated. The results of this study showed that almost all ground water samples were of good quality that makes them suitable for drinking and  domestic uses. Results also indicated that even though some of the ground water samples were suitable for irrigation purposes, almost all of them were found not be good for industrial uses. Despite all drawbacks of the sewerage system built around Sana’a secretariat at the beginning of the first decade of the third millennium, the results of this study indicate that there is scope of significant improvement in Sana’a secretariat ground water quality.

scholarly journals Hydrochemical Characteristics of Groundwater and Dominant Water–Rock Interactions in the Delingha Area, Qaidam Basin, Northwest China

Water ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 836 ◽  
Author(s):  
Biao Zhang ◽  
Dan Zhao ◽  
Pengpeng Zhou ◽  
Shen Qu ◽  
Fu Liao ◽  
...  
Keyword(s):  
Water Samples ◽  
Qaidam Basin ◽  
Flow Direction ◽  
Groundwater Resources ◽  
Saturation Index ◽  
Northwest China ◽  
Ion Concentration ◽  
Groundwater Samples ◽  
Mountain Front ◽  
Rational Management

Groundwater is undoubtedly important for water supplies and eco-environment protection, especially for arid and semi-arid regions. Analyzing the characteristics and evolution of groundwater is significant for the rational management of groundwater resources. This study investigated the hydrogeochemical characteristics and evolutions of groundwater in the Delingha area, northeast of the Qaidam Basin, northwest China, with a total of 123 water samples, including 105 unconfined groundwater samples, 12 confined groundwater samples, and 6 surface water samples. Hydrochemical results showed that the unconfined and confined groundwater presented diversity in ion concentration. Total Dissolved Solids (TDS) of the unconfined groundwater increased from 146.5 to 8954 mg/L along the groundwater flow direction. The groundwater hydrochemical types were HCO3-Ca·Mg and HCO3·SO4-Ca·Mg in the mountain front area, SO4·HCO3-Ca·Mg and SO4·Cl-Ca·Mg types in the alluvial-lacustrine plain, and Cl·SO4-Na and Cl-Na types in the lacustrine plain. The saturation index showed that parts of the groundwater samples were supersaturated with carbonate minerals (calcite and dolomite); however, all the samples were undersaturated with evaporite minerals (halite and gypsum). Groundwater chemical evolution is mainly controlled by evaporite and carbonate mineral dissolutions, aluminosilicates weathering, and cation exchange.

Making-Decision of Selecting Outstanding Teachers in University Based on Fuzzy Comprehensive Evaluation Method

2011 ◽  
Vol 219-220 ◽  
pp. 814-819 ◽  
Author(s):  
Jun Liu ◽  
Yan Li
Keyword(s):  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Fuzzy Comprehensive Evaluation ◽  
Teaching Staff ◽  
High Quality ◽  
Fuzzy Comprehensive Evaluation Method ◽  
Comprehensive Evaluation Method ◽  
Outstanding Teachers ◽  
Rational Evaluation

Evaluation of teachers is one of the most important sectors for colleges and universities to foster a high-quality teaching staff influencing the training qualities of students directly. Scientific and rational evaluation of teachers has the important guide functions to improve the quality of teachers, inspire teachers' potential and creativity and encourage teachers to make constant progress. It is difficult to evaluate one teacher objectively and fairly using the ordinary evaluation method for the influencing factors are more and complex. The fuzzy comprehensive evaluation method of selecting outstanding teachers in university is proposed in this paper, its main goal is to make the scientific and rational evaluation on one teacher and select outstanding teachers. Finally, an example of fuzzy comprehensive evaluation on one certain teacher for the illustration of the proposed method is represented, the result indicates that the scientific and rational evaluate result is provided by the fuzzy comprehensive evaluation method.

Application Study of Fuzzy Comprehensive Evaluation Method on Ammunition Management in Rear Depot

2012 ◽  
Vol 239-240 ◽  
pp. 1476-1479
Author(s):  
Xin Hui Zhang ◽  
Hong Liang Pan ◽  
Shi Liang Yang ◽  
Teng Li ◽  
Qing Zhang
Keyword(s):  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Evaluation Model ◽  
Evaluation Process ◽  
Fuzzy Comprehensive Evaluation ◽  
Application Study ◽  
Comprehensive Evaluation Method ◽  
Management Quality ◽  
Objective System

Aiming at the quality of ammunition management in rear depot, this paper determines an evaluation objective system and makes a detailed analysis on its structure. On the basis of this, an evaluation model for ammunition management quality--tree structure model for multi-objective and multistage fuzzy comprehensive evaluation is proposed. Examples are used to demonstrate its evaluation process.

Grindability Evaluation of Advanced Ceramics

2004 ◽  
Vol 471-472 ◽  
pp. 132-135 ◽  
Author(s):  
Ai Bing Yu ◽  
L.J. Zhong ◽  
Xin Li Tian
Keyword(s):  
Evaluation System ◽  
Comprehensive Evaluation ◽  
Fuzzy Comprehensive Evaluation ◽  
Experimental Results ◽  
Fuzzy Evaluation ◽  
Grinding Forces ◽  
Principal Stresses ◽  
Advanced Ceramics ◽  
Evaluation Theory ◽  
Better Than

Evaluation system of grindability was proposed for advanced ceramics. Grinding forces and material removals of SiC, Al2O3, Si3N4 and ZrO2 were measured. Grindabilities of ceramics were evaluated with property parameters based on fuzzy comprehensive evaluation theory. The experimental results suggest that grindabilities of SiC and Al2O3 are better than those of Si3N4 and ZrO2. The fuzzy evaluation results show grindabilities of SiC and Al2O3 ceramics are classified as grade of very easy to grind, and Si3N4 and ZrO2 are classified as grade of difficult to grind. The ranking of maximum grinding principal stresses of ceramics considering Poisson’s ratio is SiC, Al2O3, ZrO2 and Si3N4. Theoretical analysis calculated with property parameters is consistent with experimental results in comparison of grinding output parameters. The proposed evaluation system for ceramic grindability is feasible, and the evaluated results are comprehensive and reasonable.

Research on the Decision Making of Large Public Building Maintenance Cycle

2011 ◽  
Vol 243-249 ◽  
pp. 6302-6306
Author(s):  
Qian Wu ◽  
Shu Hua Gao ◽  
Hua Tang
Keyword(s):  
Decision Making ◽  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Fuzzy Comprehensive Evaluation ◽  
Public Buildings ◽  
Public Building ◽  
Building Maintenance ◽  
Maintenance Cycle ◽  
Safety And Reliability

Combination with the characteristics of large public buildings, taking well considerations of maintenance of buildings on safety and reliability of the circumstances. Decision-making models of the large public building maintenance cycle was proposed based on maintenance of quality comprehensive evaluation. To quantify the degree of recovery of large public buildings based on the quality of maintenance using the method of AHP and Multi-level fuzzy comprehensive evaluation method. To make reasonable amendments on the reliability of experience according to the recovery degree of the reliability. In order to calculate the maintenance cycle of the large public buildings , the two models of maximum reliability and minimum total cost of building structure and equipment pipe components are applying with, and then to making dynamic arrangements of preventive maintenance cycle according to the quality of the maintenance.

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