Готові списки джерел за темами / Soil consolidation Computer programs

Добірка наукової літератури з теми "Soil consolidation Computer programs"

Автор: Grafiati

Опубліковано: 10 грудня 2022

Оновлено: 29 січня 2023

Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями

Оберіть тип джерела:

Зміст

Статті в журналах
Дисертації
Книги
Частини книг
Тези доповідей конференцій

Ознайомтеся зі списками актуальних статей, книг, дисертацій, тез та інших наукових джерел на тему "Soil consolidation Computer programs".

Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.

Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.

Статті в журналах з теми "Soil consolidation Computer programs"

Wulandari, Tika Ermita. "Prediksi Penurunan Konsolidasi Menggunakan Preloading dan Prefabricated Vertical Drain dengan Software Metode Elemen Hingga." JOURNAL OF CIVIL ENGINEERING BUILDING AND TRANSPORTATION 5, no. 2 (September 24, 2021): 99–108. http://dx.doi.org/10.31289/jcebt.v5i2.5844.

Повний текст джерела

Анотація:

Consolidation is the process of removing water from the pores of the soil which causes changes in the volume of the soil which results in damage to the construction above it. This is more fatal if the decline that occurs is local. Nowadays the use of vertical drains is increasingly in demand, especially with the Prefabricated Vertical Drain (PVD) system which can reduce the time of the soil consolidation process significantly from several years to a matter of months and with technological advances, software is created that can make it easier to calculate construction work with computer programs, one of which is the only finite element method software (Plaxis) to calculate the consolidation settlement process. This study aims to analyze using Finite Element Method software with the help of 2D and 3D plaxis programs to get the consolidation settlement size. The results of 2D and 3D modeling will be compared so that the results that are closest to the field conditions are obtained. From the results of the analysis, it can be concluded that the magnitude of the decrease in Plaxis 3D is closer to the settlement plate data S29 with a decrease of 6.956m or a difference of -0.234m, while the magnitude of the decrease in Plaxis 2D is 7.491 with a difference of decrease of 0.301m.

Стилі APA, Harvard, Vancouver, ISO та ін.

Yin, Jian-Hua, and Wei-Qiang Feng. "A new simplified method and its verification for calculation of consolidation settlement of a clayey soil with creep." Canadian Geotechnical Journal 54, no. 3 (March 2017): 333–47. http://dx.doi.org/10.1139/cgj-2015-0290.

Повний текст джерела

Анотація:

The calculation of the consolidation settlement of clayey soils with creep behaviour has been a challenging issue with a long history. After a brief review the assumptions made in the two methods based on Hypothesis A and Hypothesis B, the authors present a new simplified hypothesis B method for calculation of consolidation settlement of a clayey soil with creep. Equations of this method are derived based on the “equivalent time” concept for different stress–strain states. This simplified Hypothesis B method is then used to calculate the consolidation settlement of a number of typical consolidation problems. The approximation and verification of this simplified method are examined by comparing the calculated settlements with settlements computed using two fully coupled finite element (FE) consolidation analysis programs using elastic viscoplastic (EVP) constitutive models (Hypothesis B) and the Hypothesis A method. It is found that the curves calculated using the new Hypothesis B simplified method with a factor α = 0.8 are close to curves from two FE model simulations with relative errors in the range 0.37%∼8.42% only for three layers of Hong Kong marine clay (HKMC). In overall, the settlements calculated using Hypothesis A method are smaller than those from the two FE simulations with relative error in the range 6.52%∼46.17% for the three layers of HKMC. In addition, this new simplified Hypothesis B method is used to calculate the average strain of consolidation tests done by Berre and Iversen in 1972. The calculated results are compared with the test data, and values from a fully coupled finite difference (FD) consolidation analysis using Yin and Graham’s EVP constitutive model (Hypothesis B), and Hypothesis A method. It is found that, again, the results from the new simplified Hypothesis B method are very close to the measured data. In conclusion, the new simplified Hypothesis B method is a suitable simple method, by spread-sheet calculation of the consolidation settlement of a single layer of a clayey soil with creep.

Стилі APA, Harvard, Vancouver, ISO та ін.

Catanzaro, C. J., C. L. Fenderson, and R. J. Sauve. "Consolidation of Agricultural Programs at Tennessee State University." HortScience 31, no. 4 (August 1996): 650d—650. http://dx.doi.org/10.21273/hortsci.31.4.650d.

Повний текст джерела

Анотація:

The Dept. of Agricultural Sciences currently offers degrees at both the undergraduate and graduate levels. Undergraduate programs in Plant Science, Animal Science, and Rural Development were consolidated within the Dept. of Agricultural Sciences in the late 1980s due to the declining number of graduates. However, no personnel turnover or course changes occurred due to consolidation. Enrollment at the undergraduate level has doubled within the past 5 years. Student enrollment for Fall 1995 included 127 undergraduates and 31 graduate students. Graduation figures projected for 1995–96 include 26 undergraduates and 8 graduate students. Horticulture and Agronomy are now two of the concentrations available for the BS degree in Agricultural Sciences, and Plant Science is an option for the MS degree in Agricultural Sciences. Presently in the plant sciences there are approximately 30 undergraduates and 20 MS students. Faculty and professional staff affiliated with the Cooperative Agricultural Research Program are encouraged to submit teaching proposals to the 1890 Institution Capacity Building Grants Program, a USDA-funded competitive program for the agricultural sciences. Awards enable grantee institutions to attract more minority students into the agricultural sciences, expand institutional linkages, and strengthen education in targeted need areas. The Grants Program supports teaching projects related to curricula design, materials development, and faculty and student enhancement. Current teaching grants address graduate and undergraduate education in molecular biology and undergraduate education in soil sciences.

Стилі APA, Harvard, Vancouver, ISO та ін.

Chen, Deqiang, Junhui Luo, Xianlin Liu, Decai Mi, and Longwang Xu. "Improved Double-Layer Soil Consolidation Theory and Its Application in Marine Soft Soil Engineering." Journal of Marine Science and Engineering 7, no. 5 (May 18, 2019): 156. http://dx.doi.org/10.3390/jmse7050156.

Повний текст джерела

Анотація:

Marine soft soil foundation is a double-layer foundation structure with a crust layer and soft substratum. Moreover, it is common that there are various forms of drainage. Accordingly, based on Terzaghi’s consolidation theory and the continuous drainage boundary conditions theory of controllable drainage conditions, an improved double-layer soil consolidation theory considering continuous drainage boundary conditions was proposed. To improve the computational efficiency and accuracy, the Laplace transform and the Stehfest algorithm was used to deduce the numerical solution of the improved double-layer soil consolidation theory considering continuous drainage boundary conditions and to compile a computer program. Subsequently, the theory was validated and analyzed by the degenerated model of the perfectly permeable boundary conditions and the semi-permeable boundary conditions, respectively, which showed that this theory has higher accuracy. Simultaneously, the analysis of double-layer consolidation settlement under continuous drainage boundary conditions for marine soft soil foundation of Guangxi Binhai Highway was carried on. The result showed that the consolidation settlement calculated by the improved double-layer consolidation theory presented is basically consistent with the field measurement results, and that the correlation coefficient between them is higher. Accordingly, the research results can provide useful basic information for marine soft foundation engineering.

Стилі APA, Harvard, Vancouver, ISO та ін.

Lu, Yue, and Gang Mei. "A Deep Learning Approach for Predicting Two-Dimensional Soil Consolidation Using Physics-Informed Neural Networks (PINN)." Mathematics 10, no. 16 (August 16, 2022): 2949. http://dx.doi.org/10.3390/math10162949.

Повний текст джерела

Анотація:

The unidirectional consolidation theory of soils is widely used in certain conditions and approximate calculations. The multidirectional theory of soil consolidation is more reasonable than the unidirectional theory in practical applications but is much more complicated in terms of index determination and solution. To address the above problem, in this paper, we propose a deep learning method using physics-informed neural networks (PINN) to predict the excess pore water pressure of two-dimensional soil consolidation. In the proposed method, (1) a fully connected neural network is constructed; (2) the computational domain, partial differential equation (PDE), and constraints are defined to generate data for model training; and (3) the PDE of two-dimensional soil consolidation and the model of the neural network are connected to reduce the loss of the model. The effectiveness of the proposed method is verified by comparison with the numerical solution of PDE for two-dimensional consolidation. Moreover, the FEM and the proposed PINN-based method are applied to predict the consolidation of foundation soils in a real case of Sichuan Railway in China, and the results are quite consistent. The proposed deep learning approach can be used to investigate large and complex multidirectional soil consolidation.

Стилі APA, Harvard, Vancouver, ISO та ін.

Wu, Wenbing, Mengfan Zong, M. Hesham El Naggar, Guoxiong Mei, and Rongzhu Liang. "Analytical solution for one-dimensional consolidation of double-layered soil with exponentially time-growing drainage boundary." International Journal of Distributed Sensor Networks 14, no. 10 (October 2018): 155014771880671. http://dx.doi.org/10.1177/1550147718806716.

Повний текст джерела

Анотація:

In this article, the exponentially time-growing drainage boundary is introduced to study the one-dimensional consolidation problem of double-layered soil. First, the one-dimensional consolidation equations of soil underlying a time-dependent loading are established. Then, the analytical solution of excess pore water pressure and average consolidation degree is obtained by utilizing the method of separation of variables when the soil layer is separately undergone instantaneous load and single-stage load. The validity of the present solution is proven by the comparison with other existing analytical solution. Finally, the influence of soil properties and loading scheme on the consolidation behavior of soil is investigated in detail. The results indicate that, the present solution can be degraded to Xie’s solution utilizing Terzaghi’s drainage boundary by adjusting the interface parameter, that is to say, Xie’s solution can be regarded as a special case of the present solution. The interface parameter has a significant influence on the excess pore water pressure of soil, and the larger interface parameter means the better drainage capacity of the soil layer.

Стилі APA, Harvard, Vancouver, ISO та ін.

Song, Xiu Guang, Xiu Yuan Ma, and Jin Zhang Liu. "Study on Finite Dynamic Element Method for Dynamic Consolidation." Key Engineering Materials 261-263 (April 2004): 567–72. http://dx.doi.org/10.4028/www.scientific.net/kem.261-263.567.

Повний текст джерела

Анотація:

Based on the conception of dynamic shape function, a finite dynamic element method (DEM) is developed for the computation of dynamic consolidation. Formulae of the DEM are also derived. This method overcomes the shortcomings of conventional finite element methods, i.e., the vibration characteristics of the soil to be consolidated cannot be considered. Therefore, it practically reflects the dynamic characteristics of consolidation. The programs for the DEM are also written. Results of practical calculation show that the method is correct and feasible.

Стилі APA, Harvard, Vancouver, ISO та ін.

Zhang, Xiao, Zhi Ding, Shao-Heng He, Gui-Di Zhang, Miao-Miao Sun, and Tang-Dai Xia. "An Experimental Study on the Microstructure Evolution of Soil under Lateral Consolidation Compression." Applied Sciences 12, no. 16 (August 20, 2022): 8331. http://dx.doi.org/10.3390/app12168331.

Повний текст джерела

Анотація:

Based on the lateral consolidation compression experiment of remolded soil simulating the effects of pile driving and soil squeezing, in this paper, the microstructures of soil with different degrees of lateral consolidation were investigated by a scanning electron microscope. Combined with Image-Pro Plus software to process data, parameters such as the equivalent diameter, porosity, circularity, directional frequency and fractal dimension of the soil microstructure were analyzed. The results demonstrate that the microstructure of the soil sample before consolidation was debris, aggregated particles and irregular flake aggregates. Following consolidation, the microstructure became a closed flake structure, where an obvious agglomeration phenomenon occurred. During the process of lateral consolidation compression, the large pore structure was more likely to be compressed and damaged, resulting in a decrease in the equivalent pore diameter and plane porosity, the approaching of circularity towards unity and an increase in the compaction and homogenization of soil with obvious directionality. Soil particles moved continuously under the action of consolidation compression to adjust the microstructure, and the fractal dimension gradually increased. Then, as consolidation compression continued, it gradually developed to a new equilibrium state, where the fractal dimension began to decrease and approach stability.

Стилі APA, Harvard, Vancouver, ISO та ін.

Soares, Delfim. "An uncoupled numerical approach for soil consolidation analysis." Computers and Geotechnics 111 (July 2019): 255–60. http://dx.doi.org/10.1016/j.compgeo.2019.03.023.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Baqersad, Mohamadtaqi, Abbas Eslami Haghighat, Mohammadali Rowshanzamir, and Hamid Mortazavi Bak. "Comparison of Coupled and Uncoupled Consolidation Equations Using Finite Element Method in Plane-Strain Condition." Civil Engineering Journal 2, no. 8 (August 30, 2016): 375–88. http://dx.doi.org/10.28991/cej-2016-00000042.

Повний текст джерела

Анотація:

In the current paper, the consolidation settlement of a strip footing over a finite layer of saturated soil has been studied using the finite element method. In Biot’s coupled consolidation equations, the soil deformation and excess pore pressure are determined simultaneously in every time step which refers to the hydro-mechanical coupling. By considering a constant total stress throughout the time and by assuming that volume strain is a function of isotropic effective stress, uncoupled consolidation equations can be obtained using coupled consolidation equations. In these uncoupled equations, excess pore pressure and deformation are determined separately. In this approach, the excess pore pressure can be identified in the first stage. Using the calculated excess pore pressure, the soil deformation is determined through effective stress-strain analyses. A computer code was developed based on coupled and uncoupled equations that are capable of performing consolidation analyses. To verify the accuracy of these analyses, the obtained results have been compared with the precise solution of Terzaghi’s one-dimensional consolidation theory. The capability of these two approaches in estimation of pore water pressure and settlement and to show Mandel-Crayer’s effect in soil consolidation is discussed. Then, the necessity of utilizing coupled analyses for evaluating soil consolidation analysis was investigated by comparing the coupled and uncoupled analyses results.

Стилі APA, Harvard, Vancouver, ISO та ін.

Більше джерел

Дисертації з теми "Soil consolidation Computer programs"

Al-Karni, Awad 1962. "Application of the BFGS quasi-Newton method to slope stability analysis." Thesis, The University of Arizona, 1989. http://hdl.handle.net/10150/276994.

Повний текст джерела

Анотація:

Mana computer programs have been developed for solving slope stability problems. Since slope stability problems can be characterized as optimization problems, many optimization techniques can be used for searching for the lowest safety factor for a given problem and the corresponding critical slip surface. Most of the slope stability programs use the direct search method which requires only the function value (i.e., safety factor value). In this thesis, a new optimization technique, the Broyden (1970), Fletcher (1970), Goldfarb (1970), and Shanno (1970) (BFGS) quasi-Newton optimization method, is used in conjunction with the STABR program of Lefebvre (1971) to solve slope stability problems. This method of optimization requires the function value and the first derivative value, which can be found by the finite difference method. A new program CSLIP3, incorporating the BFGS technique, is used to solve a variety of realistic slope stability problems. It is determined that CSLIP3 is reliable and efficient.

Стилі APA, Harvard, Vancouver, ISO та ін.

Fernandez, Carlos Javier. "Pile-structure interaction in GTSTRUDL." Thesis, Georgia Institute of Technology, 1990. http://hdl.handle.net/1853/21418.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Soliday, Stanley Jr. "Limits of limit equilibrium and finite element techniques applied to cracked debris dams on collapsing foundations." PDXScholar, 1991. https://pdxscholar.library.pdx.edu/open_access_etds/4428.

Повний текст джерела

Анотація:

Limits of slope stability, limit equilibrium methods, and of the finite element code FEADAM are reached in the application of these methods to the problem of cracked dams constructed on collapsing soils.

Стилі APA, Harvard, Vancouver, ISO та ін.

Weih, Robert C. "Evaluating methods for characterizing slope conditions within polygons." Diss., This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-06062008-171008/.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Chan, Andrew Hin-Cheong. "A unified finite element solution to static and dynamic problems of geomechanics." Thesis, Swansea University, 1988. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.624605.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Al-Mefleh, Naji K. "Impact of land cover and antecedent moisture content on runoff discharge in the West Fork of the upper White River, Indiana." Virtual Press, 2003. http://liblink.bsu.edu/uhtbin/catkey/1285410.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Pearcy, Charles M. "The impact of background resolution on Target Acquisitions Weapons Software (TAWS) sensor performance." Thesis, Monterey, California. Naval Postgraduate School, 2005. http://hdl.handle.net/10945/2232.

Повний текст джерела

Анотація:

Approved for public release, distribution is unlimited
This study evaluated the sensitivity of TAWS detection range calculations to the spatial resolution of scenario backgrounds. Sixteen independent sites were analyzed to determine TAWS background. Multispectral satellite data were processed to different spatial resolutions from 1m to 8km. The resultant imagery was further processed to determine TAWS background type. The TAWS background type was refined to include soil moisture characteristics. Soil moisture analyses were obtained using in situ measurements, the Air Force's Agricultural-Meteorological (AGRMET) model and the Army's Fast All-seasons Soil Strength (FASST) model. The analyzed imagery was compared to the current default 1o latitude by 1o of longitude database in TAWS. The use of the current default TAWS background database was shown to result in TAWS ranges differing from the 1m standard range by 18-23%. The uncertainty was reduced to 5% when background resolution was improved to 8km in rural areas. By contrast, in urban regions the uncertainty was reduced to 14% when spatial resolution was reduced to 30m. These results suggest that the rural and urban designations are important to the definition of a background database.
First Lieutenant, United States Air Force

Стилі APA, Harvard, Vancouver, ISO та ін.

Tang, Tsung-Hui, and 唐宗輝. "Studies of Freeways Soil Anchor Performance and Appropriate Numerical Simulation Computer Programs." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/88316069762710080734.

Повний текст джерела

Анотація:

碩士
國立宜蘭大學
土木工程學系碩士班
103
In order to response geology variation in hilly areas and climate changing in Taiwan, the construction of the highways use a lot of anchors to reduce mass excavation and to increase the degree of slope stability, so that highway projects can be carried out safely and smoothly. Therefore, the relevant agents organize and assemble a database for ground anchor system, including head appearance, head component, endoscopic visual inspection and lift-off test. This study documents the anchor database system and the statistical analysis for test data of anchors. Finally, this study employs three most commonly used geotechnical engineering slope stability programs in Taiwan, namely PLAXIS, SLOPE/W and STABL, to discuss the stability of freeway slope and the anchor pre-stressed attenuation. This study explains the application, basic operation, analysis methodology, and calculation procedure for PLAXIS finite element method as well as SLOPE/W and STABL limit equilibrium methods. Finally, utilizing the information obtained through the great number of anchor information and the value distribution of anchor lift-off test, PLAXIS, SLOPE/W and STABL for four highway anchor-slope stability analysis are performed. Through the study of how to analyze the stability principles and pre-stressed attenuation behavior for anchor, it is hoped to understand the relationship between the anchor pre-stress attenuation and the safety factor of study anchor-slope. It is also discussed about which software is more suitable and precisely among the three sets of software. PLAXIS finite element method provides higher safety factor from the analysis result of the four anchor-slopes. SLOPE/W and STABL are both limit equilibrium methods and provide almost the same analysis results. The predicted result obtained from limit equilibrium method is a little more conservative. However, is is suggested that the three computer programs can be used to analyze slope stability and give quite close predicted results.

Стилі APA, Harvard, Vancouver, ISO та ін.

Ghebreab, Tesfalidet Alem. "Modelling the soil water balance and applications using a decision support system (DSSAT v3.5)." 2003. http://hdl.handle.net/10413/3579.

Повний текст джерела

Анотація:

Water is a scarce resource used by various stakeholders. Agriculture is one of the users of this resource especially for growing plants. Plants need to take up carbon dioxide to prepare their own food. For this purpose plants have stomatal openings. These same openings are used for transpiration. Quantifying transpiration is important for efficient water resource management and crop production because it is closely related to dry matter production. Transpiration could be measured using a number of methods or calculated indirectly through quantification of the soil water balance components using environmental instruments. The use of models such as the Decision Support System for Agrotechnology Transfer (DSSAT v3.5) is, however, much easier than environmental instruments. Nowadays, with increased capabilities of computers, the use of crop simulation modelling has become a common practice for various applications. But it is important that models, such as DSSAT v3.5, be calibrated and verified before being used for various applications such as long-term risk assessment, evaluation of cultural practices and other applications. In this study the model inputs have been collected first Then the model was calibrated and verified. Next sensitivitY analysis was carried to observe the model behavior to changes in inputs. Finally the model has been applied for long-term risk assessment and evaluation of cultural practices. In this study, the data collected formed the basis forthe minimum dataset needed for running the DSSAT v3.5 model. In addition, the factory given transmission of shading material over a tomato crop was compared to actual measurements. Missing weather data (solar irradiance, minimum and maximum air temperature and rainfall) were completed after checking that it was homogeneous to measurements from nearby automatic weather station. It was found that factory-given transmission value of 0.7 of the shade cloth was different from the actual one of 0.765. So this value was used for conversion of solar irradiance measured outside the shade cloth to solar irradiance inside the shade cloth. Conventional laboratory procedures were used for the analysis of soil physical and chemical properties. Soil water content limits were determined using texture and bulk density regression based equations. Other model inputs were calculated using the DSSAT model. Crop management inputs were also documented for creation of the experimental details file. The DSSATv3.5 soil water balance model was calibrated for soil, plant and weather conditions at Ukulinga by modifying some of its inputs and then simulations of the soil water balance components were evaluated against actual measurements. For this purpose half of the data available was used for calibration and the other half for verification. Model simulations of soil water content (150 to 300 mm and 450 to 600 mm) improved significantly after calibration. In addition, simulations of leaf area index (LA!) were satisfactory. Simulated evapotranspiration (E1) had certain deviations from the measured ET because the latter calculated ET by multiplying the potential ET with constant crop multiplier so-called the crop coefficient. Sensitivity analysis and long-term risk assessments for yield, runoff and drainage and other model outputs were carried out for soil, plant and weather conditions at Ukulinga. For this purpose, some of the input parameters were varied individually to determine the effect on seven model output parameters. In addition, long-term weather data was used to simulate yield, biomass at harvest, runoff and drainage for various initial soil water content values. The sensitivity analysis gave results that conform to the current understanding of the soil-plant atmosphere system. The long-term assessment showed that it is risky to grow tomatoes during the winter season at Ukulinga irrespective of the initial soil water content unless certain measures are taken such as the use of mulching to protect the plants from frost. The CROPGRO-Soya bean model was used to evaluate the soil water balance and gro'W1:h routines for soil, plant and weather conditions at Cedara. In addition, cultural practices such as row spacing, seeding rate and cultivars were also evaluated using longterm weather data. Simulations of soil water content were unsatisfactory even after calibration of some of the model parameters. Other model parameters such as LAI, yield and flowering date had satisfactory agreement with observed values. Results from this study suggest that the model is sensitive to weather and cultural practices such as seeding rates, row spacing and cultivar maturity groups. The general use of decision support systems is limited by various factors. Some of the factors are: unclear definition of clients/end users; no end user input prior to or during the development of the DSS; DSS does not solve the problems that the client is experiencing; DSS do not match their decision-making style; producers see no reason to change the current management practices; DSS does not provide benefit over current decision-making system; limited computer ownership amongst producers; lack of field testing; producers do not trust the output due to the lack of understanding of the underlying theories of the models utilized; cannot access the necessary data inputs; lack of technical support; lack of training in the development ofDSS software; marketing and support constraints; institutional resistances; short shelf-life of DSS software; technical constraints, user constraints and other constraints. For successful use of DSS, the abovementioned constraints have to be solved before their useful impacts on farming systems could be realized. This study has shown that the DSSAT v3.5 model simulations of the soil water balance components such as evapotranspiration and soil water content were unsatisfactory while simulations of plant parameters such as leaf area index, yield and phonological stages were simulate to a satisfactory standard. Sensitivity analysis gave results that conform to the current understanding of the soil-plant -atmosphere system. Model outputs such as yield and phonological stages were found to sensitive to weather and cultural practices such as seeding rates, row spacing and cultivar maturity groups. It ha been further investigated that the model could be used for risk assessment in various crop management practices and evaluation of cultural practices. However, before farmers can use DSSAT v3.5, several constraints have to be solved.
Thesis (M.Sc.)-University of Natal, Pietermaritzburg, 2003.

Стилі APA, Harvard, Vancouver, ISO та ін.

Kirkby, S. D. (Stephen Denis). "Managing dryland salinisation with an integrated expert system/geographic information system / S.D. Kirkby." 1994. http://hdl.handle.net/2440/21517.

Повний текст джерела

Анотація:

Bibliography: leaves 119-218.
xiv, 218 leaves : ill. (some col.), maps (some col.) ; 30 cm.
Title page, contents and abstract only. The complete thesis in print form is available from the University Library.
Salt Manager represents the software system developed by this thesis to implement an interactive land classification methodology. An Expert System (ES), a Geographic Information System (GIS), remotely sensed information and a relational database management system (RDBMS) have been utilised to construct the methodology.
Thesis (Ph.D.)--University of Adelaide, Dept. of Geography, 1995

Стилі APA, Harvard, Vancouver, ISO та ін.

Книги з теми "Soil consolidation Computer programs"

Gavlick, Stephen N. Geotechnical Branch computer programs: CON1D, CON1DP, and CONPLOT : consolidation, expansion, or uplift tests for standard one-dimensional consolidation test data. Denver, Colo: Geotechnical Branch, Division of Research and Laboratory Services, Engineering and Research Center, U.S. Dept. of the Interior, Bureau of Reclamation, 1987.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Peter, Jones. Implementing SAP business planning and consolidation. 2nd ed. Bonn: Galileo Press, 2015.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Starr, G. Lynn. Soil bulk density and soil moisture calculated with a FORTRAN 77 program. Portland, Or: U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1988.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Hazard, John W. Processing data from soil assessment surveys with the computer program SOILS. [Portland, Or.]: U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, 1985.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Thomas, A. W. Computer program for stochastic utilization of the USLE. Watkinsville, GA: Southern Piedmont Conservation Research Center, Agricultural Research Service, USDA, 1989.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Wilson, Joe. Evaluation of the GEOWEB and J.K. STRUCTURE slope stabilization methods. Madison, WI: The Unit, 2000.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Verburg, Kirsten. SWIMv2.1 user manual. [Australia]: CSIRO Australia, Division of Soils, 1996.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Solutions for soil and structural systems using Excel and VBA programs. Hoboken, NJ: Wiley, 2012.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Christian, John T. Productivity tools for geotechnical engineers. Newton, Mass: Magellan, 1996.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Carlson, E. J. Drainage from sloping land using oblique drains. Denver, Colo: Hydraulics Branch, Division of Research and Laboratory Services, Engineering and Research Center, U.S. Dept. of the Interior, Bureau of Reclamation, 1987.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Більше джерел

Частини книг з теми "Soil consolidation Computer programs"

Suarez, Donald L. "Carbonate Chemistry in Computer Programs and Application to Soil Chemistry." In SSSA Special Publications, 53–73. Madison, WI, USA: Soil Science Society of America and American Society of Agronomy, 2015. http://dx.doi.org/10.2136/sssaspecpub42.c4.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

de la Rosa, D. "Microleis 3.2: A Set of Computer Programs, Statistical Models and Expert Systems for Land Evaluation." In Soil Responses to Climate Change, 205–9. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-79218-2_16.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Zhou, W., X. Li, and C. Hong. "Analytical study on the consolidation of soft soil under vacuum preloading combined with fill surcharge." In Computer Methods and Recent Advances in Geomechanics, 1179–83. CRC Press, 2014. http://dx.doi.org/10.1201/b17435-206.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Teng, Feng. "A New Era of Applying CALL to Enhance EFL Learners' Lexical Knowledge." In Computer-Assisted Language Learning, 2179–94. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-7663-1.ch104.

Повний текст джерела

Анотація:

This chapter provides an overview of several software programs, which can used to teach and acquire lexical knowledge. First, GSL Builder is aimed directly at supporting the acquisition of high frequency words. AWL Builder is generally used to develop knowledge of academic words. Shanbei provides opportunities for learning low-frequency words. Word Engine is specifically for learning the words needed for passing the TOEFL, IELTS, TOEIC, SAT, and GRE tests. CAVOCA takes learners through different stages of vocabulary development: deduction, consolidation, and long-term retention. V-admin enables teachers to keep track of their students' vocabulary development. The integration of these tools can facilitate EFL learners' vocabulary learning. Teacher beliefs concerning the role of technology for teaching vocabulary are important. Teachers should explore how to effectively integrate vocabulary building technology into their teaching practice. In the future, more effort needs to be made to creating a clearer conceptualization of computer-assisted vocabulary learning (CAVL).

Стилі APA, Harvard, Vancouver, ISO та ін.

Pathak, Sonal Sareen, and Sandhya Batalia. "Sustainable Watershed Management." In Handbook of Research on Green Technologies for Sustainable Management of Agricultural Resources, 188–99. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-7998-8434-7.ch012.

Повний текст джерела

Анотація:

In the present scenario, adequate water supply for agriculture, inland transportation, public health services, power production, and other industries is a subject of concern. The proper watershed management structure is essential to achieve sustainable land and water resource management and for eradication of rural poverty. Thus, a watershed management plan will achieve both socio-economic and ecological goals for sustainable water management. The integrated watershed management plan includes application of cost-effective soil water nutrient management practices. The chapter focuses on the watershed management system, its types and multidisciplinary approaches, and the impact of watershed management programs in improving economy and crop productivity. Thus, watershed serves as an important unit for the management of interdependent natural resources like water, land, and vegetation. However, in the future, the inevitable integration of information and computer technology into environmental technologies is promising solutions for the advanced management of water resources.

Стилі APA, Harvard, Vancouver, ISO та ін.

Тези доповідей конференцій з теми "Soil consolidation Computer programs"

Gonzalo, García Ros, Sánchez Pérez Juan Francisco, Fernández García Martina, and Del Cerro Velázquez Francisco. "Teaching and learning experience in soil consolidation aided by computer software." In Fourth International Conference on Higher Education Advances. Valencia: Universitat Politècnica València, 2018. http://dx.doi.org/10.4995/head18.2018.8070.

Повний текст джерела

Анотація:

The present article shows how the learning and personal motivation of the students in Geotechnics are improved through the realization of computer practices and thanks to the use of a software adapted to their needs. By means of a simple interface of data entry and output of results, students will master abstract concepts such as the excess pore pressure and the average degree of consolidation, while reinforcing their personal motivation, both to face the content of the subject and those of other disciplines of the Civil Engineering Degree.

Стилі APA, Harvard, Vancouver, ISO та ін.

Xiaoyong, Li, and Zhang Hui. "Monte Carlo analysis of probability of one-dimensional consolidation in saturated clay soil ground." In 2010 International Conference on Computer and Information Application (ICCIA). IEEE, 2010. http://dx.doi.org/10.1109/iccia.2010.6141605.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Geng, Xueyu. "Non-linear Consolidation of Soil with Vertical and Horizontal Drainage under Time-Dependent Loading." In 2008 International Conference on Advanced Computer Theory and Engineering (ICACTE). IEEE, 2008. http://dx.doi.org/10.1109/icacte.2008.216.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Xu, Jim, Carl Costantino, Charles Hofmayer, and Herman Graves. "Finite Element Models for Computing Seismic Induced Soil Pressures on Deeply Embedded NPP Structures." In ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/pvp2006-icpvt-11-93724.

Повний текст джерела

Анотація:

This paper discusses computations of seismic induced soil pressures using finite element (FE) models for deeply embedded and/or buried (DEB) stiff structures, such as those appearing in the conceptual designs of structures for advanced reactors. For DEB structures, the soil-structure interaction (SSI) effect is expected to have a strong influence on the estimate of the seismic induced soil pressures, especially for stiff structures embedded in soft soil strata. In this paper, two FE models are developed using the SASSI and LS-DYNA computer programs, representing respectively the substructure subtracting method and explicit FE algorithm. SASSI utilizes the wave propagation theory and the principle of superposition to treat the SSI phenomenon. In the LS-DYNA analysis, an attempt is made to apply the direct approach to the SSI effect, which treats the near field soil with an explicit FE mesh that is connected to a transmitting boundary to approximate wave propagation in the half-space. The structural model used for the study is derived from the characteristics of a conceptual design for an advanced reactor. The structure is founded in a soft soil overburden underlain by a rock and the input seismic motion is specified at rock outcrop and has a zero period acceleration (ZPA) equal to 0.3 g, typical of review level earthquakes for nuclear power plant structures in the Central and Eastern United States. Various depths of burial (DOB) for the structure are considered in the analysis to afford an assessment of the DOB effect on the seismic induced soil pressure estimates determined by these methods. Comparisons and discussions of the analysis results computed by the two approaches are provided.

Стилі APA, Harvard, Vancouver, ISO та ін.

Garcia Vargas, Joel A., and Antonio Ruvalcaba Gonza´lez. "Probabilistic Estimation in Soil Dynamic Properties to Obtain Response Spectra at Campeche Bay." In ASME 2003 22nd International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2003. http://dx.doi.org/10.1115/omae2003-37259.

Повний текст джерела

Анотація:

In the present study, response spectra for seismic design in the Bay of Campeche for offshore platforms, using probabilistic models in soil dynamic properties (shear modulus “G”, normalized shear modulus “G/Gmax” and damping ratio “D”), to evaluate their influence in the response of the site of interest, are presented. In this study the probabilistic model of the soil, take into account the uncertainty in soil dynamic properties, due to the fact that the soil dynamic properties play an important role on the interpretation of free-field motion. In this work an explicit form of the seismic wave characteristics were supposed and their likely source-site propagation characteristics were performed with two computer programs. In order to obtain seismic design parameters, three types of seismic event records were associated to the soil properties at the site of interest, taking into account local effect conditions. Geothechnical, seimologycal, tectonical and geological information, similar to the area of interest, were used. The maximum acceleration on the surface, the soil dominant period of vibration, the duration and the frequency content due to a dynamic excitation applied in the rigid base of the soil column were considered. We assumed that each one of the three types of earthquakes are representative of strong motions that might be potentially affecting the Bay of Campeche. In the study thirty-one sampling in several sites located at the Bay of Campeche were used as well as field and laboratory tests. The dynamic properties were determined in each test type by different ranges according to their shearing strain. From these results test, we know the G and D variation law in the range of interest. In the same way, the uncertainty level influence of the soil dynamic properties was modeled with the expected value of the soil dynamic properties. Six different sets including the soil modulus plus/minus a standard deviation, coefficient from the dynamic properties-time variant evaluations, for each one of the shearing strain, which are contained between 10−4 a 10, were considered. Expected site response spectra for different recurrence periods, may be used to complement available information in order to update the present seismic design spectra for offshore facilities located in this area.

Стилі APA, Harvard, Vancouver, ISO та ін.

Nakaki, David K., Philip S. Hashimoto, James J. Johnson, Yahya Bayraktarli, and Olivier Zuchuat. "Probabilistic Seismic Soil Structure Interaction Analysis of the Mu¨hleberg Nuclear Power Plant Reactor and SUSAN Buildings." In ASME 2010 Pressure Vessels and Piping Division/K-PVP Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/pvp2010-25343.

Повний текст джерела

Анотація:

Probabilistic seismic soil-structure interaction (SSI) analysis was performed for the Mu¨hleberg Nuclear Power Plant Reactor and SUSAN Buildings in support of the seismic probabilistic saftety assessment of the plant. An efficient hybrid method, employing computer programs SASSI2000 and CLASSI presented in a companion paper, was used in this analysis. The method takes advantage of the capability of SASSI2000 to analyze embedded structures with irregular geometry and the computational efficiency of CLASSI to rapidly perform the SSI response analysis of large structure models. Fixed base finite element models of the buildings were first developed from which the structure geometry, nodal masses, natural frequencies, and mode shapes were extracted. The structure embedments were modeled using SASSI2000. Impedance functions and scattering vectors were calculated by imposing rigid body constraints to the embedded foundation. The fixed base structure dynamic properties and the foundation impedances and scattering functions were input to CLASSI to perform the response analysis. The probabilistic analysis was performed following the Latin Hypercube Simulation (LHS) approach documented in NUREG/CR-2015. Variables defined by probability distributions were sampled according to a stratified sampling approach. The combination of the parameters for each simulation was determined by Latin Hypercube experimental design. Variables in the LHS included the earthquake ground acceleration time histories, structure stiffness and damping, and soil stiffness and damping. Thirty response simulations were performed using CLASSI in which the variable values were randomly selected. The use of CLASSI has the advantage that the response analysis simulations can be executed in a fraction of the time that would be required with SASSI2000 alone. For each simulation, in-structure response spectra (ISRS) were calculated at selected locations in the buildings. Probabilistic distributions, described by the median and 84th percentile response spectra, were calculated from the thirty simulations. The probabilistic ISRS are subsequently used in the seismic fragility evaluations of selected essential equipment.

Стилі APA, Harvard, Vancouver, ISO та ін.

Jensen, Gullik A., and Thor I. Fossen. "Mathematical Models for Model-Based Control in Offshore Pipelay Operations." In ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2009. http://dx.doi.org/10.1115/omae2009-79372.

Повний текст джерела

Анотація:

This paper considers mathematical models for model-based controller design in offshore pipelay operations. Three classes of models for control design are discussed, real-world models suitable for controller design verification, controller and observer models which are used on-line in the control system implementation. The control application place requirements on the model with respect to the computational time, dynamic behavior, stability and accuracy. Models such as the beam model, two catenary models, as well as general finite element (FE) models obtained from computer programs were not able to meet all of the requirements, and two recent dynamic models designed for control are presented, which bridge the gap between the simple analytical and more complex FE models. For completeness, modeling of the pipelay vessel, stinger and roller interaction, soil and seabed interaction and environmental loads are discussed.

Стилі APA, Harvard, Vancouver, ISO та ін.

Xu, J., C. Miller, C. Hofmayer, and H. Graves. "An Assessment of Simplified vs. Detailed Methodologies for SSI Analyses of Deeply Embedded Structures." In ASME/JSME 2004 Pressure Vessels and Piping Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/pvp2004-2906.

Повний текст джерела

Анотація:

Sponsored by the US Nuclear Regulatory Commission (NRC), Brookhaven National Laboratory (BNL) is carrying out a research program to develop a technical basis to support the safety evaluation of deeply embedded and/or buried (DEB) structures as proposed for advanced reactor designs. In this program, the methods and computer programs established for the assessment of soil-structure interaction (SSI) effects for the current generation of light water reactors are evaluated to determine their applicability and adequacy in capturing the seismic behavior of DEB structures. This paper presents an assessment of the simplified vs. detailed methodologies for seismic analyses of DEB structures. In this assessment, a lump-mass beam model is used for the simplified approach and a finite element representation is employed for the detailed method. A typical containment structure embedded in a soil profile representative of a typical nuclear power plant site was utilized, considering various embedment depths from shallow to full burial. BNL used the CARES program for the simplified model and the SASSI2000 program for the detailed analyses. The calculated response spectra at the key locations of the DEB structure are used for the performance assessment of the applied methods for different depths of burial. Included in the paper are: 1) the description of both the simplified and detailed models for the SSI analyses of the DEB structure, 2) the comparison of the analysis results for the different depths of burial between the two methods, and 3) the performance assessment of the analysis methodologies for SSI analyses of DEB structures. The resulting assessment from this study has indicated that simplified methods may be capable of capturing the seismic response for much deeper embedded structures than would be normally allowed by the standard practice.

Стилі APA, Harvard, Vancouver, ISO та ін.

Song, Ming, Ekaterina Kim, Jørgen Amdahl, Marilena Greco, and Mhamed Souli. "Numerical Investigation of Fluid-Ice-Structure Interaction During Collision by an Arbitrary Lagrangian Eulerian Method." In ASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/omae2016-54608.

Повний текст джерела

Анотація:

When ice floes collide against marine structures, pronounced hydrodynamic loads are induced by the water-ice-structure interaction. With today’s highly competitive structural design market, it is nearly impossible to ignore the advances that have been made in the computer analysis of fluid-structure interaction (FSI) problems. FSI methods can provide accurate representation of hydrodynamic effects. A number of commercial programs have been developed, and their applications in structural design increases rapidly. For instance, Arbitrary Lagrangian-Eulerian (ALE) formulations have been used to solve underwater explosions problems in ocean engineering, and soil-structure interaction problems in civil engineering. Application to fluid-ice-structure interaction problems is more recent and growing. This paper represents a contribution in assessing the capabilities of the ALE formulation for fluid-ice-structure collision problems. The ALE and coupling algorithms have been successfully validated through the comparison against model tests of an ice-structure collision. The work also examines the numerical convergence and the sensitivity of the results to the theoretical modelling used. From the sensitivity study it is concluded that the effect of viscosity and equation of state for the water model within the ALE formulation are insignificant, whereas the choice of the element size has a noticeable effect on the computed contact forces and the motions of the impacted structure.

Стилі APA, Harvard, Vancouver, ISO та ін.

Grant, Peter, Jeffrey S. Freeman, Rob Vail, and Frank Huck. "Preparation of a Virtual Proving Ground for Construction Equipment Simulation." In ASME 1998 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1998. http://dx.doi.org/10.1115/detc98/dac-5614.

Повний текст джерела

Анотація:

Abstract A multi-phased evaluation of the Iowa Driving Simulator as a virtual proving ground for construction equipment simulation is presented. In Phase I the Iowa Driving Simulator was evaluated in an “open-loop” mode to assess its capability to simulate a typical maneuver common to wheel loader operation, and its viability as a test platform for human subject evaluation of those maneuvers. A typical wheel loader truck loading cycle involves numerous directional shifts. Cycle productivity is increased if these shifts are executed at full engine throttle. Jerk and acceleration levels associated with full throttle shifts, however, can cause both operator discomfort and spillage of loaded material. Electronically controlled transmissions have the potential to both minimize directional shift times and material loss while optimizing operator comfort. This optimization will require an understanding of the factors which affect operator comfort during shifts. A study was therefore devised to determine those aspects of the motion generated by a directional shift which affect operator comfort. The Iowa Driving Simulator motion system was used to present operators with a series of acceleration time histories which are representative of various shift strategies. The operators rated the relative comfort of each strategy during paired comparison tests. Limitations of the simulator motion system prevented definitive results from being drawn; however, results did confirm shift comfort criteria previously established by the machine manufacturer. Success of the Phase I effort was sufficient to warrant a more in-depth study. In Phase II a complete VPG environment for wheel loader operation on the IDS was developed and qualitatively evaluated. This VPG environment included a visual model of a mine pit, developed for Caterpillar, Inc. by engineers at its National Center for Supercomputing Applications office, combined with the immersive motion capability of the Iowa Driving Simulator. A real-time dynamics model of a generic wheel loader along with a menu driven interface to the data set used to simulate a particular wheel loader were developed at Center for Computer Aided Design. This combination of programs allows changes to the design of a loader to be rapidly evaluated within a virtual proving ground environment or off-line at an engineering workstation. The machine model was then combined with an implement/soil interaction model, also developed at Caterpillar’s National Center for Supercomputing Applications office. The resulting machine model can be evaluated either off-line at a workstation or driven in response to operator input within the Iowa Driving Simulator virtual proving ground environment. A comparison of the offline model’s predictions of machine response to swept-sinewave steering input is shown to compare favorably with measured performance of the actual machine.

Стилі APA, Harvard, Vancouver, ISO та ін.

Ми пропонуємо знижки на всі преміум-плани для авторів, чиї праці увійшли до тематичних добірок літератури. Зв'яжіться з нами, щоб отримати унікальний промокод!