أجريت عملية هضم وسيط التوتياء المستهلك في عدة حموض و أعطى حمض الكبريتيك أفضل النتائج , ثم حددت الشروط المثلى لإجراء عملية الهضم بحمض الكبريتيك حيث كان التركيز 2 مول/ليتر هو الأنسب و عند درجة 50 م و زمن الخلط 60 دقيقة, و تم ترسيب التوتياء من محلولها ف
ي حمض الكبريتيك على شكل كبريتات التوتياء بإضافة الكحول الإيتلي.
تمت نمذجة عملية استخلاص التوتياء من وسيط التوتياء المستنفذ في الصناعة, حيثوضعت نماذج رياضية جديدة, و استخدمت حسابات القيمة الوسطية التربيعية لغرض تفسير و تحليل المعطيات.اعتمادا على قيم تجريبية لاستخلاص التوتياء, و وجدت لذلك علاقات رياضية حددت معاملاتها.
حددت الشروط المثلى لعملية استخلاص التوتياء بطريقة النمذجة, و تمت مقارنتها تطبيقيا , حيث كان هناك توافق بين النتائج التجريبية و النتائج التي تم التوصل إليها بالنمذجة.
We discussed in this research improvement of the methods of computerized simulation with practical examples in the field of automation of technical processes. The work has been done on an experimental station, which has been developed specially for t
his reason. It is a multi- purpose station for training on automation of industrial processes using a data acquisition system and program for procuring data and preparing the suitable diagrams .
This paper describes a general model of photovoltaic module. It can be used in all studies and researches
that focus on photovoltaic generator. The main advantage of this model is in using the general
specification of the module which is included in the datasheet.
sapphire oscillator in order to generate a single wavelength at 780 nm.
The model offers a simple mechanism to investigate the impact of the
variations of the input parameters (maximum amplification coefficient,
pumping rate, loss coefficient, and
pumping density) on the output pulse
characteristics (delay time, pulse width, pulse build up time, duration and
peaks maxima of the Nd3+ -YAG pumping laser). Moreover, this model allows
studying the gain-switched Ti:sapphire output characteristics as being pumped
by the second harmonic wavelength (532nm).
Numerical results showed that the maxima of the output photon density,
pulse width, delay time, and pulse duration are very much dependent on the
power variations of the pumping source.
This study was carried out to compare the performance of the FAO
AquaCrop and CropWat models in simulating the effects of deficit irrigation on
cotton crop. The models were calibrated using data from the 2007 growing
season of a field study conduc
ted to assess deficit irrigation effects on cotton,
whereas the models were validated by comparing their outputs for yield and
water use (ETc) with the measured values of the two variables in the 2008 and
2009. The relationship between measured and predicted values of yield and
ETc revealed that the AquaCrop was better than CropWat in predicting water
stress impact on yield and ETc. The linear regression equation for AquaCrop
had a small intercept and its slope was very close to unity. The index of
agreement (d) was close to one for both models, except its value for ETc in the
2009 year. Both models could reproduce the general trend of the changes in soil
water content in the different irrigation levels. Accordingly, the use of
AquaCrop instead of CropWat should be encouraged for management and
planning of irrigation, since it is a practitioner type model keeps a good balance
between output accuracy and simplicity.
The quick consuming of products and the strong competition
between producers caused to increase the complexity of products, so
the digital factory became a need between design and producing
actually to achieve a production system with a shorter ti
me and
optimal design and parameters without engineering modifications.
This research offering a reference model basing on a complete
framework between the engineering applications to build a
computational model with a single core based on the integration
between three dimensions modeling and automation of application
for digital factory concept, to optimize the design of achieving the
ideal execution of actual production system. Where we achieved the
control of three-dimensional computer model according to process
automation exactly as in actual through integrating tools, where the
percentage of exact between the real factory and digital factory was
83% by using the time of process as the main factor for comparison
in this evaluation.
Machine developing aimsto improve its velocity, capability and production,this is
accompanied by increase of Mechanical side effects and the dynamical loads between the
Machines elements and parts, that may conduct to rise the Mechanical vibrations
and may
cause a lot of damage in these machines, and cause negative effects on the
environmentaround these machines, the study of Mechanical vibrations has a significant
importance for engineering and technical students, to have knowledge of Mechanical
vibrations that may arise in the machines under design process, or to study the mechanical
vibrations resulting in the machines under use to isolate these vibrations and attenuate of
its negative effects, for that we introduced an simulation program to show and illustrate a
method to simulate some mathematical models representing some of possible types of
vibrations, and to determine the most important parameters that describe the different
vibrations motions, we choose an suitable programing language to merge this simulated
models with an illustration and learning texts and drawings and animations in one
executable application, this application show the models and the results in simple and very
clear manner, and show the results in high resolution comparing with other programing
languages.
The thesis proposes a unified vision of business process lifecycle that implement different activities on the business process from defining or discovering to implementing and monitoring. In discovery phase within the unified vision it presents a mec
hanisem based on methodologies that fit the reality of the Syrian institutions. The thesis depends on a process modeling approach which scales in different levels of details and clarifies the repeated parts allowing to isolate them and define patterns from them. This patterns are used in the optimization phase whether for improving or reengineering.
The unified vision can be applied to automate non-automated institutions, it has been applied to the Directorate of Syrian Custom and its departments. In each department the business processes follow a specific flow that is considered as a
pattern which can be applied to the rest of business processes, subprocesses can be isolated and reused repeatedly whenever they’re needed.
In this research, a research and educational tool for studying the sensitivity of the vehicle's suspension system to the properties and parameters of the suspension’s components is developed. This tool is a program that can study different models cre
ated using the Matlab/Simulink software package with its various libraries. Different types of models can be analysed, such as differential equation models expressing a mathematical model, block diagrams, or state space models. The tool also enables students to identify the suspension’s components, and its basic design parameters, and choose these parameters. Researchers and students will be able to test their models in terms of response, overshoot, and sensitivity, when conducting simulations in different working conditions.
