Papers by Keyword: System Optimization

Abstract: This study presents a hybrid CFD-ML model for liquid filtration systems, overcoming limitations of traditional approaches. The model accurately predicts pressure drop (2.3% RMSE) and filtration rates, outperforming standard CFD (8.7%) and Darcy models (12.4%). By integrating the Kozeny-Carman equation with an ML-enhanced k-ϵ turbulence model, it achieves 65% faster computations (12 vs. 34 minutes). Validations using nanofiber membranes show high accuracy (3.1–4.8% error, R² = 0.95–0.97). Applications in water treatment and oil refining yield 12% energy savings in reverse osmosis and 15% efficiency gains in oil-water separation at optimal porosity (0.80) and velocity (0.08 m/s). Sensitivity analyses reveal porosity and velocity as critical parameters, with a 10% porosity increase reducing pressure drop by 8 kPa. While the model advances filtration technology by capturing turbulence and adapting to diverse materials, it neglects fouling dynamics and assumes Newtonian behavior. Future work should address multiphase flows, dynamic fouling, and alternative characterization methods to broaden industrial use in sustainable processes like water purification and biotechnology. The framework offers actionable insights for designing efficient, cost-effective filtration systems with real-time control potential.

Abstract: This paper extends a previously presented SiC power module design philosophy to critical, higher-level components for increased system performance, namely the DC bussing and DC link capacitor design. The DC bussing is essential to connect the DC bulk capacitors to the high-speed power modules and it is imperative that low inductance is maintained while current carrying capability and temperature be maintained. Often, high frequency capacitors are added to systems to increase performance by compensating for extra stray inductance that the DC bussing can introduce. However, issues that may arise by doing such are presented and it is shown that the best solution is to optimize the DC bus structure rather than compensate for a poor design. Finally, the implemented bussing is shown and full power system results presented for the inverter stack-up design.

Abstract: This paper analyzes the optimizing distribution problems between the by-product gas in gas tank and self-contained boiler in electric power plant in the iron and steel plant. We discuss factors which have effect on operating costs, such as the control of gas tank position, the change of fuel load of self-contained boiler in electric power plant, price change of outsourcing fuels and so on. We set corresponding penalty function in iron and steel company as well as establish the optimizing mathematical model in gas supply system according to these questions. It can be known through solving the model that the gap of gas supply and consumption can be solved by optimizing distribution between gas tank and self-contained boiler in electric power plant. After that, reducing the consumption of purchased fuels amount and the frequent changes of fuels load in boiler, improving the efficiency of power generation, achieving zero-emission, making the gas supply system operates securely, economically and stably can realize.

Abstract: This article gathers 16 factors which influence the duration of public construction project on the basis of research and analysis, and forms hierarchical relationships and causal relationships of the factors through improved interpretive structural model. Finally, comes up with several recommendations on the issue, further，the research and discussion on public construction project control and optimization of construction duration of our country are carried out.

Abstract: Virtual Reality combines multiple computer technology and information technology branch, to create a simulation of the real space provided strong support for an image of human-computer interaction techniques. VR calculated by computer simulation of various lights, sound and sensor devices allow users to feel immersive, real-time perception and conduct a natural interaction. This thesis is mainly based on virtual reality technology Virtual Campus Roaming System optimization algorithm for practical engineering application of virtual reality technology to provide a basis.

Abstract: Starting with some general and historical perspective, mechatronics is placed in the technological field map as a multidisciplinary discipline. The considered advantages of mechatronic systems are exposed from the human perspective, which enables the consideration of the social impact of this technological discipline. Due to the multidisciplinary character of mechatronics, the integration issues including synergetic effects consider both geometrical and functional aspects. The same reason provides a very large variety of different solutions to fulfill a certain functionality. Choosing an appropriate solution for a specific application is done using systematic methods which shape this problem to an optimization problem. General statements are illustrated with different application examples.

Abstract: Henan Oilfield Xiaermen Qianbei block is the medium-deep heavy oil reservoir. Due to the high viscosity of crude oil, formation cementation loose, sand production and reservoir water-sensitive, the pre-trial is less effective. The problem is the inefficiency of steam injection, poor oil-steam ratio, sand production serious, the poor pump efficiency and the abnormal productions. It is important to improve the mobility of heavy oil in the formation and wellbore for the development. According to the reservoir characteristics and the experience of the primary development, the measures which include the high-pressure gravel packing sand control, insulated tubing of steam injection, anti-swelling agent reservoir protection, formation and wellbore viscosity reducer and rod sucker-rod pumping system are carried out in a pilot test of the four wells. After the pilot test, the oil-steam ratio increases from 0.08 to 0.55, the average daily oil production increases from 0.5 tons to 8.0 tons. The pilot test has achieved great success and promoted the application in medium-deep heavy oil thermal recovery in the entire block, simultaneously provided the basis for the efficient development of other similar blocks.

Abstract: As the air conditioning energy consumption of the date center has increasingly become the focus of attention, reformation for the energy consumption and exploration for the suitable combination model of the air conditioning system have significance in energy saving. This paper makes a program design for the air-conditioning system of a data center in Beijing, makes an analysis of the system operation mode and uses the concept of exergy efficiency to optimize the air conditioning system in order to achieve maximum efficiency.

Abstract: In the industrial production of polyvinyl chloride (PVC), large number of loops and low self-control rate can cause a few problems, such as poor loop tuning of PID regulator parameters, poor maneuverability of automation, big device fluctuations, lots of alarms as well as the lack of stability. Thus, control procedure optimizing and PID algorithm are adopted to control the system. Firstly, operating point without automation before is to put into automation now. It aims to improve the operational stability and reach the device self-control rate to more than 95%. Then, advanced control theory is adopted to optimize the controller form and tuning PID parameters to achieve fast response, strong anti-jamming, device control stability effect.

Abstract: The tunnel project is a systems engineering problem. And it is very necessary to study on the system optimization method for supporting structure in order to promote the research about intelligent optimization of safety control for tunnel project. In this paper, the analytic hierarchy process is used to establish system model of supporting structure for urban tunnel and the SCORE function test method for non-linear drift (i.e., non-linear impact of factors) is also applied to simplify the model. This idea and method for the optimization of retaining structural system have important significance for optimization theory building of the tunnel support structure system.