Outflow valve of civil aircraft controls the flow out cabin by adjusting angle, and then achieves purpose controlling pressure cabin. In order to research factors affecting normal control provide reference for design system (CPCS), a digital electric CPCS model was built SIMULINK, in which acquisition delay time, outflow movement time maximum move speed are changed respectively. The change trend altitude, altitude rate, angle obtained. results show have great influence on control. When...

The safety-class (1E) digital control system (DCS) of nuclear power plant characterized structural multiple redundancies, therefore, it is important to quantitatively evaluate the reliability DCS in different degree backup loss. In this paper, a evaluation model based on T-S fuzzy fault tree (FT) proposed for 1E plant, which connection relationship between components described by gates. Specifically, an output rejection chosen as example, FT model, key indicators such probabilistic...

Nuclear safety-class DCS is used for nuclear reactor protection function, which one of the key facilities to ensure power plant safety, maintenance keep system in a high reliability significant. In this paper, developed by Power Institute China investigated, model estimation considering emergency trip control process carried out using Markov transfer process. According System-Subgroup-Module hierarchical iteration calculation, evolution curve failure probability established, and preventive...

In this paper, a PD controller which uses optical flow to obtain position and velocity feedback is proposed for the autonomous hovering flight control of nano quadrotor unmanned aerial vehicle (UAV). The UAV has mass less than 100 g comparatively much smaller micro vehicles utilized in previous research. Due limited size payload ability, wireless camera employed as onboard visual device translational UAV. Experiment results are included demonstrate good performance design.

Abstract Model‐Based Systems Design (MBSD) formalizes the application of system modeling. However, it is still difficult for designers to implement MBSD in practice. One challenges make field design more unified, as different methodologies focus on specific areas, and various from areas use ambiguous terms. Moreover, failure some products originates undiscovered couplings functions stage. Axiomatic (AD) provides a scientific foundation design. In order reduce ambiguity alleviate functional...

Process planning is a typical combinatorial optimization problem. When the scale of problem increases, explosion occurs, which makes it difficult for traditional precise algorithms to solve A hybrid particle swarm (HPSO) algorithm proposed in this paper problems process planning. hierarchical coding method including operation layer, machine layer and logic designed algorithm. Each corresponds decision sub-problem Several genetic operators are replace update formula position velocity The...

Modern computer systems for distributed service computing become highly complex and difficult to manage. A self-adaptive approach that integrates monitoring, analyzing, actuation functionalities has the potential accommodate a dynamically changing environment. The main objective of this paper is develop an architecture-based framework improve performance resource efficiency server while maintaining reliable services. target problem concurrent systems. This proposes Self-Adaptive Framework...

Background: Considerable research has been conducted on acupuncture worldwide. This study chronologically
 examined the changing features and fronts of elucidated differences among six most
 productive countries.
 Methods: Bibliographic coupling is a powerful tool for identifying field. Acupuncture-related
 publications worldwide from most countries during 1983–2012 were retrieved Science
 Citation Index Expanded Social Science Index. To form fronts, 100 highly...

According to Reliability issues with hydro-pneumatic suspension, the method of combining failure mode and effect analysis (FMEA) fault tree (FTA) is proposed for research on system reliability. By analyzing function composition stationary FMEA table given. From perspective design, gasbag crack built, improvements major weaknesses are suggested. It shown that reliability improvement methods effective in full-scale experiments. The significantly increase fixed suspension achieved.

High-frequency data improves the timeliness of movie attendance forecasts, but also results in issue seasonality. The main objective this article is to build and test a novel model that considers Based on Bass model, we combine an intertemporal demand shift pattern binary elements seasonality – weekends holidays propose called DISBM. We chose sample 58 movies released China 2013 evaluate our proposal. empirical suggest DISBM has better performance than other seasonal models. demonstrate...

As key equipment in nuclear power plant, the reactor control system is adopted to strictly and regulate of a PWR (pressurized water reactor) plant. A well-optimized predictive algorithm based on SDMC (stepped dynamic matrix controller) developed introduced this paper applied regulation model. In addition, test verification application conducted by two different methods devices: virtual platform physical DCS (digital system). The result suggests that gains better performance maximum...

In order to satisfy the requirements of power operation scene safety monitoring and lessen human accidents, a novel framework video surveillance for abnormal detection in substations based on artificial technology was presented. Firstly, multi-classes detector improved YOLOv3 proposed realize localization multiple targets. Then, types violation defect were discriminated by secondary analysis workers or equipments results. Substation system developed implement environment detection, it...

The artificial bee colony (ABC) algorithm, which has been widely studied for years, is a stochastic algorithm solving global optimization problems. Taking advantage of the information best solution, Gbest-guided (GABC) goes further by modifying solution search equation. However, coefficient in its equation based only on numerical test and not suitable all Therefore, we propose novel named ABC with gradient (GABCG) to make up weakness. Without factors, new variable gradients established....

Travel time reliability is a critical factor affecting travelers’ route choices, and standard deviation has been widely used as the quantitative measure in many routing models. However, there have concerns regarding its behavioral interpretation theoretical limitations when underlying travel distribution asymmetrical. This study proposed use of semistandard (SSD) risk under uncertain conditions demonstrates conceptual advantages over counterpart. Then, strategy was formulated that minimized...

Vehicle dynamic management (VDM) is a vehicle chassis integrated control system based on electronic stability program (ESP) and continuous damping (CDC) that has been developed in recent years. In this work, the ideal yaw angle rate sideslip of mass center are calculated deriving an monorail model with two degrees freedom. Then, direct moment proportional-integral-differential strategy for ESP proposed as foundation VDM. addition, multi-objective fuzzy (MFCDC) to achieve comfort, handling...

For a destination, there are many guide signs guiding to it. These form some paths the destination. But not all of can people their destinations successfully. This paper presents an efficient model solve accessibility optimization problem signs. The goal this is plan for optimal path each existing problematic which certain destination In model, artificial bee colony (ABC) algorithm employed as main optimizer. paper, cost planned includes two parts, length, and number deployed new obtained by...