As more and mobile applications are developed, app testing quality assurance have become very important. Due to the diversity of devices platforms, compatibility for apps has been identified as one urgent challenging issue. There two major reasons contributing this They are: a) large number with diverse features platforms which upgraded frequently, b) a higher cost complexity in testing. This paper proposes optimized strategy using statistical approach reduce test costs, improve engineer's...

The antiquated method of train dispatching relying solely on dispatchers' knowledge is unable to meet the need for rapid response and effective solutions in emergency situations. This article proposes an ACP (Artificial System, Computational Experiment, Parallel Execution) explore potential automating management high-speed railway trains. A parallel system created, comprised actual its artificial counterpart. Various computational experiments were conducted investigate effects different...

Unexpected delays in train operations can cause a cascade of negative consequences high-speed railway system. In such cases, timetables need to be rescheduled. However, timely and efficient timetable rescheduling is still challenging problem due its modeling difficulties low optimization efficiency. This paper presents Transformer-based macroscopic regulation approach which consists two stages including policy-based decision-making. Firstly, the relationship between various schedules...

Purpose The intelligent Central Traffic Control (CTC) system plays a vital role in establishing an high-speed railway (HSR) system. As the core of HSR transportation command, CTC is new dispatching command that integrates widely used China with practical service requirements dispatching. This paper aims to propose key technologies and applications for China. Design/methodology/approach first briefly introduces functions configuration Some servers, terminals interfaces are introduced, which...

Purpose In order to solve the problem of inaccurate calculation index weights, subjectivity and uncertainty assessment in risk process, this study aims propose a scientific reasonable centralized traffic control (CTC) system method. Design/methodology/approach First, system-theoretic process analysis (STPA) is used conduct on CTC constructs indexes based analysis. Then, enhance accuracy weight calculation, fuzzy analytical hierarchy (FAHP), decision-making trial evaluation laboratory...

Abstract Station autonomous computer system is the core of centralized traffic control (CTC) system. The working mode dual hot standby, and its reliability very important. Due to dynamic fuzzy issue with analysis station system, a method formulated based on fault tree (DFT) Markov model. First, structure principle standby double 2‐vote‐2 are analyzed, two systems DFT formulated. Then, failure rates detection probabilities considered as variables represented triangular variables. state...

During railway operations, trains normally run as scheduled, but the occurrence of unexpected events will disrupt traffic flow and cause train deviation from original timetable. In or- der to assist dispatchers in rescheduling trains, this paper introduces an innovative Human- Computer Interaction framework. This framework enables propose different timetable adjustment instructions or adjusted These be processed, stored, analyzed, digested by computer program, which finally leads...

The centralized traffic control (CTC) system of intelligent railways plays a vital role in implementing railway dispatching, improving transportation efficiency, and ensuring train safety. However, with the development high-speed (HSRs), construction new lines upgrading existing equipment have become increasingly prevalent, posing significant challenges to safety reliability CTC system. To address these challenges, this article proposes scenario-driven parallel testing method for We use...

Obtaining the accurate real-time train number and location in a railway network is necessary for traffic operation control. This paper investigates implementation optimization method of tracking, by which information can be captured. According to characteristics operation, moving trajectory tracking problem, mathematical description problem model based on signaling states schedules are proposed. Then, using hidden Markov prediction proposed order improve correctness tracking. The simulation...

The Centralized Traffic Control (CTC) system plays an important role in ensuring safe and efficient rail transportation operations. It is mainly responsible for the implementation adjustment of train operation schedule through automatic control station signalling equipment. major task CTC to achieve a high efficiency under precondition safety. For this purpose, it necessary select appropriate safety schemes system. In paper, formal approach proposed quantitatively evaluate efficiencies with...

The complete scheduling problem of unmanned warehouse AGV is a complex NP-hard with process that includes three parts: task assignment dispatching, path planning, and traffic coordination. This study focuses on determining the optimal scheme for considering all known information. With goal balancing workload at each picking station, an unsupervised reinforcement learning-based classification method proposed. multi-task decomposed into two-stage problem. In order to reduce load stations,...

Dissolved oxygen (DO) is essential for the survival of most aquatic organisms. Hypoxia, defined as a DO concentration less than 2 mg L–1, significant issue ecosystems in estuaries and coastal waters one top themes United Nations Decade Ocean Science Sustainable Development (2021–2030). An area off Yangtze River Estuary (YRE), China, annually develops world ocean’s largest hypoxic areas. Observations collected by ship since 1999, long-term sensors 2009, show that this region has been both...

In this study, the train platform rescheduling problem (TPRP) at a high-speed railway station is analyzed. The adjustments of track assignment and arrival/departure times under arrival delays are addressed in TPRP. formulated as mixed-integer nonlinear programming model that minimizes weighted sum total costs. An improved genetic algorithm (GA) proposed, individual represented departure priority, which mixed encoding scheme with integers permutations. decoded into feasible schedule...

Modeling the graphical user interface (GUI) of mobile applications is a crucial task for automated robotic testing. Pixel-based modeling methods are non-intrusive and thus have potential truly black-box automation. However, existing can hardly produce accurate models because they do not take semantic structural information GUI into account. In this paper, we propose layered approach to address important problem. The proposed adopts method recognizing elements novel strategy semantics...

This paper studies the real-time trains routing and platforming problem (RT-TRPP) in railway stations that arises from unreliable arrival times of freight trains, flexible shunting operations dynamic station layout caused by equipment failure. The feasibility timetable is checked before preparing a route for train or after updating layout. If infeasible, reassignment triggered. After introducing formulation RT-TRPP, we propose an Integer Linear Program (ILP) strives to minimize number...

As the core equipment of decentralized autonomous Centralized Traffic Control (CTC), computer automatically generates instructions according to train operation plan, and sends them block interlocking system, which realizes monitoring control railway station signal so on. Whether basic data is correct or not directly affects transportation efficiency even endangers driving safety. Taking queue mapping table route as examples, this paper develops automatic test management sets up environment,...

Railway CTC (Centralized Train Control) system is widely applied in dispatching centers and stations of various railway bureaus for train operation command. In order to overcome the shortcomings existing test strategies background program system, this paper propose a new automated strategy. strategy, four types logfiles are added into logging module all programs test. An tool "Testmidware" newly developed. With prerecorded scripts, testers can conduct complete regression on functions...

Purpose This paper aims to propose a train timetable rescheduling (TTR) approach from the perspective of multi-train tracking optimization based on mutual spatiotemporal information in high-speed railway signaling system. Design/methodology/approach Firstly, single-train trajectory (STTO) model is constructed dynamics and operating conditions. The kinematics parameters, including acceleration, speed time at each position, are calculated predict arrival times timetable. A STTO algorithm...

Mobile navigation service is an important and popular location-based services, which help to recommend routes for mobile users their destinations. Modern provides various strategies considers many complex situations, make validation verification of becomes very difficult. In this paper, we present approach prioritize test cases regression testing Service. The based on the assumption that there may be a failure if user's actual route deviates from recommended route. analyze mass logs, compare...

Traffic capacity of a network is very vital to variety complex networks, such as communication networks and road in which the bandwidth every link limited or finite. In this work, inspired by deployment process nodes links real we assume composed constant part degree-related one that can be updated iteratively with hardware update. We propose bandwidth-based routing mechanism enhance traffic capacity. Extensive simulations both scale-free random are done confirm effectiveness our proposed...

As one of the modern means transportation, railways, especially high-speed play an important role in strategic transportation "Belt and Road". The CTC system is core railway train scheduling. We summarize analyze key technical problems that need to be solved urgently for localized systems "going out" undertake overseas projects, three issues general multi-language collaborative adaptation, scheduling algorithm optimization under low-specification hardware conditions, automatic testing...