In this study, the effect of high-pressure quenching at 2, 3 GPa on martensitic transformation characteristics and mechanical properties 40Cr steel was examined using EBSD, Mössbaue, TEM. The results reveal that microstructure following is a mixture lath martensite plate martensite, with content increasing steadily as pressure increased. Plate exhibits distinct in 2 GPa-sample, either crossing prior austenite grain (PAG) or growing from boundary into interior. are distributed clusters,...

Accurate truck travel time prediction (TTP) is one of the critical factors in dynamic optimal dispatch open-pit mines. This study divides roads mines into two types: fixed and temporary link roads. The experiment uses data obtained from Fushun West Open-pit Mine (FWOM) to train three types machine learning (ML) models based on <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mrow><mml:mi>k</mml:mi></mml:mrow></mml:math>-nearest neighbors (kNN), support vector (SVM),...

Queue forms at merge bottleneck area on freeways if the mainline and on-ramp traffic demand exceeds capacity of bottleneck. Then discharge flow further drops below which is termed as drop phenomenon. This study aims to develop control strategies Variable Speed Limits (VSL) for improving efficiency freeway via preventing drop. The Cell Transmission Model (CTM) was developed calibrated with field data evaluate effectiveness VSL. results showed that by reducing speed limit in VSL upstream area,...

The drivers are supposed to have sufficient distance in order watch for the changes of surroundings before cars such as traffic conditions, highway alignments, scenery design and so on, take corresponding actions ensure driving safely. Based on principle vertical curve design, this paper discusses safe conditions highways obtains relationship between length curve, stopping sight algebra difference grades. Combined with safety evaluation one expressway, proposes some reasonable...

In this study, a model-free adaptive sliding mode control method was developed in combination with the prescribed performance method. On basis, study attempted to fulfill joint position tracking trajectory task for one-degree of freedom (DOF) upper-limb exoskeleton passive robot-assisted rehabilitation. The proposed is capable addressing defect initial error controller design and application by adopting tuning function, as compared other methods. Moreover, here not determined dynamic model...

The real-time track association and fusion task(the AF task) aims to integrate the tracks of maritime targets collected by sensors into a coherent track. In real-world scenarios, data single sensor often lacks required stability, falling short meeting demands various applications. While adopting multi-sensor-based task methods is prevalent, existing approaches have overlooked critical aspects, including temporal consistency. This paper tackles crucial challenges in multi-sensor tasks,...

In order to resolve the problem that is low precision, slow speed and time consuming, which come out when selecting by artificial. This paper developed an automatic selection machine of cylinder length, use advanced PLC controller take place conventional mechanical control type. Moreover, it employs synchronous controllable loading material distribution mechanism, greatly improved precision efficiency. Save production cost due contacting sensors. Rotary disk type feeding integral design...

Compared to the onshore wind turbine, floating offshore turbine (FOWT) suffers from worse environmental loads during its operation, leading complicated dynamic responses. The excessive vibration would be potentially harmful structure safety and reliability. Tuned Mass Damper (TMD) is regarded as a promising mitigation device has been popularized in FOWTs recently. However, effects on of TMD still difficult investigate due flexibility FOWT system varied excitations. This paper presents an...

Keyword：truck dispatching; wardrop principle; comprehensive resistance; equilibrium distribution

With the rapid development of electronic information technology, computer and space highway surveying technology virtual scene in design road become more important. The traditional survey is mainly flat-type design. made this way two-dimensional one. Only by making to a can we see overall effect theoretical basis research will be found from original static graphic into dynamic visual use model software. Through concept conversion, make By modeling dynamically analyzing, analyze, improve...

This paper discusses a problem of regulating the quality video monitoring in terms communication for UAV moving targets. Very little research has been done on this problem. The aim is to improve by optimising path and adjusting monitoring, which can be monitor ground targets real time over longer distances. proposes dynamic adjustment algorithm under planning (VQDA-PP algorithm) solve communicates ensuring that current position at some sense shortest distance from data reception point if...

As an unsupervised and value-based reinforcement learning (RL) algorithm, Q-learning is effective tool to determine off-policy strategies for corresponding agents which mimic the behaviors of physical plants. In order further improve rail-line efficiency, virtual coupling mode has been recognized as development direction, receiving wide concerns from both theoretical research practical applications. this paper, a QCA-learning algorithm control strategy with continuous actions (CA), aliased...

Gold and Bitcoin are two volatile assets that market traders frequently purchase. In order to maximize returns, want us develop a model uses past daily price data determine scenarios for buying, holding, or selling in their portfolios. This paper focuses on portfolio investment strategy gold bitcoin, providing comprehensive forecasting decision making, combining variety of economic indicators, using sensitivity analysis hierarchical analyze evaluate the model. article divides into parts[1]:...