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Evaluation methods for the intelligence of unmanned monitoring ships in non-cooperative scenarios
Journal of Tsinghua University (Science and Technology) 2026, 66(6): 1178-1189
Published: 08 June 2026
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Objective

With the rapid development of unmanned technologies, unmanned monitoring ships have become indispensable platforms for marine fishery monitoring and illegal fishing detection, offering advantages such as high flexibility, extended endurance, and remote operability. These platforms significantly expand monitoring scope, improve detection precision, and reduce labor costs. However, the evaluation of intelligence for water-based unmanned platforms remains in its initial stage. Existing evaluation frameworks are predominantly designed for land-based autonomous vehicles and fail to address the unique characteristics of unmanned monitoring ships, including complex marine environments, dynamic non-cooperative targets, and adversarial interactions. Current methods focus primarily on static functional descriptions or virtual environment testing, lacking the capability to reflect real-world dynamic interactions and environmental uncertainties. To address these critical limitations, this study aims to establish a comprehensive, scientific, and targeted intelligence evaluation methodology specifically tailored for unmanned monitoring ships operating in non-cooperative scenarios.

Methods

This paper proposes a multi-layered evaluation system comprising three core components. First, the UP-RAGAs (Unmanned Platform-based Retrieval-Augmented Generation Assessment) framework is constructed by reconstructing the traditional RAGAs framework into three stages—task input, platform response, and action output—thereby adapting it to real-scenario operational logic and supporting both algorithm-level software testing and system-level integrated evaluations. Second, a function mapping grading method is developed, classifying intelligence into 0—9 grades across three dimensions: autonomy (independent decision-making capability), cooperativity (multi-sensor data fusion and interoperability), and study ability (adaptive improvement through environmental interaction). Complementing this qualitative approach, an ontology capability evaluation method is proposed, involving 12 key capability indicators distributed across four perception stages: detection (optical imaging, multi-channel fusion, target detection), recognition (target identification, key component detection, behavioral intention analysis), positioning (distance measurement, coordinate transformation, track generation), and tracking (target acquisition, stable tracking, trajectory prediction). Third, to address non-cooperative scenarios characterized by dynamic target behaviors and environmental uncertainties, an innovative OODA+E (Observe-Orient-Decide-Act plus Effect) evaluation method is developed by integrating OODA loop theory with environmental and target state factors. Furthermore, a Bayesian-based multi-factor linkage model is established to dynamically quantify the influence of target movement levels, relative distances, viewing angles, and weather conditions on perception performance, enabling comprehensive assessment under dynamic adversarial conditions.

Results

Validation through a typical operational scenario demonstrates the effectiveness and feasibility of the proposed methodologies. The ontology capability evaluation successfully quantifies intelligence using normalized data across the four perception stages, revealing specific performance characteristics. The OODA+E method effectively incorporates dynamic factors, revealing that high target mobility significantly degrades tracking stability, while relative distance inversely affects detection accuracy and positioning precision. Additionally, weather condition variations impact optical imaging performance following expected probabilistic distributions. These quantitative results confirm that the proposed framework can accurately assess intelligence levels under complex, non-cooperative conditions where traditional static evaluation methods would prove inadequate, providing granular insights into factor-specific influences on system intelligence.

Conclusions

The proposed evaluation system successfully integrates static grading, quantitative capability assessment, and dynamic multi-factor analysis, effectively addressing the limitations of existing methods that are confined to cooperative scenarios and static testing environments. By realizing multi-dimensional and multi-level intelligence evaluation spanning algorithm performance to system-wide operational effectiveness, this research provides reliable technical support for the standardized application, performance optimization, and mission planning of unmanned monitoring ships in marine-related fields. The innovative incorporation of Bayesian-based multi-factor linkage analysis significantly enhances the scientific rigor and practical applicability of intelligence assessment, offering a systematic and comprehensive solution for advancing the deployment of intelligent unmanned platforms in complex maritime operations characterized by uncertainty and adversarial dynamics.

Open Access Issue
Spatial-Temporal ConvLSTM for Vehicle Driving Intention Prediction
Tsinghua Science and Technology 2022, 27(3): 599-609
Published: 13 November 2021
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Driving intention prediction from a bird’s-eye view has always been an active research area. However, existing research, on one hand, has only focused on predicting lane change intention in highway scenarios and, on the other hand, has not modeled the influence and spatiotemporal relationship of surrounding vehicles. This study extends the application scenarios to urban road scenarios. A spatial-temporal convolutional long short-term memory (ConvLSTM) model is proposed to predict the vehicle’s lateral and longitudinal driving intentions simultaneously. This network includes two modules: the first module mines the information of the target vehicle using the long short-term memory (LSTM) network and the second module uses ConvLSTM to capture the spatial interactions and temporal evolution of surrounding vehicles simultaneously when modeling the influence of surrounding vehicles. The model is trained and verified on a real road dataset, and the results show that the spatial-temporal ConvLSTM model is superior to the traditional LSTM in terms of accuracy, precision, and recall, which helps improve the prediction accuracy at different time horizons.

Open Access Issue
Application-Oriented Performance Comparison of 802.11p and LTE-V in a V2V Communication System
Tsinghua Science and Technology 2019, 24(2): 123-133
Published: 31 December 2018
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In recent years, the Vehicle-to-Vehicle (V2V) communication system has been considered one of the most promising technologies to build a much safer and more efficient transportation system. Both simulation and field test have been extensively performed to evaluate the performance of the V2V communication system. However, most of the evaluation methods are communication-based, and although in a transportation environment, lack a V2V application-oriented analysis. In this study, we conducted real-world tests and built an application-oriented evaluation model. The experiments were classified into four scenarios: static, following, face 2 face, and crossing vertically, which almost covered all the V2V communication patterns on the road. Under these scenarios, we conducted experiments and built a probability model to evaluate the performance of 802.11p and LTE-V in safety-related applications. Consequently, we found out that improvements are still needed in Non-Line-of-Sight scenarios.

Open Access Issue
Dynamic Parameters Cellular Automaton Model for Passengers in Subway
Tsinghua Science and Technology 2015, 20(6): 594-601
Published: 17 December 2015
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To simulate the passenger behavior in subway system, a Dynamic Parameters Cellular Automaton (DPCA) model is put forward in this paper. Pedestrian traffic flows during waiting, getting on or off, and traveling can be simulated. The typical scenario in Beijing Subway Line 13 is modeled to analyze the passenger behavior in subway system. By comparing simulation results with statistical ones, the correctness and practicality of the DPCA model are verified. At last, the additional results made by DPCA model can make contribution to passenger comfort analysis and pedestrian facility planning and guidance.

Open Access Issue
Missing Data Imputation for Traffic Flow Based on Improved Local Least Squares
Tsinghua Science and Technology 2012, 17(3): 304-309
Published: 15 June 2012
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Complete and reliable field traffic data is vital for the planning, design, and operation of urban traffic management systems. However, traffic data is often very incomplete in many traffic information systems, which hinders effective use of the data. Methods are needed for imputing missing traffic data to minimize the effect of incomplete data on the utilization. This paper presents an improved Local Least Squares (LLS) approach to impute the incomplete data. The LLS is an improved version of the K Nearest Neighbor (KNN) method. First, the missing traffic data is replaced by a row average of the known values. Then, the vector angle and Euclidean distance are used to select the nearest neighbors. Finally, a regression step is used to get weights of the nearest neighbors and the imputation results. Traffic flow volume collected in Beijing was analyzed to compare this approach with the Bayesian Principle Component Analysis (BPCA) imputation approach. Tests show that this approach provides slightly better performance than BPCA imputation to impute missing traffic data.

Open Access Issue
RMT-Based Urban Traffic Cross-Correlation Analysis and Its Application on Traffic Incident Impact Analyses
Tsinghua Science and Technology 2012, 17(1): 104-112
Published: 01 February 2012
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Cross-correlating traffic flow data at different intersections in an urban transportation network is important for understanding the collective behavior of constituents in a complex system and for predicting the risk of network-wide congestion. In this work, a Random Matrix Theory (RMT) based method is used to describe the collective behavior from massive traffic data sets. Nonrandom correlations between traffic flow series recorded in the Beijing road network occur both with and without detrending. The effect of the traffic load on the correlation patterns of network-wide traffic flows is analyzed using the RMT analysis of a simulated data set collected from Paramics. The RMT analysis is also used to evaluate the impact of incidents on the network-wide traffic status. Cluster analysis is used to find the largest cluster in the network which indicates the critical congestion caused by the incident. All the results show that RMT analyses are an effective method for investigating systematic interactions in urban transportation systems.

Total 6