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Open Access Issue
Artificial intelligence-empowered applications, countermeasures, and challenges in battlefield environment information for aviation and aerospace transition zones
Journal of National University of Defense Technology 2026, 48(2): 163-177
Published: 01 April 2026
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Significance

The AATZ (aviation and aerospace transition zones), defined as the atmospheric layer between 50 and 250 km altitude, has been increasingly recognized as a critical domain for next-generation strategic competition. Unlike conventional near space studies limited to 20~100 km, this work systematically extended the analytical boundary upward to encompass the thermosphere–ionosphere coupling region (100~250 km)—a vacuum-dominated regime previously underrepresented in comprehensive reviews. In response to the growing deployment of hypersonic vehicles, low-Earth-orbit reconnaissance platforms, and advanced electronic warfare systems, the AATZ is no longer treated merely as a passive operational backdrop; rather, its highly dynamic atmospheric density, plasma irregularities, and complex electromagnetic propagation characteristics are now actively exploited as tactical variables in information confrontation.

Progress

To address the challenges posed by this high-dimensional, nonlinear, and rapidly evolving environment, AI(artificial intelligence) has been investigated as a transformative enabler across the full “perception–fusion–prediction–countermeasure” chain.

First, deep learning architectures—including encoder-decoder networks and convolutional-recurrent hybrids—have been employed to achieve efficient end-to-end inversion of key environmental parameters such as neutral density, electron concentration, and wind velocity from sparse and heterogeneous observations (e.g., GNSS(global navigation satellite system) radio occultation, radiosonde data, and airglow imagery). Second, multi-source data from ground-based radar, satellite remote sensing, and meteorological reanalysis are integrated through a fusion framework combining graph neural networks and attention mechanisms. This approach supports the construction of a mission-oriented digital twin of the battlefield environment and ensures consistency in high-dimensional situational awareness. Third, by embedding physical constraints such as mass conservation, energy conservation, and ion-neutral particle coupling dynamics into AI-driven meteorological models, the accuracy of short-term (within 6 hours) environmental forecasts has been significantly enhanced, achieving minute-level temporal resolution and spatial accuracy below 100 km. Finally, autonomous decision-making capabilities are developed through reinforcement learning and generative adversarial frameworks to support adaptive electronic countermeasures, including real-time waveform deception, cognitive jamming, and trajectory-aware interference, thus realizing “one-target-one-policy” and “one-moment-one-strategy” intelligent confrontation paradigms.

Conclusions and Prospects

It has been established that AI not only enhances the fidelity and timeliness of environmental characterization but also transforms passive environmental knowledge into an active combat advantage. The resulting information warfare chain enables dynamic adaptation to ionospheric scintillation, thermospheric drag anomalies, and sporadic-E layer disruptions. These phenomena were historically sources of uncertainty but are now leveraged as natural masking conditions for stealth penetration or communication denial.

Nevertheless, several critical bottlenecks were identified that impede the transition of AI from laboratory demonstration to operational deployment. These include: 1) inherent uncertainty in multi-sensor perception due to observational sparsity and calibration drift; 2) weak interpretability of deep predictive models, which leads to “black-box” decisions incompatible with high-stakes military operations; 3) poor cross-domain transferability when models trained in simulation fail to generalize under real-world perturbations or adversarial conditions; and 4) severe data scarcity caused by international restrictions on high-altitude measurements, which fundamentally limits the training robustness of domestically developed AI systems.

To address these challenges, four strategic pathways are proposed to bridge the gap between technical feasibility and combat credibility. First, trustworthy AI must be prioritized through the integration of physical laws into neural architectures, such as PINNs(physics-informed neural networks) and neural operators, to ensure consistency with first principles. Second, standardized evaluation benchmarks and adversarial testing environments should be established to enable interoperability across services and platforms. Third, indigenous data acquisition capabilities must be accelerated via high-altitude long-endurance platforms, hypersonic testbeds, and quantum-enabled remote sensing. Fourth, AI is expected to evolve into a cross-domain intelligent hub that fuses electromagnetic, kinetic, and cyber information to support advanced concepts such as cognitive electronic warfare and cooperative space-air interception.

In conclusion, AI is no longer merely a supporting tool but a core driver reshaping aerospace warfare. Only through systematic, interdisciplinary collaboration can the leap from “technologically usable” to “operationally trustworthy” be achieved, thereby securing strategic initiative in this decisive high frontier.

Review Issue
70 Years of Development in China’s Operational Numerical Weather Prediction
Journal of Meteorological Research 2025, 39(3): 485-516
Published: 29 April 2025
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Numerical weather prediction (NWP) is the core technology for weather forecast and disaster prevention and mitigation. The research and operational applications of NWP have always been highly valued in China, and have achieved great progress with an appreciable international influence in the theories, algorithms, and operational system developments. This paper first summarizes the scientific and technological evolution of NWP in China, and then focuses on the current status and recent updates of the two homemade global NWP systems: GRAPES (Global/Regional Assimilation and PrEdiction System) and YHGSM (YinHe Global Spectral Model). (1) GRAPES possesses both deterministic and ensemble forecast systems, with global (regional) model versions running on 12–50-km (3–10-km) resolutions. Significant improvements have been made on its dynamic core, four-dimensional variational (4D-Var) assimilation, satellite and radar data assimilation, ensemble forecast, and cloud microphysics schemes, and so on. It is capable to perform subseasonal to seasonal forecast and has incorporated an atmospheric chemistry model, typhoon numerical forecast model, and ocean wave model. (2) YHGSM continues to follow the development route of spectral models, featured prominently with a dry-mass conserved spectral dynamical core, ensemble 4D-Var assimilation, coupled ocean–land–atmosphere ensemble forecast, and the medium-term and monthly-extended global high-resolution forecast as the baseline. These NWP systems autonomouly developed by the China Meteorological Administration and the national defense insitution benefit from long-term adherence to the national science and technology development strategies and close research to operation practices.

Open Access Issue
A review of large eddy simulation of aviation turbulence
Acta Aerodynamica Sinica 2023, 41(8): 26-43
Published: 25 August 2023
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Aviation turbulence is an essential factor threatening flight safety. However, due to its complex mechanism, which study has been one of the key issues faced by the aviation industry. In recent years, with the development of large eddy numerical simulation (LES), which has become an important method to solve aviation turbulence problems. This study reviews the research progress of LES technology in the past few decades, focusing on the impact of aircraft trailing vortex wakes and low-level turbulence during the takeoff and landing phase, as well as convective induced turbulence, mountain wave turbulence, and clear air turbulence during the cruise phase on aircraft turbulence. It also summarizes and prospects the urgent problems to be solved in the application of LES technology and future key research directions. Overall, LES simulation research on aviation turbulence has got much achievement, which can clarify the source and lifecycle of aviation turbulence more clearly, significantly improving the mechanism cognition, quantitative diagnosis, prediction and warning capabilities. However, in terms of mechanism, the interaction mechanism of various complex turbulent processes is still unclear; in terms of numerical model techniques, the predictive skill of LES of aviation turbulence is still limited by errors in initial conditions, boundary conditions, and the models themselves (e.g., parameterizations, dynamical methods). In the future, the development of nesting and dynamic grid technology between LES and mesoscale regional models, high-resolution ensemble prediction methods and probability prediction approaches, as well as the combination with deep learning methods will further improve the computational efficiency and prediction ability of LES on aviation turbulence simulation and forecasting.

Regular Paper Issue
Improving Ocean Data Services with Semantics and Quick Index
Journal of Computer Science and Technology 2021, 36(5): 963-984
Published: 30 September 2021
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Massive ocean data acquired by various observing platforms and sensors poses new challenges to data management and utilization. Typically, it is difficult to find the desired data from the large amount of datasets efficiently and effectively. Most of existing methods for data discovery are based on the keyword retrieval or direct semantic reasoning, and they are either limited in data access rate or do not take the time cost into account. In this paper, we creatively design and implement a novel system to alleviate the problem by introducing semantics with ontologies, which is referred to as Data Ontology and List-Based Publishing (DOLP). Specifically, we mainly improve the ocean data services in the following three aspects. First, we propose a unified semantic model called OEDO (Ocean Environmental Data Ontology) to represent heterogeneous ocean data by metadata and to be published as data services. Second, we propose an optimized quick service query list (QSQL) data structure for storing the pre-inferred semantically related services, and reducing the service querying time. Third, we propose two algorithms for optimizing QSQL hierarchically and horizontally, respectively, which aim to extend the semantics relationships of the data service and improve the data access rate. Experimental results prove that DOLP outperforms the benchmark methods. First, our QSQL-based data discovery methods obtain a higher recall rate than the keyword-based method, and are faster than the traditional semantic method based on direct reasoning. Second, DOLP can handle more complex semantic relationships than the existing methods.

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