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Article
DSCAE: a denoising sparse convolutional autoencoder defense against adversarial examples
Deep neural networks are a state-of-the-art method used to computer vision. Imperceptible perturbations added to benign images can induce the deep learning network to make incorrect predictions, though the per...
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Article
Open AccessGeomorphic contexts and science focus of the Zhurong landing site on Mars
As part of the Tianwen-1 mission, the Zhurong rover successfully touched down in southern Utopia Planitia on 15 May 2021. On the basis of the new sub-metre-resolution images from the High Resolution Imaging Ca...
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Article
Open AccessGround Validation Experiment and Spectral Detection Capability Evaluation of Mars Mineralogical Spectrometer (MMS) Aboard HX-1 Orbiter
As a hyperspectral imager aboard the orbiter “HX-1” of China’s first Mars mission, the Mars Mineralogical Spectrometer (MMS) is designed with hyperspectral and multispectral operation modes to survey the miner...
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Article
Open AccessTwo-billion-year-old volcanism on the Moon from Chang’e-5 basalts
The Moon has a magmatic and thermal history that is distinct from that of the terrestrial planets1. Radioisotope dating of lunar samples suggests that most lunar basaltic magmatism ceased by around 2.9–2.8 billio...
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Article
Open AccessChina’s Lunar and Planetary Data System: Preserve and Present Reliable Chang’e Project and Tianwen-1 Scientific Data Sets
Data infrastructure systems such as the National Aeronautics and Space Administration (NASA) Planetary Data System (PDS), European Space Agency (ESA) Planetary Data Archive (PSA)and Japan Aerospace Exploration...
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Article
A S-type bistable locally active memristor model and its analog implementation in an oscillator circuit
In this paper, a S-type memristor with tangent nonlinearity is proposed. The introduced memristor can generate two kinds of stable pinched hysteresis loops with initial conditions from two flanks of the initia...
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Article
Open AccessDetection Capability Verification and Performance Test for the High Resolution Imaging Camera of China’s Tianwen-1 Mission
High-resolution optical cameras have always been important scientific payloads in Mars exploration missions, which can obtain detailed images of Martian surface for the study of geomorphology, topography and g...
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Article
A simple chaotic circuit with magnetic flux-controlled memristor
In this paper, we build a simple chaotic circuit by introducing a new magnetic flux-controlled memristor model. The basic dynamics, such as the type of equilibrium point, phase diagram, bifurcation diagram, an...
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Article
Self-reproducing dynamics in a two-dimensional discrete map
This paper mainly explores the self-reproducing dynamics in discrete-time system by constructing a two-dimension map with infinitely many fixed points. Theoretical analysis shows that the attractor of the map ...
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Article
Open AccessDesign and Validation of the Scientific Data Products for China’s Tianwen-1 Mission
The Tianwen-1 mission is China’s first Mars exploration mission. To complete the scientific objectives of “orbiting, landing, and patrolling” in one mission, thirteen instruments for acquiring multi-disciplina...
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Article
Open AccessChina’s Mars Exploration Mission and Science Investigation
China’s first Mars exploration mission (Huo**ng-1) has been named as ‘Tianwen-1’ meaning Heaven Inquiry. Tianwen-1 was launched on July 23, 2020. In this paper, the scientific objectives of earlier and current...
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Article
Overview of the Chang’e-4 Mission: Opening the Frontier of Scientific Exploration of the Lunar Far Side
China’s Chang’e-4 (CE-4) mission is the first human lander/rover mission on the far side of the Moon. Its probe is composed of a lander, rover, and the Queqiao relay satellite. Queqiao was successfully launche...
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Article
Open AccessMars Mineralogical Spectrometer (MMS) on the Tianwen-1 Mission
The Mars Mineralogical Spectrometer (MMS) is a hyperspectral imager onboard the Mars orbiter of Tianwen-1, China’s first Mars exploration mission. MMS consists of 4 subassemblies: an Optical Sensor Unit (OSU),...
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Article
Image encryption algorithm with circle index table scrambling and partition diffusion
This paper introduces an image encryption algorithm shorted as CITSPD, manipulated by circle index table scrambling and partition diffusion. Firstly, the circle index table is obtained through the generation, ...
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Article
Open AccessLunar impact crater identification and age estimation with Chang’E data by deep and transfer learning
Impact craters, which can be considered the lunar equivalent of fossils, are the most dominant lunar surface features and record the history of the Solar System. We address the problem of automatic crater dete...
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Article
Open AccessLanding Site Selection and Overview of China’s Lunar Landing Missions
Landing site selection is of fundamental importance for lunar landing mission and it is closely related to the scientific goals of the mission. According to the widely concerned lunar science goals and the lan...
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Article
Extremely rich dynamics in a memristor-based chaotic system
By introducing a memristor to the jerk system, a four-dimensional (4D) chaotic system is proposed. This system has five line equilibrium points with different stability. The extremely rich dynamic behaviors ar...
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Article
Complicated dynamics in a memristor-based RLC circuit
As the fourth basic circuit element, the memristor is usually employed to design chaotic circuit for the special electrical properties. This paper introduces a memristor-based RLC oscillation circuit with fou...
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Article
Open AccessDescent trajectory reconstruction and landing site positioning of Chang’E-4 on the lunar farside
Chang’E-4 (CE-4) was the first mission to accomplish the goal of a successful soft landing on the lunar farside. The landing trajectory and the location of the landing site can be effectively reconstructed and...
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Article
Shadow–highlight feature matching automatic small crater recognition using high-resolution digital orthophoto map from Chang’E Missions
This paper introduces a new method of small lunar craters’ automatic identification, using digital orthophoto map (DOM) data. The core of the approach is the fact that the lunar exploration DOM data reveal con...
