A5086724350- Chaos-based Image/Signal Encryption
- Cryptographic Implementations and Security
- Coding theory and cryptography
- Wireless Communication Security Techniques
- Radar Systems and Signal Processing
- graph theory and CDMA systems
- Internet Traffic Analysis and Secure E-voting
- Direction-of-Arrival Estimation Techniques
- Complexity and Algorithms in Graphs
- Network Security and Intrusion Detection
- Advanced Wireless Communication Techniques
- Gastrointestinal motility and disorders
- Cryptography and Data Security
- Advanced SAR Imaging Techniques
- Psychosomatic Disorders and Their Treatments
- Anomaly Detection Techniques and Applications
- Distributed Sensor Networks and Detection Algorithms
- Whipple's Disease and Interleukins
- Sexual function and dysfunction studies
- DNA and Biological Computing
- Neuroscience and Music Perception
- Wireless Body Area Networks
- Antenna Design and Analysis
- Sparse and Compressive Sensing Techniques
- Error Correcting Code Techniques
Xidian University
2012-2025
Institute of Software
2010
State Key Laboratory of Information Security
2010
A compact printed ultra-wideband (UWB) monopole antenna with dual band-notched characteristics is presented. One complementary split-ring resonator (CSRR) etched inside the patch of to achieve notch frequency bands. practical example for a UWB (working from 2.90 12 GHz) demonstrated, one band at 3.40–3.48 GHz and other 5.40–5.98 GHz. In addition, effect dimensions CSRR on bands also analysed.
In this paper, we consider the problem of detecting a signal in Gaussian noise with unknown covariance matrix, partially homogeneous environments where test and training data samples share same matrix up to an scaling factor. One solution is adaptive subspace detector (ASD) single or multiple observations. However, probabilities false alarm detection ASD have not been obtained yet. these expressions are derived on basis observation, which confirmed Monte Carlo simulations. It shown that has...
It is well known that the algebraic expression of advanced encryption standard (AES) Rijndael S-box very simple and only 9 terms are involved. In this paper a new method proposed to illustrate reason why AES simple, which corrects all available inaccurate illustrations. An improved also presented improve complexity with increasing from 255 degree invariable. The has good properties Boolean functions in SAC balance, capable attacking against differential cryptanalysis high reliable security.
A low angle estimation method in the presence of multipath for multiple-input multiple-output (MIMO) radar is proposed. The signal model MIMO constructed with both transmitted and received signals being considered. To reduce computational burden retain precision, beam-space maximum likelihood algorithm developed estimation. This overcomes effects measurement, only requires one one-dimension search procedure. Simulation results are presented to verify effectiveness proposed method.
Brain dysfunction in erectile (ED) has been identified by multiple neuroimaging studies. A recent MRI study indicated grey matter alterations ED patients. This aims to investigate the microstructural changes of cerebral white (WM) psychological patients and their possible correlations with clinical variables. Twenty-seven 27 healthy subjects (HS) were included underwent a magnetic resonance (MR) diffusion tensor imaging (DTI) scan. The tract-based spatial statistics employed identify WM...
Abstract Background Increasing evidence shows central abnormalities in functional dyspepsia ( FD ) patients, but whether the symptom severity is directly reflected altered brain patterns remains unclear. The purpose of this study was to explore how affected resting for different degrees severity. Methods Functional magnetic resonance imaging carried out 40 patients and 20 healthy controls. resting‐state changes regional homogeneity (ReHo) seed correlation analysis were investigated relative...
Abstract Background Previous studies summarized altered brain functional patterns in dyspepsia ( FD ) patients, but how the structural are related to remains largely unclear. The objective of this study was determine characteristics patients. Methods Optimized voxel‐based morphometry and tract‐based spatial statistics were employed investigate changes gray matter GM white WM respectively 34 patients with postprandial distress syndrome 33 healthy controls based on T1‐weighted...
Impossible differential attack (IDA) uses impossible characteristics extracted from enough plaintext pairs to retrieve subkeys of the first and last several rounds AES. In this paper, a general IDA on 7-round AES is proposed. Such takes number all-zero columns 7th 6th round as parameters (α, β). And trade-off relation between plaintexts times encryptions in process derived, which makes only some values β) allowed for different key length.
By chosing all the 232 plaintexts of four bytes in first round, it can generate 224 Λ <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">1</sup> sets. Each set will make input balanced fifth so be before round. If we combine partial sum technique, Lagrange interpolation attack completed. The research results show that attacking complexity decreased to 250, and is better than best existing result which 272.
When the airborne early warning (AEW) radar transmits signal with medium or high pulse repetitive frequency (PRF), range ambiguity occurs at receiver. For non-side looking (non-SLAR), short-range ambiguous clutter suffers from serious dependence. As a result, plus noise covariance matrix cannot be correctly estimated, and performance of suppression obtained by space-time adaptive processing (STAP) degrades greatly. A robust elevation prefiltering method is proposed. This can suppress...
In this paper, we present one method to attack on the GMR-2 algorithm used in satellite phone under chosen-plaintexts. First using relationship of rows two s-boxes and outputs F coordinate, algorithm. Then deduce happening probability read-collision, analyze its mathematical expectation. Finally, combining with an improved The research results show that complexity is about 220, session key Kc can be recovered 0.3 seconds. Compared available method, our takes less time than guess-and-decide...
By the discovered correlation between linear functions over GF(qn) and matrices GF (q), a new scheme is presented to resolve algebraic expression of Rijndael S-box in this paper. This has advantage predetermining case given random base GF(qn). The reason why only 9 terms are involved presented, which corrects available inaccurate illustration. We finally conclude all methods determine S-box.
This study presents a rate-distortion (RD) optimised quantisation algorithm for direct current (DC) coefficients of the Wyner–Ziv (WZ) frames in unidirectional distributed video coding. As side information (SI) could be viewed as 'corrupted' version original WZ frame, correlation noise (WZ-SI) can interpreted virtual channel with an error pattern. In this study, distortion caused by errors, besides is analysed emphatically their presented algorithm, novel RD model developed to find out...