120 research outputs found
A Simplified Min-Sum Decoding Algorithm for Non-Binary LDPC Codes
Non-binary low-density parity-check codes are robust to various channel
impairments. However, based on the existing decoding algorithms, the decoder
implementations are expensive because of their excessive computational
complexity and memory usage. Based on the combinatorial optimization, we
present an approximation method for the check node processing. The simulation
results demonstrate that our scheme has small performance loss over the
additive white Gaussian noise channel and independent Rayleigh fading channel.
Furthermore, the proposed reduced-complexity realization provides significant
savings on hardware, so it yields a good performance-complexity tradeoff and
can be efficiently implemented.Comment: Partially presented in ICNC 2012, International Conference on
Computing, Networking and Communications. Accepted by IEEE Transactions on
Communication
Investigation of the stability of the anti-islanding detection in multi-DGs system
U radu je predstavljen poboljšani model multi-DGs mikro rešetki za analizu stabilnosti sustava tijekom vezivanja s rešetkom. DGs u sustavu opremljeni su
Sandia frequency shift (SFS) shemom kao načinom anti-islanding zaštite. Uvođenjem dužine linije distribucijske mreže, pozitivnog porasta povratne sprege SFSa i distribuiranog dovoda energije, parametri izlazne snage za poboljšanje matematičkog modela mikro energetskih rešetki uspostavljeni su u tri vrste parametara i odnosu između margine stabilnosti mikro energetske rešetke za postizanje stabilnosti sustava praga dužine linije energetske mreže, i stabilnosti granične vrijednosti napona izlazne snage distribuirane istosmjerne struje. Taj postupak omogućuje projektantima i inženjerima obnovljivih energetskih sustava optimiziranje sustava i osiguranje stabilnosti. Konačno, uzimajući u obzir nekoliko potvrđivanja simulacija, u radu se daje poboljšani model koji može utjecati na aktualnu implementaciju analize distribuirane mikro energetske rešetke, te se tako može donijeti zaključak o stabilnosti kritičkog praga parametara sustava. Na temelju tih analiza slučaja, pokazalo se da je stabilnost sustava vrlo važna za stabilnost mikrorešetki mnogih distribuiranih multi-DGs, koji su korisni za projektiranje i implementaciju novih energetskih sustava.This paper presents an improved model of multi-DGs microgrids for analysing system stability during grid-connections. The DGs-in the system are equipped with the Sandia frequency shift (SFS) scheme as an anti-islanding protection technique. By introducing a distribution network line length, SFS positive feedback gain and distributed power supply, power output parameters to improve the micro power grid mathematical model are established in three kinds of parameters and the relationship between micro power grid stability margin, to obtain stability of the system of power line length threshold, and stability of the distributed power dc output voltage threshold. This process allows the designers and engineers of renewable energy systems to optimize the system and ensure stability. Finally, in view of the several common simulation validations, this paper puts forward an improved model that can affect actual implementation of distributed micro power grid analysis, whereby the stability of the system parameters’ critical threshold may be deduced. Based on these case studies, system stability is shown to be very important to the stability of many distributed multi-DGs microgrids, which are useful for the design and implementation of new energy systems
Decision Fusion Network with Perception Fine-tuning for Defect Classification
Surface defect inspection is an important task in industrial inspection. Deep
learning-based methods have demonstrated promising performance in this domain.
Nevertheless, these methods still suffer from misjudgment when encountering
challenges such as low-contrast defects and complex backgrounds. To overcome
these issues, we present a decision fusion network (DFNet) that incorporates
the semantic decision with the feature decision to strengthen the decision
ability of the network. In particular, we introduce a decision fusion module
(DFM) that extracts a semantic vector from the semantic decision branch and a
feature vector for the feature decision branch and fuses them to make the final
classification decision. In addition, we propose a perception fine-tuning
module (PFM) that fine-tunes the foreground and background during the
segmentation stage. PFM generates the semantic and feature outputs that are
sent to the classification decision stage. Furthermore, we present an
inner-outer separation weight matrix to address the impact of label edge
uncertainty during segmentation supervision. Our experimental results on the
publicly available datasets including KolektorSDD2 (96.1% AP) and
Magnetic-tile-defect-datasets (94.6% mAP) demonstrate the effectiveness of the
proposed method
REPOFUSE: Repository-Level Code Completion with Fused Dual Context
The success of language models in code assistance has spurred the proposal of
repository-level code completion as a means to enhance prediction accuracy,
utilizing the context from the entire codebase. However, this amplified context
can inadvertently increase inference latency, potentially undermining the
developer experience and deterring tool adoption - a challenge we termed the
Context-Latency Conundrum. This paper introduces REPOFUSE, a pioneering
solution designed to enhance repository-level code completion without the
latency trade-off. REPOFUSE uniquely fuses two types of context: the analogy
context, rooted in code analogies, and the rationale context, which encompasses
in-depth semantic relationships. We propose a novel rank truncated generation
(RTG) technique that efficiently condenses these contexts into prompts with
restricted size. This enables REPOFUSE to deliver precise code completions
while maintaining inference efficiency. Through testing with the CrossCodeEval
suite, REPOFUSE has demonstrated a significant leap over existing models,
achieving a 40.90% to 59.75% increase in exact match (EM) accuracy for code
completions and a 26.8% enhancement in inference speed. Beyond experimental
validation, REPOFUSE has been integrated into the workflow of a large
enterprise, where it actively supports various coding tasks
Nanomaterials against intracellular bacterial infection: from drug delivery to intrinsic biofunction
Fighting intracellular bacteria with strong antibiotics evading remains a long-standing challenge. Responding to and regulating the infectious microenvironment is crucial for treating intracellular infections. Sophisticated nanomaterials with unique physicochemical properties exhibit great potential for precise drug delivery towards infection sites, along with modulating infectious microenvironment via their instinct bioactivity. In this review, we first identify the key characters and therapeutic targets of intracellular infection microenvironment. Next, we illustrate how the nanomaterials physicochemical properties, such as size, charge, shape and functionalization affect the interaction between nanomaterials, cells and bacteria. We also introduce the recent progress of nanomaterial-based targeted delivery and controlled release of antibiotics in intracellular infection microenvironment. Notably, we highlight the nanomaterials with unique intrinsic properties, such as metal toxicity and enzyme-like activity for the treatment of intracellular bacteria. Finally, we discuss the opportunities and challenges of bioactive nanomaterials in addressing intracellular infections
Dual functions of the ZmCCT-associated quantitative trait locus in flowering and stress responses under long-day conditions
Gene ontology enrichment of differentially expressed genes in HZ4 and HZ4-NIL in three development stages. (XLS 21Â kb
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