3,556 research outputs found
Poly[[aquaÂbis(μ3-isonicotinato-κ3 O:O′:N)trisÂ(μ2-isonicotinato-κ3 O,O′:N)(nitrato-κO)bisÂ(μ4-oxalato-κ6 O 1,O 2:O 2:O 1′,O 2′:O 1′)dierbium(III)tetraÂsilver(I)] tetraÂhydrate]
In the title coordination polymer, {[Ag4Er2(C6H4NO2)5(C2O4)2(NO3)(H2O)]·4H2O}n, each ErIII atom is coordinated in a bicapped trigonal–prismatic coordination geometry by three O atoms from two isonicotinate (IN) ligands, four O atoms from two oxalate ligands and one O atom from either a nitrate ion or a water molÂecule, both of which are half-occupied over the same site. One AgI atom has a Y-shaped geometry defined by one N atom from one IN ligand, one O atom from another IN ligand and one O atom from an oxalate ligand. The other AgI atom is coordinated by two IN ligands and one O atom from an oxalate ligand. One of the IN ligands is disordered over an inversion center and forms a bridge between two centrosymmetric AgI ions. Due to the disorder, this IN ligand coordinates to the Ag atom through either the pyridyl N or the carboxylÂate O atoms. The IN and oxalate ligands link the Er and Ag atoms into a three-dimensional coordination framework. O—H⋯O and C—H⋯O hydrogen bonds are observed in the crystal structure
CodeTransOcean: A Comprehensive Multilingual Benchmark for Code Translation
Recent code translation techniques exploit neural machine translation models
to translate source code from one programming language to another to satisfy
production compatibility or to improve efficiency of codebase maintenance. Most
existing code translation datasets only focus on a single pair of popular
programming languages. To advance research on code translation and meet diverse
requirements of real-world applications, we construct CodeTransOcean, a
large-scale comprehensive benchmark that supports the largest variety of
programming languages for code translation. CodeTransOcean consists of three
novel multilingual datasets, namely, MultilingualTrans supporting translations
between multiple popular programming languages, NicheTrans for translating
between niche programming languages and popular ones, and LLMTrans for
evaluating executability of translated code by large language models (LLMs).
CodeTransOcean also includes a novel cross-framework dataset, DLTrans, for
translating deep learning code across different frameworks. We develop
multilingual modeling approaches for code translation and demonstrate their
great potential in improving the translation quality of both low-resource and
high-resource language pairs and boosting the training efficiency. We also
propose a novel evaluation metric Debugging Success Rate@K for program-level
code translation. Last but not least, we evaluate LLM ChatGPT on our datasets
and investigate its potential for fuzzy execution predictions. We build
baselines for CodeTransOcean and analyze challenges of code translation for
guiding future research. The CodeTransOcean datasets and code are publicly
available at https://github.com/WeixiangYAN/CodeTransOcean.Comment: Accepted by Findings of EMNLP 202
Distance Based Image Classification: A solution to generative classification's conundrum?
Most classifiers rely on discriminative boundaries that separate instances of
each class from everything else. We argue that discriminative boundaries are
counter-intuitive as they define semantics by what-they-are-not; and should be
replaced by generative classifiers which define semantics by what-they-are.
Unfortunately, generative classifiers are significantly less accurate. This may
be caused by the tendency of generative models to focus on easy to model
semantic generative factors and ignore non-semantic factors that are important
but difficult to model. We propose a new generative model in which semantic
factors are accommodated by shell theory's hierarchical generative process and
non-semantic factors by an instance specific noise term. We use the model to
develop a classification scheme which suppresses the impact of noise while
preserving semantic cues. The result is a surprisingly accurate generative
classifier, that takes the form of a modified nearest-neighbor algorithm; we
term it distance classification. Unlike discriminative classifiers, a distance
classifier: defines semantics by what-they-are; is amenable to incremental
updates; and scales well with the number of classes.Comment: accepted by IJC
Poly[[hemi-μ4-oxalato-hemi-μ2-oxalato-bisÂ(μ3-pyrazine-2-carboxylÂato)neodymium(III)silver(I)] monohydrate]
In the title coordination polymer, {[AgNd(C5H3N2O2)2(C2O4)]·H2O}n, the NdIII atom is coordinated in a distorted monocapped square-antiÂprismatic geometry by two O and two N atoms of two N,O-bidentate pyrazine-2-carboxylÂate (2-pzc) ligands, four O atoms of two bidentate oxalate ligands, and one O atom of a monodentate carboxylÂate group of a 2-pzc ligand. The AgI ion is coordinated in a distorted tetraÂhedral geometry by two N atoms from two monodentate 2-pzc ligands, one O atom from one monodentate oxalate ligand and one O atom of a bridging carboxylÂate group of a 2-pzc ligand. The oxalate anions link neighbouring neodymium(III) metal centres into Nd–oxalate chains, which are interÂconnected by Ag(2-pyz)2 units, forming a three-dimensional polymeric framework. InterÂmolecular O—H⋯O and C—H⋯O hydrogen bonds are observed in the crystal structure
A new task scheduling approach for energy conservation in Internet of Things
Internet of Things (IoT) and mobile edge computing (MEC) architectures are common in real-time application scenarios for improving the reliability of service responses. Energy conservation (EC) and energy harvesting (EH) are significant concerns in such architectures due to the self-sustainable devices and resource-constraint edge nodes. The density of the users and service requirements are further reasons for energy conservation and the need for energy harvesting in these scenarios. This article proposes decisive task scheduling for energy conservation (DTS-EC). The proposed energy conservation method relies on conditional decision-making through classification disseminations and energy slots for data handling. By classifying the energy requirements and the states of the mobile edge nodes, the allocation and queuing of data are determined, preventing overloaded nodes and dissemination. This process is recurrent for varying time slots, edge nodes, and tasks. The proposed method is found to achieve a high data dissemination rate (8.16%), less energy utilization (10.65%), and reduced latency (11.44%) at different time slots
Genomic Inference of the Metabolism and Evolution of the Archaeal Phylum Aigarchaeota
Microbes of the phylum Aigarchaeota are widely distributed in geothermal environments, but their physiological and ecological roles are poorly understood. Here we analyze six Aigarchaeota metagenomic bins from two circumneutral hot springs in Tengchong, China, to reveal that they are either strict or facultative anaerobes, and most are chemolithotrophs that can perform sulfide oxidation. Applying comparative genomics to the Thaumarchaeota and Aigarchaeota, we find that they both originated from thermal habitats, sharing 1154 genes with their common ancestor. Horizontal gene transfer played a crucial role in shaping genetic diversity of Aigarchaeota and led to functional partitioning and ecological divergence among sympatric microbes, as several key functional innovations were endowed by Bacteria, including dissimilatory sulfite reduction and possibly carbon monoxide oxidation. Our study expands our knowledge of the possible ecological roles of the Aigarchaeota and clarifies their evolutionary relationship to their sister lineage Thaumarchaeota
Effects of sea-buckthorn leaves on performance and serum metabolic profiles in Altay lambs
In this study, the effects of sea-buckthorn (Hippophae rhamnoides L.) leaves (SL) on the biochemical parameters and metabolomic profiling in Altay lamb (Ovis aries) were observed. Sixty six-month-old male Altay lambs (body weight 28.0 ± 3.5 kg) were randomly assigned to four groups (n=15). The experimental groups were named as CON, 2.5%, 5.0% and 7.5%. The group CON, contained animals fed with a basal diet. Animals of the other groups were fed a treatment diet consisting of 2.5% (Group 2.5%), 5.0% (Group 5.0%) and 7.5% (Group 7.5%) SL. The experimental period lasted 56 days. The results showed that the average daily gain (ADG) and average daily feed intake (ADFI) increased with the increase in the levels of dietary SL. Dietary SL showed a direct relationship with total protein (TP), albumin, globulin and total cholesterol (TC) content of the experimental animals. However, an indirect relationship was observed between dietary SL and the concentration of urea nitrogen (UN). The concentrations of glucose, high-density lipoprotein cholesterol (HDL-C) and low-density lipoprotein cholesterol (LDL-C) showed quadratic change. Additional changes occurred in the endogenous metabolites involving multiple pathways. The pathways were tricarboxylic acid (TCA) cycle, the metabolism of protein and amino acid and the metabolism of fatty acid and steroid. The changes in metabolites primarily revealed an increase in amino acids and carbohydrates and a decrease in lipid metabolites. These findings provide a comprehensive insight into the effects of the metabolic aspects of sea-buckthorn leaves on Altay lambs. In addition, the present research results provide a better understanding to the development and utilization of sea-buckthorn as a healthy additive for small ruminant production.Keywords: Hippophae rhamnoides L., lamb, metabolomics, growth performance, serum parameter
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