Introduction:
The Zhangjiapingzi gold deposit, located at the western margin of the Yangtze Craton and controlled by the Jinhe-Chenghai deep fault, is a newly discovered super-large gold deposit in ...the Danba-Mianning metallogenic belt. The gold ore bodies are hosted in the Middle Triassic (T
2
) altered dolomite (Dm), and have two types of mineralization: altered rock type and quartz vein type. Previous studies on this deposit are rare, especially on the ore-fluid characteristics, which limit the understanding on the ore genesis.
Methods:
This study focused on fluid inclusions in quartz from altered rocks, and used microthermometry and laser Raman spectroscopy to investigate the properties and sources of ore-forming fluids, and to determine the ore genetic type.
Results and discussion:
The results show that the fluid inclusions are mainly CO
2
-H
2
O-NaCl inclusions, with medium temperature (220–300°C), low salinity (<10%), medium-low density (0.79–1.01 g/cm
3
) and high contents of CO
2
and CH
4
, resembling typical orogenic gold ore fluids. We suggest that the Zhangjiapingzi is best classified as orogenic type, and our findings provide new insights into the fluid origin and metallogenesis of orogenic gold deposits in the Danba-Mianning metallogenic belt.
The novel high-temperature adhesives (HTAs) were prepared using phenol–formaldehyde (PF) resin as matrix and elemental silicon or boron carbide as modification additives. The bonding properties of ...the above adhesives were investigated by the bonding experiment on graphite substrate. The graphite joints were heat treated at high temperatures ranging from 200 to 1500
°C. It was shown that the degradation and the content of PF resin had important influences on the bonding properties of the HTAs. The pyrolysis and degradation of the organic resin led to the drastic volume shrinkage and the decrease of mechanical strength of resin matrix. It is the main reason leading to the failure of the joints treated at high temperatures, especially in the range of 400–650
°C. It is concluded that the satisfactory bonding property of the novel organic resin matrix HTAs lies in two aspects: (i) the selection of additives with good modification effect, and (ii) the optimized ratio between resin matrix and modification additives.
Highlights • 8716 epilepsy patients from 38 independent studies were included. • Six models were used for comparisons of genotypes in meta-analyses. • Significant associations of C3435T with ...resistance to AEDs were showed. • Subgroup analyses based on different factors were done. • Cumulative meta-analyses by publication year and sample size were adopted.
Schizophrenia (SCZ), bipolar disorder (BD) and depressive disorder (DD) are common psychiatric disorders, which show common genetic vulnerability. Previous gene–disease association studies have ...reported correlations between d-amino acid oxidase activator (DAOA) gene polymorphisms and the three psychiatric disorders. However, the findings were contradictory. A meta-analysis was therefore conducted to provide more robust investigations into DAOA polymorphisms and the risk of SCZ, BD and DD.
This meta-analysis recruited 46 published studies up to July 2013, including 17,515 cases and 25,189 controls. Odds ratios (ORs) with 95% confidence intervals (CIs) were used to evaluate the association between three specific DAOA SNPs and SCZ, BD and DD. Publication bias was tested by Begg's test and funnel plot, and heterogeneity was assessed by the Cochran's chi-square-based Q statistic and the inconsistency index (I2). Moreover, the robustness of the findings was estimated by cumulative meta-analysis.
DAOA genetic polymorphisms (M15, M18 and M23) were not found to confer a statistically significant increased risk of SCZ, BD or DD in the overall sample, or in Caucasians and Asians following subgroup analysis.
The current study indicated that M15, M18 and M23 might not be the risk factor for SCZ, BD or DD. However, further studies are required to provide robust evidence to estimate the association between DAOA polymorphisms and psychiatric disorders.
•17,515 cases and 25,189 controls from 46 independent studies were included.•No significant associations of M15with risks to SCZ, BD and DD were shown.•No significant associations of M18 with risks to SCZ, BD and DD were shown.•No significant associations of M23 with risks to SCZ, BD and DD were shown.•Cumulative meta-analyses by publication year were adopted.
The joining of ceramic materials is one of the key factors that influence its successful application in wider fields. And the joining between different kinds of materials has more values and ...significances in the realistic society. In this paper, graphite/alumina ceramic joints were achieved by means of bonding method. A high-temperature adhesive was prepared by using phenol–formaldehyde resin as matrix and boron carbide (B
4C) as additive. The graphite/alumina joints were bonded by the above adhesive and treated at different temperatures. The adhesive strength was tested at room temperature. Results showed that the high-temperature adhesive possessed satisfactory adhesive property for the joining of graphite/ceramics (Al
2O
3). The adhesive strength of the joints treated at 600
°C and 800
°C was not satisfactory due to the decline of the cement framework, which was derived from the carbonization of the resin. But good adhesive strength and thermal shock resistance were achieved when the treat temperature was above 1000
°C. As to the test of thermal shock resistance, the adhesive strength of the joints decreased at the beginning and then was stabilized and rose again after experiencing several shock cycles. By means of scanning electron microscope (SEM), the micrograph of bonding interface was investigated and showed that the failure mode of joint was due to the mixing failure. Ceramic substrates could be found on the bonding interface due to the high bonding force.
Towards Fine-Grained Concept Generation Li, Chenguang; Liang, Jiaqing; Xiao, Yanghua ...
IEEE transactions on knowledge and data engineering,
01/2023, Letnik:
35, Številka:
1
Journal Article
Recenzirano
Constructing large-scale taxonomies are crucial for many knowledge-rich applications that need concepts to better understand texts. However, current taxonomies suffer from the scarcity of concepts. ...Specifically, many fine-grained concepts are missing, while these fine-grained concepts play important roles in understanding related instances more deeply. In this paper, we propose an unsupervised fine-grained concept generation framework called FGCGen, which takes advantages of knowledge bases to generate mass of fine-grained concepts. Specifically, instead of extracting concepts from corpus, FGCGen detects entity heads and modifiers from knowledge bases and combines them to generate fine-grained concepts. We identify critical challenges of this generation process and employ three novel modules to solve them. We evaluate proposed methods on both Chinese and English datasets to show the strength of FGCGen, especially on constructing large-scale high-quality fine-grained taxonomies. Extensive experiments are introduced to prove the efficiency and effectiveness of the modules in FGCGen.
Bamboo, one of the richest non-timber resources, thrives in vast tropical and subtropical regions around the world. The surge of interest in bamboo materials stems from their profound contributions ...to polymer matrix composites, lauded for their environmental sustainability, mechanical properties, and recyclability. However, the inherent hydrophilicity of bamboo poses a challenge to achieve optimal compatibility with hydrophobic polymer matrices, impede interfacial bonding, and reduce the effectiveness of fiber-reinforced composites. To address these hurdles, economical and environmentally sustainable heat treatment methods have emerged as pivotal tools for enhancing the surface properties of bamboo. Delving into the depths of thermal treatment research, this article meticulously summarizes the influences of varying temperatures, time, and medium on the structure of bamboo. Moreover, it reviews the mechanical properties and surface moisture content of bamboo after heat treatment, providing insights crucial for advancing the frontier of bamboo-based materials.
Aspect sentiment triplet extraction is an important task in natural language processing. Previous work tends to focus on the interaction between the aspect and opinion, while ignoring the positive ...impact of sentiment on interaction within the triplet. In this paper, we propose a novel aspect sentiment triplet extraction model based on dual learning with sequential prompting. This model is designed as a bidirectional extraction framework that fully takes sentiment polarity into account in the interaction process of aspect and opinion. Besides, we introduce a dual loss as a regularization term for the extraction model to promote better learning in both directions. We further design a sequential prompting strategy to determine aspect, opinion, and sentiment polarity more accurately, which utilizes the results extracted in the previous step as prior knowledge to guide the prediction of the next target. We conduct experiments on three public datasets and the results show the effectiveness of our method. More importantly, we deploy our method on Fliggy application and the 14-day online A/B testing indicates that Page View Click-Through Rate and Page View Conversion Rate increase by 1.17% and 1.08% when user short reviews are used for tagging items with the help of our method.
Inspired by the biomimic lotus leaves, superhydrophobic aluminum alloy surfaces (SAAS) with modified nano-/micro-structures were prepared by different methods. Their surface morphology and ...hydrophobic properties were studied by using scanning electron microscopy (SEM) and contact angle meter, respectively. The results demonstrate the superhydrophobic surfaces irregular porous structures were successfully fabricated. Similar to lotus leaf surfaces, the depth and width of corrosion pits were in the range of 5–30µm and 5–20µm, respectively. The total thickness of the films was in the range of 5–30μm. The water contact angles (WCAs) were larger than 150° and the water sliding angles (WSAs) were lower than 10°. The best superhydrophobicity was obtained by acid etching method, the stearic acid–ethanol coating was used to modify the irregular porous surfaces, with the average WCAs and WSAs of 166±1.8° and 7°, respectively. The method is facile, the materials is inexpensive and is expected to be used widely.
•Superhydrophobicity was obtained on aluminum alloy surface by different methods.•The irregular porous surfaces structures were similar to lotus leaf surfaces.•The stearic acid–ethanol coating was used to modify the irregular porous surfaces.•The best superhydrophobicity was the surface prepared by acid etching method.•The method is facile, the materials is inexpensive and is expected to be used widely.
