Retraction Note: Performance analysis of ethylene-propylene diene monomer sound-absorbing materials based on image processing recognition

In recent years, learning based super-high resolution image reconstruction technology has been rapidly applied. It also has good development and application effect in related fields. So in this paper, by combining the characteristics of SAR image, the learning based super-high resolution image reconstruction technology is added to the field of super-high resolution image reconstruction, and has been applied in reality. Image classification and ultra-high resolution technology are closely integrated. However, because the hardware facilities of some equipment are relatively expensive, and will inevitably be affected by other factors in the imaging process, in order to better study the influence of the increase of dissolved total solids in groundwater on the water level in the core of the funnel in the plain area, and the main components of the increase of dissolved total solids in groundwater. Every country in the world is carrying on a kind of propaganda to its national image, which is also a main manifestation of the overall level of the country. This paper studies the process of City English translation, makes corresponding analysis and preparation before city English translation, and pays attention to relevant reply and report after city English translation. This paper focuses on the construction system of City English translation and the improvement of the ways and methods of using English to publicize the city. Through the construction of City English translation system, this paper expounds the influence of Public English translation in City publicity construction, and changes the corresponding strategies for high-resolution image processing, so as to make English translation more accurate for the change process of total dissolved solids in groundwater, and improve the ability and level of City English translation.

Rubbers have a wide range of usage in polymeric materials since materials with a wide variety of mechanical properties can be obtained by varying the type or addition rates of the materials contained in the rubber in addition to the important properties such as high elasticity, good abrasion resistance, and low deformation. High-performance properties of the material are provided by cross-linking (vulcanization). Raw rubbers do not contain cross-links. In this study, it was aimed to examine the changes that may occur in the mechanical properties of the newly prepared EPDM rubber by changing the composition of the available Ethylene Propylene Diene Monomer (EPDM) rubber. For this purpose, a new rubber mixture, of which composition had been previously known and which was developed in this study, was prepared in two different Banbury mixers (tangential and intermeshing types), and both samples were subjected to mechanical and rheological analyses. The most important criteria in mechanical properties are tensile strength and elongation at break. As these properties increase, the final product becomes more durable. When tensile strength and elongation at break of the EPDM rubber prepared according to the new formulation were compared with the available EPDM rubber, a significant increase was observed in these two values in the EPDM rubber sample prepared with the new formula. In conclusion, it was shown with the characterization analyses that the newly developed modified EPDM rubber can be used in the rubber industry.

The publisher has retracted this article in agreement with the Editor-in-Chief. The article was submitted to be part of a guest-edited issue. An investigation by the publisher found a number of articles, including this one, with a number of concerns, including but not limited to compromised editorial handling and peer review process, inappropriate or irrelevant references or not being in scope of the journal or guest-edited issue. Based on the investigation's findings the publisher no longer has confidence in the results and conclusions of this article. D. Sharmila did not respond to correspondence from the publisher regarding this retraction. The Publisher has not been able to obtain a current email address for L. Rajasekar. Publisher's note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

The publisher has retracted this article in agreement with the Editor-in-Chief. The article was submitted to be part of a guest-edited issue. An investigation by the publisher found a number of articles, including this one, with a number of concerns, including but not limited to compromised editorial handling and peer review process, inappropriate or irrelevant references or not being in scope of the journal or guest-edited issue. Based on the investigation's findings the publisher no longer has confidence in the results and conclusions of this article. Publisher's note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Retraction Note: Application of IoT optical sensing image processing equipment based on load balancing algorithm in sports physical fitness detection

Retraction Note: Application of wearable sensors based on infrared optical imaging in mobile image processing in basketball teaching

With the continuous development of computer networks and the continuous popularization of computer network technology, image detection technology has gained a lot of room for development with the help of the development of image processing technology, and has also been greatly improved in a period of development. When people carry out geotechnical engineering construction, the stability of the slope is related to the safety and construction effect of the entire project. In the specific operation process, researchers usually use appropriate calculation methods to calculate various parameters in engineering construction, and use calculations to specifically determine the stability of highway slopes. In order to improve the safety of geotechnical engineering construction and the stability of highway slopes, this article selects the parameters involved in the slope stability analysis method for analysis, and establishes an equation for reliability analysis during the analysis. By comparing the analysis results of other methods, the researchers believe that the limit equation set in this article can improve the reliability of slope stability analysis. This article also designs a method of human motion image detection, which specifically studies the human motion posture, and uses the characteristics of the skeleton point image and the Euclidean distance to accurately recognize the human motion.

In this study, multicomponent flame retardant systems, consisting of ammonium polyphosphate (APP), aluminum trihydroxide (ATH), and polyaniline (PANI), were used in ethylene propylene diene monomer (EPDM) rubber. The multicomponent system was designed to improve flame retardancy and the mechanical properties of the rubber compounds, while simultaneously reducing the amount of filler. PANI was applied at low loadings (7 phr) and combined with the phosphorous APP (21 phr) and the mineral flame retardant ATH (50 phr). A comprehensive study of six EPDM rubbers was carried out by systematically varying the fillers to explain the impact of multicomponent flame retardant systems on mechanical properties. The six EPDM materials were investigated via the UL 94, limiting oxygen index (LOI), FMVSS 302, glow wire tests, and the cone calorimeter, showing that multicomponent flame retardant systems led to improved fire performance. In cone calorimeter tests the EPDM/APP/ATH/PANI composite reduced the maximum average rate of heat emission (MARHE) to 142 kW·m−2, a value 50% lower than that for the unfilled EPDM rubber. Furthermore, the amount of phosphorus in the residues was quantified and the mode of action of the phosphorous flame retardant APP was explained. The data from the cone calorimeter were used to determine the protective layer effect of the multicomponent flame retardant systems in the EPDM compounds.

A series of ethylene propylene diene monomer (EPDM) nanocomposites have been prepared. First of all, EPDM is modified by grafting maleic anhydride to EPDM backbone. Subsequently, ethanolamine, 3-aminopropyltriethoxysilane and glycerine are added to react with the pendent anhydride to form grafted polyimides or polyols, respectively. The primary inorganic precursor, tetraethylsiloxane, is incorporated into these variously modified EPDM under acid condition to form the EPDM composites. The thermal properties of thermogravimetric analysis shows that the 20 % weight loss temperatures and char yields of various EPDM composites are higher than that of pristine EPDM. From the dynamic mechanic analysis studies, it exhibits both E′ and E″ of the composites are much higher than that of EPDM matrix. As confirmed by scanning electron microscopy, phase distributions of nano-inorganic component/SiO2 evenly disperse in these EPDM composites are correlated to exhibit higher rigidity and toughness than that of neat EPDM.

Abstractγ‐irradiation of ethylene–propylene diene monomer (EPDM) elastomers under oxidant atmosphere was carried out in order to change their mechanical and dielectric behaviour. Three different formulations of EPDM (70 wt% ethylene, 28 wt% propylene; diene monomer: 2 wt% norbornene) were studied: a non‐crosslinked EPDM terpolymer, a crosslinked EPDM and a crosslinked EPDM stabilized with an antioxidant. Dielectric and mechanical relaxation show a β‐sub‐glass relaxation at about −120 °C (1 Hz) and an α‐relaxation at −15 °C (1 Hz) associated with the glass transition but influenced by the effects of irradiation. The local mobility associated with the β‐relaxation is only weakly influenced by γ‐irradiation up to 450 kGy. The α‐process is shifted to higher temperatures as a result of crosslinking and changes in the semicrystalline structure. The amplitude of the dielectric α‐process increases as a result of the formation of oxidized species during irradiation under oxygen. In contrast, the mechanical α‐relaxation amplitude decreases as a result of physical and chemical cross‐linking. It was shown that the main factors that determine the crosslinking/chain scission balance are (1) the presence of oxygen together with the irradiation dose, (2) the dose rate and (3) the initial crosslink density of the EPDM material. As a result, the individual contribution of crosslinking and crystallization, and therefore the understanding and prediction of the properties after γ‐irradiation can only be deduced after comparison of the polymer behaviour below and above its melting temperature. Copyright © 2004 Society of Chemical Industry

Composites from ethylene propylene diene monomer (EPDM) rubber filled with different concentrations 20, 40, and 60 parts per hundred rubber (phr) of aluminum oxide (Al2O3) were prepared. The samples were vulcanized by gamma irradiation at doses (50,100, 150, and 200) kGy. The effects of irradiation doses and Al2O3 contents on the mechanical prorerties (particularly tensile strength, elongation at break % and hardness), physical properties (volume fraction and crosslinking density), thermal properties was studied by thermogravimetric analysis (TGA) and fire resistance was tested using Limiting Oxygen Index (LOI) and rate of burning methods of EPDM and its composites were studied. The results indicated that the improvement of mechanical as well as, physical properties occurred by increasing the concentration of Al2O3 (except the tensile strength values, where the highest values were obtained at concentration 20 phr Al2O3 in the composite irradiated at 100 kGy). The thermal stability and fire retardancy properties of the prepared composites were improved by increasing Al2O3 concentration. Generally, the addition of Al2O3 and gamma irradiation has improved composite’s performance. This is suitable for preparing products of rubber serving in dynamic conditions, with longer expected service life

The goal of this research is to evaluate the recovered chitosan from locally discarded shrimp shells for usage as a biofiller for ethylene propylene diene monomer (EPDM) rubber in green chemistry industries. The utilization of two distinct fillers are expected to improve the qualities of industrial applications while lowering the cost. A laboratory two-roll mill, was used to prepare the rubber nanocomposites by incorporating nano fumed silica and chitosan as biomaterials into the EPDM rubber matrix. The mechanical and morphology characteristics of the produced EPDM rubber were investigated. The rubber nanocomposites were exposed to gamma irradiation doses ranging from 20 to 150 kGy. The tensile strength (TS) of the EPDM/chitosan/fumed silica vulcanizate increased when the chitosan concentration was raised up to 5 phr, but the elongation at break was reduced. However, the use of fumed silica as binary filler with chitosan improved the mechanical performance and thermal stability. The influence of gamma irradiation on the mechanical properties was also explored. The antimicrobial activity of the EPDM nanocomposites agaist Gram-positive (S. aureus) and Gram-negative (E. coli) bacteria was investigated in terms of the zone of inhibition. The results indicated that the nanocomposites irradiated to 100 kGy and containing 10 phr fumed silica and 5 phr chitosan exhibited the highest mechanical, thermal, and antibacterial characteristics and might be used in a variety of applications such as packaging material and surface application/coating based for different devices

Effect of bonding systems and antioxidants on the adhesion between EPDM rubber and polyester fabric

Flame-retardant EPDM compounds containing phenanthrene to enhance radiation resistance

This study evaluates the performance of ethylene propylene diene monomer (EPDM) composites for rubber sealing applications in a cable-based tsunami system. Rubber composites were prepared using EPDM rubber with varying monomer and filler content to determine the most suitable composite. Mechanical characterization reveals that the composition of EPDM and the amount of filler loading influence the mechanical properties. Dynamic mechanical analysis shows that ethylene and 5-ethylene-2-norbornene (ENB) content influence the glass transition and viscoelastic behavior of the composite. Thermal analysis of rubber composites using EPDM containing 70% ethylene and 5% ENB indicates no change in thermal stability due to prolonged immersion in seawater. Visual inspection using a microscope reveals no cracks on the surface of the rubber seal after the pressure chamber test for rubber composites utilizing EPDM with 70% ethylene and 5% ENB. It was shown that EPDM containing 70% ethylene and 5% ENB, with optimal reinforcement with 80 phr carbon black, exhibits the best performance for rubber sealing applications in subsea environments.