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In order to accurately identify whether there are damages and damage types on the surface of the aerostat capsule, combined with the powerful data processing capabilities and abnormal pattern recognition capabilities of deep learning, this paper proposes a continuous wavelet transform (CWT) and deep convolution. The diagnosis method of capsule surface damage combined with convolutional neural network (Convolutional Neural Networks, CNN). First, use CWT to convert the collected original stress and strain signals into time-frequency domain images, and then use CNN to classify and identify the time-frequency domain images to determine the damage category of the capsule surface. The CWT-CNN method is different from the traditional fault diagnosis method, it needs to go through the traditional feature extraction process, and the pros and cons of the extracted features often determine the final recognition accuracy. This method effectively overcomes the traditional fault diagnosis method that requires a large amount of signal processing technology. And rich engineering practice experience to extract the shortcomings of fault experience. The experimental results show that the CWT-CNN method can achieve an accuracy of more than 95% in the recognition of the surface damage of the capsule.

Grouting technology is an important method of ground reinforcement and can effectively improve the stability of engineering rock mass. During overburden isolated grouting in coal mines, the influence of unexpected fractures may lead to substantial grout leakage, resulting in ineffective grouting. The existing natural sedimentation sealing method is mainly applicable to small fractures and low grout flow, while the chemical-reagent rapid-sealing method can cause grouting channel blocking, making it less suitable for overburden isolated grouting. This paper proposes a “capsule” sealing method, detailing the preparation of the sealing material and evaluation of its properties through testing. The sealing material, prepared using the air suspension method, was coated with paraffin on a superabsorbent polymer (SAP) material, which has delayed expansion characteristics. Although this material does not expand within the grouting fractures of overburden rock, it expands rapidly upon entering the leakage channel, accumulating within the channel to achieve effective sealing. A simulation experimental system was designed to simulate the sealing of the slurry leakage channel, and the sealing characteristics were experimentally investigated. Under consistent particle size conditions, a higher film cover ratio led to a more pronounced delayed expansion effect and extended the time required for the sealing material to achieve its maximum expansion. When the content of sealing material with particle sizes of 20 mesh, 40 mesh, and 60 mesh, and a film ratio of 20% was 1.0%, the fractures below 4 mm were effectively sealed. When the fracture aperture is 4–6 mm, the sealing material with a covering ratio of 20% or 30% should have a minimum content of 1.5%, while the sealing material with a covering ratio of 50% should have a minimum content of 2.0%. The findings of this study outline an effective prevention and control method for the sealing of abnormal slurry leakage in overburden isolated grouting engineering.

A capsule phase-change material (CPCM) was synthesized using n-tetradecane as the core, expanded graphite as the shell, and ethyl cellulose as the coating material through a controlled assembly process. The results demonstrate that the infiltration of n-tetradecane significantly enhances the density of the expanded graphite, while the ethyl cellulose coating effectively prevents the desorption and leakage of the liquid phase-change material during phase transitions. As a result, the CPCM exhibits a compact structure, chemical stability, and excellent thermal stability. The incorporation of this CPCM into cement-based materials endows the material with an autonomous heat-release capability at temperatures below 5[degrees]C. When the CPCM content reaches 20%, the thermal conductivity of the cementitious matrix increases by 24.66%. Moreover, the CPCM significantly improves the freezing-and-thawing resistance of the cement-based materials, reducing the compressive strength loss by 96% and the flexural strength loss by 65% after freezing-and-thawing cycles. This CPCM fundamentally enhances the frost resistance of cement-based materials, addressing the issue of freezing-and-thawing damage in concrete structures in cold regions. Keywords: capsule phase-change material (CPCM); cement-based materials; expanded graphite; frost resistance; n-tetradecane.

The article treats the descent of a stabilized spherical capsule to the Earth’s surface along the trajectory from near-lunar and low-Earth orbits. Approximate dependences approximating the known results of numerical and experimental studies are used to analyze the thermal protection environment of the capsule. The use of a material with a high degree of anisotropy of thermal conductivity in the composition of a heat-protective coating is considered. The results indicate that the capsule descent can be performed with no damage to its heat shielding.

Purpose To evaluate and compare the 1-year postoperative levels of posterior capsule opacification (PCO) as well as the level of anterior capsule retraction and opacification (ACO) after implantation of two single-piece hydrophobic acrylic intraocular lens (IOL) models. Methods Randomised, controlled, prospective and double-blind study including 148 eyes of 74 patients (age range, 61–80 years) with bilateral senile cataract. Each patient underwent surgery with implantation of an AcrySof SA60AT (Group A) in one eye and Tecnis ZCB00 (Group B) in the fellow eye by the same experienced surgeon. Lens allocation to the first or second operated eye followed a randomisation process. At 12 months postoperatively, the PCO level was evaluated with the Evaluation of Posterior Capsule Opacification software, whereas the level of ACO and capsule retraction was evaluated and graded subjectively. Results All surgeries were uneventful. The mean PCO scores were 0.10±0.17 and 0.21±0.89 in Groups A and B, respectively, with no statistically significant differences between the groups (p=0.47). No significant correlation was found between the PCO scores in Groups A and B (r=0.16, p=0.17). Regarding ACO, it was present in 15 eyes (20.3%) and two eyes (2.7%) in Groups A and B, respectively (p=0.37). Capsular phimosis (13 eyes, 17.6%) was only observed in Group A. Conclusions Both IOLs had a similar low rate of PCO 1 year after surgery. However, there seems to be a difference in the anterior capsule behaviour between both IOL models.

The development of facile and versatile strategies for thin-film and particle engineering is of immense scientific interest. However, few methods can conformally coat substrates of different composition, size, shape, and structure. We report the one-step coating of various interfaces using coordination complexes of natural polyphenols and Fe(III) ions. Film formation is initiated by the adsorption of the polyphenol and directed by pH-dependent, multivalent coordination bonding. Aqueous deposition is performed on a range of planar as well as inorganic, organic, and biological particle templates, demonstrating an extremely rapid technique for producing structurally diverse, thin films and capsules that can disassemble. The ease, low cost, and scalability of the assembly process, combined with pH responsiveness and negligible cytotoxicity, makes these films potential candidates for biomedical and environmental applications.

Purpose: To study the effect of intraocular lens (IOL) implantation with and without ocular viscoelastic device (OVD) on posterior capsular opacification (PCO) in eyes with phacoemulsification. Methods: This prospective, comparative, and randomized case series included 70 patients (140 eyes) with senile cataracts scheduled for phacoemulsification and IOL implantation in a tertiary eye c are center. One eye of each patient was randomized to one of the two groups, namely, control and OVD. After phacoemulsification, the IOL was placed in the capsular bag under balanced salt solution (BSS) in the control group, whereas the IOL was placed under OVD in the OVD group. PCO was analyzed by an independent observer at 6, 12, and 18 months under slit-lamp illumination. Results: The mean age of the participants in the two groups was 61.2 (±9.9) years. Of the total participants, 68 (48.5%) were men and 72 (51.5%) were women. The mean keratometry (K1, K2) values of the OVD (44.26 ± 1.43, 44.93 ± 1.66) and control (44.51 ± 1.74, 44.69 ± 1.49) groups were similar. The mean IOL powers of the control and OVD groups were 21.25 (±1.94) and 21.53 (±1.86), respectively (P = 0.463). The mean best-corrected visual acuity (BCVA) of the control group at 6-, 12-, and 18-month follow-ups were 0.622 (±0.253), 0.315 (±0.203), and 0.063 (±0.163), respectively, whereas those of the OVD group were 0.592 (±0.253), 0.336 (±0.169), and 0.066 (±0.118), respectively (P = 0.922). None of the patients had postoperative raised intraocular pressure (IOP), uveitis, or endophthalmitis. Three and four eyes in the control and OVD groups, respectively, required neodymium-doped yttrium aluminum garnet (ND: YAG) capsulotomy at study termination (P = 0.999). Conclusion: The hydroimplantation technique of the placement of hydrophilic IOL did not reduce the PCO rate in the 18-month follow-up period. The ND: YAG capsulotomy rate did not differ between the groups.

Manipulation of gut microbiota by bacterial metabolites has shown protective effects against colitis; while the efficacy is strictly limited by the poor oral delivery efficiency and single drug usage. Here, a novel prebiotics and postbiotics synergistic delivery microcapsule composed of indole‐3‐propionic acid (IPA) postbiotic and three prebiotics including alginate sodium, resistant starch (RS), and chitosan via microfluidic electrospray for preventing and treating colitis are proposed. It is found that oral administration of IPA microcapsules (IPA@MC) to mice can exert significant protective effects to colitis, suggesting the therapeutic synergy between prebiotics and postbiotics. Furthermore, the mechanism of the IPA@MC is revealed in modulating the gut microbiota, that is by significantly increasing the overall richness and abundance of short‐chain fatty acids (SCFA) producing bacteria such as Faecalibacterium and Roseburia. These results indicate that the prebiotics and postbiotics synergistic delivery microcapsules are ideal candidates for treating colitis. Novel prebiotics and postbiotics synergistic delivery microcapsule is developed via microfluidic electrospray for treating colitis. Oral administration of the indole‐3‐propionic acid microcapsules can exert significant protective effects to colitis by modulating the health of gut microbiota in mice. The richness and abundance of short‐chain fatty acids producing bacteria are significantly increased after receiving the microcapsule.

PURPOSE: To compare posterior capsule opacification (PCO) of a hydrophobic acrylic heparin surface modified intraocular lens (HSM-IOL) and an uncoated IOL (UC-IOL) 1 year after implantation. METHODS: One hundred two eyes of 51 patients underwent routine phacoemulsification with randomized implantation of a HSM-IOL in one eye (the HSM-IOL group) and a UC-IOL in the fellow eye (the UC-IOL group). Morphologic PCO evaluation was performed comparing digital photographs in retroillumination using the Evaluation of Posterior Capsule Opacification (EPCO) system, grading the density of the opacification from 0 to 4 (0 = none, 1 = minimal, 2 = mild, 3 = moderate, and 4 = severe). Distance visual acuities, subjective manifest refraction, pupil size, straylight measurements, flare in the anterior chamber using a laser flare meter, and contrast sensitivity were also evaluated. RESULTS: The mean total EPCO score was slightly higher in the HSM-IOL group (0.50 ± 0.45) compared to the UC-IOL group (0.45 ± 0.46), but did not reach statistical significance. No statistically significant differences were found in the other main outcome parameters (straylight measurement, distance visual acuities, flare in the anterior chamber, and mesopic and photopic contrast sensitivity) when comparing both IOLs. CONCLUSION: Although the HSM-IOL showed decreased flare 1 day postoperatively, no statistically significant differences regarding PCO were found 1 year postoperatively. [[ J Refract Surg. 2015;31(7):466–472.]