After adding conductive materials into the concrete matrix, cracks can be monitored in real-time through change of resistance when cracking. However, will affect working and mechanical properties concrete. Therefore, this paper studied influence rule failure characteristics addition such as steel fiber nanocarbon black on Combined with performance index mix, it comprehensively determined optimal dosage range different types under single mixing factor. Then, orthogonal test method three...

Multi-robot coordinated wire-arc directed energy deposition (MRC-WA-DED) has proliferated in recent decades, employing asynchronous independent heating sources to deposit material simultaneously. Beyond enhancing efficiency, MRC-WA-DED introduces a synergic effect between the sources, resulting controllable thermal field on component. This research aims investigate if is beneficial for residual stress and distortion reduction how it can be applied enhance quality of MRC-WA-DEDed parts. A...

Microbial transmissions via membrane surface and single-use plastic-induced pollution are two urgent societal problems. This research introduces a scalable fabrication strategy for fully biobased antibacterial ultraviolet-B block polylactic acid (PLA) films integrating natural coatings nanopatterns ultrasonic atomization spray coating thermal nanoimprinting lithography (TNIL) techniques, respectively. Tannic (TA) gallic (GA) were formulated prior to TNIL using anode aluminum oxide template....

Abstract In the conventional process of thermoplastic composites, a heating stage from external heat source usually consumes large amount energy. To solve this problem, self‐resistance electric (SRE) carbon fiber‐reinforcement was introduced to form continuous fiber reinforced polyamide 6 (CF/PA 6) composite based on film stacking technique in paper. The temperature distribution first measured verify uniformity for SRE process. X‐ray photoelectron spectroscopy (XPS) used assess effects...

Using reclaimed water as a resource for landscape replenishment may alleviate the major problems of shortages and environment pollution. However, safety risk eutrophication caused by are unclear to public research community. This study aimed reveal differences between natural discuss rationality from perspective microorganisms. The microbial community structures in water, biofilms were analyzed, succession was clarified along ecological niches, resources, fluidity time using 16S rRNA gene...

Abstract As an effective heating method, self‐resistance electric (SRE) was applied for welding, hot stamping and curing process of composites. In this study, the characterization Joule deconsolidation behavior continuous carbon fiber reinforced polyamide 6 (CFR‐PA6) laminate under SRE were investigated. A series experiments performed to build relationship among geometry sizes, current density temperature response. Then between rising rate CFR‐PA6 with twill weave fabric determined. The...

Due to adverse factors such as load and environment exposure, concrete structures often work with cracks during their service period. The occurrence growth of significantly reduces safety durability the structures. It is thus significant track monitor in real-time. This paper studies strength, toughness, crack self-monitoring performance a large number smart mixes through addition two conductive materials, i.e., steel fiber nano carbon black, into concrete. Firstly, effect adding individual...

Metal(loid) pollutants in road dust (road-deposited sediment) show obvious seasonal characteristics under the influence of sources. However, short-term (days to weeks) variations metal contamination different functional areas with antecedent dry days (ADDs) and their relationships source factors were poorly understood, which reduced comparability researches effectiveness pollution remediation. Herein, temporal As, Ba, Ca, Cd, Cr, Cu, Pb Zn studied two distinct Nanjing, i.e. an urban park...

Most directed energy deposition (DED) implementations employ a rigid end effector to deposit material layer-by-layer, which is insufficient in cases with space constraints. To enhance the flexibility, this paper proposes novel soft-robotic gun (SRG) based DED technology. The ideology replace weld tendon-driven omnidirectional-steering continuum manipulator, computer can numerically control. end, both requirements and concepts of SRG-DED are introduced. A prototype system designed implemented...

Wire arc additive manufacturing (WAAM) offers a viable solution for fabricating large-scale metallic parts, which contain various forms of inclined thick-walled structure. Due to the variety heat dissipation conditions at different positions, structure is major challenge in fabrication that may produce collapses and defects. However, there lack effective sensing method acquiring forming appearance individual beads This paper proposes novel approach extracting bead profiles during WAAM...

As an energy-saving and efficient composites-forming technology, the properties of carbon fiber self-resistance electric (SRE) heating technology still need to be improved, which is not conducive popularization application this technology. To deal with problem, SRE was combined a compression molding process form carbon-fiber-reinforced polyamide 6 (CF/PA 6) composite laminates in study. Orthogonal experiments three factors (temperature, pressure, impregnation time) were designed study effect...

In order to study the rapid start-up technology of anaerobic ammonium oxidation process, a comparison test no magnetic field and was performed in two identical ASBR reactors R1 R2 respectively. The results show that both can successfully start Anammox. period (75d) applied is shortened by 15% compared with unloaded (90d); ammonia-nitrogen removal rate 97% higher than 95% R1. quantitative relationship analysis between NH 4 + -N, NO 2 - -N 3 shows change ratio closer theoretical value, which...

Under anaerobic low carbon source, the reactor was started-up by inoculating sludge. The nitrogen removal efficiency and conversion pathway during start-up process were analyzed. At same time, structure succession of bacteria in analyzed PCR-DGGE technology from molecular biology level. results showed that inoculated sludge had a good effect on under condition source.

In this paper, the laser weld technology was applied to produce welded joints of CLF-1, which is primary material manufacturing TBM. After welding, first joint kept as-welded state, second treated at 710°C for 2h (abbreviation PWDT), third solution heat 980°C 1 h and tempered 2 PWNT). There some influence on grain size different treatment processes. It turned out that abundant lath martensite with width 800 nm few δ-Fe were found in joint. Its impact energy about 40 J, its hardness 400-425...