Through a series of experiments using denitrifying phosphorus-accumulating sludge in sequencing batch reactors (SBRs), the variations of the intracellular polymers during the anaerobic phosphorus release process at ...
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Through a series of experiments using denitrifying phosphorus-accumulating sludge in sequencing batch reactors (SBRs), the variations of the intracellular polymers during the anaerobic phosphorus release process at different pH values were compared, the probable reasons for different performances of phosphorus removal were examined, and system operations in a typical cycle were investigated. The results show that the phosphorus removal rate was positively correlated with pH values in a range of 6.5-8.5. When the pH value was 8.0, the anaerobic phosphorus release rate and anoxic phosphorus uptake rate of the activated sludge were 20.95 mg/(g, h) and 23.29 mg/(g, h), respectively; the mass fraction of poly-13-hydroxybutyrate (PHB) increased to 62.87 mg/g under anaerobic conditions; the mass fraction of polyphosphate was 92.67 mg/g under anoxic conditions; and the effluent concentration of total phosphorus (TP) was 1.47 mg/L. With the increase of pH, the mass fraction of acetic acid and PHB also increased, and the absorption rate of acetic acid was equal to the disintegration rate of polyphosphate. When the pH value was above 8.0, biological phosphorus removal was achieved by chemical phosphorus precipitation, and the phosphorus removal rate decreased.
Intelligent vehicle applications provide convenience but raise privacy and security *** of sensitive data,including vehicle location,and facial recognition information,poses a threat to user ***,traffic classification...
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Intelligent vehicle applications provide convenience but raise privacy and security *** of sensitive data,including vehicle location,and facial recognition information,poses a threat to user ***,traffic classification is vital for promptly overseeing and controlling applications with sensitive *** this paper,we propose ETNet,a framework that combines multiple features and leverages self-attention mechanisms to learn deep relationships between ***-Net employs a multisimilarity triplet network to extract features from raw bytes,and exploits self-attention to capture long-range dependencies within packets in a session and contextual information ***,we utilizing the loss function to more effectively integrate information acquired from both byte sequences and their corresponding *** simulated evaluations on datasets with similar attributes,ET-Net demonstrates the ability to finely distinguish between nine categories of applications,achieving superior results compared to existing methods.
This study focuses on the electrical properties and microstructure of polypropylene(PP)-based blends used for cable insulation in nuclear power plants(NPPs). The PP-based blend, comprising isotactic PP and propylene-b...
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This study focuses on the electrical properties and microstructure of polypropylene(PP)-based blends used for cable insulation in nuclear power plants(NPPs). The PP-based blend, comprising isotactic PP and propylene-based elastomer(PBE) at concentrations ranging from 0 to 50 wt%, underwent a melt blending process and subsequent cobalt-60 gamma-ray irradiation with doses ranging from 0 to 250 kGy. Electrical conductivity, trap distribution, and alternating(AC) breakdown strength were chosen to assess the insulation performance. These results indicate that the addition of PBE significantly improves the electrical properties of PP under irradiation. For PP, the electrical conductivity increased with irradiation, whereas the trap depth and breakdown strength decreased sharply. Conversely, for the blend, these changes initially exhibit opposite trends. When the irradiation was increased to 250 kGy, the AC breakdown strength of the blend improved by more than 21%compared to that of PP. The physical and chemical structures of the samples were investigated to explore the improvement mechanisms. The results offer insights into the design of new cable-insulation materials suitable for NPPs.
Loess-mudstone landslides are common in the Loess *** into the mechanical theory of loess-mudstone landslides have become a challenging undertaking due to the distinctive interfacial properties of loess-mudstone and t...
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Loess-mudstone landslides are common in the Loess *** into the mechanical theory of loess-mudstone landslides have become a challenging undertaking due to the distinctive interfacial properties of loess-mudstone and the unique water sensitivity characteristics of ***,it is imperative to develop innovative mechanical models and mathematical equations specifically tailored to loess-mudstone *** this study,we analyze the fracture mechanism of the loess-mudstone sliding zone using plastic fracture mechanics and develop a unique fracture yield *** calculate the energy release rate during the expansion of the loess-mudstone interface tip region,the shear fracture energy G is applied,which reflects both the yield failure criterion and the fracture failure *** better understand the instability mechanism of loess-mudstone landslides,equilibrium equations based on G are established for tractive,compressive,and tensile loess-mudstone *** on the equilibrium equation,the critical length Lc of the sliding zone can be used for the safety evaluation of loess-mudstone *** this way,this study proposes a new method for determining the failure mechanism and equilibrium equation of loessmudstone landslides,which resolves their starting mechanism,mechanical equilibrium equations,and safety evaluation indicators,thus justifying the scientific significance and practical value of this research.
Na_(3)V_(2)(PO_(4))_(3)(NVP)has garnered great attentions as a prospective cathode material for sodium-ion batteries(SIBs)by virtue of its decent theoretical capacity,superior ion conductivity and high structural ***,...
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Na_(3)V_(2)(PO_(4))_(3)(NVP)has garnered great attentions as a prospective cathode material for sodium-ion batteries(SIBs)by virtue of its decent theoretical capacity,superior ion conductivity and high structural ***,the inherently poor electronic conductivity and sluggish sodium-ion diffusion kinetics of NVP material give rise to inferior rate performance and unsatisfactory energy density,which strictly confine its further application in ***,it is of significance to boost the sodium storage performance of NVP cathode *** to now,many methods have been developed to optimize the electrochemical performance of NVP cathode *** this review,the latest advances in optimization strategies for improving the electrochemical performance of NVP cathode material are well summarized and discussed,including carbon coating or modification,foreign-ion doping or substitution and nanostructure and morphology *** foreign-ion doping or substitution is highlighted,involving Na,V,and PO_(4)^(3−)sites,which include single-site doping,multiple-site doping,single-ion doping,multiple-ion doping and so ***,the challenges and prospects of high-performance NVP cathode material are also put *** is believed that this review can provide a useful reference for designing and developing high-performance NVP cathode material toward the large-scale application in SIBs.
This paper proposes a lightweight reinforcement network (LRN) and auxiliary label distribution learning (ALDL)based robust facial expression recognition (FER) *** designed representation reinforcement (RR) network mai...
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This paper proposes a lightweight reinforcement network (LRN) and auxiliary label distribution learning (ALDL)based robust facial expression recognition (FER) *** designed representation reinforcement (RR) network mainly comprises two modules,i.e.,the RR module and the auxiliary label space construction (ALSC) *** RR module highlights key feature messaging nodes in feature maps,and ALSC allows multiple labels with different intensities to be linked to one ***,LRN has a more robust feature extraction capability when model parameters are greatly reduced,and ALDL is proposed to contribute to the training effect of LRN in the condition of ambiguous training *** tested our method on FER-Plus and RAF-DB datasets,and the experiment demonstrates the feasibility of our method in practice during rehabilitation robots.
Developing organic room-temperature phosphorescence (RTP) materials with a wide range of tunable-emission is significant in expanding the applications of RTP ***,we rationally designed amphiphilic alternating copoly...
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Developing organic room-temperature phosphorescence (RTP) materials with a wide range of tunable-emission is significant in expanding the applications of RTP ***,we rationally designed amphiphilic alternating copolymers poly(1,2-bis(4-alkoxyphenyl)ethane-1,2-dione-alt-(ethylene glycol)x)(P(Bz-alt-EGx)) that combined the advantage of alternating benzil and EGxskeleton,and tunable mainchain *** a mainchain conformation ordering assembly (COA) process,P(Bz-alt-EGx) self-assembled into well-defined platelets,and such assemblies emitted blue RTP at ca.425 nm due to the ordered folded-chain conformation and confined *** contrast,traditional self-assembly (TA) of P(Bz-alt-EGx) obtained less ordered aggregates,such as asymmetric worms,vesicles,and rod-like *** resultant less ordered aggregates exhibited yellow-green RTP at ca.550 *** wide-tuning RTP emission in solution (between blue and yellow-green,over125 nm) is realized using the P(Bz-alt-EGx) alternating copolymers under the treatment of different self-assembly *** study uncovers a new strategy to tailor the RTP emission through different self-assembly pathways and holds great promise for the fabrication of advanced optical materials.
Vascular disrupting agents(VDAs) can destroy tumor vasculature and lead to tumor ischemia and hypoxia, resulting in tumor necrosis. However, VDAs are easy to induce the upregulation of genes that are associated with c...
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Vascular disrupting agents(VDAs) can destroy tumor vasculature and lead to tumor ischemia and hypoxia, resulting in tumor necrosis. However, VDAs are easy to induce the upregulation of genes that are associated with cancer cell drug resistance and angiogenesis in tumor cells. Hypoxia-activated chemotherapy will be an ideal supplement to VDAs therapy since it can help to fully utilize the ischemia and hypoxia induced by VDAs to realize a synergistic antitumor therapeutic outcome. Here, we design a liposome whose surface is modified with a tumor-homing peptide Cys-Arg-Glu-Lys-Ala(CREKA, which can specifically target tumor vessels and stroma) and whose aqueous cavity and lipid bilayer are loaded by a hypoxia-activatable drug banoxantrone dihydrochloride(AQ4N) and a VDA combretastatin A4(CA4),respectively. CA4 can selectively target vascular endothelial cells and destroy the tumor blood vessels, which will cause the rapid inhibition of blood flow in tumor and enhance the hypoxia in the tumor region. As a consequence, AQ4N can exert its boosted cytotoxicity under the enhanced hypoxic environment. The as-prepared liposome with a uniform particle size exhibits good stability and high cancer cell killing efficacy in vitro. In addition, in vivo experiments confirm the excellent tumortargeting/accumulation, tumor vasculature-damaging, and tumor inhibition effects of the liposome. This work develops a liposomal which can achieve safe and effective tumor suppression without external stimulus excitation by only single injection, and is expected to benefit the future development of effective antitumor liposomal drugs.
In spinless systems,growing attention has recently been attracted to synthetic gauge fields,which redefine the fundamental crystal symmetries by utilizing the projective algebraic ***,synthetic gauge fields have been ...
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In spinless systems,growing attention has recently been attracted to synthetic gauge fields,which redefine the fundamental crystal symmetries by utilizing the projective algebraic ***,synthetic gauge fields have been commonly investigated in single orbital systems,and explorations on hybrid orbitals remain elusive in ***,we report the experimental observation of hybrid topological phases induced by hybrid synthetic gauge flux,which is formed by the interaction between p and d orbitals embedded in acoustic *** breaking the translation symmetries of Lxand/or Ly,we unambiguously demonstrate the first-order M?bius edge states and higher-order corner *** work establishes a platform for seeking exotic topological phases induced by hybrid-orbitals interactions and initializing the framework of hybrid-orbitalsrelated topological *** applications can be anticipated in scenarios such as high-quality sensing and robust wave trapping due to the stepwise energy distribution of the hybrid topological phase.
Aramid fibers,due to their relatively high inter-yarn friction,high strength,high modulus,and other characteristics,have become a typical representative of flexible anti-ballistic materials in modern *** research on t...
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Aramid fibers,due to their relatively high inter-yarn friction,high strength,high modulus,and other characteristics,have become a typical representative of flexible anti-ballistic materials in modern *** research on the anti-penetration of aramid fabrics mostly focuses unilaterally on the structure and performance of aramid fabrics or the shape and size of projectiles,with fewer studies on the coupled effect of both on ballistic *** study analyzes how the coupling relationship(or size effect)between the projectile and fiber bundle dimensions affects the fabric ballistic performance from a mesoscopic scale *** plain weave aramid fabric as the research object,considering different diameter projectiles,through a large number of ballistic impact tests and numerical simulations,parameters such as ballistic limit velocity,average energy absorption of fabric,and specific energy absorption ratio(average energy absorption of fabric divided by projectile cross-sectional area)are obtained for ballistic performance *** influence law of projectile size on the ballistic performance of high-performance fabrics is as follows:The relative range of fitted ballistic limit velocity at different target positions gradually decreases and then stabilizes as the projectile diameter increases,indicating that the fabric structure effect gradually disappears at a projectile diameter of 12 mm;The average ballistic limit velocity at three impact positions,P1,P2,and P3,provides the corresponding ballistic limit velocity for 1000D aramid fabric,which increases with projectile diameter but the rate of increase slows down at an inflection point,which in this study occurs where the fabric structure effect nearly disappears at a projectile diameter of 12 mm;The energy absorption ratio increases and then decreases as the projectile diameter increases from 4 mm to 20 mm,reaching a peak at the diameter of 12 mm due to the gradual disappearance of the fabri
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