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The proenvironmental behavior of Sea Foods Enterprises is the microfoundation for the transformation and upgrading of the traditional marine aquatic industry. Integrating institutional theory and strategic cognitive theory, we use 221 marine aquaculture companies as research samples to explore the driving effect of strategic flexibility (resource flexibility and coordination flexibility) and institutional pressure (regulatory pressure and normative pressure) on proenvironmental behavior, and the mediating role of paradoxical cognition. The conclusion is as follows: (1) strategic flexibility and institutional pressure jointly drive Sea Food Enterprises to adopt proenvironmental behaviors, of which regulatory pressure has the most significant impact. (2) Paradox cognition plays a partial mediating role in the interaction between resource flexibility, coordination flexibility, regulatory pressure, and proenvironmental behavior. There is no mediating effect in the interaction between normative pressure and proenvironmental behavior.

The Baihetan superhigh arch dam is the largest hydropower station under construction in the world. Columnar jointed basalt (CJB) is widely distributed and densely jointed at the foundation of the Baihetan superhigh arch dam and poses a potential risk to its overall stability. A method of overburden consolidation grouting of the rock mass is proposed that solves the problem of unloading relaxation of CJB due to excavation of the exposed rock mass. The results show the following. 1) The method of nonoverburden grouting cannot achieve the quality inspection standard requirement that at least 90% of the wave velocities be greater than or equal to 4200 m/s, and the overall wave velocity of the rock mass before excavation is greater than that after grouting. 2) After overburden consolidation grouting of the rock mass, which includes controlling grouting pressure and concentration and performing perforation and sequence grouting, the water permeability of the inspection holes is less than 3 Lu, more than 90% of the wave velocities in the rock mass are greater than 4200 m/s, and the integrity of the rock mass is greatly improved. 3) The problems of conventional consolidation grouting technology are solved to protect the thin layer of breccia lava at the foundation of the Baihetan dam. In addition, the problem of unloading relaxation of CJB due to exposure to consolidation grouting is solved in the Baihetan superhigh arch dam project. This application has reference significance for the design and application of consolidation grouting in similar projects.

The synergistic effect of PVP and iodine in PVP-I enhanced the charge mobility and transport because of the improved crystallinity and energy cascade, which eventually generated a PCE of 15.73%.

The interface closely related to carrier transport plays a vital role in high-performance perovskite solar cells (PSCs). In this work, an ionic liquid (IL) 1-butyl-3-methylimidazole hexafluorophosp...

Mushrooms are subject to bacterial spoilage, browning, senescence, and quality deterioration immediately after harvest. To uncover the impact of the gasotransmitter hydrogen sulfide (H2S) on harvested mushrooms, button mushrooms were treated with H2S, ethylene, and the respective synthesis inhibitor propargylglycine and aminooxyacetic acid (AOA). The results revealed that NaHS (H2S donor) at the concentration of 0.04 mM remarkably prevented the mushroom weight loss, soluble protein, reducing sugar, and bacterial decay. H2S application also deferred enzymatic browning by suppressing polyphenol oxidase activity, and regulating phenol metabolism. Moreover, enzymatic reactive oxygen species scavenging systems, including catalase, glutathione reductase, and superoxide dismutase activities could also be regulated by H2S, postponing postharvest senescence. Moreover, H2S decreased ethylene production by down-regulating ethylene synthesis gene expression and respective enzyme activity. Notably, although the H2S synthesis pathway was distinct to green plants, ethylene treatment efficiently inhibited H2S biosynthesis by down-regulating the AbCBS/AbCSE gene expression levels and enzyme activity, while this trend was mitigated by AOA treatment. These findings suggested that H2S treatment maintained the postharvest quality of mushrooms by regulating senescence process, inhibiting bacterial spoilage, and antagonizing with ethylene.

This study explores the effects of nanomaterials in rice seedlings using carbon 13 (13C)-labelled fullerene (C60). The experiment consisted of three groups, one CK and two nano particle groups with C60: 100 mg L−1 and 20 mg L−1. Mass spectrometry indicated higher 13C abundances in the nano particle groups compared with the CK. The 13C abundances of the 20 mg L−1 group, 100 mg L−1 group and CK were 1.0718%, 1.0715% and 1.0704%, respectively. We analyzed phytohormone concentrations in the rice at harvest time. Decreases in the concentrations of dihydrozeatin riboside (23% and 18% for the 20 mg L−1 and 100 mg L−1 group, respectively), zeatin riboside (23% and 18%, respectively), abscisic acid (11.1% and 12.7%, respectively), brassinolide (12.9% and 13.1%, respectively) and gibberellic acid 4 (12.9% and 13.1%, respectively) were observed compared with the CK. The gibberellic acid 3 concentrations in the 20 mg L−1 and 100 mg L−1 group increased by 12% and 7% compared with the CK, respectively. The methyl jasmonate concentration in the 100 mg L−1 group increased by 19.4% compared with the CK. The concentration of indole-3-acetic acid in the 100 mg L−1 group decreased by 13.5% compared with the CK. There was no change on isopentenyl adenosine concentration. This study indicates that C60 can be absorbed by rice and its effect on the growth of rice via phytohormones, including ABA, IAA, IPA, BR, GA3, GA4, DHZR, ZR and JA-ME. The results showed that, under the treatments of C60 NMs, the contents of some phytohormone in rice were decreased in comparison with CK.

Carbon-based all-inorganic CsPbI2Br perovskite solar cells (C-PSCs) are regarded as a promising photovoltaic candidate due to their low cost, simple device structure, and high stability. However, t...

Effects of CeO2 NPs (200 mg.L−1) on rice (Oryza sativa L.) alone or co-exposure with cadmium (Cd) and salt (sodium chloride, NaCl) were investigated in hydroponic systems for two weeks. Physiological results show that rice biomass was significantly inhibited when NaCl or CdCl2 added alone or in co-exposure treatment. CeO2 NPs significantly relieve the chlorophyll damage under CdCl2 environmental stress. The presence of CeO2 NPs alleviated both stressors induced damages to rice as indicated by the reduced proline level. Additionally, CeO2 NPs triggered the antioxidant defense systems to counteract the oxidative stress caused by NaCl and CdCl2. The level of 8-OHdG, one of the most important indicators for genotoxicity, in rice suggest that the presence of CeO2 NPs reduced the DNA damage in NaCl treated rice. Elemental analysis indicated that co-exposure to NaCl and CdCl2 slightly decreased the Cd content as compared to the one in the CdCl2 alone treatment, and this co-exposure also significantly reduced the Na content when comparing with the NaCl alone treatment. Taken together, our findings suggest that CeO2 NPs could alleviate the CdCl2 and NaCl stresses, but could not completely change the phenotype of both contaminants treated rice.

In this work, a series of three and four-color tandem white organic light-emitting diodes (WOLEDs) are developed by using the optimized charge generating unit (CGU) to connect two electroluminescence (EL) units with symmetrical emitting layers, in which symmetrical emitting layers are constructed based on the mixed hosts; sandwiched between hole and electron-transporting hosts and the light emitted from two EL units that are absolutely complementary for forming white emission. All resulting tandem WOLEDs realize good white emission with maximum color rendering index (CRI) beyond 77 and 90 for three and four-color white devices and extremely high EL spectra stability, and also achieve high device efficiency with maximum external quantum efficiency (EQE) exceeding 33.10%. For example, for the optimized four-color tandem WOLED, the maximum CRI and EQE of 91 and 34.78% are demonstrated and only very slight CIE (Δx, Δy) variation of (0.002, −0.010) was observed at a wide luminance range from 170.9 cd/m2 to 13,870 cd/m2. To the best of our knowledge, this is the first tandem WOLED with only two EL units realizing such high device performances. More importantly, the proposed tandem WOLEDs here avoid introducing carrier or exciton blocking layer or using more EL units to realize high color quality white emission that provides a novel approach to develop simple, but high-performance tandem WOLEDs.

This report investigates the spraying of nano‐silica and fullerene on cucumber leaves to expose their ability to reduce the toxicity and uptake of metal(loid)s. Cucumber seedlings were randomly divided into six treatment groups: 10 mg/L nano‐SiO(2), 20 mg/L nano‐SiO(2), 10 mg/L Fullerene, 20 mg/L Fullerene, 5 mg/L Fullerene + 5 mg/L nano‐SiO(2), and 10 mg/L Fullerene + 10 mg/L nano‐SiO(2). Nano‐silica‐treated plants exhibited evidence of the potential mitigation of metal(loid)s poisoning. Specifically, results showed that 20 mg/L of nano‐silica promoted Cd uptake by plants; comparatively, 10 mg/L of nano‐silica did not significantly increase the silicon content in plants. Both low‐concentration combined treatment and low‐concentration fullerene groups inhibited metal(loid)s uptake by plants. Scanning electron microscopy (SEM) was then used to observe the surface morphology of cucumber leaves. Significant differences were observed on disease resistance in plants across the different nano‐material conditions. Collectively, these findings suggest that both nano‐silica materials and fullerene have the potential to control metal(loid)s toxicity in plants.

Hole transporting material (HTM) free carbon-based perovskite solar cells (C-PSCs) are one kind of promising candidates for new generation photovoltaic technology due to their superior long-term stability and low cost. However, the power conversion efficiency (PCE) of C-PSCs is significantly lower than that of HTM-based PSCs. This is mostly due to the unexpected electron recombination happening at the interface of perovskite/carbon. Moreover, the low conductivity of the carbon electrode slows down the charge collection process and results in a low fill factor and poor PCE. To address these concerns, we firstly inserted an inorganic CuSCN HTM between the perovskite and the carbon electrode to suppress the electron recombination process. Then we used a highly conductive carbon nanotube (CNT) network to form a robust interface of CuSCN/CNT and facilitate the hole collection process. As a result, the updated CuSCN and CNT incorporated C-PSCs exhibit a VOC of 1.01 V and deliver a PCE up to 17.58% (measured in the backward scan) with pretty good reproducibility, which is the highest PCE in C-PSCs. What's more, the incorporation of CuSCN can also improve the stability of devices dramatically. The optimized device shows superior operational stability, retaining over 80% of its initial performance after 1000 h of continuous one sun illumination.

Aviation network nodes have the characteristics of wide area distribution and high dynamics, and the mobile model directly affects the accuracy and reliability of aviation network simulation. In this paper, on the basis of the existing mobile model of Ad-Hoc network, a mobile model of aeronautical self-organizing network based on platform attribute and mission type is proposed. By matching node attributes to mission and mission to mobile model, the relationship between nodes and mobile model is established, and the mobile model adaptation solution for different aircraft platforms in different mission phases is proposed. A UAV mission scenario was constructed to analyze the feasibility of the mobile model.

Wireless aeronautics virtualization enables multiple concurrent wireless aeronautics networks running on the shared wireless network substrate resources. It enhances the resource utilities of spectrum resources, helps for the innovation of physical resources and network services, and improves the QoS guarantee. Resource allocation problem of wireless virtualization, which is how to efficiently assign the physical spectrum resources to several virtual networks, is the primary problem of wireless virtualization. However, the related works generally assume only one physical network, and do not take the economic relationship between infrastructure networks providers (InPs) and service (virtual network) providers (SPs) into consideration. In order to handle this problem, this paper presents a pricing based resource allocation algorithm in wireless aeronautics network virtualization. First, we build up system models under the circumstance of multiple physical networks and multiple virtual networks, and then by using a concave pricing strategy, we present a novel genetic algorithm. Simulation results show our algorithm could provide more revenues for InPs, and show pricing strategy may play an important role on the resource allocation problem in wireless virtualization.

Multi-document summarization (MDS) aims at producing a good-quality summary for several related documents. In this paper, we propose a spectral-based hypothesis, which states that the goodness of summary candidate is closely linked to its so-called spectral impact. Here spectral impact considers the perturbation to the dominant eigenvalue of affinity matrix when dropping the summary candidate from the document cluster. The hypothesis is validated by three theoretical perspectives: semantic scaling, propagation dynamics and matrix perturbation. According to the hypothesis, we formulate the MDS task as the combinatorial optimization of spectral impact and propose an accelerated greedy solution based on a surrogate of spectral impact. The evaluation results on various datasets demonstrate: (1) The performance of the summary candidate is positively correlated with its spectral impact, which accords with our hypothesis; (2) Our spectral-based method has a competitive result as compared to state-of-the-art MDS systems.

In this work, a series of two color white organic light-emitting diodes (WOLEDs) with color rendering index (CRI) exceeding 90 were demonstrated via an ultra-simple novel device structure. The proposed WOLEDs were structured by simply doping exciplex donor of m-MTDATA in the Bepp2 side of bilayer structure TAPC (HTL)/Bepp2 (ETL), where the Bepp2:m-MTDATA layer is away from HTL/ETL interface for a certain distance. And white emission was realized by combining yellow emission of Bepp2:m-MTDATA forming exciplex and blue emission of Bepp2 spacer layer between HTL and Bepp2: m-MTDATA layer. The optimized WOLED exhibits a low driving voltage of 2.7 V, and also achieves the high maximum luminance and power efficiency of 5561 cd/m2 and 11.08 lm/W, and an ultra-high CRI of 93 at a practical luminance of 5000 cd/m2. To the best of our knowledge, the CRI is by far the highest value for two-color WOLEDs with exciplex emission. The detailed working mechanism was unveiled by checking the influence of the thickness of Bepp2 space layer and the mixing ratio and thickness of Bepp2:m-MTDATA layer on the device performance. It was found that in addition to yellow emission, the exciplex emitting layer of Bepp2: m-MTDATA in the proposed devices is also served as a feasible carrier adjusting layer, which was realized by changing its mixing ratio between donor and accepter to affect the distribution of charges, contributing to high CRI white emission.

The unmanned aerial vehicle resources include subsystem resources such as sensors, weapons and communication links, in order to meet the resource scheduling and management requirements of unmanned aerial vehicle, this paper studies the resource scheduling and management mechanism of unmanned aerial vehicles from the aspects of demand analysis, functional framework and operation process. It mainly analyzes the functions and operation flow of unmanned aerial vehicle, including resource adaptation conversion, access control, access control, resource state maintenance, etc., so as to provide references for the packaging and adaptation of unmanned aerial vehicles resources and the design of resource management software.