Zhejiang University of Science and Technology

As a cloud storage side in the cloud-edge-terminal collaboration, which empowers the artificial intelligence of things (AIoT), the accuracy of data retrieval and data privacy in the cloud can significantly impact the quality of service in AIoT. Typically, the cloud facilitates data sharing through keyword-based private information retrieval (PIR). However, these keywords may contain the privacy of patients, causing the server to gain patients privacy during database retrieval, resulting in privacy exposure. Concurrently, malicious users seek to access more datasets than those corresponding to the keywords. It is worth to consider the construction of a secure and private retrieval system in AIoT. To protect the privacy of AIoT, this paper proposes two multi-keyword PIR schemes: the fuzzy multi-keyword PIR scheme and the fine-grained flexible multi-keyword PIR scheme. The fuzzy multi-keyword PIR scheme utilizes the proposed batch oblivious pseudo-random function (B-OPRF) based on OTEn1 to implement the batch search. If one of the n keywords in a dataset matches a requested keyword, the corresponding datasets are returned to the user, achieving fuzzy retrieval. The fine-grained flexible multi-keyword PIR scheme incorporates the proposed batch flexible OPRF (BF-OPRF) algorithm, wherein k out of the n keywords in the dataset must match the k requested keywords from users for the corresponding datasets to be returned to the user. Additionally, the cloud server may tamper with the data, and the correctness of the data is periodically verified using a verifiable mechanism. The effectiveness and performance of the proposed schemes are validated through experiments and theoretical analysis.

In digital holographic microscopy (DHM), achieving large field of view (FOV) imaging while maintaining high resolution is critical for quantitative phase measurements of biological cell tissues and micro-nano structures. We present a quantitative phase image stitching guided by reconstructed intensity images in one-shot double FOV multiplexed DHM. Double FOVs are recorded simultaneously through frequency division multiplexing; intensity feature pairs are accurately extracted by multi-algorithm fusion; aberrations and non-common baselines are effectively corrected by preprocessing. Experimental results show that even if phase images have coherent noise, complex aberrations, low overlap rate and large size, this method can achieve high-quality phase stitching.

In this paper, we first establish a refinement of the coefficient inequality for subordinate functions on the unit disc \(\mathbb{U}\) in \(\mathbb{C}\). Next, as applications of this inequality, we will obtain some refinements of the Fekete and Szegő inequalities for a class of holomorphic mappings associated with starlike mappings and quasi-convex mappings of type B on the unit ball \(\mathbb{B}\) of a complex Banach space. The results presented here would generalize and improve some recent works of several authors [12, 20, 23].

Ethnic clothing, blending historical and contemporary influences, showcased a complex color artistry, inspiring modern design. In this study, image analysis was applied to dissect the color palette of She ethnic costumes, examining 250 images categorized into upper apparel, lower attire, and accessories. Techniques including color correction, cluster-based color extraction, and an enhanced Apriori algorithm were utilized to analyze color variations across different costume types and to establish definitive Colour combinations. The research revealed only minor differences in color usage among the categories. However, it was noted that binary color pairings in accessories and ternary combinations in lower garments displayed a rich diversity of color schemes. The application of a 0.2 minimum support threshold in the algorithm effectively distinguished regional color patterns. The algorithm's swift processing time of 0.032 s demonstrated its effectiveness in rapidly analyzing complex color relationships.This study deepened the understanding of the intricacies in color aesthetics of ethnic costumes, offering fresh perspectives for innovative design.

Skin aging is a systematic and complex process, mainly including intrinsic aging caused by time change and extrinsic aging caused by environmental factors. Photoaging caused by ultraviolet (UV) irradiation is the principle extrinsic factor of skin aging, which can directly or indirectly cause damage to DNA and other biomolecules, generate reactive oxygen species (ROS), and induce a decrease in collagen synthesis and other adverse effect. Herein, to address the causative factors and multiple side effects of skin photoaging, we constructed multifunctional peptide-melanin hybrid nanodots (PMHDs) to achieve multifaceted synergistic anti-skin aging by using melanin-like nanodots (MDs) and functional peptides as active motifs. Among them, the peptide has the activity of promoting collagen synthesis, while the MDs have the function of absorbing UV light and scavenging free radicals. Additionally, the MDs also act as a carrier to increase the cellular uptake of the peptide. The anti-photoaging effects of the PMHDs were systematically verified in a multidimensional manner at the biochemical, cellular and small animal levels, respectively.

Plasmonic nanomaterials with multiple components and designed structures show diverse properties and functions owing to the synergistic effects of the different components. Engineering the compositional and structural complexity of plasmonic nanomaterials is a powerful technique for expanding their range of applications. A facile approach to an unprecedented dart‐like type of nanostructure with AgPd bimetal selectively deposited at one end of Au nanobipyramids, forming AgPd nanodarts, is reported here. The synthetic process involves both galvanic replacement and Ostwald ripening. The morphological evolution of the AgPd nanodarts is thoroughly investigated and the growth mechanism is put forward. The as‐obtained AgPd nanodarts exhibit an outstanding photothermal conversion efficiency and peroxidase activity, which make them powerful for photothermally–catalytically combined tumor organoid ablation. In addition, two types of AgPd nanodart‐derived single‐end nanostructures, AgPd@ZIF‐8, and AgPd@TiO2 nanodarts, are prepared for the first time. The ZIF‐8 and TiO2 shell are preferentially coated at the AgPd end of the AgPd nanodarts, respectively. Both AgPd@ZIF‐8 and AgPd@TiO2 nanodarts show superior antimicrobial activities. The protocol and concept of modulating the structure of the nanodarts in this work can be extended to the development of a new class of plasmonic nanostructures with multifunctionalities.

This paper comprehensively evaluated the effect of solution pH and alternating current (AC) on the corrosion behavior of CoCrFeMnNi high-entropy alloy (HEA) in simulated concrete pore solution. The results indicate that increased solution pH markedly enhances the corrosion rate of the HEA and the number and size of pits as well as more flaws are produced inside its thinned passive film, which suggests that the anti-corrosion property of the HEA is reduced. Under strong solution alkalinity, the rough passive film on the HEA is uneven and unstable, which significantly weakens the protection of the film. As iAC augments, more oxygen vacancies are generated to absorb anions in test solution and Ep shifts negatively, which decreases the stability of passive film and promotes the pitting sensitivity. Moreover, the synergistic influence of pH value and AC density reflected by a remarkable increase of ip facilitates the dissolution of passive film and declines the corrosion resistance of the HEA, which may be due to the reason that increased AC interference produces more OH- ions.

Objectives This study aimed to discuss the essential amino acid residues and catalytic mechanism of trans-epoxysuccinate hydrolase from Pseudomonas koreensis for the production of meso-tartaric acid. Results The optimum conditions of the enzyme were 45 °C and pH 9.0, respectively. It was strongly inhibited by Zn²⁺, Mn²⁺ and SDS. Michaelis–Menten enzyme kinetics analysis gave a Km value of 3.50 mM and a kcat of 99.75 s⁻¹, with an exceptional EE value exceeding 99.9%. Multiple sequence alignment and homology modeling revealed that the enzyme belonged to MhpC superfamily and possessed a typical α/β hydrolase folding structure. Site-directed mutagenesis indicated H34, D104, R105, R108, D128, Y147, H149, W150, Y211, and H272 were important catalytic residues. The ¹⁸O-labeling study suggested the enzyme acted via two-step catalytic mechanism. Conclusions The structure and catalytic mechanism of trans-epoxysuccinate hydrolase were first reported. Ten residues were critical for its catalysis and a two-step mechanism by an Asp-His-Asp catalytic triad was proposed.

This study establishes a numerical model for beam-type steel–concrete composite specimens considering the corrosion of anchor bolts, with which studies the long-term deformation performance of the components under sustained load. The experimental results were compared with the calculated values obtained by combining the effective modulus method according to the CEB-FIP 1990 code and the ACI 209R code. Then a comparison with the calculation method of shrinkage and creep in standards (Standard Creep Method (SCM)) is made, and it shows that by supplementing the degradation of interface stiffness due to corrosion (using the defined modulus method (DMM)), the simulation results match better with the experimental results, confirming that this approach is suitable for analyzing the long-term load conditions of anchor bolt corrosion. Furthermore, based on the defined modulus method, the long-term behavior of composite beams under different loads and varying corrosion rates is studied.

Dye analysis is an important subject in historical textile research because it helps researchers understand the structural and chemical features of colorants and provides a solid base to determine the date, provenance, and trade of textile artifacts. This study is the first investigation of dyes used in historical silk of Indonesia using high-performance liquid chromatography coupled with a diode array detector and mass spectrometry (HPLC-DAD-MS). Three Indonesian silk textiles dating from the nineteenth (19th) and twentieth (20th) centuries are selected from the Southeast Asian textile collection of the China National Silk Museum. Dyes are extracted from the representative silk threads of these artifacts and subjected to chromatographic analysis. The characterization results indicated the use of a variety of natural dyes in the studied threads. In particular, madder dye (Rubia spp.), lac dye (Laccifer lacca Kerr.), and Morindone dye (Morinda citrifolia L.) were used for producing red shades, while green yarns were dyed by a combination of indigo and safflower (Carthamus tinctorius L.) yellow dyes. Furthermore, this study provides the first proposal of the use of saffron (Crocus sativus L.) dye in Indonesian textile dyeing during this period. In addition, Congo Red (C.I. 22,120), Orange I (C.I. 14,600), and Diamond Green B (C.I. 42,000) were identified, signifying the adoption of early synthetic dyes by Indonesian dyers. The current work takes advantage of the sensitivity and reliability of the HPLC-DAD-MS technique in dye analysis in order to give a report on the chemical aspects of coloring materials used in Southeast Asian textiles in the 19th and 20th centuries.

The distribution of density of states (DOS) holds fundamental importance in determining charge transport within organic field–effect transistors (OFETs). Herein, the modulation of DOS distribution in OFET devices is demonstrated by altering the chain conformation of the polymer dielectrics. A rapid film‐formation technique, specifically the spin‐casting method, is used to fabricate the dielectric layer using poly(methyl methacrylate) (PMMA). This method allows for the retention of some memory of the chain conformations from the solution to the resulting dry film. This memory effect is employed to prepare thin PMMA films with different local chain conformations by adjusting the quality of the solvent. Good solvent forms solidified films with a reduced amount of gauche conformer in the PMMA chain, resulting in a narrow DOS distribution width. Consequently, the device exhibited enhanced charge mobility and a reduced subthreshold swing. The observed change in the width of the DOS distribution can be attributed to the alteration of the local energy state of the semiconductor, induced by the local chain conformation of PMMA dielectrics through electrostatics and steric interactions.

In this work, the corn straw (CS) with concentrations of 3%, 6%, and 9% (w/v) were pretreated by rumen fluid (RF) and then used for batched mesophilic biogas production. The results showed that after a 6-day pretreatment, volatile fatty acid (VFAs) production of 3.78, 8.27, and 10.4 g/L could be found in 3%, 6%, and 9%, respectively. When concerning with biogas production, the highest accumulative methane production of 149.1 mL CH4/g volatile solid was achieved by 6% pretreated CS, which was 22% and 45% higher than 3% and 9%, respectively. Also, it was 3.6 times higher than the same concentration of unpretreated CS. The results of the microbial community structure analysis revealed that the 6% CS pretreatment not only maintained a microbial community with the highest richness and diversity, but also exhibited the highest relative abundance of Firmicutes (45%) and Euryarchaeota (3.9%). This high abundance was conducive to its elevated production of VFAs and methane. These findings provide scientific reference for the utilization of CS and support the development of agricultural waste resource utilization and environmental protection.

Vanadium dioxide (VO2) with the advantages of high theoretical capacity and tunnel structure has attracted considerable promising candidates for aqueous zinc-ion batteries. Nevertheless, the intrinsic low electronic conductivity of VO2 results in an unsatisfactory electrochemical performance. Herein, a flower-like VO2/carbon nanotubes (CNTs) composite was obtained by a facile hydrothermal method. The unique flower-like morphology shortens the ion transport length and facilitates electrolyte infiltration. Meanwhile, the CNT conductive networks is in favor of fast electron transfer. A highly reversible zinc storage mechanism was revealed by ex-situ X-ray diffraction and X-ray photoelectron spectroscopy. As a result, the VO2/CNTs cathode exhibits a high reversible capacity (410 mAh·g−1), superior rate performance (305 mAh·g−1 at 5 A·g−1), and excellent cycling stability (a reversible capacity of 221 mAh·g−1 was maintained even after 2000 cycles). This work provides a guide for the design of high-performance cathode materials for aqueous zinc metal batteries.

Let Ω\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\Omega $$\end{document} be a homogeneous function of degree zero, have vanishing moment of order one on the unit sphere Sd-1\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\mathbb {S}^{d-1}$$\end{document}(d≥2\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$d\ge 2$$\end{document}). In this paper, our object of investigation is the following rough non-standard singular integral operator TΩ,Af(x)=p.v.∫RdΩ(x-y)|x-y|d+1(A(x)-A(y)-∇A(y)(x-y))f(y)dy,\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\begin{aligned} T_{\Omega ,\,A}f(x)=\mathrm{p.\,v.}\int _{{\mathbb {R}}^d}\frac{\Omega (x-y)}{|x-y|^{d+1}}\big (A(x)-A(y)-\nabla A(y)(x-y)\big )f(y)\textrm{d}y, \end{aligned}$$\end{document}where A is a function defined on Rd\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\mathbb {R}}^d$$\end{document} with derivatives of order one in BMO(Rd)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\textrm{BMO}}({\mathbb {R}}^d)$$\end{document}. We show that TΩ,A\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$T_{\Omega ,\,A}$$\end{document} enjoys the endpoint LlogL\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$L\log L$$\end{document} type estimate and is Lp\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$L^p$$\end{document} bounded if Ω∈L(logL)2(Sd-1)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\Omega \in L(\log L)^{2}({\mathbb {S}}^{d-1})$$\end{document}. These results essentially improve the previous known results given by Hofmann (Stud Math 109:105–131, 1994) for the Lp\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$L^p$$\end{document} boundedness of TΩ,A\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$T_{\Omega ,\,A}$$\end{document} under the condition Ω∈Lq(Sd-1)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\Omega \in L^{q}({\mathbb {S}}^{d-1})$$\end{document}(q>1)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$(q>1)$$\end{document}, Hu and Yang (Bull Lond Math Soc 35:759–769, 2003) for the endpoint weak LlogL\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$L\log L$$\end{document} type estimates when Ω∈Lipα(Sd-1)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\Omega \in \textrm{Lip}_{\alpha }({\mathbb {S}}^{d-1})$$\end{document} for some α∈(0,1]\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\alpha \in (0,\,1]$$\end{document}.

Khmelnitskaya and Yanovskaya (Math Methods Oper Res 66(2):255–261, 2007) characterized the Owen value for TU games with a coalition structure by the axioms of efficiency, marginality, symmetry across coalitions and symmetry within coalitions. Symmetry across components requires that components with equally productive in the game between components obtain the same total payoffs of their members. In this note, inspired by Casajus (Econ Lett 169:59–62, 2018), we weaken the symmetry across components to the sign symmetry across components, which requires only that equally productive components obtain the same sign of total payoffs. We extend the Khmelnitskaya-Yanovskaya’s characterization by using efficiency, marginality, sign symmetry across coalitions, and sign symmetry within coalitions, similarly as it was done by Casajus (Econ Lett 169:59–62, 2018) for the Shapley value for general TU games. At last, we extend the main result to the Winter value for games with level structure

Background The current understanding to the mechanism of rumen development is limited. We hypothesized that the Hippo signaling pathway controlled the proliferation of rumen epithelium (RE) during postnatal development. In the present study, we firstly tested the changes of the Hippo signaling pathway in the RE during an early growing period from d5 to d25, and then we expanded the time range to the whole preweaning period (d10-38) and one week post weaning (d45). An in vitro experiment was also carried out to verify the function of Hippo signaling pathway during RE cell proliferation. Results In the RE of lambs from d5 to d25, the expression of baculoviral IAP repeat containing (BIRC3/5) was increased, while the expressions of large tumor suppressor kinase 2 (LATS2), TEA domain transcription factor 3 (TEAD3), axin 1 (AXIN1), and MYC proto-oncogene (MYC) were decreased with rumen growth. From d10 to d38, the RE expressions of BIRC3/5 were increased, while the expressions of LATS2 and MYC were decreased, which were similar with the changes in RE from d5 to d25. From d38 to d45, different changes were observed, with the expressions of LATS1/2, MOB kinase activator 1B (MOB1B), and TEAD1 increased, while the expressions of MST1 and BIRC5 decreased. Correlation analysis showed that during the preweaning period, the RE expressions of BIRC3/5 were positively correlated with rumen development variables, while LAST2 was negatively correlated with rumen development variables. The in vitro experiment validated the changes of LATS2 and BIRC3/5 in the proliferating RE cells, which supported their roles in RE proliferation during preweaning period. Conclusions Our results suggest that the LATS2-YAP1-BIRC3/5 axis participates in the RE cell proliferation and promotes rumen growth during the preweaning period.