Efficient transmission-type meta-holograms have been demonstrated using high-index dielectric nanostructures based on Huygens' principle. It is crucial that the geometry size of building blocks be judiciously optimized individually for spectral overlap electric and magnetic dipoles. In contrast, reflection-type metal/insulator/metal scheme geometric phase can readily achieved with high efficiency small thickness. Here, we demonstrate a general platform design dual resonance silicon are...

We nonperturbatively investigate the ground state magnetic properties of 2D half-filled SU($2N$) Hubbard model in square lattice by using projector determinant quantum Monte Carlo simulations combined with method local pinning fields. Long-range N\'eel orders are found for both SU(4) and SU(6) cases at small intermediate values $U$. In cases, long-range moments exhibit nonmonotonic behavior respect to $U$, which first grow then drop as $U$ increases. This result is fundamentally different...

The interplay between charge and spin degrees of freedom in strongly correlated fermionic systems, particular Dirac fermions, is a long-standing problem condensed matter physics. We investigate the competing orders half-filled $\mathrm{SU}(2N)$ Hubbard model on honeycomb lattice, which can be accurately realized optical lattices with ultracold large-spin alkaline-earth fermions. Employing large-scale projector determinant quantum Monte Carlo simulations, we have explored phase transitions...

Filtering Facepiece Respirator (FFR) is the most common respirator users in health care environment utilize for personal protection from outside particles. Comfort and fit are important while wearing an FFR. This paper proposes a novel technology to produce customized face seal design improving comfort of FFR wearers. In order customize seals, we scanned faces three subjects using three-dimensional (3D) laser scanning method. A 3M 8210 N95 each headform was designed reverse engineering...

The existence of degenerate or gapless edge states is a characteristic feature topological insulators, but difficult to detect in the presence interactions. We propose new method obtain degeneracy from perspective entanglement entropy, which very useful identify interacting states. Employing determinant quantum Monte Carlo technique, we investigate interaction effect on two representative models fermionic insulators one and dimensions, respectively. In topologically nontrivial phases,...

Colour preference is a critical dimension for describing the colour quality of lighting and numerous metrics have been proposed. However, due to variation amongst psychophysical studies, consensus has not reached on best approach quantify preference. In this study, 25 typical were comprehensively tested based 39 groups data from 19 published visual studies. The experimental results showed that two combined metrics: arithmetic mean gamut area index (GAI) rendering (CRI) (CQI), combination...

Room temperature vulcanized (RTV) silicone rubber is extensively used in power system due to its hydrophobicity and transfer ability. Temperature has been proven markedly affect the performance of rubbers. This research investigated degradation RTV under cycling treatment. Hydrophobicity ability, hardness, functional groups, microscopic appearance, thermal stability were analyzed using static contact angle method, a Shore A durometer, Fourier transform infrared spectroscopy (FTIR), scanning...

We have systematically studied the thermodynamic properties of a two-dimensional half-filled $\mathrm{SU}(2N)$ Hubbard model on square lattice by using determinant quantum Monte Carlo method. The entropy-temperature relation, isoentropy curve, and probability distribution on-site occupation number are calculated in both SU(4) SU(6) cases, which exhibit prominent features Pomeranchuk effect. analyze these behaviors based energy scales density spin channels. In channel, interaction strength...

Fatty acid esters of hydroxy fatty acids (FAHFAs) are a family recently discovered lipids with important physiological functions in mammals and plants. However, low detection sensitivity negative ionization mode mass spectrometry makes low-abundance FAHFA challenging to analyze. A 2-dimethylaminoethylamine (DMED) based chemical derivatization strategy was reported improve the MS FAHFAs by labeling positively ionizable tertiary amine group. To facilitate reliable, high-throughput, automatic...

A series of psychophysical experiments have been conducted to investigate the effect light sources on color appearance Chinese bronzeware. Three groups 30 observers were asked evaluate a set bronzeware under different in three paired-comparison experiments—one group for each experiment. The visual attributes preference , comfort discrimination and antiquity scaled. panel seven 3000 K, with Duv values ranging from <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline">...

Breakdown characteristics of air gaps under negative switching impulse are complicated. To better understand the nonlinear discharge long gaps, 50% breakdown rod-rod rod-plane and rod-conductor with gap distance ranged from 1 m to 10 m, studied thoroughly, two waveforms surges. Saturating have been obtained for above three typical gaps. For exceed 4 voltage appears be lower than that while average electric field decreases length Gap factors impulses tend level off spacing. Furthermore, new...

// Jiali Zhang 1, 2, * , Yu Wang 2 Xinming Chen Yi Zhou 1 Fangyan Jiang Jirong Li Wen-Feng The State Key Laboratory Breeding Base of Basic Science Stomatology (Hubei_MOST) & Oral Biomedicine Ministry Education, School Hospital Stomatology, Wuhan University, Wuhan, China Histopathology Department, and These authors have contributed equally to this work Correspondence to: Zhang, e-mail: jiali_zhang97@163.com Chen, xmchen3011@163.com zhangwf59@163.com Keywords: Head neck squamous cell...

Abstract An on‐surface bimolecular system is described, comprising a simple divalent bis(imidazolyl) molecule that shown to “walk” at room temperature via an inchworm mechanism along specific pathway terminated each end by oligomeric “fences” constructed on monocrystalline copper surface. Scanning tunneling microscopy shows the motion of walker occurs [1 $\bar 1$ 0] direction Cu surface with remarkably high selectivity and effectively confined orthogonal construction covalent porphyrin...

// Jing Luo 1, * , Xin-Xia Feng 2, Chao 1 Yu Wang Dong Li Shu Shan-Shan Jian Qin Yong-Chao Jiu-Ming Zou De-An Tian 2 Gui-Mei Zhang Zuo-Hua Department of Biochemistry and Molecular Biology, School Basic Medicine, Wuhan 430030, People's Republic China Tongji Hospital, Medical College, Huazhong University Science Technology, These authors contributed equally to this work Correspondence to: Feng, email: fengzhg_tj@163.com Zhang, zhanggm58@163.com Keywords: neutrophils, recruitment, metastases,...

It is significant to reveal the characteristics of voltage waveform porcelain insulator with heavy industry pollution in flashover test. In this study, contamination samples came from areas was measured. The and leakage current signals test were recorded completely. A parameter, Uw, formed by summing variation slope peaks on each power frequency cycle. quantified fluctuant accumulation signal waveform. Another Kfv, calculating drop at flashover. analyzed that effects severity contaminant...

With the development of Vehicular Ad hoc Networks (VANETs), security threats to communication VANETs are also increasing. Misbehaviors including fake messages attacks, characterized by containing misleading traffic information will significantly interfere with cooperation between vehicles, and reduce message transmission service capabilities VANETs. Therefore, it is necessary propose an effective misbehavior detection scheme ensure reliable In addition considering dynamic network topology...

A numerical simulation method of negative direct current (DC) corona discharge based on a plasma chemical model is presented, and coaxial cylindrical gap adopted. There were 15 particle species 61 kinds collision reactions electrons involved, 22 between ions are considered in reactions. Based this method, continuous Trichel pulses calculated about 100 us timescale, microcosmic physicochemical process DC three different periods discussed. The obtained results show that the amplitude 1–2 mA,...

The interaction effects in ultracold Fermi gases with SU(N) symmetry are studied nonperturbatively half filled one-dimensional lattices by employing quantum Monte Carlo simulations. We find that, as N increases, weak and strong interacting systems driven to a crossover region, but from opposite directions convergence of itinerancy Mottness. In the particles nearly itinerant, interparticle collisions enhanced N, resulting amplification effects. contrast, coupling increasing softens...

Previous research has confirmed the harmful effects of cyber-ostracism on adolescents. However, that investigated effect adolescents’ psychological well-being and underlying mechanisms this influence remains scarce. Using a sample 421 Chinese adolescents, study examined short-term well-being, along with mediating rumination. Mindfulness is considered as moderator influencing mechanism. Questionnaires regarding cyber-ostracism, rumination, mindfulness were administered at beginning spring...

In China, the average elevation of Yunnan Province exceeds 2000 m, with a greatly fluctuating terrain. Most areas have high-altitude mountainous terrain and relatively high ground lightning activity. Topography is one most critical factors affecting regional characteristics. Therefore, clarifying quantitative relationship between cloud-to-ground activity topography can help evaluate risk hazard-pregnant environments adopt active protective measures. this study, we used mathematical...

Dynamic resistance measurement (DRM) was proved to be an important method for condition assessment of contact sets SF6 circuit breakers (CBs). The erosion due arc energy is a main factor that influences the electrical lifetime extinguishing chamber. In this study, high-voltage CB synthetic used produce fault current tests on sets. were close end their service life after series tests. DRMs with DC amperages 0.5, 1.0, and 1.5 kA conducted two tested in interval each test. Five essential...

Abstract The blades of a wind turbine rotate during normal operation. To investigate the influence blade rotation on lightning‐attracting ability turbine, discharge test platform is designed for scaled turbines. 50% impulse voltages and flash probabilities turbines with gap distances 1 to 8 m in static rotary conditions are determined by using selective test. single 2 indicates that breakdown between electrodes increases an increase speed. However, distance 4 voltage fan decreases results...

In order to evaluate the ablation state of SF6 circuit breaker contacts, simulated tests were carried out on breaker, and dynamic resistance curve as a function contact travel was measured with three levels injected current. The results showed that increasing test current value can reduce fluctuation travel. addition effect current, loosening operating mechanism will affect accuracy opening closing action contact, resulting in continuous reduction main Based measurement results, BP neural...