Roton-type excitations usually emerge from strong correlations or long-range interactions, as in superfluid helium dipolar ultracold atoms. However, a weakly short-range interacting quantum gas, the recently synthesized spin-orbit (SO) coupling can lead to various unconventional phases of superfluidity and give rise an excitation spectrum roton-maxon character. Using Bragg spectroscopy, we study SO-coupled Bose-Einstein condensate ^{87}Rb atoms show that "magnetized" phase clearly possesses...

Quantum dynamics induced in quenching a d-dimensional topological phase across transition may exhibit nontrivial dynamical pattern on the (d-1)D momentum subspace, called band inversion surfaces (BISs), which have one-to-one correspondence to bulk topology of postquench phase. Here we report experimental observation such bulk-surface through measuring charges 2D quantum anomalous Hall model realized an optical Raman lattice. The system can be quenched with respect every spin axis by suddenly...

Dry cultivation of rice is a water-saving, emission reduction and labor-saving farming method. However, the development under dry hampered by limitations on yield quality. We hypothesized that additional silicon (Si) would be measure to address these or challenges.

A dynamical Hopf insulator is experimentally synthesized with a quenched two-dimensional quantum anomalous Hall system on square Raman lattice. The quench dynamics for the quasimomentum-time-dependent Bloch vectors defines map from $(q_x,q_y,t)\in T^3$ to sphere $S^2$. In this map, number can be defined, and it exactly equals Chern of post-quench Hamiltonian. We measure link between fibers North South Poles $S^2$, which are trajectories in $(q_x,q_y,t)$ space maximal spin polarization,...

In-situ stresses are significantly important for underground mining geotechnical design and coal seam gas management in mines. Aiming at regions with geological structures, this paper proposes an in-situ stress inversion method combining Rhino precise modeling transverse isotropy theory, tests it near the Guodishan fault. The results show that application of transversely isotropic model shows advantages improving accuracy calculation. In addition, based on analysis fault, we believe fault...

The quantum $\tau_2$-model with generic site-dependent inhomogeneity and arbitrary boundary fields is studied via the off-diagonal Bethe Ansatz method. eigenvalues of corresponding transfer matrix are given in terms an inhomogeneous T-Q relation, which based on operator product identities among fused matrices asymptotic behavior matrices. Moreover, associated equations also obtained.

As a key issue in EVs (Electric Vehicles) development, Li-ion battery's thermal safety is focused on which the abuse model an important tool. This paper has established 3-D electro-thermal taking side reaction into account, order to study MGL100Ah lithium manganite issue. firstly states mechanism of heat generation, types model, and mesh then analyzes simulation under short circuit condition, one condition. On hand, verifies liability so as apply other condition future; discusses detail...

In many mining areas, there is a lot of pressed coal under buildings, railways, and water bodies, are geological conditions thick unconsolidated layers, so the surface subsidence has certain particularity. The key to solve problem control technology subsidence. development strip filling provides kind economical effective technology. With passage time, natural weathering, flow, fracture some pillars may lead instability failure pillars. Therefore, selection parameters plays an important role...

We study the exact solutions of quantum integrable model associated with $C_n$ Lie algebra, either a periodic or an open one off-diagonal boundary reflections, by generalizing nested Bethe ansatz method. Taking $C_3$ as example we demonstrate how generalized method works. give fusion structures and provide way to close processes. Based on resulted operator product identities among fused transfer matrices some necessary additional constraints such asymptotic behaviors relations at special...

Abstract The formation and development of faults are a manifestation stress concentrations energy release in crustal rocks, have great influence on the occurrence dynamic mine disasters. This study proposed mapping technology as fault identification method. procedure included four steps: (1) Drawing points topographic maps. information maps, such elevation, rivers, lakes was copied onto sulfuric acid paper. (2) Classifying landform. Based highest lowest studied area, minimum elevation...

Abstract Aiming at the technical problems of frequent dynamic pressure disturbance regenerated roof and roadway stability control in process forming large-section support return channel under delamination mining, taking 1200-2 fully mechanized caving face Baiyinhua No. 4 Mine as engineering background, numerical simulation theoretical analysis were adopted. The overburden structure lower stratified loading characteristics after expansion are analyzed, breaking forms limiting conditions...

Steel used in the automotive industry requires a favorable combination of strength and ductility to maintain structural integrity automobiles achieve complex shapes. Traditional approaches weight reduction from high-strength low-carbon steels have several limitations. Therefore, novel dual-phase lightweight steel with austenite-ferrite structure composition (mass fraction, %) Fe-0.52C-11Mn-5.14Al-1Cr was designed. The relationship between microstructure mechanical properties under different...

Deep learning framework for austenitic ferrite segmentation using electron microscope images. Preprocessing and data enhancement enable accurate grain detection in Fe–C–Mn–Al alloys with a novel quantification method.

This paper proposed a crime busting model with two dynamic ranking algorithms to detect the likelihood of suspect and possibility leader in complex social network. Signally, order obtain priority list suspects, an advanced network mining approach cumulative nominating algorithm is adopted rapidly reduce computational expensiveness than most other topology-based approaches. Our method can also greatly increase accuracy solution enhancement semantic learning filtering at same time. Moreover,...

The generic quantum τ 2-model (also known as Baxter-Bazhanov-Stroganov (BBS) model) with periodic boundary condition is studied via the off-diagonal Bethe Ansatz method. eigenvalues of corresponding transfer matrix (solutions recursive functional relations in j -hierarchy) site-dependent inhomogeneity parameters are given terms an inhomogeneous T − Q relation polynomial Q-functions. associated equations obtained. Numerical solutions for small number sites indicate that does indeed give...

Usually, on-chip beam splitting can be achieved by manipulating the in-plane iso-frequency curves (IFCs) of structure, where confinement light along out-of-plane direction is governed total internal reflection. In this Letter, without needing a high-index dielectric background material for reflection, we achieve in linear-crossing metamaterial (LCMM) mimicked two-dimensional photonic crystal (PhC) slab vertical enabled bound state continuum (BIC) and totally beyond cone. Particularly,...

The small polaron, an one-dimensional lattice model of interacting spinless fermions, with generic non-diagonal boundary terms is studied by the off-diagonal Bethe ansatz method. presence Grassmann valued fields gives rise to a typical $U(1)$-symmetry-broken fermionic model. exact spectra Hamiltonian and associated equations are derived constructing inhomogeneous $T-Q$ relation.

Abstract In response to the frequent disturbance of dynamic pressure regenerated roof and technical problems controlling stability roadway in process forming a large cross-section support withdrawal channel during expansion layered fully mechanized caving working face under mining, taking 1200-2 Baiyinhua No.4 Mine as engineering background,analyzed load characteristics overlying rock structure top plate retractable passage after lower coal face, studied combined scheme anchor rod, metal...

Computer applications in process control of construction quality can make a high efficiency and accuracy. The paper brings up two methods to achieve optimization quality, set digitalized information transfer system responsibility distribution each party the project solve problem time, visualized software builders easier more efficiently.