Since 2020, the national power situation has been very tense. With the national "carbon peak" and "carbon neutral" goals proposed, and the gradual establishment of a green, low-carbon and environmentally friendly economic system, if the future power load of the supercomputing center can be accurately predicted the situation, and according to the power dispatch and regulation, can achieve the purpose of energy saving and emission reduction. Power load forecasting using statistical and artificial intelligence technologies still has a lot of issues today. In order to increase the accuracy and stability of power load adjustment, this research suggests a novel Transformer approach based on the attention mechanism. It establishes a power load analysis and prediction model. This paper can provide the supercomputing center with the load demand situation in the future, and it has important application value for the regional power management department to formulate development plans and effectively manage the load, and is of great significance for responding to the national energy conservation and emission reduction policy.

Load management

10.1117/12.3005110

Cite

Citations (0)

Side-Chain-Promoted Polymer Architecture Enabling Stable Mixed-Halide Perovskite Light-Emitting Diodes

ACS Energy Letters (2024)

Benzheng Lyu Hong Lin Dongyu Li A. A. Sergeev Qiang Wang

Mixed-halide perovskite nanocrystals (PeNCs) featuring bandgap-tunable luminescence with narrow bandwidth have emerged as promising electroluminescent materials for light-emitting diodes (LEDs) to satisfy the color standard of Rec. 2100. However, the phase segregation of mixed-halide perovskites severely restricts the spectral stability and lifetime of perovskite LEDs (PeLEDs). Here, we report that the introduction of multifunctional side-chain-promoted polymer architectures in the synthesis of I/Br-mixed PeNCs to suppress halide segregation and enable electroluminescent stability of the PeLEDs up to ∼2500 min, which is the longest to our knowledge. Meanwhile, the PeLEDs exhibit the pure-red electroluminescence spectrum with Commission Internationale de l'Eclairage coordinates (0.705, 0.292) at one of the highest external quantum efficiencies reported to date, 23.6%. Fundamentally, the as-proposed polymer ligand architecture simultaneously offers long-term nanocrystal dispersion, good charge transport, defect elimination, and phase segregation suppression. Overall, the work demonstrates the potential of the multifunctionalized polymer ligands for developing high-performance PeLEDs toward practical applications.

10.1021/acsenergylett.4c00355

Cite

Citations (5)

Electronic structure of bilayer graphene: A real-space Green’s function study

Physical Review B (2007)

Zhengfei Wang Qunxiang Li Haibin Su Xiaoping Wang Q. W. Shi

In this paper, a real-space analytical expression for the free Green's function (propagator) of bilayer graphene is derived based on the effective-mass approximation. Green's function displays highly spatial anisotropy with threefold rotational symmetry. The calculated local density of states (LDOS) of a perfect bilayer graphene produces the main features of the observed scanning tunneling microscopy (STM) images of graphite at low bias voltage. Some predicted features of the LDOS can be verified by STM measurements. In addition, we also calculate the LDOS of bilayer graphene with vacancies by using the multiple-scattering theory (scatterings are localized around the vacancy of bilayer graphene). We observe that the interference patterns are determined mainly by the intrinsic properties of the propagator and the symmetry of the vacancies.

Bilayer graphene

10.1103/physrevb.75.085424

Cite

Citations (37)

CCDC 818419: Experimental Crystal Structure Determination

The Cambridge Structural Database (2011)

Bo Qin Changliang Ren Ruijuan Ye Chang Sun Khalid Chiad

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

10.5517/ccwgmmk

Cite

Citations (0)

Edge Effects on the Electronic Structures of Chemically Modified Armchair Graphene Nanoribbons

arXiv (Cornell University) (2007)

Hao Ren Qunxiang Li Haibin Su Q. W. Shi Jie Chen

In this paper, we apply the first-principle theory to explore how the electronic structures of armchair graphene nanoribbons (AGNRs) are affected by chemical modifications. The edge addends include H, F, N, NH$_{2}$, and NO$_{2}$. Our theoretical results show that the energy gaps are highly tunable by controlling the widths of AGNRs and addends. The most interesting finding is that N-passivated AGNRs with various widths are metallic due to the unique electronic features of N-N bonds. This property change of AGNRs (from semiconducting to metallic) is important in developing graphene-based devices.

10.48550/arxiv.0711.1700

Cite

Citations (8)

Transplantation and optimization calculation of power inspection image matching application based on the ARM platform

Wei Wei Rundong Gan Xun Li Haibin Su Zhu Zhan

Image matching is an important step in the process of power inspection image stitching and 3D reconstruction, which directly affects the effect of power line image stitching and 3D reconstruction, and is widely used in power line inspection. Traditional power inspection image matching applications are mostly implemented on X86 architecture, but ARM architecture has gradually entered the server field in recent years, showing high efficiency and energy-saving advantages, so it is necessary to transplant power inspection image matching applications to the server platform of ARM architecture. Since the application of image matching is very computation-based, in the process of porting the algorithm to the ARM platform, this paper adopts the Gaussian pyramid algorithm to accelerate the application of image matching through the search method from coarse to fine.

Image stitching

Porting

Pyramid (geometry)

10.1117/12.3006663

Cite

Citations (0)

Moving Object Extraction Algorithm Based on Improved GVF

Junhong Xu Ding Chunfeng Haibin Su Tingling Wang -

Aiming at the shortage of Gradient Vector Flow(GVF),a new moving object extraction algorithm based on improved GVF is proposed.A rectangle limiting the range of target is established by experience and displacement equation.Initial contour according to rectangle range is obtained by rules.The algorithm of GVF is improved,which is used to calculate fine contour.Experimental results in sequence display the algorithm is simple and rapid.

Rectangle

Vector flow

Economic shortage

Limiting

Sequence (biology)

Cite

Citations (1)