Accurate short-term wind power forecasting (WPF) plays a crucial role in grid scheduling and accommodation. Numerical weather prediction (NWP) speed is the fundamental data for WPF. At present, reducing NWP forecast errors contributes to improving accuracy of WPF from perspective quality. In this article, variational mode decomposition combined with bidirectional gated recurrent unit (VMD-BGRU) method correction XGBoost model are proposed. First, several sub-series divided by VMD obtain more...

Abstract This paper provides an analysis of China’s land border cultural heritage, aiming to offer guidance for its protection and development. The study compiled a comprehensive database heritage sites analyzed their mathematical characteristics based on quantity, type, quality. spatial pattern the was described using kernel density analysis, variability, correlation, while driving mechanism measured Geo-Detector model. findings revealed that areas China have total 1227 comprising two main...

Cultural heritage resources represent a vital aspect of tourism in the Ningxia Hui Autonomous Region, an area characterized by its ethnic minority heritage. This study innovatively proposes classification framework for cultural based on principles protection and demands development. For first time, it combines kernel density analysis spatial autocorrelation methods to conduct quantitative geographical distribution Ningxia, covering aspects such as scale, structure, characteristics,...

This study aims to explore the coupled and coordinated development of tourism urbanization ecological environment in China’s coastal cities. By constructing an index system for environment, this research evaluates spatiotemporal characteristics changes, as well their coupling coordination levels cities from 2010 2019. The results are follows: (1) From 2019, level urbanization, conditions, degree were all superior those non-tourism (2) During period showed upward trend, exhibited significant...

Co-encapsulated xanthoxylin (GX-50) and vitamin C (Vc) microcapsules (GX-50-Vc-M) were prepared by the combination of a water-in-oil-in-water (W1/O/W2) double emulsion with complex coacervation. The W1/O/W2 was two-step emulsification, it has uniform particle size 8.388 μm high encapsulation efficiencies GX-50 (85.95%) Vc (67.35%) under optimized process conditions. Complex coacervation occurs at pHs 4.0-4.7, which highest efficiency pH 4.5. coacervate tannic acid solidifying (namely, wet...

The assessment of suitability is the cornerstone for development ecotourism in nature reserves. This paper adopts Delphi method to invite 30 experts score and screen a series indicators then calculates weight each indicator through hierarchical analysis (AHP) establish comprehensive evaluation index system development. AHP includes four constraints layers (tourism resources, socio-economic environment, ecological conditions, tourism market), addition eleven element thirty-eight indicators....

N-(4-Hydroxy-phenoxyethyl)-N′-ethyl-4,4′-bipyridium (1) can form a stable 1 : inclusion complex with CB[8] in aqueous solution, which the hydroxyphenol (HP) moiety is back-folded and inserted together viologen into cavity of CB[8]. When ethyl dication (EV2+) reduced, chemically or electrochemically, an intramolecular partner radical (EV+˙-HP)/CB[8] be detected, meanwhile, dynamic balance between intermolecular dimer (EV+˙-HP)2/CB[8] observed.

As part of the cultural landscape, administrative toponyms do not only reflect natural and sociocultural phenomena, but also help with related management naming work. Historically, county-level districts have been stable basic regions in China, playing a role country's management. We explore spatio-temporal evolutionary characteristics landscape China's eastern plains areas. A Geographical Information System (GIS) analysis, Geo-Informatic Tupu, Kernel Density Estimation, correlation...

The scientific evaluation of tourism resources provides the basic conditions for rational development and utilization resources, which is significant sustainable tourism. On basis obtaining a large sample resource data, this study constructed an index system regional from four aspects: quantity, type, grade, combination taking township scale as spatial unit. weighting method was used to evaluate grade in each township, hierarchical clustering autocorrelation were analyze patterns values....

As a combination of toponym and cultural heritage with rich connotation toponymic word-culture entity-culture, has the significance protection inheritance. It is important for transmitting culture expanding connotations tourism activities. Previous analyses such exploitation mostly concentrated on resource value from an internal perspective, researches focused words while paying less attention to entities, neglecting influence environmental condition. This study selected ecologically...

Background The comprehensive quantitative and comparative risk data of drug-induced erectile dysfunction (ED) are still lacking, this study aims to supplement information.

The ferrocenylimines of general formula [(η5-C5H5)Fe(η5-C5H4)-CH2N═CH-C(R)═CH-C6H5] with R = H (2a) and CH3 (2b) were conveniently prepared from ferrocenylmethylamine. Reaction 2a,b lithium tetrachloropalladate in methanol the presence anhydrous sodium acetate resulted formation di-μ-chloro-bridged heteroannular cyclopalladated complexes 3a,b via unsubstituted ferrocenyl C–H bond activation related ligands. Treatment triphenylphosphine gave Pd{[(η5-C5H4)Fe(η5-C5H4)CH2N═CH-CH═CH-C6H5]}ClPPh3...

As a part of cultural landscapes, toponyms with abundant connotations and long history are valuable heritage assets. Choronyms not only reflect natural social phenomena but also help relevant management naming work. In order to explore the historical development sequence choronymic landscape evolution, we analyze spatial–temporal pattern variation, spatial association, semantic evolution landscapes since Qin dynasty. We adopt sequent snapshot model an event-based state amendment establish...

Tourism resources are the basic materials of tourism development, and they also provide support for regional spatial competition. The development depends on degree to which utilized, it is great guiding significance their utilization study structure. Based a large sample data resources, starting from characteristics multi-type, multi-level multi-combination, this paper puts forward framework method analyzing structure resources. Taking Hainan Island as an example, describes in by using point...

This paper evaluated the regional tourism competitiveness of 22 county-level administrative regions in Ningxia Hui Autonomous Region, China. The study analyzed connotation from perspectives resources and economic environmental benefits, established an evaluation index system for comprehensive competitiveness. used entropy weight TOPSIS to measure level Ningxia, spatial association hot cold analysis describe pattern Ningxia. results indicated that Lingwu City, Xixia District, Huinong District...

Droop control is a widely used method in DC microgrid to solve the problem of current sharing errors. However, it difficult trade off errors and bus voltage deviation parallel converters microgrids. This paper designs an improved droop scheme based on adaptive sliding mode (SMC). The coefficient adjusted adaptively by proportional integral (PI) loop minimize compensated another PI loop, through acquisition current. Moreover, SMC output each converter instantaneously. Finally, simulation...

With the in-depth development of Western Development Strategy and Rural Revitalization, tourism industry has become an important economic sector to drive local in northwestern minority areas China. This study established a database resources Longde county analyzed spatial pattern these by using scale index kernel density. From perspective natural social environment, this paper quantitatively discusses influencing factors based on multiple linear regression model. The results showed that: (1)...

Tourism has emerged as a pivotal element of China’s economic development, particularly within its coastal cities. This paper presents comprehensive analysis city tourism focusing on 53 Through meticulous combination literature and data crawling, robust database is constructed, encompassing resources revenues. study delineates the spatial–temporal evolution pattern development employs geo-detector methods to quantitatively analyze impact factors driving this evolution. Key findings reveal...