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Your search keyword '"Wang, Yanhu"' showing total 231 results
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231 results on '"Wang, Yanhu"'

17. Field Study and Analysis of Passenger Density in the Beijing Subway Transfer Hall.

Author

Yu, Nan, Wang, Yanhu, Zhou, Yihui, Hu, Yukun, Wu, Jinshun, and Zhang, Lining

Subjects
FIELD research, ENERGY transfer, POTENTIAL energy, WEATHER, DIFFERENTIAL equations
Abstract

Passenger density is a major factor influencing indoor climate conditions and the corresponding energy consumption in the transfer halls of metro transportation hubs. In this study, passenger flow in a subway transfer hall in Beijing was measured across three typical seasons. A differential equation model was established to account for the characteristics of passenger density. Based on this, a passenger density prediction model was developed and utilized for analysis. The results show that passenger density is primarily affected by operation time and the surrounding population composition, with a relatively weak correlation to outdoor weather conditions. Additionally, passenger density differs significantly between weekdays and weekends, with the weekday peak being 2.5 times higher than that on weekends. During the four peak hours on weekdays, both in the morning and evening, passenger density exceeds the design capacity, resulting in insufficient fresh air supply. However, for most of the weekday hours and for all hours on weekends, passenger density remains below the design capacity. This indicates a substantial potential for energy savings by adjusting the fresh air supply according to actual passenger density. [ABSTRACT FROM AUTHOR]

Published
2024
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45. Optimization of Distribution Path considering Cost and Customer Satisfaction under New Retail Modes

Author

Wang, Dengqing, Yang, Yuting, and Wang, Yanhu

Subjects
Retail industry -- Case studies -- Economic aspects -- Analysis, Warehouses -- Case studies -- Economic aspects -- Analysis, Customer satisfaction -- Case studies -- Analysis -- Economic aspects, Logistics -- Case studies -- Economic aspects -- Analysis, Algorithms -- Case studies -- Analysis -- Economic aspects, Algorithm, Transportation industry
Abstract

One of the top issues in logistics management and related research is to establish an effective distribution system that is adaptive to new retail and capable of lowering the cost of logistics while enhancing consumer satisfaction. Aimed at reversing the weak points of current logistics distribution patterns, a dual-objective bipolar model with optimal logistics cost and consumer satisfaction by restraining distribution time and load is tested in this paper to figure out the proper nodes and vehicle routes. Data from general and front warehouses of PuPu mall, a Fuzhou-based online retail enterprise, are made into a case study. Moreover, the immune algorithm and genetic algorithm are adopted to achieve the model solution. It is found that the immune algorithm is more efficient than the genetic algorithm in searching solutions, thus having better adaptivity and effectiveness, and also that the type of distribution vehicle plays a significant role in determining the total distribution cost., Author(s): Dengqing Wang (corresponding author) [1,2]; Yuting Yang [2]; Yanhu Wang [3] 1. Introduction In recent years, online retail (also known as new retail) has shown a rapid growth trend. [...]

Published
2021
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46. Insights into Chemical Bonds for Eliminating the Depletion Region and Accelerating the Photo-Induced Charge Efficient Separation toward Ultrasensitive Photoelectrochemical Sensing.

Author

Wang, Shuai, Yu, Haihan, Ge, Shenguang, Wang, Yanhu, Gao, Chaomin, and Yu, Jinghua

Subjects
CHEMICAL bonds, CHEMICAL engineering, PHOTOCATHODES, ELECTRON-hole recombination, OHMIC contacts, PHOTOELECTROCHEMISTRY, POTENTIAL barrier
Abstract

The empty-space-induced depletion region in photoelectrodes severely exacerbates the recombination of electron–hole pairs, thereby reducing the photoelectrochemical (PEC) analytical performance. Herein, the chemical bond that can suppress the potential barrier and overcome the high energy barrier of out-of-plane Ohmic or Schottky contact is introduced into the PEC sensor to eliminate the depletion region and dramatically promote the separation of electron–hole pairs. Specifically, three-dimensional (3D) hierarchically wheatear-like TiO2 (HWT) nanostructures featuring a large surface area to absorb incident light are crafted as the substrate. The facile carbonized strategy is further employed to engineer the Ti-C chemical bond, serving as the touchstone. The average PL lifetime of HWT-C (4.14 ns) is much shorter than that of the 3D HWT (8.57 ns) due to the promoting effect of the chemically bonded structure on carrier separation. Consequently, the 3D HWT-C covalent photoelectrode (600 μA/cm2) exhibits a 3.6-fold increase in photocurrent density compared with the 3D HWT (167 μA/cm2). Ultimately, the model analyte of the tumor marker is detected, and the linear range is 0.02 ng/mL–100 ng/mL with a detection limitation of 0.007 ng/mL. This work provides a basic understanding of chemical bonds in tuning charge separation and insights on strategies for designing high-performance PEC sensors. [ABSTRACT FROM AUTHOR]

Published
2023
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