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23,271 Results Found

  • Article
  • Open Access
35 Citations
6,073 Views
27 Pages

Detailed Fluctuation Theorems: A Unifying Perspective

  • Riccardo Rao and
  • Massimiliano Esposito

24 August 2018

We present a general method to identify an arbitrary number of fluctuating quantities which satisfy a detailed fluctuation theorem for all times within the framework of time-inhomogeneous Markovian jump processes. In doing so, we provide a unified pe...

  • Article
  • Open Access
2 Citations
1,841 Views
24 Pages

24 August 2025

We systematically investigate the combined impact of process variation effects (PVEs), metal gate work function fluctuation (WKF), and random dopant fluctuation (RDF) on the key electrical characteristics of sub-1-nm technology node gate-all-around s...

  • Article
  • Open Access
21 Citations
9,189 Views
18 Pages

1 April 2014

Some critical trends in information theory, its role in living systems and utilization in fluctuation theory are discussed. The mutual information of thermodynamic coupling is incorporated into the generalized fluctuation theorem by using information...

  • Feature Paper
  • Article
  • Open Access
605 Views
13 Pages

14 August 2025

The fluctuation theorem for information exchange, originally established by Sagawa and Ueda, provides a fundamental framework for understanding the role of correlations in coupled classical stochastic systems. Building upon this foundation, Jinwoo de...

  • Article
  • Open Access
204 Citations
11,218 Views
21 Pages

20 March 2018

Dispersion entropy (DispEn) is a recently introduced entropy metric to quantify the uncertainty of time series. It is fast and, so far, it has demonstrated very good performance in the characterisation of time series. It includes a mapping step, but...

  • Article
  • Open Access
7 Citations
3,721 Views
16 Pages

The Fluctuation Characteristics and Periodic Patterns of Potato Prices in China

  • Hongwei Lu,
  • Tingting Li,
  • Jianfei Lv,
  • Aoxue Wang,
  • Qiyou Luo,
  • Mingjie Gao and
  • Guojing Li

9 May 2023

The aim of this paper was to provide a more scientific and effective analysis of the fluctuation pattern of the Chinese potato market by extracting the characteristics of the price fluctuation cycle to effectively grasp the characteristics of price c...

  • Article
  • Open Access
5 Citations
4,068 Views
16 Pages

Calculation of 1/f Fluctuation from Sound Signal and Comfort Evaluation

  • Taro Kato,
  • Takuya Kitamura,
  • Fumiya Maehara,
  • Daigo Uchino,
  • Kazuki Ogawa,
  • Keigo Ikeda,
  • Ayato Endo,
  • Hideaki Kato,
  • Takayoshi Narita and
  • Mitsuaki Furui

20 September 2022

Providing a comfortable sound for users is an important factor for high-value products. Therefore, many studies have investigated pleasant sound levels for developing and manufacturing new products. Notably, sounds containing 1/f fluctuations provide...

  • Feature Paper
  • Article
  • Open Access
3 Citations
2,515 Views
23 Pages

Fluctuation Theorems for Heat Exchanges between Passive and Active Baths

  • Massimiliano Semeraro,
  • Antonio Suma and
  • Giuseppe Negro

23 May 2024

In addition to providing general constraints on probability distributions, fluctuation theorems allow us to infer essential information on the role played by temperature in heat exchange phenomena. In this numerical study, we measure the temperature...

  • Article
  • Open Access
1,181 Views
11 Pages

8 September 2025

The Fluctuation Theorem establishes a relationship between microscopic reversibility and macroscopic irreversible phenomena, such as dissipation. In this short paper, we present an elementary derivation of this theorem within the framework of stochas...

  • Article
  • Open Access
3 Citations
4,388 Views
20 Pages

Impact of Oil Financialization on Oil Price Fluctuation: A Perspective of Heterogeneity

  • Yanhong Feng,
  • Xiaolei Wang,
  • Shuanglian Chen and
  • Yanqiong Liu

11 June 2022

A large number of studies have confirmed that oil speculation has played a vital role in oil price fluctuation in recent years. However, the heterogeneous impact of oil financialization on oil price fluctuation has not received enough attention. Base...

  • Article
  • Open Access
2 Citations
3,435 Views
16 Pages

13 January 2023

We establish a fluctuation theorem for an open quantum bipartite system that explicitly manifests the role played by quantum correlation. Generally quantum correlations may substantially modify the universality of classical thermodynamic relations in...

  • Review
  • Open Access
6 Citations
7,824 Views
22 Pages

13 September 2016

The worm-like chain is one of the best theoretical models of the semiflexible polymer. The structure factor, which can be obtained by scattering experiment, characterizes the density correlation in different length scales. In the present review, the...

  • Article
  • Open Access
8 Citations
3,050 Views
10 Pages

Joint Fluctuation Theorems for Sequential Heat Exchange

  • Jader Santos,
  • André Timpanaro and
  • Gabriel Landi

12 July 2020

We study the statistics of heat exchange of a quantum system that collides sequentially with an arbitrary number of ancillas. This can describe, for instance, an accelerated particle going through a bubble chamber. Unlike other approaches in the lite...

  • Article
  • Open Access
1 Citations
931 Views
35 Pages

11 June 2025

Under the background of intensified global economic fluctuations, to prevent the systemic risk of real estate (e.g., the U.S. subprime crisis), this study constructs a linkage network of the real estate industry in the U.S. based on the complex netwo...

  • Article
  • Open Access
2 Citations
5,323 Views
14 Pages

10 January 2024

We give a vacuum description with zero-point density for virtual fluctuations. One of the goals is to explain the origin of the vacuum permittivity and permeability and to calculate their values. In particular, we improve on existing calculations by...

  • Article
  • Open Access
31 Citations
7,489 Views
17 Pages

18 February 2016

Hydro-wind system output fluctuations are the primary factors used to assess the effects of hydropower on power companies compensating for wind power intermittency. Considering that most fluctuation indices can only characterize one aspect of fluctua...

  • Article
  • Open Access
5 Citations
2,651 Views
16 Pages

15 April 2022

Periodical fluctuation is a common phenomenon in food safety supervision. The existing literature on China’s food safety supervision mainly analyzes periodical fluctuation by statistical methods. This paper provides a theoretical explanation by...

  • Article
  • Open Access
13 Citations
3,089 Views
21 Pages

Analysis and Suppression of Voltage Violation and Fluctuation with Distributed Photovoltaic Integration

  • Yahui Li,
  • Yuanyuan Sun,
  • Kejun Li,
  • Jingru Zhuang,
  • Yongliang Liang and
  • Yanqing Pang

8 October 2021

In recent years, the violation and fluctuation of system voltage has occurred with greater frequency with the integration of high-penetration distributed photovoltaic generation. In this paper, the voltage violation and fluctuation in a high-penetrat...

  • Article
  • Open Access
67 Citations
5,946 Views
14 Pages

Numerical Study of Pressure Fluctuation and Unsteady Flow in a Centrifugal Pump

  • Ling Bai,
  • Ling Zhou,
  • Chen Han,
  • Yong Zhu and
  • Weidong Shi

9 June 2019

A pump is one of the most important machines in the processes and flow systems. The operation of multistage centrifugal pumps could generate pressure fluctuations and instabilities that may be detrimental to the performance and integrity of the pump....

  • Article
  • Open Access
8 Citations
2,269 Views
13 Pages

Experimental Research on the Fluctuation Characteristics of Water Film Driven by Wind

  • Huanyu Zhao,
  • Hao Dai,
  • Dongyu Zhu,
  • Ning Zhao,
  • Chengxiang Zhu,
  • Senyun Liu and
  • Chunling Zhu

22 July 2022

A series of experimental studies were conducted to explore the fluctuation characteristics of the water film under the air flow condition with the research background of the anti-icing system. The dynamic measurement of the water film on the surface...

  • Article
  • Open Access
11 Citations
5,039 Views
12 Pages

30 December 2019

Experimental measurements to analyze the pressure fluctuation performance of a centrifugal pump with a vaned-diffuser, which its specific speed is 190. Results indicate that the main cause of pressure fluctuation is the rotor-stator interference at t...

  • Article
  • Open Access
4 Citations
3,914 Views
9 Pages

22 March 2019

Sagawa and Ueda established a fluctuation theorem of information exchange by revealing the role of correlations in stochastic thermodynamics and unified the non-equilibrium thermodynamics of measurement and feedback control. They considered a process...

  • Article
  • Open Access
6 Citations
4,076 Views
17 Pages

Impact of Tail Water Fluctuation on Turbine Start-Up and Optimized Regulation

  • Sheng Chen,
  • Gaohui Li,
  • Delou Wang,
  • Xingtao Wang,
  • Jian Zhang and
  • Xiaodong Yu

26 July 2019

Small hydropower plants are usually run-of-river with a poor adjustment capacity, and, therefore, large tail water fluctuation may be induced during flood discharge. Meanwhile, the turbine units need to be quickly started-up due to the regulation req...

  • Article
  • Open Access
1,760 Views
13 Pages

Improving the Resolution of Correlation Imaging via the Fluctuation Characteristics

  • Huan Zhao,
  • Xiaoqian Wang,
  • Chao Gao,
  • Zhuo Yu,
  • Hong Wang,
  • Yu Wang,
  • Lidan Gou and
  • Zhihai Yao

23 January 2024

The resolution is an important factor in evaluating image quality. In general, the resolution of correlation imaging is taken to the full width at half maximum (FWHM) of the point spread function (PSF) produced by the second-order correlation functio...

  • Article
  • Open Access
20 Citations
3,994 Views
13 Pages

28 June 2019

Cavitation and system instability are the most common problems occurring in hydraulic power systems, especially operated under part-load conditions. Previous research show that when the hydraulic turbine operates apart from designed conditions, such...

  • Article
  • Open Access
5 Citations
5,357 Views
15 Pages

20 August 2015

We present a brief overview of some key concepts in the theory of generalized complex manifolds. This new geometry interpolates, so to speak, between symplectic geometry and complex geometry. As such it provides an ideal framework to analyze thermody...

  • Article
  • Open Access
14 Citations
3,254 Views
16 Pages

7 May 2022

In order to study pressure fluctuation characteristics of a centrifugal pump as turbine (PAT) in its start-up process, Fluent was used to do numerical simulation of the PAT start-up process. Time and frequency domain analyses were performed on the da...

  • Article
  • Open Access
17 Citations
5,055 Views
23 Pages

1 October 2017

Many of the existing autoregressive moving average (ARMA) forecast models are based on one main factor. In this paper, we proposed a new two-factor first-order ARMA forecast model based on fuzzy fluctuation logical relationships of both a main factor...

  • Article
  • Open Access
2,151 Views
17 Pages

Increased intraocular pressure (IOP) is the most important risk factor for glaucoma. The role of IOP fluctuation, independently from elevated IOP, has not yet been confirmed in glaucoma. We investigated the effects of IOP fluctuation itself on retina...

  • Article
  • Open Access
3 Citations
2,258 Views
21 Pages

15 October 2021

In order to accurately evaluate the flow stability of the flow standard facility, the flow fluctuation in the standard facility needs to be accurately measured. However, the flow fluctuation signal is always superimposed with the fluctuation signal o...

  • Article
  • Open Access
19 Citations
13,127 Views
13 Pages

Binary Fingerprints at Fluctuation-Enhanced Sensing

  • Hung-Chih Chang,
  • Laszlo B. Kish,
  • Maria D. King and
  • Chiman Kwan

5 January 2010

We have developed a simple way to generate binary patterns based on spectral slopes in different frequency ranges at fluctuation-enhanced sensing. Such patterns can be considered as binary "fingerprints" of odors. The method has experimentally been d...

  • Article
  • Open Access
3 Citations
2,325 Views
13 Pages

An Experimental Study on the Migration of Pb in the Groundwater Table Fluctuation Zone

  • Jihong Qu,
  • Tiangang Yan,
  • Yifeng Zhang,
  • Yuepeng Li,
  • Ran Tian,
  • Wei Guo and
  • Jueyan Jiang

12 April 2022

As a result of fluctuations in the shallow groundwater table, hydrodynamic conditions change alongside environmental conditions and hydrogeochemical processes to affect pollutant migration. The study aimed to investigate the migration, adsorption, an...

  • Article
  • Open Access
2 Citations
2,606 Views
12 Pages

Cyclic Electron Flow Alleviates the Stress of Light Fluctuation on Soybean Photosynthesis

  • Yi Lei,
  • Jing Gao,
  • Qi Wang,
  • Weiying Zeng,
  • Dhungana Diwakar,
  • Yaodan Zhang,
  • Xianming Tan,
  • Zudong Sun,
  • Feng Yang and
  • Wenyu Yang

Crops often face light intensity fluctuations in natural settings. Intercropping is widely used to improve crop yield and resource utilization worldwide, but crops suffer from high-frequency and high-intensity light fluctuations due to mutual crop in...

  • Article
  • Open Access
2 Citations
2,090 Views
13 Pages

18 July 2023

This paper studies a newsvendor’s optimal ordering decisions in portfolio procurement from long-term contracts and spot purchases. In portfolio procurement, the newsvendor can order commodities in a long-term contract to meet market demand, and...

  • Article
  • Open Access
8 Citations
3,467 Views
21 Pages

3 February 2023

High-pressure fluctuation and flow ripple may cause unexpected vibration and noise when the piston pump works under severe conditions, and eventually lead to hydraulic transmission failure. The geometry of the valve plate has a great influence on the...

  • Article
  • Open Access
5 Citations
2,640 Views
17 Pages

A Study of the Interface Fluctuation and Energy Saving of Oil–Water Annular Flow

  • Fan Jiang,
  • Jiaqing Chang,
  • Haitao Huang and
  • Junhong Huang

14 March 2022

Oil–water annular flow is an efficient method of heavy oil transportation for energy-saving. To deeply study the influencing factors of the energy savings of oil–water annular flow, this paper compares the interface fluctuation and energy...

  • Article
  • Open Access
2,062 Views
16 Pages

11 February 2024

The fluctuation relation stands as a fundamental result in nonequilibrium statistical physics. Its derivation, particularly in the stationary state, places stringent conditions on the physical systems of interest. On the other hand, numerical analyse...

  • Article
  • Open Access
13 Citations
4,032 Views
17 Pages

Adaptive Model Predictive Control for Mobile Robots with Localization Fluctuation Estimation

  • Jie Meng,
  • Hanbiao Xiao,
  • Liyu Jiang,
  • Zhaozheng Hu,
  • Liquan Jiang and
  • Ning Jiang

23 February 2023

Mobile robots are widely employed in various fields to perform autonomous tasks. In dynamic scenarios, localization fluctuations are unavoidable and obvious. However, common controllers do not consider the impact of localization fluctuations, resulti...

  • Article
  • Open Access
1,132 Views
19 Pages

26 May 2025

The daily operation of cascade hydropower stations induces periodic water level fluctuations (WLFs) that propagate as gravity waves, significantly affecting the hydrodynamics of reservoirs. Previous studies have mainly focused on the effects of indiv...

  • Article
  • Open Access
28 Citations
5,671 Views
20 Pages

Dynamic Charging of Electric Vehicle with Negligible Power Transfer Fluctuation

  • Md Morshed Alam,
  • Saad Mekhilef,
  • Mehdi Seyedmahmoudian and
  • Ben Horan

16 May 2017

High-efficiency inductive power transfer (IPT) with low misalignment effects is a key issue in the dynamic charging of electric vehicle (EV) systems. In this study, an advanced concept of analysis and design of transmitter and receiver coils with a s...

  • Article
  • Open Access
3 Citations
1,985 Views
21 Pages

11 July 2024

Hydraulic power take-off (PTO) is increasingly favored as energy regulation and transmission system in wave energy converters (WEC), significantly smoothing the inherent randomness and fluctuation of wave energy. This paper designed a novel hydraulic...

  • Article
  • Open Access
5 Citations
1,966 Views
11 Pages

Measurement Error in Thermoelectric Generator Induced by Temperature Fluctuation

  • Yanan Li,
  • Hao Yang,
  • Chuanbin Yu,
  • Wenjie Zhou,
  • Qiang Zhang,
  • Haoyang Hu,
  • Peng Sun,
  • Jiehua Wu,
  • Xiaojian Tan and
  • Jun Jiang
  • + 2 authors

22 February 2024

The thermal-electric conversion efficiency is a crucial metric for evaluating the performance of a thermoelectric generator (TEG). However, accurate measurement of this efficiency remains a significant challenge due to various factors that impact hea...

  • Article
  • Open Access
3 Citations
1,677 Views
13 Pages

Research on Spatial Scale of Fluctuation for the Uncertain Thermal Parameters of Artificially Frozen Soil

  • Tao Wang,
  • Jiazeng Cao,
  • Xiangjun Pei,
  • Zequn Hong,
  • Yaohui Liu and
  • Guoqing Zhou

9 December 2022

The scales of fluctuation of uncertain thermal parameters are the key to evaluating the spatial variability of artificially frozen soil, and it can directly affect the thermal engineering analysis of artificial frozen walls. In this study, the therma...

  • Article
  • Open Access
10 Citations
5,664 Views
11 Pages

Investigation of the Temperature Fluctuation of Single-Phase Fluid Based Microchannel Heat Sink

  • Tao Wang,
  • Jiejun Wang,
  • Jian He,
  • Chuangui Wu,
  • Wenbo Luo,
  • Yao Shuai,
  • Wanli Zhang and
  • Chengkuo Lee

10 May 2018

The temperature fluctuation in a single-phase microchannel heat sink (MCHS) is investigated using the integrated temperature sensors with deionized water as the coolant. Results show that the temperature fluctuation in single phase is not negligible....

  • Feature Paper
  • Article
  • Open Access
7 Citations
4,062 Views
14 Pages

Testing the Steady-State Fluctuation Relation in the Solar Photospheric Convection

  • Giorgio Viavattene,
  • Giuseppe Consolini,
  • Luca Giovannelli,
  • Francesco Berrilli,
  • Dario Del Moro,
  • Fabio Giannattasio,
  • Valentina Penza and
  • Daniele Calchetti

28 June 2020

The turbulent thermal convection on the Sun is an example of an irreversible non-equilibrium phenomenon in a quasi-steady state characterized by a continuous entropy production rate. Here, the statistical features of a proxy of the local entropy prod...

  • Article
  • Open Access
15 Citations
3,889 Views
16 Pages

Investigation of Pressure Fluctuation and Pulsating Hydraulic Axial Thrust in Francis Turbines

  • Xing Zhou,
  • Changzheng Shi,
  • Kazuyoshi Miyagawa,
  • Hegao Wu,
  • Jinhong Yu and
  • Zhu Ma

5 April 2020

Under the circumstances of rapid expansion of diverse forms of volatile and intermittent renewable energy sources, hydropower stations have become increasingly indispensable for improving the quality of energy conversion processes. As a consequence,...

  • Article
  • Open Access
2 Citations
2,334 Views
11 Pages

28 January 2023

Single-pixel cameras offer improved performance in non-visible imaging compared with modern digital cameras which capture images with an array of detector pixels. However, the quality of the images reconstructed by single-pixel imaging technology fai...

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