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《医学前沿(英文)》 doi: 10.1007/s11684-023-1006-x
关键词: neurodevelopmental disorder autosomal recessive intellectual disability consanguinity spastic paraplegia hearing loss TMEM141
Zhi-Peng CHEN; Songye ZHU
《结构与土木工程前沿(英文)》 2022年 第16卷 第8期 页码 962-975 doi: 10.1007/s11709-022-0873-6
关键词: shape memory alloy eccentrically braced frame self-centring fragility loss function resilience
邓赵红,王士同,吴锡生,胡德文
《中国工程科学》 2004年 第6卷 第9期 页码 38-45
针对极大熵聚类算法MEC(maximum entropy clustering)对例外点(outliers)较敏感和不能标识例外点的缺陷,提出了一种改进的极大熵聚类算法RMEC(robust maximum entropy clustering)。该算法的基本思想是通过引入Vapnik's ε-不敏感损失函数和权重因子重新构建目标函数,并利用优化理论推导出新的学习公式。RMEC算法不但对例外点较之MEC算法有更好的鲁棒性,而且还能有效地利用学习后的权重因子标识出数据集中存在的例外点。仿真试验结果亦表明了RMEC算法的上述优点。
Power fluctuation and power loss of wind turbines due to wind shear and tower shadow
Binrong WEN, Sha WEI, Kexiang WEI, Wenxian YANG, Zhike PENG, Fulei CHU
《机械工程前沿(英文)》 2017年 第12卷 第3期 页码 321-332 doi: 10.1007/s11465-017-0434-1
The magnitude and stability of power output are two key indices of wind turbines. This study investigates the effects of wind shear and tower shadow on power output in terms of power fluctuation and power loss to estimate the capacity and quality of the power generated by a wind turbine. First, wind speed models, particularly the wind shear model and the tower shadow model, are described in detail. The widely accepted tower shadow model is modified in view of the cone-shaped towers of modern large-scale wind turbines. Power fluctuation and power loss due to wind shear and tower shadow are analyzed by performing theoretical calculations and case analysis within the framework of a modified version of blade element momentum theory. Results indicate that power fluctuation is mainly caused by tower shadow, whereas power loss is primarily induced by wind shear. Under steady wind conditions, power loss can be divided into wind farm loss and rotor loss. Wind farm loss is constant at 3α(3α−1)R2/(8H2). By contrast, rotor loss is strongly influenced by the wind turbine control strategies and wind speed. That is, when the wind speed is measured in a region where a variable-speed controller works, the rotor loss stabilizes around zero, but when the wind speed is measured in a region where the blade pitch controller works, the rotor loss increases as the wind speed intensifies. The results of this study can serve as a reference for accurate power estimation and strategy development to mitigate the fluctuations in aerodynamic loads and power output due to wind shear and tower shadow.
关键词: wind turbine wind shear tower shadow power fluctuation power loss
Turnover and loss of nitrogenous compounds during composting of food wastes
YANG Yanmei, ZHANG Xiangfeng, YANG Zhifeng, XI Beidou, LIU Hongliang
《环境科学与工程前沿(英文)》 2008年 第2卷 第2期 页码 251-256 doi: 10.1007/s11783-008-0042-8
Winner determination problem with loss-averse buyers in reverse auctions
Xiaohu QIAN, Min HUANG, Yangyang YU, Xingwei WANG
《工程管理前沿(英文)》 2017年 第4卷 第2期 页码 212-220 doi: 10.15302/J-FEM-2017019
关键词: reverse auction loss aversion winner determination improved ant colony algorithm
A novel energy loss model and optimization design of the coin chute flection curve
Qinghua LIANG, Jinqiu MO, Weizhong GUO
《机械工程前沿(英文)》 2012年 第7卷 第1期 页码 38-46 doi: 10.1007/s11465-012-0311-x
In this paper, we propose a novel design model based on the energy loss of the coin (ELM model) to optimize the flection curve, which is widely used in coin operated machines. Two different kinds of energy loss models are analyzed according to dynamic characteristics of the coin falling movement. The flection curve is constructed based on cubic quasi-uniform B-spline with the data points and end points derivatives as inputs, and the curve model is governed and affected by energy loss equations, allowing to minimize the total energy loss before the coin arrives at the detecting position, thus to reduce the energy loss and collisions between the coin and the flection, thus to improve the testing accuracy. A case study with a typical Chinese currency coin shows the effectiveness of the model using GA optimization toolbox.
关键词: flection curve B-spline energy loss model (ELM model) optimization design
K Sathish KUMAR,S NAVEEN
《能源前沿(英文)》 2014年 第8卷 第4期 页码 434-442 doi: 10.1007/s11708-014-0313-y
关键词: distribution system reconfiguration (DFR) power loss reduction catfish particle swarm optimization (catfish PSO) radial structure
Yifu ZHANG,Hongwen LI,Jin HE,Qingjie WANG,Ying CHEN,Wanzhi CHEN,Shaochun MA
《农业科学与工程前沿(英文)》 2016年 第3卷 第2期 页码 161-170 doi: 10.15302/J-FASE-2016104
关键词: infiltration initial soil water content rainfall simulation soil loss straw mulching
Erhui GUO,Liding CHEN,Ranhao SUN,Zhaoming WANG
《环境科学与工程前沿(英文)》 2015年 第9卷 第2期 页码 279-287 doi: 10.1007/s11783-014-0667-8
关键词: riparian vegetation patterns soil nutrient distribution nutrient loss management
一种用于淮河上游日径流预测的增强型LSTM模型 Article
满媛媛, 杨勤丽, 邵俊明, 王国庆, 白林龙, 薛运宏
《工程(英文)》 2023年 第24卷 第5期 页码 230-239 doi: 10.1016/j.eng.2021.12.022
径流预测对防洪具有重要意义。然而,由于径流过程的复杂性和随机性,很难准确预测日径流量,尤其是洪峰径流量。为此,本研究提出了一种用于日径流预测的增强型长短期记忆(LSTM)模型,其中集成了特征提取器并引入了新的损失函数。具体而言,为每个气象站建立由三个LSTM网络组成的特征提取器,旨在提取每个气象站输入数据的时间特征。此外,两个损失函数[ peak error tanh(PET)、peak error swish(PES)]用来增强峰值径流预测的权重,同时减少正常径流预测的权重。本研究以中国淮河流域上游为研究对象,利用增强型LSTM模型进行1960—2016 年的日径流预测。结果表明,增强型LSTM模型表现良好,纳什效率系数(NSE)在验证期(2005 年11 月至2016 年12 月)达到了0.917~0.924,优于广泛使用的集总式水文模型(AWBM、Sacramento、SimHyd、Tank Model)和数据驱动模型[人工神经网络(ANN)、支持向量回归(SVR)、门控循环单元(GRU)]。以PES 作为损失函数的增强型LSTM在极端径流预测方面表现最佳,在洪水期间的平均NSE为0.873。此外,海拔较高的气象站的降水比距离出水口最近的气象站对径流预测的影响更大。该研究可为流域日径流预测提供有效工具,为流域防洪和水安全管理提供技术支持。
《医学前沿(英文)》 2021年 第15卷 第3期 页码 460-471 doi: 10.1007/s11684-021-0861-6
关键词: low-carbohydrate diet obesity nonalcoholic fatty liver disease continuous glucose monitoring mean sensor glucose
A novel approach to minimizing material loss for computer numerical control flank-regrinding of worn
《机械工程前沿(英文)》 2023年 第18卷 第3期 doi: 10.1007/s11465-023-0757-z
关键词: flank-regrinding worn end mill wheel position and orientation material loss over-cut
Haiyan REN, Jie QIN, Baolong YAN, Alata, Baoyinhexige, Guodong HAN
《农业科学与工程前沿(英文)》 2018年 第5卷 第1期 页码 64-70 doi: 10.15302/J-FASE-2017194
关键词: climate warming grassland litter decomposition nitrogen deposition nutrient release
Yang An, Chao Chen, Jundong Zhu, Pankaj Dwivedi, Yanjun Zhao, Zheng Wang
《化学科学与工程前沿(英文)》 2020年 第14卷 第5期 页码 880-888 doi: 10.1007/s11705-019-1864-6
关键词: hypoxia microtubule inhibitor drug delivery azo-combretastatin A4 photo-responsive
标题 作者 时间 类型 操作
Panoramic variation analysis of a family with neurodevelopmental disorders caused by biallelic loss-of-function
期刊论文
Seismic responses and resilience of novel SMA-based self-centring eccentrically braced frames under near-fault ground motions
Zhi-Peng CHEN; Songye ZHU
期刊论文
Power fluctuation and power loss of wind turbines due to wind shear and tower shadow
Binrong WEN, Sha WEI, Kexiang WEI, Wenxian YANG, Zhike PENG, Fulei CHU
期刊论文
Turnover and loss of nitrogenous compounds during composting of food wastes
YANG Yanmei, ZHANG Xiangfeng, YANG Zhifeng, XI Beidou, LIU Hongliang
期刊论文
Winner determination problem with loss-averse buyers in reverse auctions
Xiaohu QIAN, Min HUANG, Yangyang YU, Xingwei WANG
期刊论文
A novel energy loss model and optimization design of the coin chute flection curve
Qinghua LIANG, Jinqiu MO, Weizhong GUO
期刊论文
Power system reconfiguration and loss minimization for a distribution systems using “Catfish PSO” algorithm
K Sathish KUMAR,S NAVEEN
期刊论文
Effect of mulching with maize straw on water infiltration and soil loss at different initial soil moistures
Yifu ZHANG,Hongwen LI,Jin HE,Qingjie WANG,Ying CHEN,Wanzhi CHEN,Shaochun MA
期刊论文
Effects of riparian vegetation patterns on the distribution and potential loss of soil nutrients: a case
Erhui GUO,Liding CHEN,Ranhao SUN,Zhaoming WANG
期刊论文
Low-carbohydrate diets lead to greater weight loss and better glucose homeostasis than exercise: a randomized
期刊论文
A novel approach to minimizing material loss for computer numerical control flank-regrinding of worn
期刊论文
Mass loss and nutrient dynamics during litter decomposition in response to warming and nitrogen addition
Haiyan REN, Jie QIN, Baolong YAN, Alata, Baoyinhexige, Guodong HAN
期刊论文