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An Improved Cuckoo Search Algorithm for Multi-Objective Optimization

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Wuhan University Journal of Natural Sciences 2017年第4期22卷 289-294页

作者： TIAN Mingzheng HOU Kuolin WANG zhaowei WAN Zhongping School of Mathematics and Statistics Wuhan University Faculty of Foundational Education Liming Vocational University

The recently proposed Cuckoo search algorithm is an evolutionary algorithm based on probability. It surpasses other algorithms in solving the multi-modal discontinuous and nonlinear problems. Searches made by it are very efficient because it adopts Levy flight to carry out random walks. This paper proposes an improved version of cuckoo search for multi-objective problems（IMOCS）. Combined with nondominated sorting, crowding distance and Levy flights, elitism strategy is applied to improve the algorithm. Then numerical studies are conducted to compare the algorithm with DEMO and NSGA-II against some benchmark test functions. Result shows that our improved cuckoo search algorithm convergences rapidly and performs efficienly.

关键词： multi-objective optimization evolutionary algorithm Cuckoo search Levy flight

Ore Genesis of the Kalatongke Cu-Ni Sulfide Deposits, Western China: Constraints from Volatile Chemical and Carbon Isotopic Compositions

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Acta Geologica Sinica(English Edition) 2012年第3期86卷 568-578页

作者： FU Piaoer TANG Qingyan ZHANG Mmgjie ZHANG zhaowei LI Liwu LI Wenyuan Key Laboratory of Western China's Environmental Systems(MOE) School of Earth SciencesLanzhou UniversityLanzhou 730000China Xi'an Institute of Geology and Mineral Resources CGSXi'an 710054China Key Laboratory of Petroleum Resource Research Institute of Geology and GeophysicsCASLanzhou 730000China

The Kalatongke Cu-Ni sulfide deposits located in the East Junggar terrane, northern Xinjiang, western China are the largest magmatic sulfide deposits in the Central Asian Orogenic Belt （CAOB）. The chemical and carbon isotopic compositions of the volatiles trapped in olivine, pyroxene and sulfide mineral separates were analyzed by vacuum stepwise-heating mass spectrometry. The results show that the released volatiles are concentrated at three temperature intervals of 200-400°C, 400-900°C and 900-1200°C. The released volatiles from silicate mineral separates at 400-900°C and 900-1200°C have similar chemical and carbon isotopic compositions, which are mainly composed of H2O （av. ~92 mol%） with minor H2, CO2, H2S and SO2, and they are likely associated with the ore-forming magmatic volatiles. Light δ13CCO2 values （from -20.86‰ to -12.85‰） of pyroxene indicate crustal contamination occurred prior to or synchronous with pyroxene crystallization of mantlederived ore-forming magma. The elevated contents of H2 and H2O in the olivine and pyroxene suggest a deep mantle-originated ore-forming volatile mixed with aqueous volatiles from recycled subducted slab. High contents of CO2 in the ore-forming magma volatiles led to an increase in oxygen fugacity, and thereby reduced the solubility of sulfur in the magma, then triggered sulfur saturation followed by sulfide melt segregation; CO2 contents correlated with Cu contents in the whole rocks suggest that a supercritical state of CO2 in the ore-forming magma system under high temperature and pressure conditions might play a key role in the assemblage of huge Cu and Ni elements. The volatiles released from constituent minerals of intrusion 1# have more CO2 and SO2 oxidized gases, higher CO2/CH4 and SO2/H2S ratios and lighter δ13CCO2 than those of intrusions 2# and 3#. This combination suggests that the higher oxidation state of the volatiles in intrusion 1# than intrusions 2# and 3#, which could be one of key ore-forming factors for

关键词： Ore genesis chemical composition carbon isotope volatile mafic–ultramafic intrusion Kalatongke Cu–Ni sulfide deposits Xinjiang

煤系软岩中抽水蓄能电站地下厂房大断面硐室支护设计

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煤炭科技 2024年第3期45卷 68-74页

作者：张沛顶李福清管增伦许国安苗梅张照伟邬敏张凯张朋刘永上海大屯能源股份有限公司江苏沛县221611 中国矿业大学深地工程智能建造与健康运维全国重点实验室江苏徐州221116 深地科学与工程云龙湖实验室江苏徐州221116 中国中煤能源集团有限公司北京100120 中国矿业大学力学与土木工程学院江苏徐州221116 中电联电力发展研究院有限公司北京100053 中煤天津设计工程有限责任公司天津300120

为实现绿色低碳可持续发展,大屯能源股份有限公司龙东煤矿拟在埋深约300 m的煤系软岩地层中建设抽水蓄能电站,决定该项目可行性的关键问题之一是能否对主厂房大断面硐室进行经济有效的支护。为此,提出了基于规范和灰色关联度分析的支护... 详细信息

为实现绿色低碳可持续发展,大屯能源股份有限公司龙东煤矿拟在埋深约300 m的煤系软岩地层中建设抽水蓄能电站,决定该项目可行性的关键问题之一是能否对主厂房大断面硐室进行经济有效的支护。为此,提出了基于规范和灰色关联度分析的支护设计方法。首先对该硐室的围岩稳定性进行分级,然后根据相关规范和工程经验提出4种支护备选方案,继而通过数值模拟对其支护效果进行对比分析,最后运用灰色理论的关联度模型综合支护效果和支护成本确定出技术经济效果最优的支护方案,从大断面软岩硐室的支护角度证明了在龙东煤矿建设抽水蓄能电站的可行性。该支护设计方法科学、可行、高效,可为煤系软岩中大断面硐室的支护设计提供参考。

关键词：煤系地层抽水蓄能电站大断面硐室围岩分级支护设计

Platinum-coordinated graphitic carbon nitride nanosheet used for targeted inhibition of amyloid β-peptide aggregation

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Nano Research 2016年第8期9卷 2411-2423页

作者： Meng Li Yijia Guan zhaowei Chen Nan Gao Jinsong Ren Kai Dong Xiaogang Qu Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Science Changchun 130022 China University of Chinese Academy of Sciences Beijing 100039 China

Amyloid β-peptide （Aβ） aggregation is a critical step in the pathogenesis of Alzheimer＇s disease （AD）. Inhibition of A[3 production, dissolution of existing aggregates and clearance of Aβ represent valid therapeutic strategies against AD. Herein, a novel platinum（II）-coordinated graphitic carbon nitride （g-C3N4） nanosheet （g-C3N4@Pt） has been designed to covalently bind to Aβ and modulate the peptide＇s aggregation and toxicity. Furthermore, g-CBN4@Pt nanosheets possess high photocatalytic activity and can oxygenate Aβ upon visible light irradiation, remarkably attenuating both the aggregation potency and neurotoxicity of Aβ Due to its ability to cross the blood-brain barrier （BBB） and its good biocompatibility, g-C3N4@Pt nanosheet is a promising inhibitor of Aβ aggregation. This study may serve as a model for the engineering of novel multifunctional nanomaterials used for the treatment of AD.

关键词： amyloid disease platinum graphitic carbon nitridenanosheet photooxygenation amyloid β-peptide (Aβ)inhibitors

An intelligent near-infrared light activatable nanosystem for accurate regulation of zinc signaling in living cells

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Nano Research 2017年第9期10卷 3068-3076页

作者： Wei Li Zhen Liu zhaowei Chen Lihua Kang Yijia Guan Jinsong Ren Xiaogang Qu Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resources Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China University of Chinese Academy of Sciences Beijing 100039 China Stem Cell and Cancer Center First Affiliated Hospital Jilin University Changchun 13000 I China

Accurate regulation of cellular zinc signaling is imperative to decipher underlying zinc functions and develop new therapeutic agents. However, the ability to modulate zinc in a spatiotemporal manner remains elusive. We herein report an intelligent spiropyran-upconversion (SP-UCNPs) based nanosystem that enables near-infrared (NIR) light-controlled zinc release at precise times and locations. The magnitude of zinc release can be simply manipulated by varying the duration of NIR irradiation. Moreover, the utilization of NIR light not only showed little damage to cells but also significantly improved penetration depth. By evaluating activity of a model protein, phosphatase 2A, we further validated zinc signaling activation. Importantly, our strategy may be broadly applicable to other types of metal ions, like the ubiquitous second messenger calcium. More importantly, our strategy can potentially enable the precise control of specific signaling pathways of metal ions while minimizing cellular damage, facilitating the advanced manipulation of cellular dynamics.

关键词： nanocarrier zinc upconversion spiropyran cellular manipulation

Modulation　Instability　in　Biased　Photorefractive-Photovoltaic　Crystals

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Chinese Physics Letters 2004年第6期21卷 1086-1088页

作者： LUKe-Qing zhaowei YANGYan-Long SUNChuan-Dong GAOHong-Wen LIJin-Ping ZHANGYan-Peng StateKeyLaboratoryofTransientOpticsTechnology Xi'anInstituteofOpticsandPrecisionMechanicsChineseAcademicofSciencesXi'an710068 DepartmentofElectronicScienceandTechnology Xi'anJiaotongUniversityXi'an710049

We show the modulation instability of broad optical beams in biased photorefractive-photovoltaic crystals under steady-state conditions. This modulation instability growth rate depends on the external bias field, the bulk photovoltaic effect, and the ratio of the optical beam intensity to that of the dark irradiance. Under appropriate conditions, this modulation instability growth rate is the modulation instability growth rate studied previously in biased photorefractive-nonphotovoltaic crystals, and the modulation instability growth rate in open- and closed-circuit photorefractive-photovoltaic crystals can be predicted.

关键词： Growth rate

A measurement of epidermal thickness of fingertip skin from OCT images using convolutional neural network

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Journal of Innovative Optical Health Sciences 2021年第1期4卷 56-62页

作者： Yongping Lin Dezi Li Wang Liu zhaowei Zhong Zhifang Li Youwu He Shulian Wu Fujian Provincial Key Laboratory of Optoelectronic Technology and Devices School of Optoelectronic and Communication Engineering Xiamen University of Technology Xiamen 361024P.R.China Key Laboratory of Optoelectronic Science and Technology for Medicine Ministry of Education Fujian Provincial Key Laboratory of Photonics Technology Fujian Provincial Engineering Technology Research Center of Photoelectric Sensing Application College of Photonic and Electronic Engineering Fujian Normal UniversityFuzhouFujian 350007P.R.China

In this study,we proposed a method to measure the epidermal thickness(ET)of skin based on deep convolutional neural network,which was used to determine the boundaries of skin surface and the ridge portion in dermal-epidermis junction(DE J)in cross-section optical coherence tomography(OCT)images of fingertip *** ET was calculated based on the row difference between the surface and the ridge top,which is determined by search the local maxima of boundary of the ridge *** results demonstrated that the region of ridge portion in DEJ was well determined and the ET measurement in this work can reduce the effect of the papillae valley in DEJ by 9.85%.It can be used for quantitative characterization of skin to differentiate the skin diseases.

关键词： Epidermal thickness cross-section OCT images convolutional neural network

Feedback LSTM Network Based on Attention for Image Description Generator

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Computers, Materials & Continua 2019年第5期59卷 575-589页

作者： zhaowei Qu Bingyu Cao Xiaoru Wang Fu Li Peirong Xu Luhan Zhang Beijing Key Laboratory of Network System and Network Culture Beijing University of Posts and TelecommunicationsBeijing100876China Department of Electrical and Computer Engineering Portland States UniversityPortlandOR 97207-0751USA

Images are complex multimedia data which contain rich semantic *** of current image description generator algorithms only generate plain description,with the lack of distinction between primary and secondary object,leading to insufficient high-level semantic and accuracy under public evaluation *** major issue is the lack of effective network on high-level semantic sentences generation,which contains detailed description for motion and state of the principal *** address the issue,this paper proposes the Attention-based Feedback Long Short-Term Memory Network(AFLN).Based on existing codec framework,there are two independent sub tasks in our method:attention-based feedback LSTM network during decoding and the Convolutional Block Attention Module(CBAM)in the coding ***,we propose an attentionbased network to feedback the features corresponding to the generated word from the previous LSTM decoding *** implement feedback guidance through the related field mapping algorithm,which quantifies the correlation between previous word and latter word,so that the main object can be tracked with highlighted detailed ***,we exploit the attention idea and apply a lightweight and general module called CBAM after the last layer of VGG 16 pretraining network,which can enhance the expression of image coding features by combining channel and spatial dimension attention maps with negligible *** experiments on COCO dataset validate the superiority of our network over the state-of-the-art *** scores and actual effects are *** BLEU 4 score increases from 0.291 to 0.301 while the CIDEr score rising from 0.912 to 0.952.

关键词： Image description generator feedback LSTM network attention CBAM

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星载GPS测量数据预处理方法研究

航空学报 2010年第3期31卷 602-607页

作者：苗赢孙兆伟哈尔滨工业大学航天学院黑龙江哈尔滨150001

针对低地球轨道(LEO)卫星星载全球定位系统(GPS)接收机应用的特点,对星载GPS测量数据误差及其对周跳探测的影响进行了分析,提出TurboEdit数据预处理方法中周跳探测算法的改进算法。在原周跳判断算法的基础上,通过引入与测量数据观测高... 详细信息

针对低地球轨道(LEO)卫星星载全球定位系统(GPS)接收机应用的特点,对星载GPS测量数据误差及其对周跳探测的影响进行了分析,提出TurboEdit数据预处理方法中周跳探测算法的改进算法。在原周跳判断算法的基础上,通过引入与测量数据观测高度角相关的加权系数,将周跳探测与测量误差紧密联系起来。根据观测高度角的变化对测量数据误差进行估计,并根据估计情况对加权系数取值,从而实现对周跳探测算法进行调节,达到降低周跳探测失误率的目的。增加参与定轨计算的观测数据量,提高了低轨卫星连续定轨的能力。通过GRACE编队卫星实测数据对改进算法进行了仿真验证。

关键词： GPS 预处理周跳探测测量误差 TurboEdit