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Observation of specific ion effects in humus aggregation process

Pedosphere 2021年第5期31卷 736-745页

作者： Rui TIAN Xinmin LIU xiaodan gao Rui LI Hang LI Chongqing Key Laboratory of Soil Multi-scale Interfacial Process College of Resources and EnvironmentSouthwest UniversityChongqing 400715(China)

Specific ion effects play a vital role in a variety of colloidal and interfacial ***,few studies have reported the specific ion effects in the humus aggregation process,which strongly influence the transport and fate of environmental *** this study,soil humus colloids were prepared and characterized,and the specific ion effects on humus aggregation in electrolyte solutions were investigated at a variety of concentrations and pH values using dynamic light scattering *** energy(ΔE),which is known to reflect the dynamics and stability of a colloidal system,was used to quantitatively characterize the specific ion *** results showed that given ΔE value of 2.48×10^(3) J mol^(-1) at pH 3.0,the electrolyte concentrations were 91.6,58.2,3.8,and 0.8 mmol L^(-1) for Na^(+),K^(+),Mg^(2+),and Ca_(2+),respectively,thus indicating significant specific ion effects in the humus aggregation *** importantly,decreasing the electrolyte concentrations increased the differences in the ΔE value between two cation species with the same valence(i.e.,ΔE_(Na)-ΔE_(K) and ΔE_(Mg)-ΔE_(Ca)),while increasing the pH increased the magnitude of ΔE_(Mg)-ΔE_(Ca).However,the classic Derjaguin,Landau,Verwey,and Overbeek(DLVO)theory and the double layer theory,as well as the currently widely used ionic hydration and dispersion effects,failed to predict the experimentally observed increase in the specific ion effects with decreasing electrolyte concentrations in a quantitative *** results have implications for the necessity of involving specific ion effects for a better understanding of humus aggregation and interactions in aqueous and soil systems.

关键词： Derjaguin Landau Verwey and Overbeek theory double layer theory ionic dispersion ionic hydration supramolecular aggregates

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Effect of superplastic deformation on precipitation behavior of sigma phase in 3207 duplex stainless steel

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Progress in Natural Science:Materials International 2021年第2期31卷 334-340页

作者： Jingkun Li Xueping Ren Yanling Zhang Hongliang Hou xiaodan gao School of Materials Science and Engineering University of Science and Technology Beijing AVIC Manufacturing Technology Institute Institute for Advanced Materials and Technology University of Science and Technology Beijing

Owing to excellent strength, toughness and corrosion resistance, duplex stainless steels(DSS) are widely used in constructional and petrochemical applications. Sigma phase, which has detrimental impact on the properties, is readily precipitated during hot working of DSS. However, precipitation behavior of sigma phase during superplastic deformation, which is the most significant processing method of DSS, is still unclear. In the current study,the effect of superplastic deformation on the precipitation behavior of sigma phase was investigated in 3207 duplex stainless steel. The result shows that superplastic deformation could prevent sigma phase precipitation generally by increasing mobility of grain boundaries and decreasing misorientation of the sigma phase boundaries, resulting in some sigma phase precipitated on the twin boundaries. Most of the sigma phase precipitated on ferrite-austenite interface with misorientation of 20–25°, while it precipitated in ferrite or austenite with the misorientation of 40°–45°. The orientation relationship between sigma phase and matrix matched well in austenite and on the ferrite/austenite interfaces, while it showed a small misfit in ferrite. The prevention effect of the superplastic deformation on the sigma phase precipitation was beneficial to quasi stable deformation stage,resulting in longer elongation.

关键词： Duplex stainless steel Superplastic deformation Sigma phase (σ) Precipitation mechanism Hardening effect

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Coordinated expansion co-planning of integrated gas and power systems

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Journal of Modern Power Systems and Clean Energy 2017年第3期5卷 314-325页

作者： Dongxiao WANG Jing QIU Ke MENG xiaodan gao Zhaoyang DONG Centre for Intelligent Electricity Networks The University of NewcastleCallaghanNSW 2308Australia College of Electrical and Information Engineering Changsha University of Science and TechnologyChangsha 410114China School of Electrical and Information Engineering The University of SydneySydneyNSW 2006Australia

As a significant clean energy source, natural gas plays an important role in modern energy context. The growing utilization of natural gas brings uncertainties into the power system, which requires an integrated way to plan natural gas and power systems. In this paper, the co-planning process is formulated as a mixed integer nonlinear programming problem to address emerging challenges,such as system reliability evaluation, market time line mismatch, market uncertainties, demand response effect,etc. An innovative expansion co-planning(ECP) framework is established in this paper to find the best augmentation plan which comes with the minimum ***, to cope with uncertainties in market share,decision analysis is introduced. Meanwhile, the energy conversion efficiency between gas and electricity in the coupled load center is considered in the ECP *** case studies are applied to validate the performance of proposed approach.

关键词： Co-optimization Expansion co-planning Natural gas system System reliability evaluation

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Optimal air-conditioning load control in distribution network with intermittent renewables

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Journal of Modern Power Systems and Clean Energy 2017年第1期5卷 55-65页

作者： Dongxiao WANG Ke MENG xiaodan gao Colin COATES Zhaoyang DONG Centre for Intelligent Electricity Networks The University of NewcastleCallaghanNSW 2308Australia College of Electrical and Information Engineering Changsha University of Science and TechnologyChangsha 410114China School of Electrical and Information Engineering The University of SydneySydneyNSW 2006Australia School of Electrical Engineering and Computer Science The University of NewcastleCallaghanNSW 2308Australia

The coordinated operation of controllable loads,such as air-conditioning load, and distributed generation sources in a smart grid environment has drawn significant attention in recent years. To improve the wind power utilization level in the distribution network and minimize the total system operation costs, this paper proposes a MILP(mixed integer linear programming) based approach to schedule the interruptible air-conditioning loads. In order to mitigate the uncertainties of the stochastic variables including wind power generation, ambient temperature change, and electricity retail price, the rolling horizon optimization(RHO) strategy is employed to continuously update the real-time information and proceed the control window. Moreover, to ensure the thermal comfort of customers, a novel two-parameter thermal model is introduced to calculate the indoor temperature variation more precisely. Simulations on a five node radial distribution network validate the efficiency of the proposed method.

关键词： Demand side management Air-conditioning load Battery energy storage system Rolling horizon optimization

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Distributed Control of Thermostatically Controlled Loads in Distribution Network with High Penetration of Solar PV

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CSEE Journal of Power and Energy Systems 2017年第1期3卷 53-62页

作者： Ke Meng Dongxiao Wang Zhao Yang Dong xiaodan gao Yu Zheng Kit Po Wong School of Electrical and Information Engineering the University of SydneySydneyNSW 2006Australia Centre for Intelligent Electricity Networks The University of NewcastleCallaghanNSW 2308Australia Electric Power Research Institute China Southern Power GridGuangzhou 510080China School of Electrical Electronic and Computer EngineeringThe University of Western AustraliaCrawleyWA 6009Australia

High penetration of solar energy can result in voltage rise in midday,while growth in residential air conditioning is the main contributor of overloading and voltage drop issues during peak demand *** paper provides a hierarchical control scheme to coordinate multiple groups of aggregated thermostatically controlled loads to regulate network loading and voltage in a distribution *** the limited number of messages that can be exchanged in a realistic communication environment,an event-triggered distributed control strategy is proposed in this *** intermittent on and off toggling of air conditioners,the required active power adjustment is shared among participating aggregators to solve the issue.A case study is conducted and simulation results are presented to demonstrate the performance of the proposed control scheme.

关键词： Active distribution network eventbased distributed control network loading management thermostatically controlled loads voltage regulation

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宽波段7:3消偏振分光膜的设计及镀制

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红外与激光工程 2013年第5期42卷 1302-1305页

作者：高晓丹武汉东湖学院电子信息工程学院湖北武汉430212

分光膜在倾斜使用时会存在较强的偏振效应，通常采用各种措施来减小这种偏振效应的影响，但基本上只能在单一波长或较窄波段范围内实现消偏振分光，其波段范围几乎不超过50nm。根据设计要求运用解析法设计出一个合适的初始膜系，再在所... 详细信息

分光膜在倾斜使用时会存在较强的偏振效应，通常采用各种措施来减小这种偏振效应的影响，但基本上只能在单一波长或较窄波段范围内实现消偏振分光，其波段范围几乎不超过50nm。根据设计要求运用解析法设计出一个合适的初始膜系，再在所设计的初始膜系基础上，运用TFCalc膜系设计软件采用解析法、Needle和变尺度优化法综合设计了45。入射1260～1360nm波段7：3消偏振分光膜，分析了该设计膜系的监控曲线以评价其可镀制性，并采用德国莱宝APS1104型镀膜机对所设计的膜系进行了实际镀制，获得了性能优良的45。入射宽波段7：3消偏振分光膜。

关键词：分光膜消偏振膜系优化设计镀制工艺

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光纤尾纤波分复用滤光膜的研制

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红外与激光工程 2015年第3期44卷 955-958页

作者：高晓丹武汉东湖学院电子信息工程学院湖北武汉430212

根据光纤通信无源器件对光学薄膜的特殊需求,要求在光纤尾纤上镀制较复杂的波分复用滤光膜,针对光纤镀膜所存在的难点问题,利用TFCalc膜系设计软件采用解析法设计出一个初始的规整膜系,再结合梯度优化法在该规整膜系上有选择性的局部优... 详细信息

根据光纤通信无源器件对光学薄膜的特殊需求,要求在光纤尾纤上镀制较复杂的波分复用滤光膜,针对光纤镀膜所存在的难点问题,利用TFCalc膜系设计软件采用解析法设计出一个初始的规整膜系,再结合梯度优化法在该规整膜系上有选择性的局部优化,并考虑镀膜设备所允许的膜层灵敏度,评估其鲁棒性和可镀制性,从而设计出满足光谱特性要求的滤光膜膜系。然后通过对德国莱宝APS1104型镀膜机进行内部结构改造并选择合适的冷镀工艺,最终采用离子源辅助沉积对所设计的膜系进行了实际镀制,获得了性能优良的光纤尾纤波分复用滤光膜。

关键词：波分复用滤光膜光纤尾纤膜系镀制工艺

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Assessment of the dietary amino acid profiles and the relative biomarkers for amino acid balance in the low-protein diets for broiler chickens

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Journal of Animal Science and Biotechnology 2025年第1期16卷 238-266页

作者： Bin Wang xiaodan Zhang Yongfa Liu Mingkun gao Mi Wang Yuan Wang Xinzhi Wang Yuming Guo State Key Laboratory of Animal Nutrition and Feeding College of Animal Science and TechnologyChina Agricultural UniversityBeijing 100193China Shenyang Boeing Feed Company Shenyang 110141China

Background Research on low-protein-level diets has indicated that even though the profiles of essential amino acids(EAAs)follow the recommendation for a normal-protein-level diet,broilers fed low-protein diets failed to achieve pro-ductive performance compared to those fed normal ***,it is imperative to reassess the optimum profile of EAAs in low-protein diets and establish a new ideal pattern for amino acid ***,identifying novel sensitive biomarkers for assessing amino acid balance will greatly facilitate the development of amino acid nutrition and application *** this study,12 dietary treatments[Con(+),Con(-),L&A(-),L&A(+),M&C(-),M&C(+),BCAA(-),BCAA(+),Thr(-),Thr(+),Trp(-)and Trp(+)]were established by combining different EAAs including lysine and argi-nine,methionine and cysteine,branched-chain amino acid(BCAA),threonine,and tryptophan to observe the growth and development of the broiler chickens fed with low-protein-level *** on the biochemical parameters and untargeted metabolomic analysis of animals subjected to different treatments,biomarkers associated with opti-mal and suboptimal amino acid balance were *** Growth performance,carcass characteristics,hepatic enzyme activity,serum biochemical parameters,and breast muscle mRNA expression differed significantly between male and female broilers under different dietary amino acid *** broilers exhibited higher sensitivity to the adjustment of amino acid patterns than female *** the low-protein diet,the dietary concentrations of lysine,arginine,and tryptophan,but not of methionine,cystine,or threonine,needed to be ***,further research on individual BCAA is *** untar-geted metabolomic analysis,Con(+)was selected as a normal diet(NP)while Con(-)represented a low-protein diet(LP).L&A(+)denotes a low-protein amino acid balanced diet(LPAB)and Thr(+)represents a low-protein amino acid imbalance diet(LPAI).The metaboli

关键词： Amino acid balance Biomarkers Essential amino acid Low-protein diet Metabolomics

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光纤到户单纤三向截止滤光片的研制

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红外与激光工程 2011年第8期40卷 1508-1511页

作者：高晓丹葛卫龙武汉东湖学院电子信息工程学院湖北武汉430212 海军工程大学兵器工程系湖北武汉430033

单纤三向技术是无源光接入网实现音频、视频、数据集成传输的关键技术。用光学薄膜实现无源光网络的波分复用要求部分滤光片的入射角为45°,大角度入射会造成s偏振光和p偏振光分离,为了减少信道间的干扰,要求滤光片在45°入射的情况下,... 详细信息

单纤三向技术是无源光接入网实现音频、视频、数据集成传输的关键技术。用光学薄膜实现无源光网络的波分复用要求部分滤光片的入射角为45°,大角度入射会造成s偏振光和p偏振光分离,为了减少信道间的干扰,要求滤光片在45°入射的情况下,同时具有低插入损耗和高通带隔离度,按照常规膜系设计方法及镀制工艺,很难镀制成功。采用解析法和自动优化法综合设计了45°入射单纤三向干涉截止滤光片,分析了膜厚改变2%对设计膜系透过率曲线及参数的影响,采用德国莱宝APS1104型镀膜机,针对所设计的非规整膜系选择合适的镀制工艺进行实际镀制,获得了性能优良的大角度入射单纤三向截止滤光片。

关键词： 45°入射滤光片单纤三向优化设计非规整膜系

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Influence of Structure Parameters on Performance of the Thermoelectric Module

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Journal of Wuhan University of Technology(Materials Science) 2011年第3期26卷 464-468页

作者：杜群贵 School of Mechanical and Auto Engineering South China University of Technology

A numerical model of thermoelectric module （TEM） is created by academic analysis,and the impacts of the resistance ratio and thermoelement size on the output power and thermoelectric efficiency of the TEM are analyzed by the MATLAB numerical *** numerical model is validated by the ANSYS thermal,electrical,and structural coupling *** effects of the variable physical property parameters and contact effect on the output power and thermoelectric efficiency are evaluated,and the concept of aspect ratio optimal domain is proposed,which provides a new design approach for the TEM.

关键词： thermoelectric module (TEM) thermoelement contact effect variable physical property parameters output power thermoelectric efficiency

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