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Building Simulation 2021年第4期14卷 1005-1016页

作者： shaobo sun Huanxin Chen Department of Refrigeration&Cryogenics Engineering School of Energy and Power EngineeringHuazhong University of Science and TechnologyWuhanChina

The studies on predicting the energy consumption of air conditioning systems are meaningful to building energy conservation and management. Generally, the more comprehensive the building information is, the easier the prediction model can be developed. However, it is very difficult to get detailed information about existing/old buildings (information-poor buildings), it is a big challenge to predict the energy consumption accurately by limited information. This study aims to predict the electricity consumption of the water source heat pump system of an office building based on meteorological data. The key variables are selected by error analysis and sensitivity analysis, and the effects of each variable on the models’ prediction performance can be obtained. Besides, the prediction models are established by support vector regression algorithm and trained by the local meteorological data. The results show that the positive and negative variables can be identified, and these positive variables are responsible for more than 70% of the total importance. Moreover, the root mean square error falls to 4.6044 from 7.8227 and the relative square error falls to 0.1494 from 0.4313 when the negative inputs are removed. And the errors reduce further to 4.1160 and 0.1194 by parameter optimization.

关键词： water source heat pump electricity consumption support vector regression prediction sensitivity analysis parameter optimization

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滴灌系统叠片过滤器结构参数优化

农业工程学报 2024年第7期40卷 133-141页

作者：袁寄望朱德兰孙少博郑长娟 KHUDAYBERDI Nazarov 柳昌新西北农林科技大学水利与建筑工程学院杨凌712100 西北农林科技大学旱区农业水土工程教育部重点实验室杨凌712100 塔什干国立农业大学农业生物学院塔什干100140

针对不同级配含沙水和灌水器类型的叠片过滤器结构选型问题,该研究选取常用叠片过滤器,通过组合不同叠片数量改变相邻叠片间孔径,设计了多种不同泥沙处理能力的过滤器。对5种泥沙粒径级配条件下5种孔径叠片过滤器的性能开展试验研究,根... 详细信息

针对不同级配含沙水和灌水器类型的叠片过滤器结构选型问题,该研究选取常用叠片过滤器,通过组合不同叠片数量改变相邻叠片间孔径,设计了多种不同泥沙处理能力的过滤器。对5种泥沙粒径级配条件下5种孔径叠片过滤器的性能开展试验研究,根据不同工况下叠片过滤器运行周期内的水头损失、堵塞时段水头损失增长速率、过滤器的堵塞均匀度以及灌水器流量偏差率等指标,采用模糊数学综合评价方法,构建综合考虑灌溉含沙水、叠片过滤器和滴灌灌水器的多目标评价模型。结果表明:基于叠片孔径可调的过滤器可以实现拦截不同粒径范围泥沙的目标,5种孔径过滤器拦截泥沙粒径(拦截率大于90%的沙粒段中最小粒径级配的中值粒径)分别为49、82、100、127和150μm;随着过滤器孔径减小,粒径越细小的含沙水对水头损失增大作用越显著。不同级配含沙水和灌水器类型条件下叠片过滤器性能综合评价结果与试验结果相符,通过对综合评价指标值排序,筛选出灌溉含沙水、过滤器、灌水器三者最优的匹配方式,能够同时实现灌水器堵塞程度轻微和过滤器性能稳定。提出的叠片过滤器结构参数配置决策方案,可为叠片过滤器的合理配置和使用提供参考。

关键词：滴灌叠片过滤器灌水器水力性能优化配置

Impacts of technology-guided occupant behavior on air-conditioning system control and building energy use

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Building Simulation 2021年第1期14卷 209-217页

作者： Rui Tang Shengwei Wang shaobo sun Department of Building Services Engineering The Hong Kong Polytechnic UniversityKowloonHong KongChina

Occupant behavior is an important factor affecting building energy *** studies have been conducted recently to model occupant behavior and analyze its impact on building energy ***,to achieve a reduction of energy consumption in buildings,the coordination between occupant behavior and energy-efficient technologies are essential to be considered simultaneously rather than separately considering the development of technologies and the analysis of occupant *** is important to utilize energy-efficient technologies to guide the occupants to avoid unnecessary energy *** study,therefore,proposes a new concept,“technology-guided occupant behavior”to coordinate occupant behavior with energy-efficient technologies for building energy *** occupants are involved into the control loop of central air-conditioning systems by actively responding to their cooling ***-site tests are conducted in a Hong Kong campus building to analyze the performance of“technology-guided occupant behavior”on building energy *** to the measured data,the occupant behavior guided by the technology could achieve“cooling on demand”principle and hence reduce the energy consumption of central air-conditioning system in the test building about 23.5%,which accounts for about 7.8%of total building electricity use.

关键词： occupant behavior occupancy detection cooling demand control energy consumption HVAC system

Validation of virtual sensor-assisted Bayesian inference-based in-situ sensor calibration strategy for building HVAC systems

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Building Simulation 2023年第2期16卷 185-203页

作者： Guannan Li Jiahao Xiong shaobo sun Jian Chen School of Urban Construction Wuhan University of Science and TechnologyWuhan 430065China Department of Building Environment and Energy Engineering The Hong Kong Polytechnic UniversityHong KongChina

For building heating,ventilation and air-conditioning systems(HVACs),sensor faults significantly affect the operation and *** with accurate and reliable measurements are critical for ensuring the precise indoor thermal *** to its high calibration accuracy and in-situ effectiveness,a virtual sensor(VS)-assisted Bayesian inference(VS-BI)sensor calibration strategy has been applied for ***,the application feasibility of this strategy for wider ranges of different sensor types(within-control-loop and out-of-control-loop)with various sensor bias fault amplitudes,and influencing factors that affect the practical in-situ calibration performance are still remained to be ***,to further validate its in-situ calibration performance and analyze the influencing factors,this study applied the VS-BI strategy in a HVAC system including a chiller plant with air handle unit(AHU)*** target sensors including air supply(SAT),chilled water supply(CHS)and cooling water return(CWR)temperatures are investigated using introduced sensor bias faults with eight different amplitudes of[−2℃,+2℃]with a 0.5℃ *** performance is evaluated by considering three influencing factors:(1)performance of different data-driven VSs,(2)the influence of prior standard deviationsσon in-situ sensor calibration and(3)the influence of data quality on in-situ sensor calibration from the perspective of energy conservation and data *** comparison,a long short term memory(LSTM)is adopted for VS construction with determination coefficient R-squared of *** indicate thatσhas almost no impact on calibration accuracy of CHS but scanty impact on that of SAT and *** potential of using a prior standard deviationσto improve the calibration accuracy is limited,only 8.61%on *** system within-control-loop sensors like SAT and CHS,VS-BI obtains relatively high in-situ sensor calibration accuracy if the data quality is relatively hig

关键词： heating,ventilation and air-conditioning(HVAC) in-situ sensor calibration Bayesian inference(BI) virtual sensor(VS) influencing factor energy conservation(EC)

Selective laser melting of Al–8.5Fe–1.3V–1.7Si alloy: Investigation on the resultant microstructure and hardness

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Chinese Journal of Aeronautics 2015年第2期28卷 564-569页

作者： Zheng Lijing Liu Yingying sun shaobo Zhang Hu School of Materials Science and Engineering Beihang University

This article presents the microstructure and hardness variation of an Al 8.5Fe-1.3V 1.7Si （wt%, FVS0812） alloy after selective laser melting （SLM） modification. Three zones were distinguished across the melting pool of the SLM-processed FVS0812 alloy： the laser melted zone （LMZ）, the melting pool border, and the heat affected zone （HAZ） in the previously deposited area around the melting pool. Inside the LMZ, either an extremely fine cellular-dendritic structure or a mixture zone of the α-Al matrix and nanoscale Al12（Fe,V）3Si particles appeared. With a decreased laser beam scanning speed, the cellular-dendritic structure zone within the LMZ shrank significantly while the mixture zone expanded. The α-Al and Al12（Fe,V）3Si mixture zone was also observed in the HAZ, but another phase, submicron θ-Al13Fe4 particles with rectangular or hexagonal shapes, formed along the melting pool border. Microhardness tests indicated that the hardness of the SLM-processed FVS0812 samples far exceeded that of the as-cast FVS0812 alloy.

关键词： Al-Fe-V-Si alloys Hardness Melting pool Microstructure Selective laser melting

Sc对铸造Al-Li合金组织演变及力学性能的影响

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特种铸造及有色合金 2024年第1期44卷 74-79页

作者：胡奎深邹鹑鸣孙少波肖瑞王宏伟魏尊杰哈尔滨工业大学金属精密热加工国家级重点实验室哈尔滨150006 北京航星机器制造有限公司北京100006

研究了Sc合金化对铸造Al-Li-Cu-Mg合金组织演变和力学性能的影响。结果表明,添加0.2%的Sc对合金晶粒细化效果显著,同时Sc合金化还会促进时效态合金基体中核/壳状复合结构粒子的析出。在室温及200℃下拉伸时,含Sc合金显示出更优异的强塑... 详细信息

研究了Sc合金化对铸造Al-Li-Cu-Mg合金组织演变和力学性能的影响。结果表明,添加0.2%的Sc对合金晶粒细化效果显著,同时Sc合金化还会促进时效态合金基体中核/壳状复合结构粒子的析出。在室温及200℃下拉伸时,含Sc合金显示出更优异的强塑匹配性,这归因于细化强化和沉淀强化(δ′-Al3Li相及核/壳状复合结构粒子)的综合作用;当拉伸试验温度升高至300℃时,晶界弱化效应使含Sc合金的强度急剧下降而伸长率显著提升。断口形貌观察发现,基准合金室温的断裂模式为准解理断裂,温度对合金的断裂模式无显著影响;含Sc合金室温的断裂模式为典型的沿晶断裂,200℃下该合金的断裂模式转变为沿晶和穿晶混合断裂,拉伸试验温度提高至300℃,断裂模式最终变为微孔聚集型断裂。

关键词：铸造Al-Li合金 Sc合金化力学性能断裂模式

海河平原典型区表层土壤有机碳库变化及影响因素——以天津市津南区为例

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农业资源与环境学报 2024年第4期41卷 816-825页

作者：李硕刘汉粮孙少波刘永涛程绪江张亚娜天津市地质调查研究院天津300191 自然资源部地球化学探测重点实验室中国地质科学院地球物理地球化学勘查研究所河北廊坊065000 天津大学地球系统科学学院表层地球系统科学研究院天津300072

为探究海河平原典型区表层土壤有机碳库的变化及其主要影响因素,本研究基于1980年和2016年两期土壤调查数据,采用地统计学方法分析了天津市津南区土壤有机碳密度(SOCD)及土壤有机碳库的变化,运用线性回归和随机森林模型分析了土壤有机碳... 详细信息

为探究海河平原典型区表层土壤有机碳库的变化及其主要影响因素,本研究基于1980年和2016年两期土壤调查数据,采用地统计学方法分析了天津市津南区土壤有机碳密度(SOCD)及土壤有机碳库的变化,运用线性回归和随机森林模型分析了土壤有机碳(SOC)主要影响因素。结果显示:津南区表层土壤有机碳库2016年储量为1.14×10^(6)t,比1980年增加了6.61×10^(4)t;SOCD与成土母质关系密切,不同时期SOCD都表现出冲积物>冲积-海积物>湖沼积物这一规律;两期SOCD高值区分布基本一致,主要分布在津南区西北部及中部咸水沽镇附近,1980—2016年SOCD变化有“北减南增”的趋势;有机碳变化(∆SOC)受土壤理化性质及土地利用变更(LUC)共同影响,其中土壤全氮含量变化(∆TN)、碳氮比(C/N)变化、氮磷比(N/P)变化与∆SOC呈极显著正相关(P<0.01),土壤有机碳初始值(ISOC)、CaO含量、pH变化(∆pH)与∆SOC呈显著负相关(P<0.05)。研究表明,土壤有机碳库在农用地向城镇用地转换时表现为“碳源”,而农用地性质不变时表现为“碳汇”,∆TN、C/N变化、N/P变化和LUC在SOC动态变化中起重要作用。

关键词：土壤有机碳时空分布随机森林海河平原

Copper Nitrate-Mediated Selective Bond Cleavage of Alkynes:Diverse Synthesis of Isoxazoles

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Chinese Journal of Chemistry 2023年第23期41卷 3299-3304页

作者： Jianan Liu Kaijing Zhou shaobo sun Mingchun Gao Bin Xu Department of Chemistry Affiliated Nantong Hospital of Shanghai University (The Sixth People's Hospital of Nantong)Shanghai Engineering Research Center of Organ RepairInnovative Drug Research CenterSchool of MedicineShanghai UniversityShanghai200444 China Qianweichang College Shanghai UniversityShanghai200444 China State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai200032 China

An unprecedented copper nitrate-mediated bond cleavage of alkynes was developed for the modular synthesis of isoxazoles,where either C—S bond or C≡C triple bond was cleaved *** attached to the C≡C triple bonds could differentiate the chemical bonds cleavage and reaction pathways *** transformations of products illustrate promising applications of the given protocols.

关键词： Alkynes Bond cleavage Copper nitrate Cyclization Isoxazoles Molecular diversity N-Heterocycles Substituent effects

Dynamics of the Fractional-Order Lorenz System Based on Adomian Decomposition Method and Its DSP Implementation

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IEEE/CAA Journal of Automatica Sinica 2024年第5期11卷 1298-1300页

作者： shaobo He Kehui sun Huihai Wang School of Physics and Electronics Central South UniversityChangshaHunan 410083China School of Automation and Electronic Information Xiangtan UniversityXiangtan 411105China School of Physics Central South UniversityChangsha 410083China School of Electronic Information Central South UniversityChangsha 410083China

Dear Editor,Dynamics and digital circuit implementation of the fractional-order Lorenz system are investigated by employing Adomian decomposition method(ADM).Dynamics of the fractional-order Lorenz system with derivat... 详细信息

关键词： diagram fractional system

Comparative Study on Wire-Arc Additive Manufacturing and Conventional Casting of Al–Si Alloys:Porosity,Microstructure and Mechanical Property

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Acta Metallurgica Sinica(English Letters) 2022年第3期35卷 475-485页

作者： Yueling Guo Qifei Han Jinlong Hu Xinghai Yang Pengcheng Mao Junsheng Wang shaobo sun Zhi He Jiping Lu Changmeng Liu School of Mechanical Engineering Beijing Institute of TechnologyBeijing 100081China School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China Center for Micro and Nano Technologies Beijing Institute of TechnologyBeijing 100081China Advanced Research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijing 100081China Beijing Hangxing Machinery Manufacturing Co. Ltd.Beijing 100013China

Here,we compare the porosity,microstructure and mechanical property of 4047 Al–Si alloys prepared by wire-arc additive manufacturing(WAAM)and conventional casting.X-ray microscopy reveals that WAAM causes a higher volume fraction of gas pores in comparison with conventional *** refi nements ofα-Al dendrites,eutectic Si particles and Ferich intermetallic compounds are achieved by WAAM,resulting from its rapid solidifi cation *** ultimate tensile strength(UTS,up to 205.6 MPa)and yield stress(YS,up to 98.0 MPa)are improved by WAAM at the expense of elongation after *** mechanical property anisotropy between scanning direction and build direction is minimal for alloys via *** microstructure refi nement and strength enhancement are enabled by increasing the travel speed of welding torch from 300 to 420 mm/min.

关键词： Wire-arc additive manufacturing Al–Si alloy Porosity Microstructure Strength