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不同流量下泵前微压网式过滤器内部流场的数值模拟

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节水灌溉 2024年第5期 59-65页

作者：陈领伟陶洪飞马合木江·艾合买提李巧姜有为新疆农业大学水利与土木工程学院乌鲁木齐830052 新疆水利工程安全与水灾害防治重点实验室乌鲁木齐830052

泵前微压网式过滤器作为一种新型的灌溉过滤装置,具有结构简单、适配性高以及能耗低等优点。为了探究泵前微压网式过滤器内部流场的运行状态,采用了物理模型试验、数值计算及理论分析的方法,从微观角度对清水条件下泵前微压网式过滤器... 详细信息

泵前微压网式过滤器作为一种新型的灌溉过滤装置,具有结构简单、适配性高以及能耗低等优点。为了探究泵前微压网式过滤器内部流场的运行状态,采用了物理模型试验、数值计算及理论分析的方法,从微观角度对清水条件下泵前微压网式过滤器在不同流量(5、8、11、14、17 m^(3)/h)的水力性能和水流运动状态进行分析。结果表明:标准k-ε模型可作为模拟泵前微压网式过滤器清水流场的湍流模型;滤网内部流速分布不均匀,随流量呈现不同形态的“火烛”形态,出水口对过滤器内部影响范围随流量增加而增大;过滤器内部同时出现高压区和负压区,滤网底部为水头损失主要发生位置。研究成果可为泵前过滤设备的浑水数值模拟和结构优化提供理论和技术支撑。

关键词：泵前微压过滤器水头损失数值模拟云图

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Three-Body Photodissociation of Thionyl Chloride

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Chinese Journal of Chemical Physics 2018年第3期31卷 257-262,367页

作者： Bumaliya Abulimiti qiao-li Hao Chen Qin Mei Xiang Bing Zhang College of Physics and Electronic Engineering Xinjiang Normal UniversityUrumqi 830054China State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics and MathematicsChinese Academy of SciencesWuhan 430071China

The ultrafast photodissociation dynamics of thionyl chloride after excitation with a 235 nm pump pulse has been studied using a femtosecond time-resolved mass *** observed parent transient suggests that the excited states initiated by 235 nm are very shortlived,that is,approximately 166 *** only a stepwise three-body dissociation pathway but also a concerted three-body dissociation pathway is observed.

关键词： Photodissociation Thionyl chloride Three-body Time-resolved study

A Fuzzy Hierarchical Strategy for Improving Frequency Regulation of Battery Energy Storage System

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Journal of Modern Power Systems and Clean Energy 2021年第4期9卷 689-698页

作者： Kaifeng Wang Ying qiao Lirong Xie Jiaming Li Zongxiang Lu Huan Yang School of Electrical Engineering Xinjiang UniversityUrumqiChina State Key Laboratory of Control and Simulation of Power Systems Generation Equipments of Electrical Engineering Tsinghua UniversityBeijingChina

Battery energy storage systems(BESSs)can provide instantaneous support for frequency regulation(FR)because of their fast response ***,purely pursuing a better FR effect calls for continually rapid cycles of BESSs,which shortens their lifetime and deteriorates the operational *** coordinate the lifespan savings and the FR effect,this paper presents a control strategy for the FR of BESSs based on fuzzy logic and hierarchical *** fuzzy logic controller improves the effect of FR by adjusting the charging/discharging power of the BESS with a higher response speed and precision based on the area control error(ACE)signal and the change rate of ACE in a non-linear *** controllers effectively reduce the life loss by optimizing the depth of discharge,which ensures that the state of charge(SOC)of BESS is always in the optimal operating range,and the total FR cost is the lowest at this *** proposed method can achieve the optimal balance between ACE reduction and operational economy of *** effectiveness of the proposed strategy is verified in a two-area power system.

关键词： Battery energy storage system(BESS) frequency regulation(FR) coordinated control strategy optimal depth of discharge charging/discharging threshold

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4种不同品种玫瑰精油的检测及成分分析

中国调味品 2024年第8期49卷 149-154页

作者：陶永霞安比芳陈创业乔桂芳冯作山新疆农业大学食品科学与药学学院乌鲁木齐830052

试验以大马士革玫瑰、紫枝玫瑰、丰花玫瑰、苦水玫瑰为研究对象,利用水蒸气蒸馏法从4种玫瑰中提取精油,采用气相色谱-质谱法(GC-MS)对不同品种玫瑰精油挥发性物质进行定性定量分析,并通过主成分分析(PCA)和聚类分析(CA)对玫瑰精油进行... 详细信息

试验以大马士革玫瑰、紫枝玫瑰、丰花玫瑰、苦水玫瑰为研究对象,利用水蒸气蒸馏法从4种玫瑰中提取精油,采用气相色谱-质谱法(GC-MS)对不同品种玫瑰精油挥发性物质进行定性定量分析,并通过主成分分析(PCA)和聚类分析(CA)对玫瑰精油进行判定、区分和聚集。结果表明,GC-MS检测得到玫瑰精油含有65种挥发性物质,对其进行主成分分析,可以简化为3个主成分,前两个主成分的累计方差贡献率为81.952%,可反映玫瑰的大部分信息,通过主成分分析将4种玫瑰精油分为两大类:大马士革玫瑰精油和紫枝玫瑰精油为一类,丰花玫瑰精油和苦水玫瑰精油为一类。不同玫瑰品种挥发性物质组成多样,该研究以期为今后的精油提取和分析提供一定的理论基础。

关键词： 4种玫瑰精油水蒸气蒸馏法气相色谱-质谱法(GC-MS) 主成分分析(PCA) 聚类分析(CA)

BOUNDEDNESS OF THE HIGHER-DIMENSIONAL QUASILINEAR CHEMOTAXIS SYSTEM WITH GENERALIZED LOGISTIC SOURCE

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Acta Mathematica Scientia 2020年第3期40卷 713-722页

作者： Qingquan TANG qiao XIN Chunlai MU College of Mathmatics and Statistics Yili Normal UniversityYining 835000China College of Mathmatics and Statistics Chongqing UniversityChongqing 401331China

This article considers the following higher-dimensional quasilinear parabolic-parabolic-ODE chemotaxis system with generalized Logistic source and homogeneous Neumann boundary conditions{ut=∇⋅(D(u)∇u)−∇⋅(S(u)∇v)+f(u),x∈Ω,t>0 vt=Δv+w−v,x∈Ω,t>0,wt=u−w,x∈Ω,t>0,in a bounded domainΩ⊂R^n(n≥2)with smooth boundary ∂Ω,where the diffusion coefficient D(u)and the chemotactic sensitivity function S(u)are supposed to satisfy D(u)≥M1(u+1)^−αand S(u)≤M2(u+1)^β,respectively,where M1,M2>0 and α,β∈***,the logistic source f(u)is supposed to satisfy f(u)≤a−μu^γ with μ>0,γ≥1,and a≥***α+2β<γ−1+2γ/n,we show that the solution of the above chemotaxis system with sufficiently smooth nonnegative initial data is uniformly bounded.

关键词： Chemotaxis system logistic source global solution boundedness

Safety Risk Assessment of Overturning Construction of Towering Structure Based on Cloud Matter–Element Coupled Model

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Computer Modeling in Engineering & Sciences 2023年第8期136卷 1973-1998页

作者： Yingxue Sang Fengxia Han Qing Liu Liang qiao Shouxi Wang School of Architecture and Engineering Xinjiang UniversityUrumqi830017China xinjiang Key Lab of Building Structure and Earthquake Resistance Urumqi830017China China Railway No.21 Bureau Group No.1 Engineering Co. Ltd.Urumqi830026China

Rapid urbanization has led to a surge in the number of towering structures,and overturning is widely used because it can better accommodate the construction of shaped structures such as variable *** complexity of the construction process makes the construction risk have certain randomness,so this paper proposes a cloudbased coupled matter-element model to address the ambiguity and randomness in the safety risk assessment of overturning construction of towering *** the pretended model,the digital eigenvalues of the cloud model are used to replace the eigenvalues in the matter–element basic element,and calculate the cloud correlation of the risk assessment metrics through the correlation algorithm of the cloud model to build the computational ***,the improved hierarchical analysis method based on the cloud model is used to determine the weight of the *** comprehensive evaluation scores of the evaluation event are then obtained through the weighted average method,and the safety risk level is determined *** empirical analysis,(1)the improved hierarchical analysis method based on the cloud model can incorporate the data of multiple decisionmakers into the calculation formula to determine theweights,which makes the assessment resultsmore credible;(2)the evaluation results of the cloud-basedmatter-element coupledmodelmethod are basically consistent with those of the other two commonly used methods,and the confidence factor is less than 0.05,indicating that the cloudbased physical element coupled model method is reasonable and practical for towering structure overturning;(3)the cloud-based coupled element model method,which confirms the reliability of risk level by performing Spearman correlation on comprehensive assessment scores,can provide more comprehensive information of instances compared with other methods,and more comprehensively reflects the fuzzy uncertainty relationship between assessment indexes,which makes th

关键词： Cloud matter-element model clouded hierarchical analysis method towering structure overturning formwork construction risk assessment

应用心理学本科生“五位一体”导师制的探索与实践

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兵团教育学院学报 2024年第2期34卷 47-52页

作者：毕爱红郑婷麻超乔亲才石河子大学师范学院新疆石河子832003 石河子大学心理应用研究中心新疆石河子832003

基于应用心理学本科生人才培养方案的培养目标,探索形成应用心理学本科生“五位一体”导师制,即一种将“教-学-做-赛-研”多维并举的教学模式与导师制相结合,从而满足人才培养的全面和个性化需要,最终形成适用于应用心理学的人才培养模式。

关键词：应用心理学本科生导师制 "五位一体"

基于PPR和NSGA-Ⅱ的泵前微压过滤器水力与过滤性能研究

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灌溉排水学报 2024年第5期43卷 30-37,78页

作者：陶洪飞李琦周洋马合木江·艾合买提李巧姜有为新疆农业大学水利与土木工程学院乌鲁木齐830052 新疆水利工程安全与水灾害防治重点实验室乌鲁木齐830052 新疆水利水电科学研究院乌鲁木齐830049

【目的】探究泵前微压过滤器的性能。【方法】开展5组流量(2~8m^(3)/h)、5组含沙量(0.5~2.0g/L)、3组滤网过滤面积(1 105、1 582、2 060 cm^(2))和4组分水器型式(不加、1型、2型、3型)的物理模型试验,采用投影寻踪回归分析法(PPR)、多... 详细信息

【目的】探究泵前微压过滤器的性能。【方法】开展5组流量(2~8m^(3)/h)、5组含沙量(0.5~2.0g/L)、3组滤网过滤面积(1 105、1 582、2 060 cm^(2))和4组分水器型式(不加、1型、2型、3型)的物理模型试验,采用投影寻踪回归分析法(PPR)、多目标遗传算法(NSGA-Ⅱ),建立水头损失、截沙质量和总过滤效率的预测模型,探究各指标的影响因素排序,确定泵前微压过滤器的最佳运行工况。【结果】影响泵前微压过滤器水头损失的因素排序为进水流量?含沙量?滤网过滤面积;影响截沙质量的因素排序为含沙量?滤网过滤面积?进水流量;影响总过滤效率的因素排序为滤网过滤面积?含沙量?进水流量;以相对误差≤10%作为判定标准,建立的截沙质量和总过滤效率PPR预测模型合格率为100%,模型精度较高,但水头损失PPR预测模型合格率仅为70%,模型不可靠。本试验范围下泵前微压过滤器的最佳运行工况为:含沙量2 g/L、进水流量7 m^(3)/h、滤网过滤面积2 060 cm^(2)。【结论】PPR预测模型对截沙质量和总过滤效率的预测精度较高,对水头损失的预测误差较大,在后期可用量纲分析与多元回归相结合预测水头损失、截沙质量和总过滤效率。

关键词：过滤器水头损失模型水力性能过滤性能

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基于改进XLNet算法的震后舆情分析研究——以甘肃积石山县6.2级和新疆乌什县7.1级地震为例

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地震工程学报 2024年第4期46卷 955-964页

作者：郑通彦王尅丰黄猛张淞周文涛游巧刘帅中国地震台网中心北京100045 防灾科技学院河北三河065201

震后对网络舆情信息的监控与分析,对于相关部门开展震灾应急救援、掌握救灾动态、稳定民众情绪具有重要意义。为解决震后舆情信息数据量大、语言多义性等问题,文章使用自回归模型(XLNet)作为文本向量化表示层,将社交媒体地震数据文本转... 详细信息

震后对网络舆情信息的监控与分析,对于相关部门开展震灾应急救援、掌握救灾动态、稳定民众情绪具有重要意义。为解决震后舆情信息数据量大、语言多义性等问题,文章使用自回归模型(XLNet)作为文本向量化表示层,将社交媒体地震数据文本转化为包含上下文语义信息的媒体数据词向量,同时,使用双向门控循环单元(BiGRU)网络作为特征提取层,把词向量序列输入到BiGRU层,提取社交媒体地震数据的文本特征;将初步提取特征的文本输入到注意力机制层(Attention),进一步提取更为重要的情感类别特征,并对重要特征进行权重强化,构建基于网络地震应急处置信息改进的XLNet-BiGRU-Att地震舆情情感分析模型;最终,获得社交媒体地震数据的舆情态势。相比传统的XLNet模型,文章模型在甘肃积石山县6.2级与新疆乌什县7.1级地震的舆情情感分析中能够准确\,快速捕捉长短文本数据特征,分析舆情态势,情感分析准确率分别提升到92.45%和93.42%。

关键词：舆情分析 XLNet BiGRU 甘肃积石山新疆乌什