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基于数字孪生的服装生产线可视化管理架构

天津纺织科技 2024年第4期 25-28页

作者：张苏宁马大力内蒙古工业大学轻工与纺织学院内蒙古呼和浩特010051 天津工业大学纺织科学与工程学院天津300387

为解决服装制造业现有生产线管理系统长期处于低效、滞后状态,进而导致生产效率下降问题,文章通过将数字孪生技术应用于服装生产管理中,构建并分析数字孪生技术流水线应用的4个关键模块,提出服装生产线可视化孪生体系架构。基于该架构,... 详细信息

为解决服装制造业现有生产线管理系统长期处于低效、滞后状态,进而导致生产效率下降问题,文章通过将数字孪生技术应用于服装生产管理中,构建并分析数字孪生技术流水线应用的4个关键模块,提出服装生产线可视化孪生体系架构。基于该架构,可将生产现场实时多源异构数据与生产实时状态进行可视化平台管理及展示,充分利用虚拟空间优势,赋能传统服装生产管理模式,建立生产与管理间的快速响应机制,为服装企业提升管理质量,提高生产效率。

关键词：数字孪生服装生产线可视化生产管理

优势乳酸发酵菌株筛选、鉴定及对发酵萝卜风味品质的影响

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食品与机械 2024年第6期40卷 53-61页

作者：阿丽亚·阿达力梅时勇张冀芳贺正金中国农业科学院麻类研究所湖南长沙410000

[目的]筛选优良乳酸菌菌株以构建萝卜专用的泡菜发酵菌种。[方法]从不同地区收集萝卜老坛泡菜母水,采用稀释涂布法从泡菜母水中分离乳酸菌,通过生理鉴定、形态学鉴定(菌落观察和,革兰氏染色法)、16S rDNA基因测序和系统发育树构建确定... 详细信息

[目的]筛选优良乳酸菌菌株以构建萝卜专用的泡菜发酵菌种。[方法]从不同地区收集萝卜老坛泡菜母水,采用稀释涂布法从泡菜母水中分离乳酸菌,通过生理鉴定、形态学鉴定(菌落观察和,革兰氏染色法)、16S rDNA基因测序和系统发育树构建确定种类并对其生长特性、耐受能力和风味物质进行检测。[结果]分离筛选结合生理鉴定共获得120株菌株,其菌落为圆形凸起,镜检呈杆状或球状且均为革兰氏阳性菌。进一步通过产酸能力测试获得15株产酸能力较强的菌株。分子鉴定表明,1株为芽孢杆菌属、13株为植物乳杆菌属,1株为戊糖片球菌属。对不同类型发酵菌株进行生长特性分析,发现菌株LA-8与LA-11的生长速度比其他菌株快;菌株LA-8的产酸能力强,耐10%盐和15%蔗糖。4株不同类型菌株均具有较强的降解亚硝酸盐能力。萝卜发酵初试试验表明,菌株LA-8和LA-11的发酵能力较强,产酸速度快。4株不同类型乳酸菌发酵萝卜所产生的挥发性物质存在差异。[结论]从不同地区萝卜老坛泡菜母水中筛选得到3个不同类型的优势发酵菌,可作为萝卜泡菜产业生产的菌种来源。

关键词：老坛泡菜乳酸菌发酵筛选鉴定

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A blast furnace fault monitoring algorithm with low false alarm rate:Ensemble of greedy dynamic principal component analysis-Gaussian mixture model

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Chinese Journal of Chemical Engineering 2023年第5期57卷 151-161页

作者： Xiongzhuo Zhu dali Gao Chong Yang Chunjie Yang State Key Laboratory of Industrial Control Technology College of Control Science and EngineeringZhejiang UniversityHangzhou 310027China

The large blast furnace is essential equipment in the process of iron and steel manufacturing. Due to the complex operation process and frequent fluctuations of variables, conventional monitoring methods often bring false alarms. To address the above problem, an ensemble of greedy dynamic principal component analysis-Gaussian mixture model(EGDPCA-GMM) is proposed in this paper. First, PCA-GMM is introduced to deal with the collinearity and the non-Gaussian distribution of blast furnace ***, in order to explain the dynamics of data, the greedy algorithm is used to determine the extended variables and their corresponding time lags, so as to avoid introducing unnecessary noise. Then the bagging ensemble is adopted to cooperate with greedy extension to eliminate the randomness brought by the greedy algorithm and further reduce the false alarm rate(FAR) of monitoring results. Finally, the algorithm is applied to the blast furnace of a large iron and steel group in South China to verify *** with the basic algorithms, the proposed method achieves lowest FAR, while keeping missed alarm rate(MAR) remain stable.

关键词： Chemical processes Principal component analysis Gaussian mixture model Process monitoring Ensemble Process control

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基于用户习惯的某款纯电动乘用车能耗分析

中国汽车 2024年第2期 46-52页

作者：戴大力彭诚吴生玉合众新能源汽车股份有限公司嘉兴314000

纯电动汽车的能耗分析,汽车企业以及行业机构通常是利用转鼓对车辆进行某循环工况单次极限能量消耗量测试,得到关键部件的能量分布。然而,通过对用户的调研,该测试得到的能耗与用户实际出行习惯的“多天多次”能耗不同,同时业内对用户... 详细信息

纯电动汽车的能耗分析,汽车企业以及行业机构通常是利用转鼓对车辆进行某循环工况单次极限能量消耗量测试,得到关键部件的能量分布。然而,通过对用户的调研,该测试得到的能耗与用户实际出行习惯的“多天多次”能耗不同,同时业内对用户实际出行习惯的“多天多次”续航里程的测试研究较少。本研究是基于能耗计算模型,调取某款纯电车型一段时间的云数据,对该车型的能耗进行统计与分析。结果表明,该纯电动汽车的用户绝大部分的行驶习惯为短途行驶,短途行驶的平均整车电耗和平均电器电耗相对较高,平均整车电耗和平均电器电耗随着行驶里程增加呈现收敛趋势。结合地图分布的数据统计,南方用户的平均整车电耗相对较高,全国平均驱动能耗相差不大,整车电耗相差较大的原因是我国幅员辽阔,环境温度导致平均电器电耗产生差异。平均车速在10~40 km/h时,电驱动效率低于90%,是电机驱动效率优化的重点方向。

关键词：纯电动汽车能耗云数据

直接热成像银盐数字医疗胶片成像层交联剂的选择及优化

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信息记录材料 2024年第4期25卷 6-8页

作者：李万迎桑大力中国乐凯集团有限公司河北保定071054

性能、色调及连续过机是影响直接热成像银盐数字医疗胶片质量的重要因素,而成像层交联剂的种类及用量对上述因素有决定性的影响。本文对直接热成像银盐数字医疗胶片成像层交联剂种类进行了筛选及组合,并对其用量进行了优化,成功得到了... 详细信息

性能、色调及连续过机是影响直接热成像银盐数字医疗胶片质量的重要因素,而成像层交联剂的种类及用量对上述因素有决定性的影响。本文对直接热成像银盐数字医疗胶片成像层交联剂种类进行了筛选及组合,并对其用量进行了优化,成功得到了性能达标、色调良好、连续过机优良的胶片。

关键词：直接热成像成像层交联剂

Multi-dimensional band structure spectroscopy in the synthetic frequency dimension

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Light(Science & Applications) 2023年第7期12卷 1425-1433页

作者： dali Cheng Eran Lustig Kai Wang Shanhui Fan Ginzton Laboratory and Department of Electrical Engineering Stanford UniversityStanfordCA94305USA Department of Physics McGll UniversityMontrealQC H3A 2T8Canada

The concept of synthetic dimensions in photonics provides a versatile platform in exploring multi-dimensional *** of these physics are characterized by band structures in more than one *** efforts on band structure measurements in the photonic synthetic frequency dimension however are limited to either onedimensional Brillouin zones or one-dimensional subsets of multi-dimensional Billouin *** we theoretically propose and experimentally demonstrate a method to fully measure multi-dimensional band structures in the synthetic frequency *** use a single photonic resonator under dynamical modulation to create a multidimensional synthetic frequency *** show that the band structure of such a lattice over the entire multidimensional Brillouin zone can be measured by introducing a gauge potential into the lattice *** this method,we perform experimental measurements of two-dimensional band structures of a Hermitian and a non-Hermitian *** measurements reveal some of the general properties of point-gap topology of the non-Hermitian Hamiltonian in more than one *** results demonstrate experimental capabilities to fully characterize high-dimensional physical phenomena in the photonic synthetic frequency dimension.

关键词： resonator synthetic dimensional

Creep Behavior of Mullite Short Fiber Reinforced ZL109 Alloy Composites at High Temperature

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Journal of Materials Science & Technology 2001年第4期17卷 429-432页

作者： ShanlingWANG BaoluoSHEN ShensiGAO dali MingjingTU WeichengYU GeYAO DepartmentofMetallicMaterials SichuanUniversityChengdu610065China StateKeyLaboratoryforFatigueandFractureofMaterials InstituteofMetalResearchChineseAcademyofSciencesShenyang110016China

The creep behavior of ***2 fiber reinforced ZL109 composites has been investigated at four temperatures ranging from 553 to 623 K. The results show high stress exponent and high apparent creep activation energy. A good correlation between the normalized creep rate and normalized effective stress means that the true stress exponent of minimum creep strain rate of the composite is very close to 5, and the minimum creep strain rate is matrix lattice diffusion controlled. The threshold stress decreases with increasing temperature linearly and disappears at a temperature close to 623 K. It is assumed that the long range internal back stresses generated in creep reduce the load transfer to fibers and the interaction between dislocations and strengthening precipitates decreases at high temperature. At a high temperature where the long range internal back stresses is very close to the applied stress, the threshold stress disappears.

关键词： Metallic matrix composites

Oblivious Polynomial Evaluation

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Journal of Computer Science & Technology 2004年第4期19卷 550-554页

作者： Hong-dali Dong-YaoJi Deng-GuoFeng BaoLi StateKeyLabofInformationSecurity GraduateSchoolofChineseAcademyofSciencesBeijing100039P.R.China

The problem of two-party oblivious polynomial evaluation (OPE) is studied, where one party (Alice) has a polynomial P(x) and the other party (Bob) with an input x wants to learn P(x) in such an oblivious way that Bob obtains P(x) without learning any additional information about P except what is implied by P(x) and Alice does not know Bob's input x. The former OPE protocols are based on an intractability assumption except for OT protocols. In fact, evaluating P(x) is equivalent to computing the product of the coefficient vectors (a(0),...,a(n)) and (1,...,x(n)). Using this idea, an efficient scale product protocol of two vectors is proposed first and then two OPE protocols are presented which do not need any other cryptographic assumption except for OT protocol. Compared with the existing OPE protocol, another characteristic of the proposed protocols is the degree of the polynomial is private. Another OPE protocol works in case of existence of untrusted third party. Keywords oblivious polynomial evaluation, oblivious transfer, secure multi-party computation, information.

关键词： oblivious polynomial evaluation oblivious transfer secure multi-party computation information security

Trace Metals in Sediments, Macroalgae and Benthic Species from the Western Part of Algerian Coast

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Journal of Environmental Science and Engineering 2011年第12期5卷 1604-1612页

作者： W. Benguedda N. dali youcef R. Amara Department of Ecology and Environment University of Tlemcen Tlemcen 13000 Algeria Department of Biology University of Littoral-Opale Coast Wimereux 62930 France

The concentrations of Cd, Pb, Cu and Zn were measured in sediments and specimens of four marine organisms： green algae （Enteromorpha linza）, red algae （Corallina officinalis）, mollusc limpet （Patella ferruginea） and sea urchin （Paracentrotus lividus）. The samples were collected at four coastal stations located in two areas in the North-Western Algerian coast： Ghazaouet and Beni-saf. These areas are influenced by anthropogenic activities （harbour and industrial and urban wastes）. Metal concentrations measured in sediments and biota indicated that the area of Ghazaouet was the most polluted. We found high variability of metal bioaccumulation among the four species analysed. The highest concentrations were recorded in the algae whereas metal concentrations in sea urchin and limpet were more correlated with sediments metal concentrations.

关键词： Trace metals sediment marine algae benthic species Algeria.