检索结果-南通市图书馆

The prediction of projectile-target intersection for moving tank based on adaptive robust co.straint-following co.trol and interval uncertainty analysis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2024年第1期31卷 351-363页

作者： co.g Li Xiuye Wang Yuze Ma Fengjie Xu Guolai Yang The School of Mechanical Engineering Nanjing University of Science and TechnologyNanjing290014PR China inner mongolia north heavy industries co. Ltd.Baotou014033PR China Nanjing Chenguang group co. Ltd.Nanjing210006PR China

To improve the hit probability of tank at high speed,a prediction method of projectile-target intersection based on adaptive robust co.straint-following co.trol and interval uncertainty analysis is *** method proposed provides a novel way to predict the impact point of projectile for moving ***,bidirectional stability co.straints and stability co.straint-following error are co.structed using the Udwadia-Kalaba theory,and an adaptive robust co.straint-following co.troller is designed co.sidering ***,the exterior ballistic ordinary differential equation with uncertainties is integrated into the co.troller,and the pointing co.trol of stability system is extended to the impact-point co.trol of ***,based on the interval uncertainty analysis method co.bining Chebyshev polynomial expansion and affine arithmetic,a prediction method of projectile-target intersection is ***,the co.simulation experiment is performed by establishing the multi-body system dynamic model of tank and mathematical model of co.trol *** results demonstrate that the prediction method of projectile-target intersection based on uncertainty analysis can effectively decrease the uncertainties of system,improve the prediction accuracy,and increase the hit *** adaptive robust co.straint-following co.trol can effectively restrain the uncertainties caused by road excitation and model error.

关键词： Tank stability co.trol co.straint-following Adaptive robust co.trol Uncertainty analysis Prediction of projectile-target intersection

Reaction mechanism between Al_(2)O_(3)–MgO refractory materials and rare earth high-carbon heavy rail steel

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research(International) 2024年第5期31卷 1153-1163页

作者： Yi Wang Guang-jie Song Ping Shen Jian-zhong He Da-xian Zhang Jian-xun Fu Center for Advanced Solidification Technology(CAST) School of Materials Science and EngineeringState Key Laboratory of Advanced Special SteelShanghai UniversityShanghai200444China State Key Laboratory of Baiyunebo Rare Earth Resources Research and co.prehensive Utilization Baotou014030Inner MongoliaChina inner mongolia Baotou Steel Union co. Ltd.Baotou014030Inner MongoliaChina

Submerged entry nozzle(SEN)clogging is a major problem affecting the production quality of rare earth steel,and finding a suitable refractory outlet can significantly reduce production *** explore the relationship between refractory co.position and interface interaction,unprotected co.ted Al_(2)O_(3)–MgO refractories and SiO2-co.ted Al_(2)O_(3)–MgO refractories were added to rare earth high-carbon heavy rail steel under laboratory co.ditions,and the Al_(2)O_(3)–MgO refractory was found to be more *** results show that,from the epoxy resin side to the refractory side,the co.tour of the refractory interface reaction layer can be divided into two main layers:an iron-rich reaction layer and an iron-poor reaction *** based on the spherical model suggest that the adhesion force is proportional to the size of the refractory particles and inclusions,and the same result applies to the surface *** the inclusions at a smaller size has a specific effect on alleviating the erosion of *** with the erosion mechanism of Al_(2)O_(3)–MgO refractories,the interface reaction mechanism between Al_(2)O_(3)–MgO refractories and molten steel was proposed,which provides ideas for solving SEN clogging.

关键词： Rare earth high-carbon heavy rail steel Al_(2)O_(3)-MgO refractory Adhesion Surface tension Interface interaction

Validation of Molecular Detection Methods for Gluten Allergens in Infant Formula

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Agricultural Research 2024年第1期16卷 29-31,36页

作者： Shuhuan ZHAO Yunxia WANG Cuizhi LI inner mongolia Yili Industrial group co. Ltd.Inner MongoliaHohhot 010110China

[Objectives]To verify the specificity,sensitivity,precision and negative-positive deviation of the foodproof gluten co.ponent de-tection kit for the detection of gluten allergens in milk powder matrix,and to establish a real-time fluorescent PCR legal method for the detec-tion of gluten allergens in milk powder.[Methods]The specificity,sensitivity,precision and negative-positive deviation of the detection method of foodproof gluten co.ponent detection kit(PCR-probe method)were verified by artificially adding different co.centrations of wheat bran and extracting sample DNA by kit method,and applied to sample detection.[Results] The specific detection results of two kinds of milk powder with wheat bran and buckwheat added showed that the foodproof gluten co.ponent detection kit(PCR-probe method)had good speci-ficity for wheat *** results of artificially added wheat bran positive samples showed that the false positive rate and false negative rate of the kit in the milk powder matrix were O,and the sensitivity and precision were high.[co.clusions]The kit is simple to operate and has high accuracy,which is suitable for the detection of gluten allergen co.ponents in milk powder.

关键词： Real-time fluorescent PCR Gluten Allergen Infant formula

Prophylactic treatment of Lacticaseibacillus paracasei K56 ameliorates asthma by regulating short-chain fatty acid production and Treg differentiation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Food Science and Human Wellness 2024年

作者： Jiaqi Cui Yanfei Hong Wei-Hsien Liu Wen Zhao Xinmei Nan Xuekai Shang Yalan Li Haotian Feng Qiuyue Jiang Weilian Hung Guiying Peng inner mongolia Yili Industrial group co. Ltd. Department of Immunology and Microbiology School of Life Sciences Beijing University of Chinese Medicine

Many studies have shown that the development of allergic asthma is associated with intestinal microbiota dysbiosis. Based on the gut-lung axis theory， probiotic intervention may be a potential strategy for respiratory diseases. Lacticaseibacillus paracasei K56 was reported to regulate gut microbiota in mice. However， its effect on allergic asthma has not been reported. In this study， we investigated the effect of the K56 on ovalbumin-induced asthma and its possible mechanisms. Our results showed that K56 reduced asthma symptoms and inflammatory cell infiltration in the lung of asthmatic mice. And K56 regulated the differentiation of helper T cells in the lung and intestine. Results from 16S rRNA gene sequencing showed that K56 prophylaxis significantly elevated the richness of Akkermansia and Burkholderia. Meanwhile， K56 abrogated the decrease in the levels of short-chain fatty acids (SCFAs) in the feces. In addition， a rebound in the mRNA expression of the SCFA receptors was observed after K56 prophylaxis. Notably， the regulatory T cell (Treg) frequencies and the FFAR3 levels were positively co.related. These results suggest that K56 co.ld attenuate asthma， possibly by modulating the intestinal microbiota and regulating Treg differentiation through SCFA metabolized. Our study showed that K56 may be used as a probiotic to prevent pulmonary inflammation and dysbiosis of the intestinal microbiota in allergic asthma.

关键词：

Application of Next Generation Sequencing for Rapid Identification of Lactic Acid Bacteria

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Asian Agricultural Research 2024年第4期16卷 27-32页

作者： Xiaxia HOU Yunxia WANG Shuhuan ZHAO Hongbing JIA Cuizhi LI inner mongolia Yili Industrial group co. Ltd.Hohhot 010110China

The rapid identification of lactic acid bacteria,which are essential microorganisms in the food industry,is of great significance for industrial *** identification of lactic acid bacteria traditionally relies on the isolation and identification of pure *** this method is well-established and widely used,it is not without *** subjective judgment inherent in the isolation and purification process introduces potential for error,and the inco.plete nature of the isolation process can result in the loss of valuable *** advent of next generation sequencing has provided a novel approach to the rapid identification of lactic acid *** technology offers several advantages,including rapidity,accuracy,high throughput,and low *** generation sequencing represents a significant advancement in the field of DNA *** ability to rapidly and accurately identify lactic acid bacteria strains in samples with insufficient information or in the presence of multiple lactic acid bacteria sets it apart as a valuable *** application of this technology not only circumvents the potential errors inherent in the traditional method but also provides a robust foundation for the expeditious identification of lactic acid bacteria strains and the authentication of bacterial powder in industrial *** paper co.mences with an overview of traditional and molecular biology methods for the identification of lactic acid *** each method has its own advantages,they are not without limitations in practical ***,the paper provides an introduction of the principle,process,advantages,and disadvantages of next generation sequencing,and also details its application in strain identification and rapid identification of lactic acid *** objective of this study is to provide a co.prehensive and reliable basis for the rapid identification of industrial lactic acid bacteria strains and the authen

关键词： Lactic acid bacteria Rapid identification Next generation sequencing

Research Progress of Microplastics Pollution in Environment

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Agricultural Research 2024年第4期16卷 19-22页

作者： Peng WAN Zhen ZHAO Guoyan WEN Yunshuang FU Cuizhi LI Xiaoli WU inner mongolia Yili Industrial group co. Ltd.Hohhot 010010China

Microplastics pollution has beco.e one of the focuses of global environmental science *** include micro plastic particles and nano-plastic particles,which co.e from the deco.position of plastic products,the release of microfibers and the industrial process of plastic *** distribution of microplastics in water,soil and atmosphere is summarized,and the widespread existence of microplastics in different environmental media is *** paper also summarizes the potential impact of microplastics on eco.ystems and organisms,and pays attention to the transmission and accumulation of microplastics in the food chain,as well as its potential threat to human ***,the paper discusses the methods and technologies of microplastics treatment and monitoring at present,and puts forward the direction of further research on microplastics pollution in order to formulate more effective management and mitigation strategies.

关键词： Microplastics Environment Pollution

Research Progress of Detection Methods for Microplastics

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Agricultural Research 2024年第3期16卷 29-32页

作者： Peng WAN Zhen ZHAO Guoyan WEN Yunshuang FU Cuizhi LI Xiaoli WU inner mongolia Yili Industrial group co. Ltd.Hohhot 010010China

Microplastics are plastic particles or fibers with a diameter of less than 5 mm,and they widely exist in the environment and pose potential risks to the eco.ystem and human *** detection can provide basic data for formulating effective environmental protection *** this paper,the physical,chemical and biological detection methods of microplastics are reviewed,and the advantages and disadvantages of different methods are *** problems and challenges enco.ntered in microplastics detection are analyzed,and the future research is discussed.

关键词： Microplastics Detection method Research progress

Three-dimensional parametric co.tact analysis of planetary roller screw mechanism and its application in grouping for selective assembly

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Mechanical Engineering 2024年第1期19卷 53-72页

作者： Huilin HE Peitang WEI Huaiju LIU Xuesong DU Rui HU Genshen LIU Yajun WU State Key Laboratory of Mechanical Transmission for Advanced Equipment Chongqing UniversityChongqing 400044China Taiyuan heavy Machinery group co. Ltd.Taiyuan 030024China

The planetary roller screw mechanism(PRSM)is a novel precision transmission mechanism that realizes the co.version between linear and rotary *** co.tact characteristics of helical surfaces directly determine PRSM’s performance in load-carrying capacity and transmission ***,studying the co.tact characteristics of PRSM forms the fundamental basis for enhancing its transmission *** this study,a three-dimensional parametric analysis method of co.tact characteristics is proposed based on the PRSM meshing principle and PyVista(a high-level API to the Visualization Toolkit).The proposed method co.siders the influence of machining errors among various thread *** effects of key machining errors on co.tact positions and axial clearance,as well as their sensitivities,are *** excellent solution accuracy,this method exhibits higher calculation efficiency and stronger robustness than the analytical and numerical meshing *** influence of nominal diameter and pitch errors of the screw,roller,and nut on the axial clearance follows a linear relationship,whereas flank angle errors have negligible effects on the axial *** co.responding influence co.fficients for these three machining errors on the axial clearance are 0.623,0.341,and *** variations in co.tact positions caused by individual errors are *** angle errors and roller diameter errors result in linear displacements of the co.tact points,whereas pitch errors cause the co.tact points to move along the arc of the roller *** on the proposed threedimensional parametric co.tact characteristics analysis method,the Fuzzy C-Means clustering algorithm co.sidering error sensitivity is utilized to establish a co.ponent grouping technique in the selective assembly of critical PRSM co.ponents,ensuring the rational and co.sistent clearances based on the given co.ponent’s machining *** study provides effective guidance for analyzing co.ta

关键词： planetary roller screw mechanism(PRSM) co.tact position axial clearance machining error grouping for selective assembly

Research on Three-Dimensional Simulation of the Internal Arc Gear Skiving

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Mechanical Engineering Science 2024年第1期6卷 35-40页

作者： Xiaoqiang WU Rui XUE Erkuo GUO Dongzhou JIA Taiyan GONG Zengrong LI Haijun YANG Xiaoxue LI Xin JIANG Shuai DING Yong LIU Shitian LI School of Mechanical and Traffic Engineering Ordos Institute of TechnologyOrdosInner Mongolia017000China Tianjin TANHAS Technology co. LTDTianjin301600China School of Mechanical Engineering Jiangsu UniversityZhenjiangJiangsu212002China co.lege of Mechanical Engineering and Automation Liaoning University of TechnologyJinzhouLiaoning121001China inner mongolia Ruite Precision Mould co. LTD.The First Machinery GroupBaotouInner Mongolia014030China inner mongolia University Of Technology College Of Energy And Power EngineeringHohhotInner Mongolia010051China

Aiming at the problems that the simulation accuracy which is reduced due to the simplification of the model,a three-dimensional simulation method based on solid modeling is being *** analyzing the motion relationship and positional relationship between the caries knife and the workpiece,the co.rdinate system of the caries machining was *** the MATLAB software,the cutting edge model and the blade sweeping surface model of the boring cutter are sequentially *** operation is performed on the blade swept surface formed by the tooth cutter teeth with time t and the workpiece tooth geometry as well as the undeformed three-dimensional chip geometry model and the instantaneous co.ging geometry model are obtained at different *** the co.pare between gear end face simulation tooth profile and the theoretical inner arc tooth profile,we verified the accuracy and rationality of the proposed method.

关键词： gear skiving undeformed three-dimensional chips solid modeling