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超重肥胖6～7岁儿童心脏形态功能指标分析

中国学校卫生 2018年第3期39卷 425-428页

作者：周丽汪军刘敏北京体育大学运动人体科学学院北京100084

目的了解6～7岁超重肥胖儿童心脏结构和功能及其影响因素,为促进儿童心肺功能发育提供依据。方法选取北京市2014年5所参与特色体育教育小学的部分一年级学生690名,用体质量指数(BMI)诊断标准将学生分为正常、超重、肥胖3组,进行超声心... 详细信息

目的了解6～7岁超重肥胖儿童心脏结构和功能及其影响因素,为促进儿童心肺功能发育提供依据。方法选取北京市2014年5所参与特色体育教育小学的部分一年级学生690名,用体质量指数(BMI)诊断标准将学生分为正常、超重、肥胖3组,进行超声心动测试,观察其心脏结构和功能及影响因素。结果北京市6～7岁儿童超重和肥胖检出率分别为18.3%和19.7%,男童超重和肥胖检出率(10.0%和12.0%)高于女童(8.3%和7.7%),差异均有统计学意义(χ~2值分别为4.748,12.333,P值均<0.05)。肥胖儿童的室间隔舒张末期厚度(IVSd)、室间隔收缩末期厚度(IVSs)、左室舒张末期内径(LVIDd)、左室收缩末期内径(LVIDs)、左室后壁舒张末期厚度(LVPWd)、左室后壁收缩末期厚度(LVPWs)、左室舒张末期容积(EDV)、AOD、左心室质量(LVM)、左心室质量指数(LVMI)、左室收缩末期容积(ESV)、衍生指标心输出量(CO)、每搏量(SV)均高于正常儿童(P值均<0.05);超重儿童的IVSd,IVSs,AOD,LVM均高于正常儿童,肥胖儿童的LVIDd,EDV,LVM,CO,SV均高于超重儿童(P值均<0.05)。6～7岁儿童LVM的主要影响因素有腰臀比、臀围、性别和体脂率,其中起主要作用的是腰臀比;LVMI的主要影响因素有腰臀比、臀围、BMI和体脂率,其中起主要作用的是腰臀比。6～7岁超重、肥胖儿童罹患左心室肥大的风险未见增高。结论超重、肥胖儿童左心室壁增厚、左心室内径增大、左心室质量增加,并且已经出现高血流动力学状态。应注意肥胖儿童腰臀比、体脂率的增加,尤其是腰臀比。

关键词：超重肥胖症心脏儿童

A New Class of Strong Orthogonal Arrays of Strength Three

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Journal of Systems Science & Complexity 2024年第3期37卷 1233-1250页

作者： WANG Chunyan liu min.Qian YANG Jinyu Center for Applied Statistics and School of Statistics Renmin University of ChinaBeijing 100872China School of Statistics and Data Science LPMC&KLMDASRNankai UniversityTianjin 300071China

Strong orthogonal arrays(SOAs) were recently introduced and studied as a class of spacefilling designs for computer experiments. To surely realize better space-filling properties, SOAs of strength three or higher are desirable. In addition, orthogonality is also an important property for designs of computer experiments, because it guarantees that the estimates of the main effects are uncorrelated. This paper first provides a systematic study on the construction of(nearly) orthogonal strength-three SOAs with better space-filling properties. The newly proposed strength-three SOAs enjoy almost the same space-filling properties of strength-four SOAs, and can accommodate much more columns than the latter. Moreover, they are(nearly) orthogonal and flexible in run sizes. The construction methods are straightforward to implement, and their theoretical supports are well established. In addition to the theoretical results, many designs are tabulated for practical needs.

关键词： Computer experiment orthogonality space-filling property strong orthogonal array

An Approximation Algorithm Based on Seeding Algorithm for Fuzzy k-Means Problem with Penalties

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Journal of the Operations Research Society of China 2024年第2期12卷 387-409页

作者： Wen-Zhao liu min.Li School of Mathematics and Statistics Shandong Normal UniversityJinan 250014ShandongChina

As a classic NP-hard problem in machine learning and computational geometry,the k-means problem aims to partition the given dataset into k clusters according to the min.mal squared Euclidean *** from k-means problem and most of its variants,fuzzy k-means problem belongs to the soft clustering problem,where each given data point has relationship to every center *** to fuzzy k-means problem,fuzzy k-means problem with penalties allows that some data points need not be clustered instead of being paid *** this paper,we propose an O(αk In k)-approximation algorithm based on seeding algorithm for fuzzy k-means problem with penalties,whereαinvolves the ratio of the maximal penalty value to the min.mal ***,we implement numerical experiments to show the effectiveness of our algorithm.

关键词： Approximation algorithm Seeding algorithm Fuzzy k-means problem with penalties

优质护理服务在老年脑梗死患者中的应用效果观察

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基层医学论坛 2018年第15期22卷 2032-2034,2161页

作者：刘敏成都市德康医院四川成都610091

目的分析优质护理服务在老年脑梗死患者中的应用效果。方法以2016年3月—2017年2月期间我院收治的96例老年脑梗死患者为研究对象,随机分为对照组和观察组各48例。对照组采用常规护理,观察组在对照组基础上实施优质护理服务,对比2组患者... 详细信息

目的分析优质护理服务在老年脑梗死患者中的应用效果。方法以2016年3月—2017年2月期间我院收治的96例老年脑梗死患者为研究对象,随机分为对照组和观察组各48例。对照组采用常规护理,观察组在对照组基础上实施优质护理服务,对比2组患者的护理效果及满意度。结果对照组的护理优良率为81.25%,患者满意度为85.42%;观察组护理优良率为95.83%,患者满意度为97.91%,组间比较差异均有统计学意义(P<0.05)。结论针对老年脑梗死患者采用优质护理服务可提高护理效果和满意度,值得推广。

关键词：脑梗死老年患者优质护理服务应用效果

Effect of operating conditions on the performance of riser reactor for oxidative coupling of methane Author links open overlay panel

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Particuology 2024年第8期91卷 235-248页

作者： min.Cai Shuangzhu Kong Mengxi liu Chunxi Lu State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing102249China

Oxidative coupling of methane(OCM)is characterized by high temperature and strong heat released.A riser reactor is designed for the OCM process to improve gas-solid contacting and heat *** work illustrates the effect of hydrodynamic conditions and feed gas composition on the performance of an OCM riser *** findings suggest that oxidative reactions predomin.ntly occur within the acceleration zone and developed flow ***,at the low superficial gas velocity accompanied by a high solid circulating rate,the C_(2)yield initially increases in the acceleration zone,followed by a decrease in the developed flow zone and deceleration *** optimal operating conditions are a specific region corresponding to the solids holdup ranges from 0.015 to ***,the C_(2)yield can be elevated using an appropriate feed mixture.

关键词： Oxidative coupling of methane Riser Hydrodynamics Solids holdup

From molecule to cell:the expanding frontiers of plant immunity

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Journal of Genetics and Genomics 2024年第7期51卷 680-690页

作者： Lei Li Jing liu Jian-min.Zhou Key Laboratory of Seed Innovation Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing 100101China Hainan Yazhou Bay Seed Laboratory SanyaHainan 572025China

In recent years,the field of plant immunity has witnessed remarkable *** the co-evolution between plants and pathogens,plants have developed a wealth of intricate defense mechanisms to safeguard their *** identified immune receptors have added unexpected complexity to the surface and intracellular sensor networks,enriching our understanding of the ongoing plant–pathogen *** the molecular mechanisms of resistosome shapes our understanding of these mysterious molecules in plant ***,technological innovations are expanding the horizon of the plant–pathogen battlefield into spatial and temporal *** the development provides new opportunities for untangling the complex realm of plant immunity,challenges remain in uncovering plant immunity across spatiotemporal dimensions from both molecular and cellular levels.

关键词： Plant immunity Calcium Spatiotemporal Biomolecular condensate Immune receptor Resistosome

Botrytis cinerea-induced F-box protein 1 enhances disease resistance by inhibiting JAO/JOX-mediated jasmonic acid catabolism in Arabidopsis

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Molecular Plant 2024年第2期17卷 297-311页

作者： min.Zhang Weiwei Li Tingyu Zhang Yueyan liu Lijing liu The Key Laboratory of Plant Development and Environmental Adaptation Biology Ministry of EducationSchool of Life SciencesShandong UniversityQingdao 266237China

Jasmonic acid(JA)is a crucial phytohormone that regulates plant *** endogenous JA level is determin.d by the rates of its biosynthesis and catabolism in *** activation of JA biosynthesis has been well documented;however,how plants repress JA catabolism upon pathogen infection remains *** this study,we identified and characterized Botrytis cinerea-induced F-box protein 1(BFP1)in *** expression of BFP1 was induced by *** in a JA signaling-dependent manner,and BFP1 protein was critical for plant defense against *** and plant response to *** addition,BFP1 overexpression increased plant defenses against broad-spectrum pathogens without fitness *** experiments demonstrated that BFP1 interacts with and mediates the ubiquitination and degrada-tion of jasmonic acid oxidases(JAOs,also known as jasmonate-induced oxygenases,JoXs),the enzymes that hydroxylate JA to *** with this,BFP1 affects the accumulation of JA and 12OH-JA during *** ***,mutation of JAo2 complemented the phenotypes of the bfp1 ***,our results unveil a new mechanism used by plants to activate immune responses upon path-ogeninfection:suppressing JA catabolism.

关键词： plant immunity BFP1 JAO/JOXs JA catabolism ubiquitination-mediated degradation

Construction of Optimal Mixed-Level Uniform Designs

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Journal of Systems Science & Complexity 2024年第2期37卷 841-862页

作者： CHATTERJEE Kashinath liu min.Qian QIN Hong YANG liuqing Department of Population Health Sciences Division of Biostatistics and Data ScienceAugusta UniversityGA 30912USA NITFID LPMC&KLMDASRSchool of Statistics and Data ScienceNankai UniversityTianjin 300071China School of Statistics and Mathematics Zhongnan University of Economics and LawWuhan 430073China

The theory of uniform design has received increasing interest because of its wide application in the field of computer *** generalized discrete discrepancy is proposed to evaluate the uniformity of the mixed-level factorial *** this paper,the authors give a lower bound of the generalized discrete discrepancy and provide some construction methods of optimal mixed-level uniform designs which can achieve this lower *** methods are all determin.stic construction methods which can avoid the complexity of stochastic *** saturated mixed-level uniform designs and supersaturated mixed-level uniform designs can be obtained with these ***,the resulting designs are also χ^(2)-optimal and min.mum moment aberration designs.

关键词： Generalized discrete discrepancy Hadamard matrix mixed-level design orthogonal array supersaturated design

Modeling Method of Multi-Energy Systems Based on LSTM Algorithm

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CSEE Journal of Power and Energy Systems 2024年第4期10卷 1701-1709页

作者： Di Qiu Fei Chen Dong liu min.Cao Siyang liu Shanghai Jiao Tong University Shanghai 200240China Yunnan Power Grid Co. Ltd

The development of the Energy Internet has improved the efficiency of energy utilization and promoted sustainable development of power and energy *** multi-energy system modeling considering the dynamic process of transmission line is one of the key research points of Energy Internet operation *** the energy circuit theory,the lumped parameter model of natural gas pipelines is built and the dynamic characteristic parameters under the control instruction are *** with dynamic characteristic parameters,the long short-term memory(LSTM)neural network is designed to fit the natural gas pipeline dynamic process into discrete linear time-varying(LTV)*** with the equations,an energy hub method is used to build a control model of industrial parks with multi-energy distribution *** the rolling optimal control strategy given in this paper,the model is solved by the Matlab-Yalmip solver and rolling control instructions of each energy conversion unit are ***,the case study demonstrates that the LSTM neural network-based modeling method presented in this paper can accurately fit the dynamic process of a natural gas pipeline *** rolling control model of the multi-energy system can improve the efficiency of energy utilization,exhibit the transmission line status constraints during the optimization control process and improve reliability of the multi-energy system operation.

关键词： Energy hub LSTM multi-energy supply system pipeline system modeling