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基于RWI-HDR的寒冷地区高速服务区室内热舒适研究

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铁道建筑技术 2024年第2期 46-49,58页

作者：陈为刚中铁建设集团有限公司北京100040 中铁建设集团华北工程有限公司天津300308

通过对寒冷地区既有高速服务区室内舒适状况实测统计分析发现,TSV-TCV平均投票统计分析结果不能满足室内热舒适Ⅱ级要求,存在室内热扰多、冬季冷风渗透导致的温度过低现象。基于此,本文采用RWI与HDR指标对其室内热舒适状况进行评价,计... 详细信息

通过对寒冷地区既有高速服务区室内舒适状况实测统计分析发现,TSV-TCV平均投票统计分析结果不能满足室内热舒适Ⅱ级要求,存在室内热扰多、冬季冷风渗透导致的温度过低现象。基于此,本文采用RWI与HDR指标对其室内热舒适状况进行评价,计算出不同工况下各区域所对应的RWI值与HDR值,并与实测值进行对比;建立适用于高速服务区建筑的RWI*与HDR*修正计算公式,并分析服务区人员的RWI*、HDR*值与室内温度对应关系,给出高速服务区室内环境热舒适范围;采用“走行路线实验法”对既有服务区热湿环境及舒适情况进行实测分析,以便对能源孤岛型建筑——高速服务区室内热舒适环境营造及节能措施提供参考。

关键词：高速服务区动态热舒适过渡空间 RWI-HDR指标指标修正

Aircraft parameter estimation using a stacked long short-term memory network and Levenberg-Marquardt method

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Chinese Journal of Aeronautics 2024年第2期37卷 123-136页

作者： Zhe HUI Yinan KONG weigang YAO Gang chen School of Aerospace Science and Technology Xidian UniversityXi’an 710071China Computation Aerodynamics Institution China Aerodynamics Research and Development CenterMianyang 621000China Faculty of Computing Engineering and MediaDe Montfort UniversityLeicester LE19BHUnited Kingdom School of Aerospace Engineering Xi’an Jiaotong UniversityXi’an 710049China

To effectively estimate the unknown aerodynamic parameters from the aircraft’s flight data,this paper proposes a novel aerodynamic parameter estimation method incorporating a stacked Long Short-Term Memory(LSTM)network model and the Levenberg-Marquardt(LM)*** stacked LSTM network model was designed to realize the aircraft dynamics modeling by utilizing a frame of nonlinear functional mapping based entirely on the measured input-output data of the aircraft system without requiring explicit postulation of the *** LM method combines the already-trained LSTM network model to optimize the unknown aerodynamic *** proposed method is applied by using the real flight data,generated by ATTAS aircraft and a bio-inspired morphing Unmanned Aerial Vehicle(UAV).The investigation reveals that for the two different flight data,the designed stacked LSTM network structure can maintain the efficacy of the network prediction capability only by appropriately adjusting the dropout rates of its hidden layers without changing other network parameters(i.e.,the initial weights,initial biases,number of hidden cells,time-steps,learning rate,and number of training iterations).Besides,the proposed method’s effectiveness and potential are demonstrated by comparing the estimated results of the ATTAS aircraft or the bio-inspired morphing UAV with the corresponding reference values or wind-tunnel results.

关键词： Parameter estimation LSTM network model LM method Aerodynamic parameters Flight data Aircraft dynamics modeling Network prediction capability Network parameters

门诊患者结直肠癌肠镜筛查依从性的相关影响因素研究

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中华消化内镜杂志 2024年第2期41卷 131-136页

作者：谭雪娇彭昕秦健李加学冶丽娜濮蓉晖赖力马家静陈卫刚石河子大学第一附属医院消化内科石河子832000 新疆生产建设兵团第四师医院消化内科伊犁835000 新疆生产建设兵团第三师医院(喀什院区)消化肿瘤科喀什844000 新疆生产建设兵团第十三师红星医院消化内科哈密839000 新疆生产建设兵团第十师北屯医院消化科北屯836099 新疆生产建设兵团第七师医院消化科奎屯833200 新疆生产建设兵团第五师医院消化内科博乐833400

目的探讨影响门诊患者结直肠癌肠镜筛查依从性的独立危险因素。方法纳入2022年1月至2022年6月在新疆7个地州内7家三级医院消化内科门诊就诊的40~74岁患者,结合患者就诊情况对符合肠镜检查条件的患者提出筛查建议,并通过问卷收集信息。... 详细信息

目的探讨影响门诊患者结直肠癌肠镜筛查依从性的独立危险因素。方法纳入2022年1月至2022年6月在新疆7个地州内7家三级医院消化内科门诊就诊的40~74岁患者,结合患者就诊情况对符合肠镜检查条件的患者提出筛查建议,并通过问卷收集信息。先采用χ^(2)检验比较依从与未依从肠镜筛查建议患者的特征差异,再采用多因素logistic回归模型(逐步回归:向前,有条件)分析与结肠镜筛查依从性相关的独立危险因素。结果从7个中心共获取463份有效问卷,依从肠镜检查建议者427例(92.2%)、未依从肠镜检查建议者36例(7.8%)。χ^(2)检验发现,两类人群在性别构成、年龄分布、文化程度构成、肠息肉主观认知构成、有无结直肠息肉个人史、有无结直肠癌家族史、有无结直肠息肉家族史、有无腹痛或腹胀症状以及有无大便习惯或性状改变方面差异均有统计学意义(P<0.05)。多因素logistic回归分析发现,40~49岁人群(P=0.005,OR=0.141,95%CI:0.036~0.549)、50~59岁人群(P=0.039,OR=0.257,95%CI:0.071~0.932)肠镜检查依从性均明显差于60~74岁人群;中学文化程度人群(P=0.011,OR=3.121,95%CI:1.304~7.473)、本专科及以上文化程度人群(P=0.016,OR=3.544,95%CI:1.270~9.890)肠镜检查依从性均明显好于小学及以下文化程度人群;有结直肠息肉个人史人群肠镜检查依从性明显好于无结直肠息肉个人史人群(P=0.015,OR=12.288,95%CI:1.629~92.719);有结直肠癌家族史人群肠镜检查依从性明显好于无结直肠癌家族史人群(P=0.038,OR=8.506,95%CI:1.124~64.351);有大便习惯或性状改变人群肠镜检查依从性明显好于无大便习惯或性状改变人群(P=0.039,OR=4.794,95%CI:1.085~21.192)。结论新疆7个地州内7家三级医院门诊患者肠镜筛查依从性与患者年龄、文化程度、结直肠息肉个人史、直肠癌家族史以及大便习惯或性状改变密切相关。年龄在40~59岁、文化程度较低、既往无息肉病史或结直肠癌家族史、无大便习惯或性状改变是影响门诊患者结直肠癌肠镜筛查依从性的独立危险因素。

关键词：结肠镜检查结直肠癌门诊患者依从性影响因素

波幅负荷和癫痫样放电评分系统对促肾上腺皮质激素治疗婴儿癫痫性痉挛综合征疗效的评估价值

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癫痫杂志 2024年第4期10卷 308-312页

作者：汤志鸿陈伟岗尹映仪彭倩邓皓辉东莞市妇幼保健院儿童神经科东莞523000

目的探讨波幅负荷和癫痫样放电评分(Burden of amplitudes and epileptiform discharges score,BASED)系统在评估促肾上腺皮质激素(Adrenocorticotropic hormone,ACTH)联合硫酸镁治疗婴儿癫痫性痉挛综合征(Infantile epileptic spasms syndrome,IESS)患者疗效的评估价值。方法回顾性收集2015年—2023年东莞市妇幼保健院小儿神经专科收治的符合IESS并予ACTH联合硫酸镁治疗的124例患者的临床及脑电图资料。根据ACTH治疗后14天时是否有癫痫发作分为无发作组(n=74例)和发作组(n=50例),采用BASED系统评价ACTH治疗前后两组脑电图变化与临床疗效之间的关系。脑电图分析内容包括:①异常高波幅背景波;②≥3个棘波灶的1s格;③成组的多灶性棘波;④阵发性电压衰减。结果ACTH联合硫酸镁治疗IESS控制率为59.7%(74/124),不同病因患儿控制率比较差异无统计学差异(P=0.09)。BASED评分提示IESS患儿治疗后脑电图总缓解率为57.2%。其中发作控制组脑电图缓解率为81.0%(60/74),未控制组脑电图缓解率为22.0%(11/50),发作控制组治疗后EEG缓解明显高于未控制组(P<0.001),脑电图评分与临床疗效相关(Spearman相关系数rp=0.601,P<0.001),相关关系密切。结论BASED评分与临床疗效相关,BASED评分可以为临床ACTH联合硫酸镁治疗IESS疗效评估提供量化依据。

关键词：婴儿癫痫性痉挛综合征波幅负荷和癫痫样放电评分系统促肾上腺皮质激素

Decoding on Adaptively Pruned Trellis for Correcting Synchronization Errors

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China Communications 2017年第7期14卷 163-171页

作者： Yuan Liu weigang chen School of Microelectronics Tianjin Univeristy

Forward-backward algorithm, used by watermark decoder for correcting non-binary synchronization errors, requires to traverse a very large scale trellis in order to achieve the proper posterior probability, leading to high computational complexity. In order to reduce the number of the states involved in the computation, an adaptive pruning method for the trellis is proposed. In this scheme, we prune the states which have the low forward-backward quantities below a carefully-chosen threshold. Thus, a wandering trellis with much less states is achieved, which contains most of the states with quite high probability. Simulation results reveal that, with the proper scaling factor, significant complexity reduction in the forward-backward algorithm is achieved at the expense of slight performance degradation.

关键词：网格自适应同步误差解码器自适应校正计算复杂度向后算法后验概率状态数

An Iterative Decoding Scheme for Davey-MacKay Construction

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China Communications 2018年第6期15卷 187-195页

作者： Yuan Liu weigang chen School of Microelectronics Tianjin UniveristyTianjin 300072China

In the Davey-MacKay(DM) construction,the inner decoder treats unknown transmitted bits as random independent substitution errors. It limits the synchronization capability of the inner decoder, and thus weakens the error-correcting capability of the DM *** order to improve the performance of the DM construction, an iterative decoding scheme is proposed, which iteratively utilizes the more accurate estimates of transmitted codewords. In the proposed scheme, the estimated average bit error rates and the estimated low-density parity-check(LDPC) codewords from the outer decoder are fed back into the inner decoder to update the synchronization process. Simulation results show that the proposed iterative decoding scheme significantly outperforms the traditional DM construction.

关键词：译码同步过程解码器构造 DM 估计错误率低密度

Stable major QTL on chromosomes A07 and A08 increase shelling percentage in peanut(Arachis hypogaea L.)

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The Crop Journal 2022年第3期10卷 820-829页

作者： Weitao Li Nian Liu Li Huang Yuning chen Jianbin Guo Bolun Yu Huaiyong Luo Xiaojing Zhou Dongxin Huai weigang chen Liying Yan Xin Wang Yong Lei Boshou Liao Huifang Jiang Key Laboratory of Biology and Genetic Improvement of Oil Crops Ministry of Agriculture and Rural AffairsOil Crops Research Institute of the Chinese Academy of Agricultural SciencesWuhan 430062HubeiChina

Peanut is a major oilseed and food *** percentage(SP),closely associated with seed yield,is a trait whose improvement is a major goal of peanut *** this study,a mapping population(Xuhua 13×Zhonghua 6)was used to map quantitative trait loci(QTL)controlling SP in four *** stable major QTL for SP were mapped on both SSR-and SNP-based genetic maps.q SPA07.1 on chromosome A07 explained up to 31.7%of phenotypic variation,and q SPA08.2 on chromosome A08 explained up to 10.8%.Favorable alleles of q SPA07.1 and q SPA08.2 were derived from the female and male parents,*** recombinant inbred lines(RILs)carrying both favorable alleles showed superiority in SP over the two parents in all environmental trials.A combination of the two favorable alleles using the linked markers was verified to increase SP by~5%in the RIL population and by~3%SP in diverse peanut cultivars.q SPA07.1 and q SPA08.2 were delimited to respectively a 0.73-Mb interval harboring 96 genes and a 3.93-Mb interval harboring 238 *** five and eight genes with high expression in pods,including enzymes and transcription factors,were assigned as candidate genes for q SPA07.1 and q *** consistent major QTL provide an opportunity for fine mapping of genes controlling SP,and the linked markers may be useful for genetic improvement of SP in peanut.

关键词： Peanut Shelling percentage QTL mapping Genomic region Candidate genes InDel marker

Optimal structural design for a certain near-space composite propeller of airship using adaptive region division blending model

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Chinese Journal of Aeronautics 2024年第5期37卷 301-316页

作者： weigang AN Tianyu LIN Shigen WANG School of Aeronautics Northwestern Polytechnical UniversityXi’an 710072China

Near-space airship is a frontier and hotspot in current military research and development,and the near-space composite propeller is the key technology for its *** order to obtain higher aerodynamic efficiency at an altitude of 22 km,a certain near-space composite propeller is designed as a long and slender aerodynamic shape with a 10 m diameter,which brings many challenges to the composite structure *** initial design is obtained by the composite structure variable stiffness design method using based on fixed region division blending ***,it weighs 23.142 kg,exceeding the required 20 *** order to meet the structural design requirements of the propeller,a variable stiffness design method using the adaptive region division blending model is proposed in this *** with the methods using the fixed region division blending model,this method optimizes region division,stacking thickness and stacking sequence in a single level,considering the coupling effect among *** a more refined region division,this method can provide a more optimal design for composite tapered ***,to improve the efficiency of optimization subjected to manufacturing constraints,a hierarchical penalty function is proposed to quickly filter out the solutions that do not meet manufacturing *** above methods combined with a Genetic Algorithm(GA)using specific encoding are adopted to optimize the near-space composite *** optimal design of the structure weighs 18.831 kg,with all manufacturing constraints and all structural response constraints being *** with the initial design,the optimal design has a more refined region division,and achieves a weight reduction of 18.6%.This demonstrates that a refined region division can significantly improve the mechanical performance of the composite tapered structure.

关键词： Structural optimization Composite tapered structure Genetic algorithm Adaptive region division Manufacturing constraint Near-space composite propeller

Exogenous artificial DNA forms chromatin structure with active transcription in yeast

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Science China(Life Sciences) 2022年第5期65卷 851-860页

作者： Jianting Zhou Chao Zhang Ran Wei Mingzhe Han Songduo Wang Kaiguang Yang Lihua Zhang weigang chen Mingzhang Wen cheng Li Wei Tao Ying-Jin Yuan Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering(Ministry of Education) Tianjin UniversityTianjin 300072China SynBio Research Platform Collaborative Innovation Center of Chemical Science and Engineering(Tianjin)School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China The MOE Key Laboratory of Cell Proliferation and Differentiation School of Life SciencesPeking UniversityBeijing 100871China CAS Key Laboratory of Separation Science for Analytical Chemistry National Chromatographic R.&A.CenterDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China University of Chinese Academy of Sciences Beijing 100049China School of Microelectronics Tianjin UniversityTianjin 300072China

Yeast artificial chromosomes(YACs) are important tools for sequencing,gene cloning,and transferring large quantities of genetic ***,the structure and activity of YAC chromatin,as well as the unintended impacts of introducing foreign DNA sequences on DNA-associated biochemical events,have not been widely ***,we showed that abundant genetic elements like TATA box and transcription factor-binding motifs occurred unintentionally in a previously reported datacarrying chromosome(d Chr).In addition,we used state-of-the-art sequencing technologies to comprehensively profile the genetic,epigenetic,transcriptional,and proteomic characteristics of the exogenous d *** found that the data-carrying DNA formed active chromatin with high chromatin accessibility and H3K4 tri-methylation *** d Chr also displayed highly pervasive transcriptional ability and transcribed hundreds of noncoding *** results demonstrated that exogenous artificial chromosomes formed chromatin structures and did not remain as naked or loose plasmids.A better understanding of the YAC chromatin nature will improve our ability to design better data-storage chromosomes.

关键词： yeast artificial chromosome DNA storage epigenetics chromatin accessibility histone H3K4 tri-methylation