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考虑时间相关性的风速和波浪高度短期预测

船舶力学 2024年第6期28卷 832-842页

作者：姚骥汪雪良武文华顾学康张欣玉中国船舶科学研究中心江苏无锡214082 深海技术科学太湖实验室江苏无锡214082 大连理工大学运载工程与力学学部辽宁大连116024

风与波浪高度是海洋工程设计的重要参数之一,其准确预测具有重要的工程意义。针对波浪高度复杂多变、难以预测的挑战,本文考虑时间相关性,利用长短时记忆(Long-Short-Term Memory,LSTM)神经网络方法建立风和波浪高度的短期预测模型。首... 详细信息

风与波浪高度是海洋工程设计的重要参数之一,其准确预测具有重要的工程意义。针对波浪高度复杂多变、难以预测的挑战,本文考虑时间相关性,利用长短时记忆(Long-Short-Term Memory,LSTM)神经网络方法建立风和波浪高度的短期预测模型。首先,对波浪高度和风速等海洋环境原始时间序列进行分析,并选取不同时间间隔对浪高和风速极值进行取值;其次,对风速与波浪高度开展相关性分析,并基于LSTM方法,构建风和波浪高度单步预测模型。在时间间隔为0.5 h时,波浪的预测误差为0.12 m;进而构建风和波浪联合预测模型,预测风速下的波高预测误差仅为0.12m,与实测风速下的波浪预测误差基本一致。

关键词：相关性分析长短时记忆神经网络风速预测波浪预测联合预测模型

Coherence analysis of magnetoencephalography

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Coherence analysis of magnetoencephalography

中国神经科学学会第四次会员代表大会暨第八届全国学术会议

作者： Yang zhang~1 wen-Sheng HOU~(1 *) Wei-Na LI~2 Xiao-Ying wu~1 Guo-Cai wu~2 Hua FENG~2 Jun ZHENG~3 1 Department of Biomedical Engineering Chongqing University Chongqing 400044 china 2 Department of Neurosurgery Southwest Hospital Third Military Medical University Chongqing 400038 3 Department of Computer science New Mexico Institute of Mining and technology Socorro NM 87801 USA

＜正＞Objective The present study is to obtain correlation between spatially separated brain regions,as well as the changes in time and frequency domain through analysis of the magnetoencephalography *** By means of the theory of coherence analysis,coherence coefficient of two signals corresponding to different cortical areas is computed, which reflects synchronization of the above two signals,as well as the correlation between spatially separated brain *** frequency analysis is also used to discuss the cortical correlation changes co-vary closely with time over the course of motor task in the three frequency band-α,βand lowγ.Results（1） By computing the coherence coefficient relative to the selected reference channel,it is suggested that channels with the most significant coherence are approximately in the same area,*** contralateral primary motor cortex and premotor ***,with the increase of frequency band both the coherence coefficient and the coupled area decline.（2） Changes of coherence co-varing with time inα,βand lowγband present the following characteristic:①The coherence shows such a trend that it increases firstly and then decreases over the course of motor task.②The most significant coherence,forαband,is observed from 0 to 0.3 second,while forβand lowγit appears at -0.2 *** The changes of coherence inα,βand lowγbands suggest that there are different neuronal modulations in the contralateral primary motor *** this modulation covaries with time,which consequently reflects the changes of correlation between different brain regions in time and frequency domain.

关键词： magnetoencephalography coherence time frequency analysis

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三维放射治疗计划系统的研究

四川大学学报（自然科学版） 2002年第6期39卷 1074-1079页

作者：杨代伦吴章文孙官清柏森杨和理陈念永罗正明四川大学原子核科学技术研究所辐射物理及技术教育部重点实验室成都610064 四川省肿瘤医院成都610042

利用医用加速器治疗肿瘤,关键是先要通过计算机化的放射治疗计划系统设计治疗方案,再根据该方案对病人施行照射.作者介绍了研制成功的三维放射治疗计划系统,阐述了该系统的设计思路、系统的结构和系统的功能模块,以及系统实现的技术.

关键词：三维放射治疗计划系统系统结构专用软件系统系统设计功能模块临床治疗肿瘤治疗

Genome assembly of autotetraploid Actinidia arguta highlights adaptive evolution and enables dissection of important economic traits

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Plant Communications 2024年第6期5卷 173-192页

作者： Xue-Mei Lu Xiao-Fen Yu Guo-Qiang Li Ming-Hao Qu Huan Wang Chuang Liu Yu-Ping Man Xiao-Han Jiang Mu-Zi Li Jian Wang Qi-Qi Chen Rui Lei Cheng-Cheng Zhao Yun-Qiu Zhou Zheng-Wang Jiang Zuo-Zhou Li Shang Zheng Chang Dong Bai-Lin Wang Yan-Xiang Sun Hui-Qin zhang Jie-Wei Li Quan-Hui Mo Ying zhang Xin Lou Hai-Xu Peng Ya-Ting Yi He-Xin Wang Xiu-Jun zhang Yi-Bo Wang Dan Wang Li Li Qiong zhang wen-Xia Wang Yongbo Liu Lei Gao Jin-Hu wu Yan-Chang Wang CAS Key laboratory of Plant Germplasm Enhancement and Specialty Agriculture Wuhan Botanical GardenChinese Academy of SciencesWuhanHubeiChina Key laboratory of Western china’s Environmental Systems(Ministry of Education) College of Earth and Environmental SciencesLanzhou UniversityLanzhouGansuChina College of Life sciences University of Chinese Academy of SciencesBeijingChina wuhan Frasergen Bioinformatics Co. LtdWuhanHubeiChina Institute of Soil and Fertilizer Anhui Academy of Agricultural SciencesHefeiChina College of Agricultural sciences Xichang UniversityXichangSichuanChina Department of Horticulture Heilongjiang Academy of Agricultural SciencesHarbinHeilongjiangChina College of Life sciences Langfang Normal UniversityLangfangHebeiChina Institute of Horticulture Zhejiang Academy of Agricultural SciencesHangzhouZhejiangChina Guangxi Institute of Botany Chinese Academy of SciencesGuilinGuangxiChina Xi’an Botanical Garden of Shaanxi Province Institute of Botany of Shaanxi ProvinceXi’anShaanxiChina Institute of Modern Agricultural Research Dalian UniversityDalianLiaoningChina Bioinformatics Center College of Plant Science and TechnologyBeijing University of AgricultureBeijingChina College of Agriculture Eastern Liaoning UniversityDandongLiaoningChina Dalian Institute of Chemical Physics Chinese Academy of SciencesDalianLiaoningChina State Environmental Protection Key laboratory of Regional Eco-process and Function Assessment Chinese Research Academy of Environmental SciencesBeijingChina Hubei hongshan laboratory WuhanHubeiChina The New Zealand Institute for Plant and Food Research Limited AucklandNew Zealand

Actinidia arguta,the most widely distributed Actinidia species and the second cultivated species in the genus,can be distinguished from the currently cultivated Actinidia chinensis on the basis of its small and smooth fruit,rapid softening,and excellent cold *** evolution of tetraploid Actinidia species and the genetic basis of their important agronomic traits are still ***,we generated a chromosome-scale genome assembly of an autotetraploid male *** *** genome assembly was 2.77 Gb in length with a contig N50 of 9.97 Mb and was anchored onto 116 *** and clustering of 101 geographically representative accessions showed that they could be divided into two geographic groups,Southern and Northern,which first diverged 12.9 million years *** underwent two prominent expansions and one demographic bottleneck from the midPleistocene climate transition to the late *** genomics studies using paleoclimate data enabled us to discern the evolution of the species’adaptation to different historical *** genes(AaCEL1,AaPME1,and AaDOF1)related to flesh softening were identified by multi-omics analysis,and their ability to accelerate flesh softening was verified through transient expression assays.A set of genes that characteristically regulate sexual dimorphism located on the sex chromosome(Chr3)or autosomal chromosomes showed biased expression during stamen or carpel *** chromosome-level assembly of the autotetraploid *** genome and the genes related to important agronomic traits will facilitate future functional genomics research and improvement of ***.

关键词： kiwiberry dioecism adaptive evolution paleoclimate GEA rapid softening

2BDF-3.0型同步深施肥水稻穴直播机的设计与试验

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沈阳农业大学学报 2018年第3期49卷 309-314页

作者：陈雄飞王在满罗锡文臧英莫钊文杨文武张明华江西农业大学工学院南昌330045 华南农业大学工程学院/南方农业机械与装备关键技术教育部重点实验室广州510642 华南农业大学农学院广州510642

根据水稻同步深施肥精量穴播技术的要求,设计了2BD-3.0型同步侧位深施肥水稻精量穴播机,可一次性完成开沟、起垄、播种、深施肥、覆土盖肥等工序,测试分析了该机具的田间排肥性能,调查研究了机械深施肥和人工习惯施肥处理下水稻扬花期... 详细信息

根据水稻同步深施肥精量穴播技术的要求,设计了2BD-3.0型同步侧位深施肥水稻精量穴播机,可一次性完成开沟、起垄、播种、深施肥、覆土盖肥等工序,测试分析了该机具的田间排肥性能,调查研究了机械深施肥和人工习惯施肥处理下水稻扬花期不同土层中的养分分布。田间排性能试验结果表明:该机具在不同作业速度(0.1~1.3m·s^(-1))下单位面积施肥量均匀稳定,且不受机具作业速度影响,能满足实际生产中对不同施肥量的需求。大田试验结果表明:就杂交稻天优998和常规稻玉香油占2种供试验品种,在扬花期机械深施肥处理在0~5,5~10cm土层中碱解氮、有效磷、速效钾含量均高于人工习惯施肥处理,呈显著性差异;在整个耕作层(0~20cm)中碱解氮、有效磷、速效钾含量机械深施肥处理均高于人工习惯施肥处理,增幅分别为2.74~9.07,8.81~15.09,19.01~48.40mg·kg^(-1),说明采用该机具进行机械深施肥作业将有利于提高土壤保肥能力,具有节约肥料用量的潜力。

关键词：水稻同步深施肥穴直播养分分布

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提取水稻线粒体DNA的一种简易方法

四川大学学报（自然科学版） 2002年第S1期39卷 18-20页

作者：裴得胜蔡平钟李名扬阎文昭裴炎向跃武张志雄吴洁四川省农业科学院生物技术核技术研究所西南农业大学生物技术中心重庆400716 四川省农业科学院生物技术核技术研究所成都610066 西南农业大学生物技术中心

介绍了一种利用常用的普通试剂提取水稻线粒体DNA的简便方法 .与其它方法相比较 ,它具有省时、省钱、高效、快捷、简单等特点 .用该方法提取的水稻线粒体DNA ,经紫外分光光度计测定其纯度、限制性内切酶进行酶切和随机引物进行RAPD反应... 详细信息

介绍了一种利用常用的普通试剂提取水稻线粒体DNA的简便方法 .与其它方法相比较 ,它具有省时、省钱、高效、快捷、简单等特点 .用该方法提取的水稻线粒体DNA ,经紫外分光光度计测定其纯度、限制性内切酶进行酶切和随机引物进行RAPD反应的结果表明 ,完全可以满足作为RFLP和RAPD等分析质量的要求 .

关键词：水稻线粒体DNA 提取纯化酶切 RAPD

Radioiodine labeled SP-4 as an imaging agent foratherosclerotic plaques

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Nuclear science and Techniques 2000年第4期11卷 234-239页

作者： zhang Yong-Xue, wu Zhi-Jian, CAO Wei (Union Hospital, Huazhong University of science and technology, wuhan 430022) 华中科技大学湖北武汉 430022

The clinical prospect of radioiodinated SP-4 as an atherosclerotic plaque imaging agent was studied. The SP-4 was synthesized by a solid phase method and identified by an amino acid analysis after purification with HPLC. SP-4 was labeled with 131I and 125I by the Chloramine--T method and purified through Sephadex G25 column. Tewlve New Zealand rabbits were divided into an atherosclerotic group (n = 7, AR) and a control group (n = 5, NR ). All of the atherosclerotic rabbits were intravenous administrated with bovine serum albumin, then fed with high cholesterol and fat diet. 125I-SP-4 was intravenous administrated to the rabbits of both groups. The biodistribution of 125I-SP-4 in rabbits was investigated. The uptakes (%ID/g) in blood and thoracic aorta and abdominal aorta were calculated 4 hours postinjection. Macroautoradiography and microautoradiography were performed in 2 AR atheroscle-rotic abdominal aortas. The clearance of radioactivity from plasma was very rapid. 125I-SP-4 was mainly excreted through kidneys. The radioactive uptakes of abdominal aorta and thoracic aorta of AR at 4hours postinjection were significantly higher than that of NR. The films of macroautoradiography showed focal accumulation of the radioactivity in the areas of a newly formed edges of atherosclerotic plaques. On the slices of microautoradiography, the obvious radioactive accumulation could be found in the atherosclerotic plaques. Thus it was seen that the SP-4 remained its biological activity after radioiodination and was located at atherosclerotic lesions, it is potentially useful as an atherosclerotic plaque imaging agent.

关键词：放射性碘标记 SP-4 临床应用放射性显像药物诊断动脉粥样硬化实验兔动物实验

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江黄颡鱼的仔稚鱼发育及行为生态学

水产学报 2005年第4期29卷 487-495页

作者：王武边文冀余卫忠石张东上海水产大学生命科学与技术学院江苏省淡水水产研究所上海水产大学生命科学与技术学院上海200090 江苏南京210017

江黄颡鱼从出膜仔鱼至夏花历时26d。仔、稚鱼发育分为仔鱼前阶段、仔鱼阶段、稚鱼前阶段和稚鱼阶段;每个阶段又分为3个时期,共12个时期。其中仔鱼前期分为附着期、平游期和开口期。在仔鱼附着时期要提供合适的附着物;仔鱼开口时期的饵... 详细信息

江黄颡鱼从出膜仔鱼至夏花历时26d。仔、稚鱼发育分为仔鱼前阶段、仔鱼阶段、稚鱼前阶段和稚鱼阶段;每个阶段又分为3个时期,共12个时期。其中仔鱼前期分为附着期、平游期和开口期。在仔鱼附着时期要提供合适的附着物;仔鱼开口时期的饵料是小型枝角类。仔鱼阶段仍为混合营养阶段,除消耗卵黄外,其主要摄食枝角类。进入稚鱼阶段后,其食性先后经2次转食:第1次由浮游动物转为底栖动物;第2次转食由底栖动物转为以动物性饵料为主的杂食性,并开始摄食人工精饲料。根据江黄颡鱼仔、稚鱼的发育特性,提出了一整套提高江黄颡鱼出苗率和成活率的科学方法。

关键词：江黄颡鱼仔稚鱼发育行为生态学

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极边扁咽齿鱼人工繁殖技术

水产学报 2010年第11期34卷 1698-1703页

作者：张艳萍娄忠玉苏军虎焦文龙王太龚雪芬祁世会吴建平魏彦明甘肃农业大学动物科技学院甘肃省水产科学研究所甘肃省冷水性鱼类种质资源与遗传育种重点实验室甘肃农业大学生命科学技术学院甘肃农业大学动物医学院

捕获黄河上游玛曲段极边扁咽齿鱼,在甘肃省临夏国家级鲑鳟鱼良种场驯养后,进行人工繁殖研究。结果发现,极边扁咽齿鱼繁殖期为5-6月,雌鱼和雄鱼都在6龄达到性成熟,雌鱼成熟系数为18.19%～23.02%,雄鱼成熟系数为7.13%～8.34%。成熟卵径为(... 详细信息

捕获黄河上游玛曲段极边扁咽齿鱼,在甘肃省临夏国家级鲑鳟鱼良种场驯养后,进行人工繁殖研究。结果发现,极边扁咽齿鱼繁殖期为5-6月,雌鱼和雄鱼都在6龄达到性成熟,雌鱼成熟系数为18.19%～23.02%,雄鱼成熟系数为7.13%～8.34%。成熟卵径为(2.1±0.1)mm,每克卵子数为134.9粒,绝对繁殖力为12630～40470粒,相对繁殖力为每克体重12.6～28.78粒。通过干法授精,两年累计孵化极边扁咽齿鱼受精卵14万粒,平均受精率87.5%,平均发眼率77.5%,平均上浮率72%,发育平均积温为6321.5℃·h。

关键词：极边扁咽齿鱼亲鱼培育人工繁殖