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行距配置和种植密度对棉花干物质生产及产量的影响

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作物学报 2025年第1期51卷 221-232页

作者：辛明华秘雅迪王国平李小飞李亚兵董合林韩迎春冯璐中国农业科学院棉花研究所/棉花生物学国家重点实验室河南安阳455000 中国农业科学院西部农业研究中心新疆昌吉831100

行距配置和种植密度是影响棉花产量和品质的重要因素。当前新疆棉花种植主要采用宽窄行配置,也有等行距配置方式,但对这两种方式的认识尚存在争议。为此,本研究以中棉所88号为供试材料,采用裂区设计,行距配置(等行距和宽窄行)为主区,种... 详细信息

行距配置和种植密度是影响棉花产量和品质的重要因素。当前新疆棉花种植主要采用宽窄行配置,也有等行距配置方式,但对这两种方式的认识尚存在争议。为此,本研究以中棉所88号为供试材料,采用裂区设计,行距配置(等行距和宽窄行)为主区,种植密度12×104株hm^(–2) (D1)、16×104株hm^(–2) (D2)和18×104株hm^(–2) (D3)为裂区,开展了2年大田试验,比较研究了行距配置和密度对棉花群体生长发育、干物质积累和分配、以及产量和纤维品质的影响。结果表明,中等密度(16×10^(4)株hm^(–2))下等行距和宽窄行处理组合的叶面积指数(LAI)增速、LAI峰值,以及吐絮期生殖器官生物量的分配比例均高于其他处理组合,且二者无显著差异。各处理组合间的棉花群体生长率(CGR)、净同化率(NAR)和棉铃生长率(BGR)均无显著差异。2年平均,中等密度下等行距和宽窄行处理组合的籽棉产量相当,纤维品质指标也无显著差异。表明在中等密度下,无论采用等行距还是宽窄行种植模式,均能达到理想的产量和品质。本研究为新疆棉花行距配置和密度选择提供了科学依据。

关键词：棉花单双行配置密度生长指标干物质积累与分配产量及品质

Primary intracranial synovial sarcoma with hemorrhage:A case report

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World Journal of Clinical Cases 2021年第29期9卷 8871-8878页

作者： Yang-Yang Wang Man-li li Zhi-Yong Zhang Jiang-Wei Ding li-fei xiao Wen-Chao li Lei Wang Tao Sun Department of Neurosurgery General Hospital of Ningxia Medical UniversityYinchuan 750000Ningxia Hui Autonomous RegionChina Sanquan College Xinxiang Medical UniversityXinxiang 453000Henan ProvinceChina Department of Neurosurgery The First Affiliated Hospital of Xinxiang Medical UniversityXinxiang 453000Henan ProvinceChina

BACKGROUND Synovial sarcoma(SS)is a highly malignant tumor of unknown histological *** tumor can occur in various parts of the body,including those without synovial structures,but mainly in and around the joints,mostly in the lower *** intracranial SSs are remarkably *** paper aims to report a case of primary intracranial SS with *** SUMMARY A 35-year-old male patient suffered a headache and slurred speech during manual labor and was sent to the emergency *** imaging examination,the patient was considered to have high-grade glioma complicated with hemorrhage and was treated with *** pathology revealed *** emission tomography/computed tomography was performed,which ruled out the possibility of metastasis to the intracranial from other parts of the *** radiotherapy was given to the patient,during which radiation necrosis *** months after craniotomy,cranial magnetic resonance imaging revealed recurrence of the *** Primary intracranial SS is a rare malignant *** intracranial SS with hemorrhage and radiation necrosis should be carefully monitored during postoperative *** resection of the tumor combined with postoperative radiotherapy and chemotherapy is currently used,but the prognosis is poor.

关键词： Synovial sarcoma Intracranial tumor Tumor hemorrhage Case report

Incontinentia pigmenti with intracranial arachnoid cyst: A case report

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World Journal of Clinical Cases 2022年第23期10卷 8352-8359页

作者： Wen-Chao li Man-li li Jiang-Wei Ding Lei Wang Shu-Ren Wang Yang-Yang Wang li-fei xiao Tao Sun Department of Neurosurgery General Hospital of Ningxia Medical UniversityYinchuan 750000Ningxia Hui Autonomous RegionChina Department of Neurosurgery The First Affiliated Hospital of Xinxiang Medical UniversityXinxiang 453000Henan ProvinceChina Department of Physiology Sanquan College of Xinxiang Medical UniversityXinxiang 453000Henan ProvinceChina

BACKGROUND Incontinentia pigmenti(IP)is a rare X-linked dominant genetic disorder that can be fatal in male *** is a disease that affects many systems of the human *** addition to characteristic skin changes,patients may also have pathological features of the eyes,teeth,and central nervous ***,the lesions in these systems may be the first symptoms for which patients seek *** date,no cases of IP complicated by intracranial arachnoid cyst(IAC)have been *** paper aims to report a case of IP with IAC in order to share the diagnosis and treatment experience of this rare case with other *** SUMMARY An 11-year-old female patient suffered intermittent limb convulsions for five months and was sent to *** the initial stage,the patient was considered to have primary *** investigation of the patient's medical history,physical examination and imaging examination led to the diagnosis of IP combined with intracranial space-occupying lesions,and secondary *** patient was treated with craniotomy,and postoperative pathology revealed an *** patient recovered well after craniotomy and had no obvious surgeryrelated *** the follow-up period,the patient did not have recurrent epilepsy *** IP is a multi-system disease that presents with typical skin lesions at birth,but the long-term prognosis of this disease depends on the involvement of systems other than the skin,especially nervous system and ocular lesions.

关键词： Incontinentia pigmenti Intracranial space-occupying lesions X-linked Craniotomy Case report

Assessing the impacts of natural conditions and human activities on terrestrial water storage in Loess Plateau,China

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Journal of Mountain Science 2023年第7期20卷 1921-1939页

作者： WANG Cheng-xi YAN Jian-wu liANG Wei SUN Shao-bo GOU Fen li xiao-fei LUO Yuan-yuan WANG Feng-jiao School of Geography and Tourism Shaanxi Normal UniversityXi'an 710119China National Demonstration Center for Experimental Geography Education Shaanxi Normal UniversityXi'an 710119China Institute of Surface-Earth System Science Tianjin UniversityTianjin 300072China

The gravity recovery and climate experiment(GRACE)has emerged as a crucial source of land water storage information in hydrological analysis and *** factors contribute to regional terrestrial water storage(TWS),resulting in a complex *** the Loess Plateau region,the continuous alteration of natural conditions and profound impact of human activities have posed a serious threat to the natural ecosystem,leading to an escalating trend of TWS *** the specific analysis of how natural conditions and human activities affect TWS represents a pressing *** study employed the residual analysis method to discern the contribution rates of natural conditions and human activities,elucidated the spatial and temporal changes associated with each factor,and ascertained their individual *** findings indicated that TWS on the Loess Plateau exhibited a downward trend of-4.89 mm·a^(-1)from 2003 to *** combined effects of climate change and human activities accounted for alterations in water resource reserves across most areas of the Loess Plateau,with human activities predominantly driving these *** emerged as the primary natural factor influencing TWS variations,and NDVI demonstrated a positive feedback effect on TWS at approximately 30%.Substantial spatial disparities in TWS existed within the Loess Plateau,with human activities identified as the primary cause for the decreasing *** restoration plays a positive role in saving water resources in the Loess Plateau to some extent,and vegetation growth exceeding the regional load will lead to water shortage.

关键词： Terrestrial water storage Residual analysis Human activity the Loess Plateau

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二维线性与非线性海面电磁散射特性比对研究

系统工程与电子技术 2010年第9期32卷 1837-1840页

作者：李晓飞许小剑北京航空航天大学电子信息工程学院北京100191

二维线性和非线性海面模型与低阶小斜率近似(small slope approximation,SSA)法相结合,对比研究了不同海面的统计特征及其电磁散射特性。研究表明:非线性海浪比相应的线性海浪具有更尖锐的波峰和更为平坦的波谷,虽然其高度均方根保持不... 详细信息

二维线性和非线性海面模型与低阶小斜率近似(small slope approximation,SSA)法相结合,对比研究了不同海面的统计特征及其电磁散射特性。研究表明:非线性海浪比相应的线性海浪具有更尖锐的波峰和更为平坦的波谷,虽然其高度均方根保持不变,但斜率变大,且偏离高斯分布;相应地,非线性海面归一化雷达散射截面(normalized radar cross section,NRCS)在远离镜面反射方向上略高于线性海面的NRCS,其后向散射系数也有所提高,并且该差异在小擦地角下更为显著。

关键词：线性海面非线性海面小斜率近似电磁散射

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时变海面舰船目标动态雷达特征信号模型

系统工程与电子技术 2011年第1期33卷 42-47页

作者：许小剑姜丹李晓飞北京航空航天大学电子信息工程学院北京100191

提出了一种时变海面舰船目标动态雷达特征信号的仿真方法。建立了海面舰船目标雷达回波多径效应模型、二维动态粗糙海面的时变复反射系数模型和动态海面舰船运动的水动力模型,并同目标电磁散射计算的高频方法相结合,形成了时变海面舰船... 详细信息

提出了一种时变海面舰船目标动态雷达特征信号的仿真方法。建立了海面舰船目标雷达回波多径效应模型、二维动态粗糙海面的时变复反射系数模型和动态海面舰船运动的水动力模型,并同目标电磁散射计算的高频方法相结合,形成了时变海面舰船目标动态雷达特征信号仿真模型。利用海面浮球的测量数据对模型进行了验证,并对典型舰船目标的动态雷达特征信号进行了仿真和分析。

关键词：时变海面舰船多径效应雷达特征仿真

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双轴驱动混合动力车辆能量管理策略

浙江大学学报（工学版） 2016年第12期50卷 2245-2253页

作者：江冬冬李道飞俞小莉浙江大学动力机械及车辆工程研究所浙江杭州310027

建立双轴驱动混合动力车辆(DDHEV)效率分析模型,并构建杭州市循环工况.根据动态规划控制策略的仿真结果获得新规则控制策略,评估新规则控制策略的节油效果.结果表明:相比于传统的规则控制策略,新规则控制策略可以使车辆燃油经济性在拥... 详细信息

建立双轴驱动混合动力车辆(DDHEV)效率分析模型,并构建杭州市循环工况.根据动态规划控制策略的仿真结果获得新规则控制策略,评估新规则控制策略的节油效果.结果表明:相比于传统的规则控制策略,新规则控制策略可以使车辆燃油经济性在拥堵工况下提高35.5%,在顺畅工况下提高24.9%,在高架工况下提高4.8%.为提高新规则控制策略在不同工况下的适应性,采用学习向量量化神经网络识别实际运行工况,调整相应的控制参数,并评估节油效果.结果表明:在实际运行工况下,相比于采用单个新规则控制策略,采用工况识别来调整新规则控制策略参数可使燃油经济性提高28.2%以上.所提出的模型满足了双轴驱动混合动力车辆的实际应用需求,提高了车辆的燃油经济性.

关键词：双轴驱动混合动力车辆(DDHEV) 工况构建能量管理规则提取工况识别

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含横向裂纹悬臂梁的损伤检测

上海交通大学学报 2010年第6期44卷 735-738,744页

作者：李晓飞余音上海交通大学船舶海洋与建筑工程学院上海交通大学空天科学技术研究院上海200240

研究了含有横向裂纹的悬臂梁的弯曲问题,并给出了一种对悬臂梁进行损伤检测的方法.将梁的损伤模拟为一个附加柔度,根据理论分析,建立了梁的挠度和损伤位置以及附加柔度之间的关系,定义损伤处梁的剖面惯性矩与完整剖面的惯性矩之比为惯... 详细信息

研究了含有横向裂纹的悬臂梁的弯曲问题,并给出了一种对悬臂梁进行损伤检测的方法.将梁的损伤模拟为一个附加柔度,根据理论分析,建立了梁的挠度和损伤位置以及附加柔度之间的关系,定义损伤处梁的剖面惯性矩与完整剖面的惯性矩之比为惯性矩系数,结合有限元法,建立附加柔度和惯性矩系数的关系,给出了一个由附加柔度计算惯性矩系数的公式,根据惯性矩系数估计损伤程度.通过一个梯形截面梁的算例证明,提出的计算公式和损伤检测法是准确有效的.

关键词：悬臂梁横向裂纹附加柔度损伤检测

基于Frank导联和Hermite展开的心肌梗死检测

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计量学报 2009年第6期30卷 -页

作者：葛丁飞孙丽慧文小军 Ding-fei li-hui xiao-jun 浙江科技学院信息与电子工程学院　　浙江杭州　　（310023）

多数现有的计算机辅助心电(ECG)诊断技术研究通常是基于常规心电导联展开的,而正交Frank心电导联比常规心电导联有着与解剖学更为密切的联系.基于Frank导联的心肌梗死(MI)心电特征提取和分类检测的研究,对MI ECG信号进行Hermite非线性展... 详细信息

多数现有的计算机辅助心电(ECG)诊断技术研究通常是基于常规心电导联展开的,而正交Frank心电导联比常规心电导联有着与解剖学更为密切的联系.基于Frank导联的心肌梗死(MI)心电特征提取和分类检测的研究,对MI ECG信号进行Hermite非线性展开,以Hermite系数为心电特征,并对其进行分类测试.与常规心电导联相比,此方法对早期MI和急性期MI进行分类,检测精度可分别提高30.06%和19.33%.Abstract：Most of existing computer assistanted diagnosis technique studies are performed based on standard electrocardiogram(ECG) leads. Orthogonal Frank leads are more eorrehted with anatomy compared with standard ECG leads. Myocardial infarction (MI) ECG feature extraction and detection based on Frank leads is proposed. The ECG signals are expressed by nonlinear Hermite expansion method, and Hermite coefficients are utilized as ECG features for the classification. The accuracy of detecting MI in early stage and MI in acute stage can be increased by 30. 06 and 19. 33 percentages compared with that of standard ECG leads using the proposed method.

关键词：导联 Hermite 心肌梗死检测精度 Based Myocardial Infarction 心电特征 ECG features Myocardial infarction feature extraction expansion method 分类检测 ECG signals 计算机辅助 stage based detection 诊断技术线性展开特征提取