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儿童腺样体肥大病因及治疗的研究进展

中医眼耳鼻喉杂志 2024年第4期14卷 220-222,227页

作者：彭君毅王彬晨杜平功滨州医学院口腔医学院山东烟台264000 滨州医学院附属烟台口腔医院口腔颌面外科山东烟台264000

儿童腺样体肥大(Adenoidal Hypertrophy,AH)是耳鼻喉学科常见疾病之一,临床表现有鼻塞鼻漏、张口呼吸和“腺体样面容”等。长期AH还可引起阻塞性睡眠呼吸暂停低通气综合征(Obstructive Sleep Apnea Hypopnea Syndrome,OSAHS)、分泌性中... 详细信息

儿童腺样体肥大(Adenoidal Hypertrophy,AH)是耳鼻喉学科常见疾病之一,临床表现有鼻塞鼻漏、张口呼吸和“腺体样面容”等。长期AH还可引起阻塞性睡眠呼吸暂停低通气综合征(Obstructive Sleep Apnea Hypopnea Syndrome,OSAHS)、分泌性中耳炎等疾病。AH主要由腺样体免疫紊乱导致,其发病机制尚未有系统阐述。治疗方法主要分为手术和非手术治疗。本文针对AH病因和治疗方法做如下综述,以期为AH的治疗提供新的思路。

关键词：腺样体肥大病因手术治疗研究进展

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湖南铁心杉解剖特征及其物理力学性质研究

西南林业大学学报（自然科学） 2021年第1期41卷 155-160页

作者：张勰彭俊懿石江涛徐清乾许忠坤黄帆湖南省林业科学院湖南长沙410004 南京林业大学材料科学与工程学院江苏南京210037

以82年生湖南铁心杉木材为对象,研究其主要解剖特征、物理力学性质,评估其木材品质。结果表明:铁心杉平均年轮宽度1.1 mm,心材率可达60.7%,管胞平均长度和宽度分别为3 182μm和41.93μm,长宽比为75.04;细胞壁层平均微纤丝角为13.18°;... 详细信息

以82年生湖南铁心杉木材为对象,研究其主要解剖特征、物理力学性质,评估其木材品质。结果表明:铁心杉平均年轮宽度1.1 mm,心材率可达60.7%,管胞平均长度和宽度分别为3 182μm和41.93μm,长宽比为75.04;细胞壁层平均微纤丝角为13.18°;基本密度为0.432 g/cm3,气干密度为0.509 g/cm3;铁心杉具有较小的全干干缩率和湿胀率,其顺纹抗压强度、木材抗弯强度和抗弯弹性模量分别为69.13、106.34 MPa和9.69 GPa。铁心杉木材为高强度等级,木材品质系数显著高于常见珍贵建筑结构装饰用材树种。构造特征的径向变化规律说明铁心杉的幼龄材与成熟材界定树龄为15~20 a。

关键词：铁心杉基本密度干缩率湿胀率解剖特征顺纹抗压强度

喉癌颈淋巴清扫患者术后预防性肩功能康复锻炼的效果观察

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护理学杂志 2017年第14期32卷 91-94页

作者：吴沛霞陈君仪周苹彭峥嵘复旦大学附属眼耳鼻喉科医院手术室上海200031 复旦大学护理学院

目的验证喉癌颈淋巴清扫术后患者预防性康复锻炼对于改善肩功能的效果。方法非同期对照类实验设计,将76例喉癌手术同期行颈淋巴清扫患者按时间先后分为对照组和观察组,每组38例。对照组接受头颈外科常规护理(无肩功能康复锻炼),观察组... 详细信息

目的验证喉癌颈淋巴清扫术后患者预防性康复锻炼对于改善肩功能的效果。方法非同期对照类实验设计,将76例喉癌手术同期行颈淋巴清扫患者按时间先后分为对照组和观察组,每组38例。对照组接受头颈外科常规护理(无肩功能康复锻炼),观察组接受早期预防性肩功能康复锻炼,术后3个月、6个月时采用Constant-Murley肩功能评分测评两组肩功能状况。结果术后3个月时两组患者肩功能评分均较术前下降,至术后6个月时,两组肩功能评分均呈现上升趋势。两组肩功能主观评分及客观评分的时间效应存在统计学差异(均P0.05)。结论喉癌颈淋巴清扫术后早期预防性肩颈康复锻炼的效果有限,肩功能呈现自我恢复趋势,在更充分证据产生之前,不建议临床常规开展预防性康复锻炼。

关键词：喉癌颈淋巴清扫术康复锻炼肩功能

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九寨沟黄龙地区两条新的科考生态旅游线

四川地质学报 2000年第1期20卷 68-74页

作者：杨俊义郭建强彭东刘旗四川地勘局区调队双流610213

四沟、红星岩两条旅游线 ,长约 10 8km ,旅游资源丰富 ,品位高 ,类型齐全 ,计有地质地貌类、水域类、生物类、气象气景类和人文景观类等 5大类 ,并对其进行了初步评价 ,提出了开发建议的设想。两条旅游线的发现 ,为九寨沟黄龙两个风景... 详细信息

四沟、红星岩两条旅游线 ,长约 10 8km ,旅游资源丰富 ,品位高 ,类型齐全 ,计有地质地貌类、水域类、生物类、气象气景类和人文景观类等 5大类 ,并对其进行了初步评价 ,提出了开发建议的设想。两条旅游线的发现 ,为九寨沟黄龙两个风景区之间架起了一个科考、生态旅游桥梁。

关键词：旅游资源景观特色科考生态旅游线九寨沟黄龙

Piezoelectric and deformation potential effects of straindependent luminescence in semiconductor quantum well structures

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Nano Research 2017年第1期10卷 134-144页

作者： Aihua Zhang Mingzeng peng Morten Willatzen junyi Zhai Zhong Lin Wang Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of Sciences National Center for Nanoscience and Technology (NCNST) Beijing 100083 China Department of Photonics Engineering Technical University of Denmark DK-2800 Kgs. Lyngby Denmark School of Materials Science and Engineering Georgia Institute of Technology Atlanta Georgia 30332-0245 USA

The mechanism of strain-dependent luminescence is important for the rational design of pressure-sensing devices. The interband momentum-matrix element is the key quantity for understanding luminescent phenomena. We analytically solved an infinite quantum well （IQW） model with strain, in the framework of the 6 × 6 k.p Hamiltonian for the valence states, to directly assess the interplay between the spin-orbit coupling and the strain-induced deformation potential for the interband momentum-matrix element. We numerically addressed problems of both the infinite and IQWs with piezoelectric fields to elucidate the effects of the piezoelectric potential and the deformation potential on the straindependent luminescence. The experimentally measured photoluminescence variation as a function of pressure can be qualitatively explained by the theoretical results.

关键词： piezoelectric potential deformation potential luminescence quantum well

Priming effect and its regulating factors for fast and slow soil organic carbon pools: A meta-analysis

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Pedosphere 2022年第1期32卷 140-148页

作者： Changfu HUO junyi LIANG Weidong ZHANG peng WANG Weixin CHENG Key Laboratory of Forest Ecology and Management Institute of Applied EcologyChinese Academy of SciencesShenyang 110016China Department of Grassland Resources and Ecology College of Grassland Science and TechnologyChina Agricultural UniversityBeijing 100083China Environmental Studies Department University of CaliforniaSanta Cruz CA 95064USA

The priming effect (PE) plays a critical role in the control of soil carbon (C) cycling and influences the alteration of soil organic C (SOC) decomposition by fresh C ***,drivers of PE for the fast and slow SOC pools remain unclear because of the varying results from individual *** meta-analysis in combination with boosted regression tree (BRT) analysis,we evaluated the relative contribution of multiple drivers of PE with substrate and their patterns across each driver *** results showed that the variability of PE was larger for the fast SOC pool than for the slow SOC *** on the BRT analysis,67%and 34%of the variation in PE were explained for the fast and slow SOC pools,*** were seven determinants of PE for the fast SOC pool,with soil total nitrogen (N) content being the most important,followed by,in a descending order,substrate C:N ratio,soil moisture,soil clay content,soil pH,substrate addition rate,and SOC *** directions of PE were negative when soil total N content and substrate C:N ratio were below 2 g kg~(-1)and 20,respectively,but the directions changed from negative to positive with increasing levels of this two *** with optimal water content (50%–70%of the water-holding capacity) or moderately low pH (5–6) were prone to producing a greater *** the slow SOC pool,soil p H and soil total N content substantially explained the variation in *** magnitude of PE was likely to decrease with increasing soil pH for the slow SOC *** addition,the magnitude of PE slightly fluctuated with soil N content for the slow SOC ***,this meta-analysis provided new insights into the distinctive PEs for different SOC pools and indicated knowledge gaps between PE and its regulating factors for the slow SOC pool.

关键词： boosted regression tree fresh C input recalcitrant carbon soil carbon cycling soil carbon mineralization soil moisture soil nitrogen content soil organic carbon

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玉米免耕播种机振动特性分析与优化

农机化研究 2025年第4期47卷 122-126页

作者：何俊艺何家盼湖南汽车工程职业学院湖南株洲412001

玉米免耕播种机在作业时会产生振动,影响播种机的工作效率和生产质量,故对其振动特性进行分析和优化非常重要。为此,对玉米免耕播种机振动特性进行了分析与优化。首先,通过试验测试和有限元模拟确定了播种机的振动特性,包括自然频率、... 详细信息

玉米免耕播种机在作业时会产生振动,影响播种机的工作效率和生产质量,故对其振动特性进行分析和优化非常重要。为此,对玉米免耕播种机振动特性进行了分析与优化。首先,通过试验测试和有限元模拟确定了播种机的振动特性,包括自然频率、振型等;然后,针对振动特性中存在的问题,采用了多种优化方法(如结构优化、材料优化等),以改善播种机的振动性能;最后,通过试验和仿真模拟验证了优化后的播种机性能。研究结果表明:通过优化设计,可以有效地降低播种机的振动幅值,提高工作效率和生产质量。

关键词：玉米免耕播种机振动特性自然频率振型振幅结构优化

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Adaptive Application Offloading Decision and Transmission Scheduling for Mobile Cloud Computing

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China Communications 2017年第3期14卷 169-181页

作者： junyi Wang Jie peng Yanheng Wei Didi Liu Jielin Fu Guangxi Key Lab of Wireless Wideband Communication & Signal Processing Guilin 541004 China Shanghai Astronomical Observatory Chinese Academy of Sciences Shanghai 200000 China School of Telecommunication Engineering Xi'an University Xi'an 710049 China Sci. and Tech. on Info. Transmission and Dissemination in Communication Networks Lab. Shijiazhuang 050000 China

Offloading application to cloud can augment mobile devices' computation capabilities for the emerging resource-hungry mobile application, however it can also consume both much time and energy for mobile device offloading application remotely to cloud. In this paper, we develop a newly adaptive application offloading decision-transmission scheduling scheme which can solve above problem efficiently. Specifically, we first propose an adaptive application offloading model which allows multiple target clouds coexisting. Second, based on Lyapunov optimization theory, a low complexity adaptive offloading decision-transmission scheduling scheme has been proposed. And the performance analysis is also given. Finally, simulation results show that,compared with that all applications are executed locally, mobile device can save 68.557% average execution time and 67.095% average energy consumption under situations.

关键词： mobile cloud computing application offloading decision transmission scheduling scheme Lyapunov optimization

A scenario construction and similarity measurement method for navy combat search and rescue

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Journal of Systems Engineering and Electronics 2020年第5期31卷 957-968页

作者： ZHAO Qingsong DING junyi GUO Yu LIU peng YANG Kewei College of Systems Engineering National University of Defense TechnologyChangsha 410073China

Navy combat search and rescue(NCSAR) is an important component of the modern maritime warfare and the scenario of NCSAR is the basis for decision makers to rely on. According to the core elements in the NCSAR process, the NCSAR scenario structure is constructed from seven perspectives based on the multi-view architecture framework. According to the NCSAR scenarios evolution over time, the NCSAR scenario sequence is analyzed and modeled based on the concept lattice method. Then,the incremental construction algorithm of the NCSAR scenario sequence lattice is given. On this basis, the similarity measurement index of NCSAR scenarios is defined, and the similarity measurement model of NCSAR scenarios is proposed. Finally, the rationality of the method is verified by an example analysis. The NCSAR scenario and similarity measurement method proposed can provide scientific guidance for rapid making, dynamic adjustment and implementation of the NCSAR program, and thus improve the efficiency and effectiveness of NCSAR.

关键词： navy combat search and rescue(NCSAR) scenario similarity measurement concept lattice