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Search Results: 1 - 10 of 105827 matches for " 董石羽WEI Feng "
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地铁客室乘坐设备人机功能尺寸设计
Man-Machine Functional Dimension Design of Riding Equipment in Subway Passenger Compartments

魏峰, 徐伯初, 支锦亦, 石羽
WEI Feng
, XU Bochu, ZHI Jinyi, DONG Shiyu

- , 2018, DOI: 10.3969/j.issn.0258-2724.2018.04.027
Abstract: 为探讨乘客身材特征对地铁客室中乘坐设备功能尺寸设计的影响,运用人机工程学以人为中心的实验和相关分析法展开研究.围绕人的生理结构、心理尺度和乘坐设备的功能属性等因素,结合压力分布实验、虚拟仿真技术和主观评价分析,对人与地铁座椅和扶手之间的功能尺寸配置关系进行了测试与分析.研究结果表明:座椅腰靠纵向外凸圆弧的曲率半径为186 mm、座垫横向内凹圆弧的曲率半径为785 mm时更贴近人体坐姿的生理曲度和满足乘坐的舒适性要求;扶手的吊环高度设置在1 710 mm、横杆高度设置在1 860 mm时能够分别保障不同身材的乘客的使用需求,并能满足适用性、安全性和通行性之间的平衡.
:A human-centred experiment and ergonomic correlation-analysis approach was adopted to investigate the impact of passenger body size on the functional dimension design of riding equipment in subway passenger compartments. Subsequently, the relationship between the functional dimension configuration among passengers, subway seats, and handrails was tested and analysed based on human physiological structure, psychological endurance, and functional properties of riding equipment. This was achieved by combining a pressure distribution experiment with virtual simulation technology and subsequent subjective evaluation and analysis. Results demonstrate that when the curvature radius of the backrest outer convex arc measures 186 mm while that of the cushion inner concave arc measures 785 mm, seat surface closely matches the physiological curvature of the body-sitting posture, thereby meeting the requirements of riding comfort. Also, when the height of handrail rings and that of cross rods are set as 1 710 mm and 1 860 mm, respectively, handrail height meets usage requirements of passengers having different bodies sizes as well as that of balance between applicability, safety, and accessibility
设计战略探析
石羽
包装工程 , 2014,
Abstract: 目的 研究目前属于设计管理热点的设计战略理论。 方法 对设计战略的概念、研究现状进行梳理和介绍, 对设计战略的特点, 设计战略对于企业的作用 , 以及设计战略的实现流程进行了阐述。结论 提出设计战略应具有全局性、竞争性、导向性、创新性、稳定性、独特性和伦理性特点, 设计战略的实现流程主要涉及调研分析、制定设计战略、评估并确定设计战略、实施设计战略4个阶段。
基于人类行为学的触屏手机手势交互设计研究
孙岩,石羽,徐伯初,向泽锐,魏峰
包装工程 , 2015,
Abstract: 目的 从人类行为学角度对产品的使用特点进行研究, 探讨符合使用者操作触屏手机习惯的人性化交互设计方法。方法 对志愿者的手部尺寸及其对触屏手机手势交互操作进行统计分析, 完成从定量到定性的实验及分析; 根据实验及分析结果, 以用户体验为中心, 遵循人类行为学原则, 提出触屏手机手势交互设计人性化存在的问题, 并研究得出优化设计方案。结论 给出两个基于人类行为学的触屏手机虚拟键盘设计方案, 将触控面积提高到现有手机的2.19倍; 简化操作步骤, 增强键盘录入的效率、 准确性和易用性。
Debate and revelation arose from DDT
DDT引发的争论及启示

WEI Feng,DONG Yuan-hua,
魏峰
,元华

土壤 , 2011,
Abstract: This paper,along the historical track and trend of DDT from its synthesis in 1874 to its elimination by 2020,partitioned first the development of DDT into 4 phases by combining the historic important events with the number of SCI-cited publications,highlighted 3 debates arose from this omnipotent pesticide: the effect of DDT on human health,use DDT or not,and how to assess DDT.Furthermore,this paper obtained some revelations from the analyses on the course of DDT from human pet to human foundling,and pointe...
Group Ranking Sequence Decision for Recommendation of Messaging APP  [PDF]
Wei-Feng Tung
Open Journal of Social Sciences (JSS) , 2014, DOI: 10.4236/jss.2014.27002
Abstract:

This research is to develop a novel recommendation service using a unique group ranking sequence technique “Mining Maximum Consensus Sequences from all Users’ Partial Ranking Lists (MCSP)”. MCSP is capable of determining the product’s sequence recommendations based on k-item candidate sequences and maximum consensus sequences. This paper also illustrates the complete decision procedures of group ranking sequences. In terms of popular information products, we select “messaging app” to reveal the MCSP’s group ranking sequence decision. The recommendation service provides that query users search for the product’s recommendation (i.e., messaging app) according to the preference sequences from query users themselves and a great deal of preference sequences from the other users. This paper consists of the definitions, procedures, implementation, and experiment analysis, as well as system demonstrations of MCSP respectively. This research contributes to a kind of systematic service innovation.

Defects in transition between different filament structures in dielectric barrier discharge
介质阻挡放电丝结构转变中的缺陷研究

Dong Li-Fang,Li Shu-Feng,Fan Wei-Li,
丽芳
,李树峰,范伟丽

物理学报 , 2011,
Abstract: The defects in the transition from square to square grid states are studied in a dielectric barrier discharge. It is found that there exist two kinds of defects in this transition, which are angle defect and dislocation defect. In order to investigate the formation mechanism of the defects, the light emissions from different filaments are measured, which show that the light intensity of filament in the middle of the octagonal cell is larger than that in the side. By introducing the quasi-potential field, the interactions between filaments as well as their influences on the transition between different structures are studied. From above analyses, the defects that could emerge in the transition are suggested, which are in good agreement with that observed in experiments.
A technique for distinguishing dynamical species in the temperature time series of Yangtze River delta
基于条件熵长江三角洲温度的非线性动力学特征分析

Feng Guo-Lin,Hou Wei,Dong Wen-Jie,
封国林
,侯威,文杰

物理学报 , 2006,
Abstract: The conditional entropy of two symbolic sequences which are encoded faithfully from two different time series is minimized at the zero relative shift of the two time series if the two time series have their origins in the same underlying dynamics. This technique is also useful in studying the delayed coupling between different time series. Applications are made to the temperature data derived from five meteorological stations in China, namely Shanghai, Nantong, Changzhou, Nanjing and Hangzhou in order to test the commonality of their underlying dynamics, obtain the relative strength of the dynamics coupling between different variables, and extract the implicit delayed information in the dynamics.
Investigation about the Lorenz model and logistic equation based on the complexity
基于复杂度分析logistic映射和Lorenz模型的研究

Hou Wei,Feng Guo-Lin,Dong Wen-Jie,
侯 威
,封国林,文杰

物理学报 , 2005,
Abstract: 采用三次粗粒化方法得到了logistic映射和Lorenz模型的符号序列,运用动态非线性时间序 列分析方法——Lemper-Ziv复杂度,分别对两组符号序列进行了对比分析.对于logistic映 射,其复杂度反映了时间序列的演化;Lorenz模型三个分量的复杂度序列都具有混沌性质, 即由许多振幅非常接近而长度完全不同的循环所组成,反映了Lorenz模型内在的准周期特性 .进一步研究发现,当取不同的窗口长度时,复杂度序列的特征基本相同,并且复杂度反映 了时间序列的时空特性.因此,可以借助复杂度的计算来反演观测资料的动力学结构.
Optical Power Characteristics of Guided Modes in A Double-Cladding Chiral Optical Fibe
双包层手性光纤中导模的光功率特性

DONG Jian-feng,TAO Wei-dong,XU Jian,
建峰
,陶卫东,徐键

光子学报 , 2007,
Abstract: Based on the analysis solution of a W-type double-cladding chiral optical fiber, the optical power characteristics of several lower-order guided modes have been investigated. The optical power in the core as a function of chirality parameters in the core, the inner and outer claddings is calculated for different inner cladding thickness. The effect of chirality parameters on the optical power in the core for guided modes with different index signs is discussed. Thicker inner cladding results in larger optical power in the core. With increasing the chirality parameter in the core, the optical power of HE-11 mode and HE-21 mode (HE01 mode) in the core increase slowly, but the power of HE11 mode and HE21 mode (HE02 mode) in the core decrease gradually. The effect of the chirality parameter in the cladding is reversed with that in the core.
合并慢性病的老年心房颤动患者消融术后复发危险因素研究
Risk factors of recurrence of atrial fibrillation in aged patients with chronic diseases after cryoballoon ablation

凤伟,马佳莉,张莹
DONG Feng-wei
, MA Jia-li, ZHANG Ying

- , 2018, DOI: 10.3969/j.issn.1674-8115.2018.09.015
Abstract: 目的 ·描述合并慢性病的老年心房颤动(房颤)患者经消融术后房颤复发率,探讨其相关因素。方法 ·采用方便抽样法选择 2016年 10月—2018年 1月期间于上海交通大学医学院附属瑞金医院心内科行冷冻球囊导管消融术的老年房颤患者 159例。采用 ZUNG抑郁自评量表( self-rating depression scale,SDS)及房颤卒中风险评分系统 CHA2DS2-VASc对患者进行调查。术后 3个月,通过门诊及电话方式对患者的主诉、心电图、 24 h动态心电图等进行随访。采用 Logistic回归模型分析患者房颤消融术后复发的独立危险因素。结果 ·成功随访 152例患者,随访完成率为 95.6%。患者平均年龄为( 61.9±8.9)岁,平均随访时间为( 8.35±2.41)个月。术后房颤复发 41例,复发率为 27.0%。Logistic回归分析显示,合并症≥ 2种(与合并症 0~ 1种相比)(OR2.466,95% CI为 1.375~ 4.452)、CHA2DS2-VASc评分≥ 2分(OR2.088,95% CI为 1.142~ 5.557)、未规律使用抗心律失常药( OR1.581,95% CI为 1.351~ 2.125)、高血压( OR1.317,95% CI为 1.076~ 2.809)和体质量指数( body mass index,BMI)(OR1.147,95% CI为 1.009~ 1.174)均为术后复发的独立危险因素。结论 ·冷冻球囊导管消融术后患者仍存在一定比例的复发率,合并症≥ 2种、高血压、CHA2DS2-VASc评分≥ 2分、BMI升高以及未规律使用抗心律失常药物是术后房颤复发的潜在危险因素。
:Objective · To evaluate the recurrence rate of atrial fibrillation (Af) and its related risk factors in aged patients with chronic diseases after cryoballoon ablation. Methods · With the method of convenient sampling, a total of 159 patients with Af after cryoballoon ablation were enrolled in the Department of Cardiology, Ruijin Hospital Oct. 2016 to Jan. 2018. Self-rating depression scale (SDS) and CHA2DS2-VASc scores [congestive heart failure, hypertension, age ≥75 y (doubled), diabetes mellitus, stroke(doubled)-vascular disease, age 65-74 and sex category(female)] were used to assess the patients. Follow-up checks consisted of chief complaint, postoperative electrocardiogram (ECG), and 24 h Holter monitoring. Logistic regression models were performed to explore the independent risk factors of Af recurrence after cryoballoon ablation. Results · 152 patients (95.6%) completed the follow-up checks, with an average age of (61.9±8.9) years. The average time of follow-up period was (8.35±2.41) months. A total of 41 patients (27.0%) developed Af after cryoballoon ablation. Logistic regression analysis showed the number of chronic disease ≥2(OR2.466, 95% CI 1.375-4.452), CHA2DS2-VASc scores ≥ 2(OR2.088, 95% CI: 1.142-5.557), irregular of anti-arrhythmic drugs (OR1.581, 95% CI: 1.351-2.125), hypertension (OR1.317, 95% CI: 1.076-2.809), and body mass index (BMI) (OR1.147, 95% CI: 1.009-1.174) were the independent risk factors of Af recurrence. Conclusion · There is still a certain percentage of recurrence in aged patients with chronic diseases after cryoballoon ablation. 2 and more chronic diseases, irregular of anti-arrhythmic drugs, hypertension, CHA2DS2-VASc scores ≥ 2, and overweight may be potential risk factors of Af
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