搜索到2481篇“ PENCIL“的相关文章
Pencil drawn interdigitated capacitive sensors on wood substrate
2024年
This research presents the fabrication and characterization of an interdigitated capacitive(IDC)sensor on a wooden substrate using pencil traces.The resistance of the pencil traces decreased from 100 kΩto 5 kΩas the pencil grade shifted from HB to 8B.Concurrently,capacitance measurements revealed an increase from approximately 5 pF for a 5-finger IDC made with HB pencil to around 32 pF for an 8B pencil counterpart.Increasing the number of pencil traces from 10 to 50 resulted in a significant decrease in resistance and a proportional increase in capacitance.Application of the IDC sensor demonstrated notable changes in capacitance upon proximity and touch,with a significant decrease upon removal.The interdigitated capacitance sensor exhibits good proximity effects and contact sensitivity in touch,with capacitance increasing exponentially from 0.3 pF(7 cm)to 1.2 pF(direct contact),highlighting its ability to detect objects with high precision.Additionally,environmental factors such as temperature and humidity influence capacitance values.These findings underscore the potential of pencil-drawn IDC sensors for responsive and adaptable applications in various fields.
Abhay Singh ThakurVinit SrivastavaRahul Vaish
关键词:SENSORSCAPACITOR
The computerized LASSI-BC Test versus the Standard LASSI-L Paper-and-Pencil Version in Community-Based-Samples
2024年
Proactive Semantic Interference (PSI) and failure to recover from PSI (frPSI), are novel constructs assessed by the LASSI-L. These measures are sensitive to cognitive changes in early Mild Cognitive Impairment (MCI) and preclinical AD determined by Aβ load using PET. The goal of this study was to compare a new computerized version of the LASSI-L (LASSI-Brief Computerized) to the standard paper-and-pencil version of the test. In this study, we examined 110 cognitively unimpaired (CU) older adults and 79 with amnestic MCI (aMCI) who were administered the paper-and-pencil form of the LASSI-L. Their performance was compared with 62 CU older adults and 52 aMCI participants examined using the LASSI-BC. After adjustment for covariates (degree of initial learning, sex, education, and language of evaluation) both the standard and computerized versions distinguished between aMCI and CU participants. The performance of CU and aMCI groups using either form was relatively commensurate. Importantly, an optimal combination of Cued B2 recall and Cued B1 intrusions on the LASSI-BC yielded an area under the ROC curve of .927, a sensitivity of 92.3% and specificity of 88.1%, relative to an area under the ROC curve of .815, a sensitivity of 72.5%, and a specificity of 79.1% obtained for the paper-and-pencil LASSI-L. Overall, the LASSI-BC was comparable, and in some ways, superior to the paper-and-pencil LASSI-L. Advantages of the LASSI-BC include a more standardized administration, suitability for remote assessment, and an automated scoring mechanism that can be verified by a built-in audio recording of responses.
Rosie E. Curiel CidAlexandra OrtegaUbbo VisserMarcela KitaigorodskyD. Diane ZhengDiana HincapieKirsten Horne CrenshawAshleigh BeaulieuBrooke BosworthLiz GallardoEmory NeerSofia RamirezElizabeth A. CroccoMike GeorgiouEfrosyni SfakianakiDavid A. Loewenstein
指向核心素养的初中英语单元教学设计研究——以Unit 3 Is this your pencil?为例
2024年
为提高初中英语教学的针对性和实效性,促进学生英语学科核心素养的形成,以人教版初中《英语》七年级(上)Unit 3 Is this your pencil?为例,探索指向核心素养的初中英语单元教学设计。提出研读课程标准,明确单元主题;强化教学分析,明确教学目标;做好课时安排,构建教学流程;规划教学过程,细化教学内容;围绕学生特点,丰富教学方法;注重评价设计,促进优化改进等策略。
宋鹏超
关键词:初中英语单元教学设计单元主题
Pencil Coffee:双向选择,打造专属咖啡时光
2024年
Echo,Pencil Coffee的主理人。“因为我和朋友对咖啡的热爱,加上适时的机遇,我们决定开设了这家咖啡馆。”Echo简洁明了地分享了她开店的初衷。2020年的春天,一个充满生机与希望的季节,她和合伙人共同迎来了Pencil Coffee的诞生。
赵越史卫静(图)
关键词:咖啡馆ECHO合伙人
铅笔屑废粉末对亚甲基蓝的吸附行为研究
2024年
生活废弃物铅笔屑的粉末具有一定的吸附作用,本工作研究了其对亚甲基蓝的吸附性能。在这项工作中考察了铅笔屑粉末的用量、亚甲基蓝浓度、吸附温度及吸附时间对亚甲基蓝吸附性能的影响。实验表明铅笔屑粉末对亚甲基蓝的吸附率与铅笔屑粉末的剂量及温度呈正相关。此外,还通过计算吸附过程的热力学常数表明该吸附过程符合Freundlich等温吸附模型,其吸附动力学过程可用准一级动力学方程描述,这表明铅笔屑对亚甲基蓝染料吸附是一个自发的吸热过程。实验还研究了不同解析剂的解析效果,其结果表明乙醇对吸附的解析效果最佳,6次循环使用后,材料对亚甲基蓝的吸附率仍然达70%以上,该研究为亚甲基蓝的废水吸附处理提供了一种可行的方法。
李想王应席李玲符志鹏
关键词:亚甲基蓝动力学
硅胶笔套(苹果 Pencil Pro凌角款)
1.本外观设计产品的名称:硅胶笔套(苹果 Pencil Pro凌角款)。;2.本外观设计产品的用途:保护笔的笔套。;3.本外观设计产品的设计要点:在于形状。;4.最能表明设计要点的图片或照片:立体图1。
李金峰
PBS质子治疗系统快速日检QA方案的应用研究
2024年
目的:通过分析IBA Sphinx Compact设备在迈胜紧凑型笔形束扫描质子治疗系统上的日检QA测量结果,评价该方案在质子治疗中的临床应用价值。方法:采用Sphinx Compact设备对迈胜S250i质子治疗系统进行连续30 d的日检QA测量,分析测量结果。结果:30 d内摆位激光灯与影像中心平均偏差为(0.42±0.27)mm;高能和低能笔形束的近端及远端深度误差均在0.50 mm以内;测量的所有光斑位置偏差不超过1.00 mm,尺寸偏差不超过7.5%;影像中心与射束中心偏差不超过0.75 mm;矩形射野平坦度相对偏差在0.5%左右;方野输出剂量偏差在1.0%以内。结论:Sphinx Compact设备能准确并快速测量AAPM TG-224号报告推荐的质子系统日检QA项目,提供实用且高效的解决方案,具有很好的临床实用价值。
郑仁超卢晓光吴韦清肖志平刘飞胡广原袁响林
Improved Subsynchronous Oscillation Parameter Identification with Synchrophasor Based on Matrix Pencil Method in Power Systems
2024年
The subsynchronous oscillations(SSOs)related to renewable generation seriously affect the stability and safety of the power systems.To realize the dynamic monitoring of SSOs by utilizing the high computational efficiency and noise-resilient features of the matrix pencil method(MPM),this paper propos es an improved MPM-based parameter identification with syn chrophasors.The MPM is enhanced by the angular frequency fitting equations based on the characteristic polynomial coeffi cients of the matrix pencil to ensure the accuracy of the identi fied parameters,since the existing eigenvalue solution of the MPM ignores the angular frequency conjugation constraints of the two fundamental modes and two oscillation modes.Then,the identification and recovery of bad data are proposed by uti lizing the difference in temporal continuity of the synchropha sors before and after noise reduction.The proposed parameter identification is verified with synthetic,simulated,and actual measured phase measurement unit(PMU)data.Compared with the existing MPM,the improved MPM achieves better accuracy for parameter identification of each component in SSOs,better real-time performance,and significantly reduces the effect of bad data.
Xiaoxue ZhangFang ZhangWenzhong GaoJinghan He
关键词:SYNCHROPHASOR
漫话水性铅笔漆(二)—水性铅笔漆原理、标准及应用
2024年
在上期内容中,笔者对水性铅笔涂料作了宏观论述,包括水性涂料的发展历史和现状、铅笔领域的应用和难点,以及未来的发展方向。本期笔者将着重从微观层面对水性铅笔涂料的原理、标准及应用作一个深入剖析,不仅期待能给读者带来一些启发,更重要的是希望能给整个铅笔行业的绿色可持续发展提供一个实践的方向。
李福祥
关键词:绿色可持续发展水性涂料铅笔
基于新型改进矩阵束的便携式电网同步相量测量装置被引量:1
2024年
针对传统同步相量算法受电网间谐波影响较大的问题,本文提出了一种基于新型改进矩阵束的电网同步相量测量算法.将电网信号构建成Hankel矩阵,对其进行奇异值分解并使用自适应定阶方法滤除其中的噪声干扰分量,通过矩阵运算得到准确的电压幅值、频率及相角.经过仿真验证,本算法对含有间谐波分量的电网信号测量结果优于流行的傅里叶变换测量算法.并根据此算法设计了一款便携式电网同步相量测量装置,可解决传统同步相量测量设备体积庞大、成本较高的问题,利用高精度卫星同步信号监测晶振实际频率,动态调整采样控制参数降低采样时间误差,将同步采样的电网波形参数与时间标签等无线传输至移动终端,完成电网信号幅值、频率及相角计算.实际测试表明,本装置具有较高的测量精度,其中电压幅值、频率和相角测量误差分别为0.038 5%、0.000 51 Hz和0.053 7°,满足《电力系统同步相量测量装置检测规范》(GB/T 26862—2011),具有较强的实际应用价值.
唐求李琛恭花金辉黄潇
关键词:移动终端间谐波

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张军财
作品数:1被引量:0H指数:0
供职机构:福州大学电气工程与自动化学院
研究主题:PSS配置 PSS PENCIL 广域测量 奇异值分解
魏云峰
作品数:6被引量:9H指数:1
供职机构:清华大学
研究主题:唇口 高楼 行星轮系 尖部 缓降器
黄晨
作品数:4被引量:0H指数:0
供职机构:苏州市吴中区宝带实验小学
研究主题:MY 小学生 英语作文 持续性 LOVELY
王乐
作品数:28被引量:40H指数:4
供职机构:陕西师范大学
研究主题:教育 场馆 家庭教育 地化 乡村教育
姜思情
作品数:1被引量:0H指数:0
供职机构:安徽省濉溪县百善中学
研究主题:PENCIL OX MY 英语 -B