“两型”课堂理论研究及实践探索

“两型”课堂是指“低耗高质”“和谐共长”的课堂,研究假设理论为“教学共振”原理和“教育生态学”原理,所持观点为“教学共振”原理的运用是实现教学低耗高效的良好途径,“教育生态学”原理的运用能实现教学双主体的和谐共长。实践证明,“两型”学科课堂不同课型的教学模式和实施策略,可以改变缺乏生命活力的课堂教学现状,提高课堂教学效益,实现师生教学相长的理想状态。     

墨西哥汉语习得者的汉语单音节字调的习得

采用非随机任意抽样法抽取语音训练约100小时左右的4名墨西哥汉语习得者,对其288个普通话单音节四声的发音进行声学分析。实验数据及分析结果显示,汉语语音训练约100小时左右的墨西哥汉语习得者的普通话四声偏误和错误的特点是:(1)在调域偏误上有如下降级序列:去声>阴平>阳平;(2)在调型偏误上有如下降级序列:阳平>上声;(3)调型偏误和调域偏误>调型错误。声学分析;调类;调型;调域;错误;偏误     

光磁共振实验中干扰峰的分析及利用

本文分析了在光磁共振实验中用扫场法测量铷原子的因子时所产生干扰峰的形成原因,并且巧妙地利用干扰峰来计算地磁场的水平分量.     

Running-induced patellofemoral pain fluctuates with changes in patella water content

Abstract

Although increased bone water content resulting from repetitive patellofemoral joint loading has been suggested to be a possible mechanism underlying patellofemoral pain (PFP), there is little data to support this mechanism. The purpose of the current study was to determine whether running results in increases in patella water content and pain and whether 48 hours of rest reduces patella water content and pain to pre-running levels. Ten female runners with a diagnosis of PFP (mean age 25.1 years) participated. Patella water content was quantified using a chemical-shift-encoded water-fat magnetic resonance imaging (MRI) protocol. The visual analog scale (VAS) was used to quantify subjects' pain levels. MRI and pain data were obtained prior to running, immediately following a 40-minute running session, and 48 hours post-running. Pain and patella water content were compared among the 3 time points using one-way ANOVA's with repeated measures. Immediately post-running, persons with PFP reported significant increases in pain and exhibited elevated patella water content. Pain and patella water content decreased to pre-running levels following 48 hours of rest. Our findings suggest that transient changes in patella water content associated with running may, in part, contribute to patellofemoral symptoms.     

A CRISPR/Cas12a-empowered surface plasmon resonance platform for rapid and specific diagnosis of the Omicron variant of SARS-CoV-2

The outbreak of the COVID-19 pandemic was partially due to the challenge of identifying asymptomatic and presymptomatic carriers of the virus, and thus highlights a strong motivation for diagnostics with high sensitivity that can be rapidly deployed. On the other hand, several concerning SARS-CoV-2 variants, including Omicron, are required to be identified as soon as the samples are identified as ‘positive’. Unfortunately, a traditional PCR test does not allow their specific identification. Herein, for the first time, we have developed MOPCS (Methodologies of Photonic CRISPR Sensing), which combines an optical sensing technology-surface plasmon resonance (SPR) with the ‘gene scissors’ clustered regularly interspaced short palindromic repeat (CRISPR) technique to achieve both high sensitivity and specificity when it comes to measurement of viral variants. MOPCS is a low-cost, CRISPR/Cas12a-system-empowered SPR gene-detecting platform that can analyze viral RNA, without the need for amplification, within 38 min from sample input to results output, and achieve a limit of detection of 15 fM. MOPCS achieves a highly sensitive analysis of SARS-CoV-2, and mutations appear in variants B.1.617.2 (Delta), B.1.1.529 (Omicron) and BA.1 (a subtype of Omicron). This platform was also used to analyze some recently collected patient samples from a local outbreak in China, identified by the Centers for Disease Control and Prevention. This innovative CRISPR-empowered SPR platform will further contribute to the fast, sensitive and accurate detection of target nucleic acid sequences with single-base mutations.     

浅析超低音扬声器阵列的指向性控制

论述指向性超低音扬声器阵列的意义和实际应用价值,阐述三种常规超低音扬声器阵列的指向性基本原理,采用专用计算机软件进行模拟仿真,利用实际消声室实验对该基础理论以及计算机仿真结果进行验证及归纳总结;并针对侧墙对Front/Back阵列声辐射的影响进行探究,通过实验得出结论。     

共振的半线性Dirichlet问题解的多重性

使用Z2指标理论获得非线性非自治无界共振的半线性椭圆方程Dirichlet问题解的多重性结果。     

浅谈谐振效应在运动训练中的应用

运动训练是一项庞大的系统工程 ,优异运动成绩的取得是有诸多方面因素组成的复合体。仅从教练员与运动员如何配合来提高运动成绩加以阐述物理学中谐振效应的原理 ,通过从“体制保证 ,教练员与运动员的双向交流 ,严格管理制度 ,动力激励 ,表率示范以及清除干涉波”等促进教练员与运动员积极配合 ,以达到训练目的。     

无线供能技术在智能轮椅供电系统中的应用

利用基于谐振的无线供能技术对智能轮椅进行无接触充电设计,并利用BCI技术实现对轮椅充电开关的控制,为有肢体障碍但脑部思维正常的人乘坐轮椅出行提供一种电能补充途径.     

唢呐共鸣的合理调控

最佳唢呐音色是通过人体对乐器的全方位调控获得的,不同的演奏方法将产生不同的演奏效果,而实现人体对声源与共鸣管的合理调控,是唢呐演奏者获得最佳演奏效果的基础。