Intense Mid-Infrared Laser Pulse Generated via Flying-Mirror Red-Shifting in Near-Critical-Density Plasmas

Relativistic femtosecond mid-infrared pulses can be generated efficiently by laser interaction with near-criticaldensity plasmas.It is found theoretically and numerically that the radiation pressure of a circularly polarized laser pulse first compresses the plasma electrons to form a dense flying mirror with a relativistic high speed.The pulse reflected by the mirror is red-shifted to the mid-infrared range.Full three-dimensional simulations demonstrate that the central wavelength of the mid-infrared pulse is tunable from 3µm to 14µm,and the laser energy conversion efficiency can reach as high as 13%.With a 0.5–10 PW incident laser pulse,the generated mid-infrared pulse reaches a peak power of 10–180 TW,which is interesting for various applications in ultrafast and high-field sciences.

Improved mass relations of mirror nuclei

In this study,we revisit the previous mass relations of mirror nuclei by considering 1/N-and 1/Z-dependent terms and the shell effect across a shell.The root-mean-squared deviation is 66 keV for 116 nuclei with neutron number N≥10,as com-pared with experimental data compiled in the AME2020 database.The predicted mass excesses of 173 proton-rich nuclei,including 98 unknown nuclei,are tabulated in the Supplemental Material herein with competitive accuracy.

Cleaning of two mirrors in the first mirror unit using radiofrequency capacitively coupled plasma

First mirror(FM)cleaning,using radio frequency(RF)plasma,has been proposed to recover FM reflectivity in nuclear fusion reactors such as the International Thermonuclear Experimental Reactor(ITER).To investigate the influence of simultaneous cleaning of two mirrors on mirror cleaning efficiency and uniformity,experiments involving single-mirror cleaning and dual-mirror cleaning were conducted using RF capacitively coupled plasma in the laboratory.For the test and simultaneous cleaning of two mirrors,the FM and second mirror(SM),both measuring 110 mm×80 mm,were placed inside the first mirror unit(FMU).They were composed of 16 mirror samples,each with a dimension of 27.5 mm×20 mm.These mirror samples consist of a titanium-zirconium-molybdenum alloy substrate,a 500 nm Mo intermediate layer and a 30 nm Al_(2)O_(3) surface coating as a proxy for Be impurities.The cleaning of a single first mirror(SFM)and the simultaneous cleaning of the FM and SM(DFM and DSM)lasted for 9 h using Ar plasma at a pressure of 1 Pa.The total reflectivity of mirror samples on the DSM did not fully recover and varied with location,with a self-bias of−140 V.With a self-bias of−300 V,the total reflectivity of mirror samples on the SFM and DFM was fully recovered.The energy dispersive spectrometer results demonstrated that the Al_(2)O_(3) coating had been completely removed from these mirror samples.However,the mass loss of each mirror sample on the SFM and DFM before and after cleaning varied depending on its location,with higher mass loss observed for mirror samples located in the corners and lower loss for those in the center.Compared with SM cleaning,the simultaneous cleaning of two mirrors reduced the difference between the highest and lowest mass loss.Furthermore,this mass loss for the mirror samples of the DFM facing the DSM was increased.This indicated that mirror samples cleaned face to face in the FMU simultaneously could influence each other,highlighting the need for special attention in future studies.

Fuzzy Proportional Integral Derivative control of a voice coil actuator system for adaptive deformable mirrors

Research on adaptive deformable mirror technology for voice coil actuators(VCAs)is an important trend in the development of large ground-based telescopes.A voice coil adaptive deformable mirror contains a large number of actuators,and there are problems with structural coupling and large temperature increases in their internal coils.Additionally,parameters of the traditional proportional integral derivative(PID)control cannot be adjusted in real-time to adapt to system changes.These problems can be addressed by introducing fuzzy control methods.A table lookup method is adopted to replace real-time calculations of the regular fuzzy controller during the control process,and a prototype platform has been established to verify the effectiveness and robustness of this process.Experimental tests compare the control performance of traditional and fuzzy proportional integral derivative(Fuzzy-PID)controllers,showing that,in system step response tests,the fuzzy control system reduces rise time by 20.25%,decreases overshoot by 78.24%,and shortens settling time by 67.59%.In disturbance rejection experiments,fuzzy control achieves a 46.09%reduction in the maximum deviation,indicating stronger robustness.The Fuzzy-PID controller,based on table lookup,outperforms the standard controller significantly,showing excellent potential for enhancing the dynamic performance and disturbance rejection capability of the voice coil motor actuator system.

An electromagnetic semi-active dynamic vibration absorber for thin-walled workpiece vibration suppression in mirror milling

As critical components of aircraft skins and rocket fuel storage tank shells,large thin-walled workpieces are susceptible to vibration and deformation during machining due to their weak local stiffness.To address these challenges,we propose a novel tunable electromagnetic semi-active dynamic vibration absorber(ESADVA),which integrates with a magnetic suction follower to form a followed ESADVA(follow-ESADVA)for mirror milling.This system combines a tunable magnet oscillator with a follower,enabling real-time vibration absorption and condition feedback throughout the milling process.Additionally,the device supports self-sensing and frequency adjustment by providing feedback to a linear actuator,which alters the distance between magnets.This resolves the traditional issue of being unable to directly monitor vibration at the machining point due to space constraints and tool interference.The frequency shift characteristics and vibration absorption performance are comprehensively investigated.Theoretical and experimental results demonstrate that the prototyped follow-ESADVA achieves frequency synchronization with the milling tool,resulting in a vibration suppression rate of approximately 47.57%.Moreover,the roughness of the machined surface decreases by18.95%,significantly enhancing the surface quality.The results of this work pave the way for higher-quality machined surfaces and a more stable mirror milling process.

Virtual Reality-Based Mirror Therapy for Upper Extremity Function among Stroke Patients:A Meta-analysis and Systematic Review

[Objectives]To investigate the evidence-based effect of virtual reality-based mirror therapy system(VR-MT)on upper extremity function among stroke patients.[Methods]A systematic electronic searching of the Medline,PubMed,Web of Science and CNKI was initially performed up to June 10,2024.The risk of bias of the included studies was evaluated using RevMan 5.4 software based on the Cochrane Handbook for Systematic Reviews.The random-effects model or fixed-effects models was employed to estimate the standardized mean difference(SMD).The subgroup analyses were conducted exploring theVR-MT type(immersive or non-immersive)and comparing with MT or control group.[Results]In total 8 studies with a total of 273 stroke patients were included in this review.The pooled analysis of these trials showed a statistically significant enhancement inFMA-UE scores(6 studies,SMD=0.72,[95%CI 0.37 to 1.06];P<0.0001,I^(2)=31%)and Box and Block Test(BBT)(3 studies,SMD=0.49,[95%C/0.05 to 0.93];P=0.03,I^(2)=0%),rather than Manual Function Test(MFT)scores(3 studies,SMD=0.38,[95%CI-0.09 to 0.84];P=0.11,I^(2)=0%)following the application of reality-based mirror therapy.Additionally,the subgroup analysis results indicated that immersive VR-MT can significantly improve FMA-UE(5studies,SMD=0.73,[95%CI 0.24 to 1.23];P=0.004,I^(2)=43%).In contrast,the overall effect of non-immersive VR-MT was non-significant(2 studies,SMD=0.33,[95%CI-0.69 to 1.34];P=0.53,I^(2)=72%).[Conclusions]In this systematic review and meta-analysis,our findings indicate that immersiveVR-MT has the potential to improve upper extremity function among stroke patients.

From Mirror Theory to Oedipus Complex:A Lacanian Interpretation of Night,Mother

Jacques Lacan reinterpreted Freud’s psychoanalytic theory based on Saussure’s linguistics,and his theories such as the Mirror stage and the Oedipus complex had a significant impact on contemporary psychoanalysis.In the play Night,Mother,the reasons for Jessie’s tragedy are diverse,among which the excessive protection of Jessie by her mother Thelma is an important reason for Jessie’s tragedy.Starting from Lacan’s Mirror stage theory and the Oedipus complex,this paper will explore how this intimate but heavy maternal love influenced Jessie’s path to finding her true“ego”.

Mirror Stage Theory Analysis of Bravery in Zootopia(2016)and Nezha(2019)

American Hollywood animated films have conquered the world.In recent years,many successful works have appeared in domestic animated films,bringing new vitality to the Chinese animated film industry.Based on Lacan’s Mirror Stage Theory,this study attempts to start from the bravery of Judy and Nezha,the protagonists of Zootopia(2016)and Nezha(2019).It analyzes and compares their embodiment,formation,influence and reflection with real society to solve the problems of the two brave characters’formation causes,characteristic differences and social influences,including racial discrimination,individualism in American society and family problems in Chinese society.This study sheds light on the transmission of intercultural values in animated films.

基于Mirror Driver的自适应屏幕录制算法

提出一种基于Mirror Driver的自适应屏幕录制算法MDAC,该算法运用Mirror Driver技术检测屏幕显示内容的变化,并通过检测该区域的更新频率,自适应地选择图像编码算法。实验结果表明,该算法能够在保证屏幕录像质量的情况下,大幅度降低CPU占用率和录制文件的大小。

STRUCTURE OF BLACK PATINA ON THE ANCIENT BRONZE MIRRORS

X-ray diffaction analysis(XRDA)data of the black or brown patina on the surfaces of eight kinds of bronze mirror samples show 4 or 5 broad diffuse peaks which corresponding to almost the same 20 angle, while their matixes does not.These results indicate that those diffuse peaks were produced by the SnO2, microcrystals of 3 ￣5 nm size contained in the black or brown patina.The matrix of unearthed black patina bronze mirror numbered 223, gives strong XRDA diffraction peaks, indicating that there are a large amounts of non-oxidized bronze alloy particles surrounded by SnO2,which shows that the black patinas are not wholly metallic oxides (mainly SnO2),there are also a lot of original alloys of different sizes in grain in the patina.The bright-field image of the black patina sample gives the same result.

Mirror neuron system as the joint from action to language

Mirror neuron system （MNS） represents one past decade, and it has been found to involve in multiple of the most important discoveries of cognitive neuroscience in the aspects of brain functions including action understanding, imitation, language understanding, empathy, action prediction and speech evolution. This manuscript reviewed the function of MNS in action understanding as well as language evolution, and specifically assessed its roles as the bridge from body language to fluent speeches. Then we discussed the speech defects of autism patients due to the disruption of MNS. Finally, given that MNS is plastic in adult brain, we proposed MNS targeted therapy provides an efficient rehabilitation approach for brain damages conditions as well as autism patients.

Mirror形体设计软件在下颌骨整形中的应用

目的:探索Mirror形体设计软件在下颌骨整形的应用优势。方法:将95例面部轮廓整形的患者随机分为设计组和对照组两组,应用Mirror形体设计软件对设计组患者进行术前形态分析设计、模拟术后形态,并对比测量出改变数据,对照组患者直接进行手术而不使用Mirror形体设计软件,对比两组患者术后医患满意率的差别。结果:应用Mirror形体设计软件进行术前分析设计的设计组患者,其医患满意率大于未使用设计软件的对照组患者,差别有统计学意义。结论:通过应用Mirror形体设计软件能很好的对患者形态进行测量分析,并模拟出术后形态,达到医患理想要求,并通过改变数据来指导手术进行,本系统能够加强医患之间的交流,对容貌进行定量分析诊断,使整形手术更加精准完美。

A Statistical Method for Characterizing CMOS Process Fluctuations in Subthreshold Current Mirrors

A novel method to characterize CMOS process fluctuations in subthreshold current mirrors （SCM） is reported. The proposed model is succinct in methodology and calculation complexity compared with previous statistical models. However,it provides favorable estimations of CMOS process fluctuations on the SCM circuit, which makes it promising for engineering applications. The model statistically abstracts physical parameters, which depend on the IC process, into random variables with certain mean values and standard deviations, while aggregating all the random impacts into a discrete martingale. The correctness of the proposed method is experimentally verified on an SCM circuit implemented in an SMIC 0.18μm CMOS 1P6M mixed signal process with a conversion factor of 100 in an input range from 100pA to lμA. The pro- posed theory successfully predicts - 10% of die-to-die fluctuation measured in the experiment, and also suggests the -lmV of threshold voltage standard deviation over a single die,which meets the process parameters suggested by the design kit from the foundry. The deviations between calculated probabilities and measured data are less than 8%. Meanwhile, pertinent suggestions concerning high fluctuation tolerance subthreshold analog circuit design are also made and discussed.

不同运动方式促进周围神经损伤后的功能恢复

背景:运动作为一种主动康复的方式可以改善周围神经损伤导致的功能障碍,而不同运动方式针对的病变部位及恢复机制不同。目的:综合分析不同运动方式在周围神经损伤功能恢复中的应用及机制。方法:应用计算机检索中国知网、PubMed数据库建库时间至2024年1月期间的相关文献,英文检索词为“peripheral nerves injury,spinal cord,exercise,cerebral cortex,muscle atrophy,mirror therapy,blood flow restriction training”,中文检索词为“周围神经损伤,脊髓,大脑皮质,肌肉萎缩,有氧运动,血流限制,镜像运动”,最终纳入77篇文献进行分析。结果与结论:周围神经损伤后会引起其支配骨骼肌萎缩、相应脊髓节段病变、感觉运动皮质重塑等系统性的病理变化。有氧运动可以加强免疫反应,促进神经胶质细胞极化以及神经生长因子的释放,改善功能障碍。血流限制运动可以调节肌肉生长因子的分泌,促进肌肉生长及增强肌肉力量。镜像运动在激活大脑皮质、减少皮质重塑方面有良好的作用。不同运动方式在周围神经损伤功能恢复中具有潜在的益处,然而目前仍存在一些问题和挑战,例如运动方式的选择、运动强度和频率的控制及机制的详细解析等。

基于Mirror Driver的屏幕图像捕捉技术

目前各类非高依赖DirectDraw应用中屏幕捕捉技术存在效率低下、捕捉遗漏、光标丢失以及不够稳定等问题。为此,提出基于镜像显示驱动的屏幕图像捕捉方案。设计并实现内核驱动,通过捕捉鼠标光标移动路径中的关键点再现光标轨迹,并对捕获到的变化区域集进行优化合并。实验结果证明,该方案能快速稳定地捕捉屏幕上的变化区域图像,实现光标的移动捕捉。

Analysis on Characteristic of Static Induction Transistor Using Mirror Method

A cylindrical gates model of the static induction transistor is proposed and mirror method is used to calculate the distribution of electric potential.The results show that:the potential barrier is directly determined by channel over pinched-off factor;gate efficiency η decreases as the gate dimension α 2 and shifted gate voltage are minished,and what differs from the first-order theory is that η will tend to zero at the shifted gate voltage tends to zero when V D=0;at low current,the voltage amplification factor μ increases as the drain current rising.When the drain current reaches certain degree,the voltage amplification factor keeps almost constant.In the end,an analytical description of SIT’s characteristic suited to both triode-like and mixed I-V characteristics are obtained.The predicted I-V curves are consistent perfectly with the reported experimental ones.

基于Mirror Driver的屏幕共享方案研究与实现

针对远程教学中学生机端同步显示教师机端教学内容的需求,提出了一种基于Mirror Driver的教师机端屏幕共享解决方案。该方案基于教师机端对DirectDraw非高依赖和Mirror Driver能精确高效捕捉屏幕变化区域的特点,首先对教师机端屏幕高效捕捉;然后将捕捉的变化图像压缩成JPEG格式,通过网络传输到学生机端;最后学生机端提取JPEG数据,并转换成BMP图像,将多变化区域图像合成显示。实验结果表明,此方案能够实现高效的屏幕捕捉并同步显示,具有良好的实时性,可以应用于远程监控、远程教学等领域。

基于MirrorLink的VNC屏幕映射方法改进与实现

Mirror Link是汽车行业里推出的唯一统一标准,旨在规范手机与车机互联,给用户带来方便实用的体验效果,但是Mirror Link的VNC在传输多媒体数据的时候帧率低,卡顿现象严重,且不支持语音控制,这严重影响了用户的体验效果。针对这个不足,课题组修改了VNC传输协议方法,设计出了一种新的多媒体传输方案。实验结果表明,VNC实时性有所增强,在多媒体传输中视频能够流畅播放,同时有效地降低了CPU利用率。

虚拟现实技术在周围神经损伤功能恢复中的应用

背景:虚拟现实技术是近年来较为热门的一项人机智能交互技术,已被广泛应用于休闲娱乐、职业培训及医疗康复等领域。目的:旨在探索虚拟现实技术与不同疗法联合在周围神经损伤患者功能恢复中的潜力,概述其作用机制,评估其应用效果和前景,探讨其优势和不足之处,为周围神经损伤后的康复实践提供新的思路和方法。方法:应用计算机检索中国知网、Pub Med数据库建库时间至2024年5月期间的相关文献,英文检索词为“peripheral nerves injury,virtual reality,endoplasmic reticulum stress,muscle atrophy,cerebral cortex,mirror therapy,tendon vibration,treadmill training”,中文检索词为“周围神经损伤,虚拟现实,内质网应激,肌肉萎缩,大脑皮质,镜像疗法,肌腱振动,跑步机训练”,最终纳入68篇文献进行分析。结果与结论:(1)虚拟现实技术作为一种新兴的辅助手段,通过模拟真实环境为患者提供沉浸式的多感官体验,不仅极大地丰富了康复训练的维度,还显著加速了周围神经损伤患者功能恢复进程;虚拟现实技术的作用机制是通过多感官刺激促进皮质可塑性,相邻的皮质区域入侵沉寂区,这些区域对其他输入作出反应或产生新的肌肉激活,从而促进功能恢复。(2)虚拟现实技术已与传统疗法广泛联合,展现出其独特优势。与镜像疗法联合时,虚拟现实的优势是打破了体位的限制,提前康复介入时间点;与肌腱振动联合,虚拟现实技术通过增强视觉和触觉的双重刺激增强运动错觉,显著提高患者的感知和运动能力,但也存在增加对肢体重量感知的问题;与跑步机训练联合,虚拟现实技术进一步发挥其优势,通过多感官刺激模拟现实环境进行平衡和步行功能,但晕动症等问题依旧存在。(3)因此,在实际应用中,由于虚拟现实与镜像疗法、肌腱振动联合都会增强患者运动错觉,更适用于康复早期,而虚拟现实与跑步机训练联合则适用于康复后期,帮助患者更好地回归日常生活。(4)尽管虚拟现实技术在周围神经损伤康复中已经显示出巨大的潜力,但仍存在一些问题和挑战,如晕动症、虚拟现实康复游戏的设计与应用,以及伦理方面的考量,未来的研究应着重解决这些问题,以推动虚拟现实技术在康复领域的进一步发展。

Jane Eyre, a Historic Mirror

Jane Eyre,a historic Mirror is from 3 aspects to illustrate the author's point of view in details,and the emphasis is according to the background of Victorian Age to express the society,the religion and the people's spiritual and physical life of that time.