Physiological and psychological responses to tended plant communities with varying color characteristics

Exposure to plants has been reported to promote health and reduce stress,and plant color has direct impacts on physical and mental health.We used images of common types of tended plant communities in Shenyang,China,with combinations of yellow,green,and red foliage,as experimental stimuli.A total of 27 images were used as visual stimuli.We used electroencephalography to measureαwave activity(8-13 Hz)in 40 subjects while they viewed visual stimuli.These data were combined with subjective questionnaire data to analyze the relaxing effect of images of tended plant communities with different color types and proportions on people.The results revealed that,although there were slight differences between the electroencephalography and psychological findings,women were significantly more relaxed than men after viewing the images.Physiological and psychological responses varied with the types and proportions of colors in the tended plant communities:those of foliage with combinations of two or three colors induced stronger responses than images with a single color.Specifically,(1)for one-color plant communities,green or yellow plant communities induced a stronger relaxation effect than red plant communities;(2)for two-color plant communities,the optimal color proportion was 55%+45%,and the green+yellow and green+red color combinations induced a stronger relaxation effect;(3)for three-color plant communities,the relaxation effect was strongest when the color proportion was 55%green+25%yellow+20%red.These data would provide a plant color matching in future plant landscape design,which may be helpful for creating healthy and relaxing environments.

Concentration and Characterization of Colored Dissolved Organic Matter in the Surface Microlayer and Subsurface Water of the Yellow Sea and the East China Sea

The distribution and chemical properties of colored dissolved organic matter(CDOM) in the Yellow Sea and the East China Sea during December 2011-January 2012 were investigated. The input of freshwater and biological activities had an evident influence on the CDOM levels(characterized by the light absorption coefficient at the wavelength of 355 nm a_(355)) in the study area. The spatial distribution of CDOM levels displayed a gradually decreasing trend from the coastal waters(0.37 m^(-1)) to the open sea(0.18 m^(-1)). The spectral slope ratio(the slope ratio S_R defined as S_(275-295):S_(350-400)) during the cruise was correlated with salinity, and exhibited a large variation from inshore(average of 2.515) to offshore sites(average of 5.327) compared with the distribution of a_(355). The values of S_R were related to CDOM molecular weight(MW). The a_(355), S_R, and chlorophyll a in 37 samples collected from the surface microlayer were significantly correlated with those in the corresponding subsurface water samples, implying a strong exchange action between the microlayer and bulk water. The a_(355) and S_R of CDOM exhibited significant microlayer enrichment, with mean enrichment factors(EFs) of 1.72 and 1.62, respectively.

Study of signal-to-noise ratio driven by colored noise

This paper investigates the signal-to-noise ratio(SNR)driven by colored noise and weak input signals.Based on the Cauchy-Schwarz and Rayleigh quotients inequalities,an analytical expression of SNR is developed,and its upper band is closely related to the Fisher information of noise.For mimicking the colored noise,we adopt the first-order moving-average model and propose the optimal input signal waveform.The stochastic resonance effect in threshold systems is demonstrated for the Gaussian mixture colored noise.The obtained results will be interesting in the case of improving the nonlinear filter performance by adding noise to the weak signal corrupted by the colored noise.

星载GNSS-R检测太湖水华可行性分析

星载全球导航卫星系统反射信号(GNSS-R)属于被动遥感技术,具有数据重访周期高、全天时、全天候、信号源丰富等优势。基于此,研究星载GNSS-R检测太湖水华的可行性。星载GNSS-R可以有效检测反射面的粗糙程度,通过使用相干反射表征反射面的粗糙度,研究不同风速区间内相干反射与蓝藻水华的关系。利用2020年4—8月美国气旋全球导航卫星系统(CYGNSS)数据,计算CYGNSS镜面反射点的时延多普勒图(DDM)功率比。以“哨兵-3”卫星水色遥感仪器(OLCI)影像最大特征峰高度(MPH)算法反演出的太湖叶绿素浓度作为参照,与欧洲中期天气预报中心(ECMWF)的风速产品进行时空间线性匹配,分析发现,在1~2.5 m/s风速区间内,叶绿素浓度达到0.1 mg/L以上时,极易引起镜面反射点发生相干反射,且功率比与叶绿素浓度的相关系数为0.84,具有良好的相关性。实验结果证明了利用星载GNSS-R的功率比及相关特性实现太湖水华检测的可行性。

色光疗法在服装设计中的应用——以抑郁症患者为例

通过色彩在服装中的具体表达,分析色彩对抑郁症患者情绪的影响,采用问卷调查法及案例分析法归纳总结,得出以下结论:色光疗法在服装设计中的应用可以扩宽服装设计的方法,应多角度设计产出,使更多人关注生命价值,关注现代社会中存在的问题;在服装设计中注重营造色彩基调,可以实现缓解大众情绪和净化心灵的特殊效果。

彩色电子纸光学评价与测量方法研究

为推动彩色电子纸发展,首先介绍彩色电子纸技术分类,其次对不同技术类别电子纸的光学性能评价指标及方法、光学测量仪器等进行研究,探索使用最适合的光学指标及测量仪器来评价彩色电子纸的光学性能,为彩色电子纸的发展提供更科学的评价方法与参考依据。

Application of Different Image Processing Techniques on Aster and ETM+ Images for Exploration of Hydrothermal Alteration Associated with Copper Mineralizations Mapping Kehdolan Area (Eastern Azarbaijan Province-Iran)

The Kehdolan area is located at 20 kilometers to the?south-east of Dozdozan Town (Eastern Azarbaijan Province). According to structural geology, volconic rocks are situated in Alborz-Azarbyjan zone, and faults?are?observed?in?the?same direction to this system with SE-NW trend. The results show that kaolinite alteration trend with Argilic and propylitic veins?is the?same direction with SW-NE faults in this area. Therefore, these faults with these trends can be considered as the mineralization control for determination of the alterations. Different image processing techniques,?such as false color composite?(FCC), band ratios, color ratio composite?(CRC), principal component?analysis?(PCA), Crosta technique, supervised spectral angle mapping?(SAM), are used for?identification of the alteration zones associated with copper mineralization. In this project ASTER?data are process and spectral analysis to fit for recognizing intensity and kind of argillic, propylitic,?philic, and ETM+ data?which?are process and to fit for iron oxide and relation to metal mineralization of the area. For recognizing different alterations of the study area, some chemical and mineralogical analysis data from the samples showed that ASTER data and ETM+ data were?capable of hydrothermal alteration mapping with copper mineralization.?Copper mineralization in the region is in agreement with argillic alteration. SW-NE trending faults controlled the mineralization process.

Enhancement and modulation of terahertz radiation by multi-color laser pulses

We study theoretically intense terahertz radiation from multi-color laser pulse with uncommon frequency ratios. Com- paring the two-color laser scheme, of which the uncommon frequency ratio should be set to be a specific value, we show that by using multi-color harmonic laser pulses as the first pump component, the lasers as the second pump component can be adjusted in a continuous frequency range. Moreover, these multi-color laser pulses can effectively modulate and enhance the terahertz radiation, and the terahertz yield increases with the increase of the wavelength of the uncommon pump com- ponent and is stable to the laser relative phase. Finally, we utilize the electron densities and velocities of ionization events to illustrate the physical mechanism of the intense terahertz generation.

Effect of Asymmetric Potential and Gaussian Colored Noise on Stochastic Resonance

The phenomenon of stochastic resonance (SR) in a bistable nonlinear system is studied when the system is driven by the asymmetric potential and additive Gaussian colored noise. Using the unified colored noise approximation method, the additive Gaussian colored noise can be simplified to additive Gaussian white noise. The signal-to-noise ratio (SNR) is calculated according to the generalized two-state theory (shown in [H.S. Wio and S. Bouzat, Brazilian J.Phys. 29 (1999) 136]). We find that the SNR increases with the proximity of a to zero. In addition, the correlation time τ between the additive Gaussian colored noise is also an ingredient to improve SR. The shorter the correlation time τ between the Gaussian additive colored noise is, the higher of the peak value of SNR.

Stochastic Resonance of Instantaneous-State in Linear Regime of Single-Mode Lasers Driven by Colored Noises

根据有输入信号的单个模式的激光的激光紧张的一个线性方程，我们在单个模式的激光的 theinstantaneous 状态计算概括 signal-to-noise 比率(GSNR ) ，它被二有颜色的噪音驾驶并且在一个电子 exponential 函数形式相关。我们检测随机的回声(SR ) 也在任何时间发生在即时状态上。当拿不同信号频率时，而且，我们在三种不同形式讨论 GSNR 趋势到稳定的状态。

汽车B柱外饰板双色注塑翘曲变形分析及工艺优化

以某汽车B柱外饰板塑件[由聚甲基丙烯酸甲酯(PMMA)/丙烯腈-丁二烯-苯乙烯塑料(ABS)两种材料组成]为研究对象,以厚度比、熔体温度、保压压力、保压时间为影响因素,结合拟水平法进行Taguchi正交试验设计,基于Moldflow软件进行模拟仿真,并对试验数据进行极差、方差分析处理,最后得出最佳的双色注塑工艺组合方案。结果表明,厚度比是影响塑件翘曲变形量的最为重要的因素,其次是保压时间、保压压力,最后是熔体温度。在总厚度不变的情况下,改变PMMA/ABS的厚度比值,塑件所产生的翘曲变形量将发生改变,第一次注射的厚度越薄,所产生的翘曲变形量越大,当厚度比越趋近于1时,所产生的翘曲变形量越小。最佳工艺组合为:厚度比0.96∶1,内层(ABS层)成型阶段熔体温度240℃、保压压力80 MPa以及保压时间6 s,外层(PMMA层)成型阶段熔体温度260℃、保压压力50 MPa以及保压时间6 s。优化后得到的总翘曲量为1.435 mm,相比优化前翘曲量降低了69.7%。

高斯势分段双稳随机共振在不同噪声下的轴承故障诊断

为解决经典双稳随机共振(classical bistable stochastic resonance, CBSR)在强噪声下输出信噪比(signal-to-noise ratio, SNR)较低问题,将非饱和分段双稳随机共振(unsaturated piecewise bistable stochastic resonance, UPBSR)与高斯势(gaussian potential, GP)随机共振结合得到一种高斯势分段双稳随机共振(Gaussian potential piecewise bistable stochastic resonance, GPPBSR)。首先,将GPPBSR与CBSR、UPBSR的势函数分析对比;其次,以SNR和平均信噪比增益(mean signal-to-noise ratio increase, MSNRI)为衡量指标,分别在高斯白噪声和色噪声背景下通过遗传算法参数寻优得到SNR和MSNRI随系统参数的变化规律,其结果表明在两种噪声背景下,GPPBSR系统的SNR和MSNRI均优于UPBSR,抗噪性能更好;最后,为验证在不同场景下GPPBSR系统轴承故障诊断的实用性,将UPBSR和GPPBSR系统应用于6205-2RS JEM SKF和HRB 6205-2Z两种型号的轴承故障诊断中。仿真结果表明,GPPBSR系统在两种噪声背景下的故障信号诊断均是可行的,且比CBSR和UPBSR的性能更优越。

大脑中动脉、脐动脉、子宫动脉及脑胎盘率在胎儿宫内窘迫风险评估中的应用进展

胎儿宫内窘迫是指胎儿在子宫内由于多方面原因发生的急性或慢性缺氧而引起胎心异常、酸中毒等一系列的病理改变,若未及时发现,则会造成新生儿窒息、神经管发育异常甚至死亡等严重后果。随着医学影像学技术的发展以及多普勒超声本身所具有的安全性、可重复性等特点,彩色多普勒超声在产科的应用越来越细致化和精准化。在胎儿发生宫内窘迫时,脐动脉各血流指标均高于正常胎儿,UA-S/D>3对于大于32孕周的产妇来说意义较大。而大脑中动脉则相较脐动脉更为灵敏,其各项指标,对于28~36^(+6)周的孕妇来说,具有较高的约登指数。对于子痫前期患者来说,子宫动脉阻力的变化值与患者病情严重程度有一定相关性。脑胎盘率作为一种较新的预测指标,其价值仍具有一定争议。本综述主要探讨彩色多普勒超声在监测胎儿各项血流动力学变化指标方面的应用进展,评估其对于及时发现胎儿宫内窘迫、改善妊娠结局具有的重要意义。

槐米对棉和棉与莫代尔针织物的预媒法染色

采用单因子试验方法,以K/S值为评价指标,研究制备槐米提取液过程中的料液比和染色过程中pH值、时间、温度等参数对棉和棉莫针织物槐米染色性能的影响。研究表明,制备槐米提取液的优化料液比为1∶80,采用明矾作为预媒染剂进行染色时,纯棉和棉莫针织物的优化染色工艺为:pH值7.0,温度50℃,时间10 min。研究发现,槐米上染纯棉和棉莫针织物的速率很快,染色后织物颜色鲜艳均匀、上染效果好,且染色后棉莫针织物的DE*和K/S值均比纯棉针织物更高,色牢度更好。

‘东魁’杨梅果实色泽指标及果实内在品质相关性

研究‘东魁’杨梅不同成熟程度果实色泽指标、内在品质指标的差异,探讨色泽指标和果实内在品质之间的相关性,为杨梅果实的外观色泽评判和果实的优质采收提供一定的参考依据。以露地、大棚和高山网室4个基地栽培的‘东魁’杨梅为试材,对成熟期不同成熟程度‘东魁’杨梅果实的色泽指标L^(*)、a^(*)、b^(*)、a^(*)/b^(*)、C、H、CIRG值以及果实单果重、硬度、可溶性固形物含量、可滴定酸含量、固酸比等品质指标进行测定和分析。结果表明,随着果实成熟度提高,颜色由红色至深红色、紫红色、紫黑色不断加深,果实色泽指标L^(*)、a^(*)、b^(*)、C及H值呈降低趋势,a^(*)/b^(*)和CIRG值呈增大趋势,而果实可滴定酸含量呈降低趋势,固酸比呈增大趋势。其中CIRG值在4个基地的4个不同果实颜色中均表现出显著差异,能较好地反映杨梅果实颜色的差异,即CIRG值介于2.36~3.43果实为红色,介于3.69~4.14果实为深红色,介于4.80~5.46果实为紫红色,介于5.58~7.69果实为紫黑色,且在4个基地中CIRG值与果实固酸比均呈极显著正相关。研究认为CIRG值可用于‘东魁’杨梅外观色泽、成熟度和内在品质的量化评价。

籽粒苋籽实粉添加量对曲奇饼干品质的影响

籽粒苋籽实具有较高的营养价值。为研究籽粒苋籽实粉添加量对曲奇饼干品质的影响,对籽粒苋籽实粉营养成分进行了测定,并将其以10%,20%,30%,40%,50%的比例替代低筋小麦粉制作曲奇饼干。结果表明,籽粒苋籽实粉蛋白质、赖氨酸、膳食纤维等含量均显著高于低筋小麦粉(p<0.05)。籽粒苋籽实粉添加量对曲奇饼干延展性、质构、色泽及感官评分均有显著性影响(p<0.05)。随着籽粒苋籽实粉添加量的提高,与对照组相比,曲奇饼干水分、灰分、蛋白质、总膳食纤维、赖氨酸含量均逐渐增加,碳水化合物含量逐渐降低;曲奇饼干延展性降低,硬度、胶黏性、咀嚼性增大,弹性减小;色泽L*值和b*值逐渐减小,a*值逐渐增大;曲奇饼干感官评分呈下降趋势;综合营养成分、质构及感官评分,籽粒苋籽实粉适合添加量为10%~30%,此时,曲奇饼干营养价值提高,质构和色泽特性较好,口感较酥松,消费者可以接受。

故宫景福宫墁冰纹石的初步分析研究

墁冰纹石鲜有报道,为探索其研究性保护方法,本文对景福宫区域墁冰纹石进行了实地调研。首先,根据石墙病害调查对石块的颜色配比、病害面积等数据进行统计分析;其次,结合薄片鉴定、X射线衍射、体积密度和吸水率测试的结果进行石墙的病害分析,讨论墁冰纹石的材料、工艺等,本研究可为后续保护性修缮项目提供参考。

不同花色紫茉莉花部综合特征比较

为揭示不同花色紫茉莉的繁殖策略差异性,以紫红色、黄色、白色紫茉莉为研究对象,观察不同花色紫茉莉的花部基本特征;测定花粉量和花粉胚珠比,估算杂交指数等,分析不同花色紫茉莉的繁育系统类型。结果表明:不同花色紫茉莉的花部基本特征存在一定差异,其中黄色花和白色花的花部特征指标值差异较为明显。3种花色的紫茉莉均以自交为主,伴随异交并存,属于兼性交配系统。黄色紫茉莉的花粉量最少,存在着较为严重的花丝、花药退化现象,且结实率显著低于紫红色和白色紫茉莉。可见,3种花色紫茉莉具有不同的交配系统,显示出多样化的繁殖策略。

浅谈电视音乐节目《青岛最动听》的灯光设计

阐述电视音乐节目《青岛最动听》2021季决赛的灯光设计,分析了灯光设计思路及方案、电视画面的视觉平衡,重点分析了灯光对音乐的视觉表现。

浅谈液体姜黄及其对鸡精粉调味料着色的影响

本研究采用单因素试验法,分析了液体和粉体姜黄溶水性、添加比例及色泽等。结果表明,液体姜黄溶水性较粉体姜黄好,液体姜黄在鸡粉中添加0.013%、鸡精添加0.016%为宜,样品亮黄绿色。