With the rapid growth of wind power installed capacity in recent years, distribution farms will be relatively dense, and there are usually multiple same area. However, due to complex correlations dependencies among these farms, traditional forecasting models for individual difficult apply. Meanwhile, accurate output is very important evaluation results renewable energy consumption grid, this problem has received extensive attention from many scholars. To improve accuracy forecasting, we...

Purpose To evaluate axial length (AL) measurement failure rate with the IOLMaster (Carl Zeiss AG, Germany) and Lenstar LS 900 (Haag-Streit Switzerland) in eyes cataract. Methods Two hundred ninety-six of 170 patients cataract were enrolled. Cataract type severity graded using Lens Opacities Classification System III (LOCS III) AL measurements attempted (version 5.4) 1.1). Chi-squared analysis was used to assess if difference acquisition statistically significant between two devices. The...

The electric field is critically important in the process of a partial discharge (PD), as it affects many physical parameters such electron temperature and ion drift velocity. To explore PD mechanism, induced second harmonic generation (E-FISH) method, which an accurate measurement transient intensity, adopted, one specific electrode configuration designed to reduce dispersion results. In sample, aluminum oxide ceramic sheet pasted on metal plane electrode, copper foil center, ensuring...

The traditional optical flow method is based on the assumption of spatial consistency field. It easy to reduce tracking quality and even lead loss target in areas image feature missing, boundary occlusion. A semi-dense proposed realise stable features. Firstly, points are preserved by calculating pixel with large change gradient image; Secondly, according principle grey level invariance, difference function between corresponding adjacent frames constructed; Finally, descent used optimise...

Background Biometry of the anterior ocular segment parameter is very important for diagnosis and treatment glaucoma injury as well measurement intraocular lens(IOL). Objective This study was to compare differences in chamber depth(ACD) central corneal thickness (CCT) between Sirius Pentacam evaluate agreement these two methods. Methods The ACD CCT 38 right eyes from health volunteers aged 23- 32 years were measured with both Sirius.Three times pedormed on each eye method obtain average...

Ein enger elektrischer Kontakt besteht zwischen einem substituierten Polymetaphenylenvinylen (PmPV) und Bündel von Einzelwand-Nanoröhren (SWNT), wie durch kraftmikroskopische, optische elektronische Messungen an isolierten SWNT/PmPV-Strukturen (siehe Bild) gezeigt wurde. Mithilfe PmPV könnten SWNTs möglicherweise einfach "funktionalisiert" werden, ohne deren elektrischen Eigenschaften zu stören.

To investigate characteristics of the acute angle-closure crisis (AACC) and fellow eyes using confocal microscopy.Unilateral AACC patients hospitalized at Xi'an People's Hospital from October 2017 to 2020 were recruited in this cross-sectional study. Age-matched participants scheduled for cataract surgery enrolled as a healthy control group. Corneal epithelial cells, subepithelial nerve fiber plexus, stromal endothelial cells examined by specular microscopy.This study 41 unilateral (82 eyes)...

<b><i>Introduction:</i></b> Acute primary angle closure (APAC) is often characterized by acute elevation of intraocular pressure accompanied severe ocular and systemic symptoms. Excessive collagen accumulation, which can be caused upregulated heat shock protein 47 (HSP47) expression, produce scarring in rat conjunctival blebs. Meanwhile, the presence HSP47 human aqueous humor its levels are yet to determined. <b><i>Methods:</i></b> We examined...

Wheel-rail contact stress is foundation of the relationship between wheel and rail, also an important basis for investigating further wear, surface damage other problems rail system. A three dimension elastic-plastic wheel/rail model established using non-linear finite element method. The changes normal stress, Mises deformations are analyzed under different conditions in heavy haul railway. method provided a future study wheel-rail fatigue cracks germination development this paper.

Objective To evaluate the longitudinal chromatic aberrations (LCAs) of spherical, aspherical and toric intraocular lenses (IOLs) under polychromatic light based on a schematic eye. Methods Using Zemax software, Hwey-Lan Liou eye was set up LCAs Tecnis ZA9003 IOL, YA60BB SN60AT IOL were evaluated by ray tracing method. Results The 2.34 D for 2.35 1.57 2.06 IOL. The higher Abbe number means lower LCA; T3, T4, T5 IOLs displayed same LCAs. LCA larger short wavelengths compared to...

Background Toric intraocular lens (IOL) has two optical powers in perpendicular directions, and it could result many different optic performance from spherical IOL. Objective This study was to evaluate the depths of focus spherical, aspherical Toric IOL under polychoromatic light by Hwey-Lan Liou schematic eye. Methods Hwey-Lan eye created using Zemax software, alterations focusing depth Tecnis ZA9003 (a IOL), SN60AT IOL(a Arcysof were evaluated compared based on ray tracing...

Background Axial length and anterior chamber depth are important parameters for the calculation of diopter intraocular lens ( IOL ). Objective This study was to investigate compare measuring outcomes axial with IOLMaster,Axis- Ⅱ A-scan ODM 1000A sonograph.Methods a observational study.Axial were measured in 83 eyes 48 patients IOLMaster,Axis-Ⅱ sonograph by same operator.The results compared among three methods.Results The were(25.79±0.85) mm,(25.72± 0.82 )mm 26.00 ±0.83 respectively Axis-...

Glaucoma following cataract surgery in infant is a delayed complication of congenital and infantile surgery.The incidence increased with duration follow-up.There are many risk factors for the development glaucoma have,including age at surgery,microcornea,central corneal thickness,persistent fetal vasculature,cataract operating procedure genetic factors.Primary intraocular lens implantation may be protective factor.The treatment difficult.Aqueous drainage devices moderately successful.In...

Haag-Streit's new laser optical biometer called Lenstar 900 provides the user with a complete biometric assessment of patient's eye in single measurement procedure,including pachymetry,anterior chamber depth,lens thickness,axial length,keratometry,limbal diameter,pupillometry,eccentricity visual axis and retinal thickness.This article basic overview underlying principles describes clinical application,benefits limitations Lenstar. Key words: Optical biometer;  Lenstar;  Refraction ; ...

Objective To study the histology of pterygia in vivo by confocal microscopy. Methods Series case study. Fourteen pterygium eyes 11 patients were selected for using mieroscopy. Results Two kinds epithelial cells observed transitional zone cornea and pterygium. Superficial epithelium characterized as polygon with brightly refractive border. There many mature Langerhans big irregular significantly decreased nuclear/cytoplasm ratio within Epithelial. Irregularly reflective presented corneal...

The choice of switching frequency is a very important issue for the development Parallel Active Power Filter (PAPF), but so far lack discussion in quantitative manner from previous publications. In this paper, an extensive analysis on to performance PAPF carried out, and specification values with different compensation results presented. First, approximate models are considered as first-order inertia element second-order oscillation respectively. magnitude phase each order harmonic current...

Objective To evaluate the effect of coreoplasty in ocular injury.Methods In this retrospective study,18 eyes 18 patients with pupil abnormality,cataract and lens luxation caused by injury were treated combined IOL implantation and/or anterior segment vitrectomy from February 2011 to 2012 our hospital.All followed up for two months six months.Results Visual acuity improved postoperatively.The pupils all round or nearly round.The 16 at center central position,and deviated 2 eyes.Hyphema...

Background Clinical research showed that the corneal endothelial cell density value from different specula microscopies exist diversity.The relevant literature of SP02,Tomey EM-3000 and SP3000P is still seldom up to now. Objective This was assess repeatability measurements by respectively agreement among 3 kinds microscopes. Methods Fifty-four healthy volunteers with age 17-38 years old were included this research.The written informed consent obtained each subject before examination.The...

Objective To evaluate the surgical effect of congenital prelental membrane.Methods In this retrospective study,Four eyes 4 patients with membrane were treated peeling from January 2010 to December 2011 in our hospital.All followed up for 6-12 months.Results follow-up period,all lens kept clear.A 9-year-old child who was able cooperate examination visual acuity accept amblyopia training after operation,a year later,the UCVA improved 0.4 0.5,the BCVA 0.8.Conclusion Membrane is a safe and...

Objective To understand the psychological change,mental pressure and relative factors of anxiety in patients with retinal re - detachment to provide basis for systematic nursing.Methods Ninety were selected surveyed general condition questionnaire,psychological state questionnaire Zung's Self-rating Anxiety Scale (SAS).Results Their SAS score was (45.4 ± 10.1) points,with significant difference from Chinese normal (t=51.990,P ＜ 0.01).The value female significantly higher than that male [...