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reflectance
بازتابندگی
Last Update: 2013-06-12
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reflectance .
قابليت انعکاس .
Last Update: 2011-10-24
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a gray card is a flat object of a neutral gray color that derives from a flat reflectance spectrum.
کارت خاکستری یک شیء مســــطح به یک رنگ خاکســـتری خنثی است، که مشتق از طیف بازتابش صاف است.
Last Update: 2016-03-03
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the absorption or reflectance in the visible range directly affects the perceived color of the chemicals involved.
جذب یا بازتابش در محدوده قابل روئیت مستقیما بر رنک درک شده مواد شیمیایی درگیر موثر است.
Last Update: 2016-03-03
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reflectance spectra were measured on a spectrometer in the wavelength interval 0.3–2.5 μm with an integration sphere
طیف بازتاب اندازه گيری در طیف سنج پرکین elmer لاندا 950 uv/vis/نیر در طول موج فاصله 0.3 – 2.5 میکرومتر با ادغام حوزه (ماژول 150 mm).
Last Update: 2017-05-30
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to qualify for a rating, roofing materials must have a solar reflectance of at least 0.65 and thermal emittance of at least 0.90.
برای درجهبندی، موادی که در بام به کار رفته اند باید انعکاس خورشیدی حداقل ۰.۶۵ و انتشار گرمایی حداقل ۰.۹۰ داشته باشند.
Last Update: 2016-03-03
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the solar reflectance of green roofs varies depending on the plant types (generally 0.3-0.5).
انعکاس خورشیدی بامهای سبز، بسته به نوع گیاه فرق دارد (معمولاً از ۰.۳ تا ۰.۵).
Last Update: 2016-03-03
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by applying a texture to the active material's surface, the reflected light can be refracted into striking the surface again, thus reducing reflectance.
با بکار بردن بافتی بر روی سطح مواد فعال، نور منعکس شده میتواند دوباره به سطح برگردانده شود، بنابراین، انعکاس را کاهش دهد.
Last Update: 2016-03-03
Usage Frequency: 1
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ft ir is more sensitive to vibrations from liquid, bound and atmospheric water than nir, which can be overcome to some extent via the use of very narrow path lengths or attenuated total reflectance (atr
ft ir نسبت به nir نسبت به ارتعاشات از آب مایع ، محدود و جوی حساس تر است ، که با استفاده از مسافت های بسیار باریک یا بازتاب کل ضعیف می توان تا حدودی بر آن غلبه کرد.
Last Update: 2019-09-29
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bears had sufficiently consistent reflectance across the overhead surface of their body that ≥50% of pixels comprising each subject could be confidently matched to its core spectral signature, boding well for detection in coarser satellite imagery
خرسها به اندازه کافی بازتاب ثابتی در سطح بالای بدن خود داشتند که ≥50٪ از پیکسلهای هر سوژه را میتوان با اطمینان با امضای طیفی هسته آن مطابقت داد، و به خوبی برای تشخیص در تصاویر ماهوارهای درشتتر کمک میکند.
Last Update: 2021-11-13
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abstract purpose:to monitor tumor blood flow noninvasively during photodynamic therapy (pdt) and to correlate flow responses with therapeutic efficacy. experimental design: diffuse correlation spectroscopy (dcs) was used to measure blood flow continuously in radiation-induced fibrosarcoma murine tumors during photofrin (5 mg/kg)/ pdt (75 mw/cm2 ,135 j/cm2 ). relative blood flow (rbf; i.e., normalized to preillumination values) was compared with tumor perfusion as determined by power doppler ultrasound and was correlated with treatment durability, defined as the time of tumor growth to a volume of 400 mm3 . broadband diffuse reflectance spectroscopy concurrently quantified tumor hemoglobin oxygen saturation (so2). results: dcs and power doppler ultrasound measured similar flow decreases in animals treated with identical protocols. dcs measurement of rbf during pdt revealed a series of pdt-induced peaks and declines dominated by an initial steep increase (average f se: 168.1 f 39.5%) and subsequent decrease (59.2 f 29.1%). the duration (interval time; range, 2.2-15.6 minutes) and slope (flow reduction rate; range, 4.4 -45.8% minute1 ) of the decrease correlated significantly (p = 0.0001 and 0.0002, r 2 = 0.79 and 0.67, respectively) with treatment durability. a positive, significant (p = 0.016, r 2 = 0.50) association between interval time and time-to-400 mm3 was also detected in animals with depressed pre-pdt blood flow due to hydralazine administration. at 3 hours after pdt, rbf and so2 were predictive (p v 0.015) of treatment durability. conclusion:these data suggest a role for dcs in real-time monitoring of pdt vascular response as an indicator of treatment efficacy
پایش غیرتهاجمی جریان خون تومور موش در طول و بعد از فتودینامیک تراپی ارزیابی اولیه اثربخشی درمانی را فراهم می کند.
Last Update: 2022-04-29
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