Results 311 to 320 of about 730,568 (347)

Phytoremediation.

Annual Review of Plant Biology, 2005
Phytoremediation, the use of plants and their associated microbes for environmental cleanup, has gained acceptance in the past 10 years as a cost-effective, noninvasive alternative or complementary technology for engineering-based remediation methods ...
Elizabeth Pilon-Smits
semanticscholar   +1 more source

Comparing ammonia volatilization between conventional and slow-release nitrogen fertilizers in paddy fields in the Taihu Lake region

Environmental science and pollution research international, 2020
Xiaodong Liu, Luying Chen, Z. Hua, S. Mei, Peng Wang, Shuwei Wang   +5 more
semanticscholar   +1 more source

Implied Volatility Forecasting Realized Volatility

2021
This chapter conducts an empirical analysis of IV to forecast the RV through testing hypothesis 1–9. The analysis includes three steps. First, estimate the IV for ATM price of currency options with 1-, 2-, and 3-month maturity during opening, midday, and closing period.
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A Stochastic Volatility Model, Volatility Smile and Forecasting Volatility

SSRN Electronic Journal, 2004
In this paper we propose a stochastic valuation model based on the Fourier transform for option price. This model can be used for the valuation of European options, characterized by two state variables: the price of the underlying asset and its volatility.
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Stochastic Volatility Models

2008
Stochastic volatility (SV) is the main concept used in the fields of financial economics and mathematical finance to deal with the endemic time-varying volatility and codependence found in financial markets. Such dependence has been known for a long time; early commentators include Mandelbrot (1963) and Officer (1973). It was also clear to the founding
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Producing more grain yield of rice with less ammonia volatilization and greenhouse gases emission using slow/controlled-release urea

Environmental science and pollution research international, 2018
Chen Guo, T. Ren, Pengfei Li, Bin Wang, Jialong Zou, S. Hussain, R. Cong, Lishu Wu, Jianwei Lu, Xiaokun Li   +9 more
semanticscholar   +1 more source

Stock Splits, Volatility Increases, and Implied Volatilities

The Journal of Finance, 1989
ABSTRACTA test of the efficiency of the Chicago Board Options Exchange, relative to post‐split increases in the volatility of common stocks, is presented. The Black‐Scholes and Roll option pricing formulas are used to examine the behavior of implied standard deviations (ISDs) around split announcement and ex‐dates.
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Controlled-release fertilizer, floating duckweed, and biochar affect ammonia volatilization and nitrous oxide emission from rice paddy fields irrigated with nitrogen-rich wastewater

Paddy and Water Environment, 2015
Haijun Sun, Hailin Zhang, J. Min, Yanfang Feng, W. Shi   +4 more
semanticscholar   +1 more source

Ammonia volatilization in Chinese double rice-cropping systems: a 3-year field measurement in long-term fertilizer experiments

Biology and Fertility of Soils, 2014
Qingyin Shang, Cuimin Gao, Xiuxia Yang, Pingping Wu, N. Ling, Q. Shen, Shiwei Guo   +6 more
semanticscholar   +1 more source

Characteristics of ammonia volatilization on rice grown under different nitrogen application rates and its quantitative predictions in Erhai Lake Watershed, China

Nutrient Cycling in Agroecosystems, 2014
Anqiang Chen, B. Lei, Wan-li Hu, Yao Lu, Yan-Ting Mao, Zongyan Duan, Zesheng Shi   +6 more
semanticscholar   +1 more source