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241.
Dhiman Pooja Rana Garima Kumar Amit Sharma Gaurav Vo Dai-Viet N. Naushad Mu. 《Environmental Chemistry Letters》2022,20(2):1047-1081
Environmental Chemistry Letters - Energy shortage and escalating pollution are major challenges globally. Heterogeneous photocatalysis is one of the most cost-effective methods for producing... 相似文献
242.
Nguyen Duyen Thi Cam Tran Thuan Van Kumar Ponnusamy Senthil Din Azam Taufik Mohd Jalil Aishah Abdul Vo Dai-Viet N. 《Environmental Chemistry Letters》2022,20(2):1421-1451
Environmental Chemistry Letters - Water contamination is an environmental burden for the next generations, calling for advanced methods such as adsorption to remove pollutants. For instance,... 相似文献
243.
Nguyen Quoc Hung Tran Anh T. K. Hoang Nhung T. T. Tran Yen T. H. Nguyen Phu X. Pham Thi Thuy Nguyen Manh Khai Van der Bruggen Bart 《Environmental science and pollution research international》2022,29(28):42074-42089
Environmental Science and Pollution Research - Single-use plastic waste is gradually considered a potential material for circular economy. Ion exchange resin obtained from polystyrene waste by... 相似文献
244.
Van Thinh Nguyen Chung Nguyen Thuy Luong Ly Thi Mai Chinh Pham Minh Anh Phan Phuong Huy Nguyen The Thuy Dang Thi Thai Phong K. 《Environmental science and pollution research international》2022,29(28):42055-42066
Environmental Science and Pollution Research - Industrial sludges from wastewater treatment plants of industrial parks and a drinking water treatment plant in northern Vietnam were investigated in... 相似文献
245.
Shahbaz Muhammad Shabani Zahra Dehghan Shahnazi Rouhollah Vo Xuan Vinh 《Environmental science and pollution research international》2022,29(46):69573-69587
Environmental Science and Pollution Research - It is essential to study CO2 emissions intensity as the most critical factor affecting temperature increase and climate change in a country like Iran,... 相似文献
246.
黎金英 《防灾减灾工程学报》2015,(4):1-5
为了实现对微电网的电压与功率的控制,针对微电源类型的差异性,通过对光伏及燃料电池等分布式电源建立数学模型并进行仿真分析,研究其对微电网的影响。提出了基于电压外环、电流内环和功率环等反馈控制器和改进的下垂控制方法的微电网分布式电源分层控制策略。利用 Matlab/simulink 仿真系统,通过在并网和孤岛两种模式中微电网的运行特性及各分布式电源在不同工作环境下微电网的功率、频率和电压曲线的变化规律的分析,验证了分层控制策略的有效性。结果表明:分层控制策略能够使各分布式电源之间较好地协调,满足微电网对其运行稳定性和电能质量的要求。 相似文献
247.
Ecological and physiological controls of species composition in green macroalgal blooms 总被引:9,自引:0,他引:9
Nelson TA Haberlin K Nelson AV Ribarich H Hotchkiss R Van Alstyne KL Buckingham L Simunds DJ Fredrickson K 《Ecology》2008,89(5):1287-1298
Green macroalgal blooms have substantially altered marine community structure and function, specifically by smothering seagrasses and other primary producers that are critical to commercial fisheries and by creating anoxic conditions in enclosed embayments. Bottom-up factors are viewed as the primary drivers of these blooms, but increasing attention has been paid to biotic controls of species composition. In Washington State, USA, blooms are often dominated by Ulva spp. intertidally and Ulvaria obscura subtidally. Factors that could cause this spatial difference were examined, including competition, grazer preferences, salinity, photoacclimation, nutrient requirements, and responses to nutrient enrichment. Ulva specimens grew faster than Ulvaria in intertidal chambers but not significantly faster in subtidal chambers. Ulva was better able to acclimate to a high-light environment and was more tolerant of low salinity than Ulvaria. Ulvaria had higher tissue N content, chlorophyll, chlorophyll b: chlorophyll a, and protein content than Ulva. These differences suggest that nitrogen availability could affect species composition. A suite of five grazers preferred Ulva to Ulvaria in choice experiments. Thus, bottom-up factors allow Ulva to dominate the intertidal zone while resistance to grazers appears to allow Ulvaria to dominate the subtidal zone. While ulvoid algae are in the same functional-form group, they are not functionally redundant. 相似文献
248.
Jan Peters Niko E.C. Verhoest Roeland Samson Marc Van Meirvenne Liesbet Cockx Bernard De Baets 《Ecological modelling》2009
Ensemble learning techniques are increasingly applied for species and vegetation distribution modelling, often resulting in more accurate predictions. At the same time, uncertainty assessment of distribution models is gaining attention. In this study, Random Forests, an ensemble learning technique, is selected for vegetation distribution modelling based on environmental variables. The impact of two important sources of uncertainty, that is the uncertainty on spatial interpolation of environmental variables and the uncertainty on species clustering into vegetation types, is quantified based on sequential Gaussian simulation and pseudo-randomization tests, respectively. An empirical assessment of the uncertainty propagation to the distribution modelling results indicated a gradual decrease in performance with increasing input uncertainty. The test set error ranged from 30.83% to 52.63% and from 30.83% to 83.62%, when the uncertainty ranges on spatial interpolation and on vegetation clustering, respectively, were fully covered. Shannon’s entropy, which is proposed as a measure for uncertainty of ensemble predictions, revealed a similar increasing trend in prediction uncertainty. The implications of these results in an empirical distribution modelling framework are further discussed with respect to monitoring setup, spatial interpolation and species clustering. 相似文献
249.
To monitor the level of soil acidification in the county of V?rmland in the middle west of Sweden 180 podzolic forest soils were investigated. Soil solutions from four horizons were obtained by centrifugation and the soil was sampled for a determination of the exchangeable pool by extraction. The concentrations of inorganic Al and its fraction of the total Al in solution were greater in the south of the county (up to 50%). The factors influencing the total Al and free inorganic Al3+ in the soil solutions were evaluated. Saturation indices (SI) for five different mineral phases were calculated but none implied equilibrium conditions. The relationships between pAl3+ and pH (in the pH range 4-6.2) gave slopes of about 1, which indicated that ion exchange/complexation reactions may be important for determining the Al3+ concentration in the B and C horizons. In the E horizon solutions complexation with soluble organic acids seemed to be the major factor which influenced the Al3+ activity. The influence of organic matter on Al solubility was supported by partial least square (PLS) regressions. 相似文献
250.
The relationship between diversity profiles,evenness and species richness based on partial ordering 总被引:4,自引:0,他引:4
Rousseau Ronald Van Hecke Piet NIjssen David Bogaert Jan 《Environmental and Ecological Statistics》1999,6(2):211-223
Problems with the notion of evenness, such as ambiguity, proliferation of indices, choice of indices, etc. can be overcome by a more fundamental, mathematical approach. We show that the Lorenz curve is an adequate representation of evenness. The corresponding Lorenz order induces a partial order in the set of equivalent abundance vectors. Also diversity can adequately be studied through a partial order and represented by a curve derived from the classical Lorenz curve. This curve is known as the intrinsic diversity profile (or k-dominance curve) and was introduced by Patil and Taillie (1979) and Lambshead et al. (1981). 相似文献