Optimal Characteristic Portfolios

2020 ◽  
Author(s):  
Richard McGee ◽  
Jose Olmo
Keyword(s):  
Optimal Characteristic

scholarly journals An Experimental Analysis of Soybean Straw Combustion on Both CO and NOX Emission Characteristics in a Tubular Furnace

Energies ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1587
Author(s):  
Qing Xu ◽  
Weichao Peng ◽  
Changming Ling
Keyword(s):  
Energy Consumption ◽  
Combustion Temperature ◽  
Energy Utilization ◽  
Average Weight ◽  
Tubular Furnace ◽  
Temperature Range ◽  
Pollutant Discharge ◽  
Soybean Straw ◽  
Resource Shortage ◽  
Optimal Characteristic

In this study, an experiment is conducted to explore the potential to protect both the environment and resource shortage of soybean straw, for combustion in a tubular furnace. Then, the combustion characteristics, gas emissions, and energy consumption of soybean straw are analyzed at a combustion temperature range of 773–1173 K. The results show that the total emissions of CO and NOX are the largest at a temperature of 873 K. For NOX, the emission time is significantly improved at temperatures of 973–1173 K. At high temperatures, the reaction of NOX with CO and coke reduces the total emission of NOX. The average weight loss rate at combustion temperatures of 973, 1073, and 1173 K increased by 27.38%, 61.47% and 77.97%, respectively, relative to that of 873 K. However, the energy consumption increases with the increase in combustion temperature, resulting in unnecessary waste. To get an optimal characteristic between energy utilization and pollutant discharge, a temperature range of 873–973 K is determined as the appropriate temperature for burning soybean straw.

scholarly journals WHO IS AND SHOULD BE A SCIENCE TEACHER

2020 ◽  
Vol 19 (4) ◽  
pp. 520-522
Author(s):  
Martin Bilek
Keyword(s):  
Science Teacher ◽  
The State ◽  
Multiple Time ◽  
Apparent Discrepancy ◽  
Legal Documents ◽  
Main Activity ◽  
Optimal Characteristic ◽  
Two Alternatives

Who is and should be a Science teacher like? This seemingly multiple-time answered ques-tion, however, has not been clearly answered yet; moreover, in this case, a multi-alternative answer is required. Ideas of an optimal characteristic of Science teacher should be defined in context of their main activity. Two alternatives are under the focus; the apparent discrepancy which has been solved in some legal documents, and the state which is frequently not unambiguous in practice.

scholarly journals Detection of Wampee Damage based on Hyperspectral Imaging Technology

2020 ◽  
Vol 185 ◽  
pp. 03026
Author(s):  
Wen-Wu Qiu ◽  
Wei-Qiang Su ◽  
Zhao-Yan Cai ◽  
Long Dong ◽  
Chang-Bao Li ◽  
...  
Keyword(s):  
Hyperspectral Imaging ◽  
Southern China ◽  
Recognition Rate ◽  
Imaging Technology ◽  
Characteristic Wavelength ◽  
Thin Skin ◽  
Components Analysis ◽  
Pca Algorithm ◽  
Noise Fraction ◽  
Optimal Characteristic

Wampee is one of the characteristic fruits in southern China, and its brittle and thin skin can easily be damaged. In this study, principal components analysis (PCA) and minimum noise fraction (MNF) analysis were carried out on the two wampee varieties by hyperspectral imaging technology, and 680nm was determined to be the optimal characteristic wavelength. The accurate recognition rate obtained from PCA algorithm for wampee samples of two varieties was about 83.75%, and that obtained from MNF algorithm for two variety samples was 85%. It was indicated that the wampee damaged can be identified more accurately and effectively by MNF based on hyperspectral imaging technology

Photoelectric Characteristics of ZnO Nanowires Grown on AZO Thin Film

2013 ◽  
Vol 646 ◽  
pp. 51-54
Author(s):  
Su Hua Yang ◽  
Yi Ming Hsh ◽  
Li Hsiang Wang ◽  
Ming Yu Chang ◽  
Ting Jen Hsueh
Keyword(s):  
Weight Ratio ◽  
Field Enhancement ◽  
Green Emission ◽  
Emission Current Density ◽  
Zno Nanowires ◽  
Azo Thin Film ◽  
Field Emission Current ◽  
Maximum Field ◽  
Transport Method ◽  
Optimal Characteristic

The vapor transport method was used to grow ZnO nanowires on ZnO:Al (AZO) deposited silicon substrate. The optimal characteristic of ZnO nanowires was grown at 1100°C for 70 min, together with a ZnO/graphite weight ratio of 1:1 and N2/O2 flow ratio of 7:6. ZnO nanowires had a single crystalline structure and grew with a prefer direction in the (002) plane. Photoluminescence measurement showed that UV and visible green emission bands were observed. The turn-on electric field of ZnO nanowires was 0.11 V/μm and the maximum field emission current density was 1.8 mA/cm2. A high field enhancement factor of 1782 was evaluated.

The Research of Key Data Classification Optimal Mining Methods for Massive Data

2014 ◽  
Vol 989-994 ◽  
pp. 2001-2003
Author(s):  
Yin Ying Li ◽  
Yun Ze Wang
Keyword(s):  
Data Classification ◽  
Classification Performance ◽  
Classification Algorithm ◽  
Massive Data ◽  
Data Sets ◽  
Simulation Experiments ◽  
Cell Classification ◽  
Characteristic Points ◽  
Mining Methods ◽  
Optimal Characteristic

The data classification is an important issue in massive data classification. This paper proposes an inter-cell classification algorithm based on phase recombination neighbor points convergence which analyzes the convergence value weights of inter-cell characteristic points and filter the interferences of the minority local optimal characteristic points. The proposed algorithm can promote the convergence of the inter-cell classification data neighbor points. The simulation experiments testify the models by three types of actually collected data sets which illustrate the models have better classification performance.

Optimal characteristic nanosizes of mineral bridges in mollusk nacre

RSC Advances ◽  
2014 ◽  
Vol 4 (61) ◽  
pp. 32451-32456 ◽  
Author(s):  
Yue Shao ◽  
Hong-Ping Zhao ◽  
Xi-Qiao Feng
Keyword(s):  
Interfacial Strength ◽  
Optimal Characteristic

The nanosizes of mineral bridges linking neighboring platelets in various types of mollusk nacre dictate the optimal interfacial strength.

Analysis of Ecological of Characteristic Time for Thermoacoustic Refrigerator by Double Acoustic Drivers

2014 ◽  
Vol 684 ◽  
pp. 313-318
Author(s):  
Hao Chen ◽  
Feng Wu ◽  
Tuo Wang ◽  
Jie Lin
Keyword(s):  
Numerical Calculation ◽  
Objective Function ◽  
Characteristic Time ◽  
Finite Time Thermodynamics ◽  
Calculation Results ◽  
Objective Function Values ◽  
The Impact ◽  
The Relationship ◽  
Optimal Characteristic ◽  
Thermoacoustic Refrigerator

Using the method of finite time thermodynamics, and quoting the ecology objective function to optimize the performance of the dual sound source driven thermoacoustic refrigerator regenerator. And Use the characteristic time to characterize the transducer effect in the thermoacoustic system in order to seek the optimal relationship between the characteristic time and ecology objective function. Numerical calculation results show that the impact of the relationship between ecological function and the characteristic time is parabolic curve, so there is an optimal characteristic time to maximize ecological objective function values.

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