Huanzhong Gu

North Dakota State University | NDSU · Department of Psychology

The NDSU Center for Visual and Cognitive Neuroscience (COBRE P20 GM103505-08) is dedicated to the conduct of basic and translational research seeking to understand the neural bases of normal and disordered human sensation, perception, cognition, emotion, and action. The research of four Primary Project Directors, five Pilot Project Directors, and n...

Facilitating non-contact measurement, a computer-imaging system was devised and evaluated to predict the chlorophyll content in potato leaves. A charge-coupled device (CCD) camera paired with two optical filters and light chamber was used to acquire green (550 ± 40 nm) and red band (700 ± 40 nm) images from the same leaf. Potato leaves from 15 plan...

Parietal neuronal populations have been found which respond bimodally to visual and somatosensory input regarding one's own limbs or even perceived haptic input of a false limb (Graziano et al., Science 290:1782-1785, 2000). Further, neuronal populations have been observed which respond preferentially to visual stimuli presented in spatial congruen...

A custom-built metal oxide-based olfactory sensing system was used to analyze the headspace from beef strip loins (M.Longissimus lumborum) stored at 4 °C and 10 °C. Area-based features were extracted from the raw signals using various signal processing techniques. Classification models using radial basis function neural networks were developed usin...

Uniform fungicide application on cereal grain heads is important to control Fusarium head blight. The spray application must cover the entire head to be most effective. Qualitative and quantitative techniques are often used to define spray deposition. Three techniques were evaluated to measure fungicide deposition on cereal grain heads. A fluoresce...

A metal oxide sensor-based electronic nose system consisting of nine sensors was designed and used to analyze the volatile compounds emanating from beef strip loins (M. Longisimmus lumborum) stored at 4 °C and 10 °C. Two statistical techniques, i.e., linear discriminant analysis (LDA) and quadratic discriminant analysis (QDA) were used to develop c...

A commercially available Cyranose-320™ conducting polymer-based electronic nose system was used to analyse the headspace from fresh beef strip loins (M. Longissimus lumborum) stored at 4° and 10°C. The raw signals obtained from the electronic nose system were pre-processed by various signal-processing techniques to extract area-based features. Prin...

Oat kernel size distributions are important to the oat milling industry because size separation of kernels is routine in oat milling. Dehuller rotor speeds are set in order to deliver the optimal mechanical stress to different kernel size streams for dehulling. In this study, size distributions were evaluated by digital image analysis in 10 cultiva...

A commercially available Cyranose-320 ™ conducting polymer-based electronic nose system was used to analyze the volatile organic compounds emanating from fresh beef strip loins (M. Longisimmus lumborum) stored at 4°C and 10°C. Two statistical techniques, i.e., linear discriminant analysis (LDA) and quadratic discriminant analysis (QDA), were used t...

Oat (Avena sativa L.) kernel size uniformity is important to the oat milling industry because oat-processing mills separate oats according to size to optimize dehulling efficiency. In this study, we compared two different approaches for analyzing oat kernel size uniformity, namely the sequential sieving of oat samples with a gradient of slotted sie...

Two laboratory−based multispectral imaging systems were developed. The image features from color (red, green, and blue) and multispectral bands (550, 710, and 810 nm) were evaluated in predicting chlorophyll and nitrate contents of potato leaves grown in the greenhouse. Histogram−based image features were extracted from normalized ‘r’ and ‘g’ and m...

Test weight is one of the most important characteristics for evaluating grain quality in oats. This study evaluated the role of oat kernel size and size distributions on test weight. Oat kernel size was measured from digital image analysis, sequential sieving and mean kernel mass of original oat samples and their different size fractions. Data from...

A method using gas chromatography-mass spectrometry (GC-MS) with headspace solid-phase microextraction (SPME) was developed for the study of raw beef storage under two different temperatures (10oC and 4oC) in refrigerators. The headspace volatiles were extracted by 75-¦Ìm Carboxen-Polydimethylsiloxane (CAR/PDMS) fibers in a home-made extraction cha...

Foodborne illness is a significant problem of current focus. Electronic nose, or artificial nose, technology is a promising non-destructive evaluation tool for food quality assessment. Mixed metal oxide detector-based electronic nose system was developed and fabricated. Customized electronics were developed to operate detectors at different operati...

This paper provides an overview of the development of prototype of electronic nose system using metal oxide detectors. Experiments were conducted to identify and discriminate the variations of meat quality due to different storage conditions using response of specific (H2S and methane) sensors. Acquired sensors responses were further processed and...

A portable, walking type multi-spectral sensing system was developed and evaluated to predict chlorophyll content of potato leaves. The sensor consisted of a micro-spectrometer (MicroPacTMCS600), handle, and whole system mounted on plexiglas assembly. Preliminary test was conducted on 37 randomly selected leaf-canopies. Signal processing algorithm...

A laboratory scale multispectral imaging system was evaluated to observe the effectiveness of the color imaging technique in predicting chlorophyll and nitrate content of potato plants grown in the field. The experiment was laid in a randomized block design with 17 treatments consisting of five levels of nitrogen (0, 68,136.11, 200.52, 267.36 kg/ha...

This paper describes the development and evaluation of laboratory based multi-spectral imaging system. The overall goal of this research to compare the effectiveness of color (RGB) and multi-band (550 nm, 710 nm and 810 nm) imaging systems in predicting chlorophyll and nitrate content of potato leaves. Histogram based image features were extracted...

This paper describes a computer-imaging based spray coverage evaluation system used for determining fungicide coverage in wheat & barley. Six different image segmentation techniques used for determination of spray coverage has been discussed in details along with their performances. Combination of two of the segmentation techniques has provided the...

This paper describes the intricacies of estimation of a software development project using COCOMO II estimation/planning software. This COCOMO II estimation software is used to estimate the effort and schedule required to develop performance-monitoring software for a company. This performance monitoring software utilizes the centralized, integrated...

Typescript. Thesis (M.S.)--North Dakota State University, 2000. Abstract: leaf iii. Includes bibliographical references.