Applied Mechanics and Materials Vols. 239-240

Abstract: The Chinese materia medica is classified into several categories according to the major treatment function by experience in the traditional Chinese Medicine. This classification should have material basis. As the medicines have so many ingredients, it is hard to only use the chemical methods and biochemistry methods to analyze the Chinese materia medica. Near infrared spectroscopy is a nondestructive testing method and it can provide structural information of organic molecules which are the main effective components of the Chinese materia medica. We firstly get the NIR spectrum of some Chinese medicine, and then use LSA technology to process the data and cluster them. The result is quite coincident with the Chinese traditional medicine classification.

Abstract: According to the status of lacking fast detection technology to adulteration olive oil, the paper presented a new method based on near infrared spectroscopy technology and pattern recognition. 10 samples of pure olive oil were collected. 2 kinds of adulteration samples were respectively made up with soybean oil and rapeseed oil. The Identification models were build respectively by support vector machines and hierarchial clustering. The result showed that the model’s performance built by SVM was better than the model by hierarchial clustering. The recognition ratio and prediction ratio of SVM were 100%.The experiments shown that the fast detection technology based on NIR and pattern recognition had better feasibility and practicability in identifying adulteration olive oil.

Abstract: Information redundancy and complementarity are existing between the images obtained by multi-sensor, image fusion can improve the certainty and reliability of the information. Traditional method of image fusion based on multiresolution decomposition is susceptible to high frequency noise, fusion is often ineffective. A image fusion algorithm has been studied based on the wavelet multiresolution decomposition which is regional energy maximum for low-frequency decomposition image, and the bivariate statistical model for high-frequency part. The results show that: in the conditions of Daubechies 3 wavelet basis function, decomposition level 5 multiresolution decomposition, the bivariate statistical model for the high-frequency band is robust to noise based on the joint probability of wavelet coefficient pair - a wavelet coefficient and its parent; in the same time, the regional energy maximum for low-frequency band can be effective on the high-frequency band based on the bivariate statistical model. The fusion image has the biggish contrast, the preferable details, the higher gray level resolution.

Abstract: When putting a gas cylinder on the light path of a Michelson interferometer, the changes of the cylinder's gas pressure will make a difference to the optical path of the two beams of light, which finally changes the number of the interference fringes. Based on the principles above, a new method was forward a to measure gas's refractive index in this research. First, use a linear CCD (Charge Coupled Device) as photoelectric sensor to capture light signal, then, turn the electrical signal from photoelectric sensor into digital signal, which would later be transferred to microcomputer through USB interface. Finally, figure out the gas's refractive index in real-time using microcomputer.

Abstract: A straight-line trajectory tomography method, based on multiple tilted X-ray cone-beams formed by multiple sources and detectors, is investigated. In this method, multiple cone-beams are fixed and tilted at different positions and only the object translates along a straight-line trajectory. This kind of imaging method may have potential applications in industry testing and security inspections. As is known, projection data from a straight-line trajectory based on single cone-beam are incomplete and their reconstruction suffers from a limited-angle problem. The proposed straight-line trajectory tomography method based on multiple tilted X-ray cone-beams can be used to compensate these deficiencies. To reconstruct images, the filtered back-projection (FBP) reconstruction algorithm for the middle plane is first derived from the Fourier slice theorem. It is then extended to non-middle planes with the Feldkamp-Davis-Kress (FDK) approximation. Numerical simulations validate our method.

Abstract: the detection of the apple internal acidity using near infrared reflection spectroscopy is researched in this paper. This paper also elaborates the principle of partial least squares (PLS), and models spectral data by using the partial least squares method. Focuses on the comparison of the single points measurement and multiple points measurement in the Apple’s maximum diameter measurements, gets the following conclusions: a single point spectral scans can not accurately predict the internal acidity of the apple, the experimental precision of the multi-points measurement is higher then the single points measurement. The authors suggest that the measurement of average spectral values by multi-fiber optic probe should be used for the detection of the apple acidity.

Abstract: This study is aimed at exploring how the concept of dynamic routing of the router give light to the cooperative learning, and according to this, Free Choice Cooperative Learning was thus developed to tackle the learning results resulted from the problem of the optical fiber circuit measurement. The research taker adopted purposive sampling by using 15 students as the study object of a particular Technology Institute located on the South of Taiwan and employed two types of score sheets of the optical fiber circuit measurement to collect the pre-test and post-test school record respectively regarding how the case class learn from tackling with the problem of the optical fiber circuit measurement so as to benefit the research taker analyzing on the study result of the study object. And the study findings shows: (A) Free Choice Cooperative Learning achieved a prominent active study result regarding to how the students tackle the problem of the optical fiber circuit measurement; (B) the students of high-scoring and low-scoring group with the values of Free Choice Cooperative Learning show a study result that tackles with the problem of the optical fiber circuit measurement has not yet achieved a prominent divergence. To declare the Free Choice Cooperative Learning context that is endowed with active study result regarding to how to tackle the problem of the optical fiber circuit measurement and will not make any difference due to different values on Free Choice Cooperative Learning.

Abstract: This paper introduces a data processing and control module used for a millimeter-wave radiometer. The STM32F103ZET6 is chosen as an embedding control unit for real-time control and data acquisition and processing，and 8-inch touch LCD screen is used for display and input. The data processing and control unit in total-power radiometer with a Dicke-type switch are presented. The hardware structure and software flowchart are designed for this embedding system. The units effectively adjust physical temperature of the radiometer to acquire appropriate output in the radiometer system without inexpensive commercially available parts.

Abstract: A model for 3-D eddy currents analysis in orthotropic materials such as CFRPs is proposed. With artificial magnetic insulation boundary conditions, we solved a vector differential equation which describes the magnetic vector potential in the CFRPs materials with a delta coil near it using the method of separation of variables. As a result of the truncated region eigenfunction expansion method, a series solution was obtained, from which we got the eddy currents distribution. The distribution shows a good agreement with the work by others.

Abstract: Basis international electrician committee issued IEC61000-4-2 testing standards, proposed a new ESD current expression. Using Laplasse transform, established the ESD system mathematical model, according to the mathematical model, construction of passive four order ESD system circuit model and active four order ESD system circuit model, and simulation. The simulation results meet the IEC61000-4-2 standard, and verify the ESD current expression, the mathematical model and the circuit model of consistency.