Papers by Keyword: Resolution

Abstract: The geochemical analysis of the middle Z precious metallic trace elements of the charnockite mineral composition was obtained by using proton induced X-ray emission at 3 MeV with a Si (Li) detector. Compared with other experimental nuclear analytical techniques like EPMA, XRF, and NAA, proton induced X-ray emission is used to detect with good accuracy and precision in the case of trace precious metals like Mo, Nb, Ru, Rh, and Ag, etc., in charnockite mineral composition due to the cross-sections with 3 MeV protons and good agreement. But peak resolution problems of K-X-rays of low Z and L-X-rays of the above elements which were presented in charnockite analysis must be solved and also change the detector parameters to obtain exact values in traces of the above elements in parts per million.

Abstract: It is well known that electron beam lithography is one of the potential candidates to fulfill of the demand of the miniaturization of the design rule of semiconductor integrated circuits beyond sub 100nm size with high reproducibility. It is also a fact that the resolution is recognized to depend on the various factors which are oriented to the machine and process conditions, for example, electron beam diameter, the intensity distribution of the beam itself, the resistance properties polymers, the development conditions, etc. Therefore, it is thought that it is impossible to be derivable directly and unambiguously from the resist material itself. In this study, the intrinsic resolution of the resist polymer was discussed based on the hypothesis that the resolution itself may be able to improve to the same size as the size of an electron beam profile, or less. The bi-layer structure ZEP520A/poly methyl glutar imide (PMGI) was proposed and tested. As for the results achieved, the contrast γ was improved constantly with a reduction in the development time and a decrease in the development temperature. The highest γ value, approximately 18, was obtained during development at the-20°C condition. An approximately 70nm with high aspect ratio pattern which is almost the same size of the beam pattern was obtained. This result provides an understanding how the intrinsic resolution of the resist material should be, and can be applied to other lithography methods. This process was applied to the actual electrode pattern making process. An approximately 100nm width of Copper nanowire as the gate electrode for the AlGaN/GaN HFET was successfully demonstrated. In addition, AlGaN/GaN HFET operated at about 73.5GHz, successfully.

Abstract: The paper carried out a research on the dark fiber shape and genetic mechanism of the acidic fiber imaging bundle. The Dirac delta function is firstly used to analyze the probability distribution variety of the dark silk. The experimental results for the detection of the scanning electron microscope (SEM) and resolution show that the genetic ratio of the dark fiber is proportionate to length of the bundle and inversely proportional to the monofilament diameter. However, the monofilament diameter should be decreased to increase the resolution. The technique and the structure should be improved to meet the requirements of both high resolution and low dark silk rate. Therefore, solutions and effective measurements for reducing even if avoiding the dark silk are proposed in the paper. The research will guide the preparation and application of the high-resolution fiber imaging bundle.

Abstract: A method of minimum resolution adjustment based on the control of PWM is proposed. In the first part, the principle of PIC16F877 is analyzed and the signal period and the pulse width is calculated. the Two buttons on PIC16F877 are used to precise control the increment and decrement of output of PWM. The procedure of control of PWM is introduced at the last part. Using the method, the speed of rotation of the direct current motor can be precise controlled.

Abstract: This paper presents capacitive sensor interface with very good stability, small thermal drift and high resolution. The measurement principle is based on a charge amplification and multi-slope conversion which utilizes stable resistors as reference components. Five capacitance ranges from 5 pF to 100 pF can be selected. Based on previous works, a so-called "zoom-in" technique is implemented for sensors with small variation of their capacitance, thus significantly extending the signal-to-noise ratio. The conversion time can be less than 100 μs, the temperature stability with offset cancellation is 2 ppm/K, and the dynamic range using "zoom-in" is 18.5 bits. The 1/f noise corner of the converter with noise floor of 0.1 fF is 20 mHz which indicates very good long-term stability. These characteristics make the interface suitable solution for wide range of industrial and scientific applications, including positioning systems and transfer of length standards with sub-nanometer accuracy.

Abstract: In this contribution are designed complex methods of image processing as (binarization image, tresholding, edge detection) with specific method selection, which is used in the camera system of assembly process. The contribution proffers of problems resolution, which are present by assembly components scanning. These components are assembled in the system ICIM. This system is situated at the Institute of Production systems and Applied Mechanics. Assembly configuration, which is assembled in this system consists from for elements. The contribution describes mathematical function of digital image by scanning of assembly components.

Abstract: Two relatively high concentration 4% and 6% the replaceable Linear polyacrylamide (LPA) gel was used as the sieving medium. An extensive series of experiments has been performed using DNA fragments ranging in size from 80 to 587 base pairs; the properties such as the mobilities, the width at half height, and the resolution were compared. The electric field was changed from 100V/cm to 375V/cm. From the experiment results, it is shown: increasing the gel concentration from 4%LPA to 6%LPA can not improve the resolution to separate the DNA sample (the length of fragments600bp). This work complements our systematic study and will help to further optimize and improve high performance DNA separation in microfluidic applications.

Abstract: The principles of using computer parallel calculation method carries out in-depth analysis and research for computer art photography virtual imaging technology, and carries out image processing experiments for the artistic image rendering, we can get better art photography image processing effect. Combined with photography image virtual image mathematical model, this paper designs a computer program of photography image art rendering, and carries out art rendering for a landscape painting, we can get ideal art modification effect. Finally, this paper begins to calculated results for the parallel computing of art photography rendering, the calculation is found that the parallel computing is less time-consuming than general algorithm and with the increase of pixel time-consuming increased gently, it doesnt appear large fluctuations. For an image of the same resolution to carry on data processing, the general algorithm takes 55 seconds to complete the task. For parallel computing, it needs to3 seconds to complete, greatly saving time and computer resources, and providing the theory reference for the development of artistic photographys virtual image technology

Abstract: The paper introduces a new low-cost temperature measurement solution. CTMU module is available in many Microchip microcontrollers.The method is to use the CTMU of microcontroller and a diode to replace the higher cost thermostat or temperature sensor.

Abstract: The surface morphology of the Al₂O₃ powder was observed by SEM and the composition content was analyzed by EDS spectrum under different vacuum level condition. The effects of the atmosphere pressure on the SEM image quality and EDS analysis were explored systematically. The platinum sputtering treatment on the materials surface in high vacuum mode is beneficial to the observation of the images but has negtive effects on the analysis of O and Al elements. The decrease of vacuum degree in low vacuum mode can result in the drop of the image resolution and EDS spectrum accuracy. However, clear SEM image and EDS composition analysis result near to the real element kinds and contents of sample can be obtained in the low vacuum mode of 1Pa~50Pa.