Obtaining Biology Information With Digital Image Processing And Computational Electromagnetics

Many kinds of advanced technology are serving biology as it is developing so fast. In this article, digital image processing, electromagnetic theory, computer version and computational electromagnetics were applied in getting the biology information.Mitten crab is a kind of rare aq(?)tic products which live in China, and many people favor it as it is very delicious. But the increasing of neoteny ratio restricts benefit improving, so how to control neoteny ratio is a problem which need solved now. Many researchers study it with biochemistry, but with little physics knowledge, so the problem is still very fearful. To find the best way to solve the problem, the author refers to a lot of correlative literature. And the author dealt the young crab with little dose neutron in proper time with experts working in Jiangsu Academy of Agricultural Sciences. In this article, the author used digital image processing technology to distinguish neoteny crab impersonally. With the perfect way applied in, the numbers and size and the color character was got from the crab image, conquering interfere of the weather and the bead (?) carapace and the feet. The program gives us an impersonal standard of differentiating the neoteny crab.Electromagnetic theory is being applied in many fields, such as geography, geology, biology, material science and information science. Computational electromagnetics is an application subject which bases on electromagnetic theory, resorts to great capability computers, applies the arithmetic of computational mathematics, solves complex electromagnetic theory and engineering problem. Finite-Difference Time-Domain Method(FDTD) is one of mature methods simulating electromagnetism. But traditional FDTD still has some disadvantages, the first, to minish numerical disperse comes from approximate difference, the size of the space cell must be far shorter than wavelength, and to satisfy Courant condition, the time cell must depends on shortest space cell. This limits the range of its application. Alternating-Direction Implicit Finite-Difference Time-Domain Method (ADI-FDTD) is a method which can let the time cell needn't depend on shortest space cell. In the article, the author gave the difference expressions and the especial solution to connective boundary, near-to-far transformation of FDTD, stability of ADI-FDTD. The result of simulating scatter on metal square columniation validated the veracity and validity of ADI-FDTD. At last, ADI-FDTD was applied in simulating the leg radiated with 800MHz electromagnetic wave. Modulus and phase of electric field was simulated.