ECG Information Management System of Virtual ECG Instrument

ECG is an important method in clinical heart disease diagnosis. The storing of lots of ECG and other corresponding materials in information management system has great value to medical researcher for their reference and research. Embedding the ECG information management system to virtual ECG instrument is not only enhanced the operating value but also increased the functions to virtual ECG instrument. The model of relation database and ActiveX Data Object (ADO) of VC++6.0 is used in the system. The key functions of Storing,Query,Deleting and core modules are introduced.     

Development of High-speed Rectangle Burner Used in Baked Aluminum Reduction Cells

Bake out of Aluminum reduction cells will affect the normal production and the ultimate life of reduction cell directly. The method of thermal bake out is a key of novel technology which possesses such advantages as well distributed temperature, easy control for the speed of heating up, fully baking for the joint and ramming paste of the edge. The design of the burner is a key technology of thermal bake out. A new high speed rectangle burner has been developed based on the experiment, and the structure of this burner has also been optimized. The new burner an fire easily, burn stably and fully, and has high ratio of load adjustment, and low noise, etc.. It can meet the needs of thermal bake out reduction cells. Its development can provide the technological guarantee for the use of thermal bake out Aluminum reduction cells.     

Algorithm of Cutter Machining Position during Numerical Controlled Last Carving

Numerical control last making machine is a machine that is used to process shoe last. A new principle of numerical control machining shoe last is put forward aiming at the deficiency of current carving last system. On the basis of the principle, the algorithm of cutter machining position during numerical controlled carving last is analyzed in detail. The complex problem of the calculation of cutter machining positiion is resolved by applying spherical milling cutter that is often used in machining free_curve surface today and taking account of practical situation of the shoe last_making machine. At the same time, the calculation of cutter machining position is realized by program using Visual C++6.0. As a result, the calculation time of cutter machining position is reduced greatly and the efficiency of design is improved. Moreover, the process of carving last is agile and precision of carving last is ensured.     

Influence of Hydrogen on Impact strength and Microstrcture of the Titanium Alloy Ti-Al-V

Absract:After analyzed and tested the composition, microstructure and the mechanical property for the forging timber of the titanium alloy Ti-Al-V, Processed it into lash test samples , and made the samples having different hydrgen-content by the way of artificial hydrogen-absorption. Next, measured the impact strength vaules(ak ) of the titanium alloy in different hydrogen-content, and drawn the relation curve between the impact strength and the hydrogen-content. Afertwards,four samples and themselves impact fractographies whose hydrogen-contents are 48ppm,137ppm, 361ppm and 666ppm have been used for phases and the sweep electorn microscopes,Known microstructures and shapes of the hydrogenate of the different hydrogen-content tianium alloy and that the hydrogenate is sheet and its distribution in the titanium alloy.     

Image Secure Communication Based on Logistic Map

The chaotic sequences generated by logistic map are used as the carrier, and the image secure communication scheme is proposed based on that the sequences possess a good correlation property. Promising results are obtained on Lenna image by computer simulation. The obtained results indicate that the transmitted source image can be correctly recovered and the proposed scheme is reliable when transmitter and receiver using identical initial value even under the situations of a noisy channel. However, the tiny difference of initial value between transmitter and receiver will result in failure to communication. Finally, the quality of recovered source image is assessed, and the approximate formula of bit-error rate in term of code length is also obtained.     

Two-dimension Opto-electronic Test Method to Determine the Cancellous Bone Porosity

A two dimension opto electronic test method has been developed to determine the distribution characteristics of cancellous bone porosity. The fresh pig tibiae concellous bone in behind leg was sectioned. A total of 36 cancellous bone sections were divided two groups. The first group consisted of 18 transversal sections along the axial direction, and the second group consisted of 18 axial sections along the transversal direction of the tibiae. Their images were examined microscopically and processed quantitatively. The total area, solid matrix area and pore area of each specimen and its porosity were determined, too. The cancellous bone porosity is gradually decreased along the axial direction of tibiae and approaching to the compact bone, but almost constant along the transversal direction. Cancellous bone is modeled as a transversely isotropic, liquid saturated porous solid. The two dimension opto electronic test method can be used to relatively accurately determine the distribution characteristics of the cancellous bone porosity from different directions if the cancellous bone sections are enough.     

Health Record Management System in Visual Electroencephalograph

Visual Electroencephalograph (VEEG) is a new type of digital, information electroencephalograph. As an important part of Visual Electroencephalograph, Health Record Management System(HRMS)is integrant to store electroencephalographic data plentifully, show and edit their waveforms, analyze the data on line or off line. By the most popular and steady Relational-Database technology, ADO Application Programming Interface (API) and Visual C++ programming tool, the system has the friendly interactive interface and the functions of adding, updating, deleting, recalling, counting health record information, etc. Integrated with other parts of VEEG, HRMS ameliorates traditional EEG and overcomes some disadvantages of it such as discommodious to record, difficult to read and hard to get useful information. This paper introduces main functions, structure design and components of Health Record Management System.