Related Hardware Research Articles

소프트웨어 하드웨어 협동설계를 위한 통합모듈을 지원하는 제품자료모델

Since software and hardware integration has became a strategic tool for companies to innovate their products, an information system that can comprehensively manage software and hardware integrated product development is critical for the current product development. This paper proposed a product data model that can support modules of related software and hardware parts in Product Data Management(PDM) integrated with Software Configuration Management(SCM). The model allows engineers to define software and hardware product structure independently, and support the integration module that can summon related software and hardware parts to build a comprehensive module for collaboration. Through the integration module, engineers can identify and examine the effectiveness of their design alternatives to other related parts form different disciplines. The product data model was implemented as a prototype PDM system and tested with an example robotics product.

The multi-dataflow composer tool: generation of on-the-fly reconfigurable platforms

Dataflow specifications are suitable to describe both signal processing applications and the relative specialized hardware architectures, fostering the hardware---software development gap closure. They can be exploited for the development of automatic tools aimed at the integration of multiple applications on the same coarse-grained computational substrate. In this paper, the multi-dataflow composer (MDC) tool, a novel automatic platform builder exploiting dataflow specifications for the creation of run-time reconfigurable multi-application systems, is presented and evaluated. In order to prove the effectiveness of the adopted approach, a coprocessor for still image and video processing acceleration has been assembled and implemented on both FPGA and 90 nm ASIC technology. 60 % of savings for both area occupancy and power consumption can be achieved with the MDC generated coprocessor compared to an equivalent non-reconfigurable design, without performance losses. Thanks to the generality of high-level dataflow specification approach, this tool can be successfully applied in different application domains.

Technical nuances of temporal muscle dissection and reconstruction for the pterional keyhole craniotomy

The supraorbital keyhole approach offers a limited access for aneurysms located at the middle cerebral artery (MCA) bifurcation with long M(1) segments or proximal M(2) aneurysms. Alternative minimally invasive routes centered on the pterion have been developed to address these aneurysms. Appropriate dissection and reconstruction of the temporal muscle are important for optimal exposure and best cosmetic results with the pterional keyhole craniotomy. The authors describe the technical nuances of temporal muscle dissection and reconstruction adapted to the pterional keyhole craniotomy. After incising the scalp in a curvilinear fashion behind the hairline, an interfascial dissection is performed, allowing anterior reflection of the superficial temporal fat pat and superficial temporal fascia. The temporal muscle is incised 7-10 mm below its insertion at the superior temporal line. The deep temporal fascia and temporal muscle are incised vertically, completing a T-shaped incision. Subperiosteal dissection of both muscle flaps preserves the deep temporal arteries and nerves. A craniotomy measuring 2.5-3 cm in diameter, based anteriorly at the pterion, is made over the sylvian fissure. Dissection of the sylvian fissure and of MCA aneurysms can proceed without the use of retractors. The bone flap and associated hardware is entirely covered by the temporal muscle, which is reconstructed in 2 layers: the temporal muscle/deep temporal fascia and the superficial temporal fascia. This dissection technique prevents damage to branches of the facial nerve and minimizes temporal muscle damage. Dividing the temporal muscle vertically and reflecting both parts anteriorly and posteriorly prevents suboptimal illumination and visualization under the microscope. Covering the bone flap and related hardware with a multilayer anatomical reconstruction optimizes cosmetic results.

ICEFormat—the image cytometry experiment format

ICEFormat—the image cytometry experiment format

Design and Reliability Analysis of Image Type Head Gesture Interface in Distributed Control System

In this study, a novel method for head-controlled human-machine interface system is presented. The proposed system is composed of the image type head gesture interface and the distributed control system (DCS). In the head gesture interface, the frame grabber and CCD camera track the lighting pointer of double-source eyeglass frame. The computer programs with new algorithms locate the center-point of the head, transferring it to the screen coordinates, and then the user can control the cursor by head motions. The DCS with controlling commands and could be used for driving the relative hardware to assist the system more stably. The failure rate was obtained by testing in 60 days. The present system can provide an economical and effective method for reliability. It is also useful in the field of interface and technology.

Kernel Based Non-Iterative Automatic Fast Capacitance Compensation in Patch-Clamp Experiments

Patch-clamp recording is a widely used technique for studying ion channel functions and cellular responses. During patch-clamp experiments, the fast capacitance (CFast) transient is a detrimental artifact and must be eliminated with CFast compensation circuit. When applying the conventional computer-aided CFast compensation procedure, the patch-clamp amplifier faces the risk of saturation due to large square-wave responses, and compensation errors may be caused due to inherent disadvantages of iterative algorithm. Here, we introduce a novel non-iterative automatic CFast compensation method, namely K-method, based on kernel estimation with white noise excitation. The kernel was estimated with cross-correlation technique and captured dynamic properties of the CFast and its related hardware. To achieve the optimal settings of the CFast compensation, the kernel of CFast was fitted to two calibrated kernels indicating two distinct types of compensation effect: the “instantaneous” and “delay” effect. The fitted coefficients were used to adjust compensation circuit. White noise excitation significantly reduced the possibility of saturation, and the K-method suffered from no typical disadvantage of iterative method. We performed compensation experiments on a model circuit and HEK293 cells. The results demonstrated a good accuracy of the K-method and the membrane capacitance measurement could benefit from it.

Hybrid Intelligence Process Parameters Setting and Optimization on Differential Pressure Vacuum Casting

Considering that the problem of traditional process parameters setting in vacuum casting machine is of long period, high cost and inferior quality stability, a kind of hybrid intelligent decision model which combined with case-based reasoning, neural network and fuzzy reasoning were established. First, use the case-based reasoning technology to extract the similar case from the case database. Then, use the initial parameters to run the mould trial. Finally, use the fuzzy reasoning technology to optimize the initial parameters according to the product defects. Based on the above-mentioned intelligence model, the related hardware and software system was established. The actual practice proved that the system is effective and can be used in practical production.

Incorporating Information Security in Analysis of Business Strategy: A Conceptual Framework

The rise of Information Technology over the past decades has contributed to the increase of digital and electronic information processing greatly. As a result, information security has become a major strategic concern of firms and business strategy needs to incorporate information security deliberately. This study explores strategic implications of information security by conducting an empirical firm case study, an assessment of a national market and a more general industry analysis. The investigation is based upon concepts widely acknowledged in strategic management. The results argue the unambiguous necessity of incorporation of information security in the analysis of business strategy and suggest a number of strategic issues related to firm resources, market conditions and industry circumstances that are of essential meaning for strategy development. Some of these issues include privacy and anonymity, laws and regulations, natural risks and business continuity, informational assets and related knowledge, routines, software and hardware, trust and confident in e-markets, reputational advantage and buyer’s loyalty. A conceptual framework is established to synthesise the results of the investigation.

Underground Sensor Interaction Technique Based on DSP

In the underground data gathering and processing system, TMS320VC55X acquires signal and send it to display correctly on the LCD. The related hardware and software design of system is introduced in this paper. System adopts MzLH01-12864 display module with serial peripheral interface to realize graphic & text display. On the basis of the hardware interface circuit, SPI working mode of DSP multi-channel buffer serial port, software protocol and sequential flow are recommended. System realizes to display signal on LCD correctly, to demonstrate multiple menu of character and graphics and to implement the human-computer interaction.

Design of the Auto Electric Power Steering System Controller

The automobile electric steering system is a servo control system. This paper introduces the basic composition of the electric power steering system, and put forward the reasonable design solutions of the soft hardware and the correction methods of controller, given the main technology index of the controller. According to the performance requirements of cars steering system, make the relevant control strategy of the electric power steering system and through the design of related software and hardware to realize this control strategy and it can control each link of the automobile steering process. In order to verify the feasibility of t he control strategy, comparison experiments are carried out on a vehicle equipped with the developed EPS and the imported EPS, respectively. The results indicate that the developed EPS has similar performance with the imported one. The developed EPS not only works smoothly, but also has proper steering performance, thus can be equipped on passenger cars.

大面阵CMOS实时同步成像及显示系统的设计

In order to achieve real-time imaging and simultaneous display,a lary array CMOS camera system with simple structure and portable size is designed.Making use of EPF10K50,image timing of MT9M413C36STM,display timing of SXGA and multiplex of output data are designed.Image sensor data is divided into two way signals.One way data outputs for processor electric circuit to deal with,the other way data through ADV7127 video AD transformation outputs to display simultaneity in SXGA.The related hardware electric circuit is designed,and the device driver is written using the VHDL language.Under the development environment of the Quartus 8.0,it is debugged.Experimental results show that this system can stably work in 1 280×1 024@60 Hz line-by-line scan.

Research of Collision Probability and Teaching Platform for Wireless Network Transmission Interference Analysis

In wireless network communication system, the complexity of communication system makes it difficult in experimental teaching and studying transmission interference. As collision probability is an important factor in transmission interference, the model to compute collision probability is very necessary. In this paper, an algorithm is proposed in computing collision probability based on handoff model. Then, a related hardware and software platform is established for analyzing transmission interference in high speed railway system. In simulation, it proves that collision probability can be decreased if the time of sending packet is changed.

Improving vertical GPS precision with a GPS-over-fiber architecture and real-time relative delay calibration

A limitation of GPS positioning is that the vertical component is generally two to three times less precise than the horizontal components. In a previous work by R. Santerre of Laval University and G. Beutler of University of Bern, it was shown in simulations that it is possible to improve the GPS vertical positioning precision by using a multi-antenna GPS receiver and a precise calibration technique of the relative hardware delay between the antennas and the receiver. However, no actual implementation of the system was done to prove the concept until now. A new multi-antenna, GPS-over-fiber architecture with real-time delay monitoring, designed and implemented to improve the vertical precision is presented. The improvement in vertical precision arises from the elimination of the relative receiver clock error in single difference, between antennas, and the precision real-time calibration of the relative hardware delay. Experiments were conducted with a zero baseline and a short baseline configuration. The results show, as expected by the theory and the simulations, a two to three times improvement in the precision of the vertical component such that it reached the same level of performance as the horizontal components. These promising results will enable the use of this type of configuration in several applications where the same precision in all 3D components is essential and could not be achieved before with standard GPS positioning techniques.

Design of GPS Based on Single Chip Microcomputer

In order to go on a journey conveniently, the STC89C52 SCM is used, one kind of GPS user terminal is designed, it including GM-89 GPS module, communications and transformation connection, control processing electric circuit, display circuit, RS232 exterior serial communication connection and so on. The related hardware welding on the PCB, the software programming After-Burning writes in the SCM, inserts the TFT colored tablet (or 12864 liquid crystals) and outside sets at the type GPS antenna. On the electricity, demonstrated the longitude, latitude, time and altitude above sea level and so on information, after access the internet to consult the local latitude and longitude information to carry on compared to rightly, the result is correct, indicated that has achieved the design requirements.

Design of GPRS Based on MCU STC12C5A60S2

The MCU has the smaller volume, low cost, face control, antijamming ability strong and so on merits, GPRS is based on the GSM development foundation in data traffic. one kind of GPRS system Has been designed by using MCU STC12C5A60S2, it including correspondence transformation connection, SIM300 module, MCU, display circuit, keyboard electric circuit, RS232 exterior serial communication connection and so on. The related hardware welding on the PCB, the software programming after-burning writes in the MCU, inserts the liquid crystal display monitor and the SIM card, joins the receiver and the microphone, connects the good GPRS antenna. On the electricity, the establishment correspondence transformation connection, may realize the close-down, the dial and the answering telephone, transmits and receives the SMS, to receive and dispatch E-mail, carries on the Internet to glance over and so on, indicated that has achieved the design requirements.

Atomic force microscopy using optical pickup head to measure cantilever displacement

We constructed an optical pickup head atomic force microscope (OPH-AFM). The component used to monitor the displacement of the cantilever is made from the optical pickup head of a commercial DVD-ROM. In contrast to previous trials using an optical pickup head, this OPH-AFM provides a direct view of the cantilever and the sample. Therefore, the preliminary imaging process, including placing the laser beam on the cantilever and setting the initial scanning position over the sample, is straightforward. The OPH-AFM showed vertical resolution of below 20 nm, which is close to the maximum performance of the related hardware.

A rapid shape acquisition method by integrating user touching input

The easiness of creating three-dimensional (3D) models from physical objects is one of the core challenges that remain to be addressed in reverse engineering. In this paper, a touch-based 3D shape acquisition method is presented that is easy and intuitive to use. Based on the method, a user can easily interact with both real and virtual objects and directly generate feature-based CAD models. The key technical challenges associated with developing the related hardware and software systems are discussed. By using widely available consumer electronic devices, a low-cost prototype system is designed and built. Based on the designed system, a novel 3D coordinate computation method is developed to obtain the touching point positions. Related challenges on using such a system in generating 3D models are also discussed. Multiple examples are presented to illustrate the effectiveness and efficiency of the developed method.

STB Based Multimedia Information Publication System

The development of communication network has promoted the development of network multimedia. Nowadays, multimedia information can be displayed in various ways. Therefore, an efficient publication system is very necessary for users to distribute and display multimedia content fast and efficiently. To satisfy user's requirement, the set-top box (STB) based multimedia publication system is designed and implemented. The STB based system proposed in this paper adopted distributed B/S architecture, which is reasonably divided into five modules according to their own functions, consisting of information center, sharing database, time-sharing distribute engine, group controller and STB terminals. The performance and flexibility of this framework is very favorable. Its control logic is separated from physical time-sharing data transmission, in order to improve scalability and reliability. Data transmission is optimized to support a large number of terminals with special algorithms. Time-sharing engine is used to improve robustness of system when sources exceed the capacity of STB. Evaluation result shows that the system designed in this paper can provide high-quality information display services for terminal users with a relative low hardware cost. The kind of information publication system has been applied in retail stores, restaurants in Shanghai, Beijing and Nigeria.

Five-year experience of quality control for a 3D LSO-based whole-body PET scanner: Results and considerations

PET scanners require routine monitoring and quality control (QC) to ensure proper scanner performance. QC helps to ensure that PET equipment performs as specified by the manufacturer and that there have not been significant changes in the system response since acceptance. In this work we describe the maintenance history and we report on the results obtained from the PET system QC testing program over 5 years at two centers, both utilizing a Siemens Biograph 16 HiRez PET/CT system. QC testing programs were based on international standards and included the manufacturer’s daily QC, monthly uniformity and sensitivity, quarterly cross-calibration and annual resolution and image quality.For the Winnipeg and Novara sites, two and one PET detector blocks have been replaced, respectively. Neither system has had other significant PET system related hardware replacements. The manufacturer’s suggested daily QC was sensitive to detecting problems in the function of PET detector elements. The same test was not sensitive for detecting long term drifts in the systems: the Novara system observed a significant deterioration over five years of testing in the sensitivity which exhibited a decrease of 16% as compared to its initial value measured at system installation. The measure of the energy spectrum, showed that the 511keV photopeak had shifted to a position of 468keV. This shift was corrected by having service personnel perform a complete system calibration and detector block setup.We recommend including tests of system energy response and of sensitivity as part of a QC program since they can provide useful information on the actual performance of the scanner. A modification of the daily QC test by the manufacturer is suggested to monitor the long term stability of the system. Image quality and spatial resolution tests have proven to be of limited value for monitoring the system over time.

Grid Information Security Functional Requirement Fulfilling Information Security of a Smart Grid System

This paper describes the background of smart information infrastructure and the needs for smart grid information security. It introduces the conceptual analysis to the methodology with the application of hermeneutic circle and information security functional requirement identification. Information security for the grid market cover matters includes automation and communications industry that affects the operation of electric power systems and the functioning of the utilities that manage them and its awareness of this information infrastructure has become critical to the reliability of the power system. Community benefits from of cost savings, flexibility and deployment along with the establishment of wireless communications. However, concern revolves around the security protections for easily accessible devices such as the smart meter and the related communications hardware. On the other hand, the changing points between traditional versus smart grid networking trend and the information security importance on the communication field reflects the criticality of grid information security functional requirement identification. The goal of this paper is to identify the functional requirement and relate its significance addresses to the consumer requirement of an information security of a smart grid. Vulnerabilities may bring forth possibility for an attacker to penetrate a network, make headway admission to control software, alter it to load conditions that destabilize the grid in unpredictable ways. Focusing on the grid information security functional requirement is stepping ahead in developing consumer trust and satisfaction toward smart grid completeness.