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Medical image segmentation has been a hot spot in recent years. And the segmentation of brain vessels image becomes a key-problem due to its complicated structure and small proportion. In this paper, the brain MRI images are processed with statistical analysis technology, and then the accuracy of segmentation is improved by the random assortment iteration .First the MIP algorithm is applied to decrease...
The connection between managerial turnover and switching costs is studied within a model under conditions of declining performance. Utilizing the online decision theory, this paper characterizes optimal managerial turnover policies as a function of the time series properties of performance measure and switching costs. When the owner of an enterprise, e.g. stockholder, is risk aversion, we provide...
It is of great significance for us to research security problems in the power system. After choosing static security, related theories and methods to be main research object, we calculate power flow and use transferring load as safety countermeasures for power restoration at the same time. Here, we select the Newton method. Then, making the static analysis module of PSASP as the electric power system...
This paper took the check of rupturing capacity circuit breaker in petrochemical electric power network for example. It introduced the selection rule of largest short-circuit current which flow through circuit breaker, the principle of short circuit calculation, the equivalent model of external system, the modeling of mathematical model of industrial electric owned power network, and the procedures...
Structural features has been analysed after the third part of SINOPEC Tianjin company's power system been put into operation. Node voltage been treated as the constraint, minimum power loss been treated as the objective function, used PSASP to calculated the different way of generator's combination, the voltage , power flow, power loss has been compared before and after the OPF calculation. The conclusion...
The ever growing demand for wireless services has placed enormous burden on valuable resources such as spectral bandwidth. Cognitive Radio (CR) with dynamic access is becoming the main trend of the next generation wireless communication system as it can greatly increase the efficiency of spectrum utilization. OFDM, which can allocate spectrum resource conveniently, is the main modulation scheme of...
Hidden identity-based signatures (abbreviated as Hidden-IBS) can be seen as a variant of the traditional notion of group signatures. Compared with group signature schemes, Hidden-IBS is more attractive in the application of identity-management systems and anonymous credential systems. In Financial Cryptography 2007, Kiayias and Zhou firstly proposed the Hidden-IBS from bilinear pairings. Unfortunately,...
This paper focuses on the wheel loader steer by wire system. For the reasons of the feature of the big variation range of steering resistance and the input flow, the serious non-linear, using the hybrid-fuzzy controller which combining the conventional PID and fuzzy controller together. This paper introduces the structure of steer by wire system, mathematical model of the system, the design process...
Boolean Satisfiability (SAT) algorithms have seen dramatic improvements over recent years, allowing larger problem instances to be solved in application domains such as automatic test pattern generation (ATPG) that can also be viewed as solving a SAT problem. The key to a SAT-solver can be scalable is that it is able to take into account the information of high-level structure of formulas. This paper...
An experimental set-up for the spectroscopic study of Laser-Induced Air Plasma (LIAP) was built. The temporal evolvement, energy density and radiation intensity spatial distribution of emitted light at 1064 nm of laser plasma were respectively detected. It presents a relatively clear physical image of LIAP. The measurement result demonstrates that there is a comparatively strong radiation spectrum...
As a protection and authentication technology, digital watermarking technology has been used in the medical image field. In this paper, a digital watermarking algorithm is proposed based on integer wavelet transform to protect digital medical images and estimate its integrity and authenticity. Using matrix norm quantization, watermarks are embedded into low-frequency, medium-frequency and high-frequency...
A strain which was good at removing nitrogen-ammonium was isolated from the contaminated soil from refuse transfer station. Under the laboratory conditions, the strains of ammonia-N, nitrite-N, nitrate-N and the different effects of pH, temperature impact on the denitrification were tested. Experimental results show that it will have a high ammonia-nitrogen removal rate when pH is 4 to 7. The optimal...
Hypoglycemic and Hypolipidemic activity of saponins in cinnamon on diabetic mice was studied. Methods: The diabetic mice were established by alloxan. Then the living diabetic mice were divided into six groups. Among them, three groups were treated with cinnamon total saponins 100, 200, 400mg/kg.bw by ig adminstration, and one group was given Xiaoke Pill 300mg/kg.bw by ig adminstration as positive...
Surface deformation of goaf is a complex non-linear process, which has a hidden, complexity, and long-term features. Before building the life or service facilities in the goaf, we must have evaluated the stability and residual. In this paper, a new idea was put forward for stability analysis and evaluation of goaf by multi-scale decomposition using EMD(Empirical Mode Decomposition) method. Case study...
How to estimate the value of a scientific paper is a common requirement, when we facing so many retrieved scientific papers. This paper provides a method named PaperRank for ranking scientific papers based on Google's PageRank, which considers those factors reflecting the reading value of the papers such as content, journal, author, published time etc. The method of ranking papers also can be seen...
The production of the regret theory and the influence on decision-making were analyzed. The concept of relative regret and absolute regret of satellite town's traveler were defined, and the expressions correspond to the relative regret and absolute regret also was defined. The relative regret was introduced to the Logit model of travel choice, and was computed by an example. The paper believed that...
We developed the acetabular tridimensional memory alloy-fixation system (ATMFS), which is made of NiTi shape memory alloy, according to the specific mechanical properties of biological memory material, nitinol alloy and measured distribution of contact area and pressure between the acetabulum and the femoral head of cadaveric pelvis.Six formalin-preserved cadaveric pelvis were used for this investigation...
When evaluating the performance of a batch of Inertial Measurement Unit (IMU) and encountering abnormal samples, the current method was uneasy to retain the stabilization of evaluating results. In the case, a method based on median theory is presented in the paper. Theory analysis and example results show that the median method overcomes the shortages of the current method effectively. Additionally,...
Several different control algorithms for high-order inertial system were researched recently in China. Since different algorithms have similar effects, the consistency of these algorithms was first proposed in this paper in the view of control principle. The superheated steam temperature system of a 600 MW unit was taken as an object. The characteristics of time domain and frequency domain, spectrum...
This paper presents the truck crane boom system working principle, establishes key components model in accordance with their actual structure using Hydraulic Component Design Library, and builds the boom system model with AMESim. Based on the validated model by experiment results, the factors are found out for the boom accelerating, and the improvement measure is proposed.
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