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Permanent magnet synchronous machines (PMSMs) equipped with dual three-phase (DTP) fractional-slot overlapping windings (FSOWs) are characterized by stator modularization, low rotor losses and easy manufacturing. However, the overlapping between the adjacent phase windings may cause poor magnetic insulation in PMSMs, which is undesirable in fault-tolerant applications. This paper proposes a type of...
A novel axial flux permanent magnet eddy-current coupling (PMECC) employing a new magnetic field adjustment (MFA) method is proposed in this paper. The structural feature and operation principle of the novel PMECC are illustrated. The magnetic equivalent circuit (MEC) model is built in this paper to analyze its electromagnetic characteristics efficiently. For improving the torque capability, the structure...
Ia this paper, a Halbach arc linear permanent magnet machine (ALPMM) for large telescope application is analyzed by finite element method. The ALPMM consists of one rotor and three segmental stators in which the stator core and windings are characterized by “C” shape. A 3-D air-gap, which can significantly increase the torque density, is formed between the C-shape stator and the rotor. The key electromagnetic...
A 3D analytical model is developed for the computation of the no-load magnetic field distribution in flux reversal linear-rotary permanent magnet actuator (FR-LRPMA) with two PM poles (PM_pole) and two ferromagnetic poles (Fe_pole) on each stator tooth. Then a 3D model for calculating the air-gap permeance is presented considering the effect of stator slot and the permeance difference of Fe_pole and...
In this paper, a novel variable-mode partitioned stator switched flux memory machine (PS-SFMM) with spoke-type low coercive force (LCF) permanent magnets (PMs) is developed. Due to the changeable magnetization level and polarity of LCF PMs, the PM pole number within inner stator can be purposely varied to either 12 or 6. Thus, this pole-changing concept enables PS-SFMM to behave similarly as 12-pole...
This paper proposes a new pole-changing memory machine (PCMM), which tactfully incorporates fractional pole-slot combination and pole-changing with memory machine. By doubling the slot number and coil span of fractional slot concentrated winding (FSCW), the machine having 9 slots 8/4 pole (9s-8/4p) combination can be changed into the one having 18 slots 8/4 pole (18s-8/4p) with 2 pitches. The electromagnetic...
A novel multi-pulses technology with unequal space to enhance SNR of pulse laser radar is proposed in this letter. Traditional multi-pulses technology employing equal spaces multi-pulses always leads to many outputs once the time window has pulses no matter the number of pulses, which is difficult to identify which one is the main pulse we want to get. Thus we propose a method using unequal spaces...
Shared last level cache has been widely used in modern multicore processors. However, uncontrolled cache sharing on multicore leads to more serious cache pollution than that on single-core processor. A process with weak locality can evict strong locality data sets that belong to other concurrent ones. Processes in multiprocessing environment always affect each other on multicore systems with shared...
As data prefetching is used in embedded processors, it is crucial to reduce the wasted energy for improving the energy efficiency. In this paper, we propose an adaptive prefetch filtering (APF) mechanism to reduce the wasted bandwidth and energy as well as the cache pollution caused by useless prefetches. APF records the prefetch-victim address pairs of issued prefetches and collects information about...
Conventional superscalar processors usually contain large CAM-based LSQ (load/store queue) with poor scalability and high energy consumption. Recently proposals only focus on improving the LSQ scalability to increase the in-flight instruction capacity, but with poor performance improvement and energy efficiency. This paper presents a novel speculative store-load forwarding mechanism, named SOLE (speculative...
Energy efficiency is becoming a major constraint in processor designs. Every component of the processor should be reconsidered to reduce wasted energy and area. Prefetching is an important technique for tolerating memory latency. Prefetcher designs have important impact on the energy efficiency of the memory hierarchy. Stride prefetchers require little storage, but cannot handle irregular access patterns...
Motion trajectory description plays an important role in motion recognition for many robotic tasks. The previous methods are too high in computational cost for real time recognition. In this paper, we propose a novel indexing method for motion trajectories as a high level descriptor for real time 3D motion recognition. Trajectories are segmented into basic segments and represented in segment level...
Motion trajectory description plays an important role in motion recognition for many robotic tasks. The previous methods are too high in computational cost for real time recognition. In this paper, we propose a novel indexing method for motion trajectories as a high level invariant descriptor. Trajectories are segmented into basic segments and represented in segment level rather than point level....
Motion trajectory description plays an important role in motion recognition for many robotic tasks. The previous methods are too high in computational cost for real time recognition. In this paper, we propose a novel indexing method for motion trajectories as a high level invariant descriptor. Trajectories are segmented into basic segments and represented in segment level rather than point level....
For the needs of the rehabilitation training of lower limbs, a wire-driven aid-walking robot is proposed, and the kinematic research is done in this paper. This aid-walking robot is designed according to the skeletal structure of lower limbs of the normal person. After this, the kinematic model of this system is built based on D-H method. By this model, the relationship between the length of wires...
Brand attitude always is one of most important factors influencing consumer behavior. This paper would focus on the effect of brand attitude on the brand buying intention. The results show that the brand attitude can moderate the relative importance of purchasing intention determinants. Detailedly, when consumers own positive brand attitude, the purchase attitude is more important; whereas when consumers...
Motion perception and recognition by trajectory are important for motion analysis. A flexible and adaptable descriptor of motion trajectory plays important role in the performance of perception and recognition. Motion trajectories usually use raw data for many tasks, which is not effective. Shape descriptors and signature of differential invariants are good for local features but global feature is...
The knowledge-sharing in university research and innovation teams is a systematic process. Under particular environment, the process between the input of original knowledge and the output of new knowledge is an organic system in which individual explicit knowledge, individual tacit knowledge, team explicit knowledge and team tacit knowledge intersect and exchange with each other.
The operation of medical insurance in Dalian has been stable since the implement of "Dalian Urban Employee Basic Medical Insurance Measure". However, some problems, such as huge fund cash surplus and incomplete covering, still exist. The purpose of this paper is to establish the predictive model of balance between income and expenditure of medical insurance fund, whose factors are policy...
An efficient and accurate performance analysis technique is indispensable for developing on-chip communication architectures. However, traditional approaches cannot achieve both efficiency and accuracy. To address this problem, we present a FPGA-based trace-driven emulation framework named TERA. TERA uses FPGA to accelerate both trace extraction and trace execution. To avoid the potential influence...
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