High angular color uniformity (ACU) is strongly required in many illumination applications. In this study, we presented the phosphor dip-transfer coating method to realize high ACU for phosphor-converted white LEDs. The mixture was coated on top surfaces of LED chips and formed thin convex layers by coating. optical simulations experiments were conducted performance verifications. Both numerical experimental results show that present can obtain very ACU. correlated temperature (CCT)...

Tire pressure monitoring is essential to driving safety. Indirect tire system (TPMS) a cost-effective alternative direct system. Its performance depends on the algorithm for data pre-processing and analysis which normally complicated, sensitive initial calibration with limited working range. In this work, four tests were carried out Baojun 530 different deflated in each case. Speed read through ABS CAN bus was analyzed traditional frequency based method employed identify tire. To simplify...

The shuffle operations are the bottleneck when mapping FFT-like algorithms to vector single instruction multiple data (SIMD) architectures.We propose six (three pairs) innovative memoryaccess fused instructions, which have been proved mathematically.Combined with proposed modified binary-exchange method, instructions can efficiently address problem for decimationin-frequency or decimation-in-time (DIF/DIT) radix-2/4 algorithms, reach a performance improvement by 17.9%-111.2%and reduce code...

More and more research has been done on tire pressure monitoring system (TPMS) with the rapid development of automobile industry increasing public attention to safety. It is generally known that suitable a critical factor in safe operation, wear, gas mileage performance motor vehicle. also important reduce maintenance logistic cost fleet for transportation. In order help maintaining normal pressure, TPMS designed monitor air temperature tires vehicle real time. The driver alerted immediately...

The efficiency of ubiquitous SIMD (Single Instruction Multiple Data) media processors is seriously limited by the bottleneck effect scalar kernels in applications. To solve this problem, a dual-core framework, composed micro control unit and an instruction buffer, proposed. This framework can dynamically decouple vector pipelines original single-core architecture into two free-running cores. Thus, be eliminated effectively exploiting parallelism between kernels. achieves best attributes both...

In 3D NoC-based many-core systems, DRAM accesses behave differently due to their different communication distances and the latency gap of becomes bigger as network size increases, which leads unfair access performance among nodes. This phenomenon may lead high latencies for some that become bottleneck system. The paper addresses fairness problem in systems by narrowing difference well reducing maximum latency. Firstly, a round-trip is modeled factors causing are discussed detail. Secondly,...

Binary Exchange Algorithm (BEA) always introduces excessive shuffle operations when mapping FFTs on vector SIMD DSPs. This can greatly restrict the overall performance. We propose a novel mod (2P-1) function and Mod-BEA algorithm (MBEA), which halve operation count unify mode. Such unified mode inspires us to set of memory-access instructions, totally eliminate operations. Experimental results show that combination MBEA proposed instructions bring 17.2%-31.4% performance improvements at...

In recent years, LEDs are applied in many novel illumination fields, and LED airport runway centerline lamp is a relatively new application airfield lighting. While such lamps used the of have strict requirements including mechanical reliability optical requirement, as color, luminous intensity incident angle etc [1, 2]. As we all know, there exists strong shock vibration when aircraft lands or taxis on runway, which inevitably causes adverse effects for reliability. Besides, different...

Correct tire pressure is a critical factor in the safe operation and performance of motor vehicle. Over inflated tires often result unnecessary wear, reduced gas mileage, less than optimal vehicle performance. Under typically increased decreased performance, compromise ability to maintain interface with road. A monitoring system (TPMS) designed monitor air temperature vehicle, that generates signal indicative each increase safety. TPMS mounted rings under rolling conditions presented plastic...

Task allocation is a traditional and complicated problem for system with many peripherals. Normal methodology focuses on fuzzy data transfer but unable to analyze some specific experimental statistics does not improve performance. Data Director (DD) an innovative packet-based manager, comprised of Index (DI) Packet Direct Memory Access (PDMA) realizes the enhanced in complex system. This paper presents improved task model enhance task-based three different methodologies. The results...

The exhaust energy recovery is significant for engine fuel efficiency. However, the gas interference and loss of flow affect utilization multi cylinder turbocharged diesel seriously. In this paper, through Particle Image Velocimetry experiment computational fluid dynamics simulation T-junction field, characteristics junction local field law are obtained. Based on one dimensional working process, available analysis carried out, transmission valve various pipe systems under typical operating...

In this paper, several reliability-related mechanics problems in flip-chip packages are discussed. These include failure modes (cracking and delamination) prevention, underfill selection design, board design effect of processing induced defects (settling effect, incomplete fill, debonding), ball pitch solder joint fatigue, reliability conductive epoxy.

The partitioning resources like pipelines and register files among clusters is proved to be an effective way improve performance scalability. However, improvement in scalability limited by traditional instruction encoding schemes that quickly run out of bits fixed-length words encode multiple operands. Meanwhile, clustered processors may come at a cost degradation, the major cause which data locality arising from lack available registers functional units. This paper introduces highly...

As the most widely used description code in digital circuits and system on chip (SoC), security of register transfer level (RTL) is extremely critical. Code obfuscation a typical method to ensure RTL code, but popular methods are not fully applicable code. In addition, some tools also have issues with incomplete functionality or errors. view above issues, this paper studies problem represented by obfuscation. Based extensible markup language (XML) syntax tree generated parsing complete...

In this paper, the creep behavior of a flip-chip package under thermal load was investigated by using nonlinear finite element technique coupled with high density laser moire interferometry. The real-time interferometry used to monitor and measure time-dependent deformation packages during test, while method adapted analyze variation stresses at edges corners interfaces time considering viscoelastic properties underfill viscoplastic solder balls. results show that balls does not have...

The combination of multi-core, SIMD and VLIW schemes is becoming prevailing in today’s media processor architectures. To achieve a deep insight into this trend, we propose power conscious performance model based on the rationale Hill Marty’s model. Several representative application kernels are evaluated proposed evaluation result shows that: for none communication applications, large number small cores optimal performance; architectures with reduced core count increased size preferred....

To further improve the performance of SIMD (Single Instruction Multiple Data) architectures, which are widely used in wireless communication domain. The main components Long Term Evolution (LTE) protocol analyzed. Performance investigation is taken on a cycle-accurate simulator, featuring characteristics existing architectures. Based investigation, three insightful architectural implications, including concurrent execution scalar and parallel processing, multiple sub-matrixes accessible...