Abstract

The challenges in generating minimum time trajectory and control for generic quadrocopter flying through sophisticated and unknown environment are explored in this paper. The proposed method uses convex programming technique to optimize polynomial splines, which are numerically stable for high-order including large number of segments and easily formulated for efficient computation. Moreover, exploiting the differential flatness of system, these polynomial trajectories encode the dynamics and constraints of the vehicle and decouple them from trajectory planning. The framework is fast enough to be performed in real time and results in solution which is close to time optimal. As control inputs are computed from the generated trajectory in each update, they are applicable to achieve closed-loop control similar to model predictive controller.

Abstract

Today, IaaS cloud providers are dynamically minimizing the cost of data centers operations, while maintaining the Service Level Agreement (SLA). Currently, this is achieved by the live migration capability, which is an advanced state-of-the-art technology of Virtualization. However, existing migration techniques suffer from high network bandwidth utilization, large network data transfer, large migration time as well as the destination's VM failure during migration. In this paper, we propose Reliable Lazy Copy (RLC) - a fast, efficient and a reliable migration technique. RLC provides a reasonable solution for high-efficiency and less disruptive migration scheme by utilizing the three phases of the process migration. For effective network bandwidth utilization and reducing the total migration time, we introduce a learning phase to estimate the writable working set (WWS) prior to the migration, resulting in an almost single time transfer of the pages. Our approach decreases the total data transfer by 1.16 x - 12.21x and the total migration time by a factor of 1.42x - 9.84x against the existing approaches, thus providing a fast and an efficient, reliable VM migration of the VMs in the cloud.

Abstract

Multiprocessors have been widely used in modern high performance embedded system to meet the computational needs of smart, real time applications spread across multiple domains. While custom IPs (Intellectual Property) on FPGA based systems are commonly used, multiprocessing on FPGAs have not been explored enough due to concerns about meeting a right trade-off between area usage, achievable performance, and the required design time. This paper presents an implementation of a multiprocessing system on FPGA using multiple light weight soft processors (LWP) that work in conjunction with a custom hardware to achieve balanced performance to resource ratio. As an example we have implemented a TDEA (Triple Data Encryption Algorithm) cryptographic algorithm on our multiprocessing system that uses 2.5X less area, is 40% faster in performance, and requires 20% less power as compared to equivalent solution implemented using a commercial soft processor.

Abstract

A switching converter (DC-DC) cascaded with a low dropout regulator (LDO) gives the best trade off in terms of high system efficiency and low output ripple for automotive power management applications. The dropout voltage of the LDO is fixed based on its peak load. An adaptive LDO dropout technique, based on LDO load-current sensing, has been proposed to improve the moderate and light load system efficiency of the cascaded DC-DC and LDO combination. The feedback from LDO output to DC-DC output is stable and has minimal overhead (<; 2%) in terms of area and current consumption. The 1V LDO with adaptive dropout gives an efficiency improvement of 74% for 1A load to 81.6% for 100uA load across input voltage range of 6V to 18V. The overall hybrid regulator efficiency improvement upto 5% is achieved in simulations using 0.35μm AMS H35 process.

Abstract

Channel bonding is a mechanism deployed to synchronize serial communication channels of higher data rate and bandwidth applications. Application that demands higher bandwidth, for example 400G Ethernet, it is not possible to achieve such massive rate using single high speed serial IO channel and aggregating multiple communication-links as a single communication channel makes such ultra-high speed realizable. One challenge that is faced in aggregating communication links is elimination of serial data skew introduced by non-identical trace length of the serial links. Various techniques exist to de-skew lanes in the receive side of the high speed serial transceiver. This paper presents a novel approach to channel bonding that optimizes area, power, initialization time and yields better performance. The idea discussed here is based on a delay based model and explores the possibility of performing channel bonding in a centralized way rather than a distributed way.

Abstract

This paper explains the importance of the role played by photon lifetime in the generation of terminal voltage across Semiconductor Ring Laser Gyroscope (SRLG). This terminal voltage can be used for direct measurement of rotation rate.

Abstract

Magnitudes that have the epicentrical distance from7 to 343 kilometers. The focal depth ranges from 20-100 km. The seimograms which are used in this study.

Abstract

Saturation area E and porisity paramenter using new data set recorded by the Gujarath sesmic network of India.

Abstract

day by day increasing cost of vehicle transport service for petrolium product, made pipeline as more affordable mean

Abstract

Ports are lifeline systems that function as storage and maintaning facility for the transport of cargos. The port structures are frequently exposed to failure under