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In order to help spinal cord injury (SCI) patients to walk again, a medical robot exoskeleton have been developed to assist these patients to walk independently in SIAT, Shenzhen. The robot has an under-drive control structure. The wearer can maintain balance and shift his (her) body weight with the aid of a pair of crutches. On this robot we have implemented a four-legged gait planning method. Through...
This paper presents a novel device that can be attached to a lower-limb exoskeleton to assist lower extremity hemiplegic patients during sitting down and standing up. Such device serves as a self-adaptive exoskeleton chair. The mechanical design has simple structure, great applicability, reliability and high driving efficiency. This paper first models and analysis the muscle forces during standing...
This paper introduces a novel approach to predict human motion for the Non-binding Lower Extremity Exoskeleton (NBLEX). Most of the exoskeletons must be attached to the pilot, which exists potential security problems. In order to solve these problems, the NBLEX is studied and designed to free pilots from the exoskeletons. Rather than applying Electromyography (EMG) and Ground Reaction Force (GFR)...
The steric and electronic properties of chiral Schiff base ligands derived from cinchona alkaloids were evaluated in asymmetric Henry reactions. Amongst these, the sterically hindered ligand 2 showed outstanding catalytic efficiency in the Cu(II) catalyzed asymmetric addition of nitroalkanes to a variety of aldehydes to afford the desired adducts in high yields (up to 97%) with excellent enantioselectivities...
Histidine triad nucleotide binding protein (HINT1) belongs to a histidine triad (HIT) superfamily, which contains a highly conserved His-X-His-X-His-XX motif (X is a hydrophobic amino acid) and plays an important role in many biological processes. In this study, we have isolated the full-length cDNA of an HINT1 homologue from maize (Zea mays L.), designated as Zm-HINT1. The full-length cDNA of Zm-HINT1...
Multiplication of a point is the main operation in elliptic curves cryptography system. It is well-known this operation be expensive in time-consuming. we try to improve the computing efficiency of multiple point which will increase the efficiency of elliptic curves cryptography. In order to reach this goal, on the basis of addition-subtraction method, we adopt recursive formula of double point to...
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