Lateral epicondylitis is a relatively common clinical prob lem, easily recognized on palpation of the lateral protu berance on the elbow. Despite the "itis" suffix, it is no an inflammatory process. Therapeu...Lateral epicondylitis is a relatively common clinical prob lem, easily recognized on palpation of the lateral protu berance on the elbow. Despite the "itis" suffix, it is no an inflammatory process. Therapeutic approaches with topical non-steroidal anti-inflammatory drugs, cortico steroids and anesthetics have limited benefit, as would be expected if inflammation is not involved. Other ap proaches have included provision of healing cytokine from blood products or stem cells, based on the recog nition that this repetitive effort-derived disorder repre sents injury. Noting calcification/ossification of tendon attachments to the lateral epicondyle(enthesitis), dry needling, radiofrequency, shock wave treatments and surgical approaches have also been pursued. Physi ologic approaches, including manipulation, therapeuti ultrasound, phonophoresis, iontophoresis, acupuncture and exposure of the area to low level laser light, ha also had limited success. This contrasts with the benefi of a simple mechanical intervention, reducing the stres on the attachment area. This is based on displacemen of the stress by use of a thin(3/4-1 inch) band applied just distal to the epicondyle. Thin bands are required as thick bands(e.g., 2-3 inch wide) simply reduce mus cle strength, without significantly reducing stress. Thi approach appears to be associated with a failure rateless than 1%, assuming the afflicted individual modifies the activity that repeatedly stresses the epicondylar attachments.展开更多
Sports video appeals to large audiences due to its high commercial potentials. Automatically extracting useful semantic information and generating highlight summary from sports video to facilitate users' accessing...Sports video appeals to large audiences due to its high commercial potentials. Automatically extracting useful semantic information and generating highlight summary from sports video to facilitate users' accessing requirements is an important problem, especially in the forthcoming broadband mobile communication and the need for users to access their multimedia information of interest from anywhere at anytime with their most convenient digital equipments. A system to generate highlight summaries oriented for mobile applications is introduced, which includes highlight extraction and video adaptation. In this system, several highlight extraction techniques are provided for field sports video and racket sports video by using multi-modal information. To enhance users' viewing experience and save bandwidth, 3D animation from highlight segment is also generated. As an important procedure to make video analysis results universally applicable, video transcoding techniques are applied to adapt the video for mobile communication environment and user preference. Experimental results are encouraging and show the advantage and feasibility of the system for multimedia content personalization, enhancement and adaptation to meet different user preference and network/device requirements.展开更多
This paper discusses causes of the rate ripple in inertia guidance test equipment IGET, systematically analyses their effects an the rate ripple in IGTE. The analysis result shows： The rate ripple caused by the perio...This paper discusses causes of the rate ripple in inertia guidance test equipment IGET, systematically analyses their effects an the rate ripple in IGTE. The analysis result shows： The rate ripple caused by the periodic errors of inductosyn and angular encoder is higher at high speed than that caused by magnetic ripple torque and friction torque, and it cannot be eliminated by adjusting control parameters of the system. And based on the nonlinear adaptive control system theory, the paper puts forward a new control system scheme to eliminate the rate ripple caused by the periodic errors of inductosyn and angular encoder, develops the adaptive control rules and makes simulation and test. Experimental result shows a significant improvement on those tables for the period disturbs under the system scheme designed. By this plan, with the input of rate 200°/s, the rate ripple falls from 5°/s to 0. 4°/s within about 6s adaptive adjustment time, being a twelfth of before adaptation, which can not be reached by common classical controls. The experimental results conform with the simulation, which proves the validity and practicability of the plan.展开更多
文摘Lateral epicondylitis is a relatively common clinical prob lem, easily recognized on palpation of the lateral protu berance on the elbow. Despite the "itis" suffix, it is no an inflammatory process. Therapeutic approaches with topical non-steroidal anti-inflammatory drugs, cortico steroids and anesthetics have limited benefit, as would be expected if inflammation is not involved. Other ap proaches have included provision of healing cytokine from blood products or stem cells, based on the recog nition that this repetitive effort-derived disorder repre sents injury. Noting calcification/ossification of tendon attachments to the lateral epicondyle(enthesitis), dry needling, radiofrequency, shock wave treatments and surgical approaches have also been pursued. Physi ologic approaches, including manipulation, therapeuti ultrasound, phonophoresis, iontophoresis, acupuncture and exposure of the area to low level laser light, ha also had limited success. This contrasts with the benefi of a simple mechanical intervention, reducing the stres on the attachment area. This is based on displacemen of the stress by use of a thin(3/4-1 inch) band applied just distal to the epicondyle. Thin bands are required as thick bands(e.g., 2-3 inch wide) simply reduce mus cle strength, without significantly reducing stress. Thi approach appears to be associated with a failure rateless than 1%, assuming the afflicted individual modifies the activity that repeatedly stresses the epicondylar attachments.
基金Project supported by NEC Research of China (No. 0P2004001),"Science 100 Plan" of the Chinese Academy of Sciences (No. m2041),and the Natural Science Foundation (No. 4063041) of Beijing, China
文摘Sports video appeals to large audiences due to its high commercial potentials. Automatically extracting useful semantic information and generating highlight summary from sports video to facilitate users' accessing requirements is an important problem, especially in the forthcoming broadband mobile communication and the need for users to access their multimedia information of interest from anywhere at anytime with their most convenient digital equipments. A system to generate highlight summaries oriented for mobile applications is introduced, which includes highlight extraction and video adaptation. In this system, several highlight extraction techniques are provided for field sports video and racket sports video by using multi-modal information. To enhance users' viewing experience and save bandwidth, 3D animation from highlight segment is also generated. As an important procedure to make video analysis results universally applicable, video transcoding techniques are applied to adapt the video for mobile communication environment and user preference. Experimental results are encouraging and show the advantage and feasibility of the system for multimedia content personalization, enhancement and adaptation to meet different user preference and network/device requirements.
文摘This paper discusses causes of the rate ripple in inertia guidance test equipment IGET, systematically analyses their effects an the rate ripple in IGTE. The analysis result shows： The rate ripple caused by the periodic errors of inductosyn and angular encoder is higher at high speed than that caused by magnetic ripple torque and friction torque, and it cannot be eliminated by adjusting control parameters of the system. And based on the nonlinear adaptive control system theory, the paper puts forward a new control system scheme to eliminate the rate ripple caused by the periodic errors of inductosyn and angular encoder, develops the adaptive control rules and makes simulation and test. Experimental result shows a significant improvement on those tables for the period disturbs under the system scheme designed. By this plan, with the input of rate 200°/s, the rate ripple falls from 5°/s to 0. 4°/s within about 6s adaptive adjustment time, being a twelfth of before adaptation, which can not be reached by common classical controls. The experimental results conform with the simulation, which proves the validity and practicability of the plan.
