Hybrid method for global optimization using more accuracy interval computation

In this paper,a novel hybrid method is presented for finding global optimization of an objective function.Based on the interval computation,this hybrid method combines interval deterministic method and stochastic evolution method.It can find global optimization quickly while ensuring the deterministic and stability of the algorithm.When using interval computation,extra width constraints accuracy of interval computation results.In this paper,a splitting method to reduce the extra width is introduced.This met...     

稳功率氦氖激光器电源的研制

一种新型氦氖激光器电源以直流12V输入,并采用开关电源逆变、倍压整流等技术;摒弃了传统的大电阻恒流的方式,采用了负反馈电路控制电流,减少了功耗,且稳流精度高于2％;还增加了稳功率电路,稳功率精度可达3％以上。     

Low-intensity pulsed ultrasound therapy: a potential strategy to stimulate tendon-bone junction healing

Incorporation of a tendon graft within the bone tunnel represents a challenging clinical problem. Successful anterior cruciate ligament (ACL) reconstruction requires solid healing of the tendon graft in the bone tunnel. Enhancement of graft healing to bone is important to facilitate early aggressive rehabilitation and a rapid return to pre-injury activity levels. No convenient, effective or inexpensive procedures exist to enhance tendon-bone (T-B) healing after surgery. Low-intensity pulsed ultrasound (LIPUS) improves local blood perfusion and angiogenesis, stimulates cartilage maturation, enhances differentiation and proliferation of osteoblasts, and motivates osteogenic differentiation of mesenchymal stem cells (MSCs), and therefore, appears to be a potential non-invasive tool for T-B healing in early stage of rehabilitation of ACL reconstruction. It is conceivable that LIPUS could be used to stimulate T-B tunnel healing in the home, with the aim of accelerating rehabilitation and an earlier return to normal activities in the near future. The purpose of this review is to demonstrate how LIPUS stimulates T-B healing at the cellular and molecular levels, describe studies in animal models, and provide a future direction for research.     

普通高校健美教学改革的尝试

以 97级健美专项课为对照组 ,采用传统教学法 ;98级健美专项课为实验组 ,采用乔·韦德的训练法则、杨宏建健身指导等方法 ,进行了三个阶段的实验研究。对实验组教学法改革前后及实验组与对照组结果进行对比分析 ,结果表明改进教学方法 ,对提高学生健身意识、健身效果、增强体质、提高教学质量有积极作用。     

广东优秀青少年体育舞蹈运动员身体形态的现状研究--长度、围度、宽度

通过对反映体育舞蹈运动员形态的长度、围度、宽度等生物学指标进行测试研究,以了解广东省优秀体育舞蹈运动员的有关选材方面的现状,探讨提高体育舞蹈运动技术水平的规律和途径;为今后开展体育舞蹈选材提供科学理论基础.     

圆装袖不同袖势结构制图的探讨

袖势是由袖窿深、袖山高、袖肥及袖山曲线确定的。文章通过对圆装袖不同袖势的变化因素进行分析,以期探讨袖势变化中如何合理设置其结构,使服装达到实用、美观、舒适的目的。     

10W集成开关电源的制作

Topwith—Ⅱ是一种PWM／MOSFET二合一的新型集成芯片，采用它制作高频开关电源，不仅简化了电路，同时可以改善电源的电磁兼容性能，降低制作成本，本文介绍一种用TOP223Y制作的稳压电源。     

钢筋混凝土构件在正常使用极限状态验算方面比较

比较分析《水工混凝土结构设计规范》(SL/T191-96)与《混凝土结构设计规范》(GB50010-2002)中的钢筋混凝土构件在正常使用极限状态验算方面的异同点。     

调频调宽脉冲开关电源触发电路的设计

采用2片555时基电路，其中一片控制频率，另一片控制占空比．产生频率为30Hz～10MHz连续可调；在10MHz频带宽度内，占空比为1％～99％连续可调的矩形触发脉冲，且频率和占空比均可独立调节．     

实用电路的设计与应用

本文通过两个实际电路的设计，探讨硬件电路的设计思想，说明电路设计的普遍性和特殊性的有机统一。