新一代网络差异设备盲区消除的安全检测模块设计

提出了一种针对IPv6网络设备的安全检测模块设计方法。针对IPv6设备中的差异连接申请、差异化对象转接中的有效保存、不一致异常数据包的有效采集3个IPv6设备特有的关键问题,设计了差异数据v接收线程域、转发对象域以及海量文件缓冲区3项模块新功能,很好地解决了IPv6网络设备的安全检测难题。实验结果说明,该模型能够快速、准确检测出IPv6网络模块设备终端的异常数据,采集到的异常数据包成功率从现有的67%提高到了88%,有着较好的应用性。     

Monitoring residual 36 h post-match neuromuscular fatigue in rugby union; a role for postural control?

Abstract

The present study investigated single-leg balance and landing measures, respectively, at the beginning of a weekly micro-cycle 36?h after a match compared to 48?h rest without any match load. Twenty-seven professional rugby union players performed balance and landing tests on a 1000?Hz force plate across three in-season micro-cycles either with or without match loads in the prior 36?h. Participants were further sub-divided into higher and lower match load groups to investigate changes in balance and landing variables. Differences between rested and 36?h post-match single-leg balance sway velocity were trivial in all cases, except for the higher-load group on the dominant leg, which were possibly impaired 36?h post-match (ES?±?90% CL?=?0.68?±?0.66). Differences between rested and 36?h post-match single-leg landing measures of relative impulse on the non-dominant leg were possibly lower (0.36?±?0.34), with possible impairment observed on both legs in the higher load group 36?h post-match (0.39?±?0.33; 0.49?±?0.42). Differences in landing measures of peak force and time to stabilisation were mainly trivial (ES?<?0.20). Postural control measures at 36?h post-match are comparable to a rested state; though impairment of sway velocity on the dominant leg and landing impulse may indicate residual neuromuscular fatigue resulting from increased match exposure.     

SQL Server安全管理教学研究

安全管理是SQL server 2000的精髓之一,也是本门课程教学的重点之一.由于教材和参考资料在这一部分编写都有欠缺,仅按照教材或参考资料的思路给学生授课,会使学生迷惑不解,收不到好的效果.对安全管理进行教学研究,提出要重视理论知识,对比分析安全模式、登录账号等重点名词,演示自己编写的典型例题.教学中注意到这几个方面,能让学生真正吃透安全管理,并且提高动手能力.     

自由式滑雪空中技巧运动员出台技术、下肢力量与落地稳定性关系研究

以国家自由式滑雪空中技巧男、女运动员为研究对象,以运动生物力学的研究手段为依托,以运动员最佳技术状态参加第21届冬奥会为最终研究目标,从运动员技术分析评价、运动员下肢环节肌力特点分析、冲击力实验推测3周台冲力范围等方面进行研究,推测出3周台冲击力分布范围,为女子运动员冲击3周台动作的安全性提供了科学依据;揭示了运动员的出台技术、落地稳定性的关系,为运动员高质量地完成空中动作,同时获得稳定的、安全的落地提供了依据,为运动员冲击难度动作时能安全高质量地完成提供科技保障,为运动员在第21届冬奥会中取得优异成绩提供了科技支撑。     

双边轮式斜拉桥悬索检测机器人设计与分析(英文)

为了检测斜拉桥圆柱形悬索内部钢丝情况,设计了一种新型的双边轮式悬索爬升机器人,简述了其机械结构及运动方式,建立了爬升模型,分析了其机构的静态特性,并以直径为139 mm的悬索为例给出了相关设计参数.为使机构在电路系统故障时能安全回收,提出了一种基于反电动势理论的安全节能回收方法,应用曲柄滑块驱动气缸设计了气体阻尼机构,以消耗机构下降时因重力作用产生的多余动能,并建立了机构数学模型来仿真下降速度.试验结果表明,所设计的机器人能携带3.5 kg重物沿直径为65～205 mm的悬索平稳运行,满足了悬索检测的实用要求.     

Kinematic and neuromuscular relationships between lower extremity clinical movement assessments*

Lower extremity injuries have immediate and long-term consequences. Lower extremity movement assessments can assist with identifying individuals at greater injury risk and guide injury prevention interventions. Movement assessments identify similar movement characteristics and evidence suggests large magnitude kinematic relationships exist between movement patterns observed across assessments; however, the magnitude of the relationships for electromyographic (EMG) measures across movement assessments remains largely unknown. This study examined relationships between lower extremity kinematic and EMG measures during jump landings and single leg squats. Lower extremity three-dimensional kinematic and EMG data were sampled from healthy adults (males = 20, females = 20) during the movement assessments. Pearson correlations examined the relationships of the kinematic and EMG measures and paired samples t-tests compared mean kinematic and EMG measures between the assessments. Overall, significant moderate correlations were observed for lower extremity kinematic (r_avg = 0.41, r_range = 0.10–0.61) and EMG (r_avg = 0.47, r_range = 0.32–0.80) measures across assessments. Kinematic and EMG measures were greater during the jump landings. Jump landings and single leg squats place different demands on the body and necessitate different kinematic and EMG patterns, such that these measures are not highly correlated between assessments. Clinicians should, therefore, use multiple assessments to identify aberrant movement and neuromuscular control patterns so that comprehensive interventions can be implemented.     

The collision forces and lower-extremity inter-joint coordination during running

The purpose of this study was to compare the lower extremity inter-joint coordination of different collision forces runners during running braking phase. A dynamical system approach was used to analyse the inter-joint coordination parameters. Data were collected with six infra-red cameras and two force plates. According to the impact peak of the vertical ground reaction force, twenty habitually rearfoot-strike runners were categorised into three groups: high collision forces runners (HF group, n = 8), medium collision forces runners (MF group, n = 5), and low collision forces runners (LF group, n = 7). There were no significant differences among the three groups in the ankle and knee joint angle upon landing and in the running velocity (p > 0.05). The HF group produced significantly smaller deviation phase (DP) of the hip flexion/extension-knee flexion/extension during the braking phase compared with the MF and LF groups (p < 0.05). The DP of the hip flexion/extension-knee flexion/extension during the braking phase correlated negatively with the collision force (p < 0.05). The disparities regarding the flexibility of lower extremity inter-joint coordination were found in high collision forces runners. The efforts of the inter-joint coordination and the risk of running injuries need to be clarified further.     

2017年夏季全国气候趋势展望

2017年春季至夏初,赤道中东太平洋海温将处于中性状态。2017年夏季（6-8月）,全国总体降水形势趋于常年,出现大范围洪涝灾害的可能性不大。预计,华南大部、黄淮流域、华北东部、东北南部、东北北部、新疆大部和西藏南部地区降水正常略偏多,其中新疆北部降水偏多2成左右。我国其他大部分地区降水正常略偏少。预计2017年登陆台风数接近正常。     

利用关键链技术进行科研项目计划进度管理改进探索

基于某科研项目的实际实施情况,总结传统方法带来的问题,提出引入新的计划进度管理方法——关键链技术,通过考虑资源约束和设置缓冲管理,进行科研项目计划进度管理的改进探索。对比传统方法效果表明,关键链技术能够更科学的制定科研项目计划并实现进度控制目标。     

2018年夏季全国气候趋势展望

中科院大气所ENSO预测结果显示,2018年夏季（6—8月）,赤道中东太平洋海温将处于中性状态。中科院大气所的全国气候趋势预测结果表明,2018年夏季（6—8月）,全国总体形势为降水趋于常年。部分地区可能呈现偏多或偏少的情况。具体为,东北东部、华北大部、西北地区东部、江南大部、华南北部和中部降水正常略偏多,其中河套地区降水偏多2—5成,可能发生局地洪涝。我国其他大部分地区降水正常略偏少。登陆台风数正常偏少。