浅谈计量自动化系统的应用及意义

电能计量自动化系统作为一个将静态的电能计量管理与动态的电能计量遥测融合的整体,有着远程抄表、在线监测、线损管理等应用,在电力营销管理中起着重要作用,为电量营销管理提供了技术支撑,对提高电力营销智能化水平具有积极的意义.针对汕头供电局而言,计量自动化系统成为日常工作中不可或缺的一部分,为供电企业经济运行、配网生产管理、线损管理、电力营销服务提供技术手段,提高了营销管理自动化、信息化水平.     

基建配网工程存在问题及对策分析

本文从电力建设发展趋势,引出配网项目管理在电力建设中的重要性。再通过分析配网项目管理现状,总结归纳出项目实施管理过程中存在的关于施工力量不足、管理不力、设计深度不足及造价控制不严四个方面不规范的情况;进一步从电力市场的成熟、项目管理力量及人员责任心三方面,论述了出现这些问题的三个根本原因;最后提出了解决现状存在问题的对策,有四项,分别是建立完善的电力施工市场、强调以项目部为代表的业主管理模式、推行配网项目全过程管理、以及完善评价机制,约束参建商行为。     

浅析分布式电源对配电网继电保护的影响

本文在介绍分布式发电技术的特点和优势、配电网保护基本原理及继电保护的基本要求基础上,从系统接入单个分布式电源的影响、系统接入单个分布式电源的影响、分布式电源对配网重合闸的影响等三个方面,分析了分布式电源对配电网继电保护的影响.     

小议配网调度管理的精益化

配网是电力系统中的一个重要组成部分,而配网调度工作的质量则对配网的供电安全性、稳定性和经济性有着直接的影响。本文在分析配网调度管理精益化重要性的基础上,对加强配网调度管理精益化的各种有效措施进行了探讨。     

配电网经济运行的技术措施研究

线损是电网线路及设备对电力的消耗,是电力企业自行消化的一个指标,线损率是国家考核电力部门电能损耗水平的一项重要技术经济指标,也是电力系统规划设计、生产运行、经营管理和企业经济效益水平的综合体现。追求尽可能低的线损率是电力企业的目标之一,也是提高企业经济效益的重要手段。     

从生产管理角度分析农配网线路跳闸率超标的原因

根据农配网供电优质服务、设备运维管理精益化的工作要求,针对某县电力公司2010年农配网综合故障停电率超过配网故障停电率标准的情况,从配电线路、变电设备、技术资料这三个方面入手,对如何降低该公司农配网跳闸率进行现场调研和专业探讨,提出了改变检修模式、提高农配网线路基础设施健康水平、加强设备运维管理工作力度、提高人员技能水平、加强继电保护管理等措施,从根本上降低农配网线路跳闸率,提高生产技术管理水平。     

广东省高校健美操社团现状调查与研究

通过对广东省部分高校健美操社团组织的特点、组建目的、组织构成及运行模式等方面的调查研究,分析了其形成与发展的影响因素,提出了从管理措施入手,积极扶持、加强引导、合理发展等对策与建议。     

电能计量装置故障管理

现如今我国人民生活水平普遍提高,用户对电能资源的需求量越来越大,为了适应这一现状,电力企业进行电能计量装置故障管理尤为必要。进行电能计量装置故障管理,能够降低电路故障发生的概率,在一定程度上为供电线路提供了安全保障,满足了广大用户的需求。本文深刻探讨了电能计量装置故障管理,并对电能计量装置常见故障进行了具体分析。     

基于比较优势的黑龙江省冰雪旅游产业发展对策研究

通过应用比较优势和要素禀赋理论,对比较优势理论对冰雪旅游产业的影响因素进行了分析,从资源要素、产品、技术、资金等方面同国内部分省份及欧美发达国家进行了比较分析,指出了黑龙江省冰雪旅游产业发展中的比较优势和不足之处,最后从合理利用资源打造冰雪旅游产业集群优势、资金、技术、人力资本市场培育等方面提出了我国冰雪旅游产业发展的对策。     

学生体质下降的社会因素分析

针对我国学生体质下降的严峻现实,从不良生活方式、学校教育偏差、家庭环境影响等方面分析了影响我国学生体质健康的社会因素,并提出了把学生体质列为学校考核的重要指标、加大对学生体育表现的激励政策力度、把学生群体作为社区体育的主体之一、建立学校社区家庭体育联动机制等对策建议。     

Carbohydrate ingestion improves endurance performance during a 1h simulated cycling time trial

This study examined the effect of carbohydrate ingestion on metabolic and performance-related responses during and after a simulated 1h cycling time trial. Eight trained male cyclists (VO 2 peak = 66.5ml kg -1 min -1 ) rode their own bicycles mounted on a windload simulator to imitate real riding conditions. At a self-selected maximal pace, the cyclists performed two 1h rides (separated by 7 days) and were fed either an 8% carbohydrate or placebo solution. The beverages were administered 25 min before (4.5ml kg -1 ) and at the end (4.5ml kg -1 ) of the ride. With carbohydrate feeding, plasma glucose tended (P = 0.21) to rise before the time trial. Compared with rest, the plasma glucose concentration decreased significantly (P < 0.05) at the end of both rides, with no statistically significant difference being observed between treatments. Thereafter, plasma glucose increased significantly (P < 0.05) at 15 and 30 min into recovery, and was significantly higher at 30 min during the carbohydrate trial compared with the placebo trial. No significant changes in plasma free fatty acids were observed during the ride. However, a significant increase (P < 0.05) in free fatty acids was found at 15 and 30 min into recovery, with no difference between trials. Mean power output was significantly (P < 0.05) greater during the carbohydrate compared with the placebo trial (mean - S.E.: 277-3 and 269-3W, respectively). The greater distance covered in the carbohydrate compared with the placebo trial (41.5-1.06 and 41.0–1.06km, respectively; P < 0.05) was equivalent to a 44s improvement. We conclude that pre-exercise carbohydrate ingestion significantly increases endurance performance in trained cyclists during a 1h simulated time trial. Although the mechanism for this enhancement in performance with carbohydrate ingestion cannot be surmised from the present results, it could be related to a higher rate of carbohydrate oxidation, or to favourable effects of carbohydrate ingestion on the central component of fatigue.     

Science and medicine of rowing: A review

The biology and medicine of rowing are briefly reviewed. Effort in a 2000 -m race is about 70% aerobic. Because the boat (and in some instances a cox) must be propelled, successful competitors are very tall, with a large lean mass and aerobic power. Large hearts may lead to erroneous diagnoses of a cardiomyopathy. Large respiratory minute volumes must be developed by chest muscles that are also involved in rowing. The vital capacity is typically large, and breathing becomes entrained. Expiration cannot be slowed relative to inspiration (as normally occurs at high rates of ventilation) and the limiting flow velocity may be reached, with the potential for airway collapse. Performance is strongly related to the power output at the ‘anaerobic threshold’, and lactate measures provide a guide to an appropriate intensity of endurance training. Peak blood lactate levels are higher in males (commonly 11–19 mmol·l -1 and occasionally as high as 25 mmol·l -1) than in females (9–11 mmol·l -1), probably because males have a greater muscle mass in relation to blood volume. The skeletal muscles are predominantly slow twitch in type, developing an unusual force and power at low contraction velocities. Many rowers have a suboptimal diet, eating excessive amounts of fat. Lightweight rowers also have problems of weight cycling. Aerobic power and muscle endurance often change by 10% over the season, but such fluctuations can be largely avoided by a well-designed winter training programme. Injuries include back and knee problems, tenosynovitis of the wrist and, since the introduction of large blades, fractures of the costae.     

我国体育市场管理法规研究

采用调查法和比较法对全国体育市场立法和管理现状进行调查,对部分较早出台并有一定代表性的省市的体育市场管理法规的立法和管理情况进行了研究,提出了体育市场管理立法和管理的原则、基本程序、措施及其一般模式,为规范全国体育市场管理提供参考依据。     

重新认识体育的社会关联

体育与政治之间存在一个悖论，体育的发展与经济实力之间没有直线相关，体育与教育部分重叠，体育与宗教最为近缘，体育可借用科学手段，体育的艺术禀性日益明显，体育与养生反映着两种人生观。     

上海社区体育竞赛参与者的特点探析

本文在专家访谈、问卷调查、数理统计和文献资料分析的基础上,探析了上海社区体育竞赛参与者的特点、参与者对社区体育赛事运作管理的看法等问题。在此基础上从引进社区体育赛事的志愿者、整合社区体育赛事的各种资源、开发社区体育竞赛的无形资产、组建非营利性的专业团队、规范社区体育赛事的服务管理等方面提出了进一步满足上海社区居民日益增长的体育竞赛参赛需求的对策与措施。     

对全面把握游泳训练环节的探讨

从系统观点出发,结合训练实践,对全面把握游泳训练环节进行探讨。认为应强化非智力因素在运动员多年训练中的作用,在育材全过程中不断选材,从整体上把握动态训练的全过程,把培养高水平运动员的整个过程置于一个严格的科学控制之下。     

我国优秀游泳运动员出发技术辅助训练的研究

为改进我国优秀游泳运动员的出发技术,采用观测和实验方法,通过拍摄运动员陆上和水下出发技术录像以及出发计时,对出发技术进行运动生物力学诊断和分析。在此基础上,根据运动员自身特点和不同泳姿提出相应的入水启动方式,并研制出发训练辅助器材,对出发预备姿势、腾起角度以及飞行远度和入水角进行控制。实践证明:这是一种快捷、有效的出发技术辅助训练方法。     

运动性呼吸肌疲劳与耐力性项目的运动能力

影响和限制耐力性运动项目的成绩的生理因素是复杂的和多方面的,取决于训练的强度和运动成绩.大强度持续性运动可导致呼吸肌疲劳.运动性呼吸疲劳可能在决定运动耐量方面起到关键的作用：一方面通过直接影响运动肌力量的生成（外周疲劳）,另一方面,通过肢体用力自感不安反馈引起工作肌运动单位输出功率下降（中枢疲劳）.对呼吸肌进行训练,可能有助于提高耐力性项目的运动成绩.     

Identifying home advantage in international tennis and golf tournaments

A regression analysis of competitors' tournament results in relation to their world rankings was proposed to identify the effect of home advantage in international ‘grand-slam’ tennis and ‘major’ golf tournaments. The results provided little evidence of home advantage in either the grand-slam tennis or the golf tournaments held in 1993. The only possible evidence of home advantage was found in the Wimbledon tennis and the US Open golf championships. Even these findings can be explained, at least partially, by (1) the availability of information concerning the low world rankings of the British tennis players competing at Wimbledon, and (2) selective entry, allowing only the world's top-ranked foreign golfers into the US open golf tournament. In both cases, the lower ranking home competitors have a greater opportunity to perform above their anticipated world rankings. Therefore, provided entry into tennis and golf tournaments is truly ‘open’ to both the host nation's representatives and foreign competitors alike, home advantage does not appear to be a major factor influencing the competitors' performance in such competitions. These findings may be explained by the relatively objective nature of the scoring systems used in tennis and golf, unlike the subjective influence of refereeing decisions on the results of team-games such as soccer.     

对欧洲足球技战术发展趋势的思考

结合欧洲足球技战术的发展特点,就鲁能泰山足球队的体能训练、技术训练、防守阵型、进攻方式、定位球、职业态度、球星培养等诸方面所存在的不足进行了分析,提出相应的改进意见。