陕西省优秀跆拳道运动员力量测试与分析

采用ISOMED2000获得陕西省优秀跆拳道运动员膝关节等速向心收缩的生物力学特征。跆拳道运动员右膝的力量与爆发力强于左膝,建议加强左膝屈伸肌群的力量练习与训练中的实战进攻训练;建议以300°/s伸小腿,可以发挥小腿伸肌群的爆发能力。     

优秀跆拳道运动员踝关节屈伸肌群等速测试与研究

跆拳道运动员左右踝跖屈的力量明显大于背屈的力量,在240°/s时最明显,左踝跖屈/背屈比为9.13,右踝关节跖屈/背屈比为12.29,屈伸比值较大。左踝关节跖屈肌群力量在60°/s,120°/s,240°/s时分别大于大于右踝跖屈肌群力量(P<0.05),这可能与跆拳道运动员进攻时习惯左腿支撑身体重量而右腿进攻有关。     

不同拉枝角度对嘎拉苹果叶片质量的影响

本试验在陕西省宝鸡市农业科技果业专家大院苹果园进行,以9-10年生细长纺锤形嘎拉树为试材,选高度、方位、生长势基本一致的枝条作为单位枝进行40°-50°(Ⅰ),60°-70°(Ⅱ),80°-90°(Ⅲ),100°-110°(Ⅳ)4个角度的拉枝处理。2009-2010年测定了叶片质量、叶片色素物质、叶片N、P、K、Ca、Mg含量。.研究适宜渭北苹果产区嘎拉生长的枝条角度。     

不同拉枝角度对嘎拉苹果果实品质的影响研究

为探讨苹果主栽品种嘎拉细长纺锤形小主枝的适宜拉枝角度,分别进行了40°～50°、60°～70°、80°～90°、100°～110°4个水平的拉枝处理,测定了、果实品质相关指标。结果表明:拉枝角度80°以上比70°以下果实品质好。拉枝角度80°～90°比100°～110°时果实单果重高,而果实着色指数和Vc含量低;单叶鲜重、果实光洁指数、果皮叶绿素含量、果形指数、硬度、可溶性固形物、可溶性总糖、可滴定酸含量等指标值及单枝产量差异不显著。综合考虑,在陕西渭北南部苹果产区,嘎拉苹果纺锤形小主枝的拉枝角度以90°～100°为宜。     

浅谈较大坡度的斜屋面结构施工技术

对设计坡度在30°～60°之间的坡屋面结构施工进行阐述.采用双层模板、分级浇筑,保证坡屋面结构的质量。     

万能角度尺测量结果的不确定度评定

1、测量过程简述●测量依据:JJG33-2002《万能角度尺检定规程》。●测量环境条件:温度(20±10)℃,相对湿度≤80%。●测量标准:2级角度块,最大允许示值误差为30″。●被测对象:分度值为2′,测量范围0°～360°的万能角度尺,其最大允许示值误差为2′。●测量方法:用相应角度值的2级角度块与游标万能角度尺两测量面均匀接触,在制动器松开与紧固时各检定一次,角度尺的示值与角度块的示值之差即为万能角度尺的示值误差。●评定结果的使用:在符合上述条件下的测量结果,一般可直接使用本不确定度的评定结果。2、数学模型△L=Li-L0式中:△L——万…     

血压计示值管偏差分析修理

在日常使用中,血压计示值管垂直度偏差往往容易被人们忽视。一般情况下,打开台式血压计上盖后与底壳应成直角(90°),JJG270-1995检定规程规定,血压计示值管垂直度允许偏差为±2°。下面针对血压计示值管垂直度偏差问题做以分析。1、垂直度偏差对台式血压计准确度的影响如图1可知,当示值管上的读数值为L时,液柱的实际高度为:H=LcosaHHLLaaLa图一式中H为实际液柱高度;a为偏角;L为示值高度。对于测量上限L=300mmHg=40kPaH=40cosa当偏差分别为2°,3°,5°,7°,10°时,则为:H1=40cos2°=39.9756≈39.976(kPa)H2=40cos3°=39.9452≈39.945…     

重庆农业和农村经济概况

重庆直辖市地跨东径105°1l′～110°11′,北纬28°10′～32°13′之间,位于青藏高原与长江中下游平原的过渡地带,主要分布在长江沿线。东邻湖北省、湖南省,南靠贵州省,西接四川省内江市、遂宁市,北连陕西省和四川省达川、广安地区,东西长470公里,南北宽450公里。现辖43个区市县,73个区公所,1506个乡(镇、街道办事处),幅员面积8.2万平方公里,居全     

综合蓄热法混凝土冬季施工表面温度实测及分析

在严寒地区,建筑工程组织冬季施工,可以加快施工进度,缩短工程建设周期;混凝土工程在极限气温不低于-15°C、平均气温不低于-5°C时,采用综合蓄热法进行混凝土冬季施工,投入费用不多,措施简单可行。本文通过就其工程混凝土在冬季施工表面温度实测及分析进行论述,仅供参考。     

论360°绩效考评主体的道德风险

本文介绍了360°绩效考评的相关概念,并结合实际情况,详细分析了目前我国考评主体道德风险的各种表现形式和内在原因.在此基础上,沿用激励相容机制的思想,对360°绩效考评主体道德风险的解决提出了系统性的建议,同时从成本--收益的角度对此进行了深入的剖析.     

用引力子反速度计算光线经过太阳表面的偏转角及水星的进动角

本文提出引力子以1.5×1010m/s的反速度传递引力的假设,并通过引力子反速度的数字模型计算出光线经太阳表面所形成的偏转角约为1.75″;还用引力子反速度的数字模型计算出水星轨道近日点的进动角约为0.104″,百年地球日的进动角约为43.1808″,理论值与实测值精确吻合。最后推出了太阳系行星进动角的计算通式为:cos△ω=△VG=0.9815≈0.99°。     

基于CPLD的正交磁通门传感器设计

简述了磁通门传感器技术中二次谐波法的原理,用软磁材料坡莫合金制作传感器探头磁芯,设计了基于CPLD的正交磁通门传感器。传感器能够实现水平载体的航向角数值,在0°³60°范围内航向角的测量精度可达1°,系统分辨率可达0.1°,可以满足水平定向导航的性能要求。     

掺硅二氧化钛复合薄膜超亲水性研究

采用溶胶-凝胶法在普通载玻片上制备TiO2-SiO2复合薄膜,文章研究了SiO2添加量对润湿角的影响。结果表明:通过在TiO2薄膜中加入SiO2,能显著降低薄膜的润湿角,超亲水性状态可以保持很长时间;当SiO2添加量为30%时,在紫外光照1h,薄膜的润湿角接近0°,光催化活性最佳。     

岩屑床的形成机理及对环空ECD的影响

在大位移井钻井过程中,由于井眼长度较长,并且最终井斜角过大,岩屑很容易在大斜度井段和水平井段沉积下来,形成岩屑床,造成井眼不清洁。岩屑床的形成对钻井安全造成了很大的影响,可能会导致一些复杂情况发生,例如钻速降低、高扭矩和高摩阻、粘附卡钻等等。同时,岩屑床的存在对水力参数也有很大的影响,因此很有必要来研究岩屑床的形成原因以及对水力参数的影响。     

The macroeconomic impact of economic uncertainty and financial shocks under low and high financial stress

External financial frictions might increase the severity of economic uncertainty shocks. We analyze the impact of aggregate uncertainty and financial condition shocks using a threshold vector autoregressive (TVAR) model with stochastic volatility during distinct US financial stress regimes. We further examine the international spillover of the US financial shock. Our results show that the peak contraction in euro area industrial production due to uncertainty shocks during a financial crisis is nearly-four times larger than the peak contraction during normal times. The US financial shocks have an influential asymmetric spillover effect on the euro area. Furthermore, the estimates reveal that the European Central Bank (ECB) is more cautious in implementing a monetary policy against uncertainty shocks while adopting hawkish monetary policies against financial shocks. In contrast, the Fed adopts a more hawkish monetary policy during heightened uncertainty, whereas it acts more steadily when financial stress rises in the economy.     

Standardization of orthopedic hip and knee implants

The standardization of orthopedic hip and knee implants was a collaborative endeavor by material management, orthopedic surgeons, and operating room nursing staff. The key concept was to eliminate paying list price for hip and knee implants and to standardize to one vendor and establish the hospital as the premier center for total joint replacement.     

The Millennium Peak in Club Convergence: A New Look at Distributional Changes in The Wealth of Nations

This paper proposes an easy‐to‐use nonparametric indicator for club convergence, or convergence within clusters of countries: it measures whether the modes of the gross domestic product (GDP) per capita distribution become more pronounced over time. Relying on changes in the critical bandwidth for unimodality, the indicator is a dynamic extension of concepts from often‐used multimodality tests. Its evolution suggests the new empirical result of a ‘millennium peak’ in club convergence in the worldwide GDP per capita distribution. The club convergence movements of the 1980s and 1990s, when groups of poor and rich countries converged to two separate points, was followed by a de‐clubbing movement after the turn of the millennium. Copyright © 2016 John Wiley & Sons, Ltd.     

Hip‐Hop as Urban and Regional Research: Encountering an Insider's Ethnography of City Life

This essay suggests that hip‐hop music may reasonably be thought of as a form of urban and regional research. The essay draws upon a recently published book by hip‐hop artist Jay‐Z, which provides biographical information alongside translations of the lyrical content of his works, to show that hip‐hop is full of insider ethnographic insights into urban life. This, it is argued, can be thought of as an answer to Daryl Martin's call for a more ‘poetic urbanism’, an urbanism that captures the material, sensory and emotional aspects of the city. The essay uses Jay‐Z's text to illustrate the type of insights and ideas that we might obtain from hip‐hop, giving some specific examples of these insights and concluding with some reflections upon this alternative insider account of city life — and how it might provide us with opportunities for expanding our repertoire.     

Growth opportunities,corporate governance and the market value of multinational joint ventures

This paper examines whether differences in investment opportunities and corporate ownership structure can explain the disparate findings of other researchers with regard to the market's price reaction to the announcement of international joint ventures. We study a sample of 320 joint ventures announced during the period 1987–92. The sample joint ventures involve at least one US partner and one or more international partners from emerging economies (former communist countries in Eastern Europe and China), as well as industrialized G7 countries. We find that international joint ventures are on average wealth creating when the foreign partner comes from an emerging economy but are wealth neutral when the partner is from an industrialized country. This finding supports the investment opportunity set hypothesis. However, we do not find support for the shareholder-management alignment hypothesis in that higher insider holdings or a greater level of outsiders on the board for the US partner will lead to joint venture investments that are more highly valued by investors, other things remaining the same. © 1998 John Wiley & Sons, Ltd.