- 更多网络例句与前沿相关的网络例句 [注：此内容来源于网络，仅供参考]
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Methods of measuring the input components, their prices and output elements are given. We put forward some new methods in measuring components, including composite depreciation rate, equality working hours, and proxy of input resources. Using the mature methods of efficiency measurement and decomposition available, we make a detailed investigation into 4 listing companies of oil industry with a span of 12 periods. Basic conclusions we draw include: labor inputs affects oil field output mostly in China; China oil fields operates in a low technical efficiency level average of 0.61; Increasing difficulties with expanding output has the greatest influence on cost; Cost efficiency of China oil fields averages at 1.47; Total factor productivity of China oil fields averages at 10%, accounting for 79% of the total output growth rate of 12.6%; Frontier technology progress contributes the most to TFP of China oil fields with 17 percentage points.
本文沿用了已有文献中关于效率计量与分解的成熟方法，对我国三家油田上市公司与一家上市石油公司12个时期的技术效率与成本效率进行了详细的计量、分解与分析，得到的基本结论有：劳动力投入是影响我国油田上市公司产出的最重要的影响因素；油田的平均技术效率仅为0.61；产出项是影响成本的显著因素，这说明随着产出增加而出现的开采难度增加是导致开采成本增加的重要因素；油田的平均成本效率为1.47；全要素生产率的增长平均在10％左右，占到了产出平均增长率12.6％的79％，表明我国油田的生产率的提高主要是依靠全要素生产率的提高而实现的，只有21％左右的产出增长是依靠要素投入而实现的；前沿技术进步是油田全要素生产率增长的主要源泉，在2001～2004年期间，前沿技术进步对油田生产率的贡献高达17个百分点。
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Properties of efficient portfolios and the efficient frontier to the model are systematically analyzed. Our main results concerning the properties are: every efficient portfolio can be solved by minimizing portfolio risk under a given level of portfolio return or by maximizing portfolio return under a given level of portfolio risk; on the efficient frontier, the risk is a convex and strictly increasing function of the return and the return is a concave and strictly increasing function of the risk; the utility function on the efficient frontier can be expressed as a quasi-concave function of the risk or the return if the investor's utility function is quasi-concave.
从理论上系统地对该模型下的有效投资组合和有效前沿的性质进行了分析，结果表明：每一个有效投资组合可通过在给定期望收益水平的条件下最小化投资组合风险来获得，或者在给定风险水平的条件下最大化期望投资组合收益来获得；在有效前沿上，风险是收益的严格单调递增凸函数，收益是风险的严格单调递增凹函数；当投资者的效用函数是拟凹函数时，则有效前沿上的效用可表达成风险或收益的拟凹函数。
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In the paper,the theory of production frontiers and its non-parametric measurement ap～proaches are used to figure out the input compressing productivity index,Malmquist productivity index based on the input oriented non-parametric production frontiers .The technology efficiency and thedis～tance function and their nonparametric models anr introduced on the conditions of Constant Return to Scale and input strong disposability The Non-pparametric measurement approaces and the decomposition of Malmquist prisuctibity index are put forward
孙巍文采用生产前沿面理论及其非参数方法，对假定产出确定条件下投入压缩的生产率指数基于投入前沿面的Malmquist生产率指数进行了理论与测度方法研究，通过规模收益不变且要素自由，C，S，前沿面条件下的技术效率，距离函数及其非参数模型的分析，本文给出了基于非参数，C，S，投入前沿面的Malmquist生产率指数的非参数测度模型，并从技术变化和资源配置效率变化两个方面进行了分解
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In this paper, the relationship between the fatigue crack front straightness S t and fatigue loading ratio f were explored.
通过实验，研究了疲劳裂纹前沿平直度 St与疲劳载荷比 f 之间的关系，发现两者高度正相关，为预制具有平直裂纹前沿的疲劳裂纹提供了有效的途径和方
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The results indicate that multiple reflections are favorable to the increase of depth. When the focal position is above the surface, the absorptive intensity on the front decreases, so the cutting depth decreases. When the focal position is below the surface, the position on the front with the maximum power intensity is downward. The intensity distribution is toward the deeper position, the cutting depth increases. But if the negative focal distance is extremely big, the intensity of the deeper position attenuates sharply with the increase of focal radius and light distances, so the depth deceases.
正离焦切割时，前沿吸收的总激光功率密度减小，切割深度减小；负离焦切割时，最大激光功率密度值的位置下移，使得前沿功率密度分布朝着深部推进，切割深度增加，若负离焦量过大，表面光斑直径和光程增加，更深位置的功率密度减小，切割深度减小；随着激光功率增加、切割速度减小，则前沿弯曲程度减小，被激光直接照射的前沿部位增长，前沿吸收激光功率密度增加，切割深度增加。
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Thereby, it generalizes portfolio frontier curve from hyperbola to hyperboloid of two sheets. When there exists risk securities, it generalizes frontier from straight line to cone. Meanwhile it gives some corresponding conclusions.
从而把原模型中没有无风险证券时的前沿证券曲线从双曲线推广到双叶双曲面，把有无风险证券时的前沿证券曲线从直线推广到圆锥面，同时还得到了一系列相应结论。
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The above-mentioned problem is not only related to the harbor waterway, the fore-dock depth, the amount and performance of the fore-dock machine, the process and efficiency of loading and discharging as well as the ingathering and outputting system, multi-transportation management and the policy of the port etc.
这一问题不仅涉及港口航道和码头前沿水深、码头前沿机械设备数量和性能、装卸工艺和效率，还关系到与集装箱港口相匹配的集疏运条件、多式联运组织管理和港口的政策环境等诸多问题。
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Besides, we can also determine the share of the every piece of stock. Finally, we give out the comparing analysis for the frontier we have got, breadthwise and lengthways: frontiers with different dealing costs and confidence levels; frontiers based on different risk measurement.
同时，本文还对所得到的有效前沿进行了比较分析：一方面是横向的，当预先设定参数改变时(如交易成本k、置信水平α)的不同有效前沿的比较；另一方面是纵向的，比较了基于不同风险度量的优化模型的比较前沿。
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IWA is at the forefront in connecting the broad community of water professionals around the globe - integrating the leading edge of professional thought on research and practice, regulators and the regulated, across national boundaries and across the drinking water, wastewater and stormwater disciplines.
每年IWA在世界各地组织和举办水管理和水技术的各类大会和研讨交流会，如两年一届的世界水大会，每年定期举办的技术前沿会议（分别是水资源可持续利用前沿技术、给排水处理技术前沿、水务资产管理前沿，作为对世界水大会内容的补充）。
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The uniphase C with W/≤0.3 can be synthesized without being preheated. When W/ is higher than 0.3, the sample expansion increases with the increase of W content, the reaction between W and C is incomplete, the combustion products consist of W〓C, WC, TiC, C, and unreacted W. Preheating mixtures can accelerate the completion of the reaction among Ti, W, and C. The uniphase C with W/=0.4 can be synthesized by SHS at preheat temperature of 600℃. There are two kinds of powders with size of 2-4μm and size less than 1μm in the combustion products.
通过燃烧前沿激冷淬熄试验及产物形貌特征（燃烧块断面组织和产物多晶聚合体颗粒）分析，创新性地提出了两种体系的自蔓延高温反应机制。1熔化—溶解—析出机制：当燃烧温度较高时，燃烧前沿Ti粉熔化，W和C溶解于熔融Ti里，而后C从熔融里析出。2扩散—固溶机制：当燃烧温度不足以使燃烧前沿Ti粉熔化时，通过C的扩散先形成TiC层，其后C沿着热应力导致的TiC层裂纹继续扩散，与固态Ti核反应生成TiC；同时，C扩散至W颗粒，形成W〓C，而后通过C的继续扩散W〓C转变成WC；与此同时，WC固溶至TiC里，形成C固溶体。
- 更多网络解释与前沿相关的网络解释 [注：此内容来源于网络，仅供参考]
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advancing front：前沿
arc melting metal powder 电弧熔化用的金属粉末 | advancing front 前沿 | beer still 蒸馏釜, 蒸馏锅
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advancing front：前沿推进法
模拟前端:front-end | 前沿推进法:Advancing front | 数字前端:Digital front-end
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baseball cap：前沿較寬長之遮陽帽
9) Leather Jacket 皮夾克 | 10) Baseball cap 前沿較寬長之遮陽帽 | 11) Windbreaker 防風衣(短夾克式)
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foreland facies：前沿地相; 陆架相
foreland 前陆,前滩,前沿地,前缘地 | foreland facies 前沿地相,陆架相 | foreland grits 前陆粗砂岩
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Efficient Frontier：有效前沿
在标准差-均值平面中(相当于标准差是横轴、均值是纵轴的直角坐标系中),均值-方差前沿(Mean-Variance Frontier, MVF)是双曲线的右半支,而所谓的有效前沿(efficient frontier)组合则是该右半支的上半部分.
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Defining the Laws of Motion：理解运动定律","站在时代前沿的科学家
"More Science of You","为什麼打呵欠","生活中的科学" | "Defining the laws of Motion","理解运动定律","站在时代前沿的科学家" | "Finding the First Vaccines","寻找疫苗","站在时代前沿的科学家"
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leading edge time：前沿时间
leading edge 前沿 | leading edge time 前沿时间 | leadkage impedance 漏泄阻抗
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Discovering Radioactivity：扬示放射现象","站在时代前沿的科学家
"Finding the First Vaccines","寻找疫苗","站在时代前沿的科学家... | "Discovering Radioactivity","扬示放射现象","站在时代前沿的科学家" | "Uncovering the Structure of DNA","解密DNA结构&qu
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Hardened cutting edges and chrome-nickel steel for extra-tough cutting edge：硬化前沿和铬镍钢课外强硬的前沿
Rust-resistant finish for greater protection; double-dipped ha... | Hardened cutting edges and chrome-nickel steel for extra-tough cutting edge硬化前沿和铬镍钢课外强硬的前沿 | Meets or exceeds ANSI sta...
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leading-edge overshoot：前沿过冲
leading-edge locus ==> 前缘轨迹 | leading-edge overshoot ==> 前沿过冲 | leading-edge pulse time ==> 脉冲前沿上升时间,脉冲前沿时间