查询词典 frontier

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。

Then it puts forward sub-regional-economic cooperation as the best choice for Yunnan and its neighboring countries to have economic and trade cooperation. In the practical study of developing Yunnan"s frontier trade, this essay analyzes to the full the current situation and existing problems of developing Yunnan frontier trade, combining with China"s accession to WTO, exploration of the west regions and the founding of the ASEAN. Frontier trade plays an important role in the nation"s and Yunnan province"s social economic life. It has great influence on the nation"s safety. Frontier trade is centered on the low-cost consumable supplies and consignation trade. Its prosperity for a long time relies on the inland, which constitutes three remarkable characteristics of Yunnan"s frontier trade.

在开展云南省边境贸易的实践研究中，本文从六个方面较为全面地分析了云南省边境贸易发展的现状、存在的问题，指出：边境贸易在全国和全省社会经济生活中占有重要地位，对国家安全影响深远；边境贸易以低附加值商品和易货贸易为主；边境贸易市场的繁荣长期依赖内地，是云南省边境贸易最显著的三个特点，结合中国加入WTO、西部大开发、大东盟的成立等，对云南边境贸易在新时期的发展方向作了一些初浅的探讨。

This text introduced Guangxi in more frontier trade development of the history and present condition, concretely analyzed frontier in Guangxi to trade the advantages such as policy and niche etc.s of the quick development, point out the frontier trade a development in the process exist of problem, and put forward correspond of resolve the measure and the development foreground of side 贸 in Guangxi.

本文介绍了广西中越边境贸易发展的历史和现状，具体分析了广西边境贸易迅速发展的政策和区位等优势，指出了边境贸易发展过程中存在的问题，并提出了相应的解决措施以及广西边贸的发展前景。

Location of the inland frontier regions have greater uncertainty and imperfectibility at politics and economy than other regions,therefore the border " shielding effect " makes the actual advantage of location of the inland frontier regions uncertain,especially the relative advantage may change in the future,cause the transaction costs of the inland frontier regions to be redounded .

内陆边境地区在政治和经济上存在较大的不确定性以及信息上的不对称性和不完善性，由此产生的边界"屏蔽效应"使得内陆边境地区的区位实际优势不确定、特别是相对优势在未来可能发生变化，导致内陆边境地区的交易成本被抬高。

Gao Shi and cen Sen were the most outstanding representatives of "the frontier poem faction".with a kind of fresh and lively life content and vivid art style,they described a grand frontier scene and the arduous army life ,overflowing the matchless pillion to the grand rivers and mountains in our mmotherland,and arousing people's passion and yeam to the frontier.

摘 要：高適、岑参是"边塞诗派"最杰出的代表，他们以一种鲜活的人生内容和靓丽的艺术风格，描写了雄奇的边塞风光、火热艰辛的军旅生活，洋溢着对祖国大好河山无比热爱的真挚情感，激起人们对祖国边疆的热爱和向往。

Analysis results on townships and villages general statuses showed township health center and village clinic are the major health care facilities in rural poor areas. The number of staff in 36 THCs and 104 VCs were a little lower than the national average. In township health centers, 59. 9% staff are with primary or without any professional titles and 35. 9% of the total staff have no professional degrees. The average gross value of fixed assets per THC is 186000 yuan, among which special equipment values 41000 yuan. Among professional buildings 43. 3% of total area were dangerous. Only one THC can provide emergent service. 47. 2% THCs be able to diagnose and deal with common emergent stomachache. The provision of health services was lower than average level of national rural areas. Frontier Model analysis showed regression coefficients of total outpatient emergency service, total inpatients, average personnel income, number of total staff, number of doctors and technical index were all larger and positive. It meant that these variables would contribute more to the cost-frontier, and their increase would cause the total health cost rising. So increasing health service provision, improving service quality and functions of health facilities may be the best ways to increase efficiency of these facilities. Also the model showed THC inefficiency eu was 1. 68, which means 40% of the cost wasted. Apart from internal and external factors, residents'health care utilization deficiency and inequity is one of major factors causing inefficiency eu.

乡、村基本情况结果表明，农村贫困地区乡卫生院和村卫生室是农民就近就医的主要场所；36所乡卫生院以及104所村卫生室的人员数量，略低于全国同期农村平均水平；在乡卫生院中，初级职称和无职称者的比例占59.9％，无专业学历者占35.9％；平均每院固定资产总值18.6万元，其中专用设备4.1万元，业务用房中危房面积占43.3％；36所卫生院中，具备急救条件的只有1所，能诊断和处理常见急腹症的占47.2％；卫生服务提供量均低于全国农村平均水平；Frontier模型方法显示，总门诊人次、总出院人次、平均人员工资、人员总数、医生数和技术指数等指标的回归系数较大，且均为正数，即这些变量对"前沿"成本的贡献较大，其正向变化均会带来卫生服务总成本的增加，表明增加卫生服务提供量，提高质量以及完善机构服务功能，是提高乡卫生机构效率的有效途径；同时Frontier模型结果显示，卫生院的低效率〓为1.68，经换算即40％的成本处于浪费状态；影响乡卫生院低效率〓的因素有外部和内部的，而需方卫生服务不公平及利用不足是其主要因素之一。

After the winding up of the 10-year long first-phase of the nation-wide land frontier defense infrastructure construction, the overall capability of patrolling roads and frontier wire entanglement have been extended to 20,000 kilometers, and the fast response and emergency handling capabilities of the frontier defense troops have been improved greatly.

历时10年的第一步大规模陆地边防基础设施建设完成后，边防巡逻路、边境铁丝网等基础设施建设达到2万公里，边防部队快速反应和处置突发事件能力明显提高。

Come on, Happy family get a dog, frontier fun . Old Yeller is a Disney movie, which takes place in a small town in frontiern.

frontier fun 并不是一个固定的词组，这里Phoebe的话涉及了电影发生的地方，是美国得克萨斯州边界地方发生的事情。

Because it uses maintenance parts, the rechristened Lancelot Frontier's performance is inferior to the original Lancelot, but it is still an exceptional unit.

使用。因为使用后备零件来制造，Lancelot Frontier这台实验机体的性能不如原来的Lancelot。

Taking Chongqing as a case of study, this paper analyzes how the index will be selected, applies the software of Frontier Analyst 3 to demonstrate how the natural gas supplydemand is being kept in good balance quarterly in recent years and evaluate this builtup urban gas supplydemand warning system.

以重庆市为例，分析了指标选取的依据，用Frontier Analyst 3软件对重庆市近几年每个季度天然气供需的安全性做了实证分析，并对建立的供需预警协调系统进行评价。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。