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Some detrimental flow such as half pressure flow will appear when stream go through the tunnel. Therefore, it can improve stress condition, increase energy dissipation effect and reduce cost of construction to set up energy dissipater at inlet of a tunnel.

在过流时隧洞中可能会出现明满流交替等一系列对结构安全不利的水流现象，因此，在隧洞进口处合理设置洞内消能工，可有效改善隧洞结构的受力状况及消能效果，同时降低工程造价。

In order to cutting down the cost, flocculation of recombined Erwinia carotovora-Eccl3B cell from broth, influence of temperature, pH and oxidants on the separation of PHB were studied; and the method which measure the molecular weight of PHB by intrinsic viscosity was also studied; furthermore, a phenomenon was found that insolubility of PHB in chloroform can be changed by pretreated at over 120℃ for the fist time, and the mechanism of this phenomenon was explored.

为了降低成本，提高生产效率，本文针对发酵法生产PHB过程中存在的，发酵液难以分离沉淀，非有机溶剂提取PHB时分子量严重降低等问题，进行了发酵液的絮凝，及温度、pH、氧化剂对提取PHB影响的研究。并对粘度法测定PHB分子量的方法进行了研究，同时，对于研究过程中发现的，加热后PHB在三氯甲烷中的溶解性变化及其原因进行了探索。

Dispatch of sina science and technology on April 10 midday message, in the light of investment square interference sends the message of concussion of cruel dispatch high level too much, when Xie Wengang just was accepting sina science and technology to connect a line, express, the person that advice does poineering work does not not hesitate all cost take money, at the same time expostulatory investor state of mind cannot too anxious.

新浪科技讯 4月10日中午消息，针对投资方干涉过多致酷讯高层震荡的消息，谢文刚刚在接受新浪科技连线时表示，忠告创业者别不惜一切代价拿钱，同时忠告投资者心态不能过于着急。

Whether it or not to improve the lubrication and dynamic performance of gear, at the same time to realize a "green lubrication" type of gear transmission of low cost, energy saving and easy maintenance by means of making use of the frication material"s lubrication performance and meshed medium"s elastic deformation?

能不能研究一种利用摩擦副材料的摩擦润滑特性和啮合介质的弹性变形，实现既能改善齿轮的润滑和动态特性的效果，又能实现低成本、节能、易维护的绿色润滑齿轮传动？

A document that The Economist has seen claims the upgrade "was necessary to preserve the value of the asset"Chris Brooks, head of communications at the OECD, says Mr Gurría had no involvement in the refurbishment, but nevertheless the cost escalation happened on his watch.

经济学家》已知的文件宣称修缮工作&是保护 OECD 财产价值的必要&。 OECD 联络机构的头， Chris Brooks ，说 Gurria 先生与修缮工程无涉，然而花费的增加确实发生在他值班的时候。

John Knudsen, senior vice president of manufacturing for the Corrugated Container division, stated, iven the competitive nature of our business with our converting customers under intense margin pressure, we need to continue to pursue a lower cost business model to better serve our customers at the best possible price.

约翰克努森，高级副总裁制造瓦楞纸集装箱司指出，揋伊文的竞争性业务的客户与我们的转换下，利润率压力，我们必须继续坚持以较低的成本经营模式，以更好地服务于我们的客户最好的价格。

Based on the researches of prehominid this thesis first discusses and analyzes on the product characteristic and the cost structure and also the factors that affecting the pricing of software. After that it gets a stage conclusion that the pricing strategy of the traditional product isn't suitable for software product. Then it analyzes the problems of the president pricing strategy of software .At last it gives an operatable and practical pricing model by the example of the ERP software product.

本篇论文在综合前人关于信息产品和软件产品定价方法的研究成果的基础上，首先对软件产品的特点、成本结构、影响软件定价的内外各种因素进行分析和理论探讨，从而得出传统的物质产品的定价方法不适用于软件产品定价这一阶段性结论；然后综合现有的软件定价方法和策略，对其存在的问题进行分析；最后运用定性分析和定量分析相结合的方法，以ERP软件为例提出一个可操作性较强的实用定价模型。

Petroleum is a nation's strategic material. With China's entry to WTO, our petrolic enterprises are facing fierce competitions at the international markets. The high cost of exploiting crude oil has severely hampered the competitiveness of our petrolic enterprises.

石油是国家重要的战略物资，加入WTO之后，我国的油田企业面临着激烈的国际竞争，原油开采成本的居高不下，严重地影响了我国油田企业的国际竞争力。

How to launch new products in the shortest time, in the best quality, at the lowest cost become the focus of competition, along with increasingly acute market competition. Whatever fruits of science and technology were transformed into competitive commodities, design work pivotally extraordinarily. Every country in the world pays attention to design work. As a result of the development and application of control technique, computer technology, applied mathematics, design means has changed rudimentary. New theory and technology of design come forth ceaselessly.

随着市场竞争日益剧烈，如何以最短的时间、最高的质量、最低的成本将产品投放市场成了竞争的焦点，任何科技成果要转化为有竞争力的商品，设计起着极其关键的作用，世界各国都十分重视设计工作，由于控制技术，计算机技术和应用数学的发展和应用，设计手段发生了根本性变化，设计新理论、新技术不断涌现，逐步地形成和创建了一系列包括脑力劳动自动化和各种人工智能为特征的现代设计方法和技术。

Concrete pump is a construction device which pumps concrete depending on the pressure in the pipe. It is able to complete horizontal and vertical transportation continuously at the same time and it has charateristics of high effiency, labor saving, low cost, long transportation distance, and high pumpage. Concrete pump is an perfect device for modern transportation, especially for the confined sites and construction fields filled with roadblock where other transportation tools cant get close to directorly.

混凝土泵是通过管道依靠压力输送混凝土的施工设备，它能一次连续地完成水平运输和垂直运输，输送效率高、劳动力省、费用低，混凝土泵运输距离长，单位时间内的输送量大，尤其对于一些工地狭窄和障碍物的施工现场，用其他运输工具难以直接靠近施工工程，混凝土泵则能有效地发挥作用，是较为理想的一种现代混凝土输送设备。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。