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The circumstances under oil wells have been much more complex than ever . Requests on resistance of erosion destructibility of sealing interfaces that related to sealing up and cementing exercises in petroleum engineering are more and more of rigidi ty .

目前国内许多油田已进入开发后期,开采强度不断增大,井下情况更加复杂,对于石油工程中的固井和挤堵作业涉及的封固界面的抗冲蚀破坏性能要求越来越高,迫切需要解决影响界面胶结质量的各种问题,特别是流体渗流条件下的界面胶结强度的建立和保持问题。

The research result shows that the flowability, moldability, cohesiveness of high performance concrete of hill sand are significant by comparison with ordinary concrete on mechanical properties, long term properties, and durability. Motar flowability decreases with the increase of single-mixed active additive. The flowability can be largely improved by double mixing of active additive and super plasticizer NF. This is because not only the active additive has filling effect but also the dispersing effect induced by surface action between additive and super plasticizer NF. And the optimal content of materials are: super plasticizer NF≥0.8%, fly ash 20%, PS 20~30%,zeolite powder≤20%,SF 5~8%; The negative influence of hill sand powder should be avoided by controlling of powder content and the use of active additive and super

研究表明:随着单掺活性掺合料掺量的增加,砂浆流动性减小,活性掺合料与萘系高效减水剂NF双掺使用,比使用同样剂量萘系高效减水剂NF的基准浆体流动性明显增大,这是由于玻璃体材质活性掺合料不仅有填充效应,更主要的是它与高效减水剂之间的表面物化作用产生了分散性,而活性掺合料对浆体的流化作用效果主要是依赖于其分散性;能有效改善胶砂流动性的适宜掺量为:萘系高效减水剂不小于0.8%,粉煤灰掺量为20%,PS掺量为20~30%,沸石矿粉掺量不宜大于20%,SF掺量为5~8%;通过对粉末含量的限制,并借助活性掺合料、高效减水剂的合理使用,就可以避免山砂粉末含量的负面影响,配制出密实度高,抗渗性能优异,具有良好的耐久性能,并具有良好的体积稳定性的山砂高性能混凝土。

It is obviously that the content of water of soils could influence the growth of plant and the physical character of soils. With the planting salt-enduring plants, mucosity of soils getting more reduced and porosity of soils getting more improved.

种植耐盐植物后的土壤中的含水量有明显提高,这主要是由于耐盐植物植入后,土壤的物理性质发生了相应的改变,土壤中粘粒减少,土壤孔隙状况比较好,使水分有较高的入渗率,这也是水分在改良后的土壤中积聚起来的一个原因。

Pius the appropriate transient high-voltage pulse to the human skin, one temporary reversible hydrophile channels can be formed in the dual-layer Lipid membrane, it can accelerate active components to infiltrate perfectly.

用一个瞬态脉冲技术,将适当的瞬态高电压脉冲加在人体皮肤上,便可在细胞膜脂质双分子层形成暂时的可逆的亲水性通道,从而增加细胞及细胞膜的渗透性,对活性成分达到理想的促渗效果。

Pius the appropriate transient high-voltage pulse to the human skin,one temporary reversible hydrophile channels can be formed in the dual-layer Lipid membrane, it can accelerate active components to infiltrate perfectly.

用一个瞬态脉冲技术,将适当的瞬态高电压脉冲加在人体皮肤上,便可在细胞膜等脂质双分子层形成暂时的可逆的亲水性通道,从而增加细胞及组织膜的渗透性,对活性成分达到理想的促渗效果。

On the basis of the preparation of special-grade sodium hypophosphite by one-step method in the high-speed reactor,the produced sodium hypophosphite and the byproduct calcium phosphite were further converted to higher-purity hypophosphorous acid and phosphorous acid products by ionic membrane electrodialysis.

在作者开发的高速反应器一步法制专用级次磷酸钠的基础上进一步将生成的次磷酸钠和副产的亚磷酸氢钙用离子膜电渗析法制成纯度更高的次磷酸及亚磷酸产品,产品质量升级,回收利用了副产亚磷酸氢钙,并减少了原料烧碱的用量。

The result shows that well developed microbiotic crust results in less invalidation precipitation than sandy soil, but sandy soil conserves 18% precipitation in deeper layer when the soil covered with microbiotic crust had been dry completely.

结果表明,结皮和流沙地表的蒸发速率随时间的变化趋势基本相同,但在不同的蒸发阶段具有各自不同的特点,总的说来,发育良好的苔藓结皮导致相对较少的无效降水,但在更长的时间维持较高的蒸发速率;流沙和初步发育的降尘结皮导致了较多的无效降水,但由于降水的入渗深度相对较深,需要更长的时间完成蒸发过程。

The generating reason,response characteristic and distributing rule of remaining oil was deeply studied aiming at water-flooded continental reservoir with characteristic of intense heterogeneity,high water-cut,low recovery efficiency,complex distributing rule of mobile remaining oil,intergrowth of major and untabulated formation . At the same time,a systemic method of evaluation and predicating remaining oil and pressure was put forward basing on the theory of development geology,seepage flow mechanics,fluid mechanics which resolved the hard technologic problem of predicting remaining oil and pressure.

本文针对陆相注水开发油藏具有非均质性强、含水率高、原油采收率低、可采剩余油分布复杂、主力产层和表外产层同时存在等特点,深入研究了剩余油的形成机理、响应特征和分布规律,应用开发地质学、渗流力学、流体力学和地质统计学理论,将静态地质数据和动态开发数据相结合,综合现有的与剩余油及压力分布有关的所有资料,提出了一套系统的评价和预测剩余油及压力的方法,较好地解决了目前剩余油与压力评价和预测中的技术难题。

On the basis of the behavior of three CFRDs in China and Campos Novos CFRD in Brazil, the authors put forward three questions to need to be solved now on seepage control: first,segregation between face slab and bedding layer;second, the optimization design of material of bedding layer;third, the drainage design problemes of the CFRD.

根据国内3座坝和巴西的坎泼斯诺沃斯及其他几座坝的运行性状,从渗流控制的角度提出了高面板堆石坝当前需要研究的面板与垫层的脱开问题、垫层料的优化设计问题以及砂砾石面板坝的排水设计问题,并提出了相应的研究途径。

Blood came out form under the fingernails of both his and the negro's hands and they looked each other in the eye and at their hands and forearms and the bettors went in and out of the room and sat on high chairs against the wall all watched.

血从他和黑鬼子的指甲里渗了出来,他们互相瞪着对方的眼睛,手和胳膊,打赌的人在屋里进进出出的,或坐在靠墙的高椅子上观察这场比赛。

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Plunder melds and run with this jewel!

掠夺melds和运行与此宝石!

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻,也许正是在通往天国的路上,我体验着这白色的晕旋。

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单击"保存"会将文件保存到主持人的硬盘或服务器上,而不是您自己的计算机上。