Before the regulation test of water and sediment the action of flow from the Yellow River is very weak and the sand bar in the river mouth is eroded mainly by the tide for a long time and gradually turns to a new balance .

调水调沙试验前河口径流作用 微弱，河口 沙嘴长时间主要受潮流侵蚀作用逐渐向临界平衡状态调整。

In order to resolve the weak collapsibility of silicate bonded sand in foundry industry this paper applies on offline quality management gets the best prescription related to sand using in factories to resolve the problem of cleaning sand .

为解决铸造行业水玻璃 砂溃散性 差的问题，可应用线外质量管理法对其进行研究，找出与工厂用砂有关的最佳配方，使水玻璃砂铸件的清砂问题得到解决。

The reservoir heterogeneity is strong . The interformational heterogeneity displays well-developed interbeds and weak vertical continuity . A series of sand bodies are composed of several cycles . Silt or mud interbedding usually exists between cycles which cause weak continuity .

储层非均质性强，层间非均质性表现为夹层发育，垂向连续性 差，一套 砂体纵向上由几个旋回组成，旋回之间往往是粉砂岩或泥岩夹层，导致连通性差。

E. Due to favorable condition of soil moisture weak activity of wind and sand and low inter-specific competition intensity resulting from repeated alternation between sand dunes and inter-dunes the plant species richness and the plant species evenness are quite high in inter-dunes .

e.由于丘间地水分条件较好，受 风沙活动的影响 较小，同时由于流动沙丘和丘间地的不断更替降低了物种之间的竞争强度，就使丘间地具有较高的物种丰富度和物种均匀度。

There existed significant correlations between sand burial and the population characteristics except the population density under weak sand burial .

除 弱 沙埋条件白刺种群密度外，其他各性状都与沙埋有着显著相关关系；

Expanding the containing water of soil to boost up the speed of critical friction at the same time weak the amount of instantaneous blowing sand and the concentration of dust storm .

扩大土壤含水量增强临界摩擦速度，使得瞬时起 沙量减少， 减弱沙尘浓度。

In well Yumen Qing 2-7 due to the poor diagenetic grade and weak bonding circulation lost hole sloughing and sand setting are frequently encountered in gravel bed in the surface section ( 444 . 5 mm );

玉门青2-7井一开井段砾石层成岩性 差，胶结疏松，易引起井漏、井塌、 沉 砂；

The area where runoff and tidal current interact strongly and the hydrodynamic force becomes weak in favor of sediment subsidence is enriched area of sand and heavy mineral . 2 .

径流、潮流相互作用强烈的地方，水动力 减弱有利于泥沙的沉降，是 砂粒组分和矿物富集区。

Test Research and Calculation Analysis of Weak Foundation Treatment of Ash Dam by Sand Drain Preloading Method

砂井堆载预压法处理灰坝 软基的试验研究与计算分析

This paper illustrates the development of technique of sand production mechanism and prediction of sand production amount in weak cementation sand stone reservoir .

对 弱胶结 砂岩油藏出砂机理和出砂量预测技术的研究进展进行了综合论述。

At the river embankment of Guangji in Anqing the upper layer at the foundation part of embankment sections is weak pervious overburden and the strong pervious sand bed is in lower layers and they are typically double layer structure foundation .

安庆广济江堤部分堤段堤基上层是 弱透水覆盖层，下层是强透水 砂层，为典型的双层结构地基。

Guantao formation is a main oil bearing series . The fluvial facies deposit poor planar connectedness weak natural energy viscous crude loose cementation easy to sand flow and low productivity are characteristic of this reservoir .

馆陶组是埕岛油田的主要含油层系，油藏本身具有河流相沉积、油层平面连通差、天然能量 弱、油稠、胶结疏松、易 出 砂、产能较低等特点。

The optimum sand burial depth for the development of the population characteristics was higher under strong than under weak sand burial .

强 沙埋条件的种群各性状发育最适沙埋深度均大于 弱 沙埋条件下；

The influence of weak boundary layer on the adhesive strength of binding bridge of resin sand

弱界面层对树脂 砂粘结桥附着力的影响机理研究

Because of the weak grassland ecosystem and unreasonable utilization now 4 % of the grasslands have deteriorated the area of sand dunes has expanded and the inhabitable range of wild animals have gradually decreased .

目前因草地生态 脆弱和利用不当，已有4%草地退化， 沙地面积扩大，野生动物栖居范围也趋缩小；