The variations in trace element contents and ratios may hold up a mirror to the lake - level fluctuations and climatic changes, which, in turn, have exerted a direct and important effect on the sequence stratigraphic development. collectively, the reservoir rocks from the yanchang formation consist dominantly of the delta front subfacies subaqueous distributary channel and channel - mouth bar microfacies and delta plain subfacies subaerial distributary channel microfacies fine - grained feldspar sandstones and siltstones. the reservoir rocks have been subjected to three stages of diagenetic and porosity evolution : ( 1 ) the porosity reduction by the mechanical compaction and chemical pressure solution during the early diagenetic stage ; ( 2 ) the porosity increase by the dissolution during the a substage of the late diagenetic stage, and ( 3 ) the porosity reduction by the cementation and filling during the b substage of the late diagenetic stage
系統的儲層特徵研究表明，該區延長組儲層成因類型主要為三角洲前緣水下分流河道、河口
砂壩及三角洲平原水上分流河道微相細粒長石
砂巖、粉
砂巖；儲層巖石經歷了壓實，膠結，溶蝕等成巖作用，歷經早成巖機械壓實和化學壓溶孔隙
縮小期、晚成巖a亞期溶蝕作用孔隙擴大期及晚成巖a亞期（ b亞期）膠結充填孔隙
縮小期三個成巖-孔隙演化階段；儲層物性總體上具有較低孔滲、低孔滲的特點，孔隙類型主要為粒間溶孔、殘余粒間孔隙、粒內溶孔、晶間孔及晶間溶孔，裂縫不發育，儲集巖排驅壓力和中值壓力較高，孔隙結構類型以細小孔-微孔隙，微細喉-微喉型為主。
This thesis investigated and researched on non - loaded crack, especially those caused by thermal - shrink, and analyzed the thermal - shrink stress of beam, slab and continuous - wall, found that according data of civil and overseas offered thermal - shrink calculating formula without considering effect of factors, such as the cement quantity, using of aruhuesiru, aggregate size and quantity of sand, which made the result data smaller. in addition, there are not enough construct measure in code
本文對非荷載裂縫，特別是溫度?收
縮裂縫進行了調查研究，並對兩端或四周約束的梁、板和底部約束的地下連續墻進行了收
縮應力分析，發現國內外有關文獻給出的收
縮計算公式沒有考慮泵送商品混凝土的水泥用量、外加劑使用、骨料粒徑和
砂用量等因素的影響，計算出的混凝土收
縮量往往偏小；另外， 《規范》中針對溫度?收
縮裂縫的構造措施不足。
Break - off core
縮頸
砂心
In this paper, polyvinyl - butyral ( pvb ) and methyl cellulose ( mc ) are chosen as chemical additives to amend the property of normal mortar, orthogonal tests of 96 pieces of shear specimens are carried out, then orthogonal analysis of test results is performed
採用聚乙烯醇
縮丁醛和甲基纖維素對普通
砂漿做合理改性，進行了96個抗剪試件的正交試驗，並對試驗結果進行正交分析。
The sand in the bags has the principal task of guaranteeing continuity of contact in the material without impeding the free diffusion of the compressed air.
袋中
砂的主要目的是在保證材料的連續接觸而不妨礙壓
縮空氣的自由擴散。
Rapid prototyping technology changed the traditional pattern of product design, which could offer product sample for the designer, reduced design cycle and quicken the schedule of new product design, and it gave the decision - makers visual feeling. ; rp technology provided kinds of molds including resin - boncled mold laminate mold, investment mold and lost foam casting mold and so on for sand casting investment casting and cavityless casting, it could also use direct shell production casting to make pattern dies metal dies die - casting dies injection dies directly, and it could even produce casting products in small scales. the applications of fdm technology in plaster precision casting and the rapid casting technology based on sls technology were introduced, the organic combination between rapid prototyping tecnnology and foundry process, which initiated a new period of rapid manufacturing metal parts, by using advanced new technology alternated traditional foundry industry to make it looked brand - new, thus, the competition of foundry industry would be improved ; rapid prototyping technology offered a rapid economical feasible technical method, common processes of using rapid prototyping technology to produce dies were discussed, in the paper it explored that. the problem of combining rapid prototyping technology with electric arc metal - spraying technology to make metal dies and technics in dies manufacturing of combining rapid prototyping technology with precision casting, rapid tooling based on rapid prototyping, integrated advanced new technology and tradition technology of rapid prototyping manufacture, each superiority were exerted, rapid prototyping technology had been an efficiency measure to rapid update products and develop new product, and to middle -
快速成型技術改變了傳統的產品開發模式，可以為設計者提供產品樣件，
縮短設計周期，加快新產品的開發進度，為決策者提供直觀性；快速成型技術迅速提供
砂型鑄造、熔模鑄造、實型鑄造用的各種模樣，包括樹脂模、層壓模、熔模和消失模等，還可採用直接制殼鑄造法直接製造熔模鑄造用的壓型、金屬型、壓鑄型、注塑模，甚至直接製造小批量鑄件，介紹了熔積成型技術在石膏型精密鑄造上的應用和基於選擇性激光燒結技術的快速鑄造技術，快速成型技術與鑄造工藝的有機結合，開創了快速製造金屬零件的新階段，對用高新技術改造傳統的鑄造工業，使其面貌煥然一新，增強鑄造行業的競爭能力；快速成型技術為母模的製造提供了一條快速、經濟、可行的技術途徑，討論了利用快速成型技術製造模具的一般工藝方法，探討了將快速成型技術與金屬電弧噴鍍技術結合起來快速製造金屬模具問題，以及快速成型技術與精密鑄造技術相結合的模具製造工藝，基於快速成型製造的快速模具技術，集成了快速成型製造高新技術和傳統技術，發揮各自優勢，已成為產品快速更新換代和新產品開發及中、小批量生產的有效手段之一。
The sand box model is a reduced scale representation of the natural porous medium domain.
砂槽模型是將天然的多孔介質區域按比例
縮小的模型。
The alternative changes of paleoenvironment favored the formation and imbedding of brine, which is the source of salt - water intrusion ; and the paleochannel that formed during regressive of sea level is the path of salt - water intrusion
海進時期，大面積的濱海平原被淹沒，在近海平原窪地滯留的海水經過蒸發、濃
縮變為鹵水，成為鹹水入侵的物源；海退後陸源碎屑在濱海地區沉積形成了巨厚的古河道
砂層。
( 1 ) systematic triaxial compression tests are made for the sand reinforced by various national geosynthetics. comprehensive investigations into the interaction characteristics are also made between sand / lime fly ash and various national geosynthetics by direct shear tests and pull out tests, which can help choosing geosynthetic type and understanding the geosynthetic reinforcement mechanism ; ( 2 ) this paper is also firstly systematically presents the results of a comprehensive investigation into the interaction characteristics between lime fly ash and various national geosynthetics ; ( 3 ) by non - linear fem, the influence of the modulus of geosynthetics, the thickness of the soft ground and the width of the foundation on the effectiveness of geosynthetic reinforcement are also studied ; ( 4 ) the main conclusions are as followed : ( geotextiles are likely to be suited for projects allowing high displacement, polyester warp knitting geogrids and oriented geogrids for projects allowing medium displacement, glass fiber geogrids for projects allowing low displacement and geonets for secondary projects. ( the confining effect of fill material to act on different kinds of geosynthetics varies largely, which must be considered
（ 1 ）本文利用三軸壓
縮試驗，比較各種國產土工合成材料對
砂土的加筋效果；利用直剪試驗和拉拔試驗，比較各種國產土工合成材料與
砂土或石灰粉煤灰的界面摩擦特性，深入研究土工合成材料的加筋機理，首次明確提出加筋土工合成材料的選型原則； （ 2 ）本文首次系統地研究了石灰粉煤灰與各種國產土工合成材料的界面摩擦特性； （ 3 ）本文採用有限元法，系統研究了加筋模量、軟土地基厚度、基礎寬度等因素對土工合成材料加固軟土地基效果的影響； （ 4 ）本文主要結論如下： （無紡土工織物適合用於允許大變形的加筋土工程；滌綸纖維經編土工格柵和塑料拉伸土工格柵適合用於對變形有較嚴格要求的加筋土工程；玻璃纖維經編土工格柵適合用於對變形有嚴格要求的加筋工程；土工網適合用於低等級的加筋土工程。
Effects of amomum villosum extraction on the contraction of rabbit thoracic aorta in vitro
砂仁提取液對離體家兔主動脈條收
縮性能的影響
The holes of anchor bolts will be grouted with normal ( portland, non - shrinkage ) cement mortar
這些地腳螺孔將灌入普通（波特蘭，無收
縮）水泥
砂漿。
According to each ingredients ( water retaining admixture, polymer, inorganic mineral ) " effect to mortar ' s behaviors ( water relentivity, strength, contractility ) in exclusive mortar " s composite addition, the text defines each ingredient ' s quantity scope, then define the mix through cross experiment. we compared the aac exclusive mortar ' s behaviors such as water relentivity, compressive strength, binding strength, shrinkage, flexural strength and others to ordinary mortar ' s ones, it turn out to be that there is much improve in former ' s behaviors such as water relentivity, compressive strength, binding strength, shrinkage, flexural strength etc, it also shows that the aac exclusive mortar can improve the crack in aac brick walling to a certain degree
並根據專用
砂漿中復合外加劑的各個組分（保水劑、聚合物、無機礦物等）對
砂漿主要性能（保水性、強度、收
縮性、抗彎性等）的影響來確定每個組分的摻量范圍，再通過正交實驗確定最佳配合比，然後就普通
砂漿與專用
砂漿的保水性、抗壓強度和粘結強度、收
縮值、抗彎曲性能以及其它性能進行了對比，對比結果表明專用
砂漿的保水性、抗壓強度和粘結強度、收
縮值、抗彎曲性能以及其它性能較普通
砂漿都有了很大的提高，說明加氣混凝土砌塊專用
砂漿在一定程度上可以改善加氣混凝土砌塊墻體的開裂情況。
Abstract : using furan sand to produce heavy diesel engine block and crankshaft eliminated defects of castings including “ penetration / burn - in ”, “ shrinkage porosity ”, “ big dimension deviation ” of cylinder block, “ penetration / bum - in ”, “ misrun ” and “ run - out ” of crankshaft, and so on
文摘:樹脂
砂鑄造工藝應用於大型球墨鑄鐵件整體鑄造柴油機缸體、曲軸生產上消除整鑄缸體「粘
砂」 、 「
縮松」 、 「尺寸偏差大」及曲軸「粘
砂」 、 「澆不足」 、 「漏鐵液」等鑄造缺陷，具有明顯的效果。
In the aspect of improving the cracking feature, compatibility and flexibility, the author has done experiments, including strength, modulus of elasticity experiments, and design some experiments similar to the practical structure and circumstance including adhesion strength between fresh mortars and old ones, between mortar and polystyrene board, mortar shrinkage in concrete circle, mortar shrinkage at different strength and different polymer - cement ratio, and temperature deformability at different strength and different polymer - cement ratio on mortars, on different type of formwork and on mortars with different type of formwork
在改善
砂漿抗裂性、提高柔韌性和協調變形能力方面，進行了不同聚合物摻量的強度試驗、彈性模量試驗；設計了與模網混凝土實際結構和情況相接近的新老
砂漿粘結強度試驗、
砂漿與苯板的粘結試驗以及混凝土環中的
砂漿收
縮試驗；進行了不同強度、不同聚合物摻量下的
砂漿干
縮變形試驗、溫度變形試驗，以及不同結構形式的鋼網自身溫度變形試驗和配有鋼網的
砂漿溫度變形試驗。
To the chill climate character on neimeng region, this paper selects the suitable cement content for decreasing temperature contraction cracking on road base through the test of cement stabilized sand - gravel material
本文針對內蒙地區寒冷的氣候特點，通過水泥穩定
砂礫材料特性研究，確定了合適的水泥劑量，以減輕基層產生溫
縮裂縫。
On the basis of these results, the design method and procedure of lime - flyash grit composite were researched combining with the standard. through the engineering practice of recent ten years, some modification were made as follows : the maximum size of the granular material was improved from 4cm to 10 ~ 12cm, the mud content rises to 7 percent from 3 percent, the strength was raised, also the construction became more convenient
在此基礎上，結合規范討論了二灰穩定
砂礫材料的設計方法和步驟，並對規范中的有關規定作了如下的修正：最大石料粒徑的尺寸由4厘米增加為10 12厘米，含泥量由3提高到7等，從而提高了二灰穩定、
砂礫材料的強度，減少了干
縮性，方便了施工。
Information on the enterprise samad industrietechnik gmbh and their services, like compressors and piping systems on one hand and sand blast booths and pneumatic wall boxes on the other, is available in the firm profile
Samad industrietechnik gmbh公司積累了多年經驗，在自己的網頁上這家企業為您介紹其它的專門產品，例如關于壓縮機，管道系統，噴砂室。
