全文获取类型
收费全文 | 382篇 |
免费 | 2篇 |
国内免费 | 3篇 |
专业分类
电工技术 | 6篇 |
综合类 | 12篇 |
化学工业 | 198篇 |
金属工艺 | 48篇 |
机械仪表 | 9篇 |
建筑科学 | 7篇 |
矿业工程 | 11篇 |
能源动力 | 17篇 |
轻工业 | 7篇 |
水利工程 | 1篇 |
石油天然气 | 8篇 |
武器工业 | 1篇 |
无线电 | 5篇 |
一般工业技术 | 35篇 |
冶金工业 | 15篇 |
自动化技术 | 7篇 |
出版年
2023年 | 4篇 |
2022年 | 15篇 |
2021年 | 6篇 |
2020年 | 7篇 |
2019年 | 13篇 |
2018年 | 6篇 |
2017年 | 8篇 |
2016年 | 7篇 |
2015年 | 8篇 |
2014年 | 11篇 |
2013年 | 14篇 |
2012年 | 9篇 |
2011年 | 25篇 |
2010年 | 14篇 |
2009年 | 19篇 |
2008年 | 21篇 |
2007年 | 22篇 |
2006年 | 10篇 |
2005年 | 14篇 |
2004年 | 16篇 |
2003年 | 22篇 |
2002年 | 16篇 |
2001年 | 15篇 |
2000年 | 15篇 |
1999年 | 15篇 |
1998年 | 10篇 |
1997年 | 7篇 |
1996年 | 8篇 |
1995年 | 11篇 |
1994年 | 9篇 |
1993年 | 4篇 |
1992年 | 1篇 |
1991年 | 2篇 |
1988年 | 1篇 |
1984年 | 1篇 |
1982年 | 1篇 |
排序方式: 共有387条查询结果,搜索用时 15 毫秒
1.
本文从流变学的观点出发,分析粘合剂在配制及粘结过程中,反映出不同的流变特性,而粘合剂本身的流动、粘度、触变性与涂胶及其粘合的质量关系重大。 相似文献
2.
3.
金属注射成形技术进展 总被引:12,自引:0,他引:12
分析了影响金属注射成形(MIM)产业化进程的两个主要技术因素,即适合MIM要求的原料粉末的生产方法和MIM生产工艺,并概述了目前MIM技术的发展状况。 相似文献
4.
A digital imaging approach was applied to investigate mortar morphology in thin sections; in particular, the binder/aggregate ratio and the grading curve of five mortar bars were attained by digital image processing (DIP), using the Image Pro Plus 4.1 software package. The imaging procedure employed image segmentation, to extract mortar aggregate, and image filtering, to fix grain boundaries. The results show that digital image processing may be considered as an alternative method to mechanical sieving for the characterisation of mortar morphology, as it appears to be quicker and more accurate than the traditional method. However, digital image processing exhibits limits, which are discussed in the text. 相似文献
5.
C. A. Biggs C. Sanders A. C. Scott A. W. Willemse A. C. Hoffman T. Instone A. D. Salman M. J. Hounslow 《Powder Technology》2003,130(1-3):162-168
It is possible to link granulation rates to granule properties. The linkage is by multiple dimension population balance equations that, by means of simplifying assumptions, can be reduced to multiple one-dimensional (1-D) population balance equations (PBEs). Using simple physically based models, this paper demonstrates how multiple one-dimensional population balance equations can describe the results of high-shear granulation experiments of two different materials, calcium carbonate and lactose. Good agreement between experimental and simulated results was achieved enabling the granulation rates to be defined by two model parameters: the critical binder volume fraction and the aggregation rate constant. The modelling framework presented in this paper also provides a basis for the kinetic analysis of granulation experiments so that with further work, it is possible to determine the effect of process conditions and material properties on the model parameters. 相似文献
6.
Further experimental investigation based on a microscopic, or single granule, scale has been conducted to investigate the uniformity of binder composition within a given size class for high shear melt granulation. This work assesses whether there is significant non-uniformity of binder composition within size classes to warrant considering this level of detail to improving population balance modelling of high shear granulation. It is concluded that at early times in a batch granulation process there is a broad variation in binder content between individual granules and that this variation persists in granules of small size. 相似文献
7.
本研究以浮油沥青、木素塔尔油混合液和辅助材料“ZL”为主要原材料,以工厂残渣“DZ”为酯化剂暨改性剂,合成铸造用油类粘结剂TDI。其性能与合脂油相仿,某些性能优于合服粘结剂.由于这些原料都是工业下明料,来源丰富,合成工艺简单,成本低廉. 相似文献
8.
CO2/酚基树脂的合成实践 总被引:8,自引:0,他引:8
本文对CO2/酚基树脂──冷芯盒工艺用树脂的合成工艺进行了一定程度的实验研究,提出了可行的几种有机合成方法,并从理论分析入手,对该类树脂的分子结构类型进行了设计和预测。 相似文献
9.
Jernej Drofenik Robert Dominko Mogens Mogensen Stane Pejovnik 《Electrochimica acta》2003,48(7):883-889
Four types of cellulose, in particular carboxy methyl cellulose (CMC), are tested as potential binding materials in graphitic anodes for lithium ion batteries. It is shown that a minimum content of a cellulose which gives acceptable anode properties (reversible capacity>300 mA h g−1 during the first 10 cycles, irreversible loss<20%) is about 2 wt.%, which is less than in the case of conventional polymeric binders (5-10 wt.%). Kinetics of insertion-deinsertion and passivation processes seem not to be affected by the presence of cellulose. Explanation for the electrode failure at cellulose contents lower than 1 wt.% is given based on X-ray diffraction and microscopy investigations. Finally, the structure (distribution) of cellulose in the composite anode material is discussed and (indirectly) checked with a series of experiments. Most results are compared with the corresponding results obtained either with gelatin or conventional polymeric binders or both. 相似文献
10.
熔模铸造复合工艺在汽车精铸件中的应用 总被引:1,自引:4,他引:1
李海树 《特种铸造及有色合金》2003,(1):57-58
通过对熔模铸造制模、制壳工艺的分析,应用复合工艺技术代替传统工艺,铸件表面粗糙度达到Ra6.3~3.2,尺寸精度达到CT6~CT5,目前已开发60余种汽车精铸件应用复合工艺生产,全部取消机械加工,每年为东风汽车公司节约制造成本200余万元。工艺改进包括调整石蜡-硬脂酸模料的成分,提高压蜡压力,采用硅熔胶-水玻璃复合型壳工艺等。 相似文献