全文获取类型
收费全文 | 493篇 |
免费 | 34篇 |
国内免费 | 1篇 |
专业分类
电工技术 | 9篇 |
综合类 | 3篇 |
化学工业 | 174篇 |
金属工艺 | 10篇 |
机械仪表 | 9篇 |
建筑科学 | 13篇 |
矿业工程 | 1篇 |
能源动力 | 43篇 |
轻工业 | 45篇 |
水利工程 | 2篇 |
石油天然气 | 2篇 |
无线电 | 37篇 |
一般工业技术 | 72篇 |
冶金工业 | 44篇 |
原子能技术 | 7篇 |
自动化技术 | 57篇 |
出版年
2024年 | 2篇 |
2023年 | 5篇 |
2022年 | 49篇 |
2021年 | 51篇 |
2020年 | 14篇 |
2019年 | 16篇 |
2018年 | 17篇 |
2017年 | 21篇 |
2016年 | 20篇 |
2015年 | 15篇 |
2014年 | 22篇 |
2013年 | 39篇 |
2012年 | 30篇 |
2011年 | 34篇 |
2010年 | 24篇 |
2009年 | 18篇 |
2008年 | 19篇 |
2007年 | 19篇 |
2006年 | 15篇 |
2005年 | 11篇 |
2004年 | 10篇 |
2003年 | 8篇 |
2002年 | 7篇 |
2001年 | 4篇 |
2000年 | 4篇 |
1999年 | 3篇 |
1998年 | 4篇 |
1996年 | 2篇 |
1995年 | 4篇 |
1994年 | 3篇 |
1993年 | 4篇 |
1992年 | 4篇 |
1990年 | 1篇 |
1989年 | 2篇 |
1988年 | 1篇 |
1987年 | 1篇 |
1986年 | 1篇 |
1985年 | 5篇 |
1984年 | 4篇 |
1983年 | 1篇 |
1981年 | 2篇 |
1978年 | 3篇 |
1977年 | 2篇 |
1976年 | 3篇 |
1973年 | 2篇 |
1971年 | 1篇 |
1970年 | 1篇 |
排序方式: 共有528条查询结果,搜索用时 31 毫秒
21.
22.
Maj Justyna Węglewski Witold Bochenek Kamil Rogal Łukasz Woźniacka Stefania Basista Michał 《Metallurgical and Materials Transactions A》2021,52(11):4727-4736
Squeeze casting and powder metallurgy techniques were employed to fabricate AlSi12/Al2O3 composites, which are lightweight structural materials with potential applications in the automotive industry. The impact of the processing route on the material properties was studied. Comparative analyses were conducted for the Vickers hardness, flexural strength, fracture toughness, thermal conductivity, thermal residual stresses, and frictional wear. Our results show that the squeeze cast composite exhibits superior properties to those obtained using powder metallurgy.
相似文献23.
24.
Teimourian Hanifa Teimourian Amir Dimililer Kamil Al-Turjman Fadi 《The Journal of supercomputing》2022,78(4):5221-5240
The Journal of Supercomputing - In contemporary times, renewable energy reliability has been an important field of research that is combined with the Internet of Things (IoT) including the... 相似文献
25.
Magdalena Druszczyska Magdalena Godkowicz Jakub Kulesza Sebastian Wawrocki Marek Fol 《International journal of molecular sciences》2022,23(3)
Cytokine receptors are critical regulators of the antimycobacterial immune response, playing a key role in initiating and coordinating the recruitment and activation of immune cells during infection. They recognize and bind specific cytokines and are involved in inducing intracellular signal transduction pathways that regulate a diverse range of biological functions, including proliferation, differentiation, metabolism and cell growth. Due to mutations in cytokine receptor genes, defective signaling may contribute to increased susceptibility to mycobacteria, allowing the pathogens to avoid killing and immune surveillance. This paper provides an overview of cytokine receptors important for the innate and adaptive immune responses against mycobacteria and discusses the implications of receptor gene defects for the course of mycobacterial infection. 相似文献
26.
Kamil Cebulski Katarzyna Nowiska Karolina Jabloska Hanna Romanowicz Beata Smolarz Piotr Dzigiel Marzenna Podhorska-Okow 《International journal of molecular sciences》2022,23(7)
Irisin is a myokine formed from fibronectin type III domain-containing protein 5 (FNDC5), which can be found in various cancer tissues. FNDC5 and irisin levels have been poorly studied in the tumor tissues of breast cancer (BC). The aim of this study was to determine the levels of irisin expression in BC tissues and compare them to clinicopathological factors and Ki-67 and PGC-1α expression levels. Tissue microarrays (TMAs) with 541 BC tissues and 61 samples of non-malignant breast disease (NMBD; control) were used to perform immunohistochemical reactions. FNDC5 gene expression was measured in 40 BC tissue samples, 40 samples from the cancer margin, and 16 NMBD samples. RT-PCR was performed for the detection of FNDC5 gene expression. Higher irisin expression was found in BC patients compared to normal breast tissue. FNDC5/irisin expression was higher in patients without lymph node metastases. Longer overall survival was observed in patients with higher irisin expression levels. FNDC5/irisin expression was increased in BC tissues and its high level was a good prognostic factor for survival in BC patients. 相似文献
27.
Kamil Komider Katarzyna Karska Agata Kozakiewicz Monika Lejman Joanna Zawitkowska 《International journal of molecular sciences》2022,23(7)
Acute lymphoblastic leukemia (ALL) is the most common malignancy among children. Despite the enormous progress in ALL therapy, resulting in achieving a 5-year survival rate of up to 90%, the ambitious goal of reaching a 100% survival rate is still being pursued. A typical ALL treatment includes three phases: remission induction and consolidation and maintenance, preceded by a prednisone prephase. Poor prednisone response (PPR) is defined as the presence of ≥1.0 × 109 blasts/L in the peripheral blood on day eight of therapy and results in significantly frequent relapses and worse outcomes. Hence, identifying risk factors of steroid resistance and finding methods of overcoming that resistance may significantly improve patients’ outcomes. A mitogen-activated protein kinase/extracellular signal-regulated kinase (MAPK-ERK) pathway seems to be a particularly attractive target, as its activation leads to steroid resistance via a phosphorylating Bcl-2-interacting mediator of cell death (BIM), which is crucial in the steroid-induced cell death. Several mutations causing activation of MAPK-ERK were discovered, notably the interleukin-7 receptor (IL-7R) pathway mutations in T-cell ALL and rat sarcoma virus (Ras) pathway mutations in precursor B-cell ALL. MAPK-ERK pathway inhibitors were demonstrated to enhance the results of dexamethasone therapy in preclinical ALL studies. This report summarizes steroids’ mechanism of action, resistance to treatment, and prospects of steroids therapy in pediatric ALL. 相似文献
28.
Irena Kroutilov Libor Matjka Antonín Sikora Kamil Sou
ek Lubomír Sta 《应用聚合物科学杂志》2006,99(6):3669-3676
Three epoxy‐amine thermoset systems were cured at a low ambient temperature. Evolution of the reaction kinetics and molecular structure during cure at the sub‐glass transition temperature was followed by DSC and chemorheology experiments. The effect of vitrification and the reaction exotherm on curing and final mechanical properties of the epoxy thermosets was determined. Thermomechanical properties of the low‐temperature cured systems depend on the reaction kinetics and volume of the reaction mixture. Curing of the fast‐reacting system in a large volume (12‐mm thick layer) resulted in the material with Tg exceeding the cure temperature by 70–80°C because of an exothermal temperature rise. However, the reaction in a too large volume (50‐mm layer) led to thermal degradation of the network. In contrast, thin layers (1.5 mm) were severely undercured. Well‐cured epoxy thermosets could be prepared at sub‐Tg temperatures by optimizing reaction conditions. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 99: 3669–3676, 2006 相似文献
29.
For Anatolian earthquakes, there are insufficient strong motion data from rock sites to model an attenuation relationship
for Turkey. This necessitates the use of records from soil sites, which are significantly affected by amplification. In order
to include soil site data in the attenuation analyses, boreholes were drilled at 64 recording stations on soil sites. After
removing the effects of soil amplification, rock site and soil site data were combined to establish an attenuation relationship.
Various models were tested through regression analyses using moment magnitude, epicentral distance and threshold peak horizontal
ground acceleration. A new attenuation relationship is modeled for Turkey. 相似文献
30.
Kamil Kaygusuz 《Renewable & Sustainable Energy Reviews》2009,13(1):253-270
Turkey's demand for energy and electricity is increasing rapidly. Since 1990, energy consumption has increased at an annual average rate of 4.3%. As would be expected, the rapid expansion of energy production and consumption has brought with it a wide range of environmental issues at the local, regional and global levels. With respect to global environmental issues, Turkey's carbon dioxide (CO2) emissions have grown along with its energy consumption. Emissions in 2004 reached 193 million tons. States have played a leading role in protecting the environment by reducing emissions of greenhouse gases (GHGs). State emissions are significant on a global scale. CO2 and carbon monoxide (CO) are the main GHGs associated with global warming. At the present time, coal is responsible for 30–40% of the world CO2 emissions from fossil fuels. Sulfur dioxide (SO2) and NOx contribute to acid rain. Carbon assessments can play an important role in a strategy to control CO2 emissions while raising revenue. 相似文献