全文获取类型
| 收费全文 | 273篇 |
| 免费 | 6篇 |
专业分类
| 电工技术 | 7篇 |
| 化学工业 | 94篇 |
| 金属工艺 | 9篇 |
| 机械仪表 | 10篇 |
| 建筑科学 | 1篇 |
| 能源动力 | 2篇 |
| 轻工业 | 2篇 |
| 水利工程 | 3篇 |
| 石油天然气 | 6篇 |
| 无线电 | 28篇 |
| 一般工业技术 | 73篇 |
| 冶金工业 | 7篇 |
| 原子能技术 | 5篇 |
| 自动化技术 | 32篇 |
出版年
| 2024年 | 17篇 |
| 2023年 | 9篇 |
| 2022年 | 31篇 |
| 2021年 | 39篇 |
| 2020年 | 15篇 |
| 2019年 | 14篇 |
| 2018年 | 13篇 |
| 2017年 | 9篇 |
| 2016年 | 13篇 |
| 2015年 | 11篇 |
| 2014年 | 11篇 |
| 2013年 | 13篇 |
| 2012年 | 11篇 |
| 2011年 | 18篇 |
| 2010年 | 13篇 |
| 2009年 | 4篇 |
| 2008年 | 6篇 |
| 2007年 | 8篇 |
| 2006年 | 10篇 |
| 2005年 | 4篇 |
| 2004年 | 3篇 |
| 2002年 | 1篇 |
| 2000年 | 3篇 |
| 1999年 | 1篇 |
| 1998年 | 1篇 |
| 1997年 | 1篇 |
排序方式： 共有279条查询结果，搜索用时 0 毫秒
71.
Joachim Gröbner Andres Janz Artem Kozlov Djordje Mirković Rainer Schmid-Fetzer 《JOM Journal of the Minerals, Metals and Materials Society》2008,60(12):32-38
In this paper an overview of the most relevant phase diagrams is given comprising the unconventional alloying elements Sn, Ca, and Sr, in reasonable combinations with Al and Mn in Mg alloys as a basis for advanced applications. The focus is on magnesium-rich partial projections of the liquidus surface of five ternary systems, relevant to technological applications for lightweight materials. All phase diagrams are calculated from a coherent thermodynamic multicomponent database for magnesium alloys. These calculations are validated by key samples in the pertinent subsystems, including extensive ternary assessments and also quaternary work. Isothermal sections of magnesium-rich phase diagrams of alloys with constant aluminum and manganese content at 500°C and 550°C are given for the two five-component systems: Mg-Al-Mn-Ca-Sr and Mg-Al-Mn-Ca-Sn. 相似文献
72.
Artem A. Bakulin Jan C. Hummelen Maxim S. Pshenichnikov Paul H. M. van Loosdrecht 《Advanced functional materials》2010,20(10):1653-1660
Ultrafast dynamics of the hole‐transfer process from methanofullerene to a polymer in a polymer/PCBM bulk heterojunction are directly resolved. Injection of holes into MDMO‐PPV is markedly delayed with respect to [60]PCBM excitation. The fastest component of the delayed response is attributed to the PCBM–polymer hole‐transfer process (30 ± 10 fs), while the slower component (～150 fs) is provisionally assigned to energy transfer and/or relaxation inside PCBM nanoclusters. The charge generation through the hole transfer is therefore as fast and efficient as through the electron‐transfer process. Exciton harvesting efficiency after PCBM excitation crucially depends on the concentration of the methanofullerene in the blend, which is related to changes in the blend morphology. Ultrafast charge generation is most efficient when the characteristic scale of phase separation in the blend does not exceed ～20 nm. At larger‐scale phase separation, the exciton harvesting dramatically declines. The obtained results on the time scales of the ultrafast charge generation after PCBM excitation and their dependence on blend composition and morphology are instrumental for the future design of fullerene‐derivative‐based photovoltaic devices. 相似文献
73.
74.
Perovskites: A Hard Oxide Semiconductor with A Direct and Narrow Bandgap and Switchable p–n Electrical Conduction (Adv. Mater. 48/2014) 
下载免费PDF全文
下载免费PDF全文 75.
Kun LI Junjie WANG Vladislav A.BLATOV Yutong GONG Naoto UMEZAWA Tomofumi TADA Hideo HOSONO Artem R.OGANOV 《先进陶瓷(英文版)》2021,(3):565-577
Although tin monoxide (SnO) is an interesting compound due to its p-type conductivity,a widespread application of SnO has been limited by its narrow band gap of... 相似文献
76.
77.
Yadviga Radzitskaya;Artem Islamov; 《Journal of Computer Assisted Learning》2024,40(3):1154-1165
Nanolearning represents an educational methodology rooted in personalisation and the individualisation of the educational process, leveraging contemporary information technologies. Nanolearning, closely intertwined with self-regulated learning, entails an individual's capacity to plan, monitor and regulate their learning process, objectives and strategies. In nanolearning, information is presented in small, discrete fragments, necessitating students to autonomously manage their time and educational progress, thereby determining when and what to study. Nanolearning and TikTok can synergistically intersect, yielding innovative pedagogical approaches. TikTok, a popular social platform for sharing concise video clips, introduces a novel mode of information dissemination and interpersonal communication. 相似文献
78.
Nikita D. Yolshin Andrey B. Komissarov Kirill V. Varchenko Tamila D. Musaeva Artem V. Fadeev Dmitry A. Lioznov 《International journal of molecular sciences》2022,23(24)
Whole genome sequencing (WGS) is considered the best instrument to track both virus evolution and the spread of new, emerging variants. However, WGS still does not allow the analysis of as many samples as qPCR does. Epidemiological and clinical research needs to develop advanced qPCR methods to identify emerging variants of SARS-CoV-2 while collecting data on their spreading in a faster and cheaper way, which is critical for introducing public health measures. This study aimed at designing a one-step RT-qPCR assay for multiplex detection of the Omicron lineage and providing additional data on its subvariants in clinical samples. The RT-qPCR assay demonstrated high sensitivity and specificity on multiple SARS-CoV-2 variants and was cross-validated by WGS. 相似文献
79.
Ilya B. Brodsky Artem I. Fokin Aleksei A. Efremov Elena S. Nadezhdina Anton V. Burakov 《International journal of molecular sciences》2022,23(24)
Membrane trafficking in interphase animal cells is accomplished mostly along the microtubules. Microtubules are often organized radially by the microtubule-organizing center to coordinate intracellular transport. Along with the centrosome, the Golgi often serves as a microtubule-organizing center, capable of nucleating and retaining microtubules. Recent studies revealed the role of a special subset of Golgi-derived microtubules, which facilitates vesicular traffic from this central transport hub of the cell. However, proteins essential for microtubule organization onto the Golgi might be differentially expressed in different cell lines, while many potential participants remain undiscovered. In the current work, we analyzed the involvement of the Golgi complex in microtubule organization in related cell lines. We studied two cell lines, both originating from green monkey renal epithelium, and found that they relied either on the centrosome or on the Golgi as a main microtubule-organizing center. We demonstrated that the difference in their Golgi microtubule-organizing activity was not associated with the well-studied proteins, such as CAMSAP3, CLASP2, GCC185, and GMAP210, but revealed several potential candidates involved in this process. 相似文献
80.
Andreas Weu Rhea Kumar Julian F. Butscher Vincent Lami Fabian Paulus Artem A. Bakulin Yana Yaynzof 《Advanced functional materials》2020,30(5)
Despite many advances toward improving the stability of organic photovoltaic devices, environmental degradation under ambient conditions remains a challenging obstacle for future application. Particularly conventional systems employing fullerene derivatives are prone to oxidize under illumination, limiting their applicability. Here, the environmental stability of the small molecule donor DRCN5T together with the fullerene acceptor PC70BM is reported. It is found that this system exhibits exceptional device stability, mainly due to almost constant short‐circuit current. By employing ultrafast femtosecond transient absorption spectroscopy, this remarkable stability is attributed to two separate mechanisms: 1) DRCN5T exhibits high intrinsic resistance toward external factors, showing no signs of deterioration. 2) The highly sensitive PC70BM is stabilized against degradation by the presence of DRCN5T through ultrafast, long‐range energy transfer to the donor, rapidly quenching the fullerene excited states which are otherwise precursors for chemical oxidation. It is proposed that this photoprotective mechanism be utilized to improve the device stability of other systems, including nonfullerene acceptors and ternary blends. 相似文献