全文获取类型
| 收费全文 | 233篇 |
| 免费 | 4篇 |
| 国内免费 | 1篇 |
专业分类
| 电工技术 | 1篇 |
| 综合类 | 1篇 |
| 化学工业 | 42篇 |
| 金属工艺 | 10篇 |
| 机械仪表 | 18篇 |
| 建筑科学 | 1篇 |
| 能源动力 | 4篇 |
| 轻工业 | 47篇 |
| 石油天然气 | 5篇 |
| 无线电 | 17篇 |
| 一般工业技术 | 25篇 |
| 冶金工业 | 20篇 |
| 自动化技术 | 47篇 |
出版年
| 2024年 | 2篇 |
| 2023年 | 3篇 |
| 2022年 | 9篇 |
| 2021年 | 17篇 |
| 2020年 | 12篇 |
| 2019年 | 8篇 |
| 2018年 | 14篇 |
| 2017年 | 11篇 |
| 2016年 | 16篇 |
| 2015年 | 4篇 |
| 2014年 | 20篇 |
| 2013年 | 15篇 |
| 2012年 | 9篇 |
| 2011年 | 10篇 |
| 2010年 | 9篇 |
| 2009年 | 5篇 |
| 2008年 | 6篇 |
| 2007年 | 4篇 |
| 2006年 | 4篇 |
| 2005年 | 6篇 |
| 2004年 | 1篇 |
| 2003年 | 6篇 |
| 2002年 | 10篇 |
| 1999年 | 6篇 |
| 1998年 | 3篇 |
| 1997年 | 4篇 |
| 1996年 | 3篇 |
| 1995年 | 1篇 |
| 1994年 | 1篇 |
| 1993年 | 3篇 |
| 1992年 | 2篇 |
| 1991年 | 3篇 |
| 1990年 | 2篇 |
| 1988年 | 2篇 |
| 1987年 | 3篇 |
| 1985年 | 1篇 |
| 1984年 | 1篇 |
| 1983年 | 1篇 |
| 1976年 | 1篇 |
排序方式： 共有238条查询结果，搜索用时 15 毫秒
82.
Jackie D. Renteria Sylvester Ramirez Hoda Malekpour Beatriz Alonso Alba Centeno Amaia Zurutuza Alexandr I. Cocemasov Denis L. Nika Alexander A. Balandin 《Advanced functional materials》2015,25(29):4664-4672
Thermal conductivity of free‐standing reduced graphene oxide films subjected to a high‐temperature treatment of up to 1000 °C is investigated. It is found that the high‐temperature annealing dramatically increases the in‐plane thermal conductivity, K, of the films from ≈3 to ≈61 W m?1 K?1 at room temperature. The cross‐plane thermal conductivity, K⊥, reveals an interesting opposite trend of decreasing to a very small value of ≈0.09 W m?1 K?1 in the reduced graphene oxide films annealed at 1000 °C. The obtained films demonstrate an exceptionally strong anisotropy of the thermal conductivity, K/K⊥ ≈ 675, which is substantially larger even than in the high‐quality graphite. The electrical resistivity of the annealed films reduces to 1–19 Ω □?1. The observed modifications of the in‐plane and cross‐plane thermal conductivity components resulting in an unusual K/K⊥ anisotropy are explained theoretically. The theoretical analysis suggests that K can reach as high as ≈500 W m?1 K?1 with the increase in the sp2 domain size and further reduction of the oxygen content. The strongly anisotropic heat conduction properties of these films can be useful for applications in thermal management. 相似文献
83.
Ayman M. A. Youssef Hoda A. ElMaraghy 《International Journal of Flexible Manufacturing Systems》2007,19(2):67-106
The selection of Reconfigurable Manufacturing Systems (RMS) configurations that include arrangement of machines, equipment
selection, and assignment of operations, has a significant impact on their performance. This paper reviews the relevant literature
and highlights the gaps that exist in this area of research. A novel “RMS Configuration Selection Approach” is introduced.
It consists of two phases; the first deals with the selection of the near-optimal alternative configurations for each possible
demand scenario over the considered configuration periods. It uses a constraint satisfaction procedure and powerful meta-heuristics,
real-coded Genetic Algorithms (GAs) and Tabu Search (TS), for the continuous optimization of capital cost and system availability.
The second phase utilizes integer-coded GAs and TS to determine the alternatives, from those produced in the first phase,
that would optimize the degree of transition smoothness over the planning horizon. It uses a stochastic model of the level
of reconfiguration smoothness (RS) across all the configuration periods in the planning horizon according to the anticipated
demand scenarios. This model is based on a RS metric and a reconfiguration planning procedure that guide the development of
execution plans for reconfiguration. The developed approach is demonstrated and validated using a case study. It was shown
that it is possible to provide the manufacturing capacity and functionality needed when needed while minimizing the reconfiguration
effort. The proposed approach can provide decision support for management in selecting RMS configurations at the beginning
of each configuration period.
相似文献
| Hoda A. ElMaraghy (Corresponding author)Email: |
84.
Mahsa Nazemi Gelian Hoda Mashayekhi Yoosof Mashayekhi 《International Journal of Communication Systems》2019,32(16)
Botnets have been recently recognized as one of the most formidable threats on the Internet. Different approaches have been designed to detect these types of attacks. However, as botnets evolve their behavior to mislead the signature‐based detection systems, learning‐based methods may be deployed to provide a generalization capacity in identifying unknown botnets. Developing an adaptable botnet detection system, which incrementally evolves with the incoming flow stream, remains as a challenge. In this paper, a self‐learning botnet detection system is proposed, which uses an adaptable classification model. The system uses an ensemble classifier and, in order to enhance its generalization capacity, updates its model continuously on receiving new unlabeled traffic flows. The system is evaluated with a comprehensive data set, which contains a wide variety of botnets. The experiments demonstrate that the proposed system can successfully adapt in a dynamic environment where new botnet types are observed during the system operation. We also compare the system performance with other methods. 相似文献
85.
Dr. Clare F. Megarity Dr. Hoda Abdel-Aal Bettley Dr. M. Clare Caraher Dr. Katherine A. Scott Dr. Roger C. Whitehead Dr. Thomas A. Jowitt Dr. Aldo Gutierrez Dr. Richard A. Bryce Dr. Karen A. Nolan Prof. Ian J. Stratford Prof. David J. Timson 《Chembiochem : a European journal of chemical biology》2019,20(22):2841-2849
NAD(P)H quinone oxidoreductase-1 (NQO1) is a homodimeric protein that acts as a detoxifying enzyme or as a chaperone protein. Dicourmarol interacts with NQO1 at the NAD(P)H binding site and can both inhibit enzyme activity and modulate the interaction of NQO1 with other proteins. We show that the binding of dicoumarol and related compounds to NQO1 generates negative cooperativity between the monomers. This does not occur in the presence of the reducing cofactor, NAD(P)H, alone. Alteration of Gly150 (but not Gly149 or Gly174) abolished the dicoumarol-induced negative cooperativity. Analysis of the dynamics of NQO1 with the Gaussian network model indicates a high degree of collective motion by monomers and domains within NQO1. Ligand binding is predicted to alter NQO1 dynamics both proximal to the ligand binding site and remotely, close to the second binding site. Thus, drug-induced modulation of protein motion might contribute to the biological effects of putative inhibitors of NQO1. 相似文献
86.
Sarah Lord Ferguson Leanne Ewing Alessandro Bigi Hoda Diba 《Journal of Wine Research》2019,30(2):157-165
This paper considers a sample of successful wine bloggers, and clusters them into four distinct segments that could be targeted by wine marketers in different ways. Using text that they wrote in response to being named to a survey of 100 top wine blogs, we employ an advanced textual analysis tool (LIWC) to categorize the writings according to the following characteristics: analytical thinking, clout, authenticity, and emotional tone. This data is then used in a clustering procedure that distinguishes four distinct groups of bloggers: the Analysts, the Agnostics, the Authentic Pessimists, and the Confident Optimists. 相似文献
87.
88.
Sahar Esfandyari Hoda Elkafas Rishi Man Chugh Hang-soo Park Antonia Navarro Ayman Al-Hendy 《International journal of molecular sciences》2021,22(4)
Cell–cell communication is an essential mechanism for the maintenance and development of various organs, including the female reproductive system. Today, it is well-known that the function of the female reproductive system and successful pregnancy are related to appropriate follicular growth, oogenesis, implantation, embryo development, and proper fertilization, dependent on the main regulators of cellular crosstalk, exosomes. During exosome synthesis, selective packaging of different factors into these vesicles happens within the originating cells. Therefore, exosomes contain both genetic and proteomic data that could be applied as biomarkers or therapeutic targets in pregnancy-associated disorders or placental functions. In this context, the present review aims to compile information about the potential exosomes with key molecular cargos that are dysregulated in female reproductive diseases which lead to infertility, including polycystic ovary syndrome (PCOS), premature ovarian failure (POF), Asherman syndrome, endometriosis, endometrial cancer, cervical cancer, ovarian cancer, and preeclampsia, as well as signaling pathways related to the regulation of the reproductive system and pregnancy outcome during these pathological conditions. This review might help us realize the etiology of reproductive dysfunction and improve the early diagnosis and treatment of the related complications. 相似文献
89.
Hoda Molavi Sima Hosseinpour Hossein Bahmanyar Mojtaba Shariaty‐Niasar 《加拿大化工杂志》2011,89(6):1464-1472
A rotating disc contactor with inner diameter of 91 mm and 21 compartments was used to investigate local and average static hold‐ups in the column. Three chemical systems, including distilled water as stagnant continuous phase and toluene, kerosene, and butyl acetate as dispersed phase, in case of no mass transfer, were applied. Different parameters consisting of drop size and static hold‐up were measured experimentally under various operating conditions, and two dimensionless correlations for estimation of local static hold‐up as a function of average mother drop size, physical properties, rotor speed, and stage number were proposed in two cases: (1) immovable and (2) rotating rotor discs. Furthermore, two dimensionless correlations were presented to estimate average static hold‐up as a function of average mother drop size, physical properties, rotor speed, and number of stages in the column in the two aforementioned conditions. 相似文献
90.
In this study, the physicomechanical properties and morphology evolution of irradiated (styrene butadiene rubber)/(devulcanized waste rubber)/(organically modified montmorillonite) nanocomposites were realized. The improvement in the physicomechanical properties provides a possible mechanism on how organically modified montmorillonite influences the general properties of irradiated nanocomposites. X‐ray diffraction data illustrated that there is an increase in the basal spacing of sodium montmorillonite clay due to modification and/or polymer intercalation. The results of mechanical properties showed that the as‐prepared nanocomposites have superior irradiation‐resistant properties to the (styrene butadiene rubber)/(devulcanized waste rubber) blend. J. VINYL ADDIT. TECHNOL., 24:50–57, 2018. © 2015 Society of Plastics Engineers 相似文献