资源类型

期刊论文 979

年份

2023 69

2022 77

2021 63

2020 71

2019 48

2018 43

2017 42

2016 41

2015 49

2014 43

2013 38

2012 41

2011 36

2010 49

2009 45

2008 36

2007 35

2006 28

2005 26

2004 20

展开 ︾

关键词

数学模型 13

模型试验 9

数值模拟 8

模型 7

不确定性 5

COVID-19 4

GM(1 3

计算机模拟 3

1)模型 2

DX桩 2

D区 2

Preissmann格式 2

SARS 2

TRIZ 2

Weibull分布 2

k-ε模型 2

不确定性评估 2

临震信号 2

云模型 2

展开 ︾

检索范围：

排序： 展示方式：

Influence of welding residual stresses on the ductile crack growth resistance of circumferentially cracked pipe

Xiaobo REN, Odd M. AKSELSEN, B?rd NYHUS, Zhiliang ZHANG

《结构与土木工程前沿（英文）》 2012年 第6卷 第3期   页码 217-223 doi: 10.1007/s11709-012-0169-3

摘要： Welding residual stress is one of the main concerns for fabrication and operation of steel structures due to its potential effect on structural integrity. This paper focuses on the effect of welding residual stress on the ductile crack growth resistance of circumferentially cracked steel pipes. Two-dimensional axi-symmetry model has been used to simulate the pipe. Residual stresses were introduced into the model by using so-called eigenstrain method. The complete Gurson model has been employed to calculate the ductile crack growth resistance. Results show that residual stresses reduce the ductile crack growth resistance. However, the effect of residual stresses on ductile crack growth resistance decreases with the increase of crack growth. The effect of residual stress has also been investigated for cases with different initial void volume fraction, material hardening and crack sizes.

关键词： residual stress     ductile crack growth resistance     complete Gurson model     eigenstrain method    

HTML PDF 收藏

Research progress and prospects of complete ammonia oxidizing bacteria in wastewater treatment

《环境科学与工程前沿（英文）》 2022年 第16卷 第9期 doi: 10.1007/s11783-022-1555-2

摘要：

• Comammox bacteria have unique physiological characteristics.

关键词： Complete ammonia oxidizing (comammox) bacteria     Nitrogen cycle     Physiological characteristics     Wastewater treatment    

HTML PDF 收藏

Integration of microbial reductive dehalogenation with persulfate activation and oxidation (Bio-RD-PAO) for complete

《环境科学与工程前沿（英文）》 2022年 第16卷 第2期 doi: 10.1007/s11783-021-1457-8

摘要：

•Bio-RD-PAO can effectively and extensively remove organohalides.

关键词： Bio-RD-PAO     Microbial reductive dehalogenation     Persulfate     Organohalide respiration     Complete attenuation    

HTML PDF 收藏

Complete oxidation of methane on CoO-SnO catalysts

Xingfu TANG , Jiming HAO , Junhua LI ,

《环境科学与工程前沿（英文）》 2009年 第3卷 第3期   页码 265-270 doi: 10.1007/s11783-009-0019-2

摘要： CoO-SnO hybrid oxides were prepared by the coprecipitation method and were used to oxidate methane (CH) in presence of oxygen. The CoO-SnO with a molar ratio of Co/(Co+Sn) at 0.75 exhibited the highest catalytic activity among all the CoO-SnO hybrid oxides. Experimental results showed that the catalysts were considerably stable in the CH combustion reaction, and were verified by X-ray photoelectron spectra (XPS). It was found that CoO was the active species, and SnO acted as a support or a promoting component in the CoO-SnO hybrid oxides. The surface area was not a major factor that affected catalytic activity. The hydrogen temperature-programmed reduction (H-TPR) results demonstrated that the interaction between cobalt and tin oxides accelerated the mobility of oxygen species of CoO-SnO, leading to higher catalytic activity.

关键词： Co3O4-SnO2     complete oxidation     methane (CH4)    

HTML PDF 收藏

Porous silica synthesis out of coal fly ash with no residue generation and complete silicon separation

《环境科学与工程前沿（英文）》 2023年 第17卷 第9期 doi: 10.1007/s11783-023-1712-2

摘要：

● Both amorphous and crystalline silicon are completely separated from coal fly ash.

关键词： Coal fly ash     Alkali fusion     Micro-/meso-porous Si     Zeolite MCM-48     Crystalline transformation    

HTML PDF 收藏

Synthesis of methanol and ethanol over CuZnAl slurry catalyst prepared by complete liquid-phase technology

Wei HUANG, Linmei YU, Wenhui LI, Zhili MA

《化学科学与工程前沿（英文）》 2010年 第4卷 第4期   页码 472-475 doi: 10.1007/s11705-010-0525-6

摘要： A new method, named the complete liquid-phase technology, has been applied to prepare catalysts for methanol synthesis. Its main innovative thought lies in preparing slurry catalysts directly from raw solution. Activity tests indicate that the CuZnAl slurry catalyst prepared by the new method can efficiently catalyze conversion of syngas to ethanol in a slurry reactor, while CO conversion reaches 35.9% and ethanol selectivity is more than 20%, with a total alcohol selectivity of more than 87%. No deactivation was found during the 192 h reaction .

关键词： methanol     slurry     ethanol     complete liquid-phase technology     CuZnAl catalyst    

HTML PDF 收藏

Existence of complete band gaps in 2D steel-water phononic crystal with square lattice

Cunfu HE, Huanyu ZHAO, Ruiju WEI, Bin WU

《机械工程前沿（英文）》 2010年 第5卷 第4期   页码 450-454 doi: 10.1007/s11465-010-0105-y

摘要： This paper theoretically and experimentally studies the existence of complete band gaps in two-dimensional (2D) phononic crystal consisting of parallel steel rods in water with square lattice. The band structure of phononic crystal is calculated by a plane wave expansion (PWE) method. Based on the well-known ultrasonic immersion transmission technique, the overlapping transmission spectra of acoustic waves, a complete band gap, is experimentally measured along the two high-symmetry directions of the first irreducible Brillouin zone. There is a very good agreement between the experimental result and the range of frequencies of the complete band gap.

关键词： phononic crystal     plane wave expansion (PWE) method     experimental study    

HTML PDF 收藏

Nanostructured gold films exhibiting almost complete absorption of light at visible wavelengths

Hanbin Zheng, Christine Picard, Serge Ravaine

《化学科学与工程前沿（英文）》 2018年 第12卷 第2期   页码 247-251 doi: 10.1007/s11705-018-1710-2

摘要： Nanostructured metal surfaces have been known to exhibit properties that deviate from that of the bulk material. By simply modifying the texture of a metal surface, various unique optical properties can be observed. In this paper, we present a simple two step electrochemical process combining electrodeposition and anodization to generate black gold surfaces. This process is simple, versatile and up-scalable for the production of large surfaces. The black gold films have remarkable optical behavior as they absorb more than 93% of incident light over the entire visible spectrum and also exhibit no specular reflectance. A careful analysis by scanning electron microscopy reveals that these unique optical properties are due to their randomly rough surface, as they consist in a forest of dendritic microstructures with a nanoscale roughness. This new type of black films can be fabricated to a large variety of substrates, turning them to super absorbers with potential applications in photovoltaic solar cells or highly sensitive detectors and so on.

关键词： nanostructuration     light absorption     coating     gold     electrodeposition     anodization    

HTML PDF 收藏

薄煤层刨煤机成套装备关键技术研究

宋秋爽

《中国工程科学》 2011年 第13卷 第11期   页码 33-38

摘要：

针对薄煤层安全、经济开采这一世界性难题，分析我国薄煤层资源分布以及开采技术现状，提出我国刨煤机成套装备系统所存在的技术问题，通过对成套装备关键技术的分析及研究，提出技术解决方法和途径，为刨煤机的自动化工作面提供技术支持。

关键词： 刨煤机成套装备     定向定量推移     异构地质     自适应控制    

HTML PDF 收藏

A complete modeling and simulation of DFIG based wind turbine system using fuzzy logic control

Abdelhak DIDA,Djilani BENATTOUS

《能源前沿（英文）》 2016年 第10卷 第2期   页码 143-154 doi: 10.1007/s11708-016-0402-1

摘要： The current paper talks about the variable speed wind turbine generation system (WTGS). So, the WTGS is equipped with a doubly-fed induction generator (DFIG) and two bidirectional converters in the rotor open circuit. A vector control (VC) of the rotor side converter (RSC) offers independent regulation of the stator active and reactive power and the optimal rotational speed tracking in the power maximization operating mode. A VC scheme for the grid-side converter (GSC) allows an independent regulation of the active and reactive power to exchange with the grid and sinusoidal supply currents and keeps the DC-link voltage constant. A fuzzy inference system (FIS) is adopted as an alternative of the conventional proportional and integral (PI) controller to reject some uncertainties or disturbance. The performances have been verified using the Matlab/Simulink software.

关键词： wind turbine generation system (WTGS)     doubly-fed induction generator (DFIG)     maximum power point tracking (MPPT)     vector control (VC)     fuzzy logic controller (FLC)    

HTML PDF 收藏

全新产品的创意生成方法分析

师爱芬,谢建华

《中国工程科学》 2002年 第4卷 第11期   页码 89-93

摘要：

从社会和顾客的需要入手，研究了全新产品创意的生成技术及流程图，并分析了“会飞的机器”的创意生成方法和过程，探索了全新产品创意生成的内在规律性。文章首先确定所要构思“产品”的主要特征,再依据物元的蕴含性找到根本特征，进一步寻找具备这些特征的事物和量值。根据事物、特征、量值之间的相依关系按照一定的原理进行组合得出一个系统集合，对这个系统集合进行修整、完善、优化，得出全新产品创意集合。

关键词： 全新产品     创意     物元     物元的蕴含性    

HTML PDF 收藏

Research on Microelectromagnetic Relays

LI De-sheng, LIU Ben-dong

《机械工程前沿（英文）》 2006年 第1卷 第1期   页码 111-114 doi: 10.1007/s11465-005-0013-8

摘要：

A new microelectromagnetic relay is presented and fabricated based on micromachining technology, aiming at the miniaturization and high manufacturing efficiency of electromagnetic relays. This microrelay is composed of a lower magnetic circuit, a planar exciting coil, and an upper magnetic armature. A complete magnetic circuit is composed, and the ON and OFF states are controlled by the current of the exciting coil. The dimension of this microrelay is 5 mm ? 5 mm ? 0.4 mm. The fabrication process mainly includes lithography, sputtering, electroplating, etching, sacrifice-layer technology, etc. Electromagnetic force is calculated theoretically. The calculation results are used for the optimization design of the armature and the number of turns of the exciting coil. A microelectromagnetic relay is fabricated and the initial test results are given. The resistance of the exciting coil is about 300 Ω. The switch-on state resistance is about 1.7 Ω at an exciting current of about 50 mA.

关键词： sacrifice-layer technology     OFF     complete     microelectromagnetic     Electromagnetic    

HTML PDF 收藏

Prognostic analysis of chronic myeloid leukemia in Chinese population in an imatinib era

null

《医学前沿（英文）》 2012年 第6卷 第2期   页码 204-211 doi: 10.1007/s11684-012-0202-x

摘要：

We evaluated the outcomes of chronic myeloid leukemia (CML) patients in three clinical phases, namely, chronic (CP), accelerated (AP), and blast (BP) phases, receiving imatinib treatment. The single-institution treatment experiences of Chinese patients with CML were presented. A total of 275 CML patients (CP, 210; AP, 24; and BP, 41) who received imatinib between February 2001 and April 2008 were enrolled in this study. We evaluated the responses (hematologic, cytogenetic, and molecular), overall survival (OS), treatment event-free survival (EFS), and prognostic factors of outcome. At the cut-off point, the complete cytogenetic response (CCyR) and complete molecular response rates of patients in the CP were 84.7% and 61.9%, respectively, which were significantly higher than those of patients in the AP (50% and 29.1%, respectively, both P<0.001) and BP (24.3% and 9.7%, respectively, both P<0.001). The estimated five-year OS and five-year EFS rates were 93.2% and 86.4% for CP patients, as well as 64.5% and 50.9% for AP patients, which were significantly higher than those for BP patients (P<0.001). In CP patients, univariate analysis revealed that early treatment with imatinib, achieving CCyR within 12 months, additional cytogenetic abnormalities, and kinase domain mutations were associated with the treatment outcome. More patients are needed to carry out multivariate analysis.

关键词： imatinib     chronic myeloid leukemia     complete cytogenetic response    

HTML PDF 收藏

Venetoclax and low-dose cytarabine induced complete remission in a patient with high-risk acute myeloid

Bingshan Liu, Roshni Narurkar, Madhura Hanmantgad, Wahib Zafar, Yongping Song, Delong Liu

《医学前沿（英文）》 2018年 第12卷 第5期   页码 593-599 doi: 10.1007/s11684-018-0635-y

摘要：

Conventional combination therapies have not resulted in considerable progress in the treatment of acute myeloid leukemia (AML). Elderly patients with AML and poor risk factors have grave prognosis. Midostaurin has been recently approved for the treatment of FLT-3-mutated AML. Venetoclax, a BCL-2 inhibitor, has been approved for the treatment of relapsed and/or refractory chronic lymphoid leukemia. Clinical trials on applying venetoclax in combination with cytarabine and other agents to treat various hematological malignancies are currently underway. Here, we present a case of a male patient with poor performance status and who developed AML following allogeneic hematopoietic stem cell transplant for high-risk myelodysplasia. The patient with high risk AML achieved complete response to the combined treatment regimen of low-dose cytarabine and venetoclax. Furthermore, we reviewed current clinical trials on the use of venetoclax for hematological malignancies.

关键词： venetoclax     cytarabine     AML     leukemia    

HTML PDF 收藏

具有任意有限延迟耦合布尔网络的完全同步 Research Articles

Jie LIU, Lulu LI, HabibM. FARDOUN

《信息与电子工程前沿（英文）》 2020年 第21卷 第2期   页码 281-293 doi: 10.1631/FITEE.1900438

摘要： 研究耦合延迟布尔网络完全同步性问题。文中所讨论的耦合延迟布尔网络模型中，状态延迟和输出延迟可能不相等，并且每个布尔网络中的状态延迟也可能不相等。基于矩阵半张量积获得耦合延迟布尔网络达到完全同步的充要条件。提供解决耦合延迟布尔网络完全同步性的有效算法。最后，通过数值算例说明该算法的有效性。

关键词： 布尔网络；同步性；时滞    

HTML PDF 收藏

标题 作者 时间 类型 操作

Influence of welding residual stresses on the ductile crack growth resistance of circumferentially cracked pipe

Xiaobo REN, Odd M. AKSELSEN, B?rd NYHUS, Zhiliang ZHANG

期刊论文

Research progress and prospects of complete ammonia oxidizing bacteria in wastewater treatment

期刊论文

Integration of microbial reductive dehalogenation with persulfate activation and oxidation (Bio-RD-PAO) for complete

期刊论文

Complete oxidation of methane on CoO-SnO catalysts

Xingfu TANG , Jiming HAO , Junhua LI ,

期刊论文

Porous silica synthesis out of coal fly ash with no residue generation and complete silicon separation

期刊论文

Synthesis of methanol and ethanol over CuZnAl slurry catalyst prepared by complete liquid-phase technology

Wei HUANG, Linmei YU, Wenhui LI, Zhili MA

期刊论文

Existence of complete band gaps in 2D steel-water phononic crystal with square lattice

Cunfu HE, Huanyu ZHAO, Ruiju WEI, Bin WU

期刊论文

Nanostructured gold films exhibiting almost complete absorption of light at visible wavelengths

Hanbin Zheng, Christine Picard, Serge Ravaine

期刊论文

薄煤层刨煤机成套装备关键技术研究

宋秋爽

期刊论文

A complete modeling and simulation of DFIG based wind turbine system using fuzzy logic control

Abdelhak DIDA,Djilani BENATTOUS

期刊论文

全新产品的创意生成方法分析

师爱芬,谢建华

期刊论文

Research on Microelectromagnetic Relays

LI De-sheng, LIU Ben-dong

期刊论文

Prognostic analysis of chronic myeloid leukemia in Chinese population in an imatinib era

null

期刊论文

Venetoclax and low-dose cytarabine induced complete remission in a patient with high-risk acute myeloid

Bingshan Liu, Roshni Narurkar, Madhura Hanmantgad, Wahib Zafar, Yongping Song, Delong Liu

期刊论文

具有任意有限延迟耦合布尔网络的完全同步

Jie LIU, Lulu LI, HabibM. FARDOUN

期刊论文