资源类型

期刊论文 579

会议视频 12

年份

2024 1

2023 40

2022 37

2021 52

2020 27

2019 30

2018 43

2017 42

2016 17

2015 24

2014 32

2013 16

2012 17

2011 25

2010 33

2009 24

2008 31

2007 26

2006 14

2005 9

展开 ︾

关键词

过程强化 6

优化 4

智能制造 4

不确定性 3

人工智能 3

DSM(设计结构矩阵) 2

三塔两跨悬索桥 2

三峡工程 2

主缆 2

催化剂 2

催化裂化 2

凝固过程 2

大规格 2

层次分析法 2

工程管理 2

废水 2

智能优化制造 2

机器学习 2

流程工业 2

展开 ︾

检索范围:

排序: 展示方式:

Optimization of the main liming process for inulin crude extract from Jerusalem artichoke tubers

Huandong LI, Hongji ZHU, Jianjun QIAO, Junhu DU, Hua ZHANG

《化学科学与工程前沿(英文)》 2012年 第6卷 第3期   页码 348-355 doi: 10.1007/s11705-012-1295-0

摘要: A three-stage homogenate extraction was used as a new method for inulin extraction from Jerusalem artichoke tubers. Compared with the results from conventional hot water extraction, the three-stage homogenate extraction gave higher yields and caused less degradation of the inulin. The inulin crude extract was then clarified by a carbonate-precipitation method, during which three variables — the quicklime mass, the reaction temperature and the reaction time were optimized for the main liming process to give the best clarification effect. A Plackett-Burman design, the path of steepest ascent method, a Box-Behnken design and response surface methodology (RSM) were employed in the experimental design. The optimal conditions for the main liming process were determined to be 12.0 g/L, 71.4°C and 8 min. The confirmatory tests proved that the best clarification efficiency (92.74%) was achieved at these conditions and this was approximately equal to the value predicted by the model.

关键词: inulin     homogenate extraction     Jerusalem artichoke     main liming process    

The main anammox-based processes, the involved microbes and the novel process concept from the application

《环境科学与工程前沿(英文)》 2022年 第16卷 第7期 doi: 10.1007/s11783-021-1487-1

摘要:

• The PNA, denitratation/anammox, and DAMO/anammox process are reviewed together.

关键词: Anammox     Nitritation     Denitratation     Denitrifying anaerobic methane oxidation     Mainstream wastewater    

Key technological innovations in the construction of the main terminal of Beijing Daxing International

《工程管理前沿(英文)》 2022年 第9卷 第4期   页码 689-694 doi: 10.1007/s42524-022-0223-3

关键词: Beijing Daxing International Airport     main terminal     architectural technology innovation    

The main and added effects of heat on mortality in 33 Chinese cities from 2007 to 2013

《环境科学与工程前沿(英文)》 2023年 第17卷 第7期 doi: 10.1007/s11783-023-1681-5

摘要:

● The main and added effect from heat co-existed in China.

关键词: Heat     Main effect     Added effect     Mortality     Vulnerable population    

超重力环境下非金属氮掺杂石墨烯泡沫催化还原反应性能研究 Article

王志勇, 赵志建, Jesse Baucom, 王丹, Liming Dai, 陈建峰

《工程(英文)》 2020年 第6卷 第6期   页码 680-687 doi: 10.1016/j.eng.2019.12.018

摘要:

本文以硝基苯还原和亚甲基蓝降解为模型反应体系,以非金属氮掺杂石墨烯泡沫(NGF)作为三维结构式催化材料,研究了超重力环境对催化反应性能的影响。在超重力旋转圆管反应器内6484 g (g = 9.81 m·s–2)的超重力环境下,非金属催化硝基苯还原的表观速率常数是传统搅拌反应器内的6 倍。通过计算流体力学理论模拟,揭示了超重力旋转管式反应器内超重力水平较高,湍流动能比传统反应器内有显著提高,液固相表面更新速度快,提高了催化反应效率。X射线光电子能谱和拉曼光谱测试表明该催化材料组成和结构在超重力环境下的反应过程中保持稳定。在另一个模型反应体系中,非金属氮掺杂石墨烯泡沫催化亚甲基蓝降解的速率也随着超重力水平的增加而增大。这些结果表明了超重力强化非金属碳基催化材料催化还原反应的潜力。

关键词: 超重力技术     过程强化     非金属催化     碳基纳米材料     催化还原    

Construction management and technology innovation for main projects of Quanzhou Bay Bridge

Jun DU, Fangwen WENG

《工程管理前沿(英文)》 2021年 第8卷 第1期   页码 151-155 doi: 10.1007/s42524-020-0147-8

摘要: Hongtao ZHOU, Hongwei WANG, Wei ZENG. [J]. Front. Eng, 2018, 5(1): 78-87.SangHyun LEE. [J]. Front. Eng, 2017, 4(1): 35-40.Bao-long Yuan,Sheng-gang Ren,Xing Hu,Xuan-yu Yang. [J]. Front. Eng, 2016, 3(1): 24-29.Ting Gong,Jian Yang,Hao Hu,Feng Xu. [J]. Front. Eng, 2015, 2(2): 122-124.Hong-yong Liu,Yi-qi Chen,Yi Yang. [J]. Front. Eng, 2015, 2(1): 71-75.Burcu Akinci. [J]. Front. Eng, 2014, 1(3): 283-289.Mao-run Feng,Zheng-song Zhao. [J]. Front. Eng, 2014, 1(1): 42-51.

关键词: construction management     technology innovation     UHPC trestle panel    

Chaotic behavior of LNG after stratification in main stream region of storage tank

WANG Jingjing, MA Xiaoqian

《能源前沿(英文)》 2008年 第2卷 第4期   页码 514-518 doi: 10.1007/s11708-008-0076-4

摘要: A study of the chaotic behavior of liquefied natural gas (LNG) after stratification in the main stream region of a storage tank was conducted. Based on non-linear dynamics, a 2-dimensional Rayleigh-Benard convection model was developed to simulate the convection, Lorenz equations of LNG convection were deduced from conservation equations, and the Runge-Kutta method was used to solve the equations. The results showed that when = 1.33, 106 < < 1470, chaos was obtained, which meant that the velocity field and the temperature field were highly unsteady. In addition, the influence of temperature and scale factor on the solutions and the corresponding range of parameters were studied. The results revealed that the chaos in LNG convection resulted from the interaction of buoyancy and viscid forces. A small quantity of heat impacting the storage tank would lead to a strong and unstable convection of LNG in the main stream region.

关键词: Runge-Kutta     non-linear     corresponding     temperature     addition    

Multifunctional, Wearable, and Wireless Sensing System via Thermoelectric Fabrics

Xinyang He,Jiaxin Cai,Mingyuan Liu,Xuepeng Ni,Wendi Liu,Hanyu Guo,Jianyong Yu,Liming Wang,Xiaohong Qin

《工程(英文)》 doi: 10.1016/j.eng.2023.05.026

摘要: Flexible thermoelectric materials play an important role in smart wearables, such as wearable power generation, self-powered sensing, and personal thermal management. However, with the rapid development of Internet of Things (IoT) and artificial intelligence (AI), higher standards for comfort, multifunctionality, and sustainable operation of wearable electronics have been proposed, and it remains challenging to meet all the requirements of currently reported thermoelectric devices. Herein, we present a multifunctional, wearable, and wireless sensing system based on a thermoelectric knitted fabric with over 600 mm·s−1 air permeability and a stretchability of 120%. The device coupled with a wireless transmission system realizes self-powered monitoring of human respiration through an mobile phone application (APP). Furthermore, an integrated thermoelectric system was designed to combine photothermal conversion and passive radiative cooling, enabling the characteristics of being powered by solar-driven in-plane temperature differences and monitoring outdoor sunlight intensity through the APP. Additionally, we decoupled the complex signals of resistance and thermal voltage during deformation under solar irradiation based on the anisotropy of the knitted fabrics to enable the device to monitor and optimize the outdoor physical activity of the athlete via the APP. This novel thermoelectric fabric-based wearable and wireless sensing platform has promising applications in next-generation smart textiles.

关键词: Thermoelectric fabrics     Wearable device     Wireless     Multifunctional sensing system     Outdoor wearable signal monitoring    

Drug-coated balloon-only strategy for percutaneous coronary intervention of left main coronary artery

《医学前沿(英文)》 2023年 第17卷 第1期   页码 75-84 doi: 10.1007/s11684-022-0950-1

摘要: This retrospective single-center registry study included all consecutive patients who underwent percutaneous coronary intervention (PCI) for a de novo left main coronary artery lesion using drug coated-balloon (DCB)-only strategy between August 2011 and December 2018. To best of our knowledge, no previous studies of DCB-only strategy of treating de novo left main coronary artery disease, exist. The primary endpoint was major adverse cardiovascular events (MACEs) including cardiac death, non-fatal myocardial infarction, and target lesion revascularization (TLR). The cohort was divided into two groups depending on weather the lesion preparation was done according to the international consensus group guidelines. Sixty-six patients (mean age 75±8.6, 72% male), 52% of whom had acute coronary syndrome, underwent left main PCI with the DCB-only strategy. No procedural mortality and no acute closures of the treated left main occurred. At 12 months, MACE and TLR occurred in 24% and 6% of the whole cohort, respectively. If the lesion preparation was done according to the guidelines, the MACE and TLR rates were 21.2% and 1.9%. Left main PCI with the DCB only-strategy is safe leading to acceptable MACE and low TLR rates at one year, if the lesion preparation is done according to the guidelines.

关键词: drug-coated balloon     left main     high bleeding risk     predilatation     calcifield lesion     percutaneous coronary intervention    

The main achievements in the past 24 years and the prospects of mechanism research in China

ZOU Hui-jun, ZHANG Long, ZHANG Qing

《机械工程前沿(英文)》 2006年 第1卷 第3期   页码 249-259 doi: 10.1007/s11465-006-0038-7

摘要: Since 1982, the symposiums on mechanism in China has been held fifteen times. In the past 24 years, Chinese mechanism has experienced a phenomenal development. Generally, fundamental research on traditional mechanisms is enhanced; mechanism and creative design of products are closely combined; modern mechanism with advanced and new technology is opened up; and mechanism is promoted to modernization. These are manifested in the following aspects: theory research on analysis and synthesis of traditional mechanism is deeply developed; computer-aided design on mechanisms is realized vigorously; conceptual design of mechanism system and mechanical products is energetically pushed; research on robot mechanisms and its industrial application is deeply developed; research on analysis and synthesis of controllable mechanisms and compliant mechanisms are energetically carried out; research on the dynamics of mechanisms and machines is vigorously developed; and reformation of teaching contents and system of mechanism is energetically carried out. Through the above-mentioned aspects of theory research and practical application, the theoretical and academic levels of Chinese mechanism can be considered at the advanced international level. However, there are not many original and breakthrough research achievements of fundamental research in China. In the meantime, there is a larger gap in the aspect of practical application of mechanism in the country compared with advanced countries in the world.

关键词: above-mentioned     developed     Generally     reformation     breakthrough research    

Construction technology on pile foundation of No. 6 main pier in Dashengguan Yangtze Bridge

Hongbin YU , Zeping LIAN ,

《结构与土木工程前沿(英文)》 2009年 第3卷 第3期   页码 339-343 doi: 10.1007/s11709-009-0047-9

摘要: Based on pile foundation construction of No. 6 main pier, deep mudstone geological foundation and deep-water construction in Nanjing-Dashengguan Yangtze Bridge, the method of super-large-diameter bored pile in deep water is studied. The spread drill, application of PHP mud, and choice of machine are solved by adopting two machines of KTY4000 and KPG300A. Besides, the airlift reversing circulation is selected in slag discharge. The results show that this method can ensure successfully the construction of pier foundation to satisfy the demands of codes.

关键词: PHP slurry     KTY4000 drilling machine     KPG3000A drilling machine     spread drill    

Construction management and technical innovation of the main project of Hong Kong–Zhuhai–Macao Bridge

Yongling ZHU, Jinwen ZHANG, Xinglin GAO

《工程管理前沿(英文)》 2018年 第5卷 第1期   页码 128-132 doi: 10.15302/J-FEM-2018201

摘要: Design Units: CCCC Highway Consultants Co., Ltd.; China Zhongtie Major Bridge Reconnaissance & Design Institute Co., Ltd. Construction Units: China Communications Construction Company Limited Consortium; China Railway Shanhaiguan Bridge Group Co., Ltd.; Wuhan Heavy Engineering Co., Ltd.; CCCC First Harbor Engineering Company Ltd. Consortium; Guangdong Changda Highway Engineering Co., Ltd.; China ZhongTie Major Bridge Engineering Group Co., Ltd. Consortium; Chongqing Zhixiang Paving Technology Engineering Co., Ltd.; Hunan Construction Engineering Group; China Railway Electrification Bureau Group Co., Ltd. Consortium Supervision Units: China Railway Wuhan Bridge Engineering Consulting Supervision Co., Ltd. Consortium; China Classification Society Industrial Corp.; Wuhan Bridge and Building Works Supervision Co., Ltd.; Tiesiyuan (Hubei) Engineering Supervision Consulting Co., Ltd. Consortium; Xi’an Fangzhou Engineering Consulting Co., Ltd. Consortium; Guangdong Zhonggong Project Management Co., Ltd.; Chongqing Zhongyu Engineering Consultation and Supervision Co., Ltd. Consortium

关键词: Major Bridge     Zhongtie Major     Engineering Group     Bureau Group     Construction Company    

GLOBAL GENOMIC PREDICTION IN HORTICULTURAL CROPS: PROMISES, PROGRESS, CHALLENGES AND OUTLOOK

Craig HARDNER, Satish KUMAR, Dorrie MAIN, Cameron PEACE

《农业科学与工程前沿(英文)》   页码 353-355 doi: 10.15302/J-FASE-2021387

Performance analysis of solar absorption-subcooled compression hybrid refrigeration system in subtropical city

Xiangyang YE,Liming LIU,Zeyu LI

《能源前沿(英文)》 2019年 第13卷 第1期   页码 185-192 doi: 10.1007/s11708-017-0452-z

摘要: Solar absorption-subcooled compression hybrid refrigeration system is a new type of efficient and economical solar refrigeration device which always meets the demand of cooling load with the change of solar irradiance. The performance of the hybrid system is higher due to the improvement of evaporator temperature of absorption subsystem. But simultaneously, the variation of working process as well as performance is complicated since the absorption and compression subsystems are coupled strongly. Based on the measured meteorological data of Guangzhou, a subtropical city in south China, a corresponding parametric model has been developed for the hybrid refrigeration system, and a program written by Fortran has been used to analyze the performance of the hybrid system under different external conditions. As the condensation temperature ranges from 38°C to 50°C, the working time fraction of the absorption subsystem increases from 75% to 85%. Besides, the energy saving fraction also increases from 5.31% to 6.02%. The average COP of the absorption subsystem is improved from 0.366 to 0.407. However, when the temperature of the absorption increases from 36°C to 48°C, the average COP of hybrid system decreases from 2.703 to 2.312. Moreover, the working time fraction of the absorption subsystem decreases from 80% to 71.7%. The energy saving fraction falls from 5.67% to 5.08%. In addition, when the evaporate temperature increases from 4°C to 14°C, the average COP of the absorption subsystem decreases from 0.384 to 0.365. The work of the compressor decreases from 48.2 kW to 32.8 kW and the corresponding average COP of the absorption subsystem is improved from 2.591 to 3.082.

关键词: solar     absorption-subcooled     compression hybrid     dynamic simulation     performance analysis    

Effects of Decoction on plasma proteome in cirrhosis: preliminary experimental study with rats

LIU Jie, WANG Jiyao, WEI Liming, LU Ye, Jin Hong

《医学前沿(英文)》 2008年 第2卷 第1期   页码 39-44 doi: 10.1007/s11684-008-0008-z

摘要: The aim of this paper is to study the effects of Decoction on the plasma proteome in cirrhotic rats. Twenty-six male Sprague-Dawley (SD) rats were randomly divided into three groups: cirrhotic model group ( = 10), treated with CCl (CCl/olive oil: v/v = 1:1); Decoction intervention group ( = 10), treated with CCl+ Decoction; and normal control group ( = 6), treated with olive oil only. After 8 weeks, blood samples were collected from the inferior vena cava to undergo bi-dimensional electrophoresis (2DE) and analysis by PDQuest 7.3 software. Differential protein spots were cut, enzyme hydrolysis was conducted, and peptide fragments extracted from the mixture underwent mass spectrometry (MS) with MALDI-TOF-TOF-MS. The liver fibrogenesis was assessed using a digital image analysis instrument of Masson’s trichrome stained sections. The fibrosis area of the Decoction was (8.9 ± 3.7)%, significantly smaller than that of the cirrhotic model group [(12.4 ± 4.7)%, < 0.05]. Ten markedly changed protein spots were identified by MALDI-TOF-TOF-MS. Eight of the 10 proteins, including plasma glutathione peroxidase, plasma glutathione peroxidase precursor, prealbumin, haptoglobin, apolipoprotein A-IV precursor, complement C4, inter-alpha-inhibitor H4 heavy chain, and serine/threonine-protein kinase microtubule-affinity regulating kinase 1 (MARK1) were expressed very lowly in the cirrhotic model group while they were expressed highly in the Decoction group. The expression of liver regeneration-related protein LRRG03 and vimentin increased in the cirrhotic model group, and reduced in the Decoction group. Some proteins related to oxidative stress, cell proliferation and transformation have changed in the plasma of cirrhosis induced by CCl. Decoction promotes protein synthesis and plays an anti-fibrotic role by anti-oxidation and accommodation of cell proliferation and transformation.

关键词: Decoction intervention     serine/threonine-protein     underwent     Decoction     glutathione peroxidase    

标题 作者 时间 类型 操作

Optimization of the main liming process for inulin crude extract from Jerusalem artichoke tubers

Huandong LI, Hongji ZHU, Jianjun QIAO, Junhu DU, Hua ZHANG

期刊论文

The main anammox-based processes, the involved microbes and the novel process concept from the application

期刊论文

Key technological innovations in the construction of the main terminal of Beijing Daxing International

期刊论文

The main and added effects of heat on mortality in 33 Chinese cities from 2007 to 2013

期刊论文

超重力环境下非金属氮掺杂石墨烯泡沫催化还原反应性能研究

王志勇, 赵志建, Jesse Baucom, 王丹, Liming Dai, 陈建峰

期刊论文

Construction management and technology innovation for main projects of Quanzhou Bay Bridge

Jun DU, Fangwen WENG

期刊论文

Chaotic behavior of LNG after stratification in main stream region of storage tank

WANG Jingjing, MA Xiaoqian

期刊论文

Multifunctional, Wearable, and Wireless Sensing System via Thermoelectric Fabrics

Xinyang He,Jiaxin Cai,Mingyuan Liu,Xuepeng Ni,Wendi Liu,Hanyu Guo,Jianyong Yu,Liming Wang,Xiaohong Qin

期刊论文

Drug-coated balloon-only strategy for percutaneous coronary intervention of left main coronary artery

期刊论文

The main achievements in the past 24 years and the prospects of mechanism research in China

ZOU Hui-jun, ZHANG Long, ZHANG Qing

期刊论文

Construction technology on pile foundation of No. 6 main pier in Dashengguan Yangtze Bridge

Hongbin YU , Zeping LIAN ,

期刊论文

Construction management and technical innovation of the main project of Hong Kong–Zhuhai–Macao Bridge

Yongling ZHU, Jinwen ZHANG, Xinglin GAO

期刊论文

GLOBAL GENOMIC PREDICTION IN HORTICULTURAL CROPS: PROMISES, PROGRESS, CHALLENGES AND OUTLOOK

Craig HARDNER, Satish KUMAR, Dorrie MAIN, Cameron PEACE

期刊论文

Performance analysis of solar absorption-subcooled compression hybrid refrigeration system in subtropical city

Xiangyang YE,Liming LIU,Zeyu LI

期刊论文

Effects of Decoction on plasma proteome in cirrhosis: preliminary experimental study with rats

LIU Jie, WANG Jiyao, WEI Liming, LU Ye, Jin Hong

期刊论文