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业主 1

传输性能分析模型 1

共热解 1

分数阶系统;稳定性;中立时滞;鲁棒性;饱和性 1

区间关联函数 1

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区间距 1

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木聚糖 1

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海豚哨音;改进Merkle哈希树;安全水声通信(UWAC) 1

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片上网络;路由算法;拥塞控制;模糊逻辑 1

现场可编程门阵列(FPGA);泄漏功率;电源门控;晶体管级电路设计 1

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Research on combustion characteristics of bio-oil from sewage sludge

Rui LI, Baosheng JIN, Xiangru JIA, Zhaoping ZHONG, Gang XIAO, Xufeng FU

《化学科学与工程前沿(英文)》 2009年 第3卷 第2期   页码 161-166 doi: 10.1007/s11705-009-0057-0

摘要: Combustion characteristics of bio-oil from sewage sludge were investigated using thermogravimetry (TG) and Fourier Transform Infrared Spectroscopy (FT-IR) techniques. The combustion process could be divided into two weight loss stages. Light compounds volatilized and were oxidized in the first stage and the heterogeneous combustion between oxygen and heavy compounds happened in the second stage, which were confirmed by FT-IR technique. Most weight loss occurred in the first stage. The effect of heating rate was also studied and higher heating rates were found to facilitate the combustion process. The kinetic parameters of the two stages were calculated and the change of activation energy indicated higher heating rates benefited combustion.

关键词: bio-oil from sewage sludge     fast pyrolysis     combustion characteristics     TG-FT-IR     kinetic    

Removal of Zn

Feng XUE, Beicheng XIA, Rongrong YING, Shili SHEN, Peng ZHAO

《环境科学与工程前沿(英文)》 2013年 第7卷 第4期   页码 531-538 doi: 10.1007/s11783-013-0506-3

摘要: Biosorption of Zn from aqueous solutions by biomass of was investigated. The removal rates of Zn by under different parameters (e.g., solution pH, bio-sorbent dosage and initial Zn concentration) were studied. The inhibition of ’s biosorption by anionic ligands EDTA (Ethylene Diamine Tetraacetic Acid), acetate and citrate) implied that EDTA and citrate might be used as eluting reagents. Regular and simultaneous solution pH change and light metal ions release after biosorption indicated that an ion exchange mechanism was involved. From FT-IR (Fourier Transform Infrared) spectroscopy, the main functional groups participated in biosorption were found. Biosorption of Zn by could be well described by the Freundlich and Langmuir models. In conclusion, the biomass of showed high potential for the treatment of wastewater containing Zn .

关键词: biosorption     Agaricus bisporus     zinc     ion exchange     FT-IR     isotherms    

Establishing two-stage interaction between fly ash and NaOH by X-ray and infrared analyses

Bhagwanjee JHA,Nevin KOSHY,Devendra Narain SINGH

《环境科学与工程前沿(英文)》 2015年 第9卷 第2期   页码 216-221 doi: 10.1007/s11783-014-0630-8

摘要: The interaction of the fly ash and NaOH, in an open reflux hydrothermal system at 100°C, has been explored by several researchers and formation of fly ash zeolites has been confirmed based on the X-ray diffraction analysis of the residues. However, this method does not reveal much about the characteristic transitions (viz. elemental, electro-negativity and cation exchange capacity) of the residues. In this situation, resorting to Fourier transform-infrared radiation (FT-IR) spectroscopy on the residues obtained from two-stage hydrothermal treatment process, described in this manuscript, appears to be a novel idea to establish transitions in chemical bonds (viz., -Si-OH-Al-, OH-Na, OH-Al-), crystallinity and cation exchange capacity of these residues. Based on extensive studies, it has been demonstrated that FT-IR spectroscopy is extremely useful for 1) detection of chemical bonds in the residues, 2) evaluation of zeolites in the residues and 3) also establishing the superiority of the two-stage interaction of the fly ash with NaOH for synthesizing better fly ash zeolites (viz., Na-P1 and Hydroxysodalte) as compared to those obtained from the conventional single-stage treatment of the fly ash.

关键词: hydrothermal treatment     alkali activation     fly ash zeolites     X-ray diffraction (XRD) and Fourier transform-infrared radiation (FT-IR) spectroscopy    

Potassium carbonate-based ternary transition temperature mixture (deep eutectic analogues) for CO absorption: Characterizations and DFT analysis

《环境科学与工程前沿(英文)》 2022年 第16卷 第7期 doi: 10.1007/s11783-021-1500-9

摘要:

•Addition of hindered amine increased thermal stability and viscosity of TTTM.

关键词: Ternary transition-temperature mixture     FT-IR and thermal stability analysis     Viscosity and correlation study     Eyring’s absolute rate theory     CO2 solubility     Density functional theory (DFT).    

Study on HCl removal for medical waste pyrolysis and combustion using a TG-FTIR analyzer

Hongmei ZHU,Weiying CHEN,Xuguang JIANG,Jianhua YAN,Yong CHI

《环境科学与工程前沿(英文)》 2015年 第9卷 第2期   页码 230-239 doi: 10.1007/s11783-014-0651-3

摘要: Under both pyrolysis and combustion condition, HCl removal efficiency for medical waste with Ca-based additives was semi-quantitatively studied by means of TG-FTIR. Additionally, the difference of HCl removal efficiency for PVC and medical waste was compared. Experimental results showed that: 1) Thermal degradation of medical waste mainly took place in two steps under both pyrolysis and combustion condition; 2) HCl emitted at both two steps and HCl concentration increased with the increased of Cl ratio in the medical waste; 3) for the same additive, HCl concentration decreased with the increased of additives amount, that is to say, HCl removal efficiency of medical waste increased as the increased of Ca/Cl molar ratio. Fourth, when Ca(OH) was used as additive, HCl removal efficiency for medical waste combustion was a little higher than that for medical waste pyrolysis, but either CaCO or CaO was used as additive, it was just opposite, more specifically, when CaCO was used as additive with Ca/Cl=1.3, HCl removal efficiency was 5.49% under pyrolysis condition, but that was only 4.24% under combustion condition. Fifth, under the same Ca/Cl molar ratio, HCl removal efficiency for PVC was higher than that for medical waste under both pyrolysis and combustion condition, more specifically, when Ca(OH) was used as additive with Ca/Cl=1, HCl removal efficiency was 64.51% for PVC, but that was only 27.66% for medical waste pyrolysis with 4% Cl under pyrolysis condition.

关键词: pollution     medical waste     pyrolysis     combustion     TG-FTIR     HCl removal    

Pyrolysis behaviors of oil sludge based on TG/FTIR and PY-GC/MS

Wei SONG, Jianguo LIU, Yongfeng NIE,

《环境科学与工程前沿(英文)》 2010年 第4卷 第1期   页码 59-64 doi: 10.1007/s11783-009-0152-y

摘要: Pyrolysis is an alternative technology for oil sludge treatment. Thermogravimetric Analysis-Fourier Transform Infrared Spectroscopy and Pyrolysis-Gas Chromatography/Mass Spectrometry were employed to investigate the pyrolysis process and products of oil sludge. The pyrolysis process was divided into five stages: drying and gas desorption, oil volatilization, main pyrolysis, semi-coke charring, and mineral decomposition. The main reaction temperatures ranged from 497.6 K to 753.2 K. The products were mainly composed of pairs of alkane and alkene (carbon number ranges from 1 to 27). The mechanisms consisted of random chain scission followed by end chain scission at high temperatures with volatilization occurring during the whole process. This study is useful not only for the proper design of a pyrolysis system, but also for improving the utilization of liquid oil products.

关键词: oil sludge     pyrolysis     Thermogravimetric Analysis-Fourier Transform Infrared Spectroscopy (TG-FTIR)     Pyrolysis-Gas Chromatography/Mass Spectrometry (PY-GC/MS)    

区域水环境质量的区间可拓评价方法及应用

胡宝清

《中国工程科学》 2001年 第3卷 第6期   页码 53-56

摘要:

在区间与区间之距——IR距概念的基础上给出了相应的可拓评价方法——区间可拓评价方法,并在区域水环境质量评价中给出实例。

关键词: 区间距     区间关联函数     区间可拓评价    

工程监理委托代理关系中激励约束与参与约束的研究

秦旋

《中国工程科学》 2007年 第9卷 第4期   页码 45-49

摘要:

基于委托-代理理论对工程监理委托-代理关系中的激励约束与参与约束进行若干拓展研究,与参 与约束(IR)相比,激励相容约束(IC)更为重要,

关键词: 工程监理     业主     工程师     委托代理     激励相容约束     参与约束    

用于设计量子点元胞自动机算术电路的可扩展 1 位全加器 Research Article

Hamideh KHAJEHNASIR-JAHROMI, Pooya TORKZADEH, Massoud DOUSTI

《信息与电子工程前沿(英文)》 2022年 第23卷 第8期   页码 1264-1276 doi: 10.1631/FITEE.2100287

摘要: 近年来,在纳米尺度上使用互补金属氧化物半导体(CMOS)技术设计逻辑电路面临着各种挑战。漏电流、短效应沟道和高能量耗散是一些亟待解决的问题。量子点元胞自动机(QCA)代表了未来可能替代CMOS的一种合适选择,因为与标准CMOS相比,它消耗的能量微不足道。设计算术电路关键是基于1位全加器的结构。低复杂度的全加器模块有利于开发各种复杂结构。本文介绍了基于单元交互的可扩展1位QCA全加器结构。我们提出的全加器包含QCA设计偏好,例如使用的单元数量少、延迟低和占用面积小。此外,所提结构已扩展到更大的电路,包括4位行波进位加法器(RCA)、4位行波借位减法器(RBS)、加/减电路和2位阵列乘法器。所有设计均使用 QCA Designer-E 2.2版软件进行仿真和验证。该工具可以估计能量消耗以及评估电路的性能。仿真结果表明,所提设计在复杂度、面积、延迟、成本和能量消耗方面都是有效的。

关键词: 量子点元胞自动机(QCA);全加器;行波进位加法器(RCA);加/减电路;乘数    

A PLATFORM TO AID SELECT THE OPTIMAL TOOL TO DESIGN GUIDE RNAS

《农业科学与工程前沿(英文)》   页码 296-305 doi: 10.15302/J-FASE-2022479

摘要:

● Summaries on sgRNAs design.

关键词: CRISPR/Cas     Aid-TG     gene editing     sgRNA design     web server    

TG-MS研究生物质组分与聚乙烯共热解特性

范洪刚,顾菁,王亚琢,袁浩然,何明阳,孙富安

《中国工程科学》 2018年 第20卷 第3期   页码 102-108 doi: 10.15302/J-SSCAE-2018.03.015

摘要:

为了探索生物质主要组分在与塑料共热解过程中的协同效应和小分子气体产物的变化规律,笔者采用热重-质谱联用(TG-MS)技术研究纤维素、木聚糖共热解样品的混合比例为1∶1(w/w),TG实验得到了各单组分以及混合组分的失重区间,通过对单组分TG数据的拟合得到理论值与实验值,比较得到混合组分在共热解过程中存在协同效应,可促进样品的分解。

关键词: 纤维素     木聚糖     木质素     聚乙烯     共热解    

Investigations on dehydration processes of trisodium citrate hydrates

Junyan GAO, Yanlei WANG, Hongxun HAO

《化学科学与工程前沿(英文)》 2012年 第6卷 第3期   页码 276-281 doi: 10.1007/s11705-012-1206-4

摘要: The dehydration processes of trisodium citrate (Na C H O ) hydrates were investigated using thermogravimetry (TG), differential scanning calorimetry (DSC) and powder X-ray diffraction (PXRD). It was found that the temperature of dehydration of trisodium citrate dihydrate was at 430.99 K. For trisodium citrate pentahydrate, there is a two-step dehydration process and the endothermal peaks appear at 337.23 K and 433.83 K, respectively. During the first step of dehydration process, the structure of trisodium citrate pentahydrate changed into the structure of trisodium citrate dihydrate. In addition, the kinetics of dehydration for trisoidum citrate hydrates was also investigated using TG data. According to the activation energies of dehydration calculated by Ozawa equation, it was found that the dehydration mechanisms of the two hydrates were different.

关键词: trisodium citrate     dehydration     TG/DSC     PXRD    

量子点细胞自动机中四值逻辑门的设计与模拟新概念 Research Articles

Alireza NAVIDI1, Reza SABBAGHI-NADOOSHAN2, Massoud DOUSTI1

《信息与电子工程前沿(英文)》 2021年 第22卷 第11期   页码 1441-1550 doi: 10.1631/FITEE.2000590

摘要: 量子点细胞自动机(QCA)等新技术已展现出一些深亚微米标准互补金属氧化物半导体无法提供的显著特性。用QCA进行系统建模和设计多值逻辑门,可使复杂逻辑电路设计更加便捷。本文提出“四值QCA(QQCA)”新概念。该概念已在本团队专为四值QCA模型开发的量子点细胞自动模拟器(QCASim)中设定。设计了基本四值QCA逻辑门,如MIN、MAX和不同类型反相器(SQI,PQI,NQI和IQI),并通过QCASim验证。本文将例示QCASim如何通过其方便的CAD工具集快速而准确地工作。采用所设计的主要门电路设计了一个1×4译码器。基于QQCA设计的电路,取得最小延迟、最小面积和最低复杂度。将QQCA主要的逻辑门与基于碳纳米管场效应晶体管(CNFET)的四值门进行比较,结果表明本文所设计的电路具有更小延迟和更低能耗。

关键词: 量子点细胞自动机(QCA);四值逻辑;量子点细胞自动模拟器(QCASim);四值QCA(QQCA);四值译码器;四值门    

Spin polarization strategy to deploy proton resource over atomic-level metal sites for highly selective CO electrolysis

《化学科学与工程前沿(英文)》 2022年 第16卷 第12期   页码 1772-1781 doi: 10.1007/s11705-022-2197-4

摘要: Unlocking of the extremely inert C=O bond during electrochemical CO2 reduction demands subtle regulation on a key “resource”, protons, necessary for intermediate conversion but also readily trapped in water splitting, which is still challenging for developing efficient single-atom catalysts limited by their structural simplicity usually incompetent to handle this task. Incorporation of extra functional units should be viable. Herein, a proton deployment strategy is demonstrated via “atomic and nanostructured iron (A/N-Fe) pairs”, comprising atomically dispersed iron active centers spin-polarized by nanostructured iron carbide ferromagnets, to boost the critical protonation steps. The as-designed catalyst displays a broad window (300 mV) for CO selectivity > 90% (98% maximum), even outperforming numerous cutting-edge M–N–C systems. The well-placed control of proton dynamics by A/N-Fe can promote *COOH/*CO formation and simultaneously suppress H2 evolution, benefiting from the magnetic-proximity-induced exchange splitting (spin polarization) that properly adjusts energy levels of the Fe sites’ d-shells, and further those of the adsorbed intermediates’ antibonding molecular orbitals.

关键词: CO2 electrolysis     single-atom catalysts     spin polarization     proton dynamics     in situ IR spectroscopy     kinetic isotope effect    

Russian school of the theory and geometry of gearing: Its origin and golden period (1935 --1975)

Dmitry BABICHEV,Sergey LAGUTIN,Natalya BARMINA

《机械工程前沿(英文)》 2016年 第11卷 第1期   页码 44-59 doi: 10.1007/s11465-015-0360-z

摘要:

During the second half of the twentieth century, Soviet scientists were among the world leaders in the theory and geometry of gearing or the theoretical fundamentals of designing gears and gear-cutting tools. The authors of the current paper review works related to the development of the theory of gearing (TG) written in Russian from the mid-1930s to the present. Overall, the review covers more than 400 publications of nearly 200 authors (among more than 1000 studied works). This review involves some works on gear strength and accuracy to attract more experts.

This paper presents a short list of works from the seventeenth century to the nineteenth century and discusses the basic concepts of the TG. This paper also includes a review of more than 160 papers in Russian for the period of 1935–1975, which is the “golden age” of the TG. The main features and achievements during this period are also considered.

The distinctive feature of this review is the use of diagrams that visually present TG experts and the dates and themes of their published works. The diagrams also show the following aspects: 1) The most popular and important themes in a specific period, 2) the most important publications on the themes of interest to readers, and 3) the direction of the works and scope of interests of every researcher.

关键词: theory of gearing (TG)     gear geometry     generating surface     gear synthesis     gear analysis    

标题 作者 时间 类型 操作

Research on combustion characteristics of bio-oil from sewage sludge

Rui LI, Baosheng JIN, Xiangru JIA, Zhaoping ZHONG, Gang XIAO, Xufeng FU

期刊论文

Removal of Zn

Feng XUE, Beicheng XIA, Rongrong YING, Shili SHEN, Peng ZHAO

期刊论文

Establishing two-stage interaction between fly ash and NaOH by X-ray and infrared analyses

Bhagwanjee JHA,Nevin KOSHY,Devendra Narain SINGH

期刊论文

Potassium carbonate-based ternary transition temperature mixture (deep eutectic analogues) for CO absorption: Characterizations and DFT analysis

期刊论文

Study on HCl removal for medical waste pyrolysis and combustion using a TG-FTIR analyzer

Hongmei ZHU,Weiying CHEN,Xuguang JIANG,Jianhua YAN,Yong CHI

期刊论文

Pyrolysis behaviors of oil sludge based on TG/FTIR and PY-GC/MS

Wei SONG, Jianguo LIU, Yongfeng NIE,

期刊论文

区域水环境质量的区间可拓评价方法及应用

胡宝清

期刊论文

工程监理委托代理关系中激励约束与参与约束的研究

秦旋

期刊论文

用于设计量子点元胞自动机算术电路的可扩展 1 位全加器

Hamideh KHAJEHNASIR-JAHROMI, Pooya TORKZADEH, Massoud DOUSTI

期刊论文

A PLATFORM TO AID SELECT THE OPTIMAL TOOL TO DESIGN GUIDE RNAS

期刊论文

TG-MS研究生物质组分与聚乙烯共热解特性

范洪刚,顾菁,王亚琢,袁浩然,何明阳,孙富安

期刊论文

Investigations on dehydration processes of trisodium citrate hydrates

Junyan GAO, Yanlei WANG, Hongxun HAO

期刊论文

量子点细胞自动机中四值逻辑门的设计与模拟新概念

Alireza NAVIDI1, Reza SABBAGHI-NADOOSHAN2, Massoud DOUSTI1

期刊论文

Spin polarization strategy to deploy proton resource over atomic-level metal sites for highly selective CO electrolysis

期刊论文

Russian school of the theory and geometry of gearing: Its origin and golden period (1935 --1975)

Dmitry BABICHEV,Sergey LAGUTIN,Natalya BARMINA

期刊论文