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Constant temperature control of tundish induction heating power supply for metallurgical manufacturing

Yufei YUE, Qianming XU, Peng GUO, An LUO

《能源前沿（英文）》 2019年 第13卷 第1期   页码 16-26 doi: 10.1007/s11708-018-0572-0

摘要： The tundish induction heating power supply (TIHPS) is one of the most important equipment in the continuous casting process for metallurgical manufacturing. Specially, the constant temperature control is greatly significant for metallurgical manufacturing. In terms of the relationship between TIH load temperature and output power of TIHPS, the constant temperature control can be realized by power control. In this paper, a TIHPS structure with three-phase PWM rectifiers and full-bridge cascaded inverter is proposed. Besides, an input harmonic current blocking strategy and a load voltage feedforward control are also proposed to realize constant temperature control. To meet the requirement of the system, controller parameters are designed properly. Experiments are conducted to validate the feasibility and effectiveness of the proposed TIHPS topology and the control methods.

关键词： tundish induction heating power supply (TIHPS)     constant temperature control     input harmonic current blocking     load voltage feedforward    

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大规模天线多入多出认知无线网络中的多用户传输速率和能量分析 None

Shang LIU, Ishtiaq AHMAD, Ping ZHANG, Zhi ZHANG

《信息与电子工程前沿（英文）》 2018年 第19卷 第5期   页码 674-684 doi: 10.1631/FITEE.1700081

摘要： 讨论了在包含中继和大规模多入多出天线下的认知无线网络传输性能和能量分配问题。首先得到了在不考虑认知情况下的中继辅助大规模天线网络的下行传输性能，运用功率分配准则，第k个用户的渐近信干噪比与快衰落无关，当基站天线数和中继天线数的比值趋于无穷大时，整个传输过程的传输性能只与从中继到用户侧的传输有关，而与另外一侧的传输无关。接着给出了在完美和非完美信道情况下的认知大规模多入多出天线中继网络性能的闭式表达式。当主用户基站、次级用户基站、中继基站的天线数目趋于无穷大时，传输性能与快衰落无关，主、次网络之间的干扰能被完全消除，次级网络传输性能与干扰温度无关，次级网络可用峰值功率进行传输而不对主用户网络产生干扰。定义了主用户网络的效用函数，通过凸优化分析得到最佳中继发射功率。系统仿真验证了该结论。通过仿真，得到了系统传输速率与天线数目、中继功率、天线数目比值的关系。在多用户认知无线网络中，运用大规模多入多出天线的线性预编码方式能够极大减少干扰，提高传输效率，主用户网络和次级用户网络可以独立传输。

关键词： 大规模多入多出；认知无线电；中继网络；传输速率；功率分析    

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Approximation of structural damping and input excitation force

Mohammad SALAVATI

《结构与土木工程前沿（英文）》 2017年 第11卷 第2期   页码 244-254 doi: 10.1007/s11709-016-0371-9

摘要： Structural dynamic characteristics are the most significant parameters that play a decisive role in structural damage assessment. The more sensitive parameter to the damage is the damping behavior of the structure. The complexity of structural damping mechanisms has made this parameter to be one of the ongoing research topics. Despite all the difficulties in the modeling of damping, there are some approaches like as linear and nonlinear models which are described as the energy dissipation throughout viscous, material or structural hysteretic and frictional damping mechanisms. In the presence of a mathematical model of the damping mechanisms, it is possible to estimate the damping ratio from the theoretical comparison of the damped and un-damped systems. On the other hand, solving the inverse problem of the input force estimation and its distribution to each SDOFs, from the measured structural responses plays an important role in structural identification process. In this paper model-based damping approximation method and a model-less structural input estimation are considered. The effectiveness of proposed methods has been carried out through analytical and numerical simulation of the lumped mass system and the results are compared with reference data. Consequently, high convergence of the comparison results illustrates the satisfactory of proposed approximation methods.

关键词： structural modal parameters     damping identification method     input excitation force identification     Inverse problem    

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Greenhouse gas emissions mitigation and economic viability of sugar crops in China

《农业科学与工程前沿（英文）》 doi: 10.15302/J-FASE-2023529

摘要：

● Sugarcane and sugar beet yield and carbon footprint rose with time but profit declined

关键词： Economic profits     GHG emissions     labor input     nitrogen input     sugar    

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Solar photovoltaic fed dual input LED lighting system with constant illumination control

Kinattingal SUNDARESWARAN,Kevin Ark KUMAR,Payyalore Raman VENKATESWARAN,Sankaran PALANI

《能源前沿（英文）》 2016年 第10卷 第4期   页码 473-478 doi: 10.1007/s11708-016-0420-z

摘要： A dual input LED lighting scheme with constant illumination is proposed in this paper. The scheme employs a photovoltaic array as the first input and a battery as the second one. A microcontroller is programmed to operate a changeover switch as well as a DC-DC converter for uninterrupted and constant illumination in work place. The scheme is suitable for conference halls, laboratories, clean rooms, marriage halls, theaters, etc. The complete modeling, design and experimentation of the proposed scheme are explained and the economic viability of the scheme is justified.

关键词： photovoltaic     LED light     dual input     P&O algorithm    

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核电厂的抗震设计输入及AP1000核岛隔震课题简介

夏祖讽

《中国工程科学》 2013年 第15卷 第4期   页码 52-56

摘要：

首先简单介绍了世界各国核电厂抗震输入的概况，同时提及了法国、日本及我国相关部门对核岛基础隔震的一些探索，接着重点涉及上海核工程研究设计院针对AP1000系列机组所开展的核岛基础隔震设计课题的总体概念设计内容。本文对核电厂的抗震设计及核岛结构基础的隔震设计提供了较多的实用信息，以供参考。

关键词： 核电厂     抗震设计     AP1000     基础隔震    

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A review on application of dielectric barrier discharge plasma technology on the abatement of volatile organic compounds

Wenjing Lu, Yawar Abbas, Muhammad Farooq Mustafa, Chao Pan, Hongtao Wang

《环境科学与工程前沿（英文）》 2019年 第13卷 第2期 doi: 10.1007/s11783-019-1108-5

摘要：

• Applications of non-thermal plasma reactors for reduction of VOCs were reviewed.

• Dielectric barrier discharge (DBD) plasma was considered.

• Effect of process parameters was studied.

• Effect of catalysts and inhibitors were evaluated.

关键词： Non-thermal plasma (NTP)     Dielectric barrier discharge (DBD)     Volatile organic compounds (VOCs)     Abatement     Input power    

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Cutting CO emissions through demand side regulation: Implications from multi-regional input–output linear

《工程管理前沿（英文）》   页码 452-461 doi: 10.1007/s42524-022-0209-1

摘要： This study combines multi-regional input–output (MRIO) model with linear programming (LP) model to explore economic structure adjustment strategies for the reduction of carbon dioxide (CO2) emissions. A particular feature of this study is the identification of the optimal regulation sequence of final products in various regions to reduce CO2 emissions with the minimum loss in gross domestic product (GDP). By using China’s MRIO tables 2017 with 28 regions and 42 economic sectors, results show that reduction in final demand leads to simultaneous reductions in GDP and CO2 emissions. Nevertheless, certain demand side regulation strategy can be adopted to lower CO2 emissions at the smallest loss of economic growth. Several key final products, such as metallurgy, nonmetal, metal, and chemical products, should first be regulated to reduce CO2 emissions at the minimum loss in GDP. Most of these key products concentrate in the coastal developed regions in China. The proposed MRIO–LP model considers the inter-relationship among various sectors and regions, and can aid policy makers in designing effective policy for industrial structure adjustment at the regional level to achieve the national environmental and economic targets.

关键词： CO2 emissions     demand side regulation     multi-regional input–output model     linear programming model    

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优化设计输入和分析方法以提高核电厂抗震安全性

张超琦,杨建华

《中国工程科学》 2013年 第15卷 第4期   页码 83-90

摘要：

日本福岛事故后核电厂抵御极端自然灾害能力受到广泛关注，世界上各个国家都积极开展相关研究，而地震一直是核电厂工程安全问题的主要威胁之一，因此核电厂的抗震安全性更是成为业界分析研究的重点。楼层反应谱作为核电厂系统、结构和部件抗震设计的输入，其计算分析是核电厂抗震分析的重要环节，其结果对于核电厂的抗震安全水平起着举足轻重的作用。本文以中国核电工程有限公司自主研发的三代机型ACP1000标准设计为例，通过介绍楼层反应谱的输入、分析过程和方法，来阐述合理确定符合国情的地震输入、采用先进的建模和分析方法，对完善核电厂的抗震设计、提高核电厂的抗震安全性具有重要意义。

关键词： 核电厂     ACP1000     抗震分析     楼层反应谱     三维有限元模型     土结相互作用    

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Estimation of regional physical imports and exports of EW-MFA in China using monetary input-output tables

Nan LI, Tianzhu ZHANG

《环境科学与工程前沿（英文）》 2013年 第7卷 第2期   页码 242-254 doi: 10.1007/s11783-012-0443-6

摘要： Given the statistical gaps in material flow among provinces in China, a method was introduced to estimate regional physical imports and exports (RPIE), which includes international and interregional imports/exports. This method uses provincial monetary input-output tables (MIOT) and international trade statistics. A coefficient matrix representing correlations between monetary value and physical mass for years 2000–2009 was obtained based on a detailed commodity classification and 22 material production sectors in MIOT. With the coefficient matrix as reference, RPIE was measured. Pilot calculation of both regional physical trade balance and domestic material consumption, as well as a brief analysis of these methods, were conducted using 2002 data.

关键词： economy-wide material flow accounts (EW-MFA)     monetary input-output table (MIOT)     regional physical imports and exports estimation    

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Oral product input to the GI tract: GIS an oral product performance technology

Gordon L. Amidon, Yasuhiro Tsume

《化学科学与工程前沿（英文）》 2017年 第11卷 第4期   页码 516-520 doi: 10.1007/s11705-017-1658-7

摘要： The patient receives a pharmaceutical product, not a drug. The pharmaceutical products are formulated with a drug, an active ingredient to produce the maximum therapeutic effect after oral absorption. Therefore, it is the product we must optimize for the patients. In order to assure the safety and efficacy of pharmaceutical products, we need an predictive tool for oral product performance in patients. Currently, we are a surprisingly long way from accomplishing that objective. If the 20th century was the ‘age of the drug’, i.e., the ‘magic bullet’, the 21st century must become the ‘age of the guided missile’, i.e., the delivery system, including the form of the active pharmaceutical ingredient (API) (‘drug’). The physical form of the drug and the delivery system must be optimized to maximize the therapeutic benefits of pharmaceutical products for humans. Oral immediate release (IR) dosage forms cannot be optimal for all drugs or likely even any drugs (APIs). Still, the formulation of pharmaceutical products has to be optimized for patients. But how do we optimize oral delivery of drugs? It is usually through ‘trial and error’, in humans! We need a better way to optimize the oral dosage forms. We have suggested to select different dissolution methodologies for this optimization based on BCS Subclasses. In this article, we present the predicted drug dissolution profile of ketoconazole as a model drug from our laboratory utilizing a gastrointestinal simulator (GIS), which is an adaptation of the ASD system. GIS consists of three chambers representing stomach, duodenum, and jejunum, to create the human gastrointestinal tract-like environment and enable the control the gastric emptying rate. This dissolution system allows the monitoring of the drug dissolution phenomena and the observation of the supersaturation and the precipitation of pharmaceutical products, which is useful information to predict dissolution of pharmaceutical products. This system can provide the actual input needed to accurately predict the input into the systemic circulation required by many of the absorption prediction packages available today.

关键词： GIS     in vivo predictive dissolution     ketoconazole     BCS subclassification     supersaturation    

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Multiple input self-organizing-map ResNet model for optimization of petroleum refinery conversion units

《化学科学与工程前沿（英文）》 2023年 第17卷 第6期   页码 759-771 doi: 10.1007/s11705-022-2269-5

摘要： This work introduces a deep-learning network, i.e., multi-input self-organizing-map ResNet (MISR), for modeling refining units comprised of two reactors and a separation train. The model is comprised of self-organizing-map and the neural network parts. The self-organizing-map part maps the input data into multiple two-dimensional planes and sends them to the neural network part. In the neural network part, residual blocks enhance the convergence and accuracy, ensuring that the structure will not be overfitted easily. Development of the MISR model of hydrocracking unit also benefits from the utilization of prior knowledge of the importance of the input variables for predicting properties of the products. The results show that the proposed MISR structure predicts more accurately the product yields and properties than the previously introduced self-organizing-map convolutional neural network model, thus leading to more accurate optimization of the hydrocracker operation. Moreover, the MISR model has smoother error convergence than the previous model. Optimal operating conditions have been determined via multi-round-particle-swarm and differential evolution algorithms. Numerical experiments show that the MISR model is suitable for modeling nonlinear conversion units which are often encountered in refining and petrochemical plants.

关键词： hydrocracking     convolutional neural networks     self-organizing map     deep learning     data-driven optimization    

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面向大规模MIMO系统的高效功率放大器及其线性化技术综述 Review Articles

Xin LIU, Guan-sheng LV, De-han WANG, Wen-hua CHEN, Fadhel M. GHANNOUCHI

《信息与电子工程前沿（英文）》 2020年 第21卷 第1期   页码 72-96 doi: 10.1631/FITEE.1900467

摘要： 为适应数据传输速率的爆炸性增长以及大规模多输入多输出（mMIMO）技术的应用，业界开发了高效率功率放大器（PA）和相关线性化技术。本文根据5G系统的两个核心频段——sub-6 GHz和毫米波（mmWave）——的特点，对高效率集成化的Doherty功放单片微波集成电路（MMIC）和线性化技术进行了综述，比较和分析了不同半导体工艺和架构下的高效功放设计思路。由于5G协议尚未最终确定，大规模MIMO系统中的功放规范仍在考虑中，有必要研究新的设计方法以进一步提高其效率和线性性能。此外，数字预失真线性化技术需要发展，以适应大规模MIMO系统，并且需要一些创新的线性增强技术来同时提高补偿精度和降低功耗。

关键词： 高效节能；线性化；大规模多输入多输出（mMIMO）；单片微波集成电路（MMIC）；功率放大器    

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一种针对非理想电源对水下恒流缆系统影响的分析方法 Personal View

Yu-jia ZANG, Yan-hu CHEN, Can-jun YANG, De-jun LI, Ze-jian CHEN, Gul MUHAMMAD

《信息与电子工程前沿（英文）》 2020年 第21卷 第4期   页码 604-614 doi: 10.1631/FITEE.1800737

摘要： 在过去，非理想恒流电源对恒流海洋观测系统的影响是一个被忽视的问题。事实上，恒流电源的动态特性对整个系统，特别是对负载变化时的动态响应有很大影响。因此，在实际工程应用中有必要对非理想恒流电源进行校核。本文介绍一种校核非理想恒流电源是否满足水下恒流缆系统动态特性的方法，并提出一种描述非理想恒流电源的等效模型。通过该模型，可规范恒流电源动态特性的技术指标。首先，构造恒流海洋观测网络系统中单节点的最小系统，并推导其数学模型。其次，针对系统可能存在的掉电问题，分析对系统的输出电压响应，并验证所提模型。最后，采用所提模型校核实际应用中的恒流电源动态特性。

关键词： 非理想恒流电源；恒流输入；海洋观测系统    

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A dynamic stiffness-based framework for harmonic input estimation and response reconstruction considering

Yixian LI; Limin SUN; Wang ZHU; Wei ZHANG

《结构与土木工程前沿（英文）》 2022年 第16卷 第4期   页码 448-460 doi: 10.1007/s11709-022-0805-5

摘要： In structural health monitoring (SHM), the measurement is point-wise but structures are continuous. Thus, input estimation has become a hot research subject with which the full-field structural response can be calculated with a finite element model (FEM). This paper proposes a framework based on the dynamic stiffness theory, to estimate harmonic input, reconstruct responses, and to localize damages from seriously deficient measurements. To begin, Fourier transform converts the dynamic equilibrium equation to an equivalent static one in the frequency domain, which is under-determined since the dimension of measurement vector is far less than the FEM-node number. The principal component analysis has been adopted to “compress” the under-determined equation, and formed an over-determined equation to estimate the unknown input. Then, inverse Fourier transform converts the estimated input in the frequency domain to the time domain. Applying this to the FEM can reconstruct the target responses. If a structure is damaged, the estimated nodal force can localize the damage. To improve the damage-detection accuracy, a multi-measurement-based indicator has been proposed. Numerical simulations have validated that the proposed framework can capably estimate input and reconstruct multi-types of full-field responses, and the damage indicator can localize minor damages even with the existence of noise.

关键词： dynamic stiffness     principal component analysis     response reconstruction     damage localization     under-determined equation    

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标题 作者 时间 类型 操作

Constant temperature control of tundish induction heating power supply for metallurgical manufacturing

Yufei YUE, Qianming XU, Peng GUO, An LUO

期刊论文

大规模天线多入多出认知无线网络中的多用户传输速率和能量分析

Shang LIU, Ishtiaq AHMAD, Ping ZHANG, Zhi ZHANG

期刊论文

Approximation of structural damping and input excitation force

Mohammad SALAVATI

期刊论文

Greenhouse gas emissions mitigation and economic viability of sugar crops in China

期刊论文

Solar photovoltaic fed dual input LED lighting system with constant illumination control

Kinattingal SUNDARESWARAN,Kevin Ark KUMAR,Payyalore Raman VENKATESWARAN,Sankaran PALANI

期刊论文

核电厂的抗震设计输入及AP1000核岛隔震课题简介

夏祖讽

期刊论文

A review on application of dielectric barrier discharge plasma technology on the abatement of volatile organic compounds

Wenjing Lu, Yawar Abbas, Muhammad Farooq Mustafa, Chao Pan, Hongtao Wang

期刊论文

Cutting CO emissions through demand side regulation: Implications from multi-regional input–output linear

期刊论文

优化设计输入和分析方法以提高核电厂抗震安全性

张超琦,杨建华

期刊论文

Estimation of regional physical imports and exports of EW-MFA in China using monetary input-output tables

Nan LI, Tianzhu ZHANG

期刊论文

Oral product input to the GI tract: GIS an oral product performance technology

Gordon L. Amidon, Yasuhiro Tsume

期刊论文

Multiple input self-organizing-map ResNet model for optimization of petroleum refinery conversion units

期刊论文

面向大规模MIMO系统的高效功率放大器及其线性化技术综述

Xin LIU, Guan-sheng LV, De-han WANG, Wen-hua CHEN, Fadhel M. GHANNOUCHI

期刊论文

一种针对非理想电源对水下恒流缆系统影响的分析方法

Yu-jia ZANG, Yan-hu CHEN, Can-jun YANG, De-jun LI, Ze-jian CHEN, Gul MUHAMMAD

期刊论文

A dynamic stiffness-based framework for harmonic input estimation and response reconstruction considering

Yixian LI; Limin SUN; Wang ZHU; Wei ZHANG

期刊论文