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期刊论文 11

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2022 1

2021 2

2019 2

2017 1

2015 1

2013 1

2008 1

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关键词

CO 1

“一带一路”,制造业,六大经济走廊,显性比较优势指数,多维尺度分析 1

产流 1

优化 1

偶联 1

催化剂工程 1

冠层截留 1

动态电压调节 1

发酵 1

土壤水 1

地下水 1

循环 1

放大 1

模试放大 1

正交频分复用;峰均比;非线性缩放;调频技术 1

水文尺度 1

水文过程 1

生物反应器 1

电池优化 1

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Fast scaling approach based on cavitation conditions to estimate the speed limitation for axial piston

Qun CHAO, Jianfeng TAO, Junbo LEI, Xiaoliang WEI, Chengliang LIU, Yuanhang WANG, Linghui MENG

《机械工程前沿(英文)》 2021年 第16卷 第1期   页码 176-185 doi: 10.1007/s11465-020-0616-0

摘要: The power density of axial piston pumps can benefit greatly from increased rotational speeds. However, the maximum rotational speed of axial piston machines is limited by the cavitation phenomenon for a given volumetric displacement. This paper presents a scaling law derived from an analytical cavitation model to estimate the speed limitations for the same series of axial piston pumps. The cavitation model is experimentally verified using a high-speed axial piston pump, and the scaling law is validated with open specification data in product brochures. Results show that the speed limitation is approximately proportional to the square root of the inlet pressure and inversely proportional to the cube root of volumetric displacement. Furthermore, a characteristic constant is defined based on the presented scaling law. This constant can represent the comprehensive capacity of axial piston pumps free from cavitation.

关键词: axial piston pump     cavitation     speed limitation     scaling law    

考虑电池放电特性的动态电压调节策略研究

许参,胡晨

《中国工程科学》 2008年 第10卷 第2期   页码 79-85

摘要: 研究了在考虑电池放电特性情况下动态电压调节策略(DVS, dynamic voltage scaling)最小化电池容量消耗的问题。

关键词: 电池优化     动态电压调节     空闲时间分布调整    

Scaling up of cluster beam deposition technology for catalysis application

《化学科学与工程前沿(英文)》 2021年 第15卷 第6期   页码 1360-1379 doi: 10.1007/s11705-021-2101-7

摘要: Many research works have demonstrated that the combination of atomically precise cluster deposition and theoretical calculations is able to address fundamental aspects of size-effects, cluster-support interactions, and reaction mechanisms of cluster materials. Although the wet chemistry method has been widely used to synthesize nanoparticles, the gas-phase synthesis and size-selected strategy was the only method to prepare supported metal clusters with precise numbers of atoms for a long time. However, the low throughput of the physical synthesis method has severely constrained its wider adoption for catalysis applications. In this review, we introduce the latest progress on three types of cluster source which have the most promising potential for scale-up, including sputtering gas aggregation source, pulsed microplasma cluster source, and matrix assembly cluster source. While the sputtering gas aggregation source is leading ahead with a production rate of ~20 mg·h–1, the pulsed microplasma source has the smallest physical dimensions which makes it possible to compact multiple such devices into a small volume for multiplied production rate. The matrix assembly source has the shortest development history, but already show an impressive deposition rate of ~10 mg·h–1. At the end of the review, the possible routes for further throughput scale-up are envisaged.

关键词: nanoparticle     cluster     cluster beam deposition     magnetron sputtering     heterogeneous catalysis    

Scaling up a novel denitrifying microbial fuel cell with an oxic-anoxic two stage biocathode

Peng LIANG, Jincheng WEI, Ming LI, Xia HUANG

《环境科学与工程前沿(英文)》 2013年 第7卷 第6期   页码 913-919 doi: 10.1007/s11783-013-0583-3

摘要: A scaled up microbial fuel cell (MFC) of a 50 L volume was set up with an oxic-anoxic two-stage biocathode and activated semicoke packed electrodes to achieve simultaneous power generation and nitrogen and organic matter removals. An average maximum power density of 43.1 W·m was obtained in batch operating mode. By adjusting the two external resistances, the denitrification in the A-MFC and power production in the O-MFC could be enhanced. In continuous mode, when the hydraulic retention times were set at 6 h, 8 h and 12 h, the removal efficiencies of COD, and total nitrogen (TN) were higher than 95%, 97%, and 84%, respectively. Meanwhile the removal loads for COD, and TN were10, 0.37 and 0.4 kg·(m ·d) , respectively.

关键词: microbial fuel cell (MFC)     oxic-anoxic two stage biocathode     denitrifying    

Energy-aware scheduling with reconstruction and frequency equalization on heterogeneous systems

Yong-xing LIU,Ken-li LI,Zhuo TANG,Ke-qin LI

《信息与电子工程前沿(英文)》 2015年 第16卷 第7期   页码 519-531 doi: 10.1631/FITEE.1400399

摘要: With the increasing energy consumption of computing systems and the growing advocacy for green computing, energy efficiency has become one of the critical challenges in high-performance heterogeneous computing systems. Energy consumption can be reduced by not only hardware design but also software design. In this paper, we propose an energy-aware scheduling algorithm with equalized frequency, called EASEF, for parallel applications on heterogeneous computing systems. The EASEF approach aims to minimize the finish time and overall energy consumption. First, EASEF extracts the set of paths from an application. Then, it reconstructs the application based on the extracted set of paths to achieve a reasonable schedule. Finally, it adopts a progressive way to equalize the frequency of tasks to reduce the total energy consumption of systems. Randomly generated applications and two real-world applications are examined in our experiments. Experimental results show that the EASEF algorithm outperforms two existing algorithms in terms of makespan and energy consumption.

关键词: Directed acyclic graph     Dynamic voltage scaling     Energy aware     Heterogeneous systems     Task scheduling    

CO气相偶联制草酸模拟放大研究

王保伟,马新宾,李振花,许根慧

《中国工程科学》 2001年 第3卷 第2期   页码 79-85

摘要:

CO气相偶联制草酸为多步反应循环系统。在评选出最佳催化剂及理论研究的基础上,利用模拟计算、催化剂工程研究和模试运转对CO气相偶联合成草酸二乙酯的工程问题进行了研究,解决了偶联反应和再生反应速率匹配的关键技术。在反应动力学和反应参数敏感性分析的基础上,经模试1000小时连续运转,解决了复杂反应的非线性多步循环的速率匹配,并建立了零排放洁净工艺过程;研制的催化剂适用于CO偶联反应工业放大工程,为工业生产提供了一条绿色化学工艺路线。

关键词: CO     偶联     草酸     模试放大     催化剂工程    

发酵过程多水平问题及其生物反应器装置技术研究——基于过程参数相关的发酵过程优化与放大技术

张嗣良

《中国工程科学》 2001年 第3卷 第8期   页码 37-45

摘要:

回顾了发酵过程优化与放大所依据的基本思想和方法,认为采用以动力学为基础的最佳工艺控制点为依据的静态操作方法,实质上只是化学工程宏观动力学概念在发酵工程上的延伸,往往忽视细胞代谢流的存在。以细胞代谢流的分析与控制为核心的生物反应工程学的观点,通过实验研究,提出了基于参数相关的发酵过程多水平问题研究的优化技术和发酵过程多参数调整的放大技术。随着过程传感技术和计算机技术的发展,设计了一种定型为FUS-50L(A)的新概念生物反应器。这种新型生物反应器是以物料流检测为手段,过程优化与放大为目标,成功地应用在青霉素、红霉素、金霉素、肌苷、鸟苷发酵和Pichia酵母表达系统的基因工程人血清白蛋白(rh-SA)、疟疾疫苗等高密度高表达培养,大幅度提高发酵水平,并直接放大到几百升,甚至100 m3以上生产规模发酵罐。

关键词: 生物反应器     发酵     优化     放大    

Large-scale industrial manufacturing of carbon nanotubes in a continuous inclined mobile-bed rotating reactor via the catalytic chemical vapor deposition process

Sophie L. Pirard, Sigrid Douven, Jean-Paul Pirard

《化学科学与工程前沿(英文)》 2017年 第11卷 第2期   页码 280-289 doi: 10.1007/s11705-017-1635-1

摘要: This article reports the different steps of the design, development and validation of a process for continuous production of carbon nanotubes (CNTs) via catalytic chemical vapor deposition from the laboratory scale to the industrial production. This process is based on a continuous inclined mobile-bed rotating reactor and very active catalysts using methane or ethylene as carbon source. The importance of modeling taking into account the hydrodynamic, physicochemical and physical phenomena that occur during CNT production in the process analysis is emphasized. The impact of this invention on the environment and human health is taken into consideration too.

关键词: carbon nanotubes     catalytic chemical vapor deposition     inclined rotating reactor     industrial process     scaling-up    

一种基于非线性缩放和调频技术的抑制OFDM信号峰均比方法 Regular Article

Yi-hu Xu, Jung-Yeol Oh, Zhen-hao Sun, Myoung-Seob Lim,xuyh@ybu.edu.cn,mslim@jbnu.ac.kr

《信息与电子工程前沿(英文)》 2019年 第20卷 第11期   页码 1587-1594 doi: 10.1631/FITEE.1800438

摘要: 正交频分复用(OFDM)是第4代移动通信系统的基本传输技术,在频率选择性衰弱信道环境下具有非常高的传输能力。然而,非恒定包络信号引起的高峰均比(PAPR)是OFDM系统主要缺点之一。OFDM的高峰值信号通过非线性放大器时失真,导致误码率下降。很多关于抑制PAPR的研究都以增加带宽或减少吞吐量为代价,以弥补抑制峰均比所需开销。本文提出一种基于非线性缩放技术的抑制峰均比方法,有效缩放峰值高于非线性放大器阈值的信号,并通过调频技术将缩放时隙位置和缩放比例信息结合在OFDM信号,减少传输所需附加带宽。仿真结果表明,与传统方法相比,所提方法具有更低峰均比,且误码率性能更佳。

关键词: 正交频分复用;峰均比;非线性缩放;调频技术    

“一带一路”沿线六大经济走廊优势产业及制造业国际合作现状分析

汤永川,潘云鹤,张雪,黄江杰

《中国工程科学》 2019年 第21卷 第4期   页码 60-68 doi: 10.15302/J-SSCAE-2019.04.003

摘要:

“一带一路”建设正在从谋篇布局的“大写意”阶段转向精耕细作的“工笔画”阶段,这一转向升级对我国制造业国际合作提出更高的要求。本文基于联合国发布的国际贸易数据,以“一带一路”沿线六大经济走廊为重点研究对象,运用显性比较优势指数方法综合分析了六大经济走廊沿线国家比较优势产业。同时,应用多维尺度分析方法探讨了我国与六大经济走廊沿线国家总体贸易和制造业合作情况。最后,聚焦六大经济走廊沿线国家优势产业和要素禀赋,提出了我国与“一带一路”沿线国家制造业高质量合作的发展方向。

关键词: “一带一路”,制造业,六大经济走廊,显性比较优势指数,多维尺度分析    

新安江多尺度嵌套水文循环实验流域——科学目标和总体设计 Article

张珂, 李运平, 余钟波, 杨涛, 徐俊增, 晁丽君, 倪晋, 王流通, 高云, 胡余忠, 林祚顶

《工程(英文)》 2022年 第18卷 第11期   页码 207-217 doi: 10.1016/j.eng.2021.08.026

摘要:

本文介绍了于2017 年在中国东部建立的新安江多尺度嵌套水文循环实验流域(XAJ-NEW)的研究背景、科学目标、实验设计和初步成果。该实验流域地处亚热带湿润季风气候区域,流域总面积为2674 km2。XAJ-NEW旨在在典型湿润山丘区构建一个多尺度嵌套水文气象综合观测实验系统,强化对水循环的精
细监测,探索水文过程时空尺度效应,揭示径流产生和分配机制。经过两年的观测运行,初步结果表明,包括降水、径流、地下水、土壤水在内的关键水文气象过程和要素的时空变率与尺度密切相关,并对冠层截留和地表地下径流组分的分配过程进行定量观测。对XAJ-NEW的持续监测可以进一步揭示产流和径流分配机制,揭示水文过程的时空尺度效应,理解气候变化对水文过程的影响。以上成果可以为理解多尺度水文过程及该过程对气候要素的响应、完善模型参数化方案、增强气候预测提供新的见解。

关键词: 循环     产流     水文过程     水文尺度     土壤水     地下水     冠层截留    

标题 作者 时间 类型 操作

Fast scaling approach based on cavitation conditions to estimate the speed limitation for axial piston

Qun CHAO, Jianfeng TAO, Junbo LEI, Xiaoliang WEI, Chengliang LIU, Yuanhang WANG, Linghui MENG

期刊论文

考虑电池放电特性的动态电压调节策略研究

许参,胡晨

期刊论文

Scaling up of cluster beam deposition technology for catalysis application

期刊论文

Scaling up a novel denitrifying microbial fuel cell with an oxic-anoxic two stage biocathode

Peng LIANG, Jincheng WEI, Ming LI, Xia HUANG

期刊论文

Energy-aware scheduling with reconstruction and frequency equalization on heterogeneous systems

Yong-xing LIU,Ken-li LI,Zhuo TANG,Ke-qin LI

期刊论文

CO气相偶联制草酸模拟放大研究

王保伟,马新宾,李振花,许根慧

期刊论文

发酵过程多水平问题及其生物反应器装置技术研究——基于过程参数相关的发酵过程优化与放大技术

张嗣良

期刊论文

Large-scale industrial manufacturing of carbon nanotubes in a continuous inclined mobile-bed rotating reactor via the catalytic chemical vapor deposition process

Sophie L. Pirard, Sigrid Douven, Jean-Paul Pirard

期刊论文

一种基于非线性缩放和调频技术的抑制OFDM信号峰均比方法

Yi-hu Xu, Jung-Yeol Oh, Zhen-hao Sun, Myoung-Seob Lim,xuyh@ybu.edu.cn,mslim@jbnu.ac.kr

期刊论文

“一带一路”沿线六大经济走廊优势产业及制造业国际合作现状分析

汤永川,潘云鹤,张雪,黄江杰

期刊论文

新安江多尺度嵌套水文循环实验流域——科学目标和总体设计

张珂, 李运平, 余钟波, 杨涛, 徐俊增, 晁丽君, 倪晋, 王流通, 高云, 胡余忠, 林祚顶

期刊论文