Search | Engineering

订阅投稿

首页工程期刊工程焦点工程成就工程前沿关于我们 English

资源类型

期刊论文 20

会议视频 2

年份

2023 2

2022 3

2021 2

2019 2

2017 1

2015 3

2012 1

2011 2

2010 1

2007 1

2003 1

2002 1

2000 1

展开︾

关键词

BP神经网络 1

Nelder-Mead单纯形法 1

产出水处理 1

低压集输工艺 1

信息技术 1

光纤 1

农业科学 1

农林生物质 1

基因功能研究 1

基因定位和克隆 1

基因家族-候选疾病基因克隆 1

基因组扫描 1

太阳光采集 1

实验设计思路 1

工业化 1

微波无线能量传输 1

扩展背向探测；增强探测；非线性荧光显微镜；硅光电倍增管阵列 1

控制 1

撬装式液化 1

展开︾

检索范围：

排序：展示方式：

Experiment and optimal design of a collection device for a residual plastic film baler

Qi NIU,Xuegeng CHEN,Chao JI,Jie WU

《农业科学与工程前沿（英文）》 2015年第2卷第4期页码 347-354 doi: 10.15302/J-FASE-2015077

摘要： It is imperative to carry out research on residual plastic film collection technology to solve the serious problem of farmland pollution. The residual plastic film baler was designed as a package for film strip collection, cleaning and baling. The collection device is a core component of the baler. Response surface analysis was used in this study to optimize the structure and working parameters for improving the collection efficiency of residual film and the impurity of film package. The results show that the factors affecting the collection rate of residual film and the impurity of the film package are the speed ratio ( ) between the trash removal roller and eccentric collection mechanism, the number ( ) and the mounting angle ( ) of spring teeth in the same revolution plane. For the collection rate, the importance of the three factors are in the order, . Meanwhile, for the impurity, the importance of three factors are in the order, . When the speed ratio, the mounting angle and the number of spring teeth was set at 1.6°, 45°, and 8°, respectively, the collection rate of residual film was 88.9% and the impurity of residual film package was 14.2% for the baler.

关键词： residual film collection device collection rate of residual film impurity of film package optimization baler

HTML PDF 收藏

具有环形接收区域的微波无线能量传输发射天线口径场分布设计方法 Article

李勋, 段宝岩, 张逸群, 郭永新

《工程（英文）》 2023年第30卷第11期页码 63-74 doi: 10.1016/j.eng.2023.07.016

摘要：

本文提出了一种具有环形接收区域的微波无线能量传输发射天线口径场分布设计方法。该设计的目标是最大化辐射到环形接收区域上的微波功率与总传输功率的比值。通过将口径场幅度分布表示为一组特殊级数的求和，可将该最优设计问题简化为寻找两个实二次型的最大比值。基于矩阵论，可通过确定最大特征值及其对应的特征向量来解决该优化问题。为满足安全要求，将接收区域外的峰值辐射电平视为额外约束。为解决该约束优化问题，提出了将灰狼优化算法和Nelder-Mead单纯形法结合的混合优化方法。为证明所提方法的有效性，首先，对连续口径场分布进行数值仿真实验。然后，使用离散阵列天线来验证优化结果的正确性，其中单元假设为各向同性的点源。最后，采用微带贴片阵列来进一步验证所提出方法的有效性。

关键词：微波无线能量传输波束收集效率环形波束环形接收区域灰狼算法 Nelder-Mead单纯形法

HTML PDF 收藏

中国农林生物质工业化收集应用模式的研究

庄会永,张雁茹, 田雅林,王革华

《中国工程科学》 2011年第13卷第2期页码 101-106

摘要：

以现有中国生物发电项目的生物质资源规模化应用研究为基础，总结理论和实践经验，在技术路线选择、模式建设以及体系完善等方面开展研究分析，结合中国具体项目实践，建设和完善中国农林生物质工业化收集应用模式。

关键词：农林生物质工业化收集应用模式

HTML PDF 收藏

Layered alkali titanates (ATiO): possible uses for energy/environment issues

《能源前沿（英文）》 2021年第15卷第3期页码 631-655 doi: 10.1007/s11708-021-0776-6

摘要： Uses of layered alkali titanates (A₂Ti_nO₂_n₊₁; Na₂Ti₃O₇, K₂Ti₄O₉, and Cs₂Ti₅O₁₁) for energy and environmental issues are summarized. Layered alkali titanates of various structural types and compositions are regarded as a class of nanostructured materials based on titanium oxide frameworks. If compared with commonly known titanium dioxides (anatase and rutile), materials design based on layered alkali titanates is quite versatile due to the unique structure (nanosheet) and morphological characters (anisotropic particle shape). Recent development of various synthetic methods (solid-state reaction, flux method, and hydrothermal reaction) for controlling the particle shape and size of layered alkali titanates are discussed. The ion exchange ability of layered alkali titanate is used for the collection of metal ions from water as well as a way of their functionalization. These possible materials design made layered alkali titanates promising for energy (including catalysis, photocatalysts, and battery) and environmental (metal ion concentration from aqueous environments) applications.

关键词： layered alkali titanates photocatalysis hydrogen evdution metal ions collection

HTML PDF 收藏

In quest of the origin of ancient northern city of China: An implication from the Book of Odes

DAI Fudong

《结构与土木工程前沿（英文）》 2007年第1卷第4期页码 389-392 doi: 10.1007/s11709-007-0052-9

摘要： Sorting out some paragraphs in (collection of the earliest poetry in China), this paper makes analysis of the formation, construction process and technology of the ancient northern city of China. Relevan

关键词： analysis construction formation collection paragraphs

HTML PDF 收藏

一种用于寻找无人船回收海床基数据最佳通信点的梯度上升控制法 Research Papers

Jiu-cai JIN, Jie ZHANG, Zhi-chao LV

《信息与电子工程前沿（英文）》 2019年第20卷第6期页码 751-759 doi: 10.1631/FITEE.1700732

摘要：给出了一种在无人船声学回收海床基数据时寻找最佳通信点的控制方法。众所周知，梯度上升极值寻找法常应用于多平台或多智能体，这是因为多平台能大范围测量且易于梯度估计。单一平台测量范围有限，不能快速估计测量场，难以迅速获得测量场极值。本文提出一种无人船振荡运动形式，以获取海床基与无人船间水声通信链路强度数据。基于多元加权线性递归法，利用无人船振荡运动获取的新数据，不断更新水声通信链路强度场。基于梯度上升和人工势场方法，考虑未知场的递归估计，设计无人船最佳通信点控制器，并证明其稳定性。仿真结果表明该算法可靠、高效。

关键词：无人船；数据回收；水声通信；梯度上升；极值寻找

HTML PDF 收藏

采集太阳光的照明系统研究

张耀明

《中国工程科学》 2002年第4卷第9期页码 63-68

摘要：

简要介绍了欧美和日本在采集太阳光用于室内照明技术研究的进展及我国在研究开发全自动跟踪太阳的采光装置，攻克聚光、跟踪和传光等关键技术所取得的成果。指出研究全光谱利用，结合采光技术和光伏发电技术，达到代电和发电功能是进一步研究、发展的目标。

关键词：太阳光采集光纤跟踪照明

HTML PDF 收藏

Towards a respondent-preferred ki-anonymity model

Kok-Seng WONG,Myung Ho KIM

《信息与电子工程前沿（英文）》 2015年第16卷第9期页码 720-731 doi: 10.1631/FITEE.1400395

摘要： Recently, privacy concerns about data collection have received an increasing amount of attention. In data collection process, a data collector (an agency) assumed that all respondents would be comfortable with submitting their data if the published data was anonymous. We believe that this assumption is not realistic because the increase in privacy concerns causes some respondents to refuse participation or to submit inaccurate data to such agencies. If respondents submit inaccurate data, then the usefulness of the results from analysis of the collected data cannot be guaranteed. Furthermore, we note that the level of anonymity (i.e., -anonymity) guaranteed by an agency cannot be verified by respondents since they generally do not have access to all of the data that is released. Therefore, we introduce the notion of -anonymity, where is the level of anonymity preferred by each respondent . Instead of placing full trust in an agency, our solution increases respondent confidence by allowing each to decide the preferred level of protection. As such, our protocol ensures that respondents achieve their preferred -anonymity during data collection and guarantees that the collected records are genuine and useful for data analysis.

关键词： Anonymous data collection Respondent-preferred privacy protection k-anonymity

HTML PDF 收藏

Disinfection byproducts in drinking water and regulatory compliance: A critical review

Xiaomao WANG,Yuqin MAO,Shun TANG,Hongwei YANG,Yuefeng F. XIE

《环境科学与工程前沿（英文）》 2015年第9卷第1期页码 3-15 doi: 10.1007/s11783-014-0734-1

摘要： Disinfection by-products (DBPs) are regulated in drinking water in a number of countries. This critical review focuses on the issues associated with DBP regulatory compliance, including methods for DBP analysis, occurrence levels, the regulation comparison among various countries, DBP compliance strategies, and emerging DBPs. The regulation comparison between China and the United States (US) indicated that the DBP regulations in China are more stringent based on the number of regulated compounds and maximum levels. The comparison assessment using the Information Collection Rule (ICR) database indicated that the compliance rate of 500 large US water plants under the China regulations is much lower than that under the US regulations (e.g. 62.2% versus 89.6% for total trihalomethanes). Precursor removal and alternative disinfectants are common practices for DBP regulatory compliance. DBP removal after formation, including air stripping for trihalomethane removal and biodegradation for haloacetic acid removal, have gained more acceptance in DBP control. Formation of emerging DBPs, including iodinated DBPs and nitrogenous DBPs, is one of unintended consequences of precursor removal and alternative disinfection. At much lower levels than carbonaceous DBPs, however, emerging DBPs have posed higher health risks.

关键词： Disinfection byproducts (DBPs) drinking water standards regulatory compliance alternative disinfection information collection rule (ICR) emerging DBPs

HTML PDF 收藏

Evaluate HAA removal in biologically active carbon filters using the ICR database

Hsin-hsin TUNG, Yuefeng F. XIE

《环境科学与工程前沿（英文）》 2011年第5卷第4期页码 489-496 doi: 10.1007/s11783-011-0312-8

摘要： The effects of biologically active carbon (BAC) filtration on haloacetic acid (HAA) levels in plant effluents and distribution systems were investigated using the United States Environmental Protection Agency’s Information Collection Rule (ICR) database. The results showed that average HAA5 concentrations in all locations were 20.4 μg·L and 29.6 μg·L in ICR plants with granular activated carbon (GAC) and ICR plants without GAC process, respectively. For plants without GAC, the highest HAA levels were observed in the quarters of April to June and July to September. However, for plants with GAC, the highest HAA levels were observed in the quarters of April to June and January to March. This HAA level profile inversely correlated well with water temperature, or biologic activity. For GAC plants, simulated distribution samples matched well with distribution system equivalent samples for Cl AA and THMs. For plants with and without GAC, simulated distribution samples overestimated readily biodegradable HAAs in distribution systems. The study indicated that through HAA biodegradation, GAC process plays an important role in lowering HAA levels in finished drinking water.

关键词： biologically active carbon (BAC) disinfection byproduct (DBP) granular activated carbon (GAC) haloacetic acid (HAA) Information Collection Rule (ICR)

HTML PDF 收藏

PM₁₀ emissions from industrial coal-fired chain-grate boilers

Xinghua Li, Junzan Han, Lei Duan

《环境科学与工程前沿（英文）》 2017年第11卷第6期 doi: 10.1007/s11783-017-0966-y

摘要： Industrial coal-fired boiler is an important air pollutant emission source in China. The chain-grate boiler is the most extensively used type of industrial coal-fired boiler. An electrical low-pressure impactor, and a Dekati Low Pressure Impactor were applied to determine mass and number size distributions of PM at the inlet and the outlet of the particulate emission control devices at six coal-fired chain-grate boilers. The mass size distribution of PM generated from coal-fired chain-grate boilers generally displays a bimodal distribution that contains a submicron mode and a coarse mode. The PM in the submicron mode for burning with raw coal contributes to 33%±10 % of PM emissions, much higher than those for pulverized boilers. And the PM in the submicron mode for burning with briquette contributes up to 86 % of PM emissions. Multiclones and scrubbers are not efficient for controlling PM emission. Their average collection efficiencies for sub-micron particle and super-micron particle are 34% and 78%, respectively. Operating conditions of industrial steam boilers have influence on PM generation. Peak of the submicron mode during normal operation period is larger than the start-up period.

关键词： coal-fired chain-grate boiler PM₁₀ size distribution particulate emission control devices size-dependent collection efficiency

HTML PDF 收藏

Frontier of continuous structural health monitoring system for short & medium span bridges and condition assessment

Ayaho MIYAMOTO, Risto KIVILUOMA, Akito YABE

《结构与土木工程前沿（英文）》 2019年第13卷第3期页码 569-604 doi: 10.1007/s11709-018-0498-y

摘要： It is becoming an important social problem to make maintenance and rehabilitation of existing short and medium span(10-20 m) bridges because there are a huge amount of short and medium span bridges in service in the world. The kernel of such bridge management is to develop a method of safety(condition) assessment on items which include remaining life and load carrying capacity. Bridge health monitoring using information technology and sensors is capable of providing more accurate knowledge of bridge performance than traditional strategies. The aim of this paper is to introduce a state-of-the-art on not only a rational bridge health monitoring system incorporating with the information and communication technologies for lifetime management of existing short and medium span bridges but also a continuous data collecting system designed for bridge health monitoring of mainly short and medium span bridges. In this paper, although there are some useful monitoring methods for short and medium span bridges based on the qualitative or quantitative information, mainly two advanced structural health monitoring systems are described to review and analyse the potential of utilizing the long term health monitoring in safety assessment and management issues for short and medium span bridge. The first is a special designed mobile loading device(vehicle) for short and medium span road bridges to assess the structural safety(performance) and derive optimal strategies for maintenance using reliability based method. The second is a long term health monitoring method by using the public buses as part of a public transit system (called bus monitoring system) to be applied mainly to short and medium span bridges, along with safety indices, namely, “characteristic deflection” which is relatively free from the influence of dynamic disturbances due to such factors as the roughness of the road surface, and a structural anomaly parameter.

关键词： condition assessment short & medium span bridge structural health monitoring(SHM) long-term data collection system maintenance bridge performance information technology loading vehicle(public bus) in-situ loading

HTML PDF 收藏

基于正交实验的BP神经网络预测研究

蔡安辉,刘永刚,孙国雄

《中国工程科学》 2003年第5卷第7期页码 67-71

摘要：

用不同的L₉（3⁴）正交实验方案结果作为训练学习样本集，对BP神经网络预测应用过程的策略进行了探讨，结果表明：完备的正交实验样本集是基本训练学习单元，在完备的正交实验样本集上添加或减少样本数量，所预测的结果是不可靠的；在同一类型、同一实验的条件下，完备的信息量大的正交实验样本集，能以很高的精度预测完备的信息量小的正交实验样本集；提出了一条新的实验设计思路——通过实验得出一个完备的正交实验样本集，通过计算机用BP神经网络就可以把与已知样本集有相同影响因素和水平的所有样本的值以相当高的精度预测出来，从而大大节省时间和劳力。

关键词： BP神经网络正交实验策略实验设计思路样本集

HTML PDF 收藏

我国河长制实施成效考核方法评估研究

尹海龙,葛佳宁,徐祖信,徐晋

《中国工程科学》 2022年第24卷第5期页码 169-176 doi: 10.15302/J-SSCAE-2022.05.020

摘要：

新修订的《中华人民共和国水污染防治法》增加了建立河长制的要求，从法律层面明确了各级首长对行政区域水环境治理的责任。本文在评估分析我国河长制实施成效、现有考核方法体系及其不足的基础上，提出了河湖断面综合水质评价和污水管网污染负荷截污率两种量化考核方法，以提高河长制成效考核的科学合理性。文章以上海市苏州河治理为例，介绍了综合水质考核方法的应用。分析了我国各省（区、市）的污染负荷截污率，发现全国平均仍有34%的污水未经处理排放入河道，造成河道水质反复恶化。将河湖断面综合水质评价和污染负荷截污率纳入河长考核，将会有效推动各地政府将人力、物力、财力集聚到城市排水管网改造和河道截污工作，推动水污染防治取得实实在在的成效。

关键词：河长制；综合水质；水环境质量；污染负荷；污水收集；水污染防治

HTML PDF 收藏

人类遗传病的家系收集疾病基因定位克隆与疾病基因功能的研究

夏家辉

《中国工程科学》 2000年第2卷第11期页码 1-11

摘要：

介绍了中国医学遗传学国家重点实验室在遗传病家系收集、疾病基因定位、疾病基因克隆和疾病基因功能研究方面的研究工作。用细胞遗传学G显带技术于1975年发现了一条与鼻咽癌相关的标记染色体t（1；3）（q44；p11）；1981年将睾丸决定基因（TDF）定位于Yp11.32带；1991年以来收集遗传病家系345种共590个；1996年用显微切割、PCR、微克隆技术克隆了EXT2基因；1998年用基因家族-候选疾病基因克隆方法克隆了遗传性神经性耳聋基因GJB3；1999年用连锁分析和全基因组扫描将一种遗传性弥漫性浅表性光敏性汗孔角化症定位于12q23.2带，并在基因功能研究中发现了一个新的细胞内转运蛋白。

关键词：遗传病家系基因定位和克隆基因家族-候选疾病基因克隆基因组扫描基因功能研究