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 16

年份

2022 1

2018 3

2016 1

2015 1

2014 1

2013 1

2009 1

2008 1

2007 2

2005 1

2003 1

2002 1

2001 1

展开︾

关键词

汽车强国 2

三峡工程 1

中华自然理念 1

主要矛盾 1

典型案例 1

制约因素 1

升船机 1

四维经络循行图 1

国内外 1

对称与不对称转换调制原理 1

展望 1

建议 1

建设 1

形势预判 1

总结 1

成熟度评价 1

战略思考 1

战略研究 1

新能源汽车产业 1

展开︾

检索范围：

排序：展示方式：

―Summary of investigations on rotating cavity at IDG, RWTH Aachen University

Dieter BOHN, Jing REN,

《能源前沿（英文）》 2009年第3卷第4期页码 489-497 doi: 10.1007/s11708-009-0040-y

摘要： Annular cavities are found inside rotor shafts of turbomachines with an axial or radial throughflow of cooling air, which influences the thermal efficiency and system reliability of the gas turbines. The flow and heat transfer phenomena in those cavities should be investigated in order to minimize the thermal load and guarantee the system reliability. An experimental rig is set up in the Institute of Steam and Gas Turbines, RWTH Aachen University, to analyze the flow structure inside the rotating cavity with an axial throughflow of cooling air. The corresponding 3D numerical investigation is conducted with the in-house flow solver CHTflow, in which the Coriolis force and the buoyancy force are implemented in the time-dependent Navier-Stokes equations. Both the experimental and numerical results show that the whole flow structure rotating slower than the cavity rotating speed. The flow passing the observation windows in the experimental and numerical results indicates the quite similar trajectories. The computed sequences and periods of the vortex flow structure correspond closely with those observed in the experiment. Furthermore, the numerical analysis reveals a flow pattern changing between single pair, double pair, and triple pair vortices. It is suggested that the vortices inside the cavity are created by the gravitational buoyancy force in the investigated case, while the number and strength of the vortices are controlled mainly by the Coriolis force.

关键词： rotating cavity buoyancy unsteady flow

HTML PDF 收藏

Osteopontin is a promoter for hepatocellular carcinoma metastasis: a summary of 10 years of studies

null

《医学前沿（英文）》 2014年第8卷第1期页码 24-32 doi: 10.1007/s11684-014-0312-8

摘要：

In this review, we summarize the novel findings from our series of studies on the leading metastasis-related gene, osteopontin (OPN). In our previous gene expression profiling study, OPN was identified as one of the leading genes associated with the metastasis of hepatocellular carcinoma (HCC). We focused on OPN to evaluate its prognostic values and important roles in HCC metastasis. A retrospective study of large cohorts of HCC patients demonstrated that plasma OPN level was one of the leading independent prognostic factors for HCC patients, even in the early stage of HCC, and could serve as a surrogate serologic biomarker for monitoring the treatment response and tumor recurrence after HCC resection. Using both in vitro and in vivoinvestigations, we found that OPN has an important role in metastasis and tumor growth of HCC and is an attractive potential therapeutic target for combating HCC metastasis. We also found that OPN⁺ HCC cells have much more amplifications at chromosomal regions, and promoter polymorphisms are important in the regulation of OPN expression and tumor growth and lung metastasis of HCC.

关键词： osteopontin (OPN) hepatocellular carcinoma metastasis prognosis therapeutic target biomarker genetic polymorphism

HTML PDF 收藏

FLOWERING PLANTS AND ENTOMOPHAGOUS ARTHROPODS IN THE AGRICULTURAL LANDSCAPE: A PRACTISE-ORIENTED SUMMARY

《农业科学与工程前沿（英文）》 2022年第9卷第1期页码 63-74 doi: 10.15302/J-FASE-2021427

摘要：

There is a growing demand for high-quality agricultural products and more countries have adopted landscape management by sowing flowering plants in agricultural fields as an important branch of conservation biological control. However, there has been less concern over the interactions and trade-offs between floral plants and entomophagous arthropods. This paper review progress in pollen/nectar feeding habits of entomophagous insects including parasitoids and predators which are important natural enemies of crop pests in agricultural fields. Factors that influence the preference of different guilds of natural enemies are reviewed to guide the selection of flowering plants in conservation biological control practices. Most studies find that floral resources have positive effects on both biological traits of natural enemies and their abundance and diversity, and this is believed to contribute greatly to pest control. Furthermore, the potential impacts of floral resources on crop yields are also discussed with an emphasis on a guild of entomophagous insects that provides both pest control and pollination services.

关键词： ecosystem services / flowering plants / natural enemies / nectar / pollen

HTML PDF 收藏

生态文明建设国内外经验总结分析

岳波,吴小卉,黄启飞,张林波

《中国工程科学》 2015年第17卷第8期页码 151-158

摘要：

20世纪60年代以来，面对环境污染、生态破坏、生存危机的严重威胁，西方国家在生态保护法律体系、环境经济政策、循环低碳绿色经济模式、生态保护意识培养、产业结构升级等方面开展了长期持久的工作，取得了显著成效。我国从20世纪中后期开始注重生态环境的建设与保护，到中国共产党第十八次全国代表大会将生态文明建设纳入中国特色社会主义建设“五位一体”的总体布局，生态文明已经从学术层面的探讨上升到政府的施政纲领和国家理念。在进一步推动我国生态文明进程中，我们应该做到以下几点：汲取古代生态思想精华；全面推进体制机制深化改革；强化生态环境保护法律执行；积极打造生态文明建设复合资本；大力推进产业结构调整与升级；高度重视国民生态文明素质教育。

关键词：生态文明建设国内外经验总结建议展望

HTML PDF 收藏

The summary of researches on ADS in China

XIA Haihong, ZHAO Zhixiang, LI Jigen, SHI Yongqian, HAN Yinlu, ZHU Shengyun, XU Yongli, GUAN Xialing, CUI Baoqun, FU Shinian

《能源前沿（英文）》 2007年第1卷第2期页码 135-140 doi: 10.1007/s11708-007-0017-7

摘要： The conceptual study on the accelerator driven system (ADS) that lasted for about five years ended in 1999 in China. As one project of the National Basic Research Program of China (973 Program) in the energy domain, which is sponsored by the China Ministry of Science and Technology (MOST), a five-year-program of fundamental research of ADS physics and related technology was launched in 2000 and passed national review at the end of 2005. The China Institute of Atomic Energy (CIAE), the Institute of High Energy Physics (IHEP), the Institute of Heavy Ion Physics in Peking University (PKU-IHIP) and other institutions jointly carried out the research. The research activities were focused on HPPA physics and technology, reactor physics of external source driven sub-critical assembly, nuclear data base and material study. For HPPA, a high current injector consisting of an ECR ion source, LEBT and an RFQ accelerating structure of 3.5 MeV was built. In reactor physics study, a series of neutron multiplication experimental study has been carried out and still being done. The VENUS facility has been constructed as the basic experimental platform for neutronics study in ADS blanket. It s a zero power sub-critical neutron multiplying assembly driven by external neutron produced by a pulsed neutron generator. The theoretical, experimental and simulation study on nuclear data, material properties and nuclear fuel circulation related to ADS is carrying on to provide the database for ADS system analysis. The main results on ADS related researches will be reported.

关键词： accelerator national multiplying assembly sub-critical assembly simulation

HTML PDF 收藏

The predictive value of chromosome 8p deletion for metastasis of hepatocellular carcinoma: a summary

QIN Lunxiu, TANG Zhaoyou, GUAN Xinyuan, YE Qinghai, JIA Huliang, REN Ning

《医学前沿（英文）》 2008年第2卷第3期页码 211-215 doi: 10.1007/s11684-008-0041-y

摘要： Hepatocellular carcinoma (HCC) represents an extremely poor prognostic cancer, which is mainly due to the high frequency of metastasis/recurrence after surgical operation. Exploring the molecular mechanisms involved in HCC metastasis could be helpful in the prediction and early diagnosis of HCC recurrence and could also provide new therapeutic targets for HCC metastasis. In the recent decade, we analyzed the genomic aberrations of the clinical specimens, as well as the metastatic models and cell lines of human HCC to identify the genetic markers related to HCC metastasis and to verify their clinical values in the prediction and control of metastasis of HCC. Using the comparative genomic hybridization (CGH) technique, we compared the differences of chromosomal aberrations between primary HCC tumors and their matched metastatic lesions, and found that chromosome 8p deletions might contribute to HCC metastasis. This novel finding was further confirmed by comparison between nude mice models of HCC with different metastatic potentials. By the more sensitive genome-wide microsatellite analysis, 8p deletion was defined to 8p23.3 and 8p11.2, which are two likely regions harboring metastasis-related genes of HCC. Using ‘8p-specific’ microarrays, two novel metastatic suppressors ( and ) were identified, and were proven to suppress invasion and metastasis of HCC. Clinical studies indicate that 8p deletion detected in HCC or circulating plasma DNA of patients is a useful predictor for metastatic recurrence and prognosis, even for patients with early stage HCC. These novel findings are regarded as important advances in the study of the molecular mechanisms of HCC metastasis, which provide not only a holistic view on the molecular cytogenetic bases of HCC metastasis, but also candidate regions for further study to identify metastatic suppressor genes.

关键词： sensitive genome-wide prediction genome-wide microsatellite frequency Hepatocellular carcinoma

HTML PDF 收藏

Research progress in tribo-electrochemistry and tribo-electrochemical polishing

ZHAI Wenjie

《机械工程前沿（英文）》 2007年第2卷第4期页码 463-467 doi: 10.1007/s11465-007-0080-0

摘要： In this paper, the status quo and recent progress in the research on tribo-electrochemistry in aqueous and non-aqueous media, respectively, are reviewed. Much more attention has been paid to the tribo-electrochemical mechanisms for the control of friction and wear. Based on a summary of the conventional polishing principles of hard and brittle materials, the tribo-electrochemical polishing method is proposed. The results of the preliminary test show that tribo-electrochemical polishing is promising to become a critical technology in the high efficient polishing and planarization of microelectronic materials.

关键词： tribo-electrochemical mechanisms planarization non-aqueous tribo-electrochemistry summary

HTML PDF 收藏

三峡升船机工程建设综述

赵锡锦

《中国工程科学》 2013年第15卷第9期页码 9-14

摘要：

三峡升船机由于规模巨大、技术复杂，并且同类升船机在世界上尚无建成投产的先例，一直深受国内外工程技术界关注。三峡升船机的设计、研究过程得到了国内众多科研、设计单位的大力支持，其工作成果为升船机设计的逐步完善提供了理论基础。经过方案比选，三峡升船机最终确定采用齿轮齿条爬升式，其设备构造复杂，制造、安装及土建结构施工精度要求很高，并首次采用中德联合设计方式。各阶段设计成果由三峡总公司组织三峡工程质量专家组进行最终的审查和验收。针对升船机技术难点和关键技术问题，安排了一系列专项试验研究，如“齿条、螺母柱制造技术研究”等，以检验升船机关键项目设计的合理性和可实施性。为减少塔柱变形对齿条和螺母柱安装精度的影响，对升船机施工程序进行了研究和调整，以确保升船机安全可靠运行。工程建设证明本文采取的各项管理、技术措施的科学性，确保了三峡升船机建设的顺利实施。

关键词：建设综述升船机三峡工程

HTML PDF 收藏

新材料发展现状及21世纪发展趋势研讨会论文摘要

null

《中国工程科学》 2002年第4卷第1期页码 91-93

HTML PDF 收藏

新材料发展现状及21世纪发展趋势研讨会论文摘要

《中国工程科学》 2001年第3卷第12期页码 100-101

HTML PDF 收藏

大型水电项目融资与资本运作——三峡工程10年来的融资策略及实践

李永安

《中国工程科学》 2003年第5卷第10期页码 1-7

摘要：

通过对三峡工程建设10年来的融资策略及实践的总结，深入分析了大型水电项目的融资及资本运作的基本特点，详细论述了在大型水电项目建设管理中如何优化融资结构、降低融资成本、构建持续融资和资本运作载体方式等。

关键词：水电项目融资资本运作

HTML PDF 收藏

国内外颠覆性技术研究进展跟踪与研究方法总结

孙永福,王礼恒,陆春华,孙棕檀,王崑声,徐源

《中国工程科学》 2018年第20卷第6期页码 14-23 doi: 10.15302/J-SSCAE-2018.06.003

摘要：

当前，全球科技创新进入空前密集活跃的时期，一些重大颠覆性技术不断涌现，推动新产业与新业态的迭代加速，深刻影响和改变国家力量对比，重塑世界经济结构和国际竞争格局，各国纷纷瞄准这一时代契机，积极对颠覆性技术进行早期识别与培育。本文对国内外各类颠覆性技术研究报告进行了广泛跟踪，对国内外颠覆性技术研究进展及主要采用的颠覆性技术评估与预测方法进行了归纳、分析和评价，并就促进我国颠覆性技术研究科学发展与快速成型提出集中优势资源设立专业智库群、建立科学的技术评估体系等相关建议。

关键词：颠覆性技术评估与预测方法

HTML PDF 收藏

新时代汽车强国战略研究综述（一）

钟志华,乔英俊,王建强,杨沿平,杨波,王东升,赵世佳,邓慧

《中国工程科学》 2018年第20卷第1期页码 1-10 doi: 10.15302/J-SSCAE-2018.01.001

摘要：

本文为中国工程院“汽车强国战略研究”综述的第一部分（共两部分），对汽车发展总体情况进行了梳理，分析了我国汽车发展面临的新形势和新动态，总结出我国迎来建设汽车强国新一轮重大机遇。在此基础上，阐明了新时代“汽车强国”的内涵，提出了汽车产业提质增效和汽车社会协调发展是新时代“汽车强国”的两个主要特征。最后从十个方面论述了新时代建设汽车强国的重要意义。

关键词：汽车强国汽车产业汽车社会

HTML PDF 收藏

新时代汽车强国战略研究综述（二）

钟志华,乔英俊,王建强,赵世佳,杨波,叶芳林,陈昊,贺晶晶

《中国工程科学》 2018年第20卷第1期页码 11-19 doi: 10.15302/J-SSCAE-2018.01.002

摘要：

“新时代汽车强国战略研究综述（一）”提出我国应抓住新一轮汽车变革机遇，加快推进汽车强国建设的结论。在此基础上，本文从问题出发，梳理出汽车强国建设的7个层面34项制约因素，对制约因素进行了分析研究，凝练出了10个瓶颈问题。接下来阐述了当前我国汽车发展的主要矛盾，并结合当前形势、问题与挑战对汽车强国建设进行了战略思考，提出我国需尽快启动新时代汽车强国战略的结论，并就战略实施提出了主要措施和重点方向。

关键词：汽车强国战略研究制约因素主要矛盾战略思考