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Wheel/Rail Approach is the Inevitable Choice for Beijing - Shanghai High Speed Railway——Analysis of the Present State of Maglev in Japan and Germany

Jin Lüzhong

Strategic Study of CAE 2000, Volume 2, Issue 7, Pages 22-27

Abstract: Therefore, the so-called “technical leap-forward”，is hard to find ground.

Keywords： high speed railway technical and economical comparison wheel/rail type railways maglev

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Can energy storage make off-grid photovoltaic hydrogen production system more economical?

Frontiers of Engineering Management Pages 672-694 doi: 10.1007/s42524-022-0245-x

Abstract: Under the ambitious goal of carbon neutralization, photovoltaic (PV)-driven electrolytic hydrogen (PVEH) production is emerging as a promising approach to reduce carbon emission. Considering the intermittence and variability of PV power generation, the deployment of battery energy storage can smoothen the power output. However, the investment cost of battery energy storage is pertinent to non-negligible expenses. Thus, the installation of energy-storage equipment in a PVEH system is a complex trade-off problem. The primary goals of this study are to compare the engineering economics of PVEH systems with and without energy storage, and to explore time nodes when the cost of the former scenario can compete with the latter by factoring the technology learning curve. The levelized cost of hydrogen (LCOH) is a widely used economic indicator. Represented by seven areas in seven regions of China, results show that the LCOH with and without energy storage is approximately 22.23 and 20.59 yuan/kg in 2020, respectively. In addition, as technology costs drop, the LCOH of a PVEH system with energy storage will be less than that without energy storage in 2030.

Keywords： hydrogen off-grid photovoltaic energy storage LCOH engineering economics

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Aerodynamic challenges in span length of suspension bridges

XIANG Haifan, GE Yaojun

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 2, Pages 153-162 doi: 10.1007/s11709-007-0016-0

Abstract: of extreme bridge spans is firstly discussed according to horizontal clearances for navigation and economical

Keywords： requirement reasonable limitation challenge particular economical construction

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Fused structures for safer and more economical constructions

Yu-Fei WU, Ying-Wu ZHOU, Biao HU, Xiaoxu HUANG, Scott SMITH

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 1, Pages 1-9 doi: 10.1007/s11709-019-0541-7

Abstract: safer failure mode is enforced, a fused structure requires a smaller safety factor thus leading to more economical

Keywords： fused structures structural fuse fiber-reinforced polymer concrete

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Selectively structural fractionation and economical-functionality conversion of lignocellulosic biomass

Chen Hongzhang,Qiu Weihua and Wang Lan

Strategic Study of CAE 2014, Volume 16, Issue 3, Pages 27-36

Abstract:

In this paper，an innovative biomass- refining path called“selective- fractionation and economical-functionalityestablished to prove the feasibility，reasonability and reliability of“selectivefractionation and economicalIn conclusion，“selective- fractionation and economical-functionality”of lignocellulosic materials

Keywords： biorefining heterogeneity of raw material selective-fractionation and economical-functionality industrialized

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Technological and Economical Logic for Intelligent Manufacturing

Guo Zhaohui

Strategic Study of CAE 2018, Volume 20, Issue 4, Pages 97-100 doi: 10.15302/J-SSCAE-2018.04.016

Abstract: It is shown through research and comparison, that the fundamental cause of these difficulties is the

Keywords： smart manufacture industrial Internet Industrial 4.0 Cyberspace

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Pathway to energy technical innovation and commercialization based on Internet plus DES

Huiping LIU

Frontiers in Energy 2016, Volume 10, Issue 1, Pages 65-78 doi: 10.1007/s11708-015-0391-5

Abstract: key issues for DES deployment were analyzed; five types of potential DES users and five key points of technical

Keywords： “Internet Plus” distributed energy system (DES) business model technical innovation commercialization

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COMPARISON OF POMELO (

Warangkana MAKKUMRAI, Yue HUANG, Qiang XU

Frontiers of Agricultural Science and Engineering Pages 335-352 doi: 10.15302/J-FASE-2021391

Abstract: Pomelo is a member of the genus that is a key contributor to the breeding of modern citrus cultivars. China is the largest producer of pomelo and one of the top five pomelo exporting countries. Pomelos from Thailand are also well-known for their excellent quality and flavor and are ranked in the top ten export countries. This review introduces pomelo planting locations and conditions in China and Thailand. The characteristics and qualities of some commercial pomelo cultivars in China and Thailand are summarized to introduce them to international consumers and to document their similarities and dissimilarities. Data on bioactive compounds and antioxidant capacity are also included for most Chinese and Thai pomelos to highlight how they differ in this aspect because consumers are increasingly interested in healthier foods. In addition, the sensory perception in terms of aroma, flavor, texture and taste attributes, consumer perspective and preferences are discussed.

Keywords： climate commercial cultivars fruit characteristics lycopene naringin sensory evaluation

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Family planning technical services in China

Shang-Chun WU

Frontiers of Medicine 2010, Volume 4, Issue 3, Pages 285-289 doi: 10.1007/s11684-010-0097-3

Abstract: Technical services are the key measures for implementing the family planning policy.introduction, and expansion of contraceptive methods, and also for establishment and revision of the technicalRemarkable success has been achieved in improving the quality of technical services.

Keywords： family planning contraceptive method service delivery

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Creating technical heritage object replicas in a virtual environment

Olga EGOROVA,Dmitry SHCHERBININ

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 1, Pages 108-115 doi: 10.1007/s11465-016-0363-4

Abstract:

The paper presents innovative informatics methods for creating virtual technical heritage replicas3D modeling and animation of aircrafts, spaceships, architectural-engineering buildings, and other technical

Keywords： 3D document history of science and technology technical knowledge popularization virtual environment

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On Social-technical Control of Safety Development in Economic Transition Background

Xue-qiu He,Song Li

Frontiers of Engineering Management 2015, Volume 2, Issue 3, Pages 234-240 doi: 10.15302/J-FEM-2015025

Abstract: Industrial safety and economic growth, two vital and inextricable forces affecting national culture and development, are worthy of much more interest and attention than this article can hope to generate. Following economic growth, industrial safety remains as a high priority in this nation’s quest for sustainable development. At present, while China is on its way to transforming its economic structure and growth models, talk of industrial safety appears with special regularity, for it also is undergoing profound changes as an important facet of modern China.

Keywords： safety development economic growth economic transition social-technical control

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A comparison of production system life cycle models

Rajesh ATTRI, Sandeep GROVER

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 3, Pages 305-311 doi: 10.1007/s11465-012-0332-5

Abstract:

Companies today need to keep up with the rapidly changing market conditions to stay competitive. The main issues in this paper are related to a company’s market and its competitors. The prediction of market behavior is helpful for a manufacturing enterprise to build efficient production systems. However, these predictions are usually not reliable. A production system is required to adapt to changing markets, but such requirement entails higher cost. Hence, analyzing different life cycle models of the production system is necessary. In this paper, different life cycle models of the production system are compared to evaluate the distinctive features and the limitations of each model. Furthermore, the difference between product life cycle and production life cycle is summarized, and the effect of product life cycle on production life cycle is explained. Finally, a production system life cycle model, along with key activities to be performed in each stage, is proposed specifically for the manufacturing sector.

Keywords： production system life cycle model product

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Retrospective study of the efficacy and complication of thoracoabdominal incision for nephrectomy: a comparison

Minggen YANG, Xiaokun ZHAO

Frontiers of Medicine 2009, Volume 3, Issue 2, Pages 191-196 doi: 10.1007/s11684-009-0026-5

Abstract: This retrospective study was performed to compare the outcome of thoracoabdominal incision flank incision for radical nephrectomy in the patients with large renal tumors. A questionnaire assessing postoperative pain, administration of pain medications and the return to activities and work was sent to the patients who undergoing radical nephrectomy through the 11th rib (group 1: underwent flank incision, including 96 patients) or the 9th to 10th rib (group 2: undergoing thoracoabdominal incision, including 98 patients) from 2003 to 2007 in our hospital. A case retrospective analysis assessing operation time, perioperative hemorrhage volume, size of tumor, success in the treatment of tumor thrombus in renal vein or vena cava, time length of presence of drainage tube, postoperative analgesia usage and length of stay was conducted in patients whose questionnaires were returned. A total of 56 patients (58%) in group 1 and 60 (61%) in group 2 responded to the questionnaire. Time lengths of operation and presence of abdominal drainage tube were shorter in group 2 than those in group 1. Perioperative hemorrhage volume in group 2 was obviously less than that in group 1. The mean size of tumors in group 1 was significantly smaller than that in group 2 ( < 0.0005). The success rate of treating thrombus in renal vein or vena cava in group 2 was significantly higher than that in group 1 ( <0.05). Lengths of off-bed time and stay were the same in both groups. There were no differences between groups in terms of pain severity on postoperative day 1, on day of discharge and 1 month postoperatively ( >0.05). There were no significant differences between groups in the time following surgery when pain completely disappeared, when pain medications were discontinued, and when the patient returned to daily activities and work ( >0.05). The thoracoabdominal incision provides excellent exposure and allows for early vascular control. Efficacy and complication was comparable for thoracoabdominal and flank incisions in terms of incisional pain, analgesic requirements after discharge and return to normal activities.

Keywords： surgery renal tumors nephrectomy

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IMPACTS OF TECHNICAL ENVIRONMENT ON THE ADOPTION OF ORGANIC FERTILIZERS AND BIOPESTICIDES AMONG FARMERS

Frontiers of Agricultural Science and Engineering 2023, Volume 10, Issue 1, Pages 31-47 doi: 10.15302/J-FASE-2023482

Abstract:

● Farmer adoption of organic fertilizer and biopesticides was found to be positively correlated.

Keywords： biopesticides green production organic fertilizer technical environment

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To Hold the Economical Time of Biology，to Practicea Positive View of Happiness

Gan Ziheng

Strategic Study of CAE 2007, Volume 9, Issue 2, Pages 5-11

Abstract:

As predicted,the global economy is stepping into a so called "biological economy" by 2020, which can be explained as economy mainly dominated by biological technologies. The essay discusses the proposition, definition, classification and characteristic of biological economy, also, the importance of positive view of happiness in a biological economy condition and the reason for emphasizing people's happiness achieving,and the definition of happiness philosophy. It also discusses which views of happiness should be recommended and how to practice a positive view of happiness in the scientific and technological circle in China.

Keywords： biological economy happiness positive view of happiness