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Emergency design framework: a satellite preliminary scheme design

TENG Hongfei, WANG Yishou, ZHANG Bao

《机械工程前沿（英文）》 2007年 第2卷 第2期   页码 184-192 doi: 10.1007/s11465-007-0031-9

摘要： The emergency design of mechanical products or equipment (such as a satellite) is significant for disaster relief when the natural disasters occur. Most of us are unaware about the little information that is available in literature about emergency designs. Against the background of the preliminary scheme design of satellite payloads, emergency design was studied in the case of natural disasters. We presented some definitions about emergency design. Then, we proposed the basic ideas of how to realize the emergency design. These ideas were inspired by two aspects: 1) the evolutionary algorithms, the agent, the human-computer cooperation, and the collaborative design theory; 2) the emergency behaviors in ant colonies. Following the ideas, first we constructed the human computer cooperation agents (hereinafter called the HC-Agents) that combine the human intelligence with evolutionary algorithms. These HC-Agents had specific features like the division of labor in the ant colony. Second, we developed the multiagents cooperative design system on the basis of a hybrid P2P (peer-to-peer) model. Therefore, the emergency design system has shown some capabilities, such as anti-interference, adaptation, and rapid response.

关键词： significant     intelligence     P2P     hereinafter     computer cooperation    

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Design and preliminary evaluation of an exoskeleton for upper limb resistance training

Tzong-Ming WU, Dar-Zen CHEN

《机械工程前沿（英文）》 2012年 第7卷 第2期   页码 188-198 doi: 10.1007/s11465-012-0327-2

摘要：

Resistance training is a popular form of exercise recommended by national health organizations, such as the American College of Sports Medicine (ACSM) and the American Heart Association (AHA). This form of training is available for most populations. A compact design of upper limb exoskeleton mechanism for home-based resistance training using a spring-loaded upper limb exoskeleton with a three degree-of-freedom shoulder joint and a one degree-of-freedom elbow joint allows a patient or a healthy individual to move the upper limb with multiple joints in different planes. It can continuously increase the resistance by adjusting the spring length to train additional muscle groups and reduce the number of potential injuries to upper limb joints caused by the mass moment of inertia of the training equipment. The aim of this research is to perform a preliminary evaluation of the designed function by adopting an appropriate motion analysis system and experimental design to verify our prototype of the exoskeleton and determine the optimal configuration of the spring-loaded upper limb exoskeleton.

关键词： exoskeleton     free-weight exercise     upper limb     motion analysis    

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A preliminary analysis and discussion of the condominium building collapse in surfside, Florida, US,

《结构与土木工程前沿（英文）》 2021年 第15卷 第5期   页码 1097-1110 doi: 10.1007/s11709-021-0766-0

摘要： On June 24, 2021, a 40-year-old reinforced concrete flat plate structure building in Miami suffered a sudden partial collapse. This study analyzed the overall performance and key components of the collapsed building based on the building design codes (ACI-318 and GB 50010). Punching shear and post-punching performances of typical slab-column joints are also studied through the refined finite element analysis. The collapse process was simulated and visualized using a physics engine. By way of these analyses, weak design points of the collapsed building are highlighted. The differences between the reinforcement detailing of the collapsed building and the requirements of the current Chinese code are discussed, together with a comparison of the punching shear and post-punching performances. The simulated collapse procedure and debris distribution are compared with the actual collapse scenes.

关键词： progressive collapse     flat plate     simulation     punching    

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A preliminary research on wireless cantilever beam vibration sensor in bridge health monitoring

Xinlong TONG, Shanglin SONG, Linbing WANG, Hailu YANG

《结构与土木工程前沿（英文）》 2018年 第12卷 第2期   页码 207-214 doi: 10.1007/s11709-017-0406-x

摘要： According to specific bridge environment, optimal design piezoelectric cantilever beam structure by using results of theoretical calculations and simulation, verify natural frequencies of piezoelectric cantilever beam and production ability of data by experiment, thus formed a complete set of design method of piezoelectric cantilever beam. Considering natural frequency of vibration and intensity of the beam body, design a new type of piezoelectric cantilever beam structure. Paper analyzes the principle of sensor data acquisition and transmission, design a hardware integration system include signal conversion module, microcontroller module and wireless transmission module, test local read and wireless transmission for the combination structure of cantilever beam and data collection card, experimental verification of the radio piezoelectric vibrating cantilever vibration response is intact, the beam produced signal by vibration, acquisition card converts and wireless transmit data, this proved a good and intuitive linear response in simulation of bridge vibration test. Finally, the paper designed a kind of new wireless sensor of vibration cantilever beam, suitable for small bridge health monitoring based on Internet of things.

关键词： piezoelectric cantilever beam     bridge     natural frequency     wireless sensor    

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厦门翔安海底隧道修建技术初论

瞿守信

《中国工程科学》 2009年 第11卷 第7期   页码 24-29

摘要：

对厦门翔安海底隧道从桥梁隧道方案比选到跨海隧道方案的确定进行研究。介绍了在此作海底隧道方案的优越性，以及该海底隧道的特点、难点和施工技术方案，并对隧道设计、施工中所存在的不足之处进行论述。

关键词： 厦门翔安海底隧道     修建技术     经验初论    

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Optimum design and preliminary experiments of a novel parallel end traction apparatus for upper-limb

《机械工程前沿（英文）》 2021年 第16卷 第4期   页码 726-746 doi: 10.1007/s11465-021-0651-5

摘要： Robot-assisted technology has been increasingly employed in the therapy of post stroke patients to deliver high-quality treatment and alleviate therapists’ burden. This paper introduces a novel parallel end traction apparatus (PETA) to supplement equipment selection. Considering the appearance and performance of the PETA, two types of special five-bar linkage mechanisms are selected as the potential configurations of the actuation execution unit because of their compact arrangement and parallel structure. Kinematic analysis of each mechanism, i.e., position solutions and Jacobian matrix, is carried out. Subsequently, a comparative study between the two mechanisms is conducted. In the established source of nondimensional parameter synthesis, the singularity, maximum continuous workspace, and performance variation trends are analyzed. Based on the evaluation results, the final scheme with determined configuration and corresponding near-optimized nondimensional parameters is obtained. Then, a prototype is constructed. By adding a lockable translational degree of freedom in the vertical direction, the PETA can provide 2D planar exercise and 3D spatial exercise. Finally, a control system is developed for passive exercise mode based on the derived inverse position solution, and preliminary experiments are performed to verify the applicability of the PETA.

关键词： parallel mechanism     upper-limb rehabilitation     singularity and workspace analyses     performance evaluation     optimum design    

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Effects of Decoction on plasma proteome in cirrhosis: preliminary experimental study with rats

LIU Jie, WANG Jiyao, WEI Liming, LU Ye, Jin Hong

《医学前沿（英文）》 2008年 第2卷 第1期   页码 39-44 doi: 10.1007/s11684-008-0008-z

摘要： The aim of this paper is to study the effects of Decoction on the plasma proteome in cirrhotic rats. Twenty-six male Sprague-Dawley (SD) rats were randomly divided into three groups: cirrhotic model group ( = 10), treated with CCl (CCl/olive oil: v/v = 1:1); Decoction intervention group ( = 10), treated with CCl+ Decoction; and normal control group ( = 6), treated with olive oil only. After 8 weeks, blood samples were collected from the inferior vena cava to undergo bi-dimensional electrophoresis (2DE) and analysis by PDQuest 7.3 software. Differential protein spots were cut, enzyme hydrolysis was conducted, and peptide fragments extracted from the mixture underwent mass spectrometry (MS) with MALDI-TOF-TOF-MS. The liver fibrogenesis was assessed using a digital image analysis instrument of Masson’s trichrome stained sections. The fibrosis area of the Decoction was (8.9 ± 3.7)%, significantly smaller than that of the cirrhotic model group [(12.4 ± 4.7)%, < 0.05]. Ten markedly changed protein spots were identified by MALDI-TOF-TOF-MS. Eight of the 10 proteins, including plasma glutathione peroxidase, plasma glutathione peroxidase precursor, prealbumin, haptoglobin, apolipoprotein A-IV precursor, complement C4, inter-alpha-inhibitor H4 heavy chain, and serine/threonine-protein kinase microtubule-affinity regulating kinase 1 (MARK1) were expressed very lowly in the cirrhotic model group while they were expressed highly in the Decoction group. The expression of liver regeneration-related protein LRRG03 and vimentin increased in the cirrhotic model group, and reduced in the Decoction group. Some proteins related to oxidative stress, cell proliferation and transformation have changed in the plasma of cirrhosis induced by CCl. Decoction promotes protein synthesis and plays an anti-fibrotic role by anti-oxidation and accommodation of cell proliferation and transformation.

关键词： Decoction intervention     serine/threonine-protein     underwent     Decoction     glutathione peroxidase    

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Capacity estimation and preliminary strategy for reducing the release of dioxins in China

YU Gang, ZHANG Qing, HUANG Jun, CAI Zhenxiao, SUI Qian

《环境科学与工程前沿（英文）》 2007年 第1卷 第1期   页码 13-17 doi: 10.1007/s11783-007-0002-8

摘要： As a party of the Stockholm Convention on Persistent Organic Pollutants, China must submit its national implementation plan (NIP) for this convention. The strategy and action plan for reducing the release of dioxins in China are the most important components of the NIP. Three problems are key points for developing such strategy and action plan what are the key sources for applying the best available technology/best environmental practice (BAT/BEP) to reduce the release of dioxins? How about the capacity for reducing the dioxins release from the key sources? Where are the areas of priority for applying BAT/BEP? This paper shows the efforts towards the solution of these problems. The list of key sources covering about half of the total dioxins release was determined considering four criteria. The capacity of key sources were estimated based on the difference between the emission factor corresponding to the actual situation in 2004 and that corresponding to the scenario that all key sources have been applied BAT/BEP to reduce the dioxins release. The priority analysis using the geographical information system (GIS) tool has revealed that eastern provinces should be of high priority in the future reduction activities of dioxins release in China.

关键词： GIS     difference     capacity     scenario     implementation    

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Potential sources of unintentionally produced PCB, HCB, and PeCBz in China: A preliminary overview

Xiaotu Liu, Heidelore Fiedler, Wenwen Gong, Bin Wang, Gang Yu

《环境科学与工程前沿（英文）》 2018年 第12卷 第6期 doi: 10.1007/s11783-018-1036-9

摘要：

A preliminary analysis of potential sources for unintentionally produced PCB, HCB and PeCBz in China.

Activity rates of sources for reference years from 2000 to 2015 provided.

Emissions from a number of sources summarized and compared.

Implications for future research and regulation discussed.

关键词： Unintentionally produced POPs     Polychlorinated biphenyls     Hexachlorobenzene     Pentachlorobenzene     sources of releases     Annual production activities    

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Study on forced air convection cooling for electronic assemblies

LI Bin, TAO Wenquan, HE Yaling

《能源前沿（英文）》 2008年 第2卷 第2期   页码 158-163 doi: 10.1007/s11708-008-0009-2

摘要： The slotted fin concept was employed to improve the air cooling performance of plate-fin in heat sinks. Numerical simulations of laminar heat transfer and flow pressure drop were conducted for the integral plate fin, discrete plate fin and discrete slotted fin heat sinks. It is found that the performance of the discrete plate fin is better than that of the integral continuum plate fin and the performance of slotted fin is better than that of the discrete plate fin at the same pumping power of the fan. A new type of heat sink characterized by discrete and slotted fin surfaces with thinner fins and smaller spaces between fins is then proposed. Preliminary computation shows that this type of heat sink may be useful for the next generation of higher thermal load CPUs. The limit of cooling capacity for air-cooling techniques was also addressed.

关键词： concept     slotted     air-cooling     Preliminary computation     generation    

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China ADS sub-critical experimental assembly—Venus-1 and preliminary experiment

SHI Yongqian, XIA Pu, LUO Zhanglin, ZHAO Zhixiang, DING Dazhao, ZHU Qinfu, XIA Haihong, LI Jigen, ZHANG Wei, CAO Jian, QUAN Yanhui, LUO Huangda, WU Xiaofei

《能源前沿（英文）》 2007年 第1卷 第2期   页码 150-157 doi: 10.1007/s11708-007-0019-5

摘要： China s accelerator-driven sub-critical system (ADS) sub-critical experimental assembly Venus-1 and the preliminary experiment is presented. The core of Venus-1 is a coupled one of a fast neutron zone and a thermal neutron zone. The fast neutron zone is at the centre of the core and formed by natural uranium fuel. A fast neutron spectrum field can be produced in the fast neutron zone and used for the transmutation of minor actinides (MAs). The thermal neutron zone surrounds the fast neutron zone and is formed by low-enriched uranium fuel. It is a fission zone. An epithermal neutron zone between the fast neutron zone and the thermal neutron zone can be established for the transmutation of long-lived fission products (LLFP). On July 18, 2005, the first fuel element was loaded into the Venus-1 sub-critical assembly and some preliminary experiments about the sub-critical neutronics were performed. The Venus-1 can be driven by an Am-Be source or other steady neutron source (Cf-252, D-D reaction and D-T reaction) to study the effect of the external neutron source with different energies or a D-T pulsed neutron source on the dynamic characteristics.

关键词： coupled     D-D reaction     dynamic     pulsed neutron     sub-critical assembly    

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Preliminary clinical study on non-transecting anastomotic bulbomembranous urethroplasty

null

《医学前沿（英文）》 2017年 第11卷 第2期   页码 277-283 doi: 10.1007/s11684-017-0515-x

摘要：

This study aims to investigate the effect of non-transecting anastomotic urethroplasty for treatment of posterior urethral stricture. A total of 23 patients with traumatic posterior urethral stricture were enrolled and then divided into two groups. In one group, 12 patients underwent non-transecting anastomotic urethroplasty. In the other group, 11 patients underwent conventional posterior urethra end-to-end anastomosis. The effect of operation was evaluated using the following parameters: the bleeding amount during operation, operation time, IIEF-5 scores after operation, maximum flow rate (Qmax), and rating scale of quality of life (QoL). The comparison between the conventional posterior urethra end-to-end anastomosis group and the non-transecting anastomotic urethroplasty group showed no significant difference with regard to average operation time. However, a significant difference was observed between the groups with regard to the bleeding amount during operation. The patients in the group of non-transecting anastomotic urethroplasty urinated smoothly after the removal of catheter. Meanwhile, one patient from the group of conventional posterior urethra end-to-end anastomosis had difficulty urinating after the removal of catheter. Furthermore, significant differences in the operation time, bleeding amount during operation, IIEF-5 scores after operation, and rating scale of QoL were observed, whereas no significant difference was observed between urine flow rates of the two groups after operation. Overall, non-transecting anastomotic urethroplasty is effective for posterior urethra reconstruction, and it can reduce the occurrence rate of erectile dysfunction after operation.

关键词： anastomotic urethroplasty     transecting     posterior urethra reconstruction    

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Preliminary design of an SCO conversion system applied to the sodium cooled fast reactor

《能源前沿（英文）》 2021年 第15卷 第4期   页码 832-841 doi: 10.1007/s11708-021-0777-5

摘要： The supercritical carbon dioxide (SCO2) Brayton cycle has become an ideal power conversion system for sodium-cooled fast reactors (SFR) due to its high efficiency, compactness, and avoidance of sodium-water reaction. In this paper, the 1200 MWe large pool SFR (CFR1200) is used as the heat source of the system, and the sodium circuit temperature and the heat load are the operating boundaries of the cycle system. The performance of different SCO2 Brayton cycle systems and changes in key equipment performance are compared. The study indicates that the inter-stage cooling and recompression cycle has the best match with the heat source characte-ristics of the SFR, and the cycle efficiency is the highest (40.7%). Then, based on the developed system transient analysis program (FR-Sdaso), a pool-type SFR power plant system analysis model based on the inter-stage cooling and recompression cycle is established. In addition, the matching between the inter-stage cooling recompression cycle and the SFR during the load cycle of the power plant is studied. The analysis shows that when the nuclear island adopts the flow-advanced operation strategy and the carbon dioxide flowrate in the SCO2 power conversion system is adjusted with the goal of maintaining the sodium-carbon dioxide heat exchanger sodium side outlet temperature unchanged, the inter-stage cooling recompression cycle can match the operation of the SFR very well.

关键词： sodium-cooled fast reactor (SFR)     supercritical carbon dioxide (SCO2)     brayton cycle     load cycle    

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大自然给予的启发——木材仿生科学刍议

李坚,孙庆丰

《中国工程科学》 2014年 第16卷 第4期   页码 4-12

摘要：

本文有针对性地列举了自然界某些生物体所固有的智能行为和独特的自然属性；由自然现象给予的启发，阐述了构建木材仿生科学的理论基础；提出了依据生物学原理和现代技术，赋予木材奇异功能或创生新型复合材料的发展空间。

关键词： 木材     仿生科学     超疏水     气凝胶     智能     界面    

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Preliminary study on preparation of cell-free system for protein expression

CHEN Haiqin, XU Zhinan, WANG Cheng, CEN Peilin, LIAO Yuhua

《化学科学与工程前沿（英文）》 2008年 第2卷 第2期   页码 224-229 doi: 10.1007/s11705-008-0029-9

摘要： In the new era of “Omics”, the traditional techniques of protein expression in vivo can not come up with the exponential increase of genetic information. The cell-free protein synthesis system provides a new strategy of protein expression with advantages of rapid, convenient and high-throughput expression. The preparation of cell extracts, the optimization of substrate concentrations and the energy regeneration system are the key factors for the successful construction of cell-free protein expression system. In this work, the cell extract was prepared from RNase I- defective strain A19. The cell growth phase, the pressure for cell disruption and the storage condition of cell extracts were optimized. Meanwhile, the optimal substrate concentrations and the energy regeneration system were selected. Under the optimized conditions, the green fluorescent protein (GFP) reporter gene was expressed in the cell-free system with high expression level (Ca. 154 ?g/mL) which was 29 times higher than the expression level before optimization.

关键词： cell-free     regeneration     extract     information     successful construction    

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标题 作者 时间 类型 操作

Emergency design framework: a satellite preliminary scheme design

TENG Hongfei, WANG Yishou, ZHANG Bao

期刊论文

Design and preliminary evaluation of an exoskeleton for upper limb resistance training

Tzong-Ming WU, Dar-Zen CHEN

期刊论文

A preliminary analysis and discussion of the condominium building collapse in surfside, Florida, US,

期刊论文

A preliminary research on wireless cantilever beam vibration sensor in bridge health monitoring

Xinlong TONG, Shanglin SONG, Linbing WANG, Hailu YANG

期刊论文

厦门翔安海底隧道修建技术初论

瞿守信

期刊论文

Optimum design and preliminary experiments of a novel parallel end traction apparatus for upper-limb

期刊论文

Effects of Decoction on plasma proteome in cirrhosis: preliminary experimental study with rats

LIU Jie, WANG Jiyao, WEI Liming, LU Ye, Jin Hong

期刊论文

Capacity estimation and preliminary strategy for reducing the release of dioxins in China

YU Gang, ZHANG Qing, HUANG Jun, CAI Zhenxiao, SUI Qian

期刊论文

Potential sources of unintentionally produced PCB, HCB, and PeCBz in China: A preliminary overview

Xiaotu Liu, Heidelore Fiedler, Wenwen Gong, Bin Wang, Gang Yu

期刊论文

Study on forced air convection cooling for electronic assemblies

LI Bin, TAO Wenquan, HE Yaling

期刊论文

China ADS sub-critical experimental assembly—Venus-1 and preliminary experiment

SHI Yongqian, XIA Pu, LUO Zhanglin, ZHAO Zhixiang, DING Dazhao, ZHU Qinfu, XIA Haihong, LI Jigen, ZHANG Wei, CAO Jian, QUAN Yanhui, LUO Huangda, WU Xiaofei

期刊论文

Preliminary clinical study on non-transecting anastomotic bulbomembranous urethroplasty

null

期刊论文

Preliminary design of an SCO conversion system applied to the sodium cooled fast reactor

期刊论文

大自然给予的启发——木材仿生科学刍议

李坚,孙庆丰

期刊论文

Preliminary study on preparation of cell-free system for protein expression

CHEN Haiqin, XU Zhinan, WANG Cheng, CEN Peilin, LIAO Yuhua

期刊论文