资源类型

期刊论文 61

年份

2023 2

2022 1

2021 2

2019 2

2018 4

2017 2

2016 2

2015 6

2014 1

2013 5

2012 6

2011 5

2010 10

2008 3

2005 2

2003 2

2002 2

2000 2

1999 2

展开 ︾

关键词

微地震监测 4

水平井 3

优化 2

压裂 2

普光气田 2

沉井 2

油气开采 2

石油钻井 2

调整井 2

DVD 1

三江平原 1

下沉 1

下肢机器人；捕获点；步态相位；人机系统平衡 1

不锈钢 1

中医学 1

中医药现代化 1

井塔滑模 1

井灌水稻 1

井筒装备 1

展开 ︾

检索范围：

排序： 展示方式：

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

《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    

HTML PDF 收藏

Assessment of oxidative and UV-C treatments for inactivating bacterial biofilms from groundwater wells

Kyle E. MURRAY,Erin I. Manitou-ALVAREZ,Enos C. INNISS,Frank G. HEALY,Adria A. BODOUR

《环境科学与工程前沿（英文）》 2015年 第9卷 第1期   页码 39-49 doi: 10.1007/s11783-014-0699-0

摘要： Microorganisms are ubiquitous in natural environments and in water supply infrastructure including groundwater wells. Sessile-state microorganisms may build up on well surfaces as biofilms and, if excessive, cause biofouling that reduces well productivity and water quality. Conditions can be improved using biocides and other traditional well rehabilitation measures; however, biofilm regrowth is inevitable given the continuous introduction of microorganisms from the surrounding environment. Alternative and less invasive well maintenance approaches are desirable for reducing biofilm densities while also minimizing harmful disinfection-by-products. The primary objective of this research was to evaluate effectiveness of alternative treatments for inactivating microorganisms comprising biofilms. A novel approach was designed for in situ growth of biofilms on steel coupons suspended from ‘chandeliers’. After more than 100 days of in situ growth, biofilms were harvested, sampled, and baseline biofilm densities quantified through cultivation. Ultraviolet-C (UV-C) and oxidative treatments including hydrogen peroxide (H O ), ozone (O ) and mixed oxidants were then applied to the biofilms in laboratory-scale treatments. Microbial inactivation was assessed by comparing treated versus baseline biofilm densities. H O was the most effective treatment, and decreased density below baseline by as much as 3.1 orders of magnitude. Mixed oxidants were effective for the well having a lower density biofilm, decreasing density below baseline by as much as 1.4 orders of magnitude. Disparity in the response to treatment was apparent in the wells despite their spatial proximity and common aquifer source, which suggests that microbiological communities are more heterogeneous than the natural media from which they originate.

关键词： well rehabilitation     aquifer     biofouling     hydrogen peroxide     sustainability    

HTML PDF 收藏

Evaluation of aquatic rehabilitation technologies for polluted urban rivers and the case study of the

Haifeng JIA, Nan DONG, Hongtao MA,

《环境科学与工程前沿（英文）》 2010年 第4卷 第2期   页码 213-220 doi: 10.1007/s11783-010-0023-6

摘要： An index system for evaluation of technologies for urban river rehabilitation was proposed and discussed. The index system includes indicators of cost, resources, environmental improvement, and social effects. The calculation method for an objective value of each index based on its attributes and weights was presented. The Foshan Channel, which is a seriously polluted, black and malodorous urban river in Foshan City, China, was selected as a case study. The values of the attributes and the weights of the indices for the Foshan Channel were determined. The technologies for the rehabilitation of the Foshan Channel were evaluated based on this index system. Finally, a rehabilitation scheme for the Foshan Channel was proposed.

关键词： river rehabilitation     urban rivers     river pollution     multi-objective analysis     the Foshan Channel    

HTML PDF 收藏

Review of human–robot coordination control for rehabilitation based on motor function evaluation

《机械工程前沿（英文）》 2022年 第17卷 第2期 doi: 10.1007/s11465-022-0684-4

摘要： As a wearable and intelligent system, a lower limb exoskeleton rehabilitation robot can provide auxiliary rehabilitation training for patients with lower limb walking impairment/loss and address the existing problem of insufficient medical resources. One of the main elements of such a human–robot coupling system is a control system to ensure human–robot coordination. This review aims to summarise the development of human–robot coordination control and the associated research achievements and provide insight into the research challenges in promoting innovative design in such control systems. The patients’ functional disorders and clinical rehabilitation needs regarding lower limbs are analysed in detail, forming the basis for the human–robot coordination of lower limb rehabilitation robots. Then, human–robot coordination is discussed in terms of three aspects: modelling, perception and control. Based on the reviewed research, the demand for robotic rehabilitation, modelling for human–robot coupling systems with new structures and assessment methods with different etiologies based on multi-mode sensors are discussed in detail, suggesting development directions of human–robot coordination and providing a reference for relevant research.

关键词： human–robot coupling     lower limb rehabilitation     exoskeleton robot     motor assessment     dynamical model     perception    

HTML PDF 收藏

Design of active orthoses for a robotic gait rehabilitation system

A. C. VILLA-PARRA,L. BROCHE,D. DELISLE-RODRÍGUEZ,R. SAGARÓ,T. BASTOS,A. FRIZERA-NETO

《机械工程前沿（英文）》 2015年 第10卷 第3期   页码 242-254 doi: 10.1007/s11465-015-0350-1

摘要：

An active orthosis (AO) is a robotic device that assists both human gait and rehabilitation therapy. This work proposes portable AOs, one for the knee joint and another for the ankle joint. Both AOs will be used to complete a robotic system that improves gait rehabilitation. The requirements for actuator selection, the biomechanical considerations during the AO design, the finite element method, and a control approach based on electroencephalographic and surface electromyographic signals are reviewed. This work contributes to the design of AOs for users with foot drop and knee flexion impairment. However, the potential of the proposed AOs to be part of a robotic gait rehabilitation system that improves the quality of life of stroke survivors requires further investigation.

关键词： active orthosis     gait rehabilitation     electroencephalography     surface electromyography    

HTML PDF 收藏

stimuli, different responses: a pilot study assessing air pollution visibility impacts on emotional well-being

《环境科学与工程前沿（英文）》 2023年 第17卷 第2期 doi: 10.1007/s11783-023-1620-5

摘要：

● Emotional responses to visibility-reducing haze was assessed in a controlled lab.

关键词： Air pollution     Emotional wellbeing     Variability     Visual exposure     Emotional bias    

HTML PDF 收藏

靖边气田陕100井区马五1+2储层水平井开发优化

赵金省,高建英,肖曾利

《中国工程科学》 2013年 第15卷 第10期   页码 66-70

摘要：

根据研究区实际的储层特点，对水平井开发的可行性进行了分析。结果表明，陕100井区马五1+2储层地质条件适合水平井开发。在对研究区三维精细地质建模的基础上，采用数值模拟对水平井的井网方式、水平段长度、井排距、开发指标等进行了预测。结果表明，最优的井网形式是水平段平行对称布置，采用同时穿越马五12和马五13的阶梯状水平段的水平井，井距和排距均为2 100 m。预测第10年年末，阶梯状水平井的采出程度为48.78 %，比直井的采出程度高16.6 %，研究结果可以指导研究区水平井的高效开发。

关键词： 靖边气田     水平井     开发指标     井网     优化    

HTML PDF 收藏

现代建模与优化技术研究——在三江平原井灌水稻节水灌溉系统中的应用

付强

《中国工程科学》 2002年 第4卷 第6期   页码 44-55

摘要：

将SPAC模型理论变相宏观应用于三江平原井灌水稻节水灌溉系统中，将地下水、农用机井、晒水池、渠道、本田池、环境因子等纳入整体系统，在各个子系统中综合运用现代建模与优化技术，通过有关机理与理论研究，建立相关的数学模型。对地下水、晒水池、渠道及水稻水分生产函数、水稻需水量、有效降雨等6个子系统进行建模与分析，制定了非充分灌溉条件下优化灌溉制度。最后通过典型示范小区的优化设计，将节水技术组装，实现了增温5～15℃，节水171%，增产700～1000 kg/hm2的目标。

关键词： 建模     优化     三江平原     井灌水稻     节水灌溉     系统    

HTML PDF 收藏

EEG-controlled functional electrical stimulation rehabilitation for chronic stroke: system design and

《医学前沿（英文）》 2021年 第15卷 第5期   页码 740-749 doi: 10.1007/s11684-020-0794-5

摘要： Stroke is one of the most serious diseases that threaten human life and health. It is a major cause of death and disability in the clinic. New strategies for motor rehabilitation after stroke are undergoing exploration. We aimed to develop a novel artificial neural rehabilitation system, which integrates brain--computer interface (BCI) and functional electrical stimulation (FES) technologies, for limb motor function recovery after stroke. We conducted clinical trials (including controlled trials) in 32 patients with chronic stroke. Patients were randomly divided into the BCI-FES group and the neuromuscular electrical stimulation (NMES) group. The changes in outcome measures during intervention were compared between groups, and the trends of ERD values based on EEG were analyzed for BCI-FES group. Results showed that the increase in Fugl Meyer Assessment of the Upper Extremity (FMA-UE) and Kendall Manual Muscle Testing (Kendall MMT) scores of the BCI-FES group was significantly higher than that in the sham group, which indicated the practicality and superiority of the BCI-FES system in clinical practice. The change in the laterality coefficient (LC) values based on μ-ERD (ΔLCm-ERD) had high significant positive correlation with the change in FMA-UE(r= 0.6093, P=0.012), which provides theoretical basis for exploring novel objective evaluation methods.

关键词： brain–computer interface     functional electrical stimulation     electroencephalogram     laterality coefficient     chronic stroke    

HTML PDF 收藏

加挂井槽技术的研究与应用

李大全,罗振钦,胡辉,张秀林

《中国工程科学》 2011年 第13卷 第5期   页码 88-92

摘要：

为解决现有海上平台存在的预留井槽不足的问题，研究和开发了加挂井槽技术。面对海上平台的现实难题，通过对平台空间条件、钻井方式、平台结构及平台系统能力等的分析和研究，提出和确定加挂井槽的可行性，细化和完善加挂井槽的相关设计并将设计方案应用于工程实践。实践证明：加挂井槽解决了现有海上平台预留井槽不足的问题，具有结构简易、工程周期短、投资成本低等特点，能满足增打调整井的要求，经济社会效益显著。

关键词： 调整井     隔水套管     加挂井槽     结构校核    

HTML PDF 收藏

工程与人类安全和福祉

Hideaki Koizumi

《工程（英文）》 2015年 第1卷 第3期   页码 282-287 doi: 10.15302/J-ENG-2015066

HTML PDF 收藏

Application of granular solid hydrodynamics to a well-graded unbound granular material undergoing triaxial

Shixiong SONG, Qicheng SUN, Feng JIN, Chuhan ZHANG

《结构与土木工程前沿（英文）》 2013年 第7卷 第1期   页码 83-88 doi: 10.1007/s11709-012-0148-8

摘要： Unbound granular materials (UGMs) are widely used as a base or a subbase in pavement construction. They are generally well graded and exhibit a higher peak strength than that of conventional cohesionless granular materials. By using a simplified version of granular solid hydrodynamics (GSH), a set of GSH material constants is determined for a UGM material. The deviatoric stress and volumetric strain caused by triaxial compression are calculated and then compared with experimental data. The results indicate that the GSH theory is able to describe such a special type of granular materials.

关键词： granular solid hydrodynamics     unbound granular material (UGM)     triaxial tests    

HTML PDF 收藏

Water pumping analysis and experimental validation of beach well infiltration intake system in a seawater

Huan ZHANG,Shu LIU,Xuejing ZHENG,Gaofeng CHEN

《能源前沿（英文）》 2015年 第9卷 第3期   页码 335-342 doi: 10.1007/s11708-015-0365-7

摘要： Based on energy conservation equation and Darcy’s law, a model of beach well infiltration intake system applied in a seawater source heat pump system was established. The model consists of the seawater seepage and the heat transfer process. A porous medium model in a software named FLUENT was applied to simulate the seepage and the heat transfer process. This model was also validated by field experiment conducted on the seashore in Tianjin, China. The maximum relative error between simulation results and experimental results was 2.1% (less than 5%), which was acceptable in engineering application. The porosity and coefficient of thermal conductivity of the aquifer soil were determined to be 0.49 W/(m·K) and 1.46 W/(m·K), respectively in the simulation. In addition, the influencing factors of pumping water of beach well were also analyzed. The pumping water was found to increase when the distance between the beach well and the impervious boundary becomes longer, when the distance between the beach well and the supplying water source shortens, when the diameter of the beach well enlarges, and the drawdown enlarges.

关键词： water pumping analysis     experimental validation     infiltration intake system     seawater source heat pump    

HTML PDF 收藏

高压高产含硫气井测试技术及应用

王世泽,唐瑞江, 赵祚培,杜林

《中国工程科学》 2010年 第12卷 第10期   页码 56-60

摘要：

川东北海相气藏埋藏深、温度压力高、普遍含硫、平面及纵向产量变化大，测试工艺复杂，面临井下工具受限、井下事故复杂、井控及环境污染风险大等难题。在川东北高含硫气井测试实践与经验基础上，形成了高压高产含硫气井测试技术。形成了三类六套APR射孔—酸压—测试联作短期测试管柱；管柱力学分析、多级压力控制、国产抗硫及复合地面流程等测试配套工艺满足各类测试要求；以压井、防喷、防漏为主的测试应急方案及措施确保了作业安全。该技术在YB1-侧1，YB12，HB1-1D等井中成功应用，为该类气田勘探开发的顺利进行提供了技术支撑。

关键词： 高压高产     含硫     气藏     测试    

HTML PDF 收藏

Well-being analysis of GSU transformer insulation incorporating the impact on power generation using

Alagarsamy KRISHNAVEL, Dusmata Kumar MOHANTA, M. Jaya Bharata REDDY

《能源前沿（英文）》 2013年 第7卷 第3期   页码 288-299 doi: 10.1007/s11708-013-0265-7

摘要： With the prevailing power scenario, every watt-second of electrical energy has its own merit in satisfying the consumer demand. At the state of such a stringent energy demanding era, failure of a power generation equipment compounds the energy constraints which will not only result in a huge loss of generation but also have an impact on capital revenue. The unexpected failure of generator step-up (GSU) transformer is especially a major disturbance in the power system operation and leads to unscheduled outages with power delivery problems. The time lag in bringing back the equipment in service after rectification or replacement may increase the criticality as the process involves mobilization of spares and maintenance professionals. Hot atmosphere existing in the vicinity of thermal power stations running round-the-clock with more than 100% plant load factor (PLF) increases the thermal stress of the electrical insulation which leads to premature failure of windings, bushings, core laminations, etc. The healthy state of the GSU transformer has to be ensured to minimize the loss of power generation. As the predication related to failure of a GSU transformer is associated with some uncertainties, a fuzzy approach is employed in this paper along with actual field data and case studies for the well-being analysis of GSU transformer.

关键词： generator step-up (GSU) transformer     well-being analysis     dissolved gases in oil analysis (DGA)     tan delta (TD)     sweep frequency response analysis (SFRA)     fuzzy inference system (FIS)    

HTML PDF 收藏

标题 作者 时间 类型 操作

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

期刊论文

Assessment of oxidative and UV-C treatments for inactivating bacterial biofilms from groundwater wells

Kyle E. MURRAY,Erin I. Manitou-ALVAREZ,Enos C. INNISS,Frank G. HEALY,Adria A. BODOUR

期刊论文

Evaluation of aquatic rehabilitation technologies for polluted urban rivers and the case study of the

Haifeng JIA, Nan DONG, Hongtao MA,

期刊论文

Review of human–robot coordination control for rehabilitation based on motor function evaluation

期刊论文

Design of active orthoses for a robotic gait rehabilitation system

A. C. VILLA-PARRA,L. BROCHE,D. DELISLE-RODRÍGUEZ,R. SAGARÓ,T. BASTOS,A. FRIZERA-NETO

期刊论文

stimuli, different responses: a pilot study assessing air pollution visibility impacts on emotional well-being

期刊论文

靖边气田陕100井区马五1+2储层水平井开发优化

赵金省,高建英,肖曾利

期刊论文

现代建模与优化技术研究——在三江平原井灌水稻节水灌溉系统中的应用

付强

期刊论文

EEG-controlled functional electrical stimulation rehabilitation for chronic stroke: system design and

期刊论文

加挂井槽技术的研究与应用

李大全,罗振钦,胡辉,张秀林

期刊论文

工程与人类安全和福祉

Hideaki Koizumi

期刊论文

Application of granular solid hydrodynamics to a well-graded unbound granular material undergoing triaxial

Shixiong SONG, Qicheng SUN, Feng JIN, Chuhan ZHANG

期刊论文

Water pumping analysis and experimental validation of beach well infiltration intake system in a seawater

Huan ZHANG,Shu LIU,Xuejing ZHENG,Gaofeng CHEN

期刊论文

高压高产含硫气井测试技术及应用

王世泽,唐瑞江, 赵祚培,杜林

期刊论文

Well-being analysis of GSU transformer insulation incorporating the impact on power generation using

Alagarsamy KRISHNAVEL, Dusmata Kumar MOHANTA, M. Jaya Bharata REDDY

期刊论文