Taking a heavy-duty truck as a research platform,the changing characteristics of shifting force,shift time,and slipping work are obtained through theoretical analysis and manual shift test of a real vehicle. Based on ...Taking a heavy-duty truck as a research platform,the changing characteristics of shifting force,shift time,and slipping work are obtained through theoretical analysis and manual shift test of a real vehicle. Based on the analysis of the test results,a gear-shifting control strategy of the hydraulic automated shift control system is designed and experimentally verified on the bench. By optimizing the control parameters of high-speed switching valves,a control strategy and parameters are obtained,which can meet the requirements of dynamic performance and reliability.展开更多
Through reusing software test components, automated software testing generally costs less than manual software testing. There has been much research on how to develop the reusable test components, but few fall on how ...Through reusing software test components, automated software testing generally costs less than manual software testing. There has been much research on how to develop the reusable test components, but few fall on how to estimate the reusability of test conlponents for automated testing. The purpose of this paper is to present a method of minimum reusability estimation for automated testing based on the return on investment （ROI） model. Minimum reusability is a benchmark for the whole automated testing process. If the reusability in one test execution is less than the minimum reusability, some new strategies must be adopted ill the next test execution to increase the reusability. Only by this way, we can reduce unnecessary costs and finally get a return on the investment of automated testing.展开更多
Background: The Box and Block clinical test is a validated and standardized scale for use in the clinical environment that allows the assessment of rough manipulative dexterity. Proposing virtual methods to carry out ...Background: The Box and Block clinical test is a validated and standardized scale for use in the clinical environment that allows the assessment of rough manipulative dexterity. Proposing virtual methods to carry out these assessments is an attempt to eliminate some of the subjectivity that the test may entail depending on the observer and the way in which the patient gives instructions. Applied to the assessment of skills after neurological pathologies, previous experiences in stroke patients have been found. So, this work was centered on the Spinal Cord Injury. Objective: To present the virtual application of the Box and Block scale, as well as details about its design and development for its manipulation based on Leap Motion Controller. Methodology: The relationship between the results obtained in the actual test and in the virtual application in healthy subjects and, mostly, patients with cervical spinal cord injury is analyzed, obtaining a high correlation index between both tests’ performance. Results: A high correlation index was obtained between both tests performance, the real and virtual version of the Box and Block Test. Conclusion: This virtual test can serve as an element to evaluate in the future the effectiveness of the RehabHand prototype based on virtual reality applications with a therapeutic and a rehabilitative sense that, manipulated from Leap Motion Controller, allow the improvement of the manipulative dexterity in patients with neurological diseases such as spinal cord injury.展开更多
A series of triaxial laboratory experiments are performed on thick-walled hollow cylindrical samples of boom clay.The aim of this testing program is to better understand the anisotropic deformation during the excavati...A series of triaxial laboratory experiments are performed on thick-walled hollow cylindrical samples of boom clay.The aim of this testing program is to better understand the anisotropic deformation during the excavation.The testing conditions are similar to those to be experienced by host rocks around disposal galleries for radioactive waste.X-ray computed tomography is performed at different steps for each test with the samples remaining inside the loading cell.Initial analysis of the tomography images allows of the observation of the deformation of the central hole.In addition,particles manual tracking and 3D volumetric digital image correlation processing methods are considered being used to analyze the particles displacements and the boundary deformation of the sample quantitatively.An unsymmetrical damaged zone is induced around the hole,with a reverse deformation trend being found at the boundary after unloading,which indicates that the significant anisotropic deformation of boom clay can be induced by mechanical unloading.展开更多
目的研究影响凝聚胺试验的温度参数,确定适合检测Rh系统意外抗体的最优温度条件。方法利用凝聚胺的方法检测不同稀释度的IgG型人源抗-D(原液,1∶2,1∶4,1∶8,1∶16,1∶32,1∶64)与D抗原阳性的红细胞反应,设置不同温度(25℃、37℃),加入...目的研究影响凝聚胺试验的温度参数,确定适合检测Rh系统意外抗体的最优温度条件。方法利用凝聚胺的方法检测不同稀释度的IgG型人源抗-D(原液,1∶2,1∶4,1∶8,1∶16,1∶32,1∶64)与D抗原阳性的红细胞反应,设置不同温度(25℃、37℃),加入低离子介质的反应时间4 min,分别比较抗-D的凝集积分值和红细胞解聚时间,观察凝集反应增强的效果,以此确立增强凝聚胺法的试验温度反应条件。将同样的反应条件应用于36例含Rh系统意外抗体血液标本,与凝聚胺法及抗球蛋白法(柱凝集)比较,观察增强凝聚胺法的效果。结果基于其它条件不变时,1)加入低离子介质后的孵育温度25℃与37℃,抗-D的凝集总积分值(20.9±2.025 vs 25.5±2.635)比较有差异(P<0.05)。2)抗体稀释度1∶16时孵育温度25℃与37℃,凝集积分值分别为(3.9±0.738 vs 5.8±0.632)比较有差异(P<0.05),红细胞解聚时间(62.8±8.149 vs 90.1±10.713)比较有差异(P<0.05);稀释度1∶32时孵育温度25℃与37℃,凝集积分值(2.5±0.527 vs 4.3±0.675)比较有差异(P<0.05),红细胞解聚时间(35.4±7.792 vs 57.4±10.885)比较有差异(P<0.05),其余组内没有差异。3)36例Rh系统意外抗体标本检测,当抗体效价≤2时,增强凝聚胺法阳性率更高,当抗体效价≥4时,3种方法检出率一致。结论增强凝聚胺法温度参考条件为加入低离子介质37℃孵育4 min,此温度条件应用于Rh系统意外抗体标本可达到明显的增强效果,为救治急诊输血患者增加了输血安全,值得推广使用。展开更多
基金Supported by the National High Technology Engineering Program(302011)
文摘Taking a heavy-duty truck as a research platform,the changing characteristics of shifting force,shift time,and slipping work are obtained through theoretical analysis and manual shift test of a real vehicle. Based on the analysis of the test results,a gear-shifting control strategy of the hydraulic automated shift control system is designed and experimentally verified on the bench. By optimizing the control parameters of high-speed switching valves,a control strategy and parameters are obtained,which can meet the requirements of dynamic performance and reliability.
基金Foundation item： the National Natural Science Foundation of China （No. 90718037）
文摘Through reusing software test components, automated software testing generally costs less than manual software testing. There has been much research on how to develop the reusable test components, but few fall on how to estimate the reusability of test conlponents for automated testing. The purpose of this paper is to present a method of minimum reusability estimation for automated testing based on the return on investment （ROI） model. Minimum reusability is a benchmark for the whole automated testing process. If the reusability in one test execution is less than the minimum reusability, some new strategies must be adopted ill the next test execution to increase the reusability. Only by this way, we can reduce unnecessary costs and finally get a return on the investment of automated testing.
文摘Background: The Box and Block clinical test is a validated and standardized scale for use in the clinical environment that allows the assessment of rough manipulative dexterity. Proposing virtual methods to carry out these assessments is an attempt to eliminate some of the subjectivity that the test may entail depending on the observer and the way in which the patient gives instructions. Applied to the assessment of skills after neurological pathologies, previous experiences in stroke patients have been found. So, this work was centered on the Spinal Cord Injury. Objective: To present the virtual application of the Box and Block scale, as well as details about its design and development for its manipulation based on Leap Motion Controller. Methodology: The relationship between the results obtained in the actual test and in the virtual application in healthy subjects and, mostly, patients with cervical spinal cord injury is analyzed, obtaining a high correlation index between both tests’ performance. Results: A high correlation index was obtained between both tests performance, the real and virtual version of the Box and Block Test. Conclusion: This virtual test can serve as an element to evaluate in the future the effectiveness of the RehabHand prototype based on virtual reality applications with a therapeutic and a rehabilitative sense that, manipulated from Leap Motion Controller, allow the improvement of the manipulative dexterity in patients with neurological diseases such as spinal cord injury.
基金supported by Fundamental Research Funds for the Central Universities (No.FRF-TP-14-033A1)TIMODAZ project as part of the sixth EURATOM framework programme for nuclear research and training activities (2002–2006)The Department of Diagnostic and Interventional Radiology of the CHUV and the collaboration with Laboratoire 3S-R,Grenoble are gratefully acknowledged
文摘A series of triaxial laboratory experiments are performed on thick-walled hollow cylindrical samples of boom clay.The aim of this testing program is to better understand the anisotropic deformation during the excavation.The testing conditions are similar to those to be experienced by host rocks around disposal galleries for radioactive waste.X-ray computed tomography is performed at different steps for each test with the samples remaining inside the loading cell.Initial analysis of the tomography images allows of the observation of the deformation of the central hole.In addition,particles manual tracking and 3D volumetric digital image correlation processing methods are considered being used to analyze the particles displacements and the boundary deformation of the sample quantitatively.An unsymmetrical damaged zone is induced around the hole,with a reverse deformation trend being found at the boundary after unloading,which indicates that the significant anisotropic deformation of boom clay can be induced by mechanical unloading.
文摘目的研究影响凝聚胺试验的温度参数,确定适合检测Rh系统意外抗体的最优温度条件。方法利用凝聚胺的方法检测不同稀释度的IgG型人源抗-D(原液,1∶2,1∶4,1∶8,1∶16,1∶32,1∶64)与D抗原阳性的红细胞反应,设置不同温度(25℃、37℃),加入低离子介质的反应时间4 min,分别比较抗-D的凝集积分值和红细胞解聚时间,观察凝集反应增强的效果,以此确立增强凝聚胺法的试验温度反应条件。将同样的反应条件应用于36例含Rh系统意外抗体血液标本,与凝聚胺法及抗球蛋白法(柱凝集)比较,观察增强凝聚胺法的效果。结果基于其它条件不变时,1)加入低离子介质后的孵育温度25℃与37℃,抗-D的凝集总积分值(20.9±2.025 vs 25.5±2.635)比较有差异(P<0.05)。2)抗体稀释度1∶16时孵育温度25℃与37℃,凝集积分值分别为(3.9±0.738 vs 5.8±0.632)比较有差异(P<0.05),红细胞解聚时间(62.8±8.149 vs 90.1±10.713)比较有差异(P<0.05);稀释度1∶32时孵育温度25℃与37℃,凝集积分值(2.5±0.527 vs 4.3±0.675)比较有差异(P<0.05),红细胞解聚时间(35.4±7.792 vs 57.4±10.885)比较有差异(P<0.05),其余组内没有差异。3)36例Rh系统意外抗体标本检测,当抗体效价≤2时,增强凝聚胺法阳性率更高,当抗体效价≥4时,3种方法检出率一致。结论增强凝聚胺法温度参考条件为加入低离子介质37℃孵育4 min,此温度条件应用于Rh系统意外抗体标本可达到明显的增强效果,为救治急诊输血患者增加了输血安全,值得推广使用。
