Realistically there are many robot joints in the biologically inspired hexapod robot, so they will generate many complexities in the calculations of the gait and the path planning and the control variables. The softwa...Realistically there are many robot joints in the biologically inspired hexapod robot, so they will generate many complexities in the calculations of the gait and the path planning and the control variables. The software Solidworks and MSC. ADAMS are adopted to simulate and analyze the prototype model of the robot. By the simulations used in our design, the applicability of the tripod gait is validated, and the scheme which uses cubic spline curve as the endpoint of foot＇s path is feasible. The principles, methods, and processes of the simulation of hexapod robot are illustrated. A methodology is proposed to get the robot inverse solution in ADAMS, and to simplify the theoretical calculation, and further more to improve the efficiency of the design.展开更多
Inspired by nature's self-similar designs,novel honeycomb-spiderweb based self-similar hybrid cellular structures are proposed here for efficient energy absorption in impact applications.The energy absorption is e...Inspired by nature's self-similar designs,novel honeycomb-spiderweb based self-similar hybrid cellular structures are proposed here for efficient energy absorption in impact applications.The energy absorption is enhanced by optimizing the geometry and topology for a given mass.The proposed hybrid cellular structure is arrived after a thorough analysis of topologically enhanced self-similar structures.The optimized cell designs are rigorously tested considering dynamic loads involving crush and high-velocity bullet impact.Furthermore,the influence of thickness,radial connectivity,and order of patterning at the unit cell level are also investigated.The maximum crushing efficiency attained is found to be more than 95%,which is significantly higher than most existing traditional designs.Later on,the first and second-order hierarchical self-similar unit cell designs developed during crush analysis are used to prepare the cores for sandwich structures.Impact tests are performed on the developed sandwich structures using the standard 9-mm parabellum.The influence of multistaging on impact resistance is also investigated by maintaining a constant total thickness and mass of the sandwich structure.Moreover,in order to avoid layer-wise weak zones and hence,attain a uniform out-of-plane impact strength,off-setting the designs in each stage is proposed.The sandwich structures with first and second-order self-similar hybrid cores are observed to withstand impact velocities as high as 170 m/s and 270 m/s,respectively.展开更多
BACKGROUND:Due to the still sparse literature in China,the investigation of hyperoxemia management is required.Thus,we aim to conduct a retrospective study to provide more information about hyperoxemia management in i...BACKGROUND:Due to the still sparse literature in China,the investigation of hyperoxemia management is required.Thus,we aim to conduct a retrospective study to provide more information about hyperoxemia management in intensive care unit(ICU)patients.METHODS:We retrospectively screened the medical records of adult patients(age≥18 years)who required mechanical ventilation(MV)≥24 hours from January 1,2018,to December 31,2018.All arterial blood gas(ABG)tested during MV was retrieved,and MV settings were recorded.The median arterial partial pressure of oxygen(PaO2)>120 mmHg(1 mmHg=0.133 kPa)was defined as mild to moderate hyperoxemia,and PaO2>300 mmHg as extreme hyperoxemia.Intensivists’response to hyperoxemia was assessed based on the reduction of fraction of inspired oxygen(FiO2)within one hour after hyperoxemia was recorded.Multivariable logistic regression analysis was performed to determine the independent factors associated with the intensivists’response to hyperoxemia.RESULTS:A total of 592 patients were fi nally analyzed.The median Acute Physiology and Chronic Health Evaluation II(APACHE II)score was 21(15-26).The PaO2,arterial oxygen saturation(SaO2),FiO2,and positive end expiratory pressure(PEEP)were 96.4(74.0-126.0)mmHg,97.8%(95.2%-99.1%),0.4(0.4-0.5),and 5(3-6)cmH2O,respectively.Totally 174(29.39%)patients had PaO2>120 mmHg,and 19(3.21%)patients had extreme hyperoxemia at PaO2>300 mmHg.In cases of mild to moderate hyperoxemia with FiO2≤0.4,only 13(2.20%)patients had a decrease in FiO2 within one hour.The multivariable logistic regression analysis showed that a positive response was independently associated with FiO2(odds ratio[OR]1.09,95%confi dence interval[CI]1.06-1.12,P<0.001),PaO2(OR 1.01,95%CI 1.00-1.01,P=0.002),and working shifts(OR 5.09,95%CI 1.87-13.80,P=0.001).CONCLUSIONS:Hyperoxemia occurs frequently and is neglected in most cases,particularly when mild to moderate hyperoxemia,hyperoxemia with lower FiO2,hyperoxemia during night and middle-night shifts,or FiO2 less likely to be decreased.Patients may be at a risk of oxygen toxicity because of the liberal oxygen strategy.Therefore,further research is needed to improve oxygen management for patients with MV in the ICUs.展开更多
“动词原形+ing”是英语的一种常用的非谓语动词,它包括传统语法的动名词和现存分词,一般表示主动的意义,这也是-ing动词和-ed动词的主要区别之一。例如: 1.The news is inspiring.(主动) 2.He is inspired by the news.(被动) 3.The te...“动词原形+ing”是英语的一种常用的非谓语动词,它包括传统语法的动名词和现存分词,一般表示主动的意义,这也是-ing动词和-ed动词的主要区别之一。例如: 1.The news is inspiring.(主动) 2.He is inspired by the news.(被动) 3.The teacher is teaching English.(主动) 4.They are taught English in school.展开更多
2015年5月22日，山崎马扎克机床（辽宁）有限公司（以下简称“辽宁工厂”）以“INSPIRE THE FUTURE——智启未来”为主题的“未来工厂展示会暨CIMT2015回顾展”在大连隆重举行，首度向业界展示了其智能化工厂探索与实践的成果。大连市...2015年5月22日，山崎马扎克机床（辽宁）有限公司（以下简称“辽宁工厂”）以“INSPIRE THE FUTURE——智启未来”为主题的“未来工厂展示会暨CIMT2015回顾展”在大连隆重举行，首度向业界展示了其智能化工厂探索与实践的成果。大连市市委常委、金普新区、金州新区党工委书记、管委会主任张世坤到会祝贺并致辞，展开更多
ESP course design is one of the most important factors that affect ESP teaching. And different model of ESP course design will cause different teaching effect. This paper mainly analyzed ESP course design from the def...ESP course design is one of the most important factors that affect ESP teaching. And different model of ESP course design will cause different teaching effect. This paper mainly analyzed ESP course design from the definition of ESP, the categories and features of ESP, the principles of ESP course design and the models of ESP course design.展开更多
University Inspirational Speech(UIS), as a significant part of American's higher education, is considered as an encouraging, convincing and motivating lesson to students. UIS might have a great effect on student&#...University Inspirational Speech(UIS), as a significant part of American's higher education, is considered as an encouraging, convincing and motivating lesson to students. UIS might have a great effect on student's outlook of life, helping them to grow as adults armed with noble ideals and entrepreneurial spirits. In order to convey the spirit of original speakers, it is crucial to choose a proper translation theory as a direction. Based on Skopos theory, the paper studied 2014 American UIS translation from the aspect of three rules of Skopos theory, presenting the application of the theory in translation process and to find out how the Skopos theory guides a translation process.展开更多
基金Sponsored by the Ministerial Level Advanced Research Foundation(6140528)
文摘Realistically there are many robot joints in the biologically inspired hexapod robot, so they will generate many complexities in the calculations of the gait and the path planning and the control variables. The software Solidworks and MSC. ADAMS are adopted to simulate and analyze the prototype model of the robot. By the simulations used in our design, the applicability of the tripod gait is validated, and the scheme which uses cubic spline curve as the endpoint of foot＇s path is feasible. The principles, methods, and processes of the simulation of hexapod robot are illustrated. A methodology is proposed to get the robot inverse solution in ADAMS, and to simplify the theoretical calculation, and further more to improve the efficiency of the design.
基金the Science and Engineering Research Board(SERB),Department of Science and Technology,India,for funding this research through grant number SRG/2019/001581。
文摘Inspired by nature's self-similar designs,novel honeycomb-spiderweb based self-similar hybrid cellular structures are proposed here for efficient energy absorption in impact applications.The energy absorption is enhanced by optimizing the geometry and topology for a given mass.The proposed hybrid cellular structure is arrived after a thorough analysis of topologically enhanced self-similar structures.The optimized cell designs are rigorously tested considering dynamic loads involving crush and high-velocity bullet impact.Furthermore,the influence of thickness,radial connectivity,and order of patterning at the unit cell level are also investigated.The maximum crushing efficiency attained is found to be more than 95%,which is significantly higher than most existing traditional designs.Later on,the first and second-order hierarchical self-similar unit cell designs developed during crush analysis are used to prepare the cores for sandwich structures.Impact tests are performed on the developed sandwich structures using the standard 9-mm parabellum.The influence of multistaging on impact resistance is also investigated by maintaining a constant total thickness and mass of the sandwich structure.Moreover,in order to avoid layer-wise weak zones and hence,attain a uniform out-of-plane impact strength,off-setting the designs in each stage is proposed.The sandwich structures with first and second-order self-similar hybrid cores are observed to withstand impact velocities as high as 170 m/s and 270 m/s,respectively.
文摘BACKGROUND:Due to the still sparse literature in China,the investigation of hyperoxemia management is required.Thus,we aim to conduct a retrospective study to provide more information about hyperoxemia management in intensive care unit(ICU)patients.METHODS:We retrospectively screened the medical records of adult patients(age≥18 years)who required mechanical ventilation(MV)≥24 hours from January 1,2018,to December 31,2018.All arterial blood gas(ABG)tested during MV was retrieved,and MV settings were recorded.The median arterial partial pressure of oxygen(PaO2)>120 mmHg(1 mmHg=0.133 kPa)was defined as mild to moderate hyperoxemia,and PaO2>300 mmHg as extreme hyperoxemia.Intensivists’response to hyperoxemia was assessed based on the reduction of fraction of inspired oxygen(FiO2)within one hour after hyperoxemia was recorded.Multivariable logistic regression analysis was performed to determine the independent factors associated with the intensivists’response to hyperoxemia.RESULTS:A total of 592 patients were fi nally analyzed.The median Acute Physiology and Chronic Health Evaluation II(APACHE II)score was 21(15-26).The PaO2,arterial oxygen saturation(SaO2),FiO2,and positive end expiratory pressure(PEEP)were 96.4(74.0-126.0)mmHg,97.8%(95.2%-99.1%),0.4(0.4-0.5),and 5(3-6)cmH2O,respectively.Totally 174(29.39%)patients had PaO2>120 mmHg,and 19(3.21%)patients had extreme hyperoxemia at PaO2>300 mmHg.In cases of mild to moderate hyperoxemia with FiO2≤0.4,only 13(2.20%)patients had a decrease in FiO2 within one hour.The multivariable logistic regression analysis showed that a positive response was independently associated with FiO2(odds ratio[OR]1.09,95%confi dence interval[CI]1.06-1.12,P<0.001),PaO2(OR 1.01,95%CI 1.00-1.01,P=0.002),and working shifts(OR 5.09,95%CI 1.87-13.80,P=0.001).CONCLUSIONS:Hyperoxemia occurs frequently and is neglected in most cases,particularly when mild to moderate hyperoxemia,hyperoxemia with lower FiO2,hyperoxemia during night and middle-night shifts,or FiO2 less likely to be decreased.Patients may be at a risk of oxygen toxicity because of the liberal oxygen strategy.Therefore,further research is needed to improve oxygen management for patients with MV in the ICUs.
文摘“动词原形+ing”是英语的一种常用的非谓语动词,它包括传统语法的动名词和现存分词,一般表示主动的意义,这也是-ing动词和-ed动词的主要区别之一。例如: 1.The news is inspiring.(主动) 2.He is inspired by the news.(被动) 3.The teacher is teaching English.(主动) 4.They are taught English in school.
文摘2015年5月22日，山崎马扎克机床（辽宁）有限公司（以下简称“辽宁工厂”）以“INSPIRE THE FUTURE——智启未来”为主题的“未来工厂展示会暨CIMT2015回顾展”在大连隆重举行，首度向业界展示了其智能化工厂探索与实践的成果。大连市市委常委、金普新区、金州新区党工委书记、管委会主任张世坤到会祝贺并致辞，
文摘ESP course design is one of the most important factors that affect ESP teaching. And different model of ESP course design will cause different teaching effect. This paper mainly analyzed ESP course design from the definition of ESP, the categories and features of ESP, the principles of ESP course design and the models of ESP course design.
文摘University Inspirational Speech(UIS), as a significant part of American's higher education, is considered as an encouraging, convincing and motivating lesson to students. UIS might have a great effect on student's outlook of life, helping them to grow as adults armed with noble ideals and entrepreneurial spirits. In order to convey the spirit of original speakers, it is crucial to choose a proper translation theory as a direction. Based on Skopos theory, the paper studied 2014 American UIS translation from the aspect of three rules of Skopos theory, presenting the application of the theory in translation process and to find out how the Skopos theory guides a translation process.
