In this paper,a number of ordinary differential equation(ODE)conversion techniques for trans- formation of nonstandard ODE boundary value problems into standard forms are summarised,together with their applications to...In this paper,a number of ordinary differential equation(ODE)conversion techniques for trans- formation of nonstandard ODE boundary value problems into standard forms are summarised,together with their applications to a variety of boundary value problems in computational solid mechanics,such as eigenvalue problem,geometrical and material nonlinear problem,elastic contact problem and optimal design problems through some simple and representative examples,The advantage of such approach is that various ODE bounda- ry value problems in computational mechanics can be solved effectively in a unified manner by invoking a stand- ard ODE solver.展开更多
The public technique terrace is the research organization for providing the middle experimentation and applying research for technology conversion. Firstly, the paper analyzes the important function of the public tech...The public technique terrace is the research organization for providing the middle experimentation and applying research for technology conversion. Firstly, the paper analyzes the important function of the public technique terrace. Secondly, some suggestions on how to build up the public technique terrace are put forward from five aspects including government, enterprise, media organization, and so on.展开更多
<b>Background:</b> Peripheral block techniques for total hip arthroplasty have been used as an analgesic strategy, only a few studies described it as an anesthetic technique, so the perioperative performan...<b>Background:</b> Peripheral block techniques for total hip arthroplasty have been used as an analgesic strategy, only a few studies described it as an anesthetic technique, so the perioperative performance and safety are poorly studied. <b>Methods:</b> 78 total hip arthroplasties were prospectively observed in our hospital. Divided into 2 groups: 1) General anesthesia;and 2) Lumbar sacral plexus block anesthesia. Variables measured in both groups were: demographics, conversion to general anesthesia, total opioid doses, surgical time, blood loss, postoperative pain, use and total dose of vasopressors drugs, transfusion and ICU transfer needs, postoperative ambulation time, and length of hospital stay. T student and chi-square tests were used upon the case. A significant difference was considered when a value of p < 0.05 was obtained. Descriptive statistics were performed in frequency, percentages, variance and standard deviation. <b>Results:</b> 3 patients (7.3%) anesthetized with combined lumbar sacral plexus block were converted to general anesthesia. When comparing peripheral nerve block and general anesthesia, less intraoperative (p = 0.000) and postoperative (p = 0.002) opioid consumption were noted, less postoperative pain in PACU (p = 0.002) and in the first 24 hours (p = 0.005), as well as earlier onset of ambulation (p = 0.008) and shorter hospital stay (p = 0.031). <b>Conclusions:</b> In our study, the lumbar and sacral plexus block anesthesia technique provided anesthetic conditions to perform hip joint arthroplasty and it was proved to be advantageous in comparison to general anesthesia.展开更多
Zn–air battery is a promising energy conversion and storage technique because of its high specific energy density;however,the sluggish oxygen reduction reaction (ORR) in the cathode decreases its efficiency,thus hind...Zn–air battery is a promising energy conversion and storage technique because of its high specific energy density;however,the sluggish oxygen reduction reaction (ORR) in the cathode decreases its efficiency,thus hindering its practical application. Therefore,highly efficient electrocatalysts are required for ORR and Zn–air batteries. Herein,Co-SrCO_(3)/N-doped carbon (NC) hybrid electrocatalysts were developed through the pyrolysis of a bimetal precursor (Co,Sr). The hybrid electrocatalysts with core–shell configuration include the outer NC shells and the inner inorganic nanoparticles (SrCO_(3) with surface SrO and metallic Co). The outer NC shells had direct contributions to the ORR processes,whereas the inner inorganic nanoparticles had indirect contributions,both of which were investigated in detail,especially the important roles of SrCO_(3) with surface SrO. Together with high surface content of doped N,high charge transfer efficiency,high BET surface area,and greater surface SrO of SrCO_(3),the optimized Co-SrCO_(3)/NC-600 possesses high ORR activity,high selectivity of the apparent 4e⁻ pathway,and excellent durability. The Zn–air battery with Co-SrCO_(3)/NC-600 also shows high battery performance. This study provides a new protocol for developing highly efficient electrocatalysts for the ORR and Zn–air batteries,through using alkaline earth metal based materials.展开更多
基金The project is supported by National Natural Science Foundation of China
文摘In this paper,a number of ordinary differential equation(ODE)conversion techniques for trans- formation of nonstandard ODE boundary value problems into standard forms are summarised,together with their applications to a variety of boundary value problems in computational solid mechanics,such as eigenvalue problem,geometrical and material nonlinear problem,elastic contact problem and optimal design problems through some simple and representative examples,The advantage of such approach is that various ODE bounda- ry value problems in computational mechanics can be solved effectively in a unified manner by invoking a stand- ard ODE solver.
文摘The public technique terrace is the research organization for providing the middle experimentation and applying research for technology conversion. Firstly, the paper analyzes the important function of the public technique terrace. Secondly, some suggestions on how to build up the public technique terrace are put forward from five aspects including government, enterprise, media organization, and so on.
文摘<b>Background:</b> Peripheral block techniques for total hip arthroplasty have been used as an analgesic strategy, only a few studies described it as an anesthetic technique, so the perioperative performance and safety are poorly studied. <b>Methods:</b> 78 total hip arthroplasties were prospectively observed in our hospital. Divided into 2 groups: 1) General anesthesia;and 2) Lumbar sacral plexus block anesthesia. Variables measured in both groups were: demographics, conversion to general anesthesia, total opioid doses, surgical time, blood loss, postoperative pain, use and total dose of vasopressors drugs, transfusion and ICU transfer needs, postoperative ambulation time, and length of hospital stay. T student and chi-square tests were used upon the case. A significant difference was considered when a value of p < 0.05 was obtained. Descriptive statistics were performed in frequency, percentages, variance and standard deviation. <b>Results:</b> 3 patients (7.3%) anesthetized with combined lumbar sacral plexus block were converted to general anesthesia. When comparing peripheral nerve block and general anesthesia, less intraoperative (p = 0.000) and postoperative (p = 0.002) opioid consumption were noted, less postoperative pain in PACU (p = 0.002) and in the first 24 hours (p = 0.005), as well as earlier onset of ambulation (p = 0.008) and shorter hospital stay (p = 0.031). <b>Conclusions:</b> In our study, the lumbar and sacral plexus block anesthesia technique provided anesthetic conditions to perform hip joint arthroplasty and it was proved to be advantageous in comparison to general anesthesia.
基金supported by the National Natural Science Foundation of China(Project no.21276018)the Natural Science Foundation of Jiangsu Province of China(Project no.BK20161200)+2 种基金the Fundamental Research Funds for the Central Universities(Project no.buctrc201526)the Changzhou Sci&Tech Program(Project no.CJ20159006 and CJ20160007)support from Advanced Catalysis and Green Manufacturing Collaborative Innovation Center,Changzhou University(Project no.ACGM2016-06-02 and ACGM2016-06-03).
文摘Zn–air battery is a promising energy conversion and storage technique because of its high specific energy density;however,the sluggish oxygen reduction reaction (ORR) in the cathode decreases its efficiency,thus hindering its practical application. Therefore,highly efficient electrocatalysts are required for ORR and Zn–air batteries. Herein,Co-SrCO_(3)/N-doped carbon (NC) hybrid electrocatalysts were developed through the pyrolysis of a bimetal precursor (Co,Sr). The hybrid electrocatalysts with core–shell configuration include the outer NC shells and the inner inorganic nanoparticles (SrCO_(3) with surface SrO and metallic Co). The outer NC shells had direct contributions to the ORR processes,whereas the inner inorganic nanoparticles had indirect contributions,both of which were investigated in detail,especially the important roles of SrCO_(3) with surface SrO. Together with high surface content of doped N,high charge transfer efficiency,high BET surface area,and greater surface SrO of SrCO_(3),the optimized Co-SrCO_(3)/NC-600 possesses high ORR activity,high selectivity of the apparent 4e⁻ pathway,and excellent durability. The Zn–air battery with Co-SrCO_(3)/NC-600 also shows high battery performance. This study provides a new protocol for developing highly efficient electrocatalysts for the ORR and Zn–air batteries,through using alkaline earth metal based materials.
