Amylose tris (phenylcarbamate) chiral stationary phase (ATPC-CSP) was prepared and used for optical resolution of clusters 1 and 2. n-Hexane/2-propanol ( 99/1; v/v) were found to be the most suitable mobile phase on ...Amylose tris (phenylcarbamate) chiral stationary phase (ATPC-CSP) was prepared and used for optical resolution of clusters 1 and 2. n-Hexane/2-propanol ( 99/1; v/v) were found to be the most suitable mobile phase on ATPC-CSP.展开更多
By using sonar imaging, this paper presents a new algorithm for the clustering of seabed types based on the self-organizing feature maps (SOFM) neural network. The theory as well as data processing is studied in detai...By using sonar imaging, this paper presents a new algorithm for the clustering of seabed types based on the self-organizing feature maps (SOFM) neural network. The theory as well as data processing is studied in detail. Some valuable conclusions and suggestions are given.展开更多
A new sandwiched polyoxometalate [HK11Cd4Cl2（PW9034）2]·18H2O （1）, incor- porating a unique hybrid tetranuclear cadmium cluster （abbreviated to {Cd4}） with two trivacant polyanions [B-α-PW9O34]9-, has been ...A new sandwiched polyoxometalate [HK11Cd4Cl2（PW9034）2]·18H2O （1）, incor- porating a unique hybrid tetranuclear cadmium cluster （abbreviated to {Cd4}） with two trivacant polyanions [B-α-PW9O34]9-, has been hydrothermally synthesized and structurally characterized by elemental analyses, IR spectroscopy, UV-vis, and single-crystal X-ray diffraction analysis. Crystal data for 1： monoclinic, space group C2/c, a = 19.2997（4）, b = 13.8014（3）, c = 31.9819（8） A, β = 102.764（2）°, V= 8308.3（3） A3, Z = 4, P2O86Cl2K11Cd4W18H37, Mr = 5735.13, Dc = 4.584 mg-mm-3, F（000） = 10084, μ = 26.579 mm-1, the final R = 0.0378 and wR = 0.0989 for 6558 observed reflections （I〉 2σ（I））. X-ray crystallographic study shows that the molecular structure of 1 contains four cadmium atoms. Two CdO6 distorted octahedra and two CdOsC1 distorted octahedra combine with each other in turn via edge-sharing, resulting in a regular rhomb-like cluster sandwiched between two {B-a-PW9034} units. Further, the sandwich-type polyoxoanions were connected by K＋ ions to form a complicated 3-D open-framework through connecting with each terminal O atom of the [Cd4C12（PW9O34）2]12- polyoxoanions. In addition, compound 1 exhibits photoluminescence property at room temperature and the band gap can be assessed at 3.25 eV.展开更多
We study the percolation transition in a one-species cluster aggregation network model, in which the parameter α describes the suppression on the cluster sizes. It is found that the model can exhibit four types of pe...We study the percolation transition in a one-species cluster aggregation network model, in which the parameter α describes the suppression on the cluster sizes. It is found that the model can exhibit four types of percolation transitions, two continuous percolation transitions and two discontinuous ones. Continuous and discontinuous percolation transitions can be distinguished from each other by the largest single jump. Two types of continuous percolation transitions show different behaviors in the time gap. Two types of discontinuous percolation transitions are different in the time evolution of the cluster size distribution. Moreover, we also find that the time gap may also be a measure to distinguish different discontinuous percolations in this model.展开更多
Accelerated rehabilitation surgery (ERAS) can promote postoperative recovery and reduce postoperative complications by minimizing surgically related stress, and its efficacy and safety in acute aortic dissection surge...Accelerated rehabilitation surgery (ERAS) can promote postoperative recovery and reduce postoperative complications by minimizing surgically related stress, and its efficacy and safety in acute aortic dissection surgery have been demonstrated. However, due to the particularity of acute aortic dissection, studies on the application of accelerated rehabilitation surgery in acute aortic dissection are relatively rare and there are great differences among different studies. This study adopts the method of evidence-based nursing practice accelerate rehabilitation cluster of surgical nursing strategy developed and applied to the patients with primary acute aortic dissection and adopts “accelerate rehabilitation cluster of surgical nursing strategy” and “accelerated rehabilitation cluster of surgical nursing strategies in patients with acute aortic dissection in clinical intervention”, the new nursing concept and organic combination of traditional nursing measures, using the optimal cluster nursing intervention mode, to explore the safety, effectiveness and feasibility of the intervention mode in the perioperative period of the original acute aortic dissection in patients’ cluster intervention, to accelerate the rehabilitation surgery in acute aortic dissection in the clinical care to provide a scientific basis for the operation.展开更多
目的了解丰台区食源性疾病监测中副溶血性弧菌流行状况、可疑食品、血清型、毒力基因、耐药及分子分型情况。方法对2016—2024年丰台区3家哨点医院粪便标本中检出的180株副溶血性弧菌进行流行病学分析及病原学相关检测。结果副溶血性弧...目的了解丰台区食源性疾病监测中副溶血性弧菌流行状况、可疑食品、血清型、毒力基因、耐药及分子分型情况。方法对2016—2024年丰台区3家哨点医院粪便标本中检出的180株副溶血性弧菌进行流行病学分析及病原学相关检测。结果副溶血性弧菌感染率由11.67%降至4.66%,男女间有显著差异,血清型由O3:K6型转变为O10:K4型,tdh+trh-毒力基因型占96.11%,食用海产品与副溶血性弧菌感染高度相关;副溶血性弧菌对氨苄西林(ampicillin,AMP)耐药率最高为45.00%,其他抗生素耐药率均低于5.00%,多重耐药率较低,脉冲场凝胶电泳(pulsed-field gel electrophoresis,PFGE)分型得到63种带型,其中19种带型相似度为100.00%。结论丰台区副溶血性弧菌检出率有下降趋势,血清型转变且趋于单一化,毒力基因型变化较小,引起副溶血性弧菌感染的食品为海产品;副溶血性弧菌耐药情况不严重,多重耐药较轻;分子分型聚类相对离散,但聚集疫情发生的风险仍然较高。展开更多
文摘Amylose tris (phenylcarbamate) chiral stationary phase (ATPC-CSP) was prepared and used for optical resolution of clusters 1 and 2. n-Hexane/2-propanol ( 99/1; v/v) were found to be the most suitable mobile phase on ATPC-CSP.
基金Supported by the National 863 High-Tech Program of China (No. 2007AA12Z326)
文摘By using sonar imaging, this paper presents a new algorithm for the clustering of seabed types based on the self-organizing feature maps (SOFM) neural network. The theory as well as data processing is studied in detail. Some valuable conclusions and suggestions are given.
基金Supported by theNNSFC(No.51108122)Open Project of State Key Laboratory of Urban Water Resource and Environment,Harbin Institute of Technology(No.QA201025)+1 种基金Fundamental Research Funds for the Central Universities(No.HIT.NSRIF.2010053)Science and Technology Innovation Talents Special Foundation of Harbin(2010RFQXG035 and 2007RFXXG018)
文摘A new sandwiched polyoxometalate [HK11Cd4Cl2（PW9034）2]·18H2O （1）, incor- porating a unique hybrid tetranuclear cadmium cluster （abbreviated to {Cd4}） with two trivacant polyanions [B-α-PW9O34]9-, has been hydrothermally synthesized and structurally characterized by elemental analyses, IR spectroscopy, UV-vis, and single-crystal X-ray diffraction analysis. Crystal data for 1： monoclinic, space group C2/c, a = 19.2997（4）, b = 13.8014（3）, c = 31.9819（8） A, β = 102.764（2）°, V= 8308.3（3） A3, Z = 4, P2O86Cl2K11Cd4W18H37, Mr = 5735.13, Dc = 4.584 mg-mm-3, F（000） = 10084, μ = 26.579 mm-1, the final R = 0.0378 and wR = 0.0989 for 6558 observed reflections （I〉 2σ（I））. X-ray crystallographic study shows that the molecular structure of 1 contains four cadmium atoms. Two CdO6 distorted octahedra and two CdOsC1 distorted octahedra combine with each other in turn via edge-sharing, resulting in a regular rhomb-like cluster sandwiched between two {B-a-PW9034} units. Further, the sandwich-type polyoxoanions were connected by K＋ ions to form a complicated 3-D open-framework through connecting with each terminal O atom of the [Cd4C12（PW9O34）2]12- polyoxoanions. In addition, compound 1 exhibits photoluminescence property at room temperature and the band gap can be assessed at 3.25 eV.
基金Supported by the National Natural Science Foundation of China under Grant Nos 11575036 and 11505016
文摘We study the percolation transition in a one-species cluster aggregation network model, in which the parameter α describes the suppression on the cluster sizes. It is found that the model can exhibit four types of percolation transitions, two continuous percolation transitions and two discontinuous ones. Continuous and discontinuous percolation transitions can be distinguished from each other by the largest single jump. Two types of continuous percolation transitions show different behaviors in the time gap. Two types of discontinuous percolation transitions are different in the time evolution of the cluster size distribution. Moreover, we also find that the time gap may also be a measure to distinguish different discontinuous percolations in this model.
文摘Accelerated rehabilitation surgery (ERAS) can promote postoperative recovery and reduce postoperative complications by minimizing surgically related stress, and its efficacy and safety in acute aortic dissection surgery have been demonstrated. However, due to the particularity of acute aortic dissection, studies on the application of accelerated rehabilitation surgery in acute aortic dissection are relatively rare and there are great differences among different studies. This study adopts the method of evidence-based nursing practice accelerate rehabilitation cluster of surgical nursing strategy developed and applied to the patients with primary acute aortic dissection and adopts “accelerate rehabilitation cluster of surgical nursing strategy” and “accelerated rehabilitation cluster of surgical nursing strategies in patients with acute aortic dissection in clinical intervention”, the new nursing concept and organic combination of traditional nursing measures, using the optimal cluster nursing intervention mode, to explore the safety, effectiveness and feasibility of the intervention mode in the perioperative period of the original acute aortic dissection in patients’ cluster intervention, to accelerate the rehabilitation surgery in acute aortic dissection in the clinical care to provide a scientific basis for the operation.
文摘目的了解丰台区食源性疾病监测中副溶血性弧菌流行状况、可疑食品、血清型、毒力基因、耐药及分子分型情况。方法对2016—2024年丰台区3家哨点医院粪便标本中检出的180株副溶血性弧菌进行流行病学分析及病原学相关检测。结果副溶血性弧菌感染率由11.67%降至4.66%,男女间有显著差异,血清型由O3:K6型转变为O10:K4型,tdh+trh-毒力基因型占96.11%,食用海产品与副溶血性弧菌感染高度相关;副溶血性弧菌对氨苄西林(ampicillin,AMP)耐药率最高为45.00%,其他抗生素耐药率均低于5.00%,多重耐药率较低,脉冲场凝胶电泳(pulsed-field gel electrophoresis,PFGE)分型得到63种带型,其中19种带型相似度为100.00%。结论丰台区副溶血性弧菌检出率有下降趋势,血清型转变且趋于单一化,毒力基因型变化较小,引起副溶血性弧菌感染的食品为海产品;副溶血性弧菌耐药情况不严重,多重耐药较轻;分子分型聚类相对离散,但聚集疫情发生的风险仍然较高。
