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Board-invited review: Sensitivity and responses of functional groups to feed processing methods on a molecular basis 被引量:2
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作者 Peiqiang Yu 《Journal of Animal Science and Biotechnology》 SCIE CAS 2013年第1期1-4,共4页
In complex feed structures, there exist main chemical functional groups which are associated with nutrient utilization and availability and functionality. Each functional group has unique molecular structure therefore... In complex feed structures, there exist main chemical functional groups which are associated with nutrient utilization and availability and functionality. Each functional group has unique molecular structure therefore produce unique molecular vibration spectral profile. Feed processing has been used to improve nutrient utilization for many years. However, to date, there was little study on processing-induced changes of feed intrinsic structure and functional groups on a molecular basis within intact tissue. This is because limited research technique is available to study inherent structure on a molecular basis. Recently bioanalytical techniques: such as Synchrotron Infrared Microspectroscopy as well as Diffuse Reflectance Infrared Fourier Transform molecular spectroscopy have been developed. These techniques enable to detect molecular structure change within intact tissues. These techniques can prevent destruction or alteration of the intrinsic protein structures during processing for analysis. However, these techniques have not been used in animal feed and nutrition research. The objective of this review was show that with the advanced technique, sensitivity and responses of functional groups to feed processing on a molecular basis could be detected in my research team. These functional groups are highly associated with nutrient utilization in animals. 展开更多
关键词 Sensitivity and responses of functional groups Molecular structures Feed processing Nutrient utilizationand availability
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Effect Observation of Process Diabetes Group Nursing on Patients with Diabetes Mellitus 被引量:1
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作者 Menghu Zhang 《Journal of Clinical and Nursing Research》 2021年第5期104-107,共4页
Objective:Discuss the clinical effect of the process diabetes nurse group in the treatment of diabetes patients.Methods:A total of 58 patients with diabetes who received treatment in our hospital from January 2021 to ... Objective:Discuss the clinical effect of the process diabetes nurse group in the treatment of diabetes patients.Methods:A total of 58 patients with diabetes who received treatment in our hospital from January 2021 to June 2021 were selected,and the 58 patients were divided into two groups by random number table.In one group,29 patients were treated with process diabetes group nursing,which was recorded as the observation group;in the other group,29 patients were treated with conventional care,which was recorded as the control group.Nursing satisfaction,compliance behavior of patients,and adverse incidence were analyzed.Results:After nursing,the data of the two groups were summarized.The score of compliance behavior in the observation group was 91.23±4.56,which was significantly better than that in the control group(75.13土5.23).The t values of the score of compliance behavior were 12.4952,P<0.05.The qualified rate of fasting blood glucose in the observation group was 100%,which was significantly higher than that in the control group(62.07%),P<0.05.According to the questionnaire analysis,there were 18 patients in the observation group who were very satisfied,8 patients who were satisfied and 3 patients who were not satisfied,with a total satisfaction rate of 89.66%,and in the control group,there were 4 patients who were very satisfied,15 patients who were satisfied and 10 patients who were not satisfied,with a total satisfaction rate of 65.52%.The control group was significantly inferior to the observation group,and P<0.05 was regarded as statistically significant.Conclusion:Adopting the process of diabetes group nursing can effectively enhance the compliance behavior of patients,and effectively control the blood sugar index of patients,and improve the satisfaction degree of patients. 展开更多
关键词 process diabetes group nursing DIABETES Blood glucose value
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Some Group Runs Based Multivariate Control Charts for Monitoring the Process Mean Vector
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作者 Mukund Parasharam Gadre Vikas Chintaman Kakade 《Open Journal of Statistics》 2016年第6期1098-1109,共13页
In this article, we propose two control charts namely, the “Multivariate Group Runs’ (MV-GR-M)” and the “Multivariate Modified Group Runs’ (MV-MGR-M)” control charts, based on the multivariate normal processes, ... In this article, we propose two control charts namely, the “Multivariate Group Runs’ (MV-GR-M)” and the “Multivariate Modified Group Runs’ (MV-MGR-M)” control charts, based on the multivariate normal processes, for monitoring the process mean vector. Methods to obtain the design parameters and operations of these control charts are discussed. Performances of the proposed charts are compared with some existing control charts. It is verified that, the proposed charts give a significant reduction in the out-of-control “Average Time to Signal” (ATS) in the zero state, as well in the steady state compared to the Hotelling’s T2 and the synthetic T2 control charts. 展开更多
关键词 Some group Runs Based Multivariate Control Charts for Monitoring the process Mean Vector
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基于微信群区域协同急救流程管理在急性心肌梗死急诊介入治疗患者中的应用效果
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作者 李秀秀 翟佳 张亚蒙 《临床医学研究与实践》 2026年第3期141-144,共4页
目的探讨基于微信群区域协同急救流程管理在急性心肌梗死急诊介入治疗患者中的应用效果。方法纳入郑州市第三人民医院收治的94例急性心肌梗死患者为研究对象,其中2020年5月至2021年5月收治的47例患者作为对照组(实施常规干预流程),2021... 目的探讨基于微信群区域协同急救流程管理在急性心肌梗死急诊介入治疗患者中的应用效果。方法纳入郑州市第三人民医院收治的94例急性心肌梗死患者为研究对象,其中2020年5月至2021年5月收治的47例患者作为对照组(实施常规干预流程),2021年6月至2022年4月收治的47例患者作为研究组(实施基于微信群区域协同救治流程管理)。比较两组的冠状动脉造影结果、经皮冠状动脉介入治疗(PCI)情况、主要心血管事件发生情况及家属满意度。结果两组患者的罪犯血管、血管病变支数无显著差异(P>0.05)。研究组的发病至首次医疗接触(SO-to-FMC)时间、首次医疗接触至球囊扩张(FMC-to-B)时间、进门至球囊扩张(D-to-B)时间均较对照组缩短,FMC-to-B时间达标率较对照组升高(P<0.05);两组患者住院时间、病死率无显著差异(P>0.05)。研究组的主要心血管事件总发生率为29.79%,低于对照组的53.19%(P<0.05)。研究组的家属满意度为95.74%,高于对照组的82.98%(P<0.05)。结论基于微信群区域协同急救流程管理可缩短急性心肌梗死急诊介入治疗患者SO-to-FMC时间、FMC-to-B时间、D-to-B时间,提升FMC-to-B时间达标率,降低主要心血管事件发生率,且患者家属满意度较高,值得临床应用。 展开更多
关键词 急性心肌梗死 经皮冠状动脉介入治疗 微信群 区域协同急救流程管理
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The Values & Benefits of Umicore's Process Excellence Model 被引量:1
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作者 LEYRER Jurgen JANTZEN Sven 《贵金属》 CAS CSCD 北大核心 2012年第A01期288-293,共6页
We will highlight the values Umicore's unique Process Excellence Model is based upon and how these do correlate with the overall culture of Umicore. Besides, we are going to explain about the benefits for the targ... We will highlight the values Umicore's unique Process Excellence Model is based upon and how these do correlate with the overall culture of Umicore. Besides, we are going to explain about the benefits for the target industries that come along with our approach. Here, we will not mainly focus on the usually mentioned cost saving potential, but how also other aspects do create substantial value for the industries. 展开更多
关键词 material manufacturing platinum group metals special glass catalyst gauzes process excellence
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Attitudes to Group Assessments: Prospective Psychotherapists’ Experiences of Being Assessed by Fellow Students
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作者 Anette Jervelycke Billy Larsson Torsten Norlander 《Open Journal of Medical Psychology》 2017年第3期179-196,共18页
Background: The guidance of prospective therapists focused on Cognitive Behavioral Therapy (CBT) is most often made by groups of four students. However, learning therapist skills is a sensitive process that will be af... Background: The guidance of prospective therapists focused on Cognitive Behavioral Therapy (CBT) is most often made by groups of four students. However, learning therapist skills is a sensitive process that will be affected by the processes which occur within the group. Objective: The aim was to examine prospective psychotherapists’ attitudes to group assessments based on the revised version of the Cognitive Therapy Scale (CTS-R). Method: Participants were 56 students with an average age of 45.65 years (range = 31 - 64). They were recruited from psychotherapy training at the Gothenburg University and the Evidens University College in Sweden. A questionnaire was constructed in which the questions were answered by check on visual analogue scales (VAS). Results: A majority of students consisting of 38 participants (68%) had a very positive approach to group assessments, while a minority of 18 participants (32%) was more negative. Most crucial for how to answer the question of group assessments was whether they considered themselves as fairly evaluated by their student colleagues within the group and whether or not only the supervisor should make the assessments. The view of group assessments (negative or positive) was not related to age, gender, and level of education in CBT or profession. In addition, both groups had a very positive view of both the CTS-R and the supervisors. Conclusion: It was concluded that more studies with the same focus are needed to determine the extent to which the results are generalizable. 展开更多
关键词 CBT Competences CTS-R Evaluation process group Assessments PROSPECTIVE PSYCHOTHERAPISTS
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Optical time-domain differentiation based on intensive differential group delay
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作者 李政勇 余向志 吴重庆 《Chinese Physics B》 SCIE EI CAS CSCD 2011年第10期267-271,共5页
An optical time-domain differentiation scheme is proposed and demonstrated based on the intensive differential group delay in a high birefringence fibre waveguide. Results show that the differentiation waveforms agree... An optical time-domain differentiation scheme is proposed and demonstrated based on the intensive differential group delay in a high birefringence fibre waveguide. Results show that the differentiation waveforms agree well with the mathematically calculated derivatives. Both error and efficiency will increase when the birefringence fibre becomes longer, and the error rises up more quickly while the efficiency approaches to a maximum of ~0.25. By using a 1-m birefringence fibre a lower error of ~0.26% is obtained with an efficiency of 1% for the first-order differentiation of 10-ps Gaussian optical pulses, and the high-order optical differentiation up to 4th order is achieved with an error less than 3%. Due to its compact structure being easy to integrate and cascade into photonic circuits, our scheme has great potential for ultrafast signal processing. 展开更多
关键词 optical signal processing DIFFERENTIATION differential group delay
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Characteristics of coal sludge slurry prepared by a wet-grinding process 被引量:4
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作者 Ma Shaolian Wu Guoguang +4 位作者 Meng Xianliang Zhou Rui Chu Ruizhi Miao Zhenyong Qi Yueming 《International Journal of Mining Science and Technology》 SCIE EI CSCD 2016年第5期947-953,共7页
Coal sludge slurry(CSS) is an alternative fuel and a potential competitive method for sludge reduction.Based on the researches of coal water slurry, we studied CSSs by using a wet-grinding process with different types... Coal sludge slurry(CSS) is an alternative fuel and a potential competitive method for sludge reduction.Based on the researches of coal water slurry, we studied CSSs by using a wet-grinding process with different types of regional municipal sludge(sludge) in an orthogonal experiment. The sludge type,sludge mixing proportion, dosage of dispersant, and grinding time were tested in this study. The results show that water content and its occurrence characteristics in the sludge have primary hindering influences on slurry ability. The range of fixed-viscosity concentrations with raw wet sludge is from 50.78%to 44.40%(by weight), while the range is from 53.35% to 51.51%(by weight) with dry sludge. All of the CSSs exhibit shear-thinning behaviors with different variation trends, especially the CSSs with more than 15%(by weight) raw wet sludge in it. Adding the same proportion of raw wet sludge increases the thixotropic properties of CSSs and the highest area of thixotropy loop is 3065 Pa/s, while the highest value of dry sludge is 1798 Pa/s. Hydrophilic group plays an important role in adsorbing water and building three-dimension networks with other particles, which is the main reason for CSS properties.Therefore, the mechanism can be used to find the way for making high quality CSS. 展开更多
关键词 Coal sludge slurry Municipal sludge Wet-grinding process Fixed-viscosity concentration Hydrophilic groups
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柔性断丝技术在卷烟生产分组加工中的研究与应用
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作者 李自娟 王海涛 +8 位作者 邓国栋 陈娇娇 孙朔 赵海洋 吕萱 冯子贤 牛志鹏 王红素 乔宝合 《中国烟草学报》 北大核心 2025年第2期39-46,共8页
【目的】探究制丝分组加工烟丝结构分布变化对卷制适用性的影响。【方法】针对分组加工A模块采用薄板烘丝,B模块采用气流烘丝,利用柔性断丝技术分组M_(0)(A、B模块均不断丝)、M_(1)(A断丝、B不断丝)、M_(2)(A不断丝、B断丝)、M_(3)(A、... 【目的】探究制丝分组加工烟丝结构分布变化对卷制适用性的影响。【方法】针对分组加工A模块采用薄板烘丝,B模块采用气流烘丝,利用柔性断丝技术分组M_(0)(A、B模块均不断丝)、M_(1)(A断丝、B不断丝)、M_(2)(A不断丝、B断丝)、M_(3)(A、B均断丝)优化烟丝结构,分析烟丝结构变化对烟支物理指标、卷制过程的影响。【结果】4种试验模式下,制丝各工序综合稳定性系数控制在97%以上,批次间稳定性好。(1)贮丝柜出口、集丝箱和跑条工序M_(2)组烟丝结构均匀性系数高于其他3组,烟丝尺寸分布较集中,集丝箱至跑条,M_(2)组长丝转化为中短丝的转化率最高,转化为碎丝率最低,烟丝造碎最小;(2)卷制过程中M_(2)组烟支密度分布一致性系数h值较小,密度一致性较好;端部落丝量、缺嘴、过轻和过重的剔废率均改善明显;(3)柔性断丝M_(3)组卷制烟支重量标偏、吸阻标偏、密度一致性系数均较小,即3项指标稳定性优于不断丝的M0组卷制烟支样品。【结论】单独对B模块柔性断丝最有利于改善烟丝结构分布,提升卷制质量。 展开更多
关键词 烟丝结构 柔性断丝技术 分组加工 烟支烟丝密度 物理质量
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GENERALIZED INVERSE GROUP OF SIGNAL AND ITS IMPLEMENTATION WITH NEURAL NETWORKS
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作者 何明一 《Journal of Electronics(China)》 1994年第1期1-10,共10页
A new concept, the generalized inverse group (GIG) of signal, is firstly proposed and its properties, leaking coefficients and implementation with neural networks are presented. Theoretical analysis and computational ... A new concept, the generalized inverse group (GIG) of signal, is firstly proposed and its properties, leaking coefficients and implementation with neural networks are presented. Theoretical analysis and computational simulation have shown that (1) there is a group of finite length of generalized inverse signals for any given finite signal, which forms the GIG; (2) each inverse group has different leaking coefficients, thus different abnormal states; (3) each GIG can be implemented by a grouped and improved single-layer perceptron which appears with fast convergence. When used in deconvolution, the proposed GIG can form a new parallel finite length of filtering deconvolution method. On off-line processing, the computational time is reduced to O(N) from O(N2). And the less the leaking coefficient is, the more reliable the deconvolution will be. 展开更多
关键词 SIGNAL processing NEURAL networks Generalized INVERSE group DECONVOLUTION
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Improved Group Fuzzy Preference Programming Method Based on Fuzzy Random Theory
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作者 黄礼健 吴祈宗 《Journal of Beijing Institute of Technology》 EI CAS 2007年第2期237-242,共6页
A new prioritization method in the analytic hierarchy process (AHP), which improves the group fuzzy preference programming (GFPP) method, is proposed. The fuzzy random theory is applied in the new prioritization m... A new prioritization method in the analytic hierarchy process (AHP), which improves the group fuzzy preference programming (GFPP) method, is proposed. The fuzzy random theory is applied in the new prioritization method. By modifying the principle of decision making implied in the GFPP method, the improved group fuzzy preference programming (IGFPP) method is formulated as a fuzzy linear programming problem to maximize the average degree of the group satisfaction with all possible group priority vectors. The IGFPP method inherits the advantages of the GFPP method, and solves the weighting trouble existed in the GFPP method. Numerical tests indicate that the IGFPP method performs more effectively than the GFPP method in the case of very contradictive comparison judgments from decision makers. 展开更多
关键词 group decision-making analytic hierarchy process (AHP) fuzzy linear programming fuzzy random variable
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Extensional Tectonic System of Erlian Fault Basin Groupand Its Deep Background
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作者 Ren Jianye Li Sitian Faculty of Earth Resources, China University of Geosciences, Wuhan 430074 Jiao Guihao Exploration and Development Research Institute, Huabei Oil Administration Bureau, Renqiu 062552 Chen Ping Faculty of Business Administratio 《Journal of Earth Science》 SCIE CAS CSCD 1998年第3期44-49,共6页
The Erlian fault basin group, a typical Basin and Range type fault basin group, was formed during Late Jurassic to Early Cretaceous, in which there are rich coal, oil and gas resources. In the present paper the abund... The Erlian fault basin group, a typical Basin and Range type fault basin group, was formed during Late Jurassic to Early Cretaceous, in which there are rich coal, oil and gas resources. In the present paper the abundant geological and petroleum information accumulated in process of industry oil and gas exploration and development of the Erlian basin group is comprehensively analyzed, the structures related to formation of basin are systematically studied, and the complete extensional tectonic system of this basin under conditions of wide rift setting and low extensional ratio is revealed by contrasting study with Basin and Range Province of the western America. Based on the above studies and achievements of the former workers, the deep background of the basin development is treated. 展开更多
关键词 Late Mesozoic rifting extensional tectonic system deep process Erlian fault basin group.
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基于模糊网络层次分析和群决策的测试性指标分配方法
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作者 张超 房颖涛 +2 位作者 董志杰 何世烈 周振威 《系统工程与电子技术》 北大核心 2025年第8期2570-2580,共11页
合理分配测试性指标是当前装备论证过程中的一项重要工作内容。针对按故障率分配等经典方法存在的计算方式单一等问题,提出一种基于模糊网络层次分析和群决策的测试性指标分配方法。首先,构建测试性指标影响因素权重评价体系,采用三角... 合理分配测试性指标是当前装备论证过程中的一项重要工作内容。针对按故障率分配等经典方法存在的计算方式单一等问题,提出一种基于模糊网络层次分析和群决策的测试性指标分配方法。首先,构建测试性指标影响因素权重评价体系,采用三角模糊数矩阵进行评分,运用网络层次分析法进行计算,利用群决策思想避免权重冲突。其次,引入S型函数,改进测试性指标分配函数,克服线性分配的局限性。最后,在机载系统上进行测试性指标分配应用验证。结果表明,该方法不仅有效结合客观计算与主观分析的优势,而且还综合考虑各项因素,是一种更为有效的测试性指标分配方法。 展开更多
关键词 测试性指标分配 三角模糊判断矩阵 网络层次分析法 群决策 S型函数优化
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群体伤害事件院内处置流程分析及探讨
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作者 夏非 王烁 《中国急救复苏与灾害医学杂志》 2025年第8期1005-1008,共4页
目的 探讨一起道路交通事故院内处置流程,总结医疗应急实践经验,为院内应急医疗系统的建设提供建议。方法 回顾首都医科大学附属北京中医医院处置的一起道路交通事故群体伤害事件,分析院内处置流程。结果 该交通事故群体伤害事件院内处... 目的 探讨一起道路交通事故院内处置流程,总结医疗应急实践经验,为院内应急医疗系统的建设提供建议。方法 回顾首都医科大学附属北京中医医院处置的一起道路交通事故群体伤害事件,分析院内处置流程。结果 该交通事故群体伤害事件院内处置流程较为顺畅,伤员均得到及时救治并顺利出院。急诊平均滞留时间(45.30±8.60)min,显著低于相关研究数据58 min,差异有统计学意义(t=-3.904,P=0.008)。结论 交通事故群体伤害事件院内处置流程的要点在于及时启动应急预案、构建绿色通道。分次检伤、分区分级、合理分流、集中救治以及指挥者的经验均有助于事件的有序处置。 展开更多
关键词 交通事故 群体伤害 处置流程 检伤分类 应急管理
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基于青年群体情感认知的旅游文创产品动态开发策略研究 被引量:1
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作者 于雷 陈国强 +1 位作者 李爽汲 王子妍 《包装工程》 北大核心 2025年第8期164-178,共15页
目的系统地挖掘青年对旅游文创产品的情感认知影响要素并基于现有产品探索其动态开发策略。方法对22位青年进行半结构访谈并基于扎根理论探讨了情感认知4项核心范畴与下属38项影响要素。通过征询14位专家的意见并利用德尔菲法确定情感... 目的系统地挖掘青年对旅游文创产品的情感认知影响要素并基于现有产品探索其动态开发策略。方法对22位青年进行半结构访谈并基于扎根理论探讨了情感认知4项核心范畴与下属38项影响要素。通过征询14位专家的意见并利用德尔菲法确定情感认知影响要素间的因果关系,构建了系统动力学模型。在实证分析部分,以秦皇岛博物馆现有的絮语琉璃杯为案例,通过回访与层次分析法构建产品评价指标体系。结果基于情感认知初始状态,采取干预策略对4项辅助变量及下属常量仿真,探索了4项动态开发策略并以此对研究案例完成设计优化与评估。结论研究以青年的情感认知为出发点,提出了旅游文创产品的动态开发策略,期拓宽旅游文创产品的研究思路。 展开更多
关键词 情感认知 旅游文创产品 青年群体 系统动力学 扎根理论 层次分析法
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“工作专班”如何赋能政策执行:信息弥合、权威扩充与要素整合
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作者 寇晓东 向秋婵 杨琳 《甘肃行政学院学报》 2025年第5期41-53,共13页
在政策执行过程中,工作专班不仅具备监督施压功能,更能通过赋能的方式提升政府部门的政策执行效能,而既有研究相对忽视了工作专班的赋能意义。政策执行涵盖目标理解、主体行动和资源调配三个关键维度,都可借助工作专班赋能提升。基于对... 在政策执行过程中,工作专班不仅具备监督施压功能,更能通过赋能的方式提升政府部门的政策执行效能,而既有研究相对忽视了工作专班的赋能意义。政策执行涵盖目标理解、主体行动和资源调配三个关键维度,都可借助工作专班赋能提升。基于对A市农村集体“三资”合同清理专项治理工作专班为期两年半的跟踪调查,研究发现该专班推动了合同清理政策的有效执行,其赋能机制包括三个方面:一是信息弥合,专班通过组织、职责与认知整合,消弭层级间信息不对称与部门间认知偏差,增强政策目标理解;二是权威扩充,专班依托高位政治势能传导,强化牵头部门统筹力,通过话语建构将权威具象化与再生产,引导注意力聚焦,强化政策主体行动;三是要素整合,专班构建跨部门与跨层级资源网络,提升政策资源调配效能。对工作专班赋能作用的探讨,不仅为理解中国情境下政策执行逻辑提供了有益补充,也推动了政策执行理论的本土化进程。 展开更多
关键词 工作专班 政策执行 赋能机制 政策过程
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茚满双马来酰亚胺树脂制备与性能研究
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作者 马如飞 丁浩天 +5 位作者 张娅婷 郭颖 左小彪 尚呈元 郑鲲 周恒 《高分子学报》 北大核心 2025年第11期2042-2049,共8页
双马来酰亚胺树脂(简称“双马树脂”)是重要的耐高温结构树脂之一,在保证工艺性的条件下进一步提升其耐温和力学性能一直是双马树脂研究的难点.本工作设计制备了一种含茚满结构的双马来酰亚胺单体(BPM),并采用二烯丙基双酚A(DABPA)为改... 双马来酰亚胺树脂(简称“双马树脂”)是重要的耐高温结构树脂之一,在保证工艺性的条件下进一步提升其耐温和力学性能一直是双马树脂研究的难点.本工作设计制备了一种含茚满结构的双马来酰亚胺单体(BPM),并采用二烯丙基双酚A(DABPA)为改性剂制备了BPM树脂,旨在探讨茚满结构对双马树脂的工艺性、耐热性和力学性能的影响规律.研究结果表明,BPM单体的熔点仅为74℃,比二苯甲烷型双马来酰亚胺(BDM)(熔点为160℃)降低了53.7%,从而使含有BPM的BDM树脂的加工窗口由110~140℃拓宽到90~195℃,具有良好的工艺性;含BPM单体的树脂比不含BPM单体的树脂表现出优异的耐热性能,最高可使玻璃化温度提升7%(由287℃提升到308℃),冲击强度提升27%(由22 kJ/m^(2)提升到28 kJ/m^(2)).这些优异的性能源于茚满结构独特的非对称刚性结构,协同平衡了耐热、加工、力学等性能. 展开更多
关键词 双马单体 茚满基团 工艺性 耐热性 力学性能
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基于工程能力培养的“食品工艺学”课程群教学改革探索
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作者 刘志伟 罗洁 《农产品加工》 2025年第14期110-112,117,共4页
以湖南农业大学食品科学技术学院开展的食品科学与工程专业工程教育体系认证为契机,针对该专业“食品工艺学”课程群,按照工程教育专业认证“以学生为中心、以产出为导向”的理念,进行“食品工艺学”课程群教学改革探索。通过优化课程... 以湖南农业大学食品科学技术学院开展的食品科学与工程专业工程教育体系认证为契机,针对该专业“食品工艺学”课程群,按照工程教育专业认证“以学生为中心、以产出为导向”的理念,进行“食品工艺学”课程群教学改革探索。通过优化课程群教学大纲、合理设置各课程教学内容、构建科学完整的实践教学体系、改革传统的教学方式、完善课程评价机制并持续改进等途径提高工程实践能力以达到工程认证的要求。 展开更多
关键词 食品工艺学课程群 工程认证 教学改革
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上海城市河网冬季浮游植物功能群群落构建机制及其驱动因素 被引量:1
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作者 邢雅微 卢智灵 +3 位作者 王婷 徐肖莹 王丽卿 张玮 《上海海洋大学学报》 北大核心 2025年第1期56-68,共13页
浮游植物作为水体的重要初级生产者,其功能群特征在维持水生态系统稳定性方面发挥着关键作用。为揭示超大型城市河网浮游植物功能群特征和构建机制,明确影响其变化的关键因子,选取上海19条代表性中小河道,对40个位点的浮游植物功能群特... 浮游植物作为水体的重要初级生产者,其功能群特征在维持水生态系统稳定性方面发挥着关键作用。为揭示超大型城市河网浮游植物功能群特征和构建机制,明确影响其变化的关键因子,选取上海19条代表性中小河道,对40个位点的浮游植物功能群特征以及环境因子开展了调查。结果表明,本研究共鉴定出浮游植物8门175种,可划分为23个功能类群,其中B、D、J、MP、P、S1、X1、X2、X3、Y为优势功能群。聚类分析发现,中小河道40个采样点可划分为低营养盐(G1)和高营养盐(G2)两个特征组,两个特征组在ShannonWiener指数、Margalef指数、功能群群落组成以及环境因子方面,均存在显著差异(P<0.05)。群落距离衰减曲线分析以及校正随机率(Modified stochasticity ratio,MST)分析显示,上海河道浮游植物功能群的构建受到环境过滤和空间扩散限制两种因素的共同作用,且随机性过程占主导;G1组群落构建主要受环境过滤作用影响,而更高营养的G2组则主要受空间扩散作用影响。差异性分析和多元回归分析表明,水体总氮、亚硝氮、总磷、电导率和溶解氧是影响上海河道浮游植物功能群结构的主要环境因子。本研究为深入了解超大型城市河网水体生物多样性和生态功能维持机制,以及城市河网水生态系统保护提供基础资料。 展开更多
关键词 城市河道 浮游植物 功能群 环境过滤作用 随机性过程
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