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创新创业新途径——物理实验仪器的创新设计与改进 认领
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作者 熊泽本 《物理通报》 2021年第1期104-109,共6页
总结了我国创新创业教育的发展历程与现状,提出了创新创业教育与物理学专业教育相融合的实施手段与实证方法,提出结合专业特点,依托物理实验室,开展物理实验仪器的创新设计与改进是切实可行而又理想的寻找创新项目、提高创新能力、形成... 总结了我国创新创业教育的发展历程与现状,提出了创新创业教育与物理学专业教育相融合的实施手段与实证方法,提出结合专业特点,依托物理实验室,开展物理实验仪器的创新设计与改进是切实可行而又理想的寻找创新项目、提高创新能力、形成创新创业成果的绝佳办法. 展开更多
关键词 创新创业 实验仪器 设计 改进
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两种离心程序制备的富血小板纤维蛋白结构分析 认领
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作者 毕庆伟 刘承璞 +2 位作者 李岩 赵雯雯 韩梅 《中国组织工程研究》 CAS 北大核心 2021年第22期3534-3539,共6页
背景:富血小板纤维蛋白因其特性已在临床中广泛应用,但不同离心程序制造出的纤维蛋白结构及成分会有不同,进而影响临床效果。目的:比较两种特定离心程序制备的富血小板纤维蛋白的组织特点。方法:采集40例自愿捐献者的静脉血,随机分2组,... 背景:富血小板纤维蛋白因其特性已在临床中广泛应用,但不同离心程序制造出的纤维蛋白结构及成分会有不同,进而影响临床效果。目的:比较两种特定离心程序制备的富血小板纤维蛋白的组织特点。方法:采集40例自愿捐献者的静脉血,随机分2组,每组20例,一组通过低速离心(1500 r/min离心14 min)程序获得改良富血小板纤维蛋白,另一组通过中速离心(3000 r/min离心10 min)程序获得传统白细胞富血小板纤维蛋白。通过苏木精-伊红染色、免疫组化技术、扫描电镜及透射电镜观察两组纤维蛋白中的白细胞、纤维蛋白基质分布情况及差异。结果与结论:①苏木精-伊红染色:两组纤维蛋白均含有较多白细胞,多集中在中间层并偏向于红细胞端层,凝胶层大部分为纤维蛋白基质,其中改良富血小板纤维蛋白中的白细胞在凝胶层有一些散在均匀分布;②免疫组化:两组纤维蛋白在中间层区域含有大量白细胞,包括单核细胞和中性粒细胞,改良富血小板纤维蛋白中的中性粒细胞比例大于白细胞富血小板纤维蛋白(P﹤0.05),两组单核细胞比例比较差异无显著性意义(P>0.05);③扫描电镜:两组纤维蛋白的白细胞分布广泛,其中改良富血小板纤维蛋白中纤维蛋白基质空间内白细胞和血小板数量稍多,纤维基质条索排列略紧密;④透射电镜:两组纤维蛋白中间层聚集较多的中性粒细胞、单核细胞,血小板密集并含量较多,纤维蛋白基质排列致密,其中改良富血小板纤维蛋白中的纤维基质排列略密集,白细胞含量及血小板稍多;⑤结果表明:因含有的白细胞数量差别,改良富血小板纤维蛋白可能比白细胞富血小板纤维蛋白在促进组织愈合中发挥更积极的作用。 展开更多
关键词 材料 富血小板纤维蛋白 改良 离心 组织工程 炎症 中性粒细胞 单核细胞 血小板
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文章速递淡水磷酸盐氧同位素前处理方法的优化 认领
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作者 薛珂 张润宇 +4 位作者 安宁 陈敬安 邹银洪 刘勇 张志 《湖泊科学》 EI CAS CSCD 北大核心 2021年第1期319-326,I0001,共9页
磷是地表水体中的关键性营养盐,在水生生态系统的物质循环与能量流动方面发挥着重要作用,研究水体中磷的来源、转化与归趋对于了解水环境的演变过程与科学保护具有重要意义.近年来,磷酸盐氧同位素(δ18 O P)技术已逐渐应用于淡水环境中... 磷是地表水体中的关键性营养盐,在水生生态系统的物质循环与能量流动方面发挥着重要作用,研究水体中磷的来源、转化与归趋对于了解水环境的演变过程与科学保护具有重要意义.近年来,磷酸盐氧同位素(δ18 O P)技术已逐渐应用于淡水环境中磷的来源示踪与生物地球化学循环研究,其样品前处理主要沿用海水方法体系.相比而言,淡水样品中PO 3-4浓度通常较低,有机质和干扰离子含量却较高,复杂的样品前处理过程极大地制约了δ18 O P分析在淡水环境体系的广泛应用.为此,本研究针对现有海水样品δ18 O P前处理方法在地表淡水环境的适用性加以检验,并进行了三点优化改进:①将MAGIC沉淀步骤使用的MgCl 2替换为Mg(NO 3)2,避免了Cl-的干扰,减少AgCl杂质的生成;②调节生成Ag3PO4溶液pH值为8.0,保证Ag3PO4沉淀快速完全;③对Ag3PO4沉淀过程采用避光处理,降低了AgNO 3及Ag3PO4可能的光解影响,提高了Ag3PO4的纯度,使δ18 O P的测试结果更为准确.本改进方法为后续利用δ18 O P技术深入探究淡水环境中磷的生物地球化学循环与生态环境效应提供了有益的方法借鉴. 展开更多
关键词 淡水环境 磷酸盐氧同位素 前处理方法 改进
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文章速递回转减速机空行程的检测和改进 认领
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作者 黄春有 《机械工程师》 北大核心 2021年第1期16-18,共3页
介绍了回转减速机空行程的检测,分析了产生空行程的各种原因,并针对这些原因进行回转减速机做出改进。
关键词 空行程 检测 改进
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文章速递改进非语言性沟通技巧对ICU护理的影响 认领
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作者 刘晓杰 《中国继续医学教育》 2021年第1期179-182,共4页
目的评价改进非语言性沟通技巧的运用对ICU护理工作质量以及患者满意度等方面的影响,以促进ICU患者康复。方法选择本院ICU收治的患者,总计120例。随机分为常规护理、常规护理配合改进非语言性沟通技巧的对照组和试验组,各60例。对比对... 目的评价改进非语言性沟通技巧的运用对ICU护理工作质量以及患者满意度等方面的影响,以促进ICU患者康复。方法选择本院ICU收治的患者,总计120例。随机分为常规护理、常规护理配合改进非语言性沟通技巧的对照组和试验组,各60例。对比对照组与试验组ICU患者的护理满意度、主动配合率、情绪评分以及护理质量评分。结果试验组ICU患者的护理满意度、主动配合率、护理质量评分均明显高于对照组,情绪评分低于对照组(P<0.05)。结论给予ICU患者常规护理的同时配合改进非语言性沟通技巧可以进一步提高患者的配合度、满意度,稳定患者情绪,并整体上提升科室护理服务质量。 展开更多
关键词 改进 非语言性 沟通技巧 ICU护理工作 护理质量 满意度
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文章速递运用OKR提升虚拟团队绩效的方法研究 认领
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作者 李燕玲 《中小企业管理与科技》 2021年第1期113-115,共3页
在经济全球化程度日益加深的大环境下,随着互联网技术的迅猛发展,以虚拟团队形式进行远程协同办公的模式在全球范围内兴起和发展,新冠肺炎疫情更在一定程度上加速了这一进程。随着虚拟团队在人们日常工作中越来越普及,虚拟团队绩效的提... 在经济全球化程度日益加深的大环境下,随着互联网技术的迅猛发展,以虚拟团队形式进行远程协同办公的模式在全球范围内兴起和发展,新冠肺炎疫情更在一定程度上加速了这一进程。随着虚拟团队在人们日常工作中越来越普及,虚拟团队绩效的提升成为企业关注的重点。论文对运用OKR管理工具有效提升虚拟团队绩效的方法进行研究,以期为提高虚拟团队的绩效提供参考。 展开更多
关键词 OKR 虚拟团队 绩效 提升
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教育改进学的创建与中国探索:方法论 认领
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作者 韩笑 陈唤春 李军 《清华大学教育研究》 CSSCI 北大核心 2020年第3期34-41,65,共9页
教育科学是一门面向人的发展与社会进步的复杂学问,难以从纯粹科学的角度来界定。教育研究的学科地位,取决于它的科学性和专业性。教育研究既需要哲学上的价值判断,也需要对教育属性进行科学探寻。教育改进学的方法论以学科导向、系统... 教育科学是一门面向人的发展与社会进步的复杂学问,难以从纯粹科学的角度来界定。教育研究的学科地位,取决于它的科学性和专业性。教育研究既需要哲学上的价值判断,也需要对教育属性进行科学探寻。教育改进学的方法论以学科导向、系统思维与循证研究为基本特征,立足于教育改进的实践,建立基于跨学科的体系。本文总结了两种具有代表性的方法论模型,包括来自政策研究的多维视角模型和改进科学的“计划-试行-研究-实施”PDSA循环模型,在教育改进学的方法论建构方面有着特殊的价值,值得在教育改进实践中进行广泛的推广和应用。教育改进学作为新兴学科,其学科体系、方法论基础仍处在探索、发展、成熟的漫长过程之中,需要在教育改进实践中不断提炼、应用和改进。 展开更多
关键词 教育改进 教育改进学 方法论 改进科学 多维视角 PDSA
教育改进学的创建与中国探索:科学内涵与理论溯源 认领
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作者 秦一鸣 蔡心心 李军 《清华大学教育研究》 CSSCI 北大核心 2020年第3期15-24,共10页
由于大规模测量的局限或忽略具体文化、地域等背景因素,政府决策常常表现为低效甚至失败。为提升服务的质量、降低政策成本,美国于1970年代发起了“质量运动”,改进科学由此进入公共服务领域,并在该领域中取得了良好的效用。在形成了多... 由于大规模测量的局限或忽略具体文化、地域等背景因素,政府决策常常表现为低效甚至失败。为提升服务的质量、降低政策成本,美国于1970年代发起了“质量运动”,改进科学由此进入公共服务领域,并在该领域中取得了良好的效用。在形成了多种理论模型之后,改进科学也于21世纪初被引入教育领域,引起教育界的广泛重视,教育改进学因此得以创建。本文对改进的科学概念进行内涵厘清,辨析它与“变革”“改革”“改善”“创新”及“发展”等概念的关系,以及在中国语境下的意义。通过阐明教育改进的理论前提,本文提出教育改进学具有两个核心的科学内涵:进步指向和可持续。在此基础上,本文对当前在教育改进学的经典理论模型进行溯源式梳理和评述,批判性介绍富兰(Fullan)“精益启动模型”、库布勒-罗斯(Kubler-Ross)模型、克鲁格(Kruger)模型、科特(Kotter)模型和U模型(Theory U)。总之,科学内涵的辨析和对变革模型的理论溯源对于教育改进学在现代的构建和应用,具有不可或缺的必要价值。 展开更多
关键词 改进 教育改进 教育改进学 组织变革 理论前提 科学内涵 可改进性
A Novel Modularizing Design Method of 10 kV High Voltage Switchgear for Live Maintenance 认领
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作者 Yuan Yao Xudong Ouyang +2 位作者 Guowei Zeng Qi Tang Wenyu Ma 《能源与动力工程(英文)》 2020年第4期1-13,共13页
Due to imperfect manufacturing technology, design defects and environmental impact, the failure rate of 10 kV switchgear is very high. For this reason, based on taken present situation of traditional switchgear and th... Due to imperfect manufacturing technology, design defects and environmental impact, the failure rate of 10 kV switchgear is very high. For this reason, based on taken present situation of traditional switchgear and the current technical requirements for switchgear into account, a new reliable and safe modular high voltage switchgear design method is presented in this paper, which can reduce the failure rate of switchgear and improve the reliability of power supply. The electric field and temperature rise simulation model are established to check the reasonability and validity. By using the finite element software, the simulation results show that the design in this paper has a maximum temperature rise of 55 K for the main cabinet and a maximum temperature rise of 45 K for the deputy cabinet, which is far below the international standard of 70 K. The areas where the partial discharge is likely to occur within the switchgear are places such as the connection between bus-bar and cabinet, bus-bar joint and bus-bar corner. In order to avoid potential dangers, the discharge point must be located in time to prevent insulation fault of electrical equipment of the high voltage switchgear. The simulation results demonstrate that the design method in this paper greatly improve the reliability of switchgear and meets the demands of power system. 展开更多
关键词 SWITCHGEAR FINITE ELEMENT Temperature FIELD Electric FIELD IMPROVEMENT
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Design of Experiment (DoE): Implementation in Determining Optimum Design Parameters of Portable Workstation 认领
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作者 Nafisa Ali Anika Nadia Tanzeem Himadri Sen Gupta 《工程(英文)(1947-3931)》 2020年第1期25-32,共8页
In the modern era of manufacturing, it is important to optimize every design parameter in product development stage to reduce cost, material usage and to achieve the desired efficacy level. There are various models wh... In the modern era of manufacturing, it is important to optimize every design parameter in product development stage to reduce cost, material usage and to achieve the desired efficacy level. There are various models which serve those purposes, for instance, Design of Experiment (DoE) is used to check the parameters after adopting optimization tactics which results in reduced cost or saving operating time. In this regard, this research aims to construct a DoE model on a portable workstation to optimize its design parameters. The methodology of DOE would be a 2 level 3 factors full factorial DOE which is conducted to determine the optimal value for three design parameters (factors) which are material density, the length of the table and the length of the table stand in terms of the response which is the required time of fold ability function of the portable workstation. Based upon the evaluated interactions between the parameters, the optimized parameters are chosen for responses. Here, the resultant design parameters are at their lowest level, so the goal of time efficiency in fold ability function is achieved. This similar sort of DoE can be implemented in the furniture and other manufacturing industries who wish to optimize their material usage as well as increase efficiency and reduce cycle time. 展开更多
关键词 DESIGN of EXPERIMENT (DoE) PORTABLE WORKSTATION DESIGN Parameters Response Time Efficiency Improvement
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Water Bird Communities in Nonoperational Cigu Salt Pan Wetland of Varying Land Elevation and Water Depth on the Southwest Taiwan Coast 认领
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作者 Perng-Sheng Chen Shyh-Jeng Chyi +3 位作者 Tung-Hui Kuo Po-Ling Deng Ching-Lung Liu Yih-Tsong Ueng 《自然资源(英文)》 2020年第1期20-37,共18页
The Black-faced Spoonbill (Platalea minor) is a critically endangered species. More than 50% of these spoonbills winter regularly on the southwestern coast of Taiwan. From 2007 to 2019, the rate of increase of the Bla... The Black-faced Spoonbill (Platalea minor) is a critically endangered species. More than 50% of these spoonbills winter regularly on the southwestern coast of Taiwan. From 2007 to 2019, the rate of increase of the Black-faced Spoonbill population was only 10.5%, which is lower than the rate of 12.0% per year reported between 1991 and 2004. Black-faced Spoonbills have experienced several bottlenecks, and problems may exist in their breeding and/or in wintering habitats. Understanding the ecological environment of their habitats in Taiwan is an important issue, including the current use of water birds, the water depth of their habitats and even the aquatic plants. A total population of 93,614 birds of 88 species was recorded in a survey of the Cigu salt pan from October 2017 to October 2018. The biodiversity H' (loge) of the total birds was 2.67. Dunlin (Calidris alpina) was the most dominant species with a population of 21,053 (22.5%), followed by Kentish Plover (Charadrius alexandrinus) with a population of 20,350 (21.7%). The largest area of terrain elevation at -1.0 to -0.2 m was 685.4 ha (38.5%) and at -0.2 to -0.1 m was 320.4 ha (18.0%). Between 2017 and 2018, the similarity in water depth classification was 47.2%, reflecting climate change, a degree of water accumulation, and the wader utilization situation. A strategy for maintaining biodiversity in the Cigu salt pan wetland and conserving spoonbills is therefore proposed in this paper. 展开更多
关键词 HABITAT Improvement Movement Platalea MINOR TAIWAN
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Research progress on permeability improvement mechanisms and technologies of coalbed deep-hole cumulative blasting 认领
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作者 Deyong Guo Pengfei Lv +1 位作者 Jiechao Zhao Chao Zhang 《国际煤炭科学技术学报:英文版》 EI 2020年第2期329-336,共8页
Coalbed gas extraction is an important means of exploiting and utilizing gas resources,as well as a means of preventing coal mine disasters.In view of the low gas extraction rate from coalbeds with high gas content an... Coalbed gas extraction is an important means of exploiting and utilizing gas resources,as well as a means of preventing coal mine disasters.In view of the low gas extraction rate from coalbeds with high gas content and low permeability,a method of improving permeability through deep-hole cumulative blasting is applied to develop initial directional fractures using a jet flow.Under the action of the blasting stress wave and detonation gas wedge,the fractures extend over a large range within the coal,thereby improving coalbed permeability.This study focuses on the criteria of cumulative blasting-induced coalbed fracturing based on a literature review of the penetration effect of cumulative blasting.On this basis,we summarize the coal fracturing zone,crack extension process,and the key technologies of charging and hole sealing for cumulative blasting.In addition,the latest research progress in the optimization of field test drilling and blasting parameters for cumulative blasting is introduced.Research findings indicate that the permeability improvement mechanism of cumulative blasting could be further enhanced,and the technology and technical equipment are in urgent need of improvement.Finally,development trends in the cumulative blasting permeability improvement technique are identified. 展开更多
关键词 Cumulative blasting Fracturing mechanism Coalbed permeability improvement Permeability improvement technology Gas extraction
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Diagnostic Utility of Performing Flow Cytometry on Provider-Submitted Endoscopically Collected Gastrointestinal Samples 认领
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作者 Regina M. Plummer Amy K. Beckman +3 位作者 Meghan M. Hupp Elizabeth L. Courville Sarah A. Williams Michael A. Linden 《血液病期刊(英文)》 2020年第1期1-11,共11页
Multicolor flow cytometry (MFC) is essential to the diagnosis of non-Hodgkin lymphoma (NHL). In our institution, MFC specimens are submitted by pathologists or an ordering provider. As endoscopy has revolutionized the... Multicolor flow cytometry (MFC) is essential to the diagnosis of non-Hodgkin lymphoma (NHL). In our institution, MFC specimens are submitted by pathologists or an ordering provider. As endoscopy has revolutionized the ability to biopsy the gastrointestinal (GI) tract, our lab increasingly receives provider-submitted, endoscopically-acquired GI biopsies (PEGIB) for MFC analysis. This study evaluates the clinical utility of MFC performed on PEGIB and proposes a new testing algorithm to enhance the pathology team’s role in MFC test utilization. Fifty-five archival PEGIB MFC cases were identified and histories were reviewed. MFC was non-contributory to the overall diagnosis in 85% of PEGIB. Retroactively implementing an algorithm that used PEGIB permanent section screening to triage the 55 archival cases resulted in the appropriate identification of 100% of specimens whose diagnosis would have benefitted from MFC analysis, and the optimization of test utilization by decreasing unnecessary MFC studies. 展开更多
关键词 Flow CYTOMETRY Endoscopic BIOPSIES GI BIOPSIES Endoscopy Quality Improvement
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Hospital Admission Less than 30 Days after Chemotherapy: Results from a Chemotherapy-Specific Morbidity and Mortality Conference in Gynecologic Oncology 认领
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作者 Lauren Philp Tracilyn Hall +1 位作者 Lisa Diver Annekathryn Goodman 《癌症治疗(英文)》 2020年第6期377-387,共11页
<strong>Introduction: </strong><span><span><span style="font-family:""><span style="font-family:Verdana;">Morbidity and Mortality (M&M) rounds can ident... <strong>Introduction: </strong><span><span><span style="font-family:""><span style="font-family:Verdana;">Morbidity and Mortality (M&M) rounds can identify adverse events and improve patient safety however adoption in cancer centers is not routine. Herein we report the results of a chemotherapy-specific gynecologic oncology M&M rounds and identify reasons for hospital admission < 30 days after chemotherapy treatment. </span><b><span style="font-family:Verdana;">Methods: </span></b><span style="font-family:Verdana;">Between July 2014 and April 2016, all admissions < 30 days from chemotherapy administration were prospectively collected along with clinical data. Admissions were described and classified as planned or unplanned and as associated with chemotherapy or with underlying disease. </span><b><span style="font-family:Verdana;">Results: </span></b><span style="font-family:Verdana;">585 patients were admitted, 78% of whom had ovarian cancer and 43% of whom had recurrent disease. Overall, 47% of admissions were unplanned and these were significantly longer than planned admissions (5.6 vs. 2.4 days, p = 0.0003). Of unplanned admissions, 43% were due to chemotherapy, and 57% were due to disease burden. 74% of patients had received >1 prior line of chemotherapy, and 22% were on clinical trial. The most common causes of unplanned admission were nausea, vomiting or failure to thrive (28.9%), fever (17.9%) and small bowel obstruction (19.9%). </span><b><span style="font-family:Verdana;">Conclusions: </span></b><span style="font-family:Verdana;">There is a high rate of unplanned admission < 30 days after chemotherapy and patients with ovarian cancer and recurrent disease are at the highest risk. This information can be used to counsel patients about complications of chemotherapy and to improve supportive management. M&M conferences surrounding unplanned admissions after chemotherapy may help guide therapy, encourage best supportive care, and prompt re-evaluation of treatment goals in heavily pretreated patients with rec 展开更多
关键词 Gynecologic Oncology Quality Improvement CHEMOTHERAPY
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Interventions to Improve HIV Viral Load Suppression among the Adolescents: Evidence of Improvement Science through a Quality Improvement Approach in Eastern Uganda 认领
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作者 Bonniface Oryokot Yunus Miya +6 位作者 Barbara Logose Eunice Ajambo Abraham Ignatius Oluka Charles Odoi Bernard Michael Etukoit Levicatus Mugenyi Kenneth Mugisha 《艾滋病(英文)》 2020年第2期94-106,共13页
<b>Introduction:</b> Achieving viral load suppression among the adolescents living with HIV continues to hold back attainment of sustainable development goals. TASO Mbale realized a viral load suppression ... <b>Introduction:</b> Achieving viral load suppression among the adolescents living with HIV continues to hold back attainment of sustainable development goals. TASO Mbale realized a viral load suppression rate of 63.1% among the adolescents living with HIV in care in quarter 4 of 2016. We therefore, instituted a quality imrpovement project to improve Viral load suppression from 63.1% in quarter 4 2016 to 90% by the end of quarter 4 2017. <b>Method:</b> Baseline data from the Uganda viral load dashboard were analyzed, and fishbone diagram was utilized to provide root causes of low viral load suppression among the adolescents living with HIV at TASO Mbale. The identified barriers were Knowlegde gap, among the adolescents, on positive living, Missing clinic appointments, Sub-optimal adherence, Poorly planned adolescent HIV clinic, Inadequate follow-up and Low use of data for informed decisions. A plan-do-study-act (PDSA) model was applied to implement tested changes. Strategies that worked included introduction of appointment register to track appointment behaviour of the adolescents, generating lists of clients on appointment who were due for Viral Load bleeding, telephone calls for follow up, increasing the frequency of reviewing adolescents from once a month to twice a week, committing a dedicated team responsible for adolescent care. <b>Results:</b> The viral load suppression improved from 63.1% in quarter 4 of 2016 to 63.8% in the first quarter of 2017, to 87.5% in quarter 2 of 2017, 97.6% in the third quarter and 91.4% in quarter 4 of 2017. <b>Conclusion:</b> The use of quality improvement in addressing gaps in HIV service delivery is highly effective. 展开更多
关键词 HIV Adolescents Viral Load Suppression Quality Improvement
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文章速递Smart Boilers: Grid Support Services from Non-Critical Loads 认领
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作者 Panagis N. Vovos Konstantinos G. Georgakas 《电力能源(英文)》 2020年第12期23-45,共23页
The aim of this paper is to present the concept of a simple and cheap upgrade for electric water boilers, allowing them to provide power quality services to the distribution grid. The upgrade requires only minimum add... The aim of this paper is to present the concept of a simple and cheap upgrade for electric water boilers, allowing them to provide power quality services to the distribution grid. The upgrade requires only minimum additional hardware and it is easily installable. “Smart Boilers”, as the upgraded boilers are named, perform precise active and reactive power control, but most significantly mitigate line current harmonics. Αctive and reactive power control is implemented by appropriate regulation of the modulation sinewave amplitude and phase, respectively. This type of control is easily customizable in order to accommodate a variety of power quality targets, depending on the required level of services and available grid monitoring equipment. The method used for line current harmonic compensation is based on the injection of mirror harmonics created at the modulation stage of the converter. It is indifferent of harmonic source: it is equally successful at mitigating harmonics caused by the power electronic converter of the Smart Boiler, other sources of current harmonics or loads. The achieved grid services are clearly beyond the “on/off” operation of electric boilers, currently implemented by Demand Side Management (DSM) in order to shift load away from peak hours. It has been demonstrated through simulations, that Smart Boilers can assist voltage regulation at terminal buses, compensate reactive power and suppress harmonic currents at lines. 展开更多
关键词 Electrical Grid Improvement High Harmonics Minimization Smart Boilers Smart Power Grids Active Power Control Reactive Power Compensation
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文章速递The Importance of Both the Technical and Social Domains in Creating a Culture That Accelerates Improvement in Healthcare 认领
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作者 Lane F. Donnelly Karen Frush +2 位作者 John Shook Peter A. Schein Edgar H. Schein 《健康(英文)》 2020年第12期1575-1582,共8页
Driving improvement in healthcare can be challenging related in part related to the degree of complexity. We break down the aspects of culture needed to accelerate improvement into a technical domain and a social doma... Driving improvement in healthcare can be challenging related in part related to the degree of complexity. We break down the aspects of culture needed to accelerate improvement into a technical domain and a social domain. Task processes can be considered an organization’s technical domain. The social processes, how those doing the work interact, can be thought of as the organization’s social domain. The technical domain focuses on the work related to tasks and the social domain on the relationships that make efficient and effective work possible. We argue that work requirements and social relations are inexorably intertwined—each profoundly impacting, reflecting, and even determining the other. In this review, we argue that in order to accelerate healthcare system improvement, focus must be given to processes that take into consideration both on the social and technical domains. 展开更多
关键词 Improvement Culture Sociotechnical
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Changes in starch quality of mid-season indica rice varieties in the lower reaches of the Yangtze River in last 80 years 认领
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作者 ZHANG Hao JING Wen-jiang +7 位作者 XU Jing-ju MA Bing-ju WANG Wei-lu ZHANG Wei-yang GU Jun-fei LIU Li-jun WANG Zhi-qin YANG Jian-chang 《农业科学学报:英文版》 SCIE CAS CSCD 2020年第12期2983-2996,共14页
Rice (Oryza sativa L.) quality depends mainly on the characteristics of starch stored in kernels. Understanding the changes in starch characteristics in kernels during variety improvement would have great significance... Rice (Oryza sativa L.) quality depends mainly on the characteristics of starch stored in kernels. Understanding the changes in starch characteristics in kernels during variety improvement would have great significance to improve rice quality. This study was designed to investigate the starch characteristics in the kernels and associated physiological traits of indica rice varieties in the lower reaches of the Yangtze River in China in last 80 years. Eight representative mid-season indica rice varieties were grown in the field. The results showed that the grain yield was significantly increased with the improvement of varieties and such an increase was mainly attributed to the increase in total number of spikelets. The tall varieties applied in the 1940s–1950s had higher protein content, relative crystallinity and infrared (IR) ratio of 1 045/1 022 cm^–1. The semi-dwarf varieties applied in the 1980s–1990s had higher gel consistency, amylopectin content, IR ratio of 1 022/995 cm^–1, and breakdown value. With the improvement of varieties, the amylose content, large-sized starch granule number and volume distribution, onset and peak of gelatinization temperature, gelatinization and retrogradation enthalpy, setback value, pasting temperature, viscosity of peak, hot and final, and 1-aminocycopropane-1-carboxylic acid (ACC) concentrations in panicles and root bleeding were gradually decreased, whereas the medium-sized starch granule number and volume distribution, activities of key enzymes in grains, and zeatin (Z)+zeatin riboside (ZR) contents in panicles and root bleeding at grain filling stage were gradually increased. Correlation analysis showed that starch thermodynamic characteristics were closely related to starch structure and components, key enzymes and hormones. The results suggest that starch quality was enhanced through the optimization of starch components, structure, thermodynamics, and the regulation of key enzymes in grains and hormones in panicles and root bleedings at grain filling stage durin 展开更多
关键词 rice STARCH THERMODYNAMICS HORMONE variety improvement
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秦川牛改良效果研究和建议 认领
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作者 魏淑娟 陈帅 《中国牛业科学》 2020年第3期80-83,共4页
本文阐述了秦川肉牛改良历程和不同肉牛品种对秦川牛的改良效果,提出在保留秦川牛原有的耐粗饲、抗逆性强、肉质好等优点的基础上,改良其早熟性差、饲料报酬低、尖尻、后躯发育差、产肉率和泌乳性能低等缺陷的改良建议。
关键词 秦川牛 改良 效果 建议
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影响聚酯熔体过滤碟片清洗质量的原因及对策 认领
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作者 潘贵勇 吴清伟 《安徽化工》 CAS 2020年第5期76-80,84,共6页
更换过滤器后,过渡产品存在杂质点弊病,这些弊病是由碟片清洗不干净造成的。采用鱼骨法分析影响滤碟片清洗质量的因素,确定主要影响因素。针对主要因素制定了过滤碟片清洗的改进措施,优化清洗流程,有效改善清洗效果。
关键词 杂质点 过滤器 碟片 清洗 改进
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