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Transcriptome-Wide Identification and Functional Analysis of PgSQE08-01 Gene in Ginsenoside Biosynthesis in Panax ginseng C.A.Mey.
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作者 Lei Zhu Lihe Hou +5 位作者 Yu Zhang Yang Jiang Yi Wang Meiping Zhang Mingzhu Zhao Kangyu Wang 《Phyton-International Journal of Experimental Botany》 SCIE 2024年第2期313-327,共15页
Panax ginseng C.A.Mey.is an important plant species used in traditional Chinese medicine,whose primary active ingredient is a ginsenoside.Ginsenoside biosynthesis is not only regulated by transcription factors but als... Panax ginseng C.A.Mey.is an important plant species used in traditional Chinese medicine,whose primary active ingredient is a ginsenoside.Ginsenoside biosynthesis is not only regulated by transcription factors but also controlled by a variety of structural genes.Nonetheless,the molecular mechanism underlying ginsenoside biosynthesis has always been a topic in the discussion of ginseng secondary metabolites.Squalene epoxidase(SQE)is a key enzyme in the mevalonic acid pathway,which affects the biosynthesis of secondary metabolites such as terpenoid.Using ginseng transcriptome,expression,and ginsenoside content databases,this study employed bioinformatic methods to systematically analyze the genes encoding SQE in ginseng.We first selected six PgSQE candidates that were closely involved in ginsenoside biosynthesis and then identified PgSQE08-01 to be highly associated with ginsenoside biosynthesis.Next,we constructed the overexpression vector pCAMBIA3301-PgSQE08-01 and the RNAi vector pART27-PgSQE08-01 and transformed ginseng adventitious roots using Agrobacterium rhizogenes,to obtain positive hairy-root clones.Thereafter,quantitative reverse transcriptionpolymerase chain reaction and high-performance liquid chromatography were used to determine the expression of relevant genes and ginsenoside content,respectively.Then,we focused on the function of PgSQE08-01 gene,which was noted to be involved in ginsenoside biosynthesis.Thus,these findings not only provided a molecular basis for the identification of important functional genes in ginseng but also enriched genetic resources for the biosynthesis of ginsenosides using synthetic biology. 展开更多
关键词 Panax ginseng pgSQE08-01 gene squalene epoxidase GINSENOSIDE ginseng hairy roots
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史密斯模型视角下乡村产业振兴政策执行研究--以F县H镇为例 被引量:1
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作者 陈雨露 李亚 郝邹琴 《智慧农业导刊》 2024年第4期69-73,共5页
乡村振兴是包括产业振兴、人才振兴、文化振兴、生态振兴和组织振兴的全面振兴,其中最重要、最根本、最关键的是产业振兴。乡村产业振兴与乡村发展的物质经济基础密切相关,是乡村全面振兴的关键。促进乡村产业振兴,必须建立健全制度体系... 乡村振兴是包括产业振兴、人才振兴、文化振兴、生态振兴和组织振兴的全面振兴,其中最重要、最根本、最关键的是产业振兴。乡村产业振兴与乡村发展的物质经济基础密切相关,是乡村全面振兴的关键。促进乡村产业振兴,必须建立健全制度体系,并有效推进政策自上而下的传导,这是实现农村一二三产业融合及乡村振兴的重要保障,对于建设中国特色社会主义乡村具有至关重要的意义。基于对F县H镇乡村产业振兴政策执行过程的实地调研,结合史密斯政策执行过程模型,从多角度分析乡村产业振兴政策执行困境并提出相关的对策建议,以期为基层政府更有效地落实产业振兴政策,推进乡村振兴提供一定的启示和参考。 展开更多
关键词 乡村产业振兴 产业政策 政策执行 史密斯模型 基层政府
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Preliminary Study on Water Demand Law of 1-0 Rooted Cuttings of Populus szechuanica
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作者 Dabuqiong Haoyu WANG +2 位作者 Huanhuan XIE Zhen XING Yanhui YE 《Meteorological and Environmental Research》 CAS 2021年第4期39-42,共4页
In order to provide theoretical basis and technical support for the afforestation and artificial water supply of P.szechuanica in arid areas,the characteristics of water consumption of P.szechuanica were explored,and ... In order to provide theoretical basis and technical support for the afforestation and artificial water supply of P.szechuanica in arid areas,the characteristics of water consumption of P.szechuanica were explored,and the law of water demand of P.szechuanica was grasped.In this paper,potted seedlings of 1-0 rooted cuttings of P.szechuanica were taken as research objects,and change situation of water consumption under different water control gradients was measured regularly by using weighing method,further analyzing dynamic change of water consumption of P.szechuanica and revealing water demand law of 1-0 rooted cuttings of P.szechuanica.The results showed that total change of water consumption of 1-0 rooted cuttings of P.szechuanica had"slow-fast-slow-fast"double-peak trend in the growth period of the current year,and corresponded with univariate linear relation(R^(2)=0.7137),with significant difference.In whole growth period,water consumption in August was the highest,which was 2.7 times of that in June and July and 1.5 times of that after September.In different water control treatments,the dynamic changes of daily and monthly water consumption were significantly different.In seven water control treatments,monthly water consumption was between(6315.95±1690.70)and(10105.28±3065.30)g/month,and mean was(8211.07±2308.23)g/month.With intensification of water control treatment,water consumption increased,but there was no seedling death due to water shortage.P.szechuanica has great plasticity in water demand,and can survive in both arid and humid environments.Meanwhile,it is revealed that P.szechuanica is the most widely distributed tree species in the region. 展开更多
关键词 Populus szechuanica 1-0 rooted cuttings Water consumption Water demand law
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Abnormal Secondary Growth and Histochemical Localization of Alkaloids in Root System of Aconitum flavum Hand.-Mazz.
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作者 祁建钊 郭继元 徐青 《Agricultural Science & Technology》 CAS 2011年第9期1313-1317,共5页
[Objective] The purpose of this study was to clarify the structure,growth pattern and histochemical localization of alkaloids in root system of Aconitum flavum Hand.-Mazz.[Method] Paraffin sectioning and histochemistr... [Objective] The purpose of this study was to clarify the structure,growth pattern and histochemical localization of alkaloids in root system of Aconitum flavum Hand.-Mazz.[Method] Paraffin sectioning and histochemistry were employed for performing the analysis in this study.[Result] The root system of Aconitum flavum Hand.-Mazz.consists of taproot,lateral root and adventitious root.The primary structure of root system is normal,but secondary structure shows abnormal.The cambium and the extra cambium of taproot form a "U"-shaped secondary vascular bundle and tertiary bundle in abnormal secondary structure.The sieve tube group is made of little sieve tube group which is differentiated from primary phloem and cambium.Meanwhile,the secondary xylem in tuberous root also appears to be a "U" shape.Parenchyma cells of secondary phloem occupy most of the tuberous root.The sieve tube group of tuberous root is mainly differentiated from parenchyma cell of secondary phloem.[Conclusion] The difference in abnormal secondary structure of taproot and tuberous root are attributed to their varied cambium compose and activity pattern.Alkaloids are mainly accumulated in parenchyma cell of the inside cortex and between bundle in taproot,while parenchyma of secondary phloem and pith in tuberous root. 展开更多
关键词 Aconitum flavum Hand. - Mazz. root system Abnormal secondary growth ALKALOIDS Histochemical localization
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Challenges and Requirements for the Application of Industry 4.0:A Special Insight with the Usage of Cyber-Physical System 被引量:5
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作者 Egon Mueller Xiao-Li Chen Ralph Riedel 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2017年第5期1050-1057,共8页
Considered as a top priority of industrial devel- opment, Industry 4.0 (or Industrie 4.0 as the German ver- sion) has being highlighted as the pursuit of both academy and practice in companies. In this paper, based ... Considered as a top priority of industrial devel- opment, Industry 4.0 (or Industrie 4.0 as the German ver- sion) has being highlighted as the pursuit of both academy and practice in companies. In this paper, based on the review of state of art and also the state of practice in dif- ferent countries, shortcomings have been revealed as the lacking of applicable framework for the implementation of Industrie 4.0. Therefore, in order to shed some light on the knowledge of the details, a reference architecture is developed, where four perspectives namely manufacturing process, devices, software and engineering have been highlighted. Moreover, with a view on the importance of Cyber-Physical systems, the structure of Cyber-Physical System are established for the in-depth analysis. Further cases with the usage of Cyber-Physical System are also arranged, which attempts to provide some implications to match the theoretical findings together with the experience of companies. In general, results of this paper could be useful for the extending on the theoretical understanding of Industrie 4.0. Additionally, applied framework and proto- types based on the usage of Cyber-Physical Systems are also potential to help companies to design the layout of sensor nets, to achieve coordination and controlling of smart machines, to realize synchronous production with systematic structure, and to extend the usage of information and communication technologies to the maintenance scheduling. 展开更多
关键词 Industrie 4.0 - Internet of Things Cyber-Physical System Smart factory Reference architectureIntelligent sensor nets Robot control Synchronousproduction
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Estrogen affects neuropathic pain through upregulating N-methyl-D-aspartate acid receptor 1 expression in the dorsal root ganglion of rats 被引量:8
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作者 Chao Deng Ya-juan Gu +1 位作者 Hong Zhang Jun Zhang 《Neural Regeneration Research》 SCIE CAS CSCD 2017年第3期464-469,共6页
Estrogen affects the generation and transmission of neuropathic pain,but the specific regulatory mechanism is still unclear.Activation of the N-methyl-D-aspartate acid receptor 1(NMDAR1) plays an important role in t... Estrogen affects the generation and transmission of neuropathic pain,but the specific regulatory mechanism is still unclear.Activation of the N-methyl-D-aspartate acid receptor 1(NMDAR1) plays an important role in the production and maintenance of hyperalgesia and allodynia.The present study was conducted to determine whether a relationship exists between estrogen and NMDAR1 in peripheral nerve pain.A chronic sciatic nerve constriction injury model of chronic neuropathic pain was established in rats.These rats were then subcutaneously injected with 17β-estradiol,the NMDAR1 antagonist D(-)-2-amino-5-phosphonopentanoic acid(AP-5),or both once daily for 15 days.Compared with injured drug na?ve rats,rats with chronic sciatic nerve injury that were administered estradiol showed a lower paw withdrawal mechanical threshold and a shorter paw withdrawal thermal latency,indicating increased sensitivity to mechanical and thermal pain.Estrogen administration was also associated with increased expression of NMDAR1 immunoreactivity(as assessed by immunohistochemistry) and protein(as determined by western blot assay) in spinal dorsal root ganglia.This 17β-estradiol-induced increase in NMDAR1 expression was blocked by co-administration with AP-5,whereas AP-5 alone did not affect NMDAR1 expression.These results suggest that 17β-estradiol administration significantly reduced mechanical and thermal pain thresholds in rats with chronic constriction of the sciatic nerve,and that the mechanism for this increased sensitivity may be related to the upregulation of NMDAR1 expression in dorsal root ganglia. 展开更多
关键词 nerve regeneration peripheral nerve injury ESTROGEN 17Β-ESTRADIOL N-rnethyl-D-aspartic acid receptor 1 pain sciatic nerve chronic constriction injury neuropathic pain D(--2-amino-5-phosphonopentanoic acid dorsal root ganglion spinal cord IMMUNOREACTIVITY western blot assay neural regeneration
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Buyer-seller Relationships in Hong Kong's Clothing Industry
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作者 陈珊珊 廖泳新 《Journal of China Textile University(English Edition)》 EI CAS 1999年第4期34-37,共4页
The aim of this study is to examine the buyer-seller re-lationship in Hong Kong’s clothing industry.The initialpart investigated the industry’s environment.Four hy-pothesis were developed which were based on the lon... The aim of this study is to examine the buyer-seller re-lationship in Hong Kong’s clothing industry.The initialpart investigated the industry’s environment.Four hy-pothesis were developed which were based on the long-term buyer-seller relationships’features.The benefitsthat can enjoy within the stage of long-term buyer-seller relationships was the defined and suggested. 展开更多
关键词 CLOTHING industry BUYER - seller RELATIONSHIP
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Can Industrial By-products Be Used as Tools in Sustainable Agriculture?
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作者 B. Toth L. Levai Sz. Veres 《Journal of Environmental Science and Engineering》 2011年第12期1596-1603,共8页
The goal of our study is to present results about the effects of selected industrial wastes-sewage sludge, lime sludge, compost-on the physiological parameters of plants. Maize seedlings (Zea mays L cvs. Norma SC) w... The goal of our study is to present results about the effects of selected industrial wastes-sewage sludge, lime sludge, compost-on the physiological parameters of plants. Maize seedlings (Zea mays L cvs. Norma SC) were used in soil plant (rhizobox) and nutrient solution plant system. The filtrates of the examined materials were used in the nutrient solution and the raw materials in the soil. Dry matter accumulation of shoots and roots, relative chlorophyll contents and the contents of some elements were measured in the plants grown on the nutrient solution. The examined materials contain some useful elements for plants e.g. Cu, Fe, K, and Mg and plenty of toxic metals e.g. AI, Cr. Root growth in the rhizoboxes was monitored, as well as that of roots in the experiment using soil. This type of growth was more intensive with the use of lime sludge than with of sewage sludge. On the other hand, the results were better at the sewage sludge than the lime sludge on the nutrient solution. 展开更多
关键词 CHLOROPHYLL industrial wastes plants growth root.
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The 4th International Exhibition on Refractories, Industrial Ceramics and Furnaces(RCF Expo'2003)Beijing, China, April 15-17, 2003In conjunction with China Refractories Seminar' 2003-Technology and Markets
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《China's Refractories》 CAS 2003年第1期44-44,共1页
Organizers and Sponsors: China Association of Refractories Industry The Chinese Society for Metals The Chinese Ceramic Society
关键词 2003 Industrial Ceramics and Furnaces conjunction with China Refractories Seminar Technology and Markets The 4th International Exhibition on Refractories April 15-17 China on with
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Plans for the Development and Revision of Industry Standards on Inspection and Quarantine from 2005-2007
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《China Standardization》 2005年第6期8-11,共4页
The inspection and quarantine standard is one of important basics to executeinspection and quarantine by laws. In recent years, with the development of economy and trade inChina, standardization has played an importan... The inspection and quarantine standard is one of important basics to executeinspection and quarantine by laws. In recent years, with the development of economy and trade inChina, standardization has played an important role in inspection and quarantine. During 2002-2004,department of Standards of Inspection and Quarantine, Certification and Accreditation Administrationof China has organized the research of the standards of inspection and quarantine, and has builtstandard sub- systems of nine fields in inspection and quarantine. 展开更多
关键词 In Plans for the Development and Revision of industry Standards on Inspection and Quarantine from 2005-2007
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Review on Development of Chinese Power Industry in 2002-2006
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作者 Department of Research, State Electricity Regulatory Commission Jia Yulu 《Electricity》 2008年第1期13-32,共20页
The 16th National Congress of the Communist Party of China was held inNovember 2002. In the five years since then, great changes took place in Chinesepower industry. Power institutional reform was deepened; the constr... The 16th National Congress of the Communist Party of China was held inNovember 2002. In the five years since then, great changes took place in Chinesepower industry. Power institutional reform was deepened; the construction ofboth power sources and power grids was speeded up; the tense situation of powersupply and demand was alleviated; the safety and reliability of power productionwere improved; the management on power tariff was standardized; environmentalprotection and energy conservation achieved good results; researches on newtechnologies made new achievements; and the operation of enterprises was im-proved. 展开更多
关键词 Review on Development of Chinese Power industry in 2002-2006
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Review and Prospect——Textile Industry 2009-2010
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作者 Nie Ting 《China Textile》 2010年第2期34-37,共4页
Although in 2010 textile industry still faces a series of uncertain factors, and export growth is difficult to recover in a short time, the domestic market will continue to play a significant role in the industry, str... Although in 2010 textile industry still faces a series of uncertain factors, and export growth is difficult to recover in a short time, the domestic market will continue to play a significant role in the industry, structure adjustment and industrial upgrading will be carried out further in the nation. In the condition of the gradually stable international market environment, rebound can be seen in Chinese textile industry. 展开更多
关键词 Textile industry 2009-2010 Review and Prospect
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辽宁省黄瓜工厂化育苗产业现状及发展关键分析
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作者 赵越 宋铁峰 +2 位作者 赵聚勇 杨光 刘永丽 《园艺与种苗》 CAS 2024年第8期40-41,59,共3页
黄瓜在辽宁省蔬菜种植面积占比大,开展黄瓜工厂化育苗研究对于提高农业生产效率、保障农产品质量安全、促进辽宁农业可持续发展具有重要意义。该文阐述了辽宁省蔬菜工厂化育苗产业的现状,分析了黄瓜工厂化育苗发展中存在的问题,并提出... 黄瓜在辽宁省蔬菜种植面积占比大,开展黄瓜工厂化育苗研究对于提高农业生产效率、保障农产品质量安全、促进辽宁农业可持续发展具有重要意义。该文阐述了辽宁省蔬菜工厂化育苗产业的现状,分析了黄瓜工厂化育苗发展中存在的问题,并提出了相应的发展建议和对策,以期为辽宁省黄瓜工厂化育苗发展的科学规划提供参考。 展开更多
关键词 黄瓜 设施蔬菜 工厂化育苗 双断根嫁接技术 产业现状
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面向扎根服务榆林的智能化人才三个联合培养模式研究与实践
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作者 冯治东 郭红波 +2 位作者 李海雄 吴敏宁 李瑞华 《榆林学院学报》 2024年第5期125-128,共4页
目前榆林信息产业人才保障不足、本地高质量技术服务较差,智能化人才团队建设缓慢等问题突出,针对扎根服务榆林的智能化人才培养需求,提出“教学科研联合、师生联合、校企联合”的三个联合人才培养新模式,即“一中心、一引领、一面向、... 目前榆林信息产业人才保障不足、本地高质量技术服务较差,智能化人才团队建设缓慢等问题突出,针对扎根服务榆林的智能化人才培养需求,提出“教学科研联合、师生联合、校企联合”的三个联合人才培养新模式,即“一中心、一引领、一面向、两抓手、三联合”模式:以高质量人才培养为中心,在党建引领下,面向扎根服务榆林,紧抓立德树人,紧抓专业建设,联合师生、联合校企、联合科教,专心培养扎根服务榆林本地的智能化人才。该模式以资源共享、优势互补、联动发展、共同进步的方式协同推进人才培养和科技创新的发展,对于提高教育质量、推动地方经济发展和社会进步具有重要意义。 展开更多
关键词 产教融合 智能化人才 联动发展 三个联合
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中国莲藕产业发展现状与对策建议
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作者 吴曼 刘堃 王哲 《蔬菜》 2024年第10期10-16,共7页
2018年以来莲藕价格波动对农户收益产生巨大影响,产业转型升级面临瓶颈,急需对我国莲藕产业现状进行系统梳理。为了解莲藕产业发展的基本情况,本文基于国家特色蔬菜产业技术体系调研数据,对我国近6年莲藕产业发展现状进行分析。研究发现... 2018年以来莲藕价格波动对农户收益产生巨大影响,产业转型升级面临瓶颈,急需对我国莲藕产业现状进行系统梳理。为了解莲藕产业发展的基本情况,本文基于国家特色蔬菜产业技术体系调研数据,对我国近6年莲藕产业发展现状进行分析。研究发现:近年来莲藕种植面积处于下降态势;莲藕种植区域主要分布于华中、华南、西南和华北地区,其中湖北省种植面积及产量均保持稳定且居全国第1;主栽品种均为我国自主选育品种;莲藕生产成本呈波动上升趋势,收益呈先上升后下降的趋势,且不同省份及经营主体的生产收益差距明显;土地产出率下降、投入产出率提高。针对目前莲藕产业存在的品种退化,连作障碍问题日益突出;机械化水平严重滞后,难以实现机械对人工的替代;产业风险加剧,急需提升基础设施水平;比较收益下降、生产者收入不稳定;产业融合深度不够,产业链增值有限等问题,提出了加强莲藕种质资源收集、鉴定与挖掘利用,加强莲藕专用机械研发以进一步推动农机—农艺相结合的栽培新模式,建立全产业链标准规范以驱动莲藕产业绿色高质量发展等对策建议,以期进一步促进莲藕产业的高质量发展。 展开更多
关键词 莲藕 产业 现状 对策建议 生产效益 品种 机械化 区域
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文学旅游产业融合发展该何去何从——基于定性比较分析法的组态路径分析
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作者 赵立莹 陈帆 《西安电子科技大学学报(社会科学版)》 2024年第1期26-37,共12页
文学旅游作为旅游发展的重要类型之一,是促进中华优秀文化发展与文化旅游产业发展的重要实践方向,能使文化更有活力,旅游更有底蕴。文章采用扎根理论与模糊定性比较分析的研究方法,以陕西省西安市白鹿原影视城为案例地,分析文学旅游产... 文学旅游作为旅游发展的重要类型之一,是促进中华优秀文化发展与文化旅游产业发展的重要实践方向,能使文化更有活力,旅游更有底蕴。文章采用扎根理论与模糊定性比较分析的研究方法,以陕西省西安市白鹿原影视城为案例地,分析文学旅游产业融合发展的影响因素,探索文学旅游产业融合发展组态路径。研究发现:1.文学旅游产业融合的发展并不是由单一因素所能决定的,是在旅游内容、旅游设施、旅游感知、人文因素、文学作品及延伸、文化展示与体验6个影响因素的综合作用下形成的。2.实现文学旅游产业融合发展的基本路径有三条,特殊路径有五条,都具有一定的发展适用性。研究结论揭示了文学旅游产业融合发展的关键因素与发展路径,具有一定的现实意义与理论价值。 展开更多
关键词 文学旅游产业融合 扎根理论 模糊定性分析比较法 组态路径
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Effects of Nitrate on the Growth of Lateral Root and Nitrogen Absorption in Rice 被引量:14
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作者 王小兵 吴平 +1 位作者 胡彬 陈青爽 《Acta Botanica Sinica》 CSCD 2002年第6期678-683,共6页
Lateral root is primary organ for plant to explore and utilize soil nutrient efficiently. The development of lateral roots (LR) is controlled by both genetic factors and nutrient status in environment. To investigate ... Lateral root is primary organ for plant to explore and utilize soil nutrient efficiently. The development of lateral roots (LR) is controlled by both genetic factors and nutrient status in environment. To investigate the effects of nitrate (NO3-) on rice lateral root growth and nitrogen (N) uptake efficiency under upland condition, three treatments, including root-split culture and whole plant culture in N sufficient and deficient conditions, were used in a vermiculite culture experiment. Root-split treatment showed that the growth of lateral roots was stimulated by localized nitrate supply. However, in whole plant culture, elongation of lateral roots was induced by NO3- deficiency. The effects of NO3- on rice lateral root growth were genotype-dependent. Similar N concentration, soluble sugar concentration and N content in shoot were observed in both root-split treatment and whole plant culture under NO3- sufficient condition, suggesting that the nitrogen requirement for rice normal growth could be satisfied with only half of roots supplied with NO3-. In the root-split treatment, N uptake was positively correlated with the average of lateral root length (ALRL) in NO3--supplied side, suggesting that the ALRL is important for rice root N uptake in the environment where the nitrogen nutrient is limiting factor. No significant correlation was observed between N uptake and ALRL in whole plant culture under N sufficient condition, which implies that the length of lateral roots may not be the main factor to determine tire rice root N uptake in nutrient-rich zone. Morphological and metabolic evidence in this study provided some prospects for genetic improvement of root system characters to improve the efficiency of nutrient absorption in rice. 展开更多
关键词 NO3- lateral root growth nitrogen absorption root-split treatment RICE
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广西壮族自治区农产品区域公用品牌形象设计研究——以覃塘莲藕为例
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作者 聂雯欣 王华琳 《工业设计》 2024年第1期52-55,共4页
广西作为农业大省区,拥有培育知名农产品区域公用品牌的优良基础。因此,文章提出以广西贵港覃塘区的覃塘莲藕为例,探究广西壮族自治区农产品区域公用品牌形象设计相关内容。首先通过SOWT态势分析法研究广西贵港覃塘区的覃塘莲藕品牌的... 广西作为农业大省区,拥有培育知名农产品区域公用品牌的优良基础。因此,文章提出以广西贵港覃塘区的覃塘莲藕为例,探究广西壮族自治区农产品区域公用品牌形象设计相关内容。首先通过SOWT态势分析法研究广西贵港覃塘区的覃塘莲藕品牌的内外部影响因素,其次通过明确品牌定位与用户画像、确定品牌风格与品牌标语、品牌视觉设计三个方面构建了覃塘莲藕品牌形象设计思路。通过文章的研究,以期为广西壮族自治区农产品区域公用品牌发展提供一些启示,同时促进农村经济的繁荣与可持续发展,为乡村振兴注入新活力。 展开更多
关键词 工业设计 广西壮族自治区 贵港覃塘莲藕 农产品 区域公用品牌形象设计
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关于耐根穿刺防水涂料行业标准编制方向的思考
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作者 余奕帆 高敏杰 朱斌 《中国建筑防水》 2024年第1期42-45,50,共5页
从种植屋面用耐根穿刺防水材料应用场景需求出发,分析了适合用于耐根穿刺防水层的涂料种类,初步提出了耐根穿刺防水涂料应具有的基本性能、应用性能和环保性能,给出了耐根穿刺防水涂料种植试验的方法,对行业标准《种植屋面用耐根穿刺防... 从种植屋面用耐根穿刺防水材料应用场景需求出发,分析了适合用于耐根穿刺防水层的涂料种类,初步提出了耐根穿刺防水涂料应具有的基本性能、应用性能和环保性能,给出了耐根穿刺防水涂料种植试验的方法,对行业标准《种植屋面用耐根穿刺防水涂料》目前的编制思路和方向进行了阐明。 展开更多
关键词 耐根穿刺防水涂料 性能要求 种植试验 行业标准
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反动式工业汽轮机超高转速大流量低压级组优化
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作者 张军辉 邹朋津 +2 位作者 刘象拯 丁旭东 高骥 《汽轮机技术》 北大核心 2024年第3期171-174,178,共5页
杭汽轮引进的西门子反动式工业汽轮机低压扭叶级组在转速和热力性能方面已经无法满足现有市场的需求。针对上述问题,采用优化算法对该系列叶型进行优化,同时,引入了斜T型叶根和枞树型叶根,改进了T型末叶根骑缝螺杆锁紧结构,提高了叶片... 杭汽轮引进的西门子反动式工业汽轮机低压扭叶级组在转速和热力性能方面已经无法满足现有市场的需求。针对上述问题,采用优化算法对该系列叶型进行优化,同时,引入了斜T型叶根和枞树型叶根,改进了T型末叶根骑缝螺杆锁紧结构,提高了叶片和转子的材料等级,此外,还通过分析已运行的同类型低压级组的运行数据,推算出优化后级组的最大许用质量流量。综上,优化后的级组子午面尺寸未发生改变,总总效率较优化前最高提高了2.5%,最高连续转速提高了20%,且通流能力保持不变。 展开更多
关键词 超高转速 斜T叶根 骑缝螺杆结构 大流量 低压级组 工业汽轮机
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