检索结果-南通市图书馆

包装废弃物热解余热回收用涡旋膨胀机瞬态流动特性研究

在线全文

学校读者我要写书评

暂无评论

包装工程 2023年第15期44卷 244-251页

作者：王婧郭立强武立强田硕河北白沙烟草有限责任公司保定卷烟厂河北保定071000

目的为揭示进气压力的变化对涡旋膨胀机内部流动特征及性能参数的影响机制,探究其对膨胀机效率及实际回收功率的影响规律。方法以余热回收有机朗肯循环中的涡旋膨胀机为研究对象,利用STAR CCM+软件,采用重叠网格技术对涡旋膨胀机内部计... 详细信息

目的为揭示进气压力的变化对涡旋膨胀机内部流动特征及性能参数的影响机制,探究其对膨胀机效率及实际回收功率的影响规律。方法以余热回收有机朗肯循环中的涡旋膨胀机为研究对象,利用STAR CCM+软件,采用重叠网格技术对涡旋膨胀机内部计算流体域进行非稳态离散求解,分析涡旋膨胀机流场变化特性以及性能参数的变化规律。结果在出口压力不变的条件下,随着进气压力的上升,压力场分布梯度增大;进、出口流量均呈现周期性波动,出口流量的波动幅度明显小于入口流量的波动幅度。填充系数的大小一定程度上反映了膨胀机内部的泄漏程度或流动阻力大小,观察到进气压力为0.75 MPa时填充系数最大,此时工质的流动阻碍相对更小,平均质量流量也最大。涡旋膨胀机等熵效率、输出功率均随进气压力的增大而增大。结论涡旋膨胀机输出功率的优化与多种因素相关,要综合考虑进出口实际焓差和平均质量流量等因素的影响,只考虑单方面因素缺乏一定的合理性。

关键词：包装废弃物余热回收涡旋膨胀机流动特性数值模拟

Triterpenoids from the Mangrove Plant Sonneratia Paracaseolaris and Their Bioactivities

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Triterpenoids from the Mangrove Plant Sonneratia Paracaseola...

基于LabVIEW的水压传感器数据采集系统设计

2013年中国药学大会暨第十三届中国药师周

作者： Kai-Kai Gong Ping-lin li Xing-Wang Zhang Nai-Xia Zhang Lei Xue Wen-Juan Song Xu-li Tang guo-qiang li Key Laboratory of Marine Drugs Chinese Ministry of Education School of Medicine and Pharmacy Ocean University of China College of Chemistry and Chemical Engineering Ocean University of China

Chemical investigation of the aerial parts of mangrove plant Sonneratia Paracaseolaris yielded five new triterpenoids paracaseolins A E （1 4, and 11） together with twelve known ones （5 10, 12 17）. Their structures were established by extensive spectroscopic methods and comparison of their spectroscopic data with those of the related known compounds. The cytotoxicities against P388, HeLa, A549 and K562 tumor cell lines and anti-H1N1 （Influenza A virus） activities for the isolates were evaluated. Compound 4 showed potent cytotoxicity against A549 cell line with IC 50 value of 1.89 M. A preliminary SAR was discussed, and the 3 -coumaroyl group was suggested as an essential pharmacophore for their cytotoxicities against P388, HeLa and A549 cell lines. Besides, compound 1 exhibited significant anti-H1N1 virus activity with IC 50 value of 28.4 g/mL.

关键词： Mangrove plant Sonneratia Paracaseolaris Sonneratiaceae triterpenoids cytotoxicities anti-H1N1 activities

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

仪表技术与传感器 2016年第12期 83-86页

作者：贾晓寒郭利强郭涛中北大学仪器科学与动态测试教育部重点实验室电子测试技术重点实验室山西太原030051 淮海工业集团山西长治046000

针对外部环境对水下压力值数据采集精度的影响,设计了一种水压传感器数据采集系统。在硬件设计中,使用芯片PCF8591对信号进行模数转换;同时,使用芯片STC89C52进行数据采集处理,保证了数据采样精度和数据处理的速度。计算机显示界面程序... 详细信息

针对外部环境对水下压力值数据采集精度的影响,设计了一种水压传感器数据采集系统。在硬件设计中,使用芯片PCF8591对信号进行模数转换;同时,使用芯片STC89C52进行数据采集处理,保证了数据采样精度和数据处理的速度。计算机显示界面程序采用图形化编程软件LabVIEW编写,用户显示界面信息丰富而且美观。实验表明,该数据采集系统具有结构简单、数据采集精度高、数据读取方便、人机界面友好等特点,具有很大应用价值。

关键词：虚拟仪器水压传感器单片机模数转化串口通讯数据采集

在线全文

学校读者我要写书评

暂无评论

具有优良拮抗沙门氏菌能力的乳酸杆菌的研究

食品研究与开发 2016年第16期37卷 171-174页

作者：张卉钱国强李宾黄淮学院护理学系河南驻马店463000 黄淮学院生物工程系河南驻马店463000

沙门氏菌是常见的食源性致病菌之一,有研究报道乳酸杆菌可以有效的抑制某些致病菌,然而对于能够拮抗沙门氏菌的乳酸杆菌的报道并不常见。筛选出了一株具有优良拮抗沙门氏菌能力的乳酸杆菌,并对其抑菌物质的特性进行研究;结果表明3号植... 详细信息

沙门氏菌是常见的食源性致病菌之一,有研究报道乳酸杆菌可以有效的抑制某些致病菌,然而对于能够拮抗沙门氏菌的乳酸杆菌的报道并不常见。筛选出了一株具有优良拮抗沙门氏菌能力的乳酸杆菌,并对其抑菌物质的特性进行研究;结果表明3号植物乳杆菌(***)对沙门氏菌具有较强的抑制能力,其抑菌物质中包含了细菌素、有机酸和过氧化氢。此外,乳酸杆菌的抑菌物质也具有较强的热稳定性。

关键词：沙门氏菌乳酸杆菌拮抗抑菌物质

在线全文

学校读者我要写书评

暂无评论

大射电望远镜反射面板非线性分析

同济大学学报（自然科学版） 2004年第2期32卷 161-166页

作者：李国强沈黎元罗永峰邓长根同济大学建筑工程系上海200092

大射电望远镜反射面板为三角形薄板,且布置大量网孔.反射面板在正常工作状态下发生非线性变形,故先采用能量变分法给出简支正三角形薄板非线性变形的近似解,并以有限元分析加以修正,然后依据理论分析和参数分析考虑板中网孔的影响,最终... 详细信息

大射电望远镜反射面板为三角形薄板,且布置大量网孔.反射面板在正常工作状态下发生非线性变形,故先采用能量变分法给出简支正三角形薄板非线性变形的近似解,并以有限元分析加以修正,然后依据理论分析和参数分析考虑板中网孔的影响,最终得到反射面板非线性变形最大挠度.试验表明,上述近似方法是可靠方便的.

关键词：薄板非线性能量变分法网孔

Genome assembly of autotetraploid Actinidia arguta highlights adaptive evolution and enables dissection of important economic traits

在线全文

学校读者我要写书评

暂无评论

Plant Communications 2024年第6期5卷 173-192页

作者： Xue-Mei Lu Xiao-Fen Yu guo-qiang li Ming-Hao Qu Huan Wang Chuang liu Yu-Ping Man Xiao-Han Jiang Mu-Zi li Jian Wang Qi-Qi Chen Rui Lei Cheng-Cheng Zhao Yun-Qiu Zhou Zheng-Wang Jiang Zuo-Zhou li Shang Zheng Chang Dong Bai-lin Wang Yan-Xiang Sun Hui-Qin Zhang Jie-Wei li Quan-Hui Mo Ying Zhang Xin Lou Hai-Xu Peng Ya-Ting Yi He-Xin Wang Xiu-Jun Zhang Yi-Bo Wang Dan Wang li li Qiong Zhang Wen-Xia Wang Yongbo liu Lei Gao Jin-Hu Wu Yan-Chang Wang CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture Wuhan Botanical GardenChinese Academy of SciencesWuhanHubeiChina Key Laboratory of Western China’s Environmental Systems(Ministry of Education) College of Earth and Environmental SciencesLanzhou UniversityLanzhouGansuChina College of life Sciences University of Chinese Academy of SciencesBeijingChina Wuhan Frasergen Bioinformatics Co. LtdWuhanHubeiChina Institute of Soil and Fertilizer Anhui Academy of Agricultural SciencesHefeiChina College of Agricultural Sciences Xichang UniversityXichangSichuanChina Department of Horticulture Heilongjiang Academy of Agricultural SciencesHarbinHeilongjiangChina College of life Sciences Langfang Normal UniversityLangfangHebeiChina Institute of Horticulture Zhejiang Academy of Agricultural SciencesHangzhouZhejiangChina Guangxi Institute of Botany Chinese Academy of SciencesGuilinGuangxiChina Xi’an Botanical Garden of Shaanxi Province Institute of Botany of Shaanxi ProvinceXi’anShaanxiChina Institute of Modern Agricultural Research Dalian UniversityDalianLiaoningChina Bioinformatics Center College of Plant Science and TechnologyBeijing University of AgricultureBeijingChina College of Agriculture Eastern Liaoning UniversityDandongLiaoningChina Dalian Institute of Chemical Physics Chinese Academy of SciencesDalianLiaoningChina State Environmental Protection Key Laboratory of Regional Eco-process and Function Assessment Chinese Research Academy of Environmental SciencesBeijingChina Hubei Hongshan Laboratory WuhanHubeiChina The New Zealand Institute for Plant and Food Research limited AucklandNew Zealand

Actinidia arguta,the most widely distributed Actinidia species and the second cultivated species in the genus,can be distinguished from the currently cultivated Actinidia chinensis on the basis of its small and smooth fruit,rapid softening,and excellent cold *** evolution of tetraploid Actinidia species and the genetic basis of their important agronomic traits are still ***,we generated a chromosome-scale genome assembly of an autotetraploid male *** *** genome assembly was 2.77 Gb in length with a contig N50 of 9.97 Mb and was anchored onto 116 *** and clustering of 101 geographically representative accessions showed that they could be divided into two geographic groups,Southern and Northern,which first diverged 12.9 million years *** underwent two prominent expansions and one demographic bottleneck from the midPleistocene climate transition to the late *** genomics studies using paleoclimate data enabled us to discern the evolution of the species’adaptation to different historical *** genes(AaCEL1,AaPME1,and AaDOF1)related to flesh softening were identified by multi-omics analysis,and their ability to accelerate flesh softening was verified through transient expression assays.A set of genes that characteristically regulate sexual dimorphism located on the sex chromosome(Chr3)or autosomal chromosomes showed biased expression during stamen or carpel *** chromosome-level assembly of the autotetraploid *** genome and the genes related to important agronomic traits will facilitate future functional genomics research and improvement of ***.

关键词： kiwiberry dioecism adaptive evolution paleoclimate GEA rapid softening

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

一种相位测试用曲口面天线的设计与应用

微波学报 2020年第6期36卷 76-79,99页

作者：王克先郭利强中国航空工业集团公司济南特种结构研究所高性能电磁窗航空科技重点实验室济南250023 中国电子科技集团公司第四十一研究所青岛266555

相位测试技术可满足不同外形天线罩的在线测试需求。通过数值仿真,设计最佳变换曲线完成矩形传输波导与圆形辐射天线的拟合连接,能够有效降低天线驻波比,实现测试探头的高增益收发,提升测试有效性。在维持驻波比参数前提下,对天线口面... 详细信息

相位测试技术可满足不同外形天线罩的在线测试需求。通过数值仿真,设计最佳变换曲线完成矩形传输波导与圆形辐射天线的拟合连接,能够有效降低天线驻波比,实现测试探头的高增益收发,提升测试有效性。在维持驻波比参数前提下,对天线口面弧线给予二次曲率调整,可以适应不同外形天线罩的测试稳定性要求。根据仿真结果加工的低驻波比反射相位测试天线,已应用于多个型号天线罩成型中的相位在线测试,提高了监控的有效性,验证了设计仿真结果的正确性。

关键词：插入相位变化电厚度驻波比反射相位天线

在线全文

学校读者我要写书评

暂无评论

VC二步发酵伴生菌苏云金芽孢杆菌的选育

河北大学学报（自然科学版） 2006年第1期26卷 108-111页

作者：郭礼强郭立格卢育新张利平河北大学生命科学学院河北保定071002

苏云金芽孢杆菌经紫外线（UV）、亚硝基胍（NTG）及两者的复合诱变，获得1株高效伴生菌株UN-366．在pH6．5～6．8的发酵培养基中与氧化葡萄糖酸杆菌混合发酵，UN-366的平均糖酸转化率提高了6．32％，古龙酸的质量浓度达到了83．7g／L，... 详细信息

苏云金芽孢杆菌经紫外线（UV）、亚硝基胍（NTG）及两者的复合诱变，获得1株高效伴生菌株UN-366．在pH6．5～6．8的发酵培养基中与氧化葡萄糖酸杆菌混合发酵，UN-366的平均糖酸转化率提高了6．32％，古龙酸的质量浓度达到了83．7g／L，经连续5代转接发酵实验，性状稳定．

关键词： Vc二步发酵选育苏云金芽孢杆菌复合诱变

A descriptive analysis of injury triage, surge of medical demand, and resource use in an university hospital after 8.12 Tianjin Port Explosion, China

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Traumatology 2015年第6期18卷 314-319页

作者： guo-qiang li Shi-Ke Hou Xin Yu Xiang-Tao Meng liang-liang liu Peng-BoYan Meng-Na Tian Shao-Lei Chen Hui-Juan Han Institute of Disaster and Emergency Rescue Medicine Pingjin Hospital Logistics College of The Chinese People's Armed Police Forces Tianjin 300162 China Department of Intensive Care Medicine Pingjin Hospital Logistics College of The Chinese People's Armed Police Forces Tianjin 300162 China contributed equally to this article as the co-firstauthor.

Objective： The 8.12 Tianjin Port Explosion in 2015 caused heavy casualties. Pingjin Hospital, an affiliated college hospital in Tianjin, China participated in the rescue activities. This study aims to analyze the emergency medical response to this event and share experience with trauma physicians to optimize the use of medical resource and reduce mortality of critical patients. Methods： As a trauma centre at the accident city, our hospital treated 298 patients. We retrospectively analyzed the data of emergency medical response, including injury triage, injury type, ICU patient flow, and medical resource use. Results： There were totally 165 deaths, 8 missing, and 797 non-fatal injuries in this explosion. Our hospital treated 298 casualties in two surges of medical demand. The first one appeared at 1 h after explosion when 147 wounded were received and the second one at 4 h when 31 seriously injured pa- tients were received, among whom 29 were transferred from Tianjin Emergency Center which was responsible for the scene injury triage. After reexamination and triage, only 11 cases were defined as critical ill patients, The over-triage rate reached as high as 62.07%. Seventeen patients underwent surgery and 17 patients were admitted to the intensive care unit, Conclusions： The present pre-hospital system is incomplete and may induce two surges of medical de- mand. The first one has a much larger number of casualties than predicted but the injury level is mild; while the second one has less wounded but almost all of them are critical patients. The over-triage rate is high. The hospital emergency response can be improved by an effective re-triage and implementation of a hosoital-wide damage control.

关键词： Mass casualty incident Over-triage Surge of medical demand Damage control