期刊文献+
共找到14,628篇文章
< 1 2 250 >
每页显示 20 50 100
A Study on the Translation Strategies of Metaphors in Song Ci from the Perspective of Conceptual Metaphor
1
作者 HUANG Shi-yue GAO Wen-cheng 《Journal of Literature and Art Studies》 2024年第11期1008-1015,共8页
This article employs the theory of conceptual metaphor to conduct a thorough analysis and exploration of translation strategies for the metaphors in Song Ci. Ci, a treasure in ancient Chinese literature, makes frequen... This article employs the theory of conceptual metaphor to conduct a thorough analysis and exploration of translation strategies for the metaphors in Song Ci. Ci, a treasure in ancient Chinese literature, makes frequent use of metaphor. Its unique form of expression and abundant artistic effects often create difficulties in translation. This study selects some representative metaphor examples from Song Ci to explore the patterns and strategies in the translation process. The study reveals that in face of the metaphors in Song Ci, translators need to comprehensively apply strategies such as retaining the metaphor, replacing the metaphor, and translating the literal meaning to ensure the quality of translation while restoring the aesthetic charm of the original metaphor. 展开更多
关键词 conceptual metaphor Song ci metaphor translation strategies
下载PDF
Gu Jiegang’s “Discussion of Ancient History” Movement and It Relationship with Developments in Western Sinology
2
作者 Li Changyin Ge Hongquan(译) 《Contemporary Social Sciences》 2019年第1期134-155,共22页
The scholarship in modern China is closely related to Western sinology in terms of school ties.Gu Jiegang’s launching of the"Discussion of Ancient History"movement centered on the"theory of the accumul... The scholarship in modern China is closely related to Western sinology in terms of school ties.Gu Jiegang’s launching of the"Discussion of Ancient History"movement centered on the"theory of the accumulated creation of Chinese ancient history"was a representative example.At the beginning of the movement Hu Shi and Gu Jiegang proposed the notion that,"there was no history before the Eastern Zhou Dynasty"which was indebted to the historical skepticism by Philip Van Ness Myers(American scholar)and Friedrich Hirth(German sinologist)of the same period.The idea that"the Shang Dynasty is still in the late Stone Age"advocated by Hu and Gu was also directly influenced by J.G.Andersson’s An Early Chinese Culture.Conversely,American sinologist Arthur W.Hummel Sr played a key role in introducing and evaluating the first volume of Discussion of Ancient History to Western academia.Paradoxically,while Swedish sinologis Bernhard Karlgren wrote On the Authenticity and Nature of the Tso Chuan to refute Kang Youwei’s reinterpretation of Confucian Classics(The Forged Classics of the Wang Mang Period),his work however became of value for Chinese historic doubt scholars to reaffirm the value of New Text Confucianism and advance the"Discussion of Ancient History"movement.If we would like to choose a saying to describe the relationship between the"Discussion of Ancien History"movement and Western Sinology,the Chinese proverb,"Stones from other hills may serve to polish jade of this one,"may be an appropriate choice. 展开更多
关键词 Western SINOLOGY 'discussion of Ancient History' MOVEMENT HISTORY of academic EXCHANGES between China and foreign COUNTRIES
下载PDF
基于Infenion C164CI的金属带式无级变速器电控系统设计 被引量:5
3
作者 卢延辉 张友坤 +1 位作者 郑联珠 高京魁 《吉林大学学报(工学版)》 EI CAS CSCD 北大核心 2006年第B03期84-88,共5页
利用单片机技术,基于C164单片机设计开发了金属带式无级变速器的电控单元,研究了控制系统的硬件及研究了输入模块和输出模块的设计原则。控制软件采用模块化设计思想,保证对系统进行实时优化管理。为了验证系统设计的正确性,进行了台架... 利用单片机技术,基于C164单片机设计开发了金属带式无级变速器的电控单元,研究了控制系统的硬件及研究了输入模块和输出模块的设计原则。控制软件采用模块化设计思想,保证对系统进行实时优化管理。为了验证系统设计的正确性,进行了台架试验,结果表明, 电控单元能完成控制要求并具有较好的控制效果。 展开更多
关键词 车辆工程 金属带式无级变速器 电控单元 C164ci
下载PDF
Further Study to a One-Dimensional CI Transition Model
4
作者 许爱国 王光瑞 +1 位作者 陈式刚 张广才 《计算物理》 CSCD 北大核心 1998年第4期15-20,共6页
对一个一维CI相变模型进行进一步研究。外势周期D具有一个临界值Dc。D<Dc时的相图与D>Dc时的相图非常地不同。当D<Dc时,相图随D而变化,且在D的大部分区域显示出Farey树结构。当D>Dc时,相图不再变化,且... 对一个一维CI相变模型进行进一步研究。外势周期D具有一个临界值Dc。D<Dc时的相图与D>Dc时的相图非常地不同。当D<Dc时,相图随D而变化,且在D的大部分区域显示出Farey树结构。当D>Dc时,相图不再变化,且不满足Farey树结构。通过有效势F(u)研究了相变过程。 展开更多
关键词 ci相变 Farey树 有效势
下载PDF
基于Infenion C164CI单片机的汽车电子节气门控制系统设计 被引量:2
5
作者 韩玉敏 《交通科技与经济》 2007年第1期37-39,47,共4页
研究电子节气门的结构和驱动原理,针对汽车发动机节气门传统的拉索操纵方式的缺点,设计以Infenion C164CI单片机为核心的智能电子节气门控制系统,设计控制硬件和软件,开发完成节气门控制器,并对其控制效果进行测试。试验表明,使用该控... 研究电子节气门的结构和驱动原理,针对汽车发动机节气门传统的拉索操纵方式的缺点,设计以Infenion C164CI单片机为核心的智能电子节气门控制系统,设计控制硬件和软件,开发完成节气门控制器,并对其控制效果进行测试。试验表明,使用该控制器可以实现对发动机扭矩输出的控制,改善发动机和车辆的性能,为实现车辆的自动操纵奠定技术基础。 展开更多
关键词 电子节气门 C164ci 控制器
下载PDF
基于PPO算法的CIES低碳优化调度方法
6
作者 陈凡 吴凌霄 +2 位作者 王曼 吕干云 张小莲 《电力工程技术》 北大核心 2024年第6期88-99,共12页
阶梯式碳交易机制以及优化调度模型求解算法是进行园区综合能源系统(community integrated energy system,CIES)优化调度的重要因素,现有文献对这两个因素的考虑不够全面。为此,文中在考虑阶梯式碳交易机制的基础上,提出采用近端策略优... 阶梯式碳交易机制以及优化调度模型求解算法是进行园区综合能源系统(community integrated energy system,CIES)优化调度的重要因素,现有文献对这两个因素的考虑不够全面。为此,文中在考虑阶梯式碳交易机制的基础上,提出采用近端策略优化(proximal policy optimization,PPO)算法求解CIES低碳优化调度问题。该方法基于低碳优化调度模型搭建强化学习交互环境,利用设备状态参数及运行参数定义智能体的状态、动作空间及奖励函数,再通过离线训练获取可生成最优策略的智能体。算例分析结果表明,采用PPO算法得到的CIES低碳优化调度方法能够充分发挥阶梯式碳交易机制减少碳排放量和提高能源利用率方面的优势。 展开更多
关键词 园区综合能源系统(ciES) 优化调度 近端策略优化(PPO)算法 阶梯式碳交易机制 惩罚系数 碳排放
下载PDF
不同方向外电场下cis-HONO分子的结构和光谱特性
7
作者 梁冬梅 荆涛 +1 位作者 陈亮 邓明森 《西南大学学报(自然科学版)》 CAS CSCD 北大核心 2022年第5期108-118,共11页
采用密度泛函B3LYP方法,在6-311G(d,p)基组水平上研究了沿不同方向(x,y)施加外电场(-0.03~0.03)对cis-HONO分子的基态参数、总能量、电偶极矩、电荷分布、能隙及红外光谱的影响,并采用CIS方法研究了cis-HONO分子在外电场下的激发能、波... 采用密度泛函B3LYP方法,在6-311G(d,p)基组水平上研究了沿不同方向(x,y)施加外电场(-0.03~0.03)对cis-HONO分子的基态参数、总能量、电偶极矩、电荷分布、能隙及红外光谱的影响,并采用CIS方法研究了cis-HONO分子在外电场下的激发能、波长、振子强度和紫外可见吸收光谱.研究结果表明:分子的几何参数随外电场变化明显.当x方向的外电场由-0.03变化到0.03时,偶极矩(总能量)几乎呈先减小(增大)后增大(减小)的对称性变化,能隙不断增大;在y方向电场下,偶极矩先减小后增大,总能量不断减小,能隙不断减少.外电场改变了红外光谱的特征,如谐振频率发生红移或蓝移、红外峰增强或减弱现象.外电场的施加影响了cis-HONO分子的激发特性.激发能、激发波长在外电场作用下发生了显著的变化,同时,振子强度受外电场影响使禁阻跃迁变为可允许的跃迁,而可允许的跃迁在电场的作用下变为禁阻跃迁.紫外可见光谱在外电场的作用下,吸收峰发生了明显的移动,并有分裂现象发生. 展开更多
关键词 cis-HonO分子 外电场 分子结构 激发态
下载PDF
CIED植入致感染性心内膜炎合并电风暴的护理1例报告
8
作者 郭惠萍 黄清 李国琪 《岭南急诊医学杂志》 2024年第4期441-442,共2页
心脏植入式电子器械(CIED)是指心脏起搏器、植入型心律转复除颤器、心脏再同步化治疗起搏器、心脏再同步化治疗除颤器以及植入式心电事件监测器等[1]。CIED对治疗恶性心律失常和难治性心力衰竭具有显著疗效。随着植入式起搏器在临床上... 心脏植入式电子器械(CIED)是指心脏起搏器、植入型心律转复除颤器、心脏再同步化治疗起搏器、心脏再同步化治疗除颤器以及植入式心电事件监测器等[1]。CIED对治疗恶性心律失常和难治性心力衰竭具有显著疗效。随着植入式起搏器在临床上的广泛应用,起搏器感染患者数量呈上升趋势,心脏起搏器(PM)、ICD、CRT起搏器、CRT除颤器设备相关感染的发生率分别为1.19%、1.91%、2.18%、3.35%[2]。部分病人因感染加重或感染无法控制而被迫取出CIED。6%的患者在出现超过38.5℃的高热时发生致命心律失常事件,其中47%患者出现心室颤动,这可能与高热时钠离子外流显著降低,影响心室动作电位早期复极有关[3]。发热导致心室颤动的其他情况还可见于长QT综合征、特发性心室颤动、急性心肌炎等,电除颤是及时终止恶性心律失常最有效的方法。2023年10月5日,本科收治了1例因重症心肌炎致三度房室传导阻滞并心室颤动行双腔ICD植入术的患者,术后囊袋感染致感染性心内膜炎并发交感电风暴,经过积极治疗出院。现报告如下。 展开更多
关键词 ciED 交感电风暴 护理 心脏康复
下载PDF
APOE and APOC1 gene polymorphisms are associated with cognitive impairment progression in Chinese patients with late-onset Alzheimer's disease 被引量:4
9
作者 Qin Zhou Dantao Peng +11 位作者 Xinrui Yuan Zeping Lv Shenghang Pang Wenyu Jiang Chuyu Yang Xiaohong Shi Guofang Pang Yige Yang Haiqun Xie Wandong Zhang Caiyou Hu Ze Yang 《Neural Regeneration Research》 SCIE CAS CSCD 2014年第6期653-660,共8页
Current evidence shows that apolipoprotein E (APOE), apolipoprotein CI (APOC1) and low density lipoprotein receptor-related protein (LRP) variations are related to late-onset Alzheimer's disease. However, it re... Current evidence shows that apolipoprotein E (APOE), apolipoprotein CI (APOC1) and low density lipoprotein receptor-related protein (LRP) variations are related to late-onset Alzheimer's disease. However, it remains unclear if genetic polymorphisms in these genes are associated with cognitive decline in late-onset Alzheimer's disease patients. We performed a 30-month longitudi- nal cohort study to investigate the relationship between Alzheimer's disease and APOE, APOC1, and LRP. In this study, 78 Chinese Han patients with late-onset Alzheimer's disease were recruit- ed form Guangxi Zhuang Autonomous Region in China. APOE, APOC1, and LRP genotyping was performed using polymerase chain reaction-restriction fragment length polymorphisms. The Mini-Mental State Examination and Clinical Dementia Rating Scale were used to assess pa- tients' cognitive function. After a 30-month follow-up period, we found a significant reduction in Mini-Mental State Examination total score, a higher proportion of patients fulfilling cognitive impairment progression criteria, and a higher proportion of APOC1 H2 carriers in APOE 4 carriers compared with non-carriers. In addition, the APOE 4 allele frequency was significantly higher in the cognitive impairment progression group compared with the non-cognitive im- pairment progression group. In conclusion, APOE e4 plays an important role in augmenting cognitive decline, and APOC1 H2 may act synergistically with APOE ~4 in increasing the risk of cognitive decline in Chinese patients with late-onset Alzheimer's disease. 展开更多
关键词 nerve degeneration cognitive disorders DEMENTIA Alzheimer's disease polymorphism apolipoprotein E apolipoprotein ci low density lipoprotein receptor-related protein NSFC grant neural regeneration
下载PDF
Role of hepatitis B virus DNA integration in human hepatocarcinogenesis 被引量:25
10
作者 Hoang Hai Akihiro Tamori Norifumi Kawada 《World Journal of Gastroenterology》 SCIE CAS 2014年第20期6236-6243,共8页
Liver cancer ranks sixth in cancer incidence, and is the third leading cause of cancer-related deaths worldwide. Hepatocellular carcinoma (HCC) is the most common type of liver cancer, which arises from hepatocytes an... Liver cancer ranks sixth in cancer incidence, and is the third leading cause of cancer-related deaths worldwide. Hepatocellular carcinoma (HCC) is the most common type of liver cancer, which arises from hepatocytes and accounts for approximately 70%-85% of cases. Hepatitis B virus (HBV) frequently causes liver inflammation, hepatic damage and subsequent cirrhosis. Integrated viral DNA is found in 85%-90% of HBV-related HCCs. Its presence in tumors from non-cirrhotic livers of children or young adults further supports the role of viral DNA integration in hepatocarcinogenesis. Integration of subgenomic HBV DNA fragments into different locations within the host DNA is a significant feature of chronic HBV infection. Integration has two potential consequences: (1) the host genome becomes altered (&#x0201c;cis&#x0201d; effect); and (2) the HBV genome becomes altered (&#x0201c;trans&#x0201d; effect). The cis effect includes insertional mutagenesis, which can potentially disrupt host gene function or alter host gene regulation. Tumor progression is frequently associated with rearrangement and partial gain or loss of both viral and host sequences. However, the role of integrated HBV DNA in hepatocarcinogenesis remains controversial. Modern technology has provided a new paradigm to further our understanding of disease mechanisms. This review summarizes the role of HBV DNA integration in human carcinogenesis. 展开更多
关键词 Hepatitis B virus INTEGRATIon HEPATOCARciNOGENESIS cis effect Trans effect Whole genome sequencing
下载PDF
Analyzing the transient effects of 60Co gamma rays in a CIS by Monte Carlo method 被引量:1
11
作者 Yuan-Yuan Xue Zu-Jun Wang +8 位作者 Min-Bo Liu Rui Xu Hao Ning Wen Zhao Bao-Ping He Zhi-Bin Yao Jiang-Kun Sheng Wu-Ying Ma Guan-Tao Dong 《Nuclear Science and Techniques》 SCIE CAS CSCD 2019年第7期100-106,共7页
The objective of this work is to analyze the transient effects of ^60Co gamma rays in the CMOS image sensor (CIS) using the Monte Carlo method, based on Geant4. The track, energy spectrum, and angle of produced electr... The objective of this work is to analyze the transient effects of ^60Co gamma rays in the CMOS image sensor (CIS) using the Monte Carlo method, based on Geant4. The track, energy spectrum, and angle of produced electrons when gamma rays traversed a silicon or silicon dioxide cube were calculated. A simplified model of a 500 × 500 CIS array was established, and the transient effects of gamma rays in the CIS were simulated. The raw images were captured when the CIS was irradiated by gamma rays. The experimental results were compared with the simulation results. The characteristics of the typical events induced by transient effects were analyzed. 展开更多
关键词 ^60CO GAMMA RAYS Transient effects CMOS image sensor (ciS) GEANT4
下载PDF
Association between Physical Activity and Higher Serum Creatinine/Uric Acid by Dose-response Association 被引量:3
12
作者 XU Chun Jie LIU Xiao Yu +6 位作者 WANG Yong Bin GUO Chun Yue YIN Su Feng FAN Hong Min FENG FU Min YUAN Ju Xiang HU Bo 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2018年第10期769-772,共4页
Serum creatinine (Scr) and serum uric acid (sUA)arecloselyrelatedchronicdiseaseorassociated morbidity.Epidemiologicalevidenceshowsthat elevated Scr or higher sUA level are independent risk factors for cardiovascul... Serum creatinine (Scr) and serum uric acid (sUA)arecloselyrelatedchronicdiseaseorassociated morbidity.Epidemiologicalevidenceshowsthat elevated Scr or higher sUA level are independent risk factors for cardiovascular disease as well as gout and insulin resistance[1].Physicalactivity(PA)isgenerallyconsidered importantinregulatinghealth. 展开更多
关键词 ci PA RCS SAS
下载PDF
Employing Computational Intelligence to Generate More Intelligent and Energy Efficient Living Spaces 被引量:2
13
作者 Hani Hagras 《International Journal of Automation and computing》 EI 2008年第1期1-9,共9页
Our living environments are being gradually occupied with an abundant number of digital objects that have networking and computing capabilities. After these devices are plugged into a network, they initially advertise... Our living environments are being gradually occupied with an abundant number of digital objects that have networking and computing capabilities. After these devices are plugged into a network, they initially advertise their presence and capabilities in the form of services so that they can be discovered and, if desired, exploited by the user or other networked devices. With the increasing number of these devices attached to the network, the complexity to configure and control them increases, which may lead to major processing and communication overhead. Hence, the devices are no longer expected to just act as primitive stand-alone appliances that only provide the facilities and services to the user they are designed for, but also offer complex services that emerge from unique combinations of devices. This creates the necessity for these devices to be equipped with some sort of intelligence and self-awareness to enable them to be self-configuring and self-programming. However, with this "smart evolution", the cognitive load to configure and control such spaces becomes immense. One way to relieve this load is by employing artificial intelligence (AI) techniques to create an intelligent "presence" where the system will be able to recognize the users and autonomously program the environment to be energy efficient and responsive to the user's needs and behaviours. These AI mechanisms should be embedded in the user's environments and should operate in a non-intrusive manner. This paper will show how computational intelligence (CI), which is an emerging domain of AI, could be employed and embedded in our living spaces to help such environments to be more energy efficient, intelligent, adaptive and convenient to the users. 展开更多
关键词 Computational intelligence ci fuzzy systems neural networks (NNs) genetic algorithms (GAs) intelligent buildings energy efficiency.
下载PDF
DFT and Position of Cl Substitution (PCS) Methods Studies on n-Octanol/water Partition Coefficients (lgK_(ow)) and Aqueous Solubility (–lgS_w) of All PCDD Congeners 被引量:5
14
作者 谢亚杰 赵惠明 +1 位作者 王遵尧 张雅荣 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2007年第12期1409-1418,共10页
Optimized calculations of 75 PCDDs and their parent DD were carded out at the B3LYP/6-31G* level by density functional theory (DFT) method. The structural parameters were obtained and significant correlation betwee... Optimized calculations of 75 PCDDs and their parent DD were carded out at the B3LYP/6-31G* level by density functional theory (DFT) method. The structural parameters were obtained and significant correlation between the C1 substitution position and some structural parameters was found. Consequently, the number of C1 substitution positions was taken as theoretical descriptors to establish two novel QSPR models for predicting lgKow and -lgSw of all PCDD congeners. The two models achieved in this work contain two variables (Na and Nβ), of which r = 0.9312, 0.9965 and SD = 0.27, 0.12 respectively, and t values are all large. The variation inflation factors (VIF) of variables in the two models herein are both less than 5.0, suggesting high accuracy of the lgKow and -lgSw predicting models, and the results of cross-validation test also show that the two models exhibit optimum stability and good predictive power. By comparison, the correlation and predictive ability of the present work are more advantageous than those obtained using semi-empirical AM1 and GC-RI methods. 展开更多
关键词 polychlorinated dibenzo-p-dioxins (PCDDs) n-octanol/water partition coefficients(lgKow) aqueous solubility (-lgSw) quantitative structure-property relationship (QSPR) DFT position of ci substitution (PCS) method
下载PDF
Research on Spatial Changes of Negative Air Ion Concentration in Hefei City 被引量:1
15
作者 XIA Shang-guang YAN Ping +1 位作者 YE Fei LIU He-jun 《Meteorological and Environmental Research》 CAS 2012年第1期14-17,共4页
[Objective] The study aimed to discuss the spatial changes of negative air ion concentration in Hefei City. [Method] Based on the observation of air ions, temperature, relative humidity, the spatial changes of negativ... [Objective] The study aimed to discuss the spatial changes of negative air ion concentration in Hefei City. [Method] Based on the observation of air ions, temperature, relative humidity, the spatial changes of negative air ion concentration in different districts of Hefei City were ana- lyzed firstly, then the correlation between negative air ion concentration and meteorological factors was discussed. [ Result] Air cleanliness index (CI) of the parks, residential areas, industrial regions, transport stations and prosperous commercial districts was 0.86, 0.53, 0.37, 0.26 and 0.17 respectively, and the latter two regions suffered mild and moderate pollution separately. Daily variations of negative air ion concentration in the residential areas and parks of Hefei City were obvious, showing U shape, that is, the maximum values appeared in the morning and evening, while the minimum values could be found around 14 :(30. There was no distinctly regular variation of negative air ion concentration in the prosperous com- mercial districts, transport stations and industrial areas. In Hefei City, the concentration of negative air ions showed an increasing trend from the ur- ban districts to the suburban districts; it was obviously higher in the residential areas and parks with numerous plants and waters compared with the prosperous commercial districts and transport stations. Negative air ion concentration correlated with relative humidity positively and temperature negatively, so the main meteorological factors influencing the negative air ion concentration in Hefei City were temperature and relative humidity. [ Coedusloa] The research could provide scientific references for city planning and greenbelt construction in future. 展开更多
关键词 Negative air ions Air cleanliness index ci Spatial variation -Meteorological factors China
下载PDF
N-acetylcysteine attenuates reactive-oxygen-speciesmediated endoplasmic reticulum stress during liver ischemia-reperfusion injury 被引量:13
16
作者 Yong Sun Li-Yong Pu +3 位作者 Ling Lu Xue-Hao Wang Feng Zhang Jian-Hua Rao 《World Journal of Gastroenterology》 SCIE CAS 2014年第41期15289-15298,共10页
AIM: To investigate the effects of N-acetylcysteine (NAC) on endoplasmic reticulum (ER) stress and tissue injury during liver ischemia reperfusion injury (IRI).
关键词 N-ACETYLCYSTEINE Reactive oxygen species Endoplasmic reticulum stress APOPTOSIS Liver ischemia-reperfusion
下载PDF
Chronic toxicity and cytotoxicity of synthetic pyrethroid insecticide cis-bifenthrin 被引量:10
17
作者 WANG Cui CHEN Fang +1 位作者 ZHANG Quan FANG Zhuo 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2009年第12期1710-1715,共6页
With the increasing use of synthetic pyrethroids (SPs), the significance of ecological safety and health risk is an emerging concern, In this study, we evaluated the chronic aquatic toxicity of eis-bifenthrin (cis... With the increasing use of synthetic pyrethroids (SPs), the significance of ecological safety and health risk is an emerging concern, In this study, we evaluated the chronic aquatic toxicity of eis-bifenthrin (cis-BF) in Daphnia magna and its cytotoxicity in Chinese hamster ovary (CHO) cells as well as human cervical carcinoma (Hela) ceils. Chronic aquatic toxicity tests showed that cis-BF could significantly affect the reproduction of D. magna. The lowest observed effective concentration and the non-observed effective concentration of cis-BF to D. magna were 0.02 and 0.01 μg/L, respectively, and the chronic value was 0.014 μg/L. The intrinsic rate of natural increase was significantly decreased (p 〈 0.05) to 0.02 μg/L. The cytotoxicity assay demonstrated that cis-BF decreased cell viability in CHO and Hela cells in a concentration- and time-dependent manner. The IC50 values for Hela and CHO cells were 4.0 × 10^-5 and 3.2 × 10^-5 mol/L, respectively. Together, these results indicated that cis-BF induced chronic toxicity in both aquatic invertebrate animals and mammalian cells. These findings assist in understanding the impact of SPs on health and environmental safety. Considering the wide spectrum of SPs, a more comprehensive understanding of the negative effects is indispensible for planning future application and regulation of these pesticides. 展开更多
关键词 cis-bifenthrin Daphnia magna chronic toxicity CYTOTOXIciTY
下载PDF
Feature Extraction and Diagnosis System Using Virtual Instrument Based on CI 被引量:1
18
作者 Renping Shao Xinna Huang Yonglong Li 《Journal of Software Engineering and Applications》 2010年第2期177-184,共8页
Through investigating intelligent diagnosis method of Computational Intelligence (CI) and studying its application in fault feature extraction, a gear fault detection and Virtual Instrument Diagnostic System is develo... Through investigating intelligent diagnosis method of Computational Intelligence (CI) and studying its application in fault feature extraction, a gear fault detection and Virtual Instrument Diagnostic System is developed by using the two hybrid programming method which combines both advantages of VC++ and MATLAB. The interface is designed by VC++ and the calculation of test data, signal processing and graphical display are completed by MATLAB. The pro-gram converted from M-file to VC++ is completed by interface software, and a various multi-functional gear fault di-agnosis software system is successfully obtained. The software system, which has many functions including the intro-duction of gear vibration signals, signal processing, graphical display, fault detection and diagnosis, monitoring and so on, especially, the ability of diagnosing gear faults. The method has an important application in the field of mechanical fault diagnosis. 展开更多
关键词 Virtual Instrument (VI) COMPUTATIonAL INTELLIGENCE (ci) FAULT Diagnosis Feature Extraction GEAR System
下载PDF
Land Eco-sensitivity Assessment of Ecological Cities Based on LUCC 被引量:1
19
作者 LIU Yan-xu LI Chun-yue +1 位作者 REN Zhi-yuan HE Yan-fen 《Asian Agricultural Research》 2012年第12期49-54,共6页
Land eco-sensitivity assessment is an important method in analyzing regional eco-environmental safety. This article is based on the studies of land use and coverage change (LUCC) with the interpretation result from La... Land eco-sensitivity assessment is an important method in analyzing regional eco-environmental safety. This article is based on the studies of land use and coverage change (LUCC) with the interpretation result from Landsat images. It analyzes the land use degree of Shangluo City and gives the land eco-sensitivity classification, which includes soil and water conservation, disaster prevention and eco-environmental protection. Then an improved classification model is taken through the gray model and the variation coefficient. By comparing sensitivity in each level of land use degree change, the ecological recovery mode in study area is analyzed. The results show: the land use degree in Shangluo City has been declining from 1990 to 2009, with large area converted form cropland to forest, environment becomes better; the sensitivities of zoning based on the index level shows the medium sensitive area was largest. According to the variation coefficient gives the more reasonable proportion, the zoning was improved based on uncertainties. Because of the least amount of land use degradation area was taken in high sensitive region, it is considered that the ecological construction model in study area was still worth discussing. The healthy ecological development mode is proposed that low sensitive region should be protected while high sensitive region should receive high attention, so as to further improve the regional ecological security and improve the living environment efficiently. 展开更多
关键词 LAND use degree Sensitivity ASSESSMENT SHANGLUO ci
下载PDF
Isolation and analysis of a TIR-specific promoter from poplar 被引量:12
20
作者 Zheng Hui-quan Lin Shan-zhi Zhang Qian Zhang Zhen-zhen Zhang Zhi-yi Lei Yang Hou Lu 《Forestry Studies in China》 CAS 2007年第2期95-106,共12页
A 5' flanking region of the well-conserved Toll/interleukin-1 receptor domain (TIR)-encoding sequence was isolated from the genomic DNA ofMelampsora magnusiana Wagner resistant clones of hybrid triploid poplars [(... A 5' flanking region of the well-conserved Toll/interleukin-1 receptor domain (TIR)-encoding sequence was isolated from the genomic DNA ofMelampsora magnusiana Wagner resistant clones of hybrid triploid poplars [(Populus tomentosa × P. bolleana) × P. tomentosa]. Sequencing results and alignment analysis show that the obtained TIR-specific promoter (named as PtTIRp01) was 1,732 bp in length; moreover 3' region of the PtTIRp01 contains a responds to the 5' composition of TIR-NBS type gene PtDRG02, of 747 bp long 5' region of TIR-NBS type gene PtDRG02 and its 398 bp complete TIR-encoding sequence, which significantly corindicating that the obtained TIR-specific promoter region consists upstream region of promoter (985 bp). It was found that the 5' region of TIR-NBS type gene PtDRG02 was characterized in the downstream region of the transcriptional start, named as 5'-untranslated region (5' UTR), consisting of one 93 bp 5'-untranslation exon, one 213 bp intron and one 441 bp TIR-encoding open reading frame (ORF). In addition, several putative cis-acting motifs were present in the obtained TIR-specific promoter of PtDRG02, including one TATA box, one GC-rich, one AT-rich, one P-box, one 3-AF1 binding site, two CAAT boxes, two GT-1 motifs, three typical W-boxes, four I-boxes, and one multi-cis-acting fragment (MCF). The latter contains five types of regulatory elements (E4, G-box, ABRE motif, box 1 and HVA 1 s), most of which were homologous to the cis-acting regulatory elements involved in the activation of defense genes in plants. Thus, it can be suggested that TIR-specific promoter might be a pathogen-inducible promoter and be necessary for the inducible expression of defense-related genes. Key words Toll/interleukin- 1 receptor domain, promoter, Cis-acting element, poplar 展开更多
关键词 Toll/interleukin- 1 receptor domain PROMOTER cis-acting element POPLAR
下载PDF
上一页 1 2 250 下一页 到第
使用帮助 返回顶部