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Search Results: 1 - 10 of 93033 matches for " 焦江丽 "
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基于Internet的远程控制机器人系统结构设计
张毅,
重庆邮电大学学报(自然科学版) , 2006,
Abstract: 针对新一代网络移动机器人特点,构建了包括Web中心服务器、机器人控制服务器、图像服务器的遥操作移动机器人系统,该系统为研究者或机器人爱好者提供了一个远程控制移动机器人的试验平台,整个系统可加入更多的移动机器人,连接更多的图像摄像机,具有一定的开放性。
额尔齐斯河白斑狗鱼寄生单肠四钩虫的种群生态学研究
,,汪博良,加玛·买买提,岳城
干旱区研究 , 2011,
Abstract: 通过野外取样调查,对额尔齐斯河白斑狗鱼鳃部寄生的单肠四钩虫(Tetraonchusmonenteron)的种群生态学进行了研究。结果表明感染率、感染强度在不同的宿主体长组表现出不同的变化趋势,平均感染率为45.4%,而平均感染强度为11.8±6.05,随着宿主体长的增大,单肠四钩虫的感染率逐渐减小,而感染强度却逐渐增大;平均丰度和方差均比则随宿主体长的增大而出现先增大后减小的变化趋势,且方差均比(S/X)在不同的宿主体长组中均大于1,表明单肠四钩虫在宿主白斑狗鱼种群中均呈聚集分布,且聚集强度随着平均丰度的增加而增加。
RDX粒度对改性双基推进剂性能影响
清介,,任慧,,
含能材料 , 2007,
Abstract: 实验研究了工业级RDX粒度对复合改性双基推进剂(CMDB)力学、燃烧及感度性能的影响。结果表明:黑索今平均粒径从92.02μm减小到17.35μm时,相应地固体推进剂高温最大抗张强度提高54%,低温延伸率提高85%;推进剂的燃速在不同压力下均有增加,最大增加11.5%;撞击感度特性落高增加5.1cm,摩擦感度爆炸百分率下降75%。
负载零价铁膨胀石墨的合成及对水中NO3-去除的效果与机制
徐从斌,,杨文杰,孙宏亮,刘伟,振寰,春磊,林爱军
- , 2017,
Abstract: 摘要 以网络状孔型结构发达的膨胀石墨(EG)为载体,采用化学沉积法制备了负载零价铁(ZVI)的膨胀石墨(EG-ZVI).利用扫描电子显微镜(SEM)、X射线衍射(XRD)仪及X射线光电子能谱仪(XPS)等对负载及反应前后的EG-ZVI进行表征,探究了EG-ZVI对硝酸根(NO3-)的去除效果并对其反应产物及机理进行了分析.结果表明,亚微米级零价铁已负载到EG石墨表面,且分布均匀;与EG相比,EG-ZVI对NO3-的去除能力显著提升,其去除率是EG的2.3倍.得益于铁碳原电池效应,EG-ZVI对pH依赖性比零价铁低,即使在pH=9的条件下,NO3-去除率依然能达到65%以上,是单独用零价铁处理时的1.83倍;EG-ZVI去除NO3-是吸附和还原过程共同作用的结果,符合三级动力学模型,其还原过程由负载在EG表面的零价铁发生腐蚀提供电子,从而还原NO3-产生以NH4+-N为主的含氮化合物;EG-ZVI对NO3-具有较强的还原吸附作用,并能解决零价铁在反应过程中生成惰性层或金属氢氧化物导致去除效率低的缺陷,使其在含NO3-废水的处理中具有较高的应用潜力
Architecture design for internet-based telerobots system
基于Internet的远程控制机器人系统结构设计

ZHANG Yi,JIAO Jiang-li,
张毅
,

重庆邮电大学学报(自然科学版) , 2006,
Abstract: 针对新一代网络移动机器人特点,构建了包括Web中心服务器、机器人控制服务器、图像服务器的遥操作 移动机器人系统,该系统为研究者或机器人爱好者提供了一个远程控制移动机器人的试验平台,整个系统可加入 更多的移动机器人,连接更多的图像摄像机,具有一定的开放性。
ATP是构建类似C4水稻的重要限制因素
张边,,陈全战,华春,德茂
华北农学报 , 2009, DOI: 10.7668/hbnxb.2009.04.004
Abstract: 为了分析ATP是否是转PEPC+PPDK基因水稻或转PEPC+PPDK+ME基因水稻CO2浓缩过程的限制因素,以原种和不同转C4光合酶基因水稻为材料,测定了C4光合酶活性、光合速率以及活性氧代谢有关指标,结果表明:原种中具有全套的C4光合酶,但活性很低,而不同转C4光合酶基因水稻高表达了相应的C4酶活性.在高光条件下,与原种相比较,转PPDK基因水稻的光合速率未增加;转ME基因水稻的光合速率降低了.1%;转PEPC+PPDK双基因水稻与转PEPC基因水稻相近.ATP和ATP激活剂NaHSO3处理后,可显著提高转PEPC+PPDK双基因水稻和转PEPC+PPDK+ME基因水稻的光合放氧速率,达到玉米的80.7%,显现出类似C4的光合特点,表明ATP是构建类似C4水稻的重要限制因素.光氧化条件下,转PEPC+PPDK+ME基因水稻的耐光氧化能力得到进一步的增强.这些结果为构建C4水稻提供了技术途径.
牙龈卟啉单胞菌感染对大鼠血管平滑肌细胞细胞间黏附分子-1表达的影响
代佳音,,毕良佳,,王强
华西口腔医学杂志 , 2014, DOI: 10.7518/hxkq.2014.02.002
Abstract: 目的观察牙龈卟啉单胞菌ATCC33277感染对大鼠血管平滑肌细胞(VSMC)细胞间黏附分子-1(ICAM-1)表达的影响。方法建立体外牙龈卟啉单胞菌感染大鼠VSMC模型,逆转录-聚合酶链反应(RT-PCR)检测ICAM-1基因的表达。结果牙龈卟啉单胞菌感染VSMC8、16、24h后,ICAM-1表达明显增多,与空白对照组比较,差异有统计学意义(P<0.05)。感染16h达高峰,感染8h与感染16、24h比较,差异有统计学意义(P<0.05)。结论牙龈卟啉单胞菌感染可引起VSMCICAM-1高表达,这提示牙周致病菌可能参与血管壁的炎症反应,在动脉粥样硬化的发生、发展中有重要的意义。
海因/三嗪类复合键合剂包覆黑索今的研究
,清介,任慧,,赵伟栋
含能材料 , 2008,
Abstract: 采用水-溶液悬浮法,对海因/三嗪类复合键合剂包覆RDX进行了实验研究。通过L9(34)正交实验研究了反应时间、反应温度、键合剂用量和搅拌速度对包覆度的影响规律,并利用X射线光电子能谱(XPS)、扫描电镜(SEM)、傅里叶变换红外光谱(FTIR)、差示扫描量热法(DSC)、感度实验等对包覆后的RDX进行表征。正交实验确定的最佳包覆条件:10gRDX,反应时间90min,反应温度50℃,键合剂用量0.3g,搅拌速度700r·min-1,包覆度达87%。包覆后RDX表面明亮有光泽,包覆厚度约为0.2μm。红外光谱中NO2基团的吸收峰红移22cm-1至1510cm-1,且吸收带展宽。热分解峰温升高0.4℃,撞击感度特性落高提高4.5cm。
Stroop范式中不同语言条件下的双语优势效应
高姗,,刘毅,闻素霞,邱旭升
- , 2017,
Abstract: 摘要: 目的:采用Stroop范式探讨不同语言条件下的双语优势效应。方法:两个实验均为2(被试类型)x3(色词一致性)的混合实验设计,被试为熟练双语者和非熟练双语者。结果:(1)L1条件下熟练双语者的Stroop效应量小于非熟练双语者,L2条件下无显著差异。(2)熟练双语者在两个实验条件下的平均反应时均小于非熟练双语者,L2条件下的易化效应量显著大于非熟练双语者。结论:(1)熟练双语者在L1条件下的抑制控制能力好于非熟练双语者,体现了“双语优势效应”;(2)熟练双语者在Stroop干扰任务中可能比非熟练双语者具有更好的信息监控能力。
Abstract: Purposes: "Bilingual advantage effect" refers to the positive impact on cognitive abilities obtained from the bilingual learning or experience.Some researches believed that the most important mechanism of "Bilingual advantage effect" is inhibitory control,But the cognitive mechanism of this effect is still debate in recent studies. This research adopted the stroop paradigm to examine the mechanism of "bilingual advantage effect" under the condition of language1, language2 and combination of these two languages. Subjects were skilled bilingual and unskilled one whose language1 is Uyghur and language2 is Chinese.Then discussed the difference of bilingual’s inhibitory control and facilitate effect under the different languages in the stroop task. Procedures: The research included three experiments, all used Stroop task. These experiments were all designed by 2 type (subjects) x3 (color word conditions) . Experiment one for L1 condition, experiment two for L2 condition,experiment three was a mixture of L1 and L2 condition designed. There were 43 subjects participated in the experiment.Used E - Prime 2.0 software programming, the participant’s task was to react to the color of the word and then makes the corresponding button, the program automatically record the subjects reaction time and error rate. Results: Three subjects was eliminated because of high errors,then reaction time and error rate of 40 subjects were analyzed by repetitive measure analysis of variance, the Results showed that: (1) Under the condition of L1 there is a significant difference between these two type of subjects, namely skilled bilingual Stroop effect size (18 ms) was less than the unskilled bilingual (33 ms), t (33) 6 1 = 3.56, p < 0.05, Cohen 's d = 0.32. There was no significant difference under the condition of L2 and mixed language.(2) In all three experiments the average reaction time of skilled bilinguals were less than the unskilled bilinguals. Especially under the condition of L2 skilled bilinguals’ facilitation effect quantity is significantly greater than the unskilled bilinguals, t (1, 20) = 3.07, p < 0.05, Cohen 's d = 0.43. There was no significant main effects and interaction in the analysis of error rate.Conclusions: (1) In the paradigm of stroop task skilled bilingual is
江西大湖塘钨矿床钨成矿机制研究
The Precipitation Mechanism of Tungsten from the Dahutang Tungsten Deposit in Jiangxi Province
 [PDF]

媛媛,
Open Journal of Nature Science (OJNS) , 2016, DOI: 10.12677/OJNS.2016.41004
Abstract:
江西省大湖塘钨矿为已探明资源储量世界级超大型钨矿床,其矿化以白钨矿为主。本文在野外实地工作的基础上,以地球化学热力学理论为指导,结合流体包裹体实验和岩矿鉴定,研究探讨了大湖塘矿床中钨的沉淀机制。研究表明,成矿热液富含K+,Na+,Fe,Mn,F?,Cl?等离子和CO2等挥发分,其通过萃取母岩及围岩中的钨,以氟羟基硫络合物的形式迁移,在温度、压力、pH值和挥发分等因素的综合作用下,钨的络合物分解,生成白钨矿沉淀富集,由此形成大湖塘超大型钨矿床。
The Dahutang tungsten deposit, which is located in Jiangxi province, is a worldwide super large tungsten deposit. The ore is mainly composed of scheelite. This paper studied and analyzed the precipitation mechanism of tungsten, based on the fieldwork in Dahutang and tests indoor, guided by geochemical thermodynamics theory. The research shows that the ore-bearing hydrothermal solution, which is rich in ions like K+, Na+, Fe, Mn, F?, Cl? and fugitive constituent like CO2, extracted tungsten from mother rocks and country rocks, and then tungsten was migrated by the form of fluorine hydroxyl complex. Under the action of temperature, pressure, pH and fugitive constituent, the complex of tungsten decomposed, and then scheelite formed, precipitated and concentrated, this developed the Dahutang as a super large deposit.
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