检索结果-南通市图书馆

Hysteresis of a periodic or leaking western boundary current flowing by a gap

Acta Oceanologica Sinica 2019年第4期38卷 90-96页

作者： xinxin song Dongliang Yuan Zheng Wang Key Laboratory of Ocean Circulation and Waves Institute of OceanologyChinese Academy of Sciences College of Meteorology and Oceanography National University of Defense Technology Key Laboratory of Marine Science and Numerical Modeling First Institute of OceanographyMinistry of Natural Resources University of Chinese Academy of Sciences Function Laboratory for Ocean Dynamics and Climate Pilot National Laboratory for Marine Science and Technology (Qingdao)

A 1.5-layer quasi-geostrophic reduced gravity model is used to study the hysteresis of a periodic or leaking western boundary current(WBC) flowing by a gap. When the periods of the WBC variations are much longer than the Rossby adjustment time scales of the circulation in the vicinity of the gap, the Hopf bifurcations during the Reincrease and Re-decrease loops are delayed to produce a new domain of hysteresis of the Reynolds numbers, and the critical Reynolds numbers of the WBC regime transitions change significantly, with the domain of the hysteresis Reynolds number larger for shorter periodic forcing. When the periods of the WBC variations are comparable to those of the Rossby adjustment time scales of the circulation in the vicinity of the gap, the WBC path inside the gap becomes periodic without hysteresis. The intrusion of the WBC into the western basin generally gets smaller as the period decreases. In addition, the partial leakage of the WBC transport through the gap into the western basin is found to have significant impact on the hysteresis loop of the WBC path when the leaked transport is larger than 1/2 of the WBC. Both the intrusion extent and the critical Reynolds numbers of the WBC regime transition are changed, and the larger the throughflow transport, the larger the change.

关键词： hysteresis periodic western boundary current throughflow

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A Computational Study on the Discharge Characteristics of Atmospheric Dielectric Barrier Discharges at a Constant Power

引用

Plasma Science and Technology 2013年第10期15卷 1025-1030页

作者： song xinxin TAN Zhenyu CHEN Bo ZHANG Yuantao School of Electrical Engineering Shandong University Jinan 250061 China State Gride of China Technology College Jinan 250002 China

The study on homogeneous DBDs at atmospheric pressure has attracted much attention for their advantages in applications. Tremendous work has been conducted both experimentally and numerically at a constant applied voltage or driving frequency. However the investigation of dielectric barrier discharges is still scarce for a constant power or power density. In this work, a new computational approach for DBDs is developed to explore atmospheric DBDs at a constant power based on a one-dimensional fluid model. The frequency and gap spacing effects on the atmospheric plasmas are systematically analyzed based on computational data. The computational results show that at a constant power both the current density and the amplitude of the applied voltage decrease, whereas the current pulse width increases, with increasing frequency. The simulation also indicates that as the gap spacing is raised with a fixed power and frequency, the current density and electron density increase initially, then reach their peak values, and then decrease, which means that there are maximum values for both of them. These results are significant for many industrial applications, as they can be used to optimize plasma devices of DBDs with the consideration of power consumption.

关键词： atmospheric dielectric barrier discharges simulation frequency gas spacing constant power

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Tunable LCST-type phase behavior of [FeCl4]--based ionic liquids in water

引用

Science China Chemistry 2016年第5期59卷 587-593页

作者： Yuanchao Pei Yuan Cao Yanjie Huang xinxin song Huiyong Wang Yuling Zhao Jianji Wang Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals Key Laboratory of Green Chemical Media and ReactionsMinistry of EducationSchool of Chemistry and Chemical EngineeringHenan Normal UniversityXinxiang 453007China

In this work, 16 kinds of [FeCl4]--based magnetic ionic liquids （ILs） with different cation structures have been designed and synthesized, and their structures are characterized by IR and Raman spectroscopy. Then the lower critical solution temperature （LCST）-type phase behavior of these magnetic ILs in water is investigated as a function of concentration. It is shown that cat- ion structure, alkyl chain length and molar ratio of FeCl3/chloride IL have a significant influence on the LCST of the mixtures. The phase separation temperature can be tuned efficiently by these factors. Meanwhile, the LCST-type phase separation pro- cess is also investigated by dynamic light scattering. The results support the mechanism that the hydrogen bonds of the [Fefl4]- anion with water have been gradually disrupted to form ILs aggregates with increasing temperature. In addition, the stability of the ILs in water is also examined in some details. These LCST-type phase separation systems may have potential applications in extraction and separation techniques at room temperature.

关键词： magnetic ionic liquids IR and Raman spectroscopy lower critical solution temperature tunable phase separation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Migration of mesoscale eddies across a leaping or penetrating western boundary current in the vicinity of a gap

引用

Journal of Oceanology and Limnology 2018年第6期36卷 2098-2109页

作者： song xinxin YUAN Dongliang LI Ruixiang WANG Zheng Key Laboratory of Ocean Circulation and Waves Institute of OceanologyChinese Academy of Sciencesand Function Laboratory for Ocean Dynamics and ClimateQingdao National Laboratory for Marine Science and TechnologyQingdao 266071China Key Laboratory of Marine Science and Numerical Modeling First Institute of OceanographyState Oceanic Administrationand Laboratory for Regional Oceanography and Numerical ModelingQingdao National Laboratory for Marine Science and TechnologyQingdao 266061China University of Chinese Academy of Sciences Beijing 100049China South China Sea Marine Survey and Technology Center State Oceanic AdministrationGuangzhou 510300China

A 1.5-layer quasi-geostrophic reduced gravity ocean circulation model is used to study the propagation of mesoscale eddies across a western boundary current(WBC) either leaping across or penetrating in an anti-cyclonic path through the gap. The steady leaping WBC nearly blocks all eddies from propagating across it through the gap completely. However, both cyclonic and anti-cyclonic eddies can migrate across a penetrating WBC in the vicinity of a gap, while inducing an opposite type of eddies on the cyclonic side of the WBC by weakening or strengthening the intrusion of the WBC. Both type of eddies gained strength from the WBC in the course of the propagation across the WBC in the gap. Eddies approaching the gap from the upstream are found to migrate more easily into the western basin due to the advection of the WBC. The migration speeds of the eddies are almost unchanged by the presence of the WBC in all experiments.

关键词： mesoscale eddy Western Boundary Current gap

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Electrolyte additive enhances the electrochemical performance of Cu for rechargeable Cu//Zn batteries

引用

Journal of Energy Chemistry 2023年第2期77卷 172-179,I0005页

作者： xinxin song Chenggang Wang Dongdong Wang Huili Peng Cheng Wang Chunsheng Wang Weiliu Fan Jian Yang Yitai Qian Key Laboratory of Colloid and Interface Chemistry Ministry of EducationSchool of Chemistry and Chemical EngineeringShandong UniversityJinan 250100ShandongChina Hefei National Laboratory for Physical Science at Microscale Department of ChemistryUniversity of Science and Technology of ChinaHefei 230026AnhuiChina

Cu-based cathodes in aqueous batteries become very attractive in view of high theoretical capacity,moderate operation voltage and rich reserves of raw ***,their applications are obstructed by serious side *** side reaction mainly arises from the spontaneous formation of Cu_(2)O,which occupies the electrode surface and lowers the reaction ***,Na_(2)EDTA is introduced to address these *** experimental results and theoretical calculations indicate that the Na_(2)EDTA reshapes the solvation structure of Cu^(2+)and modifies the electrode/electrolyte ***,the redox potential of Cu^(2+)/Cu_(2)O is reduced and the surface of Cu is protected from H2O,thereby inhibiting the formation of Cu_(2)***,the change in the solvation structure reduces the electrostatic repulsion between Cu^(2+)and the cathode,leading to high local concentration and benefiting uniform *** results shed light on the applications of rechargeable Cu-based batteries.

关键词： Cu Zn Reaction mechanisms Electrolyte additive Rechargeable batteries

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Co_(3)O_(4) with ordered pore structure derived from wood vessels for efficient Hg^(0) oxidation

引用

Chinese Journal of Chemical Engineering 2022年第10期50卷 215-221页

作者： Xiaopeng Zhang Cheng Gao Ziwei Wang Ximiao Wang Jie Cheng xinxin song Xiangkai Han Ning Zhang Junjiang Bao Gaohong He State Key Laboratory of Fine Chemicals Dalian University of TechnologyDalian 116023China School of Chemical Engineering Dalian University of TechnologyPanjin 124221China

Catalytic oxidation of Hgo to Hg~O is an efficient way to remove Hg^(0) from coal-fired flue *** catalyst with ordered pore structure can lower mass transfer resistance resulting in higher Hg^(0) oxidation ***,in the present work,wood vessels were used as sacrificial template to obtain Co_(3)O_(4) with ordered pore *** and BET results show that,when the mass concentrations of Co(NO_(3))_(2)·6H_(2)O was 20%,the obtained catalyst(Co_(3)O_(4) [20%Co(NO_(3))_(2)])possesses better pore structure and higher surface *** will expose more available surface active sites and lower the mass transfer ***,XPS results prove that Co_(3)O_(4) [20%Co(NO_(3))_(2)]has the highest ratio of chemisorbed oxygen which plays an important role in Hg^(0) oxidation *** results lead to a better Hg^(0) oxidation efficiency of Co_(3)O_(4) [20%Co(NO_(3))_(2)],which is about 90%in the temperature range of 200 to 350℃,Furthermore,Co_(3)O_(4) [20%Co(NO_(3))_(2)]has a stable catalytic activity,and its Hg^(0) oxidation efficiency maintains above 90%at 250℃even after 90 h test,A probable reaction mechanism is deduced by the XPS results of the fresh,used and regenerated catalyst of Co_(3)O_(4) [20%Co(NO3)2].Chemisorbed oxygen can react with Hg^(0) forming HgO with the reduction of Co^(3+)to Co^(2)+.And lattice oxygen and gaseous oxygen can supplement the consumption of chemisorbed oxygen to oxidize Co^(2+)to Co^(3+).

关键词： Wood vessel Elemental mercury Co_(3)O_(4) Ordered porestructure

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Decoding the proteostasis network in resistance to KRAS inhibitors

引用

The Innovation 2023年第6期4卷 7-8页

作者： xinxin song Zhuan Zhou Kenneth D.Westover Department of Surgery University of Texas Southwestern Medical CenterDallasTX 75390USA Departments of Radiation Oncology and Biochemistry University of Texas Southwestern Medical CenterDallasTX 75390USA

The Kirsten rat sarcoma(KRAS)gene,which is one of the most frequently mutated genes in human cancers,has long captured the attention of *** recent approval of KRAS G12C inhibitors(KRASi),such as sotorasib and adagrasib,has signaled a promising turn in cancer ***,emerging resistance to these drugs presents a fomidable challenge.'Lv et al's2 publication in Science suggests that the proteostasis network plays a role in mediating diverse KRASi resistance *** work shows that KRAS inhibition suppresses protein quality control in the majority of cancer *** the remaining cells,a subset can reactivate one of the endoplasmic reticulum(ER)stress sensors,specifically the inositol-requiring enzyme 1 alpha(IRE1a)branch of the unfolded protein response(UPR).This adaptation enables the cells to overcome their reliance on oncogenic KRAS,enhancing their resistance to KRASi(Figure 1).This insight underscores the complex interplay be tween oncogenic signaling and protein quality control in scenarios of drug ***,we review and discuss the major findings of this study in the following sections.

关键词： KRAS resistance network

来源：

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

布鲁菌性睾丸炎超声表现一例

引用

中华医学超声杂志（电子版） 2021年第12期18卷 1221-1223页

作者：宋欣昕刘冬首都医科大学附属北京友谊医院超声科 100050

患者,男性,56岁,因“间断发热2年余,再发10 d”于2020年3月入院。患者于2018年4月无明显诱因出现发热,体温最高39℃,伴畏寒、寒战,全身肌肉关节痛,遂就诊首都医科大学附属北京友谊医院,实验室检查虎红平板凝集试验呈阳性,结合症状及病... 详细信息

患者,男性,56岁,因“间断发热2年余,再发10 d”于2020年3月入院。患者于2018年4月无明显诱因出现发热,体温最高39℃,伴畏寒、寒战,全身肌肉关节痛,遂就诊首都医科大学附属北京友谊医院,实验室检查虎红平板凝集试验呈阳性,结合症状及病史诊断为布鲁氏菌病。2020年3月患者无明显诱因再次出现发热,体温最高38℃,伴畏寒、寒战,全身肌肉关节痛,右大腿根部剧烈疼痛,伴尿频、尿急、尿痛,无头痛、咳嗽、咳痰等症状,故再次就诊首都医科大学附属北京友谊医院。

关键词：北京友谊医院肌肉关节痛大腿根部布鲁氏菌病超声表现咳痰虎红平板凝集试验布鲁菌

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

开绕组磁场调制永磁直线电机的单位功率因数弱磁控制

引用

电工技术学报 2021年第5期36卷 893-901页

作者：宋鑫鑫赵文祥成瑀江苏大学电气信息工程学院镇江212013

磁场调制永磁直线(FMPML)电机因其低成本、高推力密度、高效率等优点,适合于长行程应用等领域。但是,该类电机功率因数较低,增大了电源的无功压力;固定直流母线电压时,调速范围较窄。针对上述问题,提出一种飞跨电容开绕组FMPML电机的单... 详细信息

磁场调制永磁直线(FMPML)电机因其低成本、高推力密度、高效率等优点,适合于长行程应用等领域。但是,该类电机功率因数较低,增大了电源的无功压力;固定直流母线电压时,调速范围较窄。针对上述问题,提出一种飞跨电容开绕组FMPML电机的单位功率因数弱磁控制策略。通过单位功率因数调制策略,解耦电机运行所需有功功率、无功功率,降低电源逆变器无功压力,使之运行于单位功率因数。结合反馈弱磁控制策略扩展控制系统调速范围。通过仿真与实验验证所提控制策略的有效性。

关键词：功率因数弱磁控制磁场调制永磁电机直线电机开绕组

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

一种基于LPTV的开关电容模拟信息转换器设计

引用

电子测量与仪器学报 2020年第5期32卷 165-173页

作者：宋欣欣钱慧福州大学数字福建物联网工程应用重点实验室福州350000

模拟信息转换器(analog-to-information converter,AIC)以低于Nyquist率的采样率成为下一代模拟数字转换器的核心技术。模拟信息转换器采用随机解调模块处理输入数据,系统存在典型的时变特性,从而导致理论模型与实际电路模型失配。针对... 详细信息

模拟信息转换器(analog-to-information converter,AIC)以低于Nyquist率的采样率成为下一代模拟数字转换器的核心技术。模拟信息转换器采用随机解调模块处理输入数据,系统存在典型的时变特性,从而导致理论模型与实际电路模型失配。针对该问题,以开关电容作为AIC的核心部件,利用线性周期时变(linear periodically time-variant,LPTV)理论将周期时变的AIC系统转换为线性时不变系统,推导其系统传输函数,从而建立了AIC理论模型的电路设计方法。实验证明,该电路设计方法使理论的系统传输函数与实际电路的系统传输函数很好的匹配,充分验证了该设计方案的有效性。重构结果表明该电路可以将采样速率降低到原有奈奎斯特率的25%,重构信号的信噪比最高可达39.7 dB。

关键词：压缩感知模拟信息转换器亚奈奎斯特采样随机解调电路线性周期时变

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：