检索结果-南通市图书馆

Differentially expressed miRNAs in premature infants with retinopathy-a bioinformatics analysis

在线全文

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2018年第5期11卷 773-779页

作者： Yang Yang Jing-Jing Pan xiao-guang zhou xiao-Yu zhou Rui Cheng Department of Neonatology Children's Hospital Affiliated to Nanjing Medical University Department of Neonatology Jiangsu Provincial People's Hospital Affiliated to Nanjing Medical University

AIM：To reveal the role of miRNA in retinopathy of prematurity（ROP） by bioinformatics ***：The raw data of this study came from the researches of Wang et al and Zhao et al who analyzed the micro RNA（mi RNA） expression profile between ROP and *** on the identified differentially expressed miRNA,the related target genes,lnc RNA and circ RNA were *** we performed functional enrichment analysis to further analyze the functions of target ***：Hsa-mi RNA-128-3 p and hsa-mi RNA-9-5 p showed significantly different expression in both *** RNA of POLDIP2,GAS5,NEFL and UHRF1,circ RNA of ZNF280 C_hsa_circ_001211 and SIAE_hsa_circ_002083,tar get gene of QKI showed meaningful differential expression in *** analysis showed that TGF-β signaling pathway,PI3 K-Akt signaling pathway and MAPK signaling pathway might play important roles in the prog ress of ***：This research may provide a comprehensive bioinformatics analysis of differentially expressed miR NAs which are possibly involved in ROP.

关键词： bioinformatics microRNA retinopathy of prematurity

Optimal design of hot rolling process for C-Mn steel by combining industrial data-driven model and multi-objective optimization algorithm

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

Journal of Iron and Steel Research International 2018年第7期25卷 700-705页

作者： Si-wei Wu xiao-guang zhou Jia-kuang Ren guang-ming Cao Zhen-yu Liu Nai-an Shi State Key Laboratory of Rolling and Automation Northeastern University Shenyang 110819 Liaoning China Continuous Rolling Plant of No. 3 Steelmaking of Angang Co. Ltd. Anshan 114021 Liaoning China

A successful mechanical property data-driven prediction model is the core of the optimal design of hot rolling process for hot-rolled strips. However, the original industrial data, usually unbalanced, are inevitably mixed with fluctuant and abnormal values. Models established on the basis of the data without data processing can cause misleading results, which cannot be used for the optimal design of hot rolling process. Thus, a method of industrial data processing of C-Mn steel was proposed based on the data analysis. The Bayesian neural network was employed to establish the reliable mechanical property prediction models for the optimal design of hot rolling process. By using the multi-objective optimization algorithm and considering the individual requirements of costumers and the constraints of the equipment, the optimal design of hot rolling process was successfully applied to the rolling process design for Q345B steel with 0.017% Nb and 0.046% Ti content removed. The optimal process design results were in good agreement with the industrial trials results, which verify the effectiveness of the optimal design of hot rolling process.

关键词： Industrial data Data processing - Mechanical property Optimal design Hot rolling process C-Mn steel

Upgrade Rolling Based on Ultra Fast Cooling Technology for C-Mn Steel

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

Journal of Iron and Steel Research International 2014年第1期21卷 86-90页

作者： xiao-guang zhou Zhen-yu LIU Sheng-yong SONG Di WU Guo-dong WANG State Key Laboratory of Rolling and Automation Northeastern University

By measuring the expansion curves of a C-Mn steel at different cooling rates by using an MMS-300 thermo- mechanical simulator, continuous cooling transformation curves were obtained. The new process ＂ultra fast cooling＋ laminar cooling＂ was simulated and the effects of ultra fast cooling ending temperature on microstructure had also been investigated. The hot rolling experiment was done by adopting ＂high temperature rolling-[-forepart ultra fast cooling＂ technologies at laboratory scale. The results revealed that ultra fast cooling can delay the decrease of disloca- tion density and refine ferrite grains. Diversity control of the microstructure and phase transformation strengthening can be realized by changing the ultra fast cooling ending temperature. With the decrease of ultra fast cooling ending temperature, the strength and toughness increase, but plasticity does not decrease obviously. The new technique can improve the yield strength by over 50 MPa. Therefore, the upgrade of mechanical properties of C-Mn steel can be realized by using ＂high temperature rolling＋ ultra fast cooling＋laminar cooling＂ technique. Compared with ＂low temperature rolling with large deformation degree＂ technique, this new technology can decrease the roiling force and in- crease the production efficiency.

关键词： ultra fast cooling C-Mn steel grain refinement strengthening phase transformation strengthening grain size

Treatment of infant postrenal acute renal failure followingobstruction due to upper urinary calculi

在线全文

学校读者我要写书评

暂无评论

Frontiers of Medicine 2010年第1期4卷 127-130页

作者： Hui-Xia zhou Zhi-Chun FENG Hao MENG xiao-guang zhou Shuang LI Jun WANG Shi-Xi DAI Department of Urology Bayi Children’s HospitalGeneral Hospital of Beijing Military RegionBeijing 100700China Department of Urology Wuhan Children’s HospitalWuhan 430030China

The surgical emergency treatments and cura-tive effects of postrenal acute renal failure following obstruction due to upper urinary calculi in infants were *** the 13 infants with postrenal acute renal failure following obstruction due to upper urinary calculi,11 received retrograded catheterizations of the ureter with semi-rigid ureteroscopy(F 6.8),and two received open *** results showed that only one infant had anuresis and continuous reduction of hemoglobin 5 h after the open ureterolithotomy and received exploration via excision and peritoneal dialysis,and the remaining 12 patients well recovered in this *** renal function of all the patients was restored without postoperative *** is concluded that the retrograded catheterization of the ureter with ureteroscopy is a minimally invasive,safe and effective therapy for postrenal acute renal failure following obstruction due to upper urinary calculi in *** those infants whose urethras are thin and small,the open ureterolithotomy is a suitable *** patients with bleeding tendency need to be corrected prior to the open ureterotomy to remove obstructions.

关键词： infant acute renal failure postrenal uretero-scopy

Synthesis and Characterization of ChiralLiquid Crystal CMPPCDP

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

Chemical Research in Chinese Universities 1994年第3期10卷 202-205页

作者： TIAN Yan-qing , ZHAO Ying-ying, SU Feng-yu and TANG Xin-yi(Department of Chemistry,Jilin University,Changchun,130023)ZHAO xiao-guang and zhou En-le(Changcnun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun,130022 )

novel chiral liquid crystal4'-( 2-chloro-4methylpentanoyloxy ) phenyl 2-cyano-3-(4' -n-dodecyloxyphenyl)propenoate (CMPPCDP ) was synthesized. The compound was characterized usingIR, ￣1H NNIR, elementary analysis. The liquid crystalline pliasc transition wasstudied using optical polarized micrography and differential scanning calorimetry.

关键词： Liquid crystal Smectic liquid crystal S-1-chloro-4-methyl pentanoiciacid ester

多连杆机械臂GA-RBF神经网络轨迹跟踪控制

在线全文

学校读者我要写书评

暂无评论

机械科学与技术 2018年第5期37卷 669-674页

作者：肖凡李光周鑫林湖南工业大学机械工程学院湖南株洲412007

针对多连杆机械臂模型系统信息不完整、存在外界干扰等问题,设计了一种新型的GA-RBF神经网络闭环自适应控制系统。该系统利用径向基函数(RBF)神经网络来逼近并补偿系统的模型误差和外界扰动,在基于计算力矩法的基础上实现对机械臂的轨... 详细信息

针对多连杆机械臂模型系统信息不完整、存在外界干扰等问题,设计了一种新型的GA-RBF神经网络闭环自适应控制系统。该系统利用径向基函数(RBF)神经网络来逼近并补偿系统的模型误差和外界扰动,在基于计算力矩法的基础上实现对机械臂的轨迹跟踪控制,并采用遗传算法(GA)对RBF神经网络权值进行在线优化,确保机械臂控制系统能在更短时间内获得稳定,实现了高精度的轨迹跟踪,提高了轨迹跟踪的性能。MATLAB数值仿真的结果验证了该方法的有效性。

关键词：计算力矩法 RBF神经网络遗传算法机械臂轨迹跟踪 MATLAB

Synthesis and Phase Behavior Studies of Two New Chiral Liquid Crystals of Schiff Base——The Influence of Intramolecular Hydrogen Bond on the Phase Behavior

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 1995年第2期11卷 145-149页

作者： TIAN Yan-qing,XING Pei-xiang,ZHAO Ying-ying and TANG Xin-yi (Department of Chemistry,Jilin University,Changchun,130023)SU Feng-yu,ZHAO xiao-guang and zhou En-le (Changchun Institute of Applied Chemistry,Chinese Academy of Science,Changchun,130022)

Two new chiral liquid crystals of schiff-base type have been *** series of compounds contain α-chloro acidic ester chain prepared from commercially available *** of the compounds exhibit tilted smectic phases;their phase transitions were studied using DSC and polarized optical microscopy;the influence of intramolecular hydrogen bonds on the phase behavior was studied as well.

关键词： Chiral liquid crystals Schiff base Synthesis

Tuning the interfacial reaction environment via pH-dependent and induced ions to understand C–N bonds coupling performance in NO3- integrated CO2 reduction to carbon and nitrogen compounds over dual Cu-based N-doped carbon catalyst

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 273-285页

作者： Tianhang zhou Chen Shen Zhenghao Wu Xingying Lan Yi xiao College of Carbon Neutrality Future Technology State Key Laboratory of Heavy Oil Processing China University of Petroleum (Beijing) Institute of Materials Science TU Darmstadt Department of Chemistry Xi'an Jiaotong-Liverpool University Department of Mechanical and Mechatronics Engineering and Waterloo Institute of Nanotechnology University of Waterloo Waterloo

Dual atomic catalysts （DAC）,particularly copper （Cu2）-based nitrogen （N） doped graphene,show great potential to effectively convert CO2and nitrate （NO3-） into important industrial chemicals such as ethylene,glycol,acetamide,and urea through an efficient catalytical process that involves C–C and C–N ***,the origin of the coupling activity remained unclear,which substantially hinders the rational design of Cu-based catalysts for the N-integrated CO2reduction reaction （CO2RR）.To address this challenge,this work performed advanced density functional theory calculations incorporating explicit solvation based on a Cu2-based N-doped carbon (Cu2N6C10) catalyst for *** calculations are aimed to gain insight into the reaction mechanisms for the synthesis of ethylene,acetamide,and urea via coupling in the interfacial reaction *** to the sluggishness of CO2,the formation of a solvation electric layer by anions （F-,Cl-,Br-,and I-） and cations (Na+,Mg2+,K+,and Ca2+) leads to electron transfer towards the Cu *** process significantly accelerates the reduction of *** results reveal that*CO intermediates play a pivotal role in N-integrated ***,the Cu2-based N-doped carbon catalyst examined in this study has demonstrated the most potential for C–N coupling to *** findings reveal that through the process of a condensation reaction between*CO and NH2OH for urea synthesis,*NO3-is reduced to*NH3,and*CO2to*CCO at dual Cu atom *** dual-site reduction facilitates the synthesis of acetamide through a nucleophilic reaction between NH3and the ketene ***,we found that the I-and Mg2+ions,influenced by pH,were highly effective for acetamide and ammonia synthesis,except when F-and Ca2+were ***,the mechanisms of C–N bond formation were investigated via ab-initio molecular dynamics simulations,and we found that adjusting the micro-environment can change the dominant side reaction,shift

关键词： Condensation reactions

铁磁/正常/铁磁结调制的拓扑绝缘体薄膜表面输运性质（英文）

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

湖南师范大学自然科学学报 2016年第6期39卷 61-67页

作者：刘宇周小英周光辉湖南第一师范学院信息科学与工程学院中国长沙410205 湖南师范大学物理与信息科学学院中国长沙410081

研究了拓扑绝缘体薄膜表面态在铁磁/正常/铁磁结调制下的电子自旋相关输运.发现由于交换场与杂化带隙的竞争而产生量子相变,在结无门电压时电导行为类似于自旋阀,加门电压后为自旋场效应管.有趣的是,无门电压且交换场能是杂化带隙的两... 详细信息

研究了拓扑绝缘体薄膜表面态在铁磁/正常/铁磁结调制下的电子自旋相关输运.发现由于交换场与杂化带隙的竞争而产生量子相变,在结无门电压时电导行为类似于自旋阀,加门电压后为自旋场效应管.有趣的是,无门电压且交换场能是杂化带隙的两倍时出现一个电导平台,磁阻比率可达100%.

关键词：拓扑绝缘体薄膜铁磁/正常/铁磁结表面态输运