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neuroscience Bulletin 2015年第3期31卷 371-378页

作者： Lei zhang Yan zhang State Key Laboratory of Biomembrane and Membrane Biotechnology College of Life Sciences PKU-IDG/Mc Govern Institute for Brain Research Peking University

The tunneling nanotube （TnT） is a newly discovered, long and thin tubular structure between cells. In this study, we established a co-culture system for rat primary astrocytes and C6 glioma cells and found that TnTs formed between them. Most of the TnTs initiated from astrocytes towards C6 glioma cells. The formation of TnTs depended on p53. In addition, hydrogen peroxide increased the number of TnTs in the co-culture system. Established TnTs reduced the proliferation of C6 glioma cells. Our data suggest that TnTs between astrocytes and glioma cells facilitate substance transfer and therefore alter the properties, including the proliferation potential, of glioma cells.

关键词： tunneling nanotube astrocyte glioma proliferation p53

Constructing entire functions with non-locally connected julia set by quasiconformal surgery

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Science China Mathematics 2018年第9期61卷 1637-1646页

作者： Yanhua zhang Gaofei zhang Department of Mathematics Qufu Normal University Department of Mathematics Nanjing University

We give an alternative way to construct an entire function with quasiconformal surgery so that all its Fatou components are quasi-disks but the julia set is non-locally connected.

关键词： entire functions quasiconformal surgery non-locally connected julia sets

Air-blast anti-fouling cleaning for aquatic optical sensors

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International journal of Agricultural and Biological Engineering 2015年第6期8卷 128-135,I0003页

作者： zhang Yali naiqian zhang College of Engineering Key Laboratory of Key Technology on Agricultural Machine and EquipmentSouth China Agricultural UniversityGuangzhou 510642China Department of Biological and Agricultural Engineering College of EngineeringKansas State UniversityManhattanKS 66506USA

In order to solve the problem of fouling of submerged optical instruments,an air-blast cleaning mechanism was integrated into an optical sensor used for measuring suspended sediment concentration(SSC)in natural *** experiments in a manually created fouling environment were conducted to observe the fouling process on sensor cases made of different materials,and to verify the effectiveness of air-blast cleaning in reducing *** indicated that sensors with an aluminum case experienced more serious bio-fouling than that with polyethylene case,and the air-blast cleaning mechanism was capable of reducing fouling effect on sensor *** the submerged optical instruments should avoid using metal *** duration and frequency of air-blast cleaning can be determined and adjusted depending on actual field conditions.

关键词： optical sensor aquatic sensor anti-fouling bio-fouling air-blast cleaning sediment

Methods for wave equation prestack depth migration and numerical experiments

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Science China Mathematics 2004年第Z1期47卷 111-120页

作者： zhang Guanquan zhang Wensheng Institute of Computational Mathematics and Scientific/Engineering Computing Academy of Mathematics and System Sciences Chinese Academy of Sciences Beijing 100080 China Institute of Computational Mathematics and Scientific/Engineering Computing Academy of Mathematics and System Sciences Chinese Academy of Sciences Beijing 100080 China

In this paper the methods of wave theory based prestack depth migration and their implementation are studied. Using the splitting of wave operator, the wavefield extrapolation equations are deduced and the numerical schemes are presented. The numerical tests for SEG/EAEG model with MPI are performed on the PC-cluster. The numerical results show that the methods of single-shot (common-shot) migration and synthesized-shot migration are of practical values and can be applied to field data processing of 3D prestack depth migration.

关键词： wave operator splitting, 3D prestack depth migration, SEG/EAEG model, synthesized-shot, finite-difference method, factorization method, hybrid method, MPI.

平等权保障视角下灵活就业人员社会保险问题研究

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河南财经政法大学学报 2025年第1期40卷 60-73页

作者：张荣芳武汉大学法学院湖北武汉430072

平等权作为公民的基本权利,同样适用于社会保险给付领域。无论从社会保障权的实现还是社会保险制度的法理基础来看,现行制度排斥灵活就业人员进入工伤保险和失业保险体系的做法均违反平等权保障要求;灵活就业人员在职工基本养老保险和... 详细信息

平等权作为公民的基本权利,同样适用于社会保险给付领域。无论从社会保障权的实现还是社会保险制度的法理基础来看,现行制度排斥灵活就业人员进入工伤保险和失业保险体系的做法均违反平等权保障要求;灵活就业人员在职工基本养老保险和基本医疗保险中的差别待遇,既不符合社会保险的属性,亦无上位法依据,且与国家的大政方针相悖。因此,亟须调整现行职工社会保险制度,将灵活就业人员纳入工伤保险体系;规定其享受职工基本养老保险的年龄与职工相同,建立“多缴费、长缴费”的保费与待遇挂钩激励机制;废除灵活就业人员享受职工基本医保待遇等待期的相关规定;逐步建立与其就业特点相适应的失业保障制度,促进多种灵活就业方式健康发展。

关键词：灵活就业人员社会保险平等权待遇保障

Robust H∞ Control Based on Dynamic Compensation for Rectangular Descriptor Systems

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Robust H∞ Control Based on Dynamic Compensation for Rectang...

Influence of aging on microstructure,mechanical properties and stress corrosion cracking of 7136 aluminum alloy

第三十九届中国控制会议

作者： Wugui Wang He zhang Zhe zhang j.ng long China Ship Development and Design Center Hubei Electric Power Equipment CO. Ltd.

In this paper, robust H

关键词： Rectangular descriptor system parameter uncertainty dynamic compensator robust H∞ control bilinear matrix inequality(BMI)

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journal of Central South University 2021年第9期28卷 2687-2700页

作者： WEI Shi-long FEnG Yan zhang Hui XU Chun-ting WU Ying School of Materials Science and Engineering Central South UniversityChangsha 410083China Key Laboratory of Electronic Packaging and Advanced Functional Materials Changsha 410083China The 38 th Institute of China Electronics Technology Group Corporation Hefei 230088China

The microstructure,mechanical properties and stress corrosion cracking(SCC)of 7136 aluminum alloy under T 6,T 79 and T 74 aging treatments were studied and the effects of microstructure on the mechanical properties and SCC were *** results show that the ultimate tensile strength and yield strength of the aging 7136 alloys follow this sequence from high to low:T 6>T 79>pre-aging>T *** 7136 Al alloy after T 6 aging,the average diameter of the precipitates was(5.7±1.7)nm,and the diameter of 60.7%(number fraction)precipitates was 2−6 nm,leading to a good precipitation *** K_(IC)of T 74-aging alloy is 38.2 MPa·m^(1/2),which is 26.1%more than that of T 6-aging alloy and 17.5%more than that of T 79-aging *** improved fracture toughness in T 74-aging alloy is mainly due to the reduction of the strength difference between intragranular and grain *** SCC resistance of the aging 7136 alloys follows this sequence from high to low:T 79>T 74>T *** T 79 aging,the discontinuous grain boundary precipitates and narrow precipitate free zones were obtained in 7136 alloy,which was beneficial to SCC resistance.

关键词： 7 xxx Al alloys stress corrosion cracking fracture toughness precipitate

Amides,Isoquinoline Alkaloids and Dipeptides from the Aerial Parts of Piper mullesua

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natural Products and Bioprospecting 2018年第6期8卷 419-430页

作者： Meng-Yuan Xia j.n Yang Pan-Hua zhang Xiao-nian Li ji-Feng Luo Chun-Lin long Yue-Hu Wang Key Laboratory of Economic Plants and Biotechnology and the Yunnan Key Laboratory for Wild Plant Resources Kunming Institute of BotanyChinese Academy of SciencesKunming 650201People’s Republic of China Southeast Asia Biodiversity Research Institute Chinese Academy of SciencesYezinNay Pyi Taw 05282Myanmar State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of BotanyChinese Academy of SciencesKunming 650201People’s Republic of China College of Life and Environmental Sciences Minzu University of ChinaBeijing 100081People’s Republic of China Key Laboratory of Ethnomedicine(Minzu University of China) Ministry of EducationBeijing 100081People’s Republic of China

One undescribedamide,pipermullesine A,twoundescribed isoquinoline alkaloids,pipermullesinesBand C,and six undescribed dipeptides,pipermullamides A–F,along with 28 known compounds,were isolated from the aerial parts of Piper *** structures of the undescribed compounds were elucidated based on the analysis of 1D and 2D nMR and MS ***,the structures of pipermullesines A–Cwere confirmed by single crystal X-ray diffraction *** isolates were evaluated for inhibitory activity against platelet aggregation induced by thrombin(IIa)or platelet-activating factor(PAF).(-)-Mangochinine,pellitorine,and(2E,4E)-n-isobutyl-2,4-dodecadienamide showed weak inhibitory activity against rabbit platelet aggregation induced by PAF,with IC_(50)values of 470.3μg/mL,614.9μg/mL,and 579.7μg/mL,respectively.

关键词： Piper mullesua Piperaceae Antiplatelet Amides Isoquinoline alkaloids

Modeling co-seismic thermal infrared brightness anomalies in petroliferous basins surrounding the north and East of the Qinghai–Tibet Plateau

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Earth and Planetary Physics 2020年第3期4卷 296-307页

作者： Xin zhang LiFeng zhang Key Laboratory of Earthquake Monitoring and Disaster Reduction Technology Guangdong Earthquake AgencyGuangzhou 510070China Qinghai Earthquake Agency Xining 810001China

Co-seismic gas leakage usually occurs on the edge of seismic faults in petroliferous basins,and it may have an impact on the local environment,such as the greenhouse effect,which can cause thermal infrared brightness *** wavelet transform and power spectrum estimation methods,we processed brightness temperature data from the Chinese geostationary meteorological satellite FY-C/*** report similarities between the co-seismic thermal infrared brightness(CTIB)anomalies before,during and after earthquakes that occurred at the edges of the Sichuan,Tarim,Qaidam,and j.nggar basins surrounding the north and East of the Qinghai–Tibet Plateau in western ***,in each petroliferous basin,the area of a single CTIB anomaly accounted for 50%to 100%of the basin area,and the spatial distribution similarities in the CTIB anomalies existed before,during and after these *** better interpret the similarities,we developed a basin warming effect model based on geological structures and *** model suggests that in a petroliferous basin with a subsurface gas reservoir,gas leakage could strengthen with the increasing stress before,during,and even after an *** accumulation of these gases,such as the greenhouse gases CH4 and CO2,results in the CTIB *** addition,we conclude that the CTIB anomalies are strengthened by the high mountains(altitude^5000 m)around the basins and the basins’independent climatic *** work provides a new perspective from which to understand the CTIB anomalies in petroliferous basins surrounding the north and East of the Qinghai–Tibet Plateau.

关键词： co-seismic thermal infrared brightness(CTIB) relative power spectrum(RPS) gas leakage basin warming effect

伊犁四矿弱胶结软岩巷道围岩控制技术研究及应用

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煤炭技术 2025年第1期44卷 52-56页

作者：张官禹黄其文张斌伊犁新矿煤业有限责任公司新疆伊犁835000

以新疆伊犁四矿21113工作面为工程背景,通过理论分析、数值模拟以及现场实测等手段,围绕浅埋弱胶结软岩巷道破坏特征及控制技术展开了一系列研究,研究结果表明:伊犁四矿弱胶结软岩巷道围岩变形特点为自稳时间短、应力释放明显,泥岩遇水... 详细信息

以新疆伊犁四矿21113工作面为工程背景,通过理论分析、数值模拟以及现场实测等手段,围绕浅埋弱胶结软岩巷道破坏特征及控制技术展开了一系列研究,研究结果表明:伊犁四矿弱胶结软岩巷道围岩变形特点为自稳时间短、应力释放明显,泥岩遇水易软化、出现无征兆冒顶,岩体自重大、顶板出现下沉,支护结构受力不耦合、支护单元破坏等。根据围岩变形特点提出了对巷道围岩及时支护、喷浆封闭、拱形断面、加长支护的联合支护技术,经过现场工业性试验以及观测数据证明,该联合支护方案,能够很好地控制巷道变形,21113上顺槽巷道从开始回采到结束未出现瞬发变形、顶板切落、锚杆(索)断裂及钢带撕裂等情况,巷道变形及维护满足工作面顺槽的使用要求。可为伊犁矿区弱胶结软岩巷道支护设计和施工提供指导作用。

关键词：弱胶结软岩巷道支护联合支护控制技术