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Application of tensor CSAMT with high-power orthogonal signal sources in Jiama porphyry copper deposit,South Tibet

China Geology 2023年第1期6卷 37-49页

作者： Peng-liang Yu Ting Qu ri-zheng he Jian-li Liu Su-fen Wang Xiao-long Chen Shaanxi Geology and Mining Geophysical and Geoehemical Prospecting Team Co. Ltd.Xi’an 710043China Chinese Academy of Geological Sciences Beijing 100037China

The Jiama porphyry copper deposit in Tibet is one of the proven supergiant copper deposits in the Qinghai-Tibet Plateau at present,with the reserves of geological resources equivalent to nearly 20×10^(6) ***,it features wavy and steep terrain,leading to extremely difficult field operation and heavy *** study attempts to determine the effects of the tensor controlled-source audiomagnetotellurics(CSAMT)with high-power orthogonal signal sources(also referred to as the high-power tensor CSAMT)when it is applied to the deep geophysical exploration in plateaus with complex terrain and mining areas with strong *** test results show that the high current provided by the highpower tensor CSAMT not only greatly improved the signal-to-noise ratio but also guaranteed that effective signals were received in the case of a long transmitter-receiver ***,the tensor data better described the anisotropy of deep geologic *** addition,the tests also show that when the transmitting current reaches 60 A,it is still guaranteed that strong enough signals can be received in the case of the transmitter-receiver distance of about 25 km,sounding curves show no near field effect,and effective exploration depth can reach 3 *** 2D inversion results are roughly consistent with drilling results,indicating that the high-power tensor CSAMT can be used to achieve nearly actual characteristics of underground electrical ***,this method has great potential for application in deep geophysical exploration in plateaus and mining areas with complex terrain and strong interference,*** study not only serves as important guidance on the prospecting in the Qinghai-Tibet Plateau but also can be used as positive references for deep mineral exploration in other areas.

关键词： Jiama porphyry copper deposit Supergiant copper polymetallic deposit Tensor CSAMT of 150 kw High power 2D inversion Deep prospecting Mineral exploration engineering Xizang(Tibet)

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PtCu dendroframe octahedrons:Enhancing peroxidase-like activity and antibacterial efficiency through structural evolution

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Nano Research 2025年第1期18卷 100-106页

作者： ri Feng Jiuyi Hu Liangjun Wang Jiayu Xu Jiajia Li Zeeshan Ahmad Shaohui zheng Muhammad Farhan Farid Wenjing Liu Faisal Saleem Key Laboratory of Flexible Electronics(KLOFE) Institute of Advanced Materials(IAM)and School of Flexible Electronics(Future Technologies)Nanjing Tech UniversityNanjing 211816China

Nanozymes,which possess enzyme-like catalytic activity,are attractive alternatives to natural *** activity is largely dependent on the structure of the ***,challenges remain in optimizing the structure-activity *** work explores the synthesis and utilization of PtCu nanostructures(NSs),focusing on their peroxidase(POD)-like properties and their potential as antibacterial *** developed PtCu dendrites that transform into unique dendroframe octahedrons(DFOs)and subsequently stabilize into solid octahedrons with unusual growth *** intermediate DFO,showed higher POD-like activity in comparison to other shapes of PtCu *** DFOs also have the better ability to consume glutathione,thus enhancing their sterilization ***,we demonstrate the effectiveness of these PtCu DFOs as powerful antibacterial *** work provides valuable information on shape dependent activities of PtCu NSs in the field of biomedicine.

关键词： nanozymes antibacterials peroxidase PtCu dendroframe octahedrons dendrites

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国防科研投资体制的弊端及对策

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装备指挥技术学院学报 2004年第6期15卷 33-35页

作者：曹驭日何正斌国防科学技术大学人文与社会科学学院，湖南长沙410073

针对目前我国国防科研投资体制的现状,从国防科研经费的获取渠道、国防科研投资主体、国防科研投资体制、国防科研经费管理及项目评估机制等方面进行了相关经济分析;针对我国国防科研投资体制问题,提出了一些对策;为促进国防科研单位更... 详细信息

针对目前我国国防科研投资体制的现状,从国防科研经费的获取渠道、国防科研投资主体、国防科研投资体制、国防科研经费管理及项目评估机制等方面进行了相关经济分析;针对我国国防科研投资体制问题,提出了一些对策;为促进国防科研单位更好地降低成本,提高经济效益提供参考.

关键词：科研投资国防体制项目评估机制对策获取渠道中国科研经费管理弊端科研单位

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Comparative study of omeprazole, lansoprazole, pantoprazole and esomeprazole for symptom relief in patients with reflux esophagitis

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World Journal of Gastroenterology 2009年第8期15卷 990-995页

作者： ri-Nan zheng Hainan Medical College 31 Longhua Road Haikou 57102 Hainan Proince China

AIM: To clarify whether there is any difference in the symptom relief in patients with reflux esophagitis following the administration of four Proton pump inhibitors (PPIs). METHODS: Two hundred and seventy-four patients with erosive reflux esophagitis were randomized to receive 8 wk of 20 mg omeprazole (n = 68), 30 mg of lansoprazole (n = 69), 40 mg of pantoprazole (n = 69), 40 mg of esomeprazole (n = 68) once a day in the morning. Daily changes in heartburn and acid reflux symptoms in the first 7 d of administration were assessed using a six-point scale (0: none; 1: mild; 2: mild-moderate; 3: moderate; 4: moderate-severe; 5: severe). RESULTS: The mean heartburn score in patients treated with esomeprazole more rapidly decreased than those receiving other PPI. Complete resolution of heartburn was also more rapid in patients treated with esomeprazole for 5 d compared with omeprazole (P = 0.0018, P = 0.0098, P = 0.0027, P = 0.0137, P = 0.0069, respectively), lansoprazole (P = 0.0020, P = 0.0046, P = 0.0037, P = 0.0016, P = 0.0076, respectively), and pantoprazole (P = 0.0006, P = 0.0005, P = 0.0009, P = 0.0031, P = 0.0119, respectively). There were no significant differences between the four groups in the rate of endoscopic healing of reflux esophagitis at week 8. CONCLUSION: Esomeprazole may be more effective than omeprazole, lansoprazole, and pantoprazole for the rapid relief of heartburn symptoms and acid reflux symptoms in patients with reflux esophagitis.

关键词： Omeprazole Pantoprazole Lansoprazole Esomeprazole Reflux esophagitis Symptom relief

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Cretaceous basin evolution in northeast Asia:tectonic responses to the paleo-Pacific plate subduction

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National Science Review 2022年第1期9卷 144-161页

作者： Qing-Ren Meng Zhong-he Zhou ri-Xiang Zhu Yi-Gang Xu zheng-Tang Guo State Key Laboratory of Lithospheric Evolution Institute of Geology and Geophysics Chinese Academy of Sciences Innovation Academy for Earth Science Chinese Academy of Sciences College of Earth and Planetary Sciences University of Chinese Academy of Sciences Key Laboratory of Vertebrate Evolution and Human Origins Institute of Vertebrate Paleontology and Paleoanthropology Chinese Academy of Sciences State Key Laboratory of Isotope Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Key Laboratory of Cenozoic Geology and Environment Chinese Academy of Sciences

Cretaceous rift basin evolution was an important part of the tectonic history of northeast Asia in the late *** types of rift basins are identified—active,passive and wide rift basins—and they developed in different *** rift basins in the eastern North China craton are thought to be the consequence of crustal stretching and passive asthenospheric *** rift basins in the eastern Central Asian orogen are assumed to originate from gravitational collapse of the thickened and heated orogenic *** rift basins in the northern North China craton are attributed to uprising of asthenospheric materials along a lithospheric-scale tear *** tearing of the sub ducting paleo-Pacific plate is postulated and well explains the spatial distribution of different types of rift basins and the eastward shifting of magmatism in the northern North China *** Late Cretaceous witnessed a period of mild deformation and weak magmatism,which was possibly due to kinematic variation of the paleo-Pacific plate.

关键词： NE Asia Cretaceous rift basin volcanism paleo-Pacific plate

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Crystal Structure and Solution Behavior of a Novel Enantiopure helical Coordination Polymer Based on Binaphthyl-bisbipyridine Ligand

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Chemical Research in Chinese Universities 2010年第6期26卷 857-861页

作者： JIN ri-zhe BIAN zheng he Ya-bing GAO Lian-xun State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 P R. China Graduate School of Chinese Academy of Sciences Beijing 100049 P R. China

An enantiopure helical coordination polymer AgPF6·（R）-3 as crystalline solid was synthesized by the self-assembly of chiral binaphthyl-based ligand（R）-6,6＇-di[6-（2,2＇-bipyridyl）]-2,2＇-diethoxyl-1,1＇-binaphthalene [（R）-3] and Ag＋ *** single crystal structural analysis indicates that this polymer exhibits an infinite cylindric single-stranded M-helical structure with local Λ configuration at each tetrahedral metal ***,the extended structure is dissociated into some oligomeric fragments in *** 1H NMR spectra of complex AgPF6·（R）-3 show that the ligand possesses a good C2 symmetry,and the chemical shifts of the protons depend on the concentration and *** addition,there are rapid dynamic exchanges among some oligonuclear fragments in the solution of AgPF6·（R）-3.

关键词： helical structure Binapthyl Silver Chiral ligand Solution behaviour

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Exponential stability for impulsive Cohen-Grossberg neural networks with time-varying delays and distributed delays

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International Journal of Intelligent Computing and Cybernetics 2013年第2期6卷 144-157页

作者： Cheng-De zheng ri-Ming Sun School of Science Dalian Jiaotong UniversityDalianPeople’s Republic of Chinaand Zhanshan Wang School of Information Science and EngineeringNortheastern UniversityShenyangPeople’s Republic of China

Purpose–The purpose of this paper is to develop a methodology for the existence and global exponential stability of the unique equilibrium point of a class of impulsive Cohen-Grossberg neural ***/methodology/approach–The authors perform M-matrix theory and homeomorphism mapping principle to investigate a class of impulsive Cohen-Grossberg networks with time-varying delays and distributed *** approach builds on new sufficient criterion without strict conditions imposed on self-regulation ***–The authors’approach results in new sufficient criteria easy to verify but without the usual assumption that the activation functions are bounded and the time-varying delays are *** example shows the effectiveness and superiority of the obtained results over some previously known ***/value–The novelty of the proposed approach lies in removing the usual assumption that the activation functions are bounded and the time-varying delays are differentiable,and the use of M-matrix theory and homeomorphism mapping principle for the existence and global exponential stability of the unique equilibrium point of a class of impulsive Cohen-Grossberg neural networks.

关键词： Neural nets Stability(control theory) Equilibrium methods Cohen-Grossberg networks Impulse Distributed delays Exponential stability

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Chlorocholine chloride and paclobutrazol treatments promote carbohydrate accumulation in bulbs of Lilium Oriental hybrids 'Sorbonne'

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2012年第2期13卷 136-144页

作者： ri-ru zheng Yun WU Yi-ping XIA Department of Horticulture College of Agriculture and BiotechnologyZhejiang UniversityHangzhou 310029China College of Horticulture and Forestry Sciences Huazhong Agricultural UniversityWuhan 430070China

The present study was to test the hypothesis that the plant growth retardants chlorocholine chloride(CCC) and paclobutrazol(PBZ)could improve the carbohydrate accumulation in lily bulbs by enhancing photosynthetic capacity and changing endogenous *** of Lilium Oriental hybrids'Sorbonne'were treated with a foliar spray of CCC or PBZ(both at 300 mg/L)solution,at six weeks after planting(6 WAP).The morphological parameters,endogenous hormone contents(gibberellic acid(GA),abscisic acid(ABA),and indole-3-acetic acid(IAA)),and carbohydrate contents were measured from 6 to 18 WAP,at 2-week *** results showed that CCC increased the biomass of leaves and stems which might produce more photoassimilates available for transportation and ***,PBZ treatment suppressed vegetative growth and favored photoassimilate transportation into bulbs.A slight delay of bud and anthesis formation was observed in both treated *** and PBZ treatments substantially enhanced the sucrose contents in leaves probably due to the increase of chlorophyll *** with CCC or PBZ decreased GA but increased IAA contents in lily bulbs which might stimulate starch accumulation and formation of new *** experiment suggested that CCC or PBZ treatment is an effective method to promote carbohydrate accumulation in lily bulbs.

关键词： Carbohydrate Chlorocholine chloride Gibberellic acid Lilium Oriental hybrids 'Sorbonne' Paclobutrazol

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Polarization independent superconducting nanowire detector with high-detection efficiency

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Rare Metals 2015年第2期34卷 71-76页

作者： he-Yu Yin Han Cai ri-Sheng Cheng zheng Xu Zhen-Nan Jiang Jian-She Liu Tie-Fu Li Wei Chen Tsinghua National Laboratory for Information Science and Technology Department of Microelectronics and Nanoelectronics Tsinghua University Institute of Microelectronics Tsinghua University

The superconducting nanowire single photon detector（SNSPD） draws much attention because of its attractive performance at ultra violet, visible, and nearinfrared wavelengths, and it can be widespread in quantum information technologies. However, how to increase the absorption which can dramatically increase the quantum efficiency of the SNSPD is still a top research issue. In this study, the effect of incident medium and cavity material on the optical absorptance of cavity-integrated SNSPDs was systematically investigated using finite-element method. The simulation results demonstrate that for photons polarized parallel to nanowire orientation, even though the maximum absorptance of the nanowire is insensitive to cavity material,it does increase when the refractive index of incident medium decreases. For perpendicularly polarized photons, both incident medium and cavity material play significant roles,and the absorptance curves get closer to the parallel case as the refractive index of cavity material increases. Based on these results, two cavity-integrated SNSPDs with frontillumination structure which can enhance the absorptance for both parallel and perpendicular photons are ***, a design to realize polarization-independent SNSPDs with high absorptance is presented.

关键词： Polarization-independent Distributed Braggreflective High-detection efficiency Superconductingnanowire single photon detector

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Nonparametric Regression with Interval-Censored Data

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Acta Mathematica Sinica,English Series 2014年第8期30卷 1422-1434页

作者： Wen Li DENG Zu Kang zheng ri Quan ZHANG School of Mathematics and Information Science Jiangxi Normal University Department of Statistics School of ManagementFudan University Department of Statistics School of Finance and StatisticsEast China Normal University

In many medical studies,the prevalence of interval censored data is increasing due to periodic monitoring of the progression status of a *** nonparametric regression model,when the response variable is subjected to interval-censoring,the regression function could not be estimated by traditional methods *** the censored data,we construct a new response variable which has the same conditional expectation as the original *** on the new variable,we get a nearest neighbor estimator of the regression *** is established that the estimator has strong consistency and asymptotic *** relevant simulation reports are given.

关键词： Interval-censored data regression function nearest neighbor estimator

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