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Extension formulae on almost complex manifolds

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Science China Mathematics 2021年第1期64卷 45-80页

作者： Jixiang Fu haisheng liu Institute of Mathematics Fudan UniversityShanghai200433China School of Mathematical Sciences Fudan UniversityShanghai200433China

We give the extension formulae on almost complex manifolds and give decompositions of the extension *** applications,we study(n,0)-forms,the(n,0)-Dolbeault cohomology group and(n,q)-forms on almost complex manifolds.

关键词： deformations of special structures almost complex structures deformations and infinitesimal methods formal methods deformations

Natural thermoluminescence of fossil foraminiferals as a potential proxy for deep-sea temperature changes

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Acta Oceanologica Sinica 2008年第2期27卷 30-34页

作者： liu haisheng FANG Nianqiao HOU Shengli CHEN Yexun Institute of Nuclear and New Energy Technology Tsinghua University Beijing 100084 China China University of Geosciences Beijing 100083 China

Foraminiferal shells from two piston cores separately located at the Ninetyeast Ridge and the Bengal Fan of the Indian Ocean were selected and purified for measurements of natural thermoluminescence （NTL） intensity by a high precision thermoluminescence meter （RGD-3）. Variations of the NTL intensity along the two core sequences both spanning the last two glacial--interglacial cycles displayed a strong, identical signal of the global ice volume cycles, which matched well with their corresponding oxygen isotope data. As higher NTL intensity occurred within interglacial periods and changes in an NTL signal were most likely influenced by the temperature of ambient seawater in which the planktonic foraminiferal shells long existed, the NTL signal could be considered as a potential proxy for orbital scale temperature changes of bottom seawater in the tropical Indian Ocean.

关键词： natural thermoluminescence foraminiferal glacial--interglacial cycle northeastern Indian Ocean

Improved greenhouse cucumber production under deficit water and fertilization in Northern China

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International Journal of Agricultural and Biological Engineering 2018年第4期11卷 58-64页

作者： Shaikh Abdullah Al Mamun Hossain Lixue Wang haisheng liu College of Water Conservancy Shenyang Agricultural UniversityShenyang 110866LiaoningChina Department of Agricultural Engineering Patuakhali Science and Technology UniversityDumkiPatuakhali 8602Bangladesh

The objective of this study was to investigate the effects of different water and fertilizer applications on biomass,yield and fruit physical quality of greenhouse cucumber under drip *** experiment was conducted at Water Conservancy Research Institute,Shenbei District,Shenyang,Northern China during February-July,*** treatments were used in randomized block design consisted of three levels of water field capacity(FC)and urea-potash(N-K)fertilizer combinations:W1(65%of FC),W_(2)(75%of FC),W3(85%of FC)and N_(1)-K_(1)(285-305 kg/hm^(2)),N2-K2(420-435 kg/hm^(2)),N_(3)-K_(3)(530-565 kg/hm^(2)).Local farmers’conventional application of water(100%)and fertilizer(NPK)was considered as check(CK)for *** obtained was analyzed(ANOVA)to check the significant effect of *** results revealed that,treatment W_(3)N_(2)K_(1) obtained highest cucumber yield of 129.99 t/hm^(2),while W_(1)N_(1)K_(1) recorded the lowest yield(113.29 t/hm^(2)),in which total amount of seasonal water applied ranges from 85.3 mm to 172.36 *** highest yield was obtained 0.5%greater than the CK yield(129.35 t/hm^(2)).The water and fertilizer application was significantly(p<0.001)influenced on cucumber ***,the influence of water application was significantly(0.01

关键词： cucumber drip irrigation fertilizer greenhouse yield

Analysis of the Flow Field and Impact Force in High-Pressure Water Descaling

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Fluid Dynamics & Materials Processing 2024年第1期20卷 165-177页

作者： Yue Cui Liyuan Wang Jian Wu haisheng liu Di Wu Key Lab of Intelligent Equipment Digital Design and Process Simulation Hebei ProvinceTangshan UniversityTangshan063000China Department of Intelligent Manufacturing Tangshan Vocational College of Science and TechnologyTangshan063001China

This study aims to improve the performances of the high-pressure water descaling technology used in steel hot rolling *** particular,a 2050 mm hot rolling line is considered,and the problem is investigated by means of a fluid–structure interaction(FSI)method by which the descaling effect produced by rolling coils with different section sizes is *** a flat fan-shaped nozzle at the entrance of the R1R2 roughing mill,the outflow field characteristics and the velocity distribution curve on the strike line(at a target distance of 30–120 mm)are *** is found that the velocity in the center region of the water jet with different target distances is higher than that in the boundary *** the target distance increases,the velocity of the water jet in the central region *** comparison with experimental results,it is shown that the simulation model can accurately predict the impact position of the high-pressure water on the impact plate,thereby providing a computational scheme that can be used to optimize the nozzle space layout and improve the slabs’descent effect for different rolling specifications.

关键词： High pressure water descaling flow field analysis FSI target distance strike range

A rapid method for the detection of humic acid based on the poly(thymine)-templated copper nanoparticles

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Chinese Chemical Letters 2018年第1期29卷 136-138页

作者： Changbei Ma Mingjian Chen haisheng liu Kefeng Wu Hailun He Kemin Wang State Key Laboratory of Medical Genetics & School of Life Sciences Central South University State Key Laboratory of Chemo/Biosensing and Chemometrics Hunan University

This work described a new method for the detection of humic acid （HA） based on the poly（thymine）（polyT）-templated copper nanoparticles （CuNPs）. Without the presence of HA, the formation of poly T- templated CuNPs could take place, resulting in strong fluorescence emission peaks at 610 nm （upon excitation at 340 nm）. On the other hand, when HA was present, strong interaction between HA and Cu2＋ took place, which then hampered the effective formation of fluorescent CuNPs, leading to the decrease in fluorescence intensity. Furthermore, under the optimal experimental conditions, the method exhibited a high specificity to HA with a detection limit of 0.4 mg/L. This work has demonstrated a low-cost and convenient method that could be accomplished within 10 min. The method could provide a simple, rapid, and sensitive fluorescent olatform for the detection of HA.

关键词： Label-freeHumic acidFluorescenceCopper nanoparticleCost-effective

Olfactory route for cerebrospinal fluid drainage into the cervical lymphatic system in a rabbit experimental model

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Neural Regeneration Research 2012年第10期7卷 766-771页

作者： haisheng liu Zhili Ni Yetao Chen Dong Wang Yan Qi Qiuhang Zhang Shijie Wang Department of Neurosurgery Yuquan Hospital Tsinghua University Beijing 100049 China Department of Otorhinolaryngology and Head ＆ Neck Surgery Xuanwu Hospital Capital Medical University Beijing 100053 China

The present study analyzed the anatomical association between intracranial subarachnoid space and the cervical lymphatic system. X-ray contrast medium and Microfil （Microfil compounds fill and opacify microvascular and other spaces of non-surviving animals and post-mortem tissue under physiological injection pressure） were injected into the cisterna magna of the rabbit, and perineural routes of cerebrospinal fluid outflow into the lymphatic system were visualized. Under a surgical operating microscope, Microfil was found within the subarachnoid space and along the olfactory nerves. At the nasal mucosa, a lymphatic network was identified near the olfactory nerves, which crossed the nasopharyngeal region and finally emptied into the superficial and deep cervical lymph nodes. Under a light microscope, Microfil was visible around the olfactory nerves and within lymphatic vessels. These results suggested that cerebrospinal fluid drained from the subarachnoid space along the olfactory nerves to nasal lymphatic vessels, which in turn, emptied into the cervical lymph nodes. This anatomical route, therefore, allowed connection between the central nervous system and the lymphatic system.

关键词： central nervous system cerebrospinal fluid lymph subarachnoid space

Study on chemical forms of fluorine enrichment of Antarctic krill

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Acta Oceanologica Sinica 2000年第4期19卷 63-71页

作者： Pan Jianming, Zhang haisheng, liu Xiaoya (Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China) Second Institute of Oceanography State Oceanic Administration Hangzhou 310012 China

The different forms fluoine in different parts of molting process of krill was analyzed by culture of Antarctic krill (Euphausia superba). The results shaw that fluorine amount in cuticle is up to 90% of total in the krill. During the krill molting process, the fluorine content in cuticle and muscle varies alternatively. This is to say, the fluorine content in new cuticle and muscle is much lower after molted, the fluorine in krill comes from seawater by biological absorption of the krill, and the fluorine absorbed by krill lost with the old cuticle at the end stage of molting process. Meanwhile, the new molting process starts again. The evidence is proved by the change of different forms fluorine content in cuticle and muscle during krill's molting process. At last the author proposes the fluorine enriching process model of Antarctic krill.

关键词： Antarctic krill fluorine enrichment chemical forms

Research on Adaptive Robust Control of Electro-hydraulic Composite Cylinder Under Complex Load Conditions

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Research on Adaptive Robust Control of Electro-hydraulic Com...

Molecular hexagram and octagram:Position determined 3D metallo-supermolecules and concentration-induced transformation

第32届中国控制与决策会议

作者： haisheng liu Wei Shen Beijing Institute of Technology School of Automation

With the rapid development of industrial automation,high-precision modeling and motion control of linear motion actuators have become very important in practical engineering ***,the conventional linear motion actuators such as electric cylinders are difficult to achieve good control effects under complex load *** order to solve this control problem,this paper adopts the Electro-hydraulic composite cylinder,a new type of integrated actuator as the controlled object and designs a control scheme for electro-hydraulic hybrid drive *** electric part of the composite cylinder is actively controlled,and an adaptive robust controller with continuous friction compensation is *** the same time,the robust integral of the sign of the error（RISE） is introduced in the controller to compensate for the approximate error and the bounded *** hydraulic part assists and produces a load balancing force through the combination of the hydraulic cylinder and the accumulator to attenuate the effects of complex load conditions on the entire controlled *** Simulation results demonstrate the effectiveness of the proposed control method.

关键词： Electro-hydraulic Composite Cylinder Hybrid Drive Adaptive Robust Control Complex Load Conditions

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Chinese Chemical Letters 2021年第6期32卷 1911-1914页

作者： Tun Wu Zhiyuan Jiang Xiaobo Xue Shi-Cheng Wang Mingzhao Chen Jun Wang haisheng liu Jun Yan Yi-Tsu Chan Pingshan Wang Institute of Environmental Research at Greater Bay Area Key Laboratory for Water Quality and Conservation of the Pearl River DeltaMinistry of EducationGuangzhou UniversityGuangzhou 510006China Department of Organic and Polymer Chemistry College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083China Department of Chemistry National Taiwan UniversityTaipei 10617

The reaction of a metallo-organic ligand(LA)in which two"V"-shaped bisterpyridines attaching to metaposition of"X"-shaped tetraterpyridine via connectivity and Zn^(2+)ions gave rise to 3D supramolecular architectures:octagram(Zn_(8)LA_(4)).However,a position varied ligand(LB)in which two"V"-shaped bisterpyridines locating at the ortho-position of"X"-shaped tetraterpyridine afforded a different 3D hexagram(Zn_(6)LB_(3)).Full characterizations included NMR(^(1)H,^(13)C,^(2)D COSY,NOESY and DOSY),ESI-MS,TWIM-MS,TEM and *** resulted structures were directly determined by the position of two"V"-shaped bisterpyridines attaching to"X"-shaped tetraterpyridine.

关键词： Self-assembly Terpyridine Supramolecular transformation Metal-organic ligand Metalla-cage