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水稻软盘毯状苗分离机设计与试验

农机化研究 2025年第2期47卷 86-90页

作者：赵语轩毛欣衣淑娟陶桂香田永久黑龙江八一农垦大学程学院黑龙江大庆163319 黑龙江省水稻生态育秧装置及全程机械化工程技术研究中心黑龙江大庆163319

目前,水稻种植环节中育秧环节与移栽环节之间的水稻苗盘分离环节的机械化程度相较于其他环节较为薄弱。为提高水稻全程机械化作业水平,降低生产成本,设计了一种适用于水稻毯状苗与塑料软盘分离的机械装置,主要由输送机构、分离机构、扶... 详细信息

目前,水稻种植环节中育秧环节与移栽环节之间的水稻苗盘分离环节的机械化程度相较于其他环节较为薄弱。为提高水稻全程机械化作业水平,降低生产成本,设计了一种适用于水稻毯状苗与塑料软盘分离的机械装置,主要由输送机构、分离机构、扶苗机构、集苗机构、动力系统和机架组成。对装置的结构及工作原理进行了描述,分析确定各个机构的结构参数。以分离率、茎叶损伤率、基质损伤率为试验指标进行苗盘分离试验,结果表明:水稻软盘毯状苗分离机作业效果较好,分离成功率在95%以上,能够降低生产成本,提高生产效率;茎叶损伤率及基质损伤率均在3%以下,保证后续水稻毯状苗移栽工作的顺利进行,较小的茎叶损伤与基质损伤也保证了后续水稻生长过程中不会受到较大的影响,满足水稻育秧农艺要求和水稻工厂化技术规范要求。

关键词：水稻毯状苗分离机机械化生产

Weak Signal Frequency Detection Based on a Fractional-Order Bistable System

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Chinese Physics Letters 2012年第6期29卷 13-16页

作者： HE Gui-tian LUO mao-Kang Department of Mathematics Sichuan UniversityChengdu 610064

We apply spectral power amplification to quantifying and investigating the phenomenon of stochastic resonance in fractional-order ***,the frequency of the weak mixed signal is detected by a stochastic resonance mechanism together with a power *** corresponding numerical results demonstrate the effectiveness of the proposed methods.

关键词： spectrum methods stochastic

Scalable Preparation of SrTiO_3 Submicro-wires from Layered Titanate Nanowires

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Chinese Journal of Aeronautics 2007年第2期20卷 177-180页

作者： TANG mao-yu JI tian-hao XIE Jian School of Materials Science and Engineering Beijing University of Aeronautics and Astronautics Beijing 100083 China

SrTiO3 submicro-wires were prepared by the reaction of layered titanatc nanowircs with Sr（OH）2 powder in an autoclave. The wires were investigated using X-ray diffraction （XRD）, scanning electron microscope （SEM）, transmission electron microscope （TEM）, Ultra-violet visible （UV-vis）, photoluminescence （PL） and Raman spectroscopy. The XRD measurement shows that the prepared SrTiO3 submicro-wircs hardly have impurity phases. The SEM and TEM images demonstrate that the scalable wires, which need to be processed at the reaction temperature of 180℃ for about 48 hours, are not composed of single crystals. The PL shows that the wire-like SrTiO3 has emission peaks at the wavelengths of 568 and 585 nm. Further, the Raman spectroscopy reveals structural changes in the products through different reaction time.

关键词： oxide titanate nanowires strontium titanate SrTiO3 wires

Metal complexes of a novel bis-β-diketone-type ligand and its copper(Ⅱ) complexes of two-photon biological imaging

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Science China Chemistry 2012年第3期55卷 334-340页

作者： ZHOU ShuangSheng XUE xuan JIANG Bo tian YuPeng Anhui Engineering Research Center of Modernized Chinese Medicine Department of PharmacyAnhui University of Traditional Chinese MedicineHefei 230031China Key Laboratory of Functional Inorganic Materials Chemistry of Anhui Province Department of ChemistryAnhui UniversityHefei 230039China State Key Laboratory of Crystal Materials Shandong UniversityJinan 502100China

A curcumin derivative ligand,1,7-bis(3-methoxyl-4-acetoxyl)phenyl-1,6-heptadiene-3,5-diketone (diacetylcurcumin,abbreviated as HL),and its Cu and Ni complexes have been synthesized and fully characterized by elemental analyses,IR,1 HNMR and molar *** resulting complexes exhibit two-photon excited fluorescence (TPEF) in DMF,and have been proven to be potentially useful for two-photon microscopy imaging in living *** addition,cytotoxicity tests showed that the low-micromolar concentrations of ML 2 did not cause significant reduction in cell viability over a period of at least 24 h and should be safe for further biological studies.

关键词： diacetylcurcumin complexes two-photon fluorescence cell imaging

Combining Metabolic Alkyne Labeling and Click Chemistry for Secretome Analysis of Serum-Containing Conditioned Medium

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Chinese Journal of Chemistry 2021年第7期39卷 1843-1848页

作者： Jiangnan Zheng Yuan mao Shun Feng Ruijun tian Department of Chemistry School of ScienceSouthern University of Science and TechnologyShenzhenGuangdong518055 China School of Life Science and Engineering Southwest Jiaotong UniversityChengduSichuan610031 China Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research Southern University of Science and Technology1088 Xueyuan RoadShenzhenGuangdong518055 China

Main observation and conclusion Bioorthogonal click chemistry has emerged as a powerful tool for the specific modification of proteins in complex *** labeling of proteins with azide followed by the copper-catalyzed azide−alkyne cycloaddition(CuAAC)with alkyne-based affinity probes/beads is widely applied to study protein turnover and post-translational modifications(PTMs).

关键词： Click chemistry Mass spectrometry Proteomics Secretome Metabolic labeling

Advances in the Development of Gradient Scaffolds Made of Nano-Micromaterials for Musculoskeletal Tissue Regeneration

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NANO-MICRO LETTERS 2025年第1期17卷 1-46页

作者： Fang, Lei Lin, Xiaoqi Xu, Ruian Liu, Lu Zhang, Yu tian, Feng Li, Jiao Jiao Xue, Jiajia Beijing Univ Chem Technol Beijing Lab Biomed Mat Beijing 100029 Peoples R China Beijing Univ Chem Technol State Key Lab Organ Inorgan Composites Beijing 100029 Peoples R China Univ Technol Sydney Fac Engn & IT Sch Biomed Engn Sydney NSW 2007 Australia

This review highlights the gradient variations in the structural composition of musculoskeletal tissues and comprehensively examines recent progress in the fabrication and application of biomimetic gradient scaffolds for musculoskeletal *** challenges and prospects of gradient scaffolds for clinical application are discussed. The intricate hierarchical structure of musculoskeletal tissues, including bone and interface tissues, necessitates the use of complex scaffold designs and material structures to serve as tissue-engineered substitutes. This has led to growing interest in the development of gradient bone scaffolds with hierarchical structures mimicking the extracellular matrix of native tissues to achieve improved therapeutic outcomes. Building on the anatomical characteristics of bone and interfacial tissues, this review provides a summary of current strategies used to design and fabricate biomimetic gradient scaffolds for repairing musculoskeletal tissues, specifically focusing on methods used to construct compositional and structural gradients within the scaffolds. The latest applications of gradient scaffolds for the regeneration of bone, osteochondral, and tendon-to-bone interfaces are presented. Furthermore, the current progress of testing gradient scaffolds in physiologically relevant animal models of skeletal repair is discussed, as well as the challenges and prospects of moving these scaffolds into clinical application for treating musculoskeletal injuries.

关键词： Gradient scaffolds Musculoskeletal tissues Advanced manufacturing Biomaterials Tissue regeneration

Effect of supplementing Qi and promoting blood circulation therapy on left ventricular remodeling: a systematic review and Meta-analysis

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Journal of Traditional Chinese Medicine 2020年第3期40卷 365-375页

作者： mao Shuai Zuo tian Jiang Lu Zhang Minzhou Key Discipline of Integrated Chinese and Western Medicine Second Clinical CollegeGuangzhou University of Chinese MedicineGuangzhou 510405China Cardiovascular Institute Stanford University School of MedicineStanford 94305USA Department of Critical Care Medicine Guangdong Provincial Hospital of Chinese MedicineGuangzhou 510120China

OBJECTIVE: To evaluate the effectiveness of an adjuvant therapy from Traditional Chinese Medicine for supplementing Qi and promoting blood circulation(CMSQPBC) on left ventricular remodeling in patients after myocardial infarction(MI).METHODS: Randomized controlled trials were identified in the Cochrane Library, Embase, Web of Science, PubMed, China National Knowledge Infrastructure Database, Chinese Biomedical Literature Database, China Science and Technology Journal Database, Wanfang databases, reviews, and reference lists of relevant articles. The weighted mean difference(WMD) was calculated for changes in the left ventricular ejection fraction(LVEF), LV end-diastolic volume(LVEDV) and LV end-systolic volume(LVESV) from baseline to follow-up(> 3 months) by using random-effects Meta-analysis. The primary outcome was change in LVEF, and secondary outcomes were changes in LV dimensions including LVEDV and ***: A total of 10 trials(enrolling 854 participants, median follow-up six months) evaluated the association between CMSQPBC and changes in LV function and volume. Compared with the control group, CMSQPBC significantly improved LVEF(854 patients;WMD: 4.97%, 95% CI: 3.78-6.15;P < 0.001)and attenuated the enlargement of LVEDV(607 patients;WMD:-7.89 mL, 95% CI:-11.54 to-4.24;P<0.001) and LVESV(364 patients;WMD =-5.80 mL,95% CI,-9.60 to-2.01;P < 0.01).CONCLUSION: CMSQPBC may reverse deleterious pathological remodeling after myocardial infarction. Higher quality and more rigorous randomized trials with larger sample sizes are needed to further confirm the findings.

关键词： Ventricular remodeling Myocardial infarction Reinforcing Qiactivating blood Qi-deficiency blood stasis Systematic review Meta-analysis

PIV EXPERIMENTAL RESEARCH OF FLOW STRUCTURE IN RECTANGULAR CHANNEL WITH TRANSVERSELY PLACED SPIRAL COIL INSERT

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Journal of Hydrodynamics 2012年第4期24卷 518-525页

作者： TANG Yu-feng tian mao-cheng ZHANG Guan-min School of Energy Source and Power Engineering Shandong UniversityJinan 250061China

The flow field in a rectangular channel with a transversely placed spiral coil insert is investigated by Particle Image Velocimetry （PIV） measurements in both transverse and longitudinal sections. The experimental results show that multi-longitudinal vortices are induced downstream of the spiral coil and are distributed as a symmetrical vortex array along the horizontal central line of the transverse section. Along the mainstream, due to the spiral motion of the longitudinal vortices, the velocity fluctuates in a manner of the damped sinusoidal curve and the velocity component in the wall normal direction is improved in the channel. Com- pared with the flow field in a smooth channel it is found that the movement of the longitudinal vortices can cause a continuous dis- turbance near the channel walls and thus enhances the fluid velocity in the near wall region, which consequently leads to the redu- ction of the velocity gradient and a more uniform velocity distribution. With the increase of the Reynolds number, the induced longitudinal vortices gain strength and become straighter and closer to the channel walls, thus the turbulence intensity is further enha- nced in this area.

关键词： Particle Image Velocimetry (PIV) spiral coil longitudinal vortices flow disturbance

Vertical Differential Structural Deformation of the Main Strike-slip Fault Zones in the Shunbei Area,Central Tarim Basin:Structural Characteristics,Deformation Mechanisms,and Hydrocarbon Accumulation Significance

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Acta Geologica Sinica(English Edition) 2022年第4期96卷 1415-1431页

作者： tian Fanglei HE Dengfa CHEN Jiajun mao Danfeng School of Energy Resources China University of Geosciences(Beijing)Beijing 100083China Key Laboratory of Marine Reservoir Evolution and Hydrocarbon Enrichment Mechanism Ministry of EducationBeijing 100083China

Vertical differential structural deformation(VDSD),one of the most significant structural characteristics of strike-slip fault zones(SSFZs)in the Shunbei area,is crucial for understanding deformation in the SSFZ and its hydrocarbon accumulation *** on drilling data and high-precision 3-D seismic data,we analyzed the geometric and kinematic characteristics of the SSFZs in the Shunbei *** with the stratification of the rock mechanism,the structural deformations of these SSFZs in different formations were differentiated and divided into four deformation *** to comprehensive structural interpretations and comparisons,three integrated 3-D structural models could describe the VDSD of these *** time-space coupling of the material basis(rock mechanism stratification),changing dynamic conditions(e.g.,changing stress-strain states),and special deformation mechanism of the en echelon normal fault array uniformly controlled the formation of the VDSD in the SSFZs of the Shunbei *** VDSD of the SSFZs in this area controlled the entire hydrocarbon accumulation ***-stage structural superimposing deformation influenced the hydrocarbon migration,accumulation,distribution,preservation,and secondary adjustments.

关键词： strike-slip fault vertical differential structural deformation hydrocarbon accumulation Shunbei area central Tarim Basin