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Pressure from the lips and the tongue in children with class III malocclusion

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2007年第5期8卷 296-301页

作者： ruan wen-hua SU Ji-mei YE Xiao-wei Department of Stomatology Children ＇s Hospital School of Medicine Zhejiang University Hangzhou 310003 China

Objective： To discuss possible relationships between class In malocclusion and perioral forces by measuring the pressure from the lips and the tongue of children with class nI malocclusion. Methods： Thirty-one children with class In malocclusion were investigated and their perioral forces were measured at rest and during swallowing under natural head position by a custom-made miniperioral force computer measuring system. Results： The resting pressures exerted on the labial side and palatine side of the upper lett incisor, as well as the labial side and lingual side of the lower lett incisor, were 0 g/cm^2, 0 g/cm^2, 0.57 g/cm^2 and 0.23 g/cm^2, respectively. Correspondingly, the swallowing forces were 2.87 g/cm^2, 5.97 g/cm^2, 4.09 g/cm^2 and 7.89 g/cm^2, respectively. No statistical difference between muscular pressure and gender existed. During swallowing, the lingual forces were significantly higher than the labial forces （P〈0.01）, however, at rest there was no significantly different force between these two sides. Compared to the normal occlusion patients, children with class Ⅲ malocclusion had lower pedoral forces. The upper labial resting forces （P〈0.01）, the lower labial resting forces （P〈0.05） and all the swallowing pressures from the lips and the tongue （P〈0.01） showed statistical differences between the two different occlusion conditions. Meanwhile, no significant difference was found for the resting pressure from the tongue between class Ⅲ malocclusion and normal occlusion. Conclusion： Patients with class Ⅲ malocclusion have lower perioral forces and this muscle hypofunction may be secondary to the spatial relations of the jaws. The findings support the spatial matrix hypothesis.

关键词： Deciduous dentition Perioral force Pressure transducer Class Ⅲ malocclusion

Energy Spectra of a Magnetic Quantum Ring with an Off-Center Impurity

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Communications in Theoretical Physics 2006年第4期45卷 737-740页

作者： LEE Chak-Man LI Jun-Qin ruan wen-Ying Richard LEE Chak-Hong Department of Material Science and Engineering Shenzhen University Shenzhen 518060 China Department of Electrical and Computer Engineering University of Illinois at Urbana-Champaign Urbana IL61801 USA Department of Applied Physics South China University of Technology Guangzhou 510641 China

In this paper, we calculate the low-lying spectra of a single-electron magnetic quantum ring with an offcenter Coulomb impurity, where the magnetic field is zero within the ring and constant elsewhere. The impurity, either an acceptor or a donor, is located at a distance d as measured from the plane of the ring along the vertical z direction. The magnetic moments are found in order to get visible discontinuities at the points of the ground-state orbital angular momentum L transitions induced by magnetic fields.

关键词： magnetic quantum ring Meissner effect magnetic moment

Magic Angular Momenta of a Spin-Aligned 6-Electron Quantum Dot

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Chinese Physics Letters 1997年第2期14卷 121-123页

作者： BAO Cheng-guang ruan wen-ying LIU You-yan ZHANG Zhao-qing Department of Physics Zhongshan UniversityGuangzhou 510275 Department of Physics South China University of TechnologyGuangzhou 510641 Department of Physics Hong Kong University of Science and TechnologyClearwater BayHong Kong

The low-lying states of a spin-aligned 6-electron quantum dot may prefer the regular hexagon and regular centered pentagon ***,these favourable structures may be prohibited by inherent *** on this consideration,a coup... 详细信息

关键词： symmetry. equations Electron

不同水源灌溉对玉米田Pb、Ni、Cr迁移积累的影响

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节水灌溉 2024年第10期 68-76页

作者：耿国强樊雅琼申丽霞李国元胡婧娟王丹阮文刚太原理工大学水利科学与工程学院太原030024 山西汾河灌溉管理有限公司汾东供水管理中心山西晋中030900

再生水资源化是缓解区域水资源紧张和发展农业用水的良好解决方案。试验以河水(R0)、混合水(河水∶再生水=1∶1,R1)、再生水(R2)和井水(CK)为不同处理的灌溉水源,以大田玉米为研究对象,探究不同水源灌溉对不同层次土壤(0~200 cm)和玉米... 详细信息

再生水资源化是缓解区域水资源紧张和发展农业用水的良好解决方案。试验以河水(R0)、混合水(河水∶再生水=1∶1,R1)、再生水(R2)和井水(CK)为不同处理的灌溉水源,以大田玉米为研究对象,探究不同水源灌溉对不同层次土壤(0~200 cm)和玉米植株各器官中Pb、Ni、Cr的迁移和累积规律以及对玉米生长和产量的影响。结果表明,灌水定额相同时,短时间内(>32 d)再生水灌溉导致了Pb向土壤深层(>70 cm)的迁移和Ni、Cr在土体0~200 cm范围内的累积,其中,Pb含量减少了9.8%~38.7%,Ni、Cr含量分别升高了2.5%~21.2%和5.5%~166.8%。但是,试验结束时各处理土壤中重金属含量均低于苗期。对于植物体,灌水前后,CK处理植株体内重金属相对累积量均高于R0、R1、R2处理,Pb分别高23.2%、3.5%和24.4%,Ni分别高12.7%、0.1%和1.1%,Cr分别高19.7%、1.6%和6.5%,玉米成熟期各处理籽粒中重金属含量无显著差异,但植株体内重金属总量均表现为R0>R2>CK、R1>CK。与井水相比,各处理均增加了玉米株高、叶面积和地上生物量,R0、R1、R2处理与CK相比,2022年分别增产1197.9 kg/hm^(2)、1296.6 kg/hm^(2)和447.4 kg/hm^(2),2023年分别增产472.1 kg/hm^(2)、638.4kg/hm^(2)和243.9 kg/hm^(2)。因此,混合水灌溉增产效应最大,但与井水灌溉相比,混合水也较易导致重金属在植物体内的富集,而采用再生水灌溉时,土壤中重金属的残留风险较大,探讨两者合理的掺灌比例尤为重要。研究为不同水资源优化配置利用提供了参考,对于非常规水灌溉利用具有一定借鉴意义。

关键词：再生水河水混合水植物中富集重金属迁移积累

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Rules for Identifying the Magic Angular Momenta of Quantum Dots in a Strong Magnetic Field

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Chinese Physics Letters 2000年第10期17卷 752-754页

作者： ruan wen-Ying LI Quan CHEN Guo-Sen HE Hao-Pei PAN Yu-Bin Department of Physics South China University of TechnologyGuangzhou 510641 Department of Physics and Materials Science Department of Electronic Engineering City University of Hong KongHong Kong

In quantum dots under a strong magnetic field, all the electrons occupy only the lowest Landau level and are spin polarized. When an orbiting electron is regarded as a quasiparticle, the interaction between a pair of quasiparticles is a short range attraction matched to a long range repulsive tail. Magic numbers of angular momentum are justthose where the quasiparticles can be arranged into compact clusters with their sizes determined by the saturation of the short range attraction.

关键词： Magic Strong quasi

Calculation of Inelastic Neutron Scattering on ^(11)B

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Chinese journal of nuclear physics 1995年第3期17卷 265-267页

作者： Xie wen-fang Department of Physics,Guangdong University of Technology,Guangzhou 510090ruan wen-ying Department of Physics,South China University of Technology,Guangzhou 510641 广东工业大学物理系广东广州 510090 华南理工大学物理系广东广州

The microscopic DWBA was used to calculate the inelastic neutron scattering on 11B to 2.14MeV excited state and some energy dependent parameters were used to improve the *** inte-grated inelastic cross sections and the angular distributions of the 11B（n,n′）11B*（2.14 MeV excitedstate）were given for the incident neutrons whose energy varies from 7.54 MeV to 20.0 *** also given for the experimental blank data.

关键词： Inelastic neutron scattering Microscopic DWBA Integrated cross section Angular distribution

Colorectal cancer screening:The value of early detection and modern challenges

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World Journal of Gastroenterology 2024年第20期30卷 2726-2730页

作者： Jian Li Zhi-Peng Li wen-Jie ruan Wei Wang Department of Interventional Oncology Municipal Hospital Affiliated to Taizhou UniversityTaizhou 318000Zhejiang ProvinceChina School of Medicine Taizhou UniversityTaizhou 318000Zhejiang ProvinceChina

The screening of colorectal cancer(CRC)is pivotal for both the prevention and treatment of this disease,significantly improving early-stage tumor detection *** advancement not only boosts survival rates and quality of life for patients but also reduces the costs associated with ***,the adoption of CRC screening methods faces numerous challenges,including the technical limitations of both noninvasive and invasive methods in terms of sensitivity and ***,socioeconomic factors such as regional disparities,economic conditions,and varying levels of awareness affect screening *** coronavirus disease 2019 pandemic further intensified these challenges,leading to reduced screening participation and increased waiting ***,the growing prevalence of early-onset CRC necessitates innovative screening *** response,research into new methodologies,including artificial intelligence-based systems,aims to improve the precision and accessibility of *** measures by governments and health organizations to enhance CRC screening efforts are underway,including increased advocacy,improved service delivery,and international *** role of technological innovation and global health collaboration in advancing CRC screening is *** such as artificial intelligence and gene sequencing are set to revolutionize CRC screening,making a significant impact on the fight against this *** the rise in early-onset CRC,it is crucial for screening strategies to continually evolve,ensuring their effectiveness and applicability.

关键词： Colorectal cancer Early detection Economic implications Noninvasive tests Quality of life Survival rates Therapeutic modalities Technical challenges

Injection molding of highly filled microcrystalline cellulose/polycaprolactone composites with the aid of reversible Diels-Alder reaction

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Journal of Materials Science & Technology 2024年第3期170卷 246-254页

作者： Ze Pu Wang wenHong ruan MinZhi Rong MingQiu Zhang Key Laboratory for Polymeric Composite and Functional Materials of MOE GD HPPC LabIGCMESchool of ChemistrySun Yat-Sen UniversityGuangzhou 510275China

To tackle the challenge of producing highly filled polymer composites using the traditional injection molding technique,which is characterized by the fairly high melt viscosity that makes mold filling difficult,the authors propose a solution based on dynamic covalent *** demonstrated by the proof-of-concept experiments,the 4-arm starshaped polycaprolactone(PCL)oligomers and microcrystalline cel-lulose(MCC)are crosslinked by the reversible Diels-Alder(DA)*** flowability of the compounds greatly decreases due to the dissociation of the intercomponent DA bonds at the retro-reaction tempera-ture,and the networked architecture is reconstructed during cooling as a result of the forward DA ***,the high-loading MCC fillers are well distributed in the matrix and covalently bonded to the nearby PCL,forming a striking contrast to the control in which linear PCL acts as the *** DA bonds crosslinked biodegradable PCL composites exhibit decent mechanical strength(20.7 MPa)even at the MCC fraction of 65 wt%,which is superior to those(5-12.2 MPa)of the highly filled PCL composites(with filler contents of 50-63.8 wt%)reported so *** proposed approach has sufficient expansibility for the fabrication of the highly filled polymer composites constructed by other types of matrix and fillers.

关键词： Polymer composites Microcrystalline cellulose Polycaprolactone Injection molding Dynamic reversible chemistry

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基于浆液粘度时变性的岩体裂隙注浆扩散模型

岩石力学与工程学报 2005年第15期24卷 2709-2714页

作者：阮文军同济大学地下建筑与工程系

通过大量试验证明水泥基浆液的粘度存在时变性,其规律符合指数函数分布;而动切力随时间变化不大,可视为无时变性。在此基础上,建立了用于岩体裂隙的稳定性浆液注浆扩散模型,开发了计算机程序。通过2个工程实例的对比结果证明了这一理论... 详细信息

通过大量试验证明水泥基浆液的粘度存在时变性,其规律符合指数函数分布;而动切力随时间变化不大,可视为无时变性。在此基础上,建立了用于岩体裂隙的稳定性浆液注浆扩散模型,开发了计算机程序。通过2个工程实例的对比结果证明了这一理论的计算结果符合工程实际。

关键词：岩土力学粘度时变性水泥基浆液注浆扩散