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A Geometric Modeling and Computing Method for Direct Kinematic Analysis of 6-4 Stewart Platforms

A geometric modeling and solution procedure for direct kinematic analysis of 6-4 Stewart platforms with any link parameters is proposed based on conformal geometric algebra (CGA). Firstly, the positions of the two single spherical joints on the moving platform are formulated by the intersection, dissection, and dual of the basic entities under the frame of CGA. Secondly, a...

Comparison of three tools for predicting primary osteoporosis in an elderly male population in Beijing: a cross-sectional study

Comparison of three tools for predicting primary osteoporosis in an elderly male population in Beijing: a cross-sectional study XiaoDong Zhang,1,* JiSheng Lin,1,* Yong Yang,1 Hao Wu,2 Yongjin Li,3 ... (Mahr GmbH, Gottingen, Germany). The database established was checked by two researchers (XiaoDong Zhang and JiSheng Lin) to ensure the quality of data and control the total amount of data input per day

Side Flow Effect on Surface Generation in Nano Cutting

The side flow of material in nano cutting is one of the most important factors that deteriorate the machined surface quality. The effects of the crystallographic orientation, feed, and the cutting tool geometry, including tool edge radius, rake angle and inclination angle, on the side flow are investigated employing molecular dynamics simulation. The results show that the...

Application of 3D–printed and patient-specific cast for the treatment of distal radius fractures: initial experience

BackgroundDistal radius fracture is common in the general population. Fracture management includes a plaster cast, splint and synthetic material cast to immobilise the injured arm. Casting complications are common in those conventional casting technologies. 3D printing technology is a rapidly increasing application in rehabilitation. However, there is no clinical study...

Crystal Orientation Effect on the Subsurface Deformation of Monocrystalline Germanium in Nanometric Cutting

Molecular dynamics simulations of nanometric cutting on monocrystalline germanium are conducted to investigate the subsurface deformation during and after nanometric cutting. The continuous random network model of amorphous germanium is established by molecular dynamics simulation, and its characteristic parameters are extracted to compare with those of the machined deformed...

Study on Crystallographic Orientation Effect on Surface Generation of Aluminum in Nano-cutting

The material characteristics such as size effect are one of the most important factors that could not be neglected in cutting the material at nanoscale. The effects of anisotropic nature of single crystal materials in nano-cutting are investigated employing the molecular dynamics simulation. Results show that the size effect of the plastic deformation is based on different...

Nanometric Cutting of Silicon with an Amorphous-Crystalline Layered Structure: A Molecular Dynamics Study

Materials with specific nanometric layers are of great value in both theoretical and applied research. The nanometric layer could have a significant influence on the response to the mechanical loading. In this paper, the nanometric cutting on the layered systems of silicon has been studied by molecular dynamics. This kind of composite structure with amorphous layer and...

Prognosis impact of clinical characteristics in patients with inoperable esophageal squamous cell carcinoma

, further larger prospective trials are warranted to confirm our findings. Author Contributions Conceptualization: Ying Yang, Xiaodong Zhang. Data curation: Ying Yang, Jun Jia, Xiaodong Zhang. Formal ... analysis: Ying Yang. Funding acquisition: Ying Yang, Xiaodong Zhang. Methodology: Ying Yang, Xiaodong Zhang. Project administration: Xiaodong Zhang. Supervision: Xiaodong Zhang. Writing ± original draft

Performance of the High Resolution, Multi-collector Helix MC Plus Noble Gas Mass Spectrometer at the Australian National University

Performance of the Helix MC Plus noble gas mass spectrometer installed at the Australian National University (ANU) is reported. Results for sensitivity, mass discrimination and their linearity against partial pressure of noble gases, and mass resolution of the mass spectrometer are presented, and the results are compared with those of conventional noble gas mass spectrometers...

BFH-OSTM, a new predictive screening tool for identifying osteoporosis in elderly Han Chinese males

BFH-OSTM, a new predictive screening tool for identifying osteoporosis in elderly Han Chinese males JiSheng Lin,1 Yong Yang,1 XiaoDong Zhang,1 Zhao Ma,1 Hao Wu,2 Yongjin Li,3 Xiuquan Yang,4 Qi Fei,1

A bright organic NIR-II nanofluorophore for three-dimensional imaging into biological tissues

These authors contributed equally: Hao Wan, Jingying Yue, Shoujun Zhu, Takaaki Uno, Xiaodong Zhang, Qinglai Yang. AffiliationsDepartment of Materials Science and Engineering, South University of Science ... in:Nature Research journals • PubMed • Google Scholar Search for Xiaodong Zhang in:Nature Research journals • PubMed • Google Scholar Search for Qinglai Yang in:Nature Research journals • PubMed • Google

Self-healable wire-shaped supercapacitors with two twisted NiCo2O4 coated polyvinyl alcohol hydrogel fibers

Wire-shaped supercapacitors (SCs) possessing light-weight, good flexibility and weavability have caught much attention, but it is still a challenge to extend the lifespan of the devices with gradual aging due to the rough usage or external factors. Herein, we report a new stretchable and self-healable wire-shaped SC. In the typical process, two polyvinyl alcohol/potassium...

Plant Litter Submergence Affects the Water Quality of a Constructed Wetland

Plant litter is an indispensable component of constructed wetlands, but how the submergence of plant litter affects their ecosystem functions and services, such as water purification, is still unclear. Moreover, it is also unclear whether the effects of plant litter submergence depend on other factors such as the duration of litter submergence, water source or litter species...

The Fragment HMGA2-sh-3p20 from HMGA2 mRNA 3′UTR Promotes the Growth of Hepatoma Cells by Upregulating HMGA2

for Weiying Zhang in:Nature Research journals • PubMed • Google Scholar Search for Lihong Ye in:Nature Research journals • PubMed • Google Scholar Search for Xiaodong Zhang in:Nature Research journals ... to Lihong Ye or Xiaodong Zhang. Electronic supplementary material Supplemental Information Rights and permissions Open Access This article is licensed under a Creative Commons Attribution 4.0

Regulation of G0/G1 Switch Gene 2 (G0S2) Protein Ubiquitination and Stability by Triglyceride Accumulation and ATGL Interaction

Intracellular triglyceride (TG) hydrolysis or lipolysis is catalyzed by the key intracellular triglyceride hydrolase, adipose triglyceride lipase (ATGL). The G0/G1 Switch Gene 2 (G0S2) was recently identified as the major selective inhibitor of ATGL and its hydrolase function. Since G0S2 levels are dynamically linked and rapidly responsive to nutrient status or metabolic...

Agent Behavior-Based Simulation Study on Mass Collaborative Product Development Process

Mass collaborative product development (MCPD) benefits people by high innovation products with lower cost and shorter lead time due to quick development of group innovation, Internet-based customization, and prototype manufacturing. Simulation is an effective way to study the evolution process and therefore to guarantee the success of MCPD. In this paper, an agent behavior-based...

Hydrogel-based phototherapy for fighting cancer and bacterial infection

24 501  25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 60 61 62  June 2017 | Vol.60 No.6 63 64 65 66 2016, 6: 33594 Xiaodong Zhang received his BSc degree in biomedical engineering from

BFH-OST, a new predictive screening tool for identifying osteoporosis in postmenopausal Han Chinese women

BFH-OST, a new predictive screening tool for identifying osteoporosis in postmenopausal Han Chinese women Zhao Ma, Yong Yang,* JiSheng Lin, XiaoDong Zhang, Qian Meng, BingQiang Wang, Qi Fei

Downregulated miR-29a/b/c during Contact Inhibition Stage Promote 3T3-L1 Adipogenesis by Targeting DNMT3A

Differentiation of 3T3-L1 cells into adipocytes involves a highly-orchestrated series of events including contact inhibition (CI), clonal expansion, growth arrest, and terminal differentiation. Recent study demonstrated that 3T3-L1 preadipocytes will not be differentiated into mature adipocytes without CI stage, which indicated that CI stage plays an important role during 3T3-L1...