2,883 research outputs found
FABRICATED Bi2O3/TiO2 HETEROJUNCTION NANOCOMPOSITES FOR THE DEGRADATION OF REVERSE OSMOSIS CONCENTRATE
Master'sMASTER OF SCIENC
安全型糖尿病足趾甲修剪钳的研制与应用*
Objective: To evaluate the clinical application effects of new type secure toenail clipper for diabetes patients. Methods: Combining advantages and abandoning shortcomings of common nail clippers and scissors, designed a new type toenail clipper for diabetes patients with abnormal and (or) hard toenails, and applied it in 450 diabetes patients. Results: Easy application with safety and effective pruning. After pruning, the pain and oppression feeling caused by abnormal and (or) hard toenails relieved, and no case had diabetic foot ulcer. Conclusions: The new type secure toenail clipper can effectively reduce the sense of pain and oppression, and decrease the incidence of diabetic foot ulcer.目的 评价安全型糖尿病足趾甲修剪钳的临床应用效果。方法 结合普通指甲钳及剪刀的优点,摒弃缺点,针对糖尿病足顽固趾甲设计一款新型的趾甲修剪钳,应用于450例糖尿病足顽固趾甲患者。结果 操作者施力方便,修剪安全、有效。修剪后患者疼痛感与压迫感减轻,无1例发生糖尿病足溃疡。结论 新型糖尿病足趾甲修剪钳能够有效减轻患者顽固趾甲所致的疼痛感与压迫感,降低糖尿病足溃疡发生率
留置鼻胃管引发贲门糜烂的个案报道
To report a case of the cardiac erosion caused by indwelling nasogastric tube. Analyzed the reasons of the cardiac erosion from the aspects of the lesion location, influential factors and so on, and put forward new measures to prevent the complication of nasogastric gavage.报告1例留置鼻胃管所引发的贲门糜烂个案。对患者出现贲门糜烂的原因从发生部位、影响因素等多方面进行分析,提出鼻饲并发症预防的新对策
Unifying ultrafast demagnetization and intrinsic Gilbert damping in Co/Ni bilayers with electronic relaxation near the Fermi surface
The ability to controllably manipulate the laser-induced ultrafast magnetic
dynamics is a prerequisite for future high speed spintronic devices. The
optimization of devices requires the controllability of the ultrafast
demagnetization time, , and intrinsic Gilbert damping, . In previous attempts
to establish the relationship between and , the rare-earth doping of a
permalloy film with two different demagnetization mechanism is not a suitable
candidate. Here, we choose Co/Ni bilayers to investigate the relations between
and by means of time-resolved magneto-optical Kerr effect (TRMOKE) via
adjusting the thickness of the Ni layers, and obtain an approximately
proportional relation between these two parameters. The remarkable agreement
between TRMOKE experiment and the prediction of breathing Fermi-surface model
confirms that a large Elliott-Yafet spin-mixing parameter is relevant to the
strong spin-orbital coupling at the Co/Ni interface. More importantly, a
proportional relation between and in such metallic films or heterostructures
with electronic relaxation near Fermi surface suggests the local spin-flip
scattering domains the mechanism of ultrafast demagnetization, otherwise the
spin-current mechanism domains. It is an effective method to distinguish the
dominant contributions to ultrafast magnetic quenching in metallic
heterostructures by investigating both the ultrafast demagnetization time and
Gilbert damping simultaneously. Our work can open a novel avenue to manipulate
the magnitude and efficiency of Terahertz emission in metallic heterostructures
such as the perpendicular magnetic anisotropic Ta/Pt/Co/Ni/Pt/Ta multilayers,
and then it has an immediate implication of the design of high frequency
spintronic devices
Efficiency Resource Allocation for Device-to-Device Underlay Communication Systems: A Reverse Iterative Combinatorial Auction Based Approach
Peer-to-peer communication has been recently considered as a popular issue
for local area services. An innovative resource allocation scheme is proposed
to improve the performance of mobile peer-to-peer, i.e., device-to-device
(D2D), communications as an underlay in the downlink (DL) cellular networks. To
optimize the system sum rate over the resource sharing of both D2D and cellular
modes, we introduce a reverse iterative combinatorial auction as the allocation
mechanism. In the auction, all the spectrum resources are considered as a set
of resource units, which as bidders compete to obtain business while the
packages of the D2D pairs are auctioned off as goods in each auction round. We
first formulate the valuation of each resource unit, as a basis of the proposed
auction. And then a detailed non-monotonic descending price auction algorithm
is explained depending on the utility function that accounts for the channel
gain from D2D and the costs for the system. Further, we prove that the proposed
auction-based scheme is cheat-proof, and converges in a finite number of
iteration rounds. We explain non-monotonicity in the price update process and
show lower complexity compared to a traditional combinatorial allocation. The
simulation results demonstrate that the algorithm efficiently leads to a good
performance on the system sum rate.Comment: 26 pages, 6 fgures; IEEE Journals on Selected Areas in
Communications, 201
Cooperative Relative Positioning of Mobile Users by Fusing IMU Inertial and UWB Ranging Information
Relative positioning between multiple mobile users is essential for many
applications, such as search and rescue in disaster areas or human social
interaction. Inertial-measurement unit (IMU) is promising to determine the
change of position over short periods of time, but it is very sensitive to
error accumulation over long term run. By equipping the mobile users with
ranging unit, e.g. ultra-wideband (UWB), it is possible to achieve accurate
relative positioning by trilateration-based approaches. As compared to vision
or laser-based sensors, the UWB does not need to be with in line-of-sight and
provides accurate distance estimation. However, UWB does not provide any
bearing information and the communication range is limited, thus UWB alone
cannot determine the user location without any ambiguity. In this paper, we
propose an approach to combine IMU inertial and UWB ranging measurement for
relative positioning between multiple mobile users without the knowledge of the
infrastructure. We incorporate the UWB and the IMU measurement into a
probabilistic-based framework, which allows to cooperatively position a group
of mobile users and recover from positioning failures. We have conducted
extensive experiments to demonstrate the benefits of incorporating IMU inertial
and UWB ranging measurements.Comment: accepted by ICRA 201
Design and clinical application of colonoscopy convenient pant
结肠镜检查是诊治肠道疾病的首选方法。随着肠道疾病发病率的增长,越来越多的人群需要接受结肠镜检查。为了方便检查、保护病人隐私及防止受凉等,笔者设计制作了结肠镜检查方便裤,并已经很好地将其应用于临床。Colonoscopy is the first choice for diagnosis and treatment of intestinal diseases. With the growth of the incidence of intestinal disease, more and more people need colonoscopy. In order to inspecting conveniently, protecting patients’ privacy and preventing them from catching a cold, we designed the colonoscopy convenient pant and have applied it into clinic well
Improved mechanical and electrical properties in electrospun polyimide/multiwalled carbon nanotubes nanofibrous composites
Highly aligned polyimide (PI) and PI/multi-walled carbon nanotubes (PI/MWCNTs) nanofibrous composites by incorporating poly(ethylene oxide) as the dispersing medium were fabricated using electrospinning technique. The morphology, mechanical, and electrical properties of the electrospun nanofibrous composites were investigated. Scanning electron microscope showed that the functionalized MWCNTs (f-MWCNTs) were well dispersed and oriented along the nanofiber axis. Analysis of electrical properties indicated a remarkable improvement on the alternating current conductivity by introduction of the aligned f-MWCNTs. Besides, with addition of 3 vol.% f-MWCNTs, the obvious enhancement of tensile modulus and strength was achieved. Thus, the electrospun PI/MWCNTs nanofibrous composites have great potential applications in multifunctional engineering materials
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