PEN纤维帘线浸胶过程中聚集态结构演变和力学性能研究

探讨PEN纤维帘线浸胶过程中聚集态结构演变和力学性能。通过对浸胶整理过程中的干燥一区、拉伸区、干燥二区和定形区这4个区域的样品进行研究,分析了PEN纤维帘线在浸胶后整理过程中聚集态结构、热性能、取向参数、力学性能的演变。结果表明:PEN纤维帘线在浸胶过程中结晶度由67.85%逐渐增加到69.45%;晶面的晶粒尺寸均略微增大;DSC熔融峰逐渐尖锐,结晶度增加,表明分子链聚集态结构趋于稳定和完善。PEN纤维帘线在热定形处理时纤维非晶区大分子链的取向度无明显下降,帘线的热收缩降为1.50%,有利于提高纤维帘线的热稳定性。动态和静态力学性能表明,PEN纤维帘线的断裂强度和模量未出现明显变化。

用最佳的方式拥抱生活 巴塞罗那CASTILLEJOS公寓

CASTILLEJOS公寓是由一处面积刚刚超过50m2的旧商业地产改建成的住宅项目。房屋位于巴塞罗那Eixample区一栋传统风格的漂亮建筑内。它有一个朝向街道立面的大开口,确保了充足的自然采光,同侧还有一个较小的开口,并有一个后院。难得的是室内高度超过3m,这为空间可能的各种新功能提供了机会。

不同pH条件下红小豆分离蛋白的加工特性分析

[目的]分析不同pH条件下红小豆分离蛋白的加工特性。[方法]以大豆分离蛋白为对照,设定不同pH条件,分析红小豆和大豆蛋白主要的加工特性。[结果]在较低pH下,红小豆分离蛋白具有良好的溶解性能,其乳化性、起泡性和吸油性与大豆分离蛋白大致相同,其乳化稳定性和起泡稳定性比大豆蛋白更优;当浓度为10%时,红小豆蛋白显示出凝胶性。[结论]该研究可为红小豆的综合开发应用提供新的加工基础依据。

双循环群上连通凯莱图的数目

令p是一个奇素数.在本文中,我们利用波利亚计数定理,得到在同构意义下双循环群T_(4p)=<a,b|a^(P)=b^(4)=1,b^(−1)ab=a^(−1)>上的连通凯莱图的数目.

双循环群上低度Cayley图的同构类

本文利用谱方法和CI-群性质,对双循环群T_(4p)=<a,b|a^(p)=b^(4)=1,b^(-1)ab=a^(-1)>(其中p为奇素数)上的低度(四次、五次和六次)Cayley图的同构类进行了完全分类.此外,利用二次互反律,本文得到了T_(4p)上低阶(四次、五次和六次)Cayley图同构类的确切数目.

新型脱矿同种骨修复材料的骨诱导活性研究

目的研究一种新型脱矿同种骨修复材料的骨诱导活性。方法在裸鼠腿部肌肉内植入脱矿骨纤维材料,植入样品后第2周和第4周取材进行组织学形态观察和骨诱导活性研究。结果脱矿骨纤维植入裸鼠肌肉后2周,可见新生血管和软骨形成,植入4周后,可见多个新骨形成区。结论该种脱矿骨纤维具有明显的骨诱导效果,可作为一种较理想的临床骨修复材料。

Experimental repetitive mild traumatic brain injury induces deficits in trabecular bone microarchitecture and strength in mice

To evaluate the long-term consequence of repetitive mild traumatic brain injury （mTBI） on bone, mTBI was induced in 10-week-old female C57BL/6J mice using a weight drop model, once per day for 4 consecutive days at different drop heights （0.5, 1 and 1.5 m） and the skeletal phenotype was evaluated at different time points after the impact. In vivo micro-CT （μ-CT） analysis of the tibial metaphysis at 2, 8 and 12 weeks after the impact revealed a 5%-32% reduction in trabecular bone mass. Histomorphometric analyses showed a reduced bone formation rate in the secondary spongiosa ofl.5 m impacted mice at 12 weeks post impact. Apparent modulus （bone strength）, was reduced by 30% （P 〈 0.05） at the proximal tibial metaphysis in the 1.5 m drop height group at 2 and 8 weeks post impact. Ex vivo μ-CT analysis of the fifth lumbar vertebra revealed a significant reduction in trabecular bone mass at 12 weeks of age in all three drop height groups. Serum levels of osteocalcin were decreased by 22%, 15%, and 19% in the 0.5, 1.0 and 1.5 m drop height groups, respectively, at 2 weeks post impact. Serum IGF-I levels were reduced by 18%-32% in mTBI mice compared to control mice at 2 weeks post impact. Serum osteocalcin and IGF-I levels correlated with trabecular BV/TV （r2 = 0.14 and 0.16, P 〈 0.05）. In conclusion, repetitive mTBI exerts significant negative effects on the trabecular bone microarchitecture and bone mechanical properties by influencing osteoblast function via reduced endocrine IGF-I actions.

可数马氏链的截断扩充逼近算法

本文是一篇关于可数马氏链截断扩充逼近算法的综述性文章.截断扩充逼近算法是研究可数无限马氏链的一个有效的方法.它已经成为计算马氏链的平稳分布以及其他参数的关键性工具.本文首先应用截断扩充逼近算法对平稳分布进行研究.我们利用遍历方法以及扰动方法,分别给出在全变差范数意义下以及在V范数意义下的平稳分布的收敛性和误差界.其次,本文应用截断扩充逼近算法研究泊松方程的解.我们给出泊松方程的解的收敛性质,并且考虑中心极限定理中偏差常数的逼近算法.此外,我们将用一些实际的例子来验证这些结果的实用性与准确性.最后,本文对截断扩充逼近算法的一些延伸问题进行了总结与展望.

Heat Transfer with Viscous Dissipation in Couette-Poiseuille Flow under Asymmetric Wall Heat Fluxes

Analytical solutions of temperature distributions and the Nusselt numbers in forced convection are reported for flow through infinitely long parallel plates, where the upper plate moves in the flow direction with constant velocity and the lower plate is kept stationary. The flow is assumed to be laminar, both hydro-dynamically and thermally fully developed, taking into account the effect of viscous dissipation of the flowing fluid. Both the plates being kept at specified and at different constant heat fluxes are considered as thermal boundary conditions. The solutions obtained from energy equation are in terms of Brinkman number, dimensionless velocity and heat flux ratio. These parameters greatly influence and give complete understanding on heat transfer rates that has potentials for designing and analyzing energy equipment and processes.

IPDDF:an improved precision dense descriptor based flow estimation

Large displacement optical flow algorithms are generally categorised into descriptor-based matching and pixel-based matching.Descriptor-based approaches are robust to geometric variation,however they have inherent localisation precision limitation due to histogram nature.This work presents a novel method called improved precision dense descriptor flow(IPDDF).The authors introduce an additional pixel-based matching cost within an existing dense Daisy descriptor framework to improve the flow estimation precision.Pixel-based features such as pixel colour and gradient are computed on top of the original descriptor in the authors’matching cost formulation.The pixel-based cost only requires a light-weight pre-computation and can be adapted seamlessly into the matching cost formulation.The framework is built based on the Daisy Filter Flow work.In the framework,Daisy descriptor and a filter-based efficient flow inference technique,as well as a randomised fast patch match search algorithm,are adopted.Given the novel matching cost formulation,the framework enables efficiently solving dense correspondence field estimation in a high-dimensional search space,which includes scale and orientation.Experiments on various challenging image pairs demonstrate the proposed algorithm enhances flow estimation accuracy as well as generate a spatially coherent yet edge-aware flow field result efficiently.

Quantal studies of sodium 3p ← 3s photoabsorption spectra perturbed by ground lithium atoms

The pressure broadening in the far wings, where the sodium Na(3 p ← 3 s) resonance line is perturbed by ground lithium Li(2 s) atoms, has been theoretically analyzed. The NaLi potential–energy curves and the transition dipole moments are constructed by using a reliable ab initio data points to carry out the reduced-absorption coefficients k_r(ν, T). This quantum-mechanical investigation have demonstrated that the NaLi profile spectra show a satellite future in the red wing at wavelength λ = 685 nm in the temperature range 4000 K–1.8 × 10~4 K. The computation could also exhibit a second satellite, in the blue wing, near the wavelength λ = 574 nm beyond 6000 K and a third peak located at λ = 490 nm which begins to appear at 1.8 × 10~4 K.

Dimensional Stability Properties of Medium Density Fibreboard (MDF) from Treated Oil Palm (Elaeis guineensis) Empty Fruit Bunches (EFB) Fibres

The aim of the study was to investigate the effect of pre-treatments by using sodium hydroxide (NaOH) and acetic acid on oil palm Empty Fruit Bunch (EFB) fibres for the production of Medium Density Fibreboard (MDF). The EFB fibres were treated with chemicals in the concentration range of 0.2%, 0.4%, 0.6% and 0.8% prior to refining. Single-homogenous layer MDF with 12 mm thickness and density of 720 kg/m3 was produced. Urea-Formaldehyde (UF) was applied at 10% loading (based on dry weight of dry fibres) as a binder. The physical properties (Water Absorption (WA) and Thickness Swelling (TS)) of the produced panels were tested according to European Standard, EN 622-5:2006. The results show that types of chemical used had greater effects than concentration on the dimensional stability of the MDF. EFB fibres treated with acetic acid produced MDF with better dimensional stability compared to the MDF NaOH treated fibres. High concentration of NaOH produced poor dimensional stability in the panels.

Quasilinear Degenerated Elliptic Systems with Weighted in Divergence Form with Weak Monotonicity with General Data

We consider, for a bounded open domain Ω in Rn and a function u : Ω → Rm, the quasilinear elliptic system: (1). We generalize the system (QES)(f,g) in considering a right hand side depending on the jacobian matrix Du. Here, the star in (QES)(f,g) indicates that f may depend on Du. In the right hand side, v belongs to the dual space W-1,P’(Ω, ω*, Rm), , f and g satisfy some standard continuity and growth conditions. We prove existence of a regularity, growth and coercivity conditions for σ, but with only very mild monotonicity assumptions.

Multiple hashes of single key with passcode for multiple accounts

A human's e-life needs multiple offline and online accounts. It is a balance between usability and security to set keys or passwords for these multiple accounts. Password reuse has to be avoided due to the domino effect of malicious administrators and crackers. However,human memorability constrains the number of keys. Single sign-on server,key hashing,key strengthening and petname system are used in the prior arts to use only one key for multiple online accounts. The unique site keys are derived from the common master secret and specific domain name. These methods cannot be applied to offline accounts such as file encryption. We invent a new method and system applicable to offline and online accounts. It does not depend on HTTP server and domain name,but numeric 4-digit passcode,key hashing,key strengthening and hash truncation. Domain name is only needed to resist spoofing and phishing attacks of online accounts.

Channel Estimation for Powerline MC-CDMA System

Successful development of broadband over powerline is obviously a potential solution for wired communication systems with the existence of the powerline network. From past research, it is known that the powerline channel suffers from multipath fading, frequency selectivity and also impulsive noise. Multi Carrier Code Division Multiple Access (MC-CDMA) is a promising solution for an impulsive noise powerline channel. This paper starts with the MC-CDMA transmitter structure and focuses on powerline channel model, noise model and various types of available channel estimators. The main concern in Powerline Communication Systems is the existence of impulsive noise. The proposed pilot assisted channel estimation uses the modified least square estimator that reduces the effect of impulsive noise in the estimated channel impulse response.

Implementation of a Telechemotherapy Module in the Peruvian Jungle with Adequate Quality of Life:Breaking the Access Gaps to Health with Teleoncology

Background: Cancer is a leading cause of death worldwide as well as in Peru. The national cancer plan includes decentralization, but one of the greatest barriers is our complicated geography. San Martin is a department located in the Peruvian jungle where there are no public services for cancer care. Our aim was to implement a “distance telemedicine-enabled” outpatient chemotherapy module, monitored by oncologists. Methods: The implementation was conducted in 3 stages: 1) Planning and Organization: working teams were formed, a chemotherapy room was developed and people were trained. 2) Execution: patients from San Martín region, aged >18 years with pathological confirmation of cancer, requiring systemic chemotherapy, ECOG <3, and first course of chemotherapy received at INEN without adverse reaction were selected. 3) Evaluation: adverse events, cost-user evaluation and quality of life (QoL) were assessed. Results: By November 2015, a module with a chemotherapy room with 18 chairs, a pharmacy, a hospitalization room, 1 medical office, a training room, a nutrition area, and a nursing station was implemented. 3 physicians, 3 nurses and 1 pharmacist were trained. Through March 2018, 501 sessions of teleoncology were completed to deliver 232 cycles of chemotherapy for 56 patients aged 19 - 78 years with different solid tumors, with no serious adverse event, without negatively affecting their QoL, and with an average out-of-pocket expense saving of 500 PEN. Conclusions: Using information and communication technology, a telechemotherapy module was successfully implemented in the Peruvian jungle, without adversely affecting the QoL of patients. Neither patients nor family members needed to travel to Lima to receive chemotherapy. This first program can be replicated in other rural and remote regions through non-specialized personnel and facilities, providing chemotherapy services equivalent to a tertiary center through trained health care professionals, supported through telemedicine.

RESEARCH ANNOUNCEMENTS Galois Correspondence in Field Algebra of G-spin Mode

A C*-system is a pair(B,G)consisting of a unital C*-algebra B and a continuotts

STRONGLY NONLINEAR VARIATIONAL PARABOLIC EQUATIONS WITH p(x)-GROWTH

We study the Dirichlet problem associated to strongly nonlinear parabolic equations involving p（x） structure in W;L;（Q）. We prove the existence of weak solutions by applying Galerkin’s approximation method.

L^(2)-CONVERGENCE TO NONLINEAR DIFFUSION WAVES FOR EULER EQUATIONS WITH TIME-DEPENDENT DAMPING

In this paper,we are concerned with the asymptotic behavior of L^(∞) weak-entropy solutions to the compressible Euler equations with a vacuum and time-dependent damping-m/(1+t)^(λ).As λ∈(0,l/7],we prove tht the L^(∞) weak-entropy solution converges to the nonlinear diffusion wave of the generalized porous media equation(GPME)in L^(2)(R).As λ∈(1/7,1),we prove that the L^(∞) weak-entropy solution converges to an expansion around the nonlinear diffusion wave in L^(2)(R),which is the best asymptotic profile.The proof is based on intensive entropy analysis and an energy method.

Renormalized Solutions for Nonlinear Parabolic Systems with Three Unbounded Nonlinearities in Weighted Sobolev Spaces

We prove an existence result without assumptions on the growth of some nonlinear terms, and the existence of a renormalized solution. In this work, we study the existence of renormalized solutions for a class of nonlinear parabolic systems with three unbounded nonlinearities, in the form { b1（x,u1）/ t-div（a（x,t,u1,Du1））＋div（Ф1（u1））＋f1（x,u1,u2）=O in Q, b2（x,u2）/ t-div（a（x,t,u2,Du2））＋div（Ф2（u2））＋f2（x,u1,u2）=O in Q in the framework of weighted Sobolev spaces, where b（x,u） is unbounded function on u, the Carath6odory function ai satisfying the coercivity condition, the general growth condition and only the large monotonicity, the function Фi is assumed to be continuous on ]R and not belong to （Lloc1（Q））N.