梳理机用高转移率金属针布齿条研发与应用

为提高非织造布罗拉梳理机金属针布握持、转移纤维能力,避免在梳理过程中出现不抓棉、掉网、飞花、内凝聚辊缠棉的问题,分析研发的3类高转移率金属针布齿条的齿形结构及型号,并在浙江、安徽使用不同梳理机对不同品种纤维进行试纺。结果表明:高转移率金属针布齿条齿形设计基本合理,对纤维的抓取、控制能力增强,梳理和转移效果提高,适用于包卷中道夫、道夫、工作辊和外凝聚辊。

Wistar大鼠高转移率肝癌模型

目的制备转移率较高的诱发性肝癌大鼠模型。方法取40只130~150 g雄性Wistar大鼠,按100 mg/kg腹腔注射二乙基亚硝胺（diethylnitrosamine,DEN）,100 ppm N-亚硝基吗啉（N-nitrosomorpholine,NMOR）饮水,给大鼠用药。于给药2、4、10、12、14、20周后各取4只大鼠,对其肝脏、肺脏运用苏木精-伊红染色法（hematoxylineosin staining,HE）染色,同时对肝脏进行甲胎蛋白AFP免疫组化分析。结果模型大鼠从第2周起肝脏变黄,10周开始肝脏出现散在小结节,20周多个肝叶出现较大结节,且60%出现肺转移。结论此建模过程成功模拟了人类肝癌发展的三步曲：肝纤维化-肝硬化-肝癌,可作为人类肝癌良好的动物模型。

The Expression and Functional Analysis of the Gene At2G34450 in High Mobility Group B Proteins from Arabidopsis thaliana

[Objective]To better understand the functions of High Mobility Group B （HMGB） proteins in the transcriptional regulation of plant stress responses.[Method]We cloned the At2G33450 gene encoding At2G34450 protein in Arabidopsis thaliana.Binary vectors carrying the above gene were transformed into Arabidopsis to detect the influences of environmental stimuli to transgenic Arabidopsis.[Result] Under salt or drought stress the transgenic Arabidopsis plants over-expressed At2G33450 displayed retarded germination and subsequent growth compared with wild-type plants.[Conclusion]Our results provide a novel basis for understanding the biological functions of HMGB protein family members that differently affect germination and seedling growth of Arabidopsis plants under various stress conditions.

A Valuable System with High Specificity for Evaluating both Metastasis and Prognosis of Oral Squamous Cell Carcinoma

OBJECTIVE A system was established to evaluate the metastasis and prognosis of oral squamous cell carcinoma by analyzing the tumor differentiation, the TNM stage, the mode of invasion, and the expression of E-cadherin and S100A4. METHODS Squamous cell carcinoma of the oral cavity of 86 cases was the focus of our study. In this system, the histopathological grade and the histochemical patterns were estimated on a 0-3 point scale, the total points graded from 0 to 13. RESULTS The incidence of metastasis and prognosis in the cases with total points more than 8 was significantly higher than that with total points less than 7 （P 〈 0.05,χ^2= 22.0658 and P 〈 0.05, χ^2= 10.7047）. The system had a significant higher specificity than that of ＇DIAGS index＇ system （Differentiation, Invasion mode, Adhesion molecules, Glycosaminoglycan, and the Sugar chain） in the evaluation of metastasis （P 〈 0.05, u = 2.2339）. Moreover, the specificity for evaluation of metastasis in the system was significantly higher than that of E-cadherin （P 〈 0.05, u = 2.4996） or S100A4 （P 〈 0.05, u = 2.4289） only. Furthermore the specificity for evaluation of unfavorable prognosis in the system was also significantly higher than that of E-cadherin （P 〈 0.05, u = 2.1313） or S100A4 only （P 〈 0.05, u = 2.0301）. CONCLUSION This is a valuable evaluation system with high specificity to predict metastatic potential and prognosis of oral squamous cell carcinoma.

Statistical Modeling of the High Altitude Platform Dual-Polarized MIMO Propagation Channel

In order to investigate the benefit of multiple-input multiple-output(MIMO) technique applying to the high altitude platform(HAP), a 2×2 MIMO statistical model, which can accurately describe the channel between HAP and high-speed train, is presented. And dual polarization diversity is particularly considered. Based on first-order three-state Markov chain, the single-input single-output(SISO) channel, a subset of the MIMO channel is first established. The ray tracing approach applied to the digital relief model(DRM) which covers the railway between Xi'an and Zhengzhou is used to obtain the state probability vector and matrix of the state transition probability. The proposed model considers both Doppler shift and temporal correlation, and the polarization correlation and spatial correlation statistical properties of large-scale fading and smallscale fading are analyzed. Moreover, useful numerical results on the MIMO HAP channel outage capacity are provided based on which, significant capacity gains with respect to the conventional SISO case are illustrated. Such statistical channel model can be applied to the future wireless communication system between HAP and high-speed train.

Construction management through bot: Taiwan high speed rall case

One of the key elements in real estate management is streamlining the construction process. Thus, the facilities can be built on a faster, cheaper, and higher quality base. Consequently, it will enhance the owner’s competitiveness. Due to the high cost and lengthy duration of mega-construction projects in recent years, Build-Operate-Transfer (BOT) contracts are getting popular in delivering constructed projects in the public sector. With BOT, the public owners are able to focus on the effectiveness of fair resource allocation as well as bring the efficiency of private enterprise into governmental operations. This paper uses Taiwan High Speed Rail project to exemplify the BOT method in executing the constructed projects in the chain of real estate management processes. The paper explains the reasons for building HSR and adopting BOT approach. The detail of the HSR project and the feasibility analysis of the project will be presented in this paper. The feasibility analysis comprises the comparisons of different transportation means, the financial analysis, and other benefits from HSR. Finally, conclusions will be drawn.

Design Consideration for High Power Density GaN Buck-Rectifier in ISOP-IPOS Converter based dc Distribution, System

GaN （gallium nitride） buck-rectifier has been proposed to realize high power density ISOP （input series and output parallel）-IPOS （input parallel and output series） converter-based dc distribution system. The ultra-low loss bi-directional switch can be developed by the GaN power device because of the low on-resistance, the high-speed switching behavior and its own device structure. The buck-rectifier using the GaN bi-directional switches has the potential to achieve higher power density than the commonly utilized boost-rectifier. Availability of the GaN-HEMT （high electron mobility transistor） for the buck rectifier has been verified taking the theoretical limit of the on-resistance and the switching loss energy into account. Design consideration for a high power density buck-rectifier has been also conducted and the application effect of the GaN bidirectional switches has been evaluated quantitatively. The ISOP-IPOS converter-based dc （direct current） distribution system takes full advantage of the buck-rectifier and the rectifier using GaN devices contributes to realizing higher power density dc distribution system.

Furan-based liquid-crystalline small-molecule donor guest improving the photovoltaic performance of organic solar cells with amorphous packing

Introducing liquid-crystalline small-molecule donors(SMDs)into binary systems based on the strong intermolecular interactions of SMDs is a facile and effective strategy to tune the active layer morphology and improve the performance of organic solar cells(OSCs).Contrary to conventional understanding,this research proposes a new strategy for ternary OSCs implicating that"weakly crystalline materials can also optimize the morphology of the active layer and improve the OSCs performance".Herein,we designed and synthesized two liquid-crystalline SMDs,Z1 and Z2,based on benzodifuran(BDF)units.The amorphous Z2-incorporated ternary devices present an unexpectedly improved power conversion efficiency(PCE)>18%with good stability.By contrast,the highly ordered Z1-based ternary devices possess a significantly depressed efficiency.Multiple characterizations reveal that the Z2-based ternary blend films possess improved miscibility and efficient charge transport.This novel strategy for the selection of the third component is significant for the fabrication of high-efficiency ternary OSCs.

Design and heat transfer analysis of a compound multi-layer insulations for use in high temperature cylinder thermal protection systems

Thermal protection systems are very essential for high temperature thermal conductivity measurement system to reduce the heat loss to environment at the range of 600-1800 K. A compound multi-layer insulations structure which composed of inner carbon fibrous materials and outer alternately arranged alumina fibrous materials and high reflectivity foils is proposed for use in high temperature cylinder thermal protection systems. A coupled conductive and radiation governing equations is presented for heat transfer analysis of the structure. The finite volume method and the discrete ordinate method are used to solve the goveming equations. The optimization structure of the compound multi-layer insulations is investigated by considering the pressure of the gas, the density of the carbon fibrous materials, the density of the alumina fibrous materials, the number of reflective foil layers and the emissivity of reflective foils. The results show that the compound structure has the best thermal insulation performance when the pressure of the gas is below 0.01 kPa, the density of carbon fibrous materials is 180 kg m^-3, the density of alumina fibrous materials is 256 kg m^-3 and the number of reflective foil layers is 39. In addition, the thermal insulation performance is much better when the emissivity of reflective foils is lower.