Retrieving chlorophyll content and equivalent water thickness of Moso bamboo(Phyllostachys pubescens) forests under Pantana phyllostachysae Chao-induced stress from Sentinel-2A/B images in a multiple LUTs-based PROSAIL framework

Biochemical components of Moso bamboo(Phyllostachys pubescens)are critical to physiological and ecological processes and play an important role in the material and energy cycles of the ecosystem.The coupled PROSPECT with SAIL(PROSAIL)radiative transfer model is widely used for vegetation biochemical component content inversion.However,the presence of leaf-eating pests,such as Pantana phyllostachysae Chao(PPC),weakens the performance of the model for estimating biochemical components of Moso bamboo and thus must be considered.Therefore,this study considered pest-induced stress signals associated with Sentinel-2A/B images and field data and established multiple sets of biochemical canopy reflectance look-up tables(LUTs)based on the PROSAIL framework by setting different parameter ranges according to infestation levels.Quantitative inversions of leaf area index(LAI),leaf chlorophyll content(LCC),and leaf equivalent water thickness(LEWT)were derived.The scale conversions from LCC to canopy chlorophyll content(CCC)and LEWT to canopy equivalent water thickness(CEWT)were calculated.The results showed that LAI,CCC,and CEWT were inversely related with PPC-induced stress.When applying multiple LUTs,the p-values were<0.01;the R2 values for LAI,CCC,and CEWT were 0.71,0.68,and 0.65 with root mean square error(RMSE)(normalized RMSE,NRMSE)values of 0.38(0.16),17.56μg cm-2(0.20),and 0.02 cm(0.51),respectively.Compared to the values obtained for the traditional PROSAIL model,for October,R2 values increased by 0.05 and 0.10 and NRMSE decreased by 0.09 and 0.02 for CCC and CEWT,respectively and RMSE decreased by 0.35μg cm-2 for CCC.The feasibility of the inverse strategy for integrating pest-induced stress factors into the PROSAIL model,while establishing multiple LUTs under different pest-induced damage levels,was successfully demonstrated and can potentially enhance future vegetation parameter inversion and monitoring of bamboo forest health and ecosystems.

一种基于Hierarchy LUT的可重构S-box实现方法

基于查找表方法构建的Substitution box (S-box)在可重构分组密码实现中广泛使用,然而因消耗的资源过大,其面积利用效率低。为提高可重构S-box面积利用效率,提出一种基于4R/1W存储结构的分层查找表(Hierarchy LUT),构建可重构S-box。所提出的4R/1W存储结构能减少存储单元的例化数量,提高存储密度。在40nmCMOS工艺下,实现基于HierarchyLUT的可重构S-box,其面积利用效率得到改善,对比TableLookupUnit (TLU)和Memory Sharing的可重构S-box方案,效率分别提高了51.76%和6.88%。

SMPDP等效电路模型的建立

等效电路模型研究方法是继流体力学模型研究方法之后,又一研究等离子体显示屏工作特性的重要手段,建立准确而简练的等效电路模型是实现此研究方法的前提和根本。本文研究了荫罩式等离子体显示屏(SMPDP)放电单元在气体放电前后工作特性的变化,提出了适用于SMPDP的等效电路模型。它主要由电容网络和晶闸管器件组成,能直接应用在电路模拟仿真软件中并得到与实际SMPDP工作特性相似的结果,为今后进一步研究和改进SMPDP提供了简便和有效的途径。

驱动时序设计中影响SMPDP显示亮度的相关因素研究

等离子体显示屏的显示亮度除了受其本身的发光单元结构设计、制造工艺和荧光粉材料等因素的影响 ,其驱动方案及电路系统设计中的若干参数调整也会对其实际性能产生影响。本文通过对驱动时序方案中可能影响 SMPDP亮度指标的因素进行分析和实验 ,指出了寻址速度和维持脉冲频率两大因素对显示屏亮度指标的核心影响 ,并讨论了如何利用该结果改进驱动时序参数设计从而提高

SMPDP自动功耗调整方法的设计

本文提出了一种针对荫罩型等离子体显示屏 ( SMPDP)的自动功耗调整功能实现方法。该方法首先计算当前帧的视频图像信号输入亮度等级 ,然后通过比较处理和查表得到显示该帧采用的维持脉冲个数 ,并将该信息输出到行驱动波形发生器 ,从而实现系统有效功耗随显示图像的自动调整功能。其中查表时参考的是一条按 SMPDP显示性能优化的输入信号亮度等级与维持脉冲个数非线性关系曲线。该方法能在提高 SMPDP的峰值亮度的同时 ,将整机功耗稳定在一个比较安全的范围内 。

SMPDP放电单元中荧光粉层对放电特性的影响

本文采用流体模型 ,计算了新型荫罩式PDP(SMPDP)放电单元的放电特性。研究了放电单元中荧光粉层的厚度对放电过程和着火电压的影响。模拟结果表明 ,在SMPDP结构中 ,荧光粉层厚度的变化 ,对放电过程的影响小于通常的表面放电型PDP(ACCPDP)。最低着火电压随荧光粉层厚度的不同变化较小。因此 ,SMPDP结构中 。

新型SMPDP菱形单元结构的研究

为了提高等离子体显示单元的亮度和放电效率,本文采用三维流体模型对新型荫罩式等离子体显示板(SMPDP)的菱形单元结构进行了优化。研究了放电单元中的荫罩小孔结构改变对寻址期和维持期放电的影响。详细分析了小孔取向平行寻址电极和垂直寻址电极条件下电场和壁电荷的分布,以及对寻址时间、真空紫外辐射量和放电效率的影响。模拟结果表明:当小孔垂直寻址电极、长度和宽度分别为240μm和120μm时为最佳结构,通过优化小孔结构可以获得较高的寻址速度和放电效率,又可保证荧光粉的涂覆面积。

SMPDP中荧光粉层制备方法的对比与研究

荫罩式等离子体显示器(SMPDP)是一种由金属荫罩板代替传统障壁的新型PDP。针对SMPDP结构的特殊性,讨论了丝网印刷法和喷涂法制备荧光粉层的制作工艺,并对比其优劣。实验结果表明:采用喷涂方法可以在SMPDP的荫罩孔内壁制备致密、均匀的荧光粉层,与掩膜配合使用,可在荫罩上制备三基色荧光粉,满足SMPDP实现彩色的需要。因此,喷涂方法是制备SMPDP三基色荧光粉层行之有效的最佳途径。

两种新型SMPDP驱动波形下的列电压动态范围的研究

荫罩式等离子体显示器(SMPDP)是一种由金属荫罩板代替传统绝缘障壁的新型PDP。本文以42寸SMPDP为实验平台,提出了两种基于CLEAR驱动原理的新型驱动波形:窄脉冲擦除寻址波形、维持斜坡擦除波形,并分别对这两种波形下的列数据电压(Va)的动态范围作了相应测量和分析,从而得出维持斜坡擦除波形在改善SMPDP的发光一致性和均匀性上有明显优势,有助于提高SMPDP的驱动性能。

具有小间距和高解析度的25英寸SMPDP

最近具有小间距和高解析度的25英寸的SMPDP被作为34英寸SMPDP的后续产品发展起来，已经在ASID04′会议上展出。SMPDP最有希望做成低价的PDP。0．66mm新的象素尺寸用于SVGA解析度的25英寸SMPDP，也可以兼容应用到42寸全高清解析度的SMPDP。设计和应用三角形排列的放电单元，可提供更多显示区域且易于制作。其他修改，如公共电极结构和基板玻璃的材料选择，已被测试。25英寸SMPDP的性能最高亮度达到500cd／m2，总功耗为100W。

Silodosin is effective for treatment of LUTS in men wii BPH： a systematic review

The aim of this study was to systematically review the evidence on the efficacy and safety of silodosin treatments on lower urinary tract symptoms （LUTS） in men with benign prostatic hyperplasia （BPH） from randomized controlled trials. We searched PubMed （1966- December 2011）, Embase （1974-December 2011） and the Cochrane Library Database （2011, Issue 12）. The assessed outcome measures were the change from baseline for the International Prostate Symptom Score （IPSS）, quality of life （QoL） score, peak urine maximum flow rate （Qmax）, QoL related to urinary symptoms and adverse effects. Two authors independently assessed the study quality and extracted data. All data were analysed using RevMan 5.1. The meta-analysis included four randomized controlled trials with a total of 2504 patients. The study durations were each 12 weeks. At the follow-up end points, the pooled results showed that the change from baseline for the silodosin group was significantly higher than the placebo group for the IPSS, QoL score and Qmax（mean difference （MD）=-2.78, P〈O.O0001; MD=-O.42, P--O.O04; MD= 1.17, P〈O.OOOOl,respectively） and patients felt more satisfied with QoL related to urinary symptoms in the silodosin group than the placebo group. Ejaculation disorder was the most commonly reported adverse effect. The pooled results also showed that the silodosin group was superior to the 0.2 mg tamsulosin group with respect to the IPSS and QoL score （IPSS： MD=- 1.14, P=O.02; QoL score： MD=-0.26, P=O.02） and inferior to the 0.2 mg tamsulosin group with respect to Qmax （MD=-0.85, P=O.01）. In contrast, there was no significant difference in the incidence of ejaculation disorder and dizziness between the silodosin and 0.2 mg tamsulosin groups. The current meta-analysis suggested that silodosin is an effective therapy for LUTS in men with BPH and is not inferior to 0.2 mg tamsulosin.

Petrochemical Characteristics and Timing of Middle Eocene Granitic Magmatism in Kooh-Shah, Lut Block, Eastern Iran

The Kooh-Shah region located in a Tertiary volcanic-plutonic belt of the Lut Block in eastern Iran comprises several subvolcanic intermediate to acidic intrusive rocks, diorite to syenite in composition, which have intruded into volcanic rocks. The Kooh-Shah granitoid rocks are characterized by enrichment in large ion-lithophile elements （LILE： e.g. Sr, Ba, Rb） and depletion in high field-strength elements （HFSE： e.g. Nb, Ta, Ti）. The chondrite-normalized REE patterns are characterized by moderate LREE enrichment （La/Yb）N=6.01-10.01, medium-heavy REE enrichment, and absence of Eu anomalies. The Kooh-Shah intrusive rocks are metaluminous, shoshonitic with calc-alkaline affinity and high values of magnetic susceptibility, and classified as the magnetite-series of oxidant I-type granitoids. The age of Kooh-Shah granitoid rocks based on zircon U-Pb age dating is 39.7±0.7 Ma （=Middle Eocene） and the ranges of their initial 87Sr/86Sr and 143Nd/144Nd ratios are from 0.704812 to 0.704920 and 0.512579 to 0.512644, respectively, when recalculated to an age of 39 Ma. The initial ？Nd isotope values for the Kooh-Shah intrusive rocks range from -0.18 to 1.09. This geochemical data indicates that the Kooh-Shah granitoid rocks formed from depleted mantle in an island arc setting. The geochemical signature of the studied granitoid rocks represents a characteristic guide for future exploration of copper-gold porphyry-type deposits in the Lut block.

矩阵排列型SMPDP等效电路模型的改进

现有荫罩式等离子体显示屏(SMPDP)等效电路模型的建立,是基于所有像素特性一致,同时工作状态相同的假设,因此在其仿真应用中存在局限性。文章在原模型基础上进行了改进设计,提出了多放电单元矩阵排列式等效电路模型。该模型在原电路模型的基础上增加了寻址电极驱动IC和数据电极驱动IC电路,同时复制了多个放电单元等效电路模型。该模型在实现原等效电路模型各项仿真功能的基础上,还能实现原模型所不及的仿真功能,例如寻址期工作特性仿真、像素单元特性不一致对整屏性能的影响、相邻像素之间相互影响等。通过在PSpice环境下对矩阵排列型等效电路模型的系统工作特性仿真,所得结果与实验测试结果基本一致,因此该模型具有良好的等效替代性,适用于今后对SMPDP的系统设计与优化。

Dasht-e Lut in Iran, the Most Complete Collection of Beautiful Geomorphological Phenomena of Desert

Given special tectonic and climatic conditions, Iran has the most diverse land-forms and beautiful geological phenomena, which could attract many scientific, adventurous tourists and geological researchers. The present study aims at studying and introducing wonderful geomorphological attractions and numerous geotourism potentials of very hot paradise of the earth, e.g. Dasht-e Lut of Iran, a desert which contains a collection of exclusive desert relieves and geological and geomorphological records of the world. Such unique perspectives as the biggest Nebkhas of the world, the largest Yardangs or Kaluts of the world, the hottest point of the earth, as well as rare species of desert structures such as salt marshes and salt polygons, Gandom Beryan Hill, massive sand dunes, Barchans, clay zones in pretty shapes, saline river , etc., present a vast and diverse extension of geographical beauties and phenomena of the desert. Using library studies, interpretation of satellite images and field studies, this study has been conducted. The results of the studies show that Lut Desert has considerable capability for carrying out complementary studies as well as effect on economic development process in national and international levels. In addition, geotourism development obstacles in Lut Desert are identified, and such solutions as development of ways for access to attractions, erection of geotourism development centers, advertisement and introduction of the desert's attractions, dispatch of guides with tourists, promotion of the region security, extension of accommodations and… for better use of the potentials of the desert, are provided. Furthermore, towards developing the region geotourism, some other fun and exciting activities such as sand skiing, racings and desert rallies, endurance cycling, sun bath, star observation, camel riding and so on, are suggested. Obviously, having various desert attractions and multiple geotourism potentials, Dasht-e Lut has the capability of being considered among global geoparks of UNESCO.

ARGOS LUT运行软件的分析与改进 (二)浮标数据归档模块的分析、改进及运行软件的编译

本文在分析ARGOS系统地面站(VHF LUT)软件的“浮标数据归档模块”的基础上,介绍了针对实际工作中发现的问题对原模块所作的一系列改进,以及对原软件所进行的编译。由于这些工作,目前 VHF LUT 处理信息的速度已大大加快,接收数据的数量明显增多,质量显著提高,获得了比较满意的使用效果。

ARGOS LUT运行软件的分析与改进——(一)数据收集模块的分析与改进

我国在1986年引进的ARGOS系统地面站(VHF LuT)只能接收 NOAA—10及其前卫星转发的信息,无法接收1988年秋发射的、改变了传输格式的 NOAA—11转发的信息。为了解决这个问题,本文对 LUT 原有软件的“数据收集模块”进行了深入的分析,比较了 NOAA—10与 NOAA—11传输的数据,找出了其中的规律,并据之改进了原来的机器语言代码程序,使现有的 LUT 也能接收 NOAh—11转发的信息.这项成果不仅可供目前国内其它 LUT 工作人员参考,而且为今后分析 NOAA 系列卫星新的数据传输格式摸索了路子。

Mineralogy, Geochemistry, Fluid Inclusion and Oxygen Isotope Investigations of Epithermal Cu±Ag Veins of the Khur Area, Lut Block,Eastern Iran

The Khur metallogenic district is located in a volcanic-plutonic belt in the central Lut Block(central eastern Iran). Mineralization occurs in Middle Eocene andesitic tuff and along four main vein systems trending northwest-southeast(Shurk, Mir-e-Khash, Shikasteh Sabz and Ghar-e-Kaftar veins).Microscopic studies reveal that the veins contain bornite, chalcocite, pyrite, tennantite together with minor sphalerite and chalcopyrite as hypogene minerals and chalcocite, digenite, covellite, valleriite,malachite, azurite, atacamite, hematite, and goethite as supergene minerals. The ore bodies are accompanied by narrow but intensely developed wall rock alterations of argillization, carbonatization and silicification. Copper content reaches 6.5, 2.4, 4.2 and 5% in Mir-e-Khash, Shikasteh Sabz, Ghar-eKaftar and Shurk, respectively. Microthermometric measurements of quartz-and calcite-hosted fluid inclusions indicate that the mineralization might be derived from a moderately saline hydrothermal fluid at temperatures between 175-316℃. Calculated δO values of water in equilibrium with quartz and calcite for Khur veins suggest that the fluid might have had a magmatic source, but theO-depletion was developed through mixing with meteoric water. Copper deposition in Khur veins is believed to have been largely caused by mixing, although wall rock reactions may also have occurred. The Khur veins are classified as volcanic-subvolcanic hydrothermal-related vein deposits.

Area and Speed Efficient Implementation of Symmetric FIR Digital Filter through Reduced Parallel LUT Decomposed DA Approach

This brief proposes an area and speed efficient implementation of symmetric finite impulse response (FIR) digital filter using reduced parallel look-up table (LUT) distributed arithmetic (DA) based approach. The complexity lying in the realization of FIR filter is dominated by the multiplier structure. This complexity grows further with filter order, which results in increased area, power, and reduced speed of operation. The speed of operation is improved over multiply-accumulate approach using multiplier less conventional DA based design and decomposed DA based design. Both the structure requires B clock cycles to get the filter output for the input width of B, which limits the speed of DA structure. This limitation is addressed using parallel LUTs, called high speed DA FIR, at the expense of additional hardware cost. With large number of taps, the number of LUTs and its size also becomes large. In the proposed method, by exploiting coefficient symmetry property, the number of LUTs in the decomposed DA form is reduced by a factor of about 2. This proposed approach is applied in high speed DA based FIR design, to obtain area and speed efficient structure. The proposed design offers around 40% less area and 53.98% less slice-delay product (SDP) than the high throughput DA based structure when it’s implemented over Xilinx Virtex-5 FPGA device-XC5VSX95T-1FF1136 for 16-tap symmetric FIR filter. The proposed design on the same FPGA device, supports up to 607 MHz input sampling frequency, and offers 60.5% more speed and 67.71% less SDP than the systolic DA based design.

3D LUT生成与转换系统的设计与实现

在电影工业领域,三维颜色查找表(3D LUT)对于还原正常监看关系、风格化调色起着至关重要的作用。针对传统3D LUT软件功能不均衡、学习使用成本高、智能化程度低等问题,本文基于Python和Qt开发了一款3D LUT生成与转换系统。以标准色彩图(HALD)为核心设计LUT编辑、色彩空间转换、一级校色、第三方软件对接、辅助查看五个功能模块,从智能化处理分析和跨程序数据交换方面拓展了功能。系统功能完善、美观易用、可跨平台,减轻了用户负担,释放调色师的创造力。

Mathematical and statistical modeling of morphometric and planar parameters of barchans in Pashoeyeh Erg in the west of Lut Desert,Iran

Barchan dunes are among the most common accumulative phenomena made by wind erosion,which are usually formed in regions where the prevailing wind direction is almost constant throughout the year and there is not enough sand to completely cover the land surface.Barchans are among the most common windy landscapes in Pashoueyeh Erg in the west of Lut Desert,Iran.This study aims to elaborate on morphological properties of barchans in this region using mathematical and statistical models.The results of these methods are very important in investigating barchan shapes and identifying their behavior.Barchan shapes were mathematically modeled by simulating them in the coordinate system through nonlinear parabolic equations,so that two separate equations were calculated for barchan windward and slip-face parabolas.The type and intensity of relationships between barchan morphology and mathematical parameters were determined by the statistical modeling.The results indicated that the existing relationships followed the power correlation with the maximum coefficient of determination and minimum error of estimate.Combining the above two methods is a powerful basis for stimulating barchans in virtual and laboratory environments.The most important result of this study is to convert the mathematical and statistical models of barchan morphology to each other.Focal length is one of the most important parameters of barchan parabolas,suggesting different states of barchans in comparison with each other.As the barchan's focal length decreases,its opening becomes narrower,and the divergence of the barchan's horns reduces.Barchans with longer focal length have greater width,dimensions,and volume.In general,identifying and estimating the morphometric and planar parameters of barchans is effective in how they move,how much they move,and how they behave in the environment.These cases play an important role in the management of desert areas.