地波超视距雷达干扰电台来波极化方向的测试误差及消除

本文在同一坐标下给出了具有极化滤波特性的地波超视距雷达双极化天线的方向函数,指出了干扰电台来波极化方向测试误差的来源,并重点讨论了由垂直极化与水平极化天线方向图及有效高度不同给干扰电台来波极化方向测试带来的误差,并提出了对这些误差进行估计和消除的方法.     

STUDY ON THE COLLOID CHEMISTRY BEHAVIOR IN THE ONP DEINKING SYSTEM

1.INTRODUCTIONWith the great rising of secondary fiber in today’s paper market, people has been paying more and more attention to the technology of recycling the secondary fiber. However, in today’s world, the basal study of waste paper deinking is not enough. People lack the systemic cognition of different secondary fiber’s recycling. In this paper, from study on the physical-chemistry behavior in the DIP, we mainly researched the colloid chemical behavior of the pulp coarse disper…     

老年性痴呆症患者的心理呵护与膳食营养调治

老年性痴呆症患者真正需要亲人的关爱，从病人心理健康入手，家庭尽责、尽心、尽力，加强心理呵护；通过心理干预，合理调理膳食均衡，加强康复锻炼，以期达到延长寿命，提高生活质量的目的。     

（HgCd）Te探测器的光吸收系数对其有效Franz—Keldysh偏移的影响

在讨论（ＨｇＣｄ）Ｔｅ探测器耗尽层宽ｄ和光吸收系α的基础上，导出了探测器截止波长的有效Ｆｒａｎｚ－Ｋｅｌｄｙｓｈ偏低Δλｃｅ与α、ｄ的关系式，说明了实验测定的Δλｃｅ偏低的原因。     

现象学技术哲学及其发展趋势

现象学是现代技术哲学研究的主要理论基础。海德格尔着眼于对技术的形而上的分析，伯格曼和伊德则实现了技术哲学的经验转向，克努斯和斯蒂格勒在现象学方法的基础上提出了研究技术的两条新的路径。有别于海德格尔对技术本质纯粹形而上的追问，当代技术哲学转向与其他学科相结合，利用其他学科研究成果，从伦理、政治、工程和日常生活等多个角度展开对技术的研究。     

Scheme of adaptive polarization filtering based on Kalman model

1.INTRODUCTIONIn modern high technology war,the electroniccounter measures(ECM)and precise guidance tech-nology are rapidly developed and becoming the re-search hotspot of militarysciencefor all the countries.The guidance missiles are the main weapons andhigher anti-jamming ability and guidance precision arerequired for guidance radar.For the active mono-pulse guidance radar,the angle information of thetarget is obtained by usingthe angle measured methodof amplitude sum/difference or pha…     

入世过渡期后我国电冰箱服务业的竞争策略分析

入世过渡期后电冰箱服务业将结束保护期,全面对外开放,我国企业应实施提高技术水平,形成竞争实力;转换经营机制,健全服务网络;充分利用本土文化优势,提高信誉度;完善管理信息系统,提高物流调控的有效性等一系列竞争策略,应对挑战。     

Conditional automaticity in retrieving multiplication facts: Evidence from Chinese

Adults automatically retrieve multiplication facts in a number matching task, in which participants judge whether the target number is one of the two cue digits presented previously. They are slower in rejecting the number which is the sum or the product of cues than a neutral number. The present study explored, with Chinese adult participants, whether such automaticity in retrieving multiplication facts can be affected by experiential and experimental factors such as learning experience and task set. We classified cue digits into two categories: small number first (the ascending order) and large number first (the descending order), according to whether the smaller or larger digit was presented on the left of the other. Experiment 1 found that product numbers were more difficult to reject than non-product numbers. Moreover, the order of cues played a role in modulating the magnitude of the interference effect, with ascending order conditions having larger interference than descending order conditions. Experiment 2 added a task-irrelevant addition or subtraction sign between the two cues and replicated the pattern of effects in Experiment 1, although the interference effects were significantly reduced. Experiment 3 instructed participants to judge whether the target number was the sum of the two cue digits. No interference effect was found for the target that was the product of cues. These findings suggest that the retrieval of multiplication facts, albeit automatic, can be influenced by learning experience (cue order effects in Experiments 1 & 2), the compatibility of the cuing context with the stored template information (reduced interference effects across Experiments 1 & 2), and task set (elimination of interference effects in Experiment 3). Retrieving multiplication facts is therefore conditionally automatic.     

土壤和沉积物中1,2,4-三氯苯的超声波提取

以土壤和沉积物中的1,2,4-三氯苯为研究对象,应用超声波提取并以气相色谱进行定量分析。研究结果表明：在一定的超声波处理条件下,1,2,4-三氯苯较为稳定且降解比率很小;最适宜的超声波提取条件为：超声波功率20W、提取温度35℃、提取时间60min、提取剂为石油醚-丙酮混合溶剂(体积比1：1);三种不同提取方法(索氏、振荡和超声波)相比较以超声波提取法最优;该方法的平均回收率为92．18％、变异系数0．82%、检测限0．000μg／g,可满足土壤中微量有机物定量分析要求。     

Fermentation of xylose to produce ethanol by recombinant <Emphasis Type="Italic">Saccharomyces cerevisiae</Emphasis> strain containing <Emphasis Type="Italic">XYLA</Emphasis> and <Emphasis Type="Italic">XKS1</Emphasis>

Fermentation of the pentose sugar xylose to produce ethanol using lignocellulosic biomass would make bioethanol production economically more competitive. Saccharomyce cerevisise, an efficient ethanol producer, cannot utilize xylose because it lacks the ability to convert xylose to its isomer xylulose. In this study, XYLA gene encoding xylose isomerase (XI) from Thermoanaerobacter tengcongensis MB4T and XKS1 gene encoding xylulokinase (XK) from Pichia stipitis were cloned and functionally coexpressed in Saccharomyces cerevisiae EF-326 to construct a recombinant xylose-utilizing strain. The resulting strain S. cerevisiae EF 1014 not only grew on xylose as sole carbon source, but also produced ethanol under anaerobic conditions. Fermentations performed with different xylose concentrations at different temperatures demonstrated that the highest ethanol productivity was 0.11 g/g xylose when xylose concentration was provided at 50 g/L. Under this condition, 28.4% of xylose was consumed and 1.54 g/L xylitol was formed. An increasing fermentation temperature from 30℃ to 37℃ did not improve ethanol yield.