从典型案例影射的中原地区碉楼类民居的抗震价值

通过对中原地区古民居的调研,选取几个典型古民居作为案例,结合碉楼民居特点,对其特征进行细致分析。为了合理诠释中原地区碉楼类民居的抗震价值,基于构造视角,从平面形式、结构布置和抗震构造措施的角度入手,归纳出该类民居的抗震结构特征:①平面形式为塔形;②平面和立面布局规整、均匀;③墙体高厚比合理,门窗洞口少而小;④墙体中设置有拉结石,起到类似拉结钢筋、圈梁和构造柱的作用。     

高层框筒结构正交各向异性等效模型的解析解

基于正交各划性连续化等效模型，将高层框筒结构转换成弹性力学平面应力平板组合结构，并采用应力函数法获得了解析解。     

高层框筒结构的剪力滞

In this paper, the shear-lag effect of the tall frame-shear wall structures is studied with the plane stress theory. The methods and the results given in this paper are very useful to engineers and designers.     

承德地区放线菌物种多样性分布的研究

对采自承德地区南部五县及市区土样共403份,进行了放线菌的分离纯化,并对放线菌的形态、细胞壁化学组分、部分菌株16SrDNA序列进行研究,经初步分析,分离得到的1万余株放线菌,大约95%属于11个已知属。结果表明:承德地区放线菌资源较为丰富,区域地理状况、气候、植被、根系、土壤性质等因素对放线菌的分布有一定的影响,应引起足够重视。     

泵站开敞式进水流道试验研究

本文在实验台试验基础上,提出了泵站开敞式进水池最佳平面形状与适宜的尺寸。当开敞进水流道边界形状与水流流线形状一致时,获得最佳进水池形式为心形或半圆形。喇叭口悬空高合理取值范围为(0.3-0.5)D,后壁距在0.25D以内,临界淹没水深hs<0.8D,进水池池宽采用2.5D时,水泵装置效率可达60.5-60.9％,水泵效率测量综合误差为2.5％。     

曲墙式混凝土衬砌水窖对称面内轮廓线的选形方法

针对传统水窖对大面积集雨需要的局限性,设计了一种曲墙式混凝土衬砌新型水窖,并提出了由集雨量准确确定出其对称面内轮廓线形状的设计计算方法.在设计过程中,根据相关规范确定出该水窖的各个控制点,利用控制点参数建立了水窖对称面内轮廓线的控制方程,最终采用二分法求解出该水窖对称面内轮廓线的形状.算例表明:提出的选形方法可用于实际工程问题的设计计算.对该新型水窖的对称面选形方法的研究,将为今后大面积雨水积蓄设施的设计提供一定的依据.     

纳米涂料对密集烤房烘烤性能及烟叶质量的影响

 研究纳米材料涂抹密集烤房装烟室和加热室内壁对烤房烘烤性能和烟叶质量的影响,为烘烤环境的优化和完善提供理论依据。结果表明：密集烤房的装烟室和加热室内壁涂抹纳米涂料后,烤房内垂直和平面温差分别降低1.5℃和1.7℃,缩短烘烤时间15h,降低烘烤能耗0.32元/kg,提高烤后烟叶上、中等烟叶质量6.2%,均价提高了1.03元/kg,并且明显地改善了上部烟叶外观质量。     

气候影响邵阳房屋朝向、间距的考量

根据太阳在天空中的位置,分析计算了邵阳水平面各墙壁的日照时数、直达辐射量、建筑物阴影、各向墙壁日照时间和冬夏盛行风向等。分析表明:邵阳房屋最佳朝向在正南偏东偏西各15°的范围内,不宜朝西、朝北(东北);起居室、办公室、会议室等,宜安排在南向房间内,楼道、厨房、厕所等,宜安排在北向房间中。     

旅游型村镇住居院落与户型模式设计--以白石山景区村镇住居为例

近年市郊游逐渐成为人们业余生活的重要组成部分,而旅游型村镇住居逐步成为我国一种新型的城镇化居住模式,但在发展中仍存在一定的问题。笔者以白石山景区村镇为例,分析了该地区旅游型村镇住居存在的问题,就旅游型村镇住居单体元素,如平面布局、院落、院门、屋顶、墙身、窗、漏窗的设计提出改进建议,并针对住居院落与户型改建或重建进行多种设计模式探讨。     

Is venus concentrating interplanetary dust toward its orbital plane?

By use of observations of zodiacal light, the symmetry plane or plane of maximum density of interplanetary dust at elongations of 32 degrees to 50 degrees from the sun has been found to be closer to the orbital plane of Venus than to the invariable plane. This suggests that the plane of maximum density in this region is being gravitationally perturbed closer to the orbital plane of Venus.     

双峰驼肩关节、肘关节解剖研究

通过对双峰驼20个关节(左、右肩关节、肘关节各5个)的解剖,发现如下一些特征:肩胛骨关节盂切迹不明显.肱骨远端内侧髁关节面无滑液窝;髁间沟由后向前内侧斜行,其与关状面之间的夹角约为10度。肘关节囊前壁有前斜韧带加强。肘外侧侧副韧带比肘内侧侧副韧带强厚得多,且后者远端没有2个止端.桡尺骨间的产节已基本骨化.     

应用透视仿射对应法解画法几何问题

本文阐述了透视仿射对应法的基本概念,确立的条件、性质、主方向及圆的透视仿射对应图形椭圆等方面问题。列举了利用此法解画法几何中线面的交点;面面的交线;点到线;点到面间的距离等定位和度量问题的实例。     

红松幼苗根际微区pH与N、P、K的梯度分布

采用水平根垫法对2年生红松幼苗进行栽培实验,应用冰冻薄层切片法对距幼苗根面不同距离的土壤进行分层取样,并测定不同层次土壤中pH与有效N、P、K的含量.结果表明,距红松幼苗根面不同距离的土壤中,pH与有效N、P、K均呈有规律的梯度分布,即根际微区pH较土体下降,且距根面越近,pH越低;有效N在根际出现较大的亏缺区,亏缺范围为距根表10 mm以内,最大亏缺率位于距根面5 mm处,而在紧靠根面的土壤中与最大亏缺率相比出现N素的相对累积;有效P在根际土壤中只存在明显的亏缺区,亏缺范围为距根面6 mm以内,距根面0-1 mm亏缺率最大,达30%左右;近根面土壤中有效K浓度出现累积,主要累积范围为距根面0-2 mm,最大累积率约34%,但在距根面4-7 mm又呈现一定程度的亏缺.     

平面COUETTE流动的湍流斑研究

湍流斑是近壁剪切流动中的重要现象,它们的生成和发展与流动转捩和湍流的形成密切相关.采用Navier-Stokes方程直接数值模拟和壁面脉冲模型研究平面Cou-ette流动中湍流斑的生成和演化.高精度高分辨率的三维耦合紧致差分格式被用于数值计算.探讨了平面Couette流动中湍流斑的重要特征,包括高频脉动的形成、雷诺应力的产生、扰动的急剧增长和湍流斑形状的变化,特别是流向涡的复杂演化过程.结果表明层流流动中的湍流斑具有湍流流动中一些基本特征.     

双峰驼腕关节解剖

解剖了双峰驼10个腕关节(左右各5个),发现如下一些特征:前臂骨远端关节面上的两条平行嵴由前向后内側斜行,与矢状面之间的夹角约为15度。腕掌背侧韧带不发达,而掌侧的韧带却很宽厚.副腕骨尺腕骨韧带有2条.桡腕骨与中间腕骨之间,第3、4腕骨之间都有独立的小关节形成,后者有时与腕间关节相通.前臂腕关节囊背侧壁很宽松,在关节伸直时,向背侧可拱起形成高约2.0厘米的褶。     

The orientation of the local interstellar magnetic field

The orientation of the local interstellar magnetic field introduces asymmetries in the heliosphere that affect the location of heliospheric radio emissions and the streaming direction of ions from the termination shock of the solar wind. We combined observations of radio emissions and energetic particle streaming with extensive three-dimensional magnetohydrodynamic computer simulations of magnetic field draping over the heliopause to show that the plane of the local interstellar field is approximately 60 degrees to 90 degrees from the galactic plane. This finding suggests that the field orientation in the Local Interstellar Cloud differs from that of a larger-scale interstellar magnetic field thought to parallel the galactic plane.     

First plasma wave observations at neptune

The Voyager 2 plasma wave instrument detected many familiar plasma waves during the encounter with Neptune, including electron plasma oscillations in the solar wind upstream of the bow shock, electrostatic turbulence at the bow shock, and chorus, hiss, electron cyclotron waves, and upper hybrid resonance waves in the inner magnetosphere. Low-frequency radio emissions, believed to be generated by mode conversion from the upper hybrid resonance emissions, were also observed propagating outward in a disklike beam along the magnetic equatorial plane. At the two ring plane crossings many small micrometer-sized dust particles were detected striking the spacecraft. The maximum impact rates were about 280 impacts per second at the inbound ring plane crossing, and about 110 impacts per second at the outbound ring plane crossing. Most of the particles are concentrated in a dense disk, about 1000 kilometers thick, centered on the equatorial plane. However, a broader, more tenuous distribution also extends many tens of thousands of kilometers from the equatorial plane, including over the northern polar region.     

使用七参数实现WGS84经纬度坐标到西安80平面坐标的转换

简述了WGS-84坐标系、西安80坐标系以及WGS84经纬度坐标到西安80平面坐标的转换原理,并介绍了通过Erdas软件如何将栅格数据从WGS84经纬度坐标转换为西安80平面坐标.     

Chain pullout and mobility effects in friction and lubrication

The interfacial shear stress that occurs when a network of a polymer that is highly mobile at the segment level (an elastomer) is slid over a smooth surface of an immobile (glassy) polymer has been measured. The glassy material is covered by a thin layer of end-attached chains of the mobile material. The experiment was designed so that there were no free chains at the interface; the slip occurred between network chains on the one side and rigid material plus end-attached mobile chains on the other side. Two main results were obtained. (i) The interfacial shear stress is strongly affected by the segment mobility of the materials on both sides of the slip plane, and considerably lower stress is observed when the materials on both sides of the interface are highly mobile. (ii) Very thin layers of tethered chains can increase the interfacial friction. Both results are relevant to the understanding of a number of practical situations that range from the operation of thin layers of lubricants, such as those found in magnetic storage devices, to the problem of wall slip and melt fracture in polymer processing.     

13个牡丹品种花粉形态及萌发率比较

采用扫描电子显微镜,比较了13个牡丹品种的花粉形状、大小、外壁纹饰及萌发沟等。采用离体培养法,分析比较了13个品种的花粉萌发率。结果表明:13个牡丹品种的花粉有较明显的多样性,赤道面观有近球形和长球形,极面观有三裂圆形和三裂三角形。花粉均具三拟孔沟,外壁纹饰形态多样,有小穴状、穴状、网状、穴网状。‘百花娇’花粉萌发率最高(67.70%),‘洛阳红’萌发率最差(19.43%)。