过氧化氢-柠檬酸-离子交换树脂体系的可行性论证

作者基于系列文献数据和理论分析，从柠檬酸是去污剂的主要组份、过氧化氢兼具氧化剂和络合剂的功能、柠檬酸可用离子交换法再生并最终除去，论证了过氧化氢－柠檬酸－离子交换树脂将是核电站主回路在役去污有应用前景的去污剂体系。     

全碳分子C60电弧法合成工艺及其机理

对电弧法合成全碳分子Ｃ６０（简称Ｃ６０）的工艺及机理进行了研究通过实验，发现气体种类、压力等因素对Ｃ６０产率有明显影响．给出了获得高Ｃ６０产率的氢气压力区域为１０×１０４～１３×１０４Ｐａ在电弧法合成Ｃ６０的机理方面讨论了电弧中电子及气体原于在形成Ｃ６０分子过程中的作用．     

Fe-Ga合金阻尼性能影响因素

从合金成分、热处理工艺、磁化处理,及合金的微观结构等方面,较系统地研究了Fe-Ga合金阻尼性能的主要影响因素,探讨了通过不同的合金成分设计,热加工及磁化处理方法优化提高合金阻尼性能的途径.     

The self-assembly of dialdehyde-cellulose-nanofiber-based hydrogels with high compression resilience

Cellulose - Cellulose-nanofiber-based hydrogels (CNF-Gel) exhibit excellent mechanical properties and designable functions. However, it is difficult to coordinate the complex self-assembly...     

A module design of rearrangeable nonblocking double omega optical network using binary optics elements

Omega network plays an important role in all optical communication and optical interconnection networks. In this paper, a novel technology, which binary optics element (micro-blazed grating array) can realize perfect shuffle transform including inverse perfect shuffle and left perfect shuffle, is proposed. Moreover, by a cascade of inverse perfect shuffle and left perfect shuffle, a multistage rearrangeable nonblocking omega network can be constructed. Simultaneously, the bipartition graph algorithm (BGA) is adopted to ascertain the state of node switch in each node stage (straight or crossover connection). At last, a module of the rearrangeable nonblocking omega network which is integrated with polarizing beam-splitter, half-wave plate, micro-blazed grating array, is presented. It can accomplish the functions of 8-channel signal beams’ sorting and switching without routing conflict and blocking, and has advantages of being compact in structure, easy to integrate, efficient in performance etc. Finally, both the theoretical analysis and the experimental result show that this module proposed here may be helpful in free-space optical interconnection network and optical information processing.     

Beam steering and deflecting device using step-based micro-blazed grating

The rapidly evolving demands of optical communications and optical switching systems have created a new market for high capacity all-optical beam steering and deflecting techniques. One technology potentially capable of realizing such systems uses the multistep micro-blazed grating optical beam deflectors based on binary and multiple-phase modulation methods. The micro-optical element has been fabricated by introducing very large scale integration (VLSI), stepping photolithography and reactive ion etching (RIE), which can realize beam steering, deflecting, splitting, and switching in free space, and its diffraction properties are determined by the blazed-grating parameters, such as the number of steps, grating depth, grating period, as well as blazed profile. The theoretical analysis and primarily experimental result show that this phase-type element has the advantages of high diffractive efficiency, low cross talk, small feature size, and high reliability due to nonmechanical beam steering without any moving parts. Hence it is ideally suited to applications in optical communication and optical interconnection network.     

考虑砾石颗粒形状及含量影响的砂-砾石混合物离散元模拟直剪试验

砂-砾石混合物是一种典型具有复杂结构的二元混合材料,砾石的性质对混合填料的力学性能具有显著的影响。通过开展一系列砂-砾石混合物的离散元数值模拟研究,探讨了砾石颗粒形状以及砾石的含量对砂-砾石混合物宏细观力学特性的影响,以及砾石颗粒形状和砾石含量对砂-砾石混合物力学特性产生影响的微观机理。宏观模拟结果表明,砾石含量与砾石颗粒形状都对砂-砾石混合物的宏观力学性质有显著影响,具体而言当砾石含量低于40%时,砾石含量对混合材料强度影响较小,而当砾石含量大于等于40%时,混合材料强度的强度随砾石含量的增加而显著提高。同时,研究发现当砾石含量较高时,砾石颗粒长宽比对混合材料的强度影响更加显著。混合物的体变则随着砾石含量以及砾石颗粒长宽比的增加而增加。细观分析从力链结构、配位数、各向异性以及颗粒转动的角度分析了砾石颗粒形状与砾石含量的微观影响机理。研究表明,当砾石含量较低时,混合体内的力链主要以砂颗粒组成,而当砾石含量超过40%以后,剪切过程中力主要在砾石颗粒之间传递,并且高砾石含量试样中砾石颗粒长宽比较大时,砾石颗粒间的咬合力更大,使得颗粒的错动、翻转更加困难,从而使得混合物试样强度和体应变显著提...     

A Method for Obtaining Three-dimensional Images with Visual Reality of Real Objects

1IntroduCtionThree-dimenShaalsensingis0fgreatimportanceinr0boicvision,aut0maticprocessing,b~dicineandcomPuter'animatdri-OPticalthree-dimensionalsenSngaregettingmoeandmoeimportantbecauseofitsadvantagesofnon-contact,highprecisionandaut0maticcontr0.TheoPticalthree-dimenAnalsensingmethodincludelasertriangulati0n['-'],Moreprofiboetry['1,FourierTransf0rmProfiIomtry(m)['J,andPhaseMeasurementProfilometry(PMP)[6].Exceptlasertriangulatdri,theabovemethOdsarefitforthree-dimensi0nalsensing0nlyfrOI…     

三株弧菌热休克蛋白70基因的克隆和序列分析

 根据GenBank中同类蛋白序列设计特异PCR引物,从2株创伤弧菌Vibrio vulnificus和1株河弧菌Vibrio fluvialis中扩增出热休克蛋 白70（heat shock protein, hsp70）基因片段。对这3个片段进行克隆、测序和分析的结果表明,3个片段长均为1 911 bp,包含完整的 hsp70 ORF,编码636个氨基酸。它们的氨基酸序列与GenBank中其它物种hsp70的氨基酸序列比较发现,2株创伤弧菌hsp70基因序列 和同种其它菌株的同源性高,达98%以上;而河弧菌的hsp70序列属首次克隆;与多种原核和真核生物的hsp70氨基酸序列一起构建 了系统进化树,结果支持传统的分类结果。     

采用多投影器的反向条纹投影技术

提出运用多投影器同时投影的反向条纹投影技术。通过测量标准样品的绝对相位,为不同角度放置的投影器产生不同的反向条纹。检测时,投影器同时投影各自的反向条纹,若物体和样品一致,在摄像机上就得到一幅消除了阴影和截断的标准正弦条纹图,若物体有变形,仅用裸眼就能判断,用简单的傅里叶变换和相位展开就能定量地描述变形。对于复杂的不连续物体也只需获取一幅条纹图就能完成检测,在很大程度上解决了阴影及相位展开的问题,实现了该类物体的在线快速检测。阐述了该技术的原理,以双投影器的反向条纹投影为例,实验验证了提出方法的有效性,并进行了相应的误差分析和应用条件讨论。