齐九字刀币臆造品再议

春秋战国时期,齐国铸行刀币。存世的齐刀币有"即墨之法化"(图1)、"即墨法化"(图2)、"安阳之法化"(图3)、"齐之法化"(图4)、"齐法化"(图5)、"齐返帮长法化"(图6),还有"莒邦法化"(图7)等几种版式。其面文少者三字,多者六字。齐刀币以铜质精良,制作厚大精整,端庄、秀丽、华美著称。     

浅谈手工编程的进退刀方式

文章介绍了各种进退刀方式,该方式结合了传统金属切削工艺及先进的数字化信息控制加工的优点,主要是针对外形轮廓及型腔铣的进退刀加工手段.     

秘传游身八卦滚手转刀（下）

（接上期） 第十九式：转腰滚手 接上式,摆左足成交叉步;同时,以腰胯（丹田）为中心,双手持刀由左向后向右向前片旋（名曰旋腕滚手式）目视前方。（图38）     

残月刀

雨下得好大。包裹的蓝布已经很旧了,被漂洗得露出了棉布原本的颜色,但还是十分干净。两只手慢慢将包袱打开,抽出里面的刀。     

落樱缤纷 刀光剑影

抽出一个秋日的午后,读完了美国人类学家鲁思．本尼迪克特女士的《菊与刀》,掩卷之际,书中淡淡的墨香又勾起人无限的遐想和反思……     

四川及其邻近地区一些植物的细胞学研究(一)

From standpoint of floristic division,  Sichuan is located in the middle part of Eastern Asiatic Region (Takhtajan 1978) or is the area where Sino-Himalayan Forest Subkingdom and Sino-Japan Forest Subkingdom meet (wu 1979).  Here exist many so- called Arcto-Tertiary elements and newly originated species or races.  In order to bring the light the origin and differentiation of Eastern Asiatic elements,  cytological investi- gation on plants of this region are very significant.  The materials of the following 5 species were collected on Mt.  Emei in Sichuan Province.  Voucher specimens are kept in CDBI.       1.  Toricellia angulata  Oliver var. intermedia (Harms) Hu       PMC meiotic examination revealed n = 12 at diakinesis (Pl. I fig. 9)       Toricellia,  consisting of 2 spp.,  is endemic to Eastern Asiatic Region.  Based on our result along with the report of Toricellia tiliifolia (Wall.) DC. (2n=24) by Kuro- sawa (1977),  we argue that the basic chromosome number of Toricellia is 12.  Many authors,  such as Airy-Shaw (1973),  Dahlgren (1975,  1977),  Takhtajan (1969,  1980), Thorne (1983),  have adopted Hu’s (1934) treatment erecting it as a monotypic family Toricelliaceae.  Its systematic position,  whether closer to Cornaceae than to Araliaceae or vice versa,  has been in dispute.  Cytologically it seems closer to Araliaceae,  as shown anatomically (Lodriguez 1971),  because the basic chromosome number of Cornaceae s. 1. is x=11,  9,  8 (Kurosawa 1977),  whereas that of Araliaceae is 12 (Raven 1975).       2.  Cardiocrinum giganteum  (Wall.) Makino       Somatic chromosome number,  2n=24 was determined from root-tip cells (Ph. I. fig. 8).       Cardiocrinum (Endl.) Lindl.,  consisting of 3 spp.,  is endemic to Eastern Asiatic Region.  C. giganteum (Wall.) Makino is distributed from Himalayan region to S. W. China.  The present report is in accord with the number reported by Kurosawa (1966) who got the material from Darjeeling of India.  However the karyotype of the present plant is slightly different from that given by Kurosawa.  In the present material,  the satellites of the 1st. pair of chromosomes and the short arms of llst.  pair of chromoso- mes are visibly longer than those of Kurosawa’s drawing (fig. 1,  2) The plants from Yunnan,  Sichuan and Hubei Provinces,  named as C. giganteum var. yunnanense (Leit- chtlin ex Elwes) Stearn,  differ slightly from those of Himalayan region also in outer morphological characters.  The taxon needs both cytological and taxonomical further studies.       3.  Disporum cantoniense  (Lour.) Merr.       PMC meiotic examination revealed n=8 at diakinesis (Pl. I. fig. 6)       This species is widely distributed from Himalayan region through Indo-China to our Taiwan Province and Indonesia. Three cytotypes (2n=14,  16,  30) were reported for the taxon including its variety,  var. parviflorum (Wall) Hara,  by various authors (Ha- segawa 1932,  Mehra and Pathamia 1960,  Kurosawa 1966,  1971 Mehra and Sachdeva 1976a).  Some authors consider D. pullum Salisb. and D. calcaratum D. Don as synonyms of D. cantoniense. So D. cantoniense may be a species aggregate with different extreme races.  Sen (1973a,  b.) reports that the somatic chromosome numbers of D. pullum and D. calcaratum from Eastern Himalayan region are 14,  16,  28,  30,  32.  He also discovered that chromosome alterations in species of Disporum involve not only the num- ber but the structure as well.  He found that in species of Liliaceae where the reproduc- tion is mainly vegetative,  polysomaty often occurs.  In China we have not only D. can- toniense and D. calcaratum but also D. brachystomon Wang et Tang which is similar to D. cantoniense var. parviflorum (Wall.) Hara.  These taxa need further critical studies.      4.  Paris fargesii Franch.      PMC meiotic examination revealed n=5+2B (Voucher no. 112) or n=5 (Voucher no. 62) at MI and AI (Pl. I. fig. 1. 4. 5.).  This is the first report for the species.  A bridge and a fragment were also observed at AI.      Paris polyphylla Smith is extraordinarily polymorphic species.  Hara (1969) re- gards all chinese extreme forms,  such as P. fargesii Franch.,  P. violacea Lévl.,  P. pube- scens (Hand. -Mzt.) Wang et Tang,  etc. as infraspecific taxa of P. polyphylla.  Need- less to say,  the various races of P. polyphylla Smith in China need further critical stu- dies and are good material for further study to understand the speciation.      5.  Reineckia carnea(Andr.) Kunth       Reineckia is a monotypic genus endemic to Eastern Asiatic Region.  In the present material somatic chromosome number in root-tip cells is determined as 2n=38 (Pl. I. fig. 7).  According to the terminology defined by Levan et al.,  the karyotype formula is 2n=28 m+10 sm.  The length of chromosomes varies from 14.28 μ to 5.5 μ. The idiogram given here (fig. 3) is nearly the same as that presented by Hsu et Li (1984). The same number has been previously reported by several authors,  Noguchi (1936),  Satô (1942), Therman (1956).  The karyotype is relatively symmetrical (2B,  accorling to the classi-fication of stebbins 1971) in accord with the opinion of Therman (1956).     

加工中心下刀方式的参数分析

加工中心多样式的下刀方式已被众多CAM软件所运用,但各下刀方式的优选及参数的优化却不被广大数控技术人员接受,而下刀方式的优选及参数的优化对切削刀具的切削状况、使用寿命及加工工件的表面质量具有很大意义。     

数控机床加工误差分析及对策研究

本文介绍了数控机床的各种误差和对刀方法,详细分析了数控机床的对刀误差来源及相应可采取的改善措施。通过研究这些问题,对提高数控机床的加工精度提供了依据。     

浅析数控车床中自动对刀仪相关技术问题

自动对刀仪是利用数控车床外加的监控检测设备利用数控车床自身的位置测量系统来进行工作的。本文对于数控车床中自动对刀仪相关技术问题进行分析,首先,进行概念介绍与刀具位置偏差原因分析,最后,对于刀补值的确定方法进行介绍。     

滇黔刀文化现象探析

运用文献资料法等研究方法,以区域文化理论为依据,从文化人类学的视角时滇黔刀文化现象进行研究,以探索刀文化与本地域文化的内在关系,分析其形成的因素,从而总结出其文化内涵和精髓.研究发现,刀文化普遍存在于当地的诗歌传说、巫风舞影、祭礼习俗中;而刀耕火种情节、刀的本质属性、阿昌刀的物质基础、民族本性、民间信仰和地理位置的偏远性等是其形成的主要原因.