THE EFFECT OF THE CBN WHEEL DRESSING AND THE GRAIN HEIGHT PROTRUDING FROM THE BOND ON THE GRINDING PERFORMANCE

CBN (Cubic Boron Nitride) is a highly efficient abrasive and has unique properties (highhardness, high thermal stability and high chemical inertia). As early as 1969 CBN Wheels had al-ready been made and showed excellent performance for grainding high speed steels and othermaterials hard to be ground. So far, however, CBN Wheels are still not popularly utilized in theindustry, the writer considers the main reason being the inadequate study for practical applica-tions and especially the suitable dressing technique. The dressing of resinoid CBN Wheels discussed in the paper, is different from that ofconventional ones. It has to be divided into two operations, truing and sharpening, each of whichhas its specific and independent functions. A simple dressing method with a lot of informationsuitable for production is studied; finally, the grain height protruding from the bond is taken asan index for evaluating the dressing results, and the effect of grain height on the grinding per-formance is discussed. By selecting proper conditions according to the workpiece requirements, abetter technical and economical benifit can be obtained.     

THE CAM DESIGN CONSIDERING THE RUNNING SPEED FLUCTUATION OF THE CAM SHAFT

In order to get the motion of a cam follower to meet its ideal requirements, we have to design the cam profile by considering its running speed fluctuation. In this paper, taking the beat up motion mechanism of a projectile loom as an example, a cam design method is illustrated with its spced fluctuation being considered.     

THE COMEDY

A Critieism of the "Divine Comedy" of Dame Alighieri Translated from theItalian of Francesco di SanetisAny one who has followed me will have seen that the Divine Comedywas not a new, original. or extraordinary idea sprung from the mind of Dameand thrown into the midst of a marvelling world. Rather its importance lay inthat it was everybody's idea, the thought that was lying at the bottom of all theliterary forms: legends, visions, treatise. treasures, gardens, sonnets and canzoni.The Alle…     

THE OXYGEN-ALKALI BLEACHING OF THE STRAW PULP

1INTRODUCTIONAt present, the pulp industry is facing to the large stress against using bleaching agents which contain the chlorine. And the paper making industry has fixed the attention to lighten the environment pollution. To reduce the pollution, many countries have carry through the TCF (total chlorine free bleaching), and that the oxygen-alkali bleaching is one of the maturate technology of TCF by now. To obtain clean produce the oxygen-alkali bleaching of NaOH-AQ straw pulp has b…     

THE ORBITAL EVOLUTION OF THE NEAR-EARTH ASTEROIDS

ＴＨＥＯＲＢＩＴＡＬＥＶＯＬＵＴＩＯＮＯＦＴＨＥＮＥＡＲ┐ＥＡＲＴＨＡＳＴＥＲＯＩＤＳＬｉｕＬｉｎＪｉＪｉａｎｇｈｕｉ（ＤｅｐａｒｔｍｅｎｔｏｆＡｓｔｒｏｎｏｍｙ，ＮａｎｊｉｎｇＵｎｉｖｅｒｓｉｔｙ，２１００９３，Ｎａｎｊｉｎｇ，ＰＲＣ；）Ｋｅｙｗ...     

THE EFFECT OF ANION ON THE MORPHOLOGY OF ELECTRODE, THE ADSORPTION OF QUINOLINE AND THE SER SPECTRA

The effect of different anion on the morphology of electrode, the adsorption of quinoline and the SER spectra are investigeted. The adsorption peak of quinoline appears in cyclic voltammogram in Cl~- (or Br~-) -containing electrolyte, but not in NV_3~- solution. We also find that the adsorption of quinoline is correlated with Cl~- concentration. This indicates some complex consist of Cl~- and quinolne are produced on Ag surface, Scanning electron microscopy is used to evaluate differences in surface morphology subjected to ORC treatment in different anion solution.The surface morphology of Aq electrode roughened in NO_3~- solution on which no SER signal can be observed differs greatly from that of Ag electrode which roughened in Cl~-(or Br~-)-containing electrolyte.     

CHOICE OF THE GAUGE FOR THE FIRST POST-NEWTONIAN GRAVITATIONAL POTENTIAL OF THE EARTH

ＴｈｅＥａｒｔｈｓｇｒａｖｉｔａｔｉｏｎａｌｐｏｔｅｎｔｉａｌ（ＧＰ）ｃａｎｂｅｅｘｐａｎｄｅｄｉｎｔｗｏｆｏｒｍｓ：（ｌ）ｓｐｈｅｒｉｃａｌｈａｒ－ｍｏｎｉｃｓｅｘｐａｎｓｉｏｎ；（２）ｅｘｐａｎｓｉｏｎｉｎｔｅｒｍｓｏｆｍｕｌｔｉｐｏｌｅｍｏｍ...     

THE STUDY OF THE“TASTE ORGANS”OF THE TAILLESS AMPHIBIAN TADPOLES

This paper deals with the study of the so-called "taste organs" of 35 spe ies of tadpoles of different kinds of frogs and toads. They represent 7 families and 13 go.ieva and are mostly from West China. Kaloula borealis is utilized for more detailed study as it is a common species of Peking and its environs, consequently we are in possession of sufficient material both for the study of the morphology and the development of these organs.     

ON THE STANDARDIZATION OF THE KEYBOARD MANAGEMENT MODULE

Both the variety of Chinese Information input techniques and the complexity of the users‘ demands require that the keyboard management module with the ability to input Chinese Information could be modified and expanded conveniently.This paper presents a standard structure of this keyboard management module which will meet the needs of developing Chinese Information input techniques.     

THE WELL─POSEDNESS OF THE POIN CAREBOUNDARYVALUEPROBLEMFORHARMONICFUNCTIONS

本文给出多连通区域上调和函数Ｐｏｉｎｃａｒé边值问题的适定提法，并且在解析函数已有结果的基础上证明了变态Ｐｏｉｎｃａｒé问题的可解性     

THE COMPOUND BOUNDARY VALUE PROBLEMS WITH THE MIXED BOUNDARY CONDITIONS IN THE UPPER HALF-PLANE

In this paper, we consider two problems (MR) and (MH).Let L_(1j)(j=1, …, m) be a mutually exclusive closed Lyapunov curve system in the upper half-planeZ~+ and each curve L_(1j) take the clockwise direction as its positive direction, D_(1j)~- be the inner region boundedby L_(2j)(j=1,…,m) and L_1= L_(1j), D_1~+=Z~+\(D_1~- U L_1), X be the real axis, {a_1,b_1…,a_n,b_n} be a set of points on X and -∞相似文献   

THE CONSTRUCTION OF THE INTERFERENCE PLANE GRADIENTS IN LDA FOR INVESTIGATING THE CONDITIONAL HETERODYNE

An experimental set-up of LDA with interference plane gradients is constructed to show the conditional heterodyne contribution. The separation factor (S_f) of two Doppler spectrum is calculated in the disc experiment We find that S_f has no maximum value, as one could be tempted to expect for the case Z_v=Z_(min). In a single lens set-up it is difficult to suppress the conditional heterodyne contribution Telescope-lens system can be used to obtain both the noncoherent detection for the conditional heterodyne and the larger separation factor S_f.     

THE CALCULATING EQUATIONS OF THE THERMOPHYSICAL PARAMETERS OF THE MOIST AIR AT HIGH TEMPERATURE

By using compression factors of real gas and the Vilia equations and considering the variation of the thermophysical parameters of the mois air with its temperature, this paper develops the calculating equations of the thermophysical para leters of the moist air at high temperature ranging from 100℃- 200℃. It is convenient to calculate the thermophysical parameters and the thermophysical processes of the moist air at high temperature.     

STUDIES OF THE DEVELOPMENT OF KALOULA BOREALIS HARBOUR Ⅱ. THE EFFECT OF FOOD ON THE DEVELOPMENT OF THE DIGESTIVE SYSTEM

Tadpoles of Kaloula borealis Barbour were used for feeding experiments. They were fed separately on four different kinds of food viz, 1) yolk of hardboiled egg,2) algae collected from ponds 3) yolk and algae together and 4) yolk,lgae plus thyroxin. The control specimens consisted of tadpoles richly collected from time to time from outdoor ditches.     

RESEARCH ON THE STRUCTURE AND THE PROPERTY OF THE HYGROSCOPIC AND PERMEABLE FABRIC FOR SPORTSWEAR

Two structure models for knitting fabric are set up according to the wet-heat transmission principle of the fabric. Four kinds of knitted fabrics for sportswear are designed and produced. The wet-heat property of these fabrics is researched.     

THE SYMBOLS OF YI KING,OR THE SYMBOLS OF THE CHINESE LOGIC OFCHANGES.

周易为古籍中难解之书,故亦为多解之书。经师家主一说,固无论矣。而自汉以後学者以异学牵合经义者代有其人,如汉儒之傅会图议,魏晋人之援引老庄,宋儒之推衍象数,皆其中之最著者。邵雍传陈传之学,演易卦为皇极经世,司马光提扬雄太玄而作洗虚,推衍象数,系统尤密,各自以为发宇宙之玄理,然以後人观之,皆不免有“空中楼阁”之感(程颐论邵雍语)。沈仲涛君;以多年学易之所得,著为易卦与科学一书,大旨在阐明吾国五千余年前先哲之玄学(沈君以八卦为西磨纪元前3322年伏义所书)实与二十世纪之科学相吻合。沈君八卦爻与几何,代数,算术,物理,天文,化学,逻…