AIT Associated Repository of Academic Resources (Aichi Institute of Technology) / 愛知工業大学学術情報リポジトリ
Not a member yet
3244 research outputs found
Sort by
ハッシンキ ノ ソウゴ ケツゴウ ゲンショウ ニツイテ : ノウ ト シンケイ ノ デンキ カイロテキ スウガクテキ モデル ニツイテ
No full textここでは脳と神経の機能の電気回路的及び数学的モデルを作ることを考察した.そこで先づ脳と神経の機能についてその概略を文献(1)によって解説し,今日迄に考えられたモデルのうち,南雲氏の能動線路(ニュリスターモデル)と,W.G.ウォルター氏のマシナ・スペクラトリクスについてその特質を述べ,筆者の考えたモデルとの比較を試みた.その後,その数学的解法としてKrylov-Bogoliubov氏の漸近法と平均化法の筆者によって工夫された改良型を述べ,筆者の考えた一番簡単な場合について,その解法を試みた.This paper deals with the mathematical model and the electrical one, of man's nervous systems and brain, which will be useful for the medical electronics and a automatic control engineer, and consists of four parts. First, We are devoted to the main properties and the organisms of nervous system and brain, with which the models have to possese. Second, Nagumo's active line model, that is neuristor, and Walter's speculatrix are described. Since these models have very interesting properties, there is the description about these models and their characters in details. Third, Our proposing models are studied mathematically and signal -flow- graphically, and are compared with the above described models. Finally, Electronic circuits using tunnel diode are dealed with, which is only one example of our models, and therefore, other models having the interesting properties may be made of electronically possible
Failure Characteristics of Cemented Carbides in Low Temperatures
Full text link本研究は超硬工具を用いて,STY80鋼(タイヤ鋼)に対する低温切削をおこなった結果について報告するものである.低温をうるためにCO_2ガスを,工具を通して切刃部まで噴射し,約-50℃まで冷却した.結果として次のことが明らかとなった.(1)焼鈍材切削試験においては実験の範囲では乾式切削の場合とCO_2による冷却の場合とでは寿命に明らかな相違はみとめられない.(2)焼入材切削においてはCO_2冷却の効果があり工具寿命が改善された.(3)CO_2冷却の場合超硬工具S_2はセラミック工具がしばしばみせるような突発欠損を生じ,低温脆性を示す.This report deals in the sub-zero machining of the STY 80 steel with cemented carbide tools. In the tests CO_2 gas was applied for cooling the cutting edge and the gas was fed through the cutting tool. Then temperatures up to minus 50 deg. were obtained in this test. The results are as follows : (1) In machining the annealed steel, there has been no difference between the tool lives in dry cut and CO_2 cooling. (2) The effect of CO_2 gas cooling is displayed in the machining of the hardened steel, namely the tool life of the carbide tool was improved. (3) The cemented carbide tool might present the brittleness in low temperatures because the carbide tool broke down very frequently in the sub-zero machining
Elastic Deformation of Nitrill Gum by Compression.
Full text linkWhen the ideal elastic substances are used as orifice of liquid or gas in a closed chamber, these amounts of outflow are changed regularly according to the change of cross section of the orifice due to the compression. But when rubber (natural or synthetic) are used for it, the instant deformations due to the compression are followed the deformation by creep and the amounts of outflow changes with time. Hence the combinations of rubbers and other sub-materials must be controlled as instant deformation to be large and as creep deformation to be small. We researched about the combinations of synthetic rubber (Nitrill gum) and other sub-materials adapt to this object
Study of the Basic Measurement of the Static Electricity in Petrorium.
Full text linkoai:repository.aitech.ac.jp:11133/133Static electricity in petrorium in oil tanks brought about by the convection current through pipes are measured by using the steel sphere probe. Ions in liquid move to the probe proportionally to the potential difference between the probe and in liquid, then leak to the earth through the insulation resistance of the prove carriage. The voltage drop is observed as the probe potential. To extend the curves obtained with prove potentials and the corresponding leakage current under the various insuration resistance show the true value of the potential in liquid (neibourfood of prove) at the point of zero current. Similar curves can be obtained with the different size prove and show the same value of the potential in liquid but they have the different inclination respectively. These inclination of curves are inversely proportional to the radii of the probes. This fact shows that the movement of ions to the prove is due to the electric force. Therefore we are able to consider as follows. when the prove has the potential V' and the leakage current through it is I, the field strength of its surface is V'/r. Where r is the radius of the prove and I/4πr^2=K.(V-V') /r. where V is potential in liquid and K is conductivity of it. In this test we find the same value of K calucurated from each curves. Such characteristics is obtained not only for grounded tanks but for the insurated one from the earth. The ion density of test liquid will be estimated from the relation of K=Q.μ. where μ is the ion mobility and Q is the ion density