http://hdl.handle.net/11133/29 1965-10 Fri, 17 Apr 2026 14:41:50 GMT 2026-04-17T14:41:50Z http://hdl.handle.net/11133/138 タイトル: 低温切削における超硬工具の損傷 著者: 藤井, 義信 抄録: 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. Sat, 09 Oct 1965 15:00:00 GMT http://hdl.handle.net/11133/138 1965-10-09T15:00:00Z http://hdl.handle.net/11133/139 タイトル: 発振器の相互結合現象について : 脳と神経の電気回路的, 数学的モデルについて 著者: 新美, 吉彦 抄録: 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. Sat, 09 Oct 1965 15:00:00 GMT http://hdl.handle.net/11133/139 1965-10-09T15:00:00Z http://hdl.handle.net/11133/135 タイトル: 最小時間制御における最適量子化制御信号について 著者: 小林, 英夫 抄録: This paper is concerned with the problem of the optimum quantization of control signals in the minimum-time control of the multistage deterministic and discrete processes. For the purpose of minimizing the controlling time needful to bring the values of the state variables of the plant to within the allowable error of the given reference value, being given that the initial state variables of the plant are distributed with the gaussian probability density founction and the reference value of the system takes different values, we obtained the results of computation using the method of dynamic programming from the foundation of the definition of optimum quantization. Some figures are presented which compare the curves of the minimum-time and the timeresponse in case of using the optimum quantized signal with those of the other case and visualize the effect of the optimum quantization for minimizing the expected value of the controlling time. Sat, 09 Oct 1965 15:00:00 GMT http://hdl.handle.net/11133/135 1965-10-09T15:00:00Z http://hdl.handle.net/11133/136 タイトル: ニトリルゴムの圧縮歪(第1報) 著者: 浅田, 幸作; 稲垣, 慎二; 中神, 建一; 渋谷, 勝治; 水野, 謙治; 竹内, 篤郎 抄録: When 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. Sat, 09 Oct 1965 15:00:00 GMT http://hdl.handle.net/11133/136 1965-10-09T15:00:00Z