摘要:
In a portable electric apparatus comprising a radio tuner, an optical disc drive, a casing, and an antenna, the apparatus further comprises a lid arranged on a top surface of the casing. The lid is openable for taking the optical disc into and out from the optical disc drive. The antenna is mounted to the lid. An earth plate electrically connected to the antenna is mounted to the lid.
摘要:
To provide an antenna apparatus having high reliability without applying a stress to a portion of a grounding spring bonded with an LNA board.An antenna unit 3 is mounted on one race of an antenna board 4 and an LNA board 1 is mounted on other face of the antenna board 4 and attached with a shield case 6 to cover the LNA board 1. The LNA board 1 is attached with a grounding spring 5 such that a front end thereof is brought into contact with an inner face of the shield case 6. The grounding spring is a grounding spring of a press spring type a base end portion which is pressed to a side of the LNA board 1 by a press force exerted to the front end. When the front end of the grounding spring 5 is brought into press contact with the inner face of the shield case 6 by an elastic force, the press force is operated to press the base end portion of the grounding spring 5 to the side of the LNA board 1.
摘要:
A method for improvement (treatment) and prevention of dry spots on the grass surface of a golf course comprising sprinkling of an acetylene alcohol derivative (s) or sprinkling of it along with a water soluble polymer water retentive agent on the grass surface. Also, a method for prevention of dry spots on the grass surface of a golf course comprising sprinkling of a water soluble polymer water retentive agent(s) on the grass surface.
摘要:
An apparatus for use in a crystal manufacturing system based on a floating zone method or Czochralski method, adapted to control a quantity relating to the diameter of a crystal rod at the crystallization boundary, and designed to reduce hunting in the control of the quantity relating to the crystal diameter so as to prevent disturbance in crystallization and reduce irregularities in the surface of the crystal rod even if there is a discrepancy between a predetermined pattern and the ideal pattern with respect to the quantity to be controlled. The apparatus has a controller provided with: a program setter (72) adapted to output a quantity based on a predetermined pattern written in the controller in response to a detected value of the quantity relating to the crystal diameter at the crystallization boundary (24) or to the length of the crystal rod (18); a first adjuster (84) for performing a PI or PID control action in response to the difference between the detected value and the desired value of the quantity relating to the crystal diameter at the crystallization boundary (24); a second adjuster (76) for performing, in response to the difference between the detected value and the desired value of the quantity relating to the crystal diameter at the crystallization boundary (24), I.sup.2 control action for additional time-integration of a value obtained by time-integration of this difference; and a superposer (78) for outputting, as an adjustment amount, a value of linear combination between the program setter (72), the first adjuster (84), and the second adjuster (76).
摘要:
The invention provides a novel method for the cis to trans isomerization of an alkenyl alcohol in a very simple process. The inventive method comprises heating the cis-isomer at a temperature of, for example, 150.degree. to 200.degree. C. in the presence of selenium metal in a powdery form with agitation.
摘要:
A rotation detecting sensor includes a magnetic element group including at least three magnetic elements each of which detects rotations of a rotary body that includes a magnetic body, output portions each for outputting a signal generated at each of the magnetic elements to an outside, and element selecting means for selecting arbitrary two magnetic elements from the magnetic element group and applying the generated signal to the two output portions.
摘要:
An angular sensor which enables to obtain an output signal proportional to a relative rotational angle with low manufacturing cost and with miniaturized size. An angular sensor which includes a first magnet and a second magnet fixed to a rotation body, magnetic flux sensing surface is fixed to the stator to be positioned in magnetic field between the first magnet and the second magnet and perpendicular to magnetic sensing direction for sensing a magnetic flux, a magneto-electric transducer element for outputting an electric signal corresponding to a magnetic sensing direction element of the magnetic density, deflection yokes. The deflection yokes are positioned facing the magnetic flux sensing surfaces. The deflection yokes are positioned within a range of three quarters of a distance between the first magnet and the second magnet in X-axis direction and one half of a distance between the first magnet and the second magnet in Y-axis direction.
摘要:
To enable to easily attach an LNA board onto an antenna board without bringing about an increase in fabrication cost or an increase in a number of steps. An antenna unit 3 is mounted on one face of an antenna board 4 and an LNA board 1 is mounted on other face of the antenna board 4. The LNA board 1 is formed with an end face through hole and is soldered to the antenna board 4 at the end face through hole. This soldering enables to attach the LNA board 1 on the antenna board 4 and to electrically connect a GND pattern 4b of the antenna board 4 and a ground pattern 1c of the LNA board 1.
摘要:
A method of preventing and treating dry spots on the grass surface of a golf course comprising the sprinkling of a mixture of a nonionic surfactant and a water soluble polymer on the grass surface. The development of dry spots on the grass surface of a golf course can be prevented and also already developed dry spots can be treated and reduced by this method.
摘要:
The invention provides a novel method for the synthetic preparation of an .omega.-haloalkyne compound of the general formula R--C.tbd.C--CH.sub.2).sub.n X, in which X is a halogen atom, R is a monovalent hydrocarbon group and n is 4, 5 or 6, by the coupling reaction of a Grignard reagent RMgX' and an .omega.-halo-1-bromoalkyne compound of the formula X--CH.sub.2).sub.n C.tbd.C-Br. The .omega.-haloalkyne compound obtained in the above can be readily converted to the corresponding alkenyl acetate of the formula R--CH.dbd.CH--CH.sub.2).sub.n OCOCH.sub.3 by first acetylating and then partially hydrogenating in the presence of a Lindlar catalyst. In particular, 7, 11-hexadecadienyl acetate, which is a sexual pheromone compound of a noxious insect, is obtained in the same route of synthesis starting with the Grignard reagent of a 1-halo-3-octene and 1, 8-dibromo-1-octyne.
摘要翻译:本发明提供了一种合成制备通式为RC 3BOND C-CH 2)n X的ω-卤代炔化合物的新方法,其中X为卤素原子,R为单价烃基,n为4,5或6 通过格利雅试剂RMgX'与式X-CH 2)nC 3 B C C Br的ω-卤代-1-溴代炔化合物的偶联反应。 上述得到的ω-卤代炔化合物可以容易地转化成式R-CH = CH-CH 2)n OCOCH 3的相应的烯基乙酸酯,首先在Lindlar催化剂的存在下进行乙酰化,然后部分氢化。 特别地,作为有害昆虫的性信息素化合物的7,11-十六碳二烯酸乙酯是从与1-卤代-3-辛烯和1,8-二溴 - 辛烯的格氏试剂开始的相同的合成路线中获得的, 1-辛炔。