Instruments measured the topography, the object position or temperature, speed, functionality and other physical quantities
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No. 2
Measuring the depth of the cabinet, the height and width
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Speculation measure
Speculation measure. Jin Yuan Hong, "Han Ji Lingdi century after the": "tert-degree bark as boundless expanse of the wave, clarification of the vague, rather than the cloud radius, the device broad and deep, too hard to measure." Former Shu Wei Zhuang, "and Zheng Supplements sense of things 100 Autumn Rhythm ":" As a country Fang Yi insurance, Tien-hsin nothing was measured. "Ye Shi Song" Ye Ling study in mind ":" The book of such broad and far-reaching immeasurable. "Liuqing" Pioneering "the first 10th four chapters: "honest and sincere old Shirley, eyes measuring the change Xia's heart."
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Instruments or measuring the temperature measurement of space, time, speed ﹑ ﹑ ﹑ functional shape of the ground level and the size of components ﹑ angle
Determination of instruments or measuring space, time, temperature, speed, function, the shape of the ground level and parts of the size, angle and so on. Clear a Summary of "Zhou politicians liberal arts": "stealing that: Yi Ling first of all small schools to Qianjin applicable arithmetic, such as prescribing, sagittal and algebra, the proportion of all patients, all general education students that create the basis for measurement. "noble" Sunny "First ○ five chapters:" base dam breath, is a very hasty, neither with instruments to measure, there is no design, is to mix the old mason hi old man pointing to where one, explains the dry up. "
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No. 5
Concept of measurement The measurement is in accordance with certain rules, use data to describe the observed phenomena, things that make quantitative description. Measurement is the process of quantifying non-quantitative food. Defined measurement 1 defined earlier: the shape and size of the earth studies to determine the coordinates of ground point discipline. 2 The current definition: study three-dimensional space shape, size, position, direction and discipline of its distribution of various objects. Content includes measuring and surveying Surveying two parts. Determination is the use of measuring instruments and tools, through measurements and calculations, get a series of measurement data, or shrink the earth's surface topography plotted topographic maps. Surveying refers to good planning and design drawings of buildings and structures on the ground out of position calibration, as the basis for the construction. 3 measurement tools Length - scale, vernier caliper Quality - Balance Time - timer, stopwatch Volume - liquid or solid irregular cascade measurements: cylinder & cup. Note that 1) read correctly scale of zero scale, the smallest scale, measuring range; (2) the scale and the scale of the object as close as possible, can not be skewed; (3) reading, sight should be perpendicular to the object and scale; (4) In addition to the above you read the smallest scale figures, it should also read the next smallest scale an estimated figures; Measurement data (5) records, including the exact value, the estimated value and the unit (unitless numerical value is meaningless). For precision measurement, pay attention (1) to consider the effects of temperature and humidity measurements on the measurement results, the measuring and the workpiece should be placed as far as possible in the same ambient temperature, 1m or less less than 1.5h, 1 ~ 3m for 3h, should pay more than 3m more than 4h. (2) To reduce the error caused by the load (3) measuring the ambient requirements: no vibration, no magnetic field is no dust, etc. Classification Measurement Composition measurement: If there are multiple measurements, although there is a certain function is measured (unknown) and some intermediate amount, but as a function of a plurality of unknown type, the amount of the intermediate is impossible to obtain a measurement is measured value. Then you can change the measurement conditions to obtain different combinations of some measurable and measured values of these combinations, solving simultaneous equations to compute the unknown is measured. Comparison of measurement: comparative law refers to the measurement device known similar measure to compare the comparator, which seek a way to be measured. This method for measurement of high accuracy. Null method: Measured with a known amount comparison that the difference between the two is zero, this method is called the zero method. Such as bridges, balance, steelyard, galvanometer Deviation hair: measured direct effect on the measurement of institutions such as the pointer deflection or displacement is measured to indicate the size. Alternative method: alternative hair is to be measured with a known amount has access to the same measuring instrument, without changing the working status of the instrument, so that the value of the two measurements show the same instrument is considered equal to a known quantity being measured. For example Cao Chong said the elephant. Units of measure Units of measure unit of measurement The standard measurement is defined as "units." The unit is a standard amount _select_ed, independently defined unit called "basic unit" (base unit); units derived from the physical relationship known as "derived units" (derived unit). International System of Units (SI) International System of Units 1980 and recommended the adoption of a consistent system of units is measured by the International Conference (CGPM). Note: SI International System of Units is the international symbol. At present, the international system of units under seven basic units: Length m M Quality kilograms (kg) Kg Time seconds S Current Ann [training] A Open thermodynamic temperature [Kelvin] K Amount of substance Mount [Seoul] Mol Luminous intensity Hom [de] cd
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Encyclopedia
Measure measurement cel heart ng Side t (~ uremeni) to determine a magnitude for the purpose of Group operations. Generally considered to be: through physical experiments, the t side is a The same amount as a reference to compare the process of cognition. Quantitative understanding And master the basic method is to count things, and can not by measuring Direct counts can be counted into things. T is the total measurement of nuclear science Heart concept and object of study, they have been defined as metrology measurements on Science. In science and technology, trade and economic and other social activities, anytime, anywhere for For all practical purposes a number of measurements. According to scientific measurements Principles and physical effects, called side volume principle, as applied to temperature measurement Thermoelectric effects. When used in the measurement, a description by category Operating sequence group called the visit a logical approach. Obtained from the measurement T is called the measured values measured full results. Associated with the measurement result, Characterized by dispersion amount parameter value side is called measurement uncertainty children. Side t test results minus the true value of the basin, known as yellow measuring error. Characterization measurements t results between the true value is the amount of lateral extent consistent qualitative concept called the visit Full accuracy. (Read Lee Ann)
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English Expression
: taking off
n.: admeasurement, gauging, measurement, process of measuring, mensuration, measure; survey; gage; determine, metering, make a survey of, take the gauge of, field book, survey, surveying, testing
v.: gauge, map or record of this, sound, remeasure, mete, measure
vt.: scale, measuring, measured
French Expression
v. mesurer, arpemter
Thesaurus
measurement, token, index survey, survey, survey register
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