defects, this refers to the lack of or incomplete coverage. Crystallography of Quality Supervision, Inspection and different areas have different meanings.
[phonetic] quē xiàn
[Interpretation] defect [Defect; the Draw back; this kind of flaw; Shortcoming flaws; shortcomings; lacking; the imperfect
[sentences] the biggest flaw in his plan did not predict the cost of the lack of ; missing; imperfect. "Song Li Hang biography:" body food and generous, when cross gift meter capsule can cure first installed but the concept within the Code in this world as a defect, Ann De'an full smug, self-seeking, said foot? " Qing Li Yu Xian Qing Ou Ji sound tolerance · Select posture: "often hear about enunciation like like picturesque defects alone in the skin by the Qing Yun Jing" his late wife, Chen Ru human rights Chu Kang Chi ":" Day on behalf of those seeking King official defects, want to squeeze them with fast Dali. "Sons and Daughters" Heroes "back: 19" This brother Lun, one of life non-defective. "Mao Zedong" about the correct handling of contradictions among the people ":" But existence of bourgeois ideology, the presence of some of the bureaucratic style of work in the national institutions, the presence of some areas in the state system defects, and and the economic foundation of socialism contradictory
extended reading: 1 Han Dian
3 defective auto product recall management the provisions
4 children's toys recall regulations
to Open Category: the word science Mathematics, Physics and Chemistry crystallography architectural terminology
2. crystallography nouns edit original meaning of
defects during crystal growth, because the original purity, each group distribution ratio, the sintering method, the powder of particle size are not perfect, the crystal growth process, the growth furnace temperature distribution, concentration distribution of the respective composition components, the manner of flow of the melt/solution, the growing atmosphere, pulling speed and casting speed are impossible to achieve perfect of crystal growth is likely to be in the local periodicity and symmetry of the destruction, that is to say, this or that defects. Generation of defects are difficult to avoid, sometimes, some defects can not be avoided by the nature of the crystal itself or growth method. There are many, according to the theory of crystal growth, in certain growth method, sometimes the presence of a defect is a specific crystal growth mode inherent growth driving force due to the crystal growth method. If the space lattice structure theory consider the crystal particle in the three-dimensional space orderly infinitely periodically arranged, then, the crystal defects, is refers to a variety Ordering the phenomenon of deviation from the crystal structure of the cycle is repeated, and to cause such periodic the deviation factor of the reason is that a defect is generated. From the angle of view of solid state physics, the causes of defects, and also lies in a variety capable of causing the cycle of the crystal lattice structure of the potential field distortion factors.
crystal defects are usually divided into point defects, line defects, surface defects and deficiencies. Investigation on the mechanical properties of materials, line defects, planar defects and crystal defects is very important. Point defects have a critical impact on the functional properties of the material, which is a solid-state chemistry and physics are most concerned about the defects.
point defects in the crystal are mainly: of vacancy defects gap defects, impurities, defects, etc.. The on M Sites of vacancy defects commonly VM, wherein V represents a vacancy, the abbreviation of the English vacancy; gap defect in the M atom is formed in the gap location on said common Mi, where M is the element symbols, i represents the atom is in the gap, Sites of English interstitial short; impurity defects in the formation of M Sites of substituents on the atom R MR said. Often with a charge of the point defects in the crystal, and the effective charge of the point defects is equal to the actual charge of the defect position minus the charge on the corresponding to the ideal crystal Sites of · in the upper-right corner of the effective charge defects symbol, 'and × respectively with positive , a negative charge and without effective charge. For example, a gap in the silver chloride crystal ion with a positive charge, in the the perfect crystals gap Sites of charge is zero, the effective charge of the silver ions gap defects is +1, represented by the top right corner of a ·, this defect is expressed as Agi ·. Another example is sodium chloride, the chloride ion vacancies on zero charge, while the charge of a chlorine ion in normal Sites of -1, and thus the effective charge of the chloride ion vacancy defects is +1, expressed as of VCl ·. No rules defect
the 3 edit the original meaning of product quality terminology
product quality AQSIQ defective product management center
edit the product quality defects products can not provide people security, or the right to expect unreasonable risk exists. Including design defects, manufacturing defects and instructions defects.
edit this paragraph AQSIQ defective product management center in September 2004, the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China approved the establishment of the AQSIQ defective product management center, accept guidance and delegate of the General Administration of the business, responsible for Defective Product Recall the day-to-day management of the work.
Management Center under the Car Recall Management Division, general product recall management, information management, research, and comprehensive management department. main functions and scope of work of
management center accepts consumer complaints about product quality, product defects, product injuries, defective product recalls and consumer education consulting; collect, collate product defect information, the establishment of an early warning report system; establishment of technical experts and product testing agency database, supervise, manage product testing and experimental institutions; organization of technical experts or the formation of the Committee of Experts defect investigation and identified; carry out the recall impact assessment; advocacy and training on product safety regulations; strengthen Defective Product Recall the coordination and communication of the parties; carry out scientific research on product safety policies, regulations, standards, and technology.
4. the building construction term edit original meaning
serious flaws serious defect
the general defects common defect
building construction quality does not meet the requirements of the test item or test point, can be divided according to their degree of serious defects and General defects.
serious defect serious defects have a decisive impact on the mechanical properties of structural members or install use performance defects.
general defect common defect mechanical properties of structural members or installation performance defects decisive influence