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Tang Dingyuan
Tang Dingyuan (; 12 May 1920 – 3 June 2019), also known as Ting-Yuan Tang, was a Chinese physicist and writer. He was considered a founder of semiconductor and infrared research in China. He served as Director of the Shanghai Institute of Technical Physics and was elected an academician of the Chinese Academy of Sciences in 1991. Early life Tang was born on 12 May 1920 in Jintan, Jiangsu, Republic of China. After finishing middle school in Jintan, he entered Wuxi Normal College in 1935. Two years later, however, the Second Sino-Japanese War broke out and the Japanese army occupied Jiangsu. Tang and his classmates fled Wuxi and begged their way to Wuhan in central China, where they lived in a refugee camp. In 1938, the Kuomintang government arranged for the student refugees to enroll at National Sichuan High School in Chongqing, China's wartime capital. He subsequently entered National Central University, then also exiled in Chongqing, and graduated from the Department of Phys ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tāng (surname)
Tāng (; ) is a Chinese surname. It is 72nd surname in the ''Hundred Family Surnames'' or ''Baijiaxing'' of the Song dynasty and 101st in modern popularity. The Tang (湯) family name comes from Tang of Shang, the first ruler of the Shang dynasty. Ancestry.ca In modern times the character can also mean "" or "". Notable people * (; 1550–1616), Chinese playwright * |
Cerium
Cerium is a chemical element with the symbol Ce and atomic number 58. Cerium is a soft, ductile, and silvery-white metal that tarnishes when exposed to air. Cerium is the second element in the lanthanide series, and while it often shows the +3 oxidation state characteristic of the series, it also has a stable +4 state that does not oxidize water. It is also considered one of the rare-earth elements. Cerium has no known biological role in humans but is not particularly toxic, except with intense or continued exposure. Despite always occurring in combination with the other rare-earth elements in minerals such as those of the monazite and bastnäsite groups, cerium is easy to extract from its ores, as it can be distinguished among the lanthanides by its unique ability to be oxidized to the +4 state in aqueous solution. It is the most common of the lanthanides, followed by neodymium, lanthanum, and praseodymium. It is the 25th-most abundant element, making up 66 ppm of the Ear ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ivan Bardin
Ivan Pavlovich Bardin (Russian: Иван Павлович Бардин) (1883–1960) was a Soviet metallurgist and active participant in solving the main engineering issues of the domestic ferrous metallurgical industry. He was also an Academician of USSR AS (1932), vice-president of USSR AS (from 1942), Hero of Socialist Labor (1945), and winner of the Lenin (1958) and State prizes (1942, 1949). His scientific interests were designing new powerful completely mechanized steel works; creating advanced typical metallurgical aggregates; intensifying metallurgical processes, especially by means of oxygen; elaborating and introducing the basic oxygen process; and assimilation and multi-purpose utilization of new kinds of metallurgical raw materials. Career He was chair of economics and management (1943–1959) of the Moscow Institute of Steel and Alloys (Moscow, Russia)(MISIS). Since 1910 after graduation from the Kiev Polytechnic Institute [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Infrared Detector
An infrared detector is a detector that reacts to infrared (IR) radiation. The two main types of detectors are thermal and photonic (photodetectors). The thermal effects of the incident IR radiation can be followed through many temperature dependent phenomena. Bolometers and microbolometers are based on changes in resistance. Thermocouples and thermopiles use the thermoelectric effect. Golay cells follow thermal expansion. In IR spectrometers the pyroelectric detectors are the most widespread. The response time and sensitivity of photonic detectors can be much higher, but usually these have to be cooled to cut thermal noise. The materials in these are semiconductors with narrow band gaps. Incident IR photons can cause electronic excitations. In photoconductive detectors, the resistivity of the detector element is monitored. Photovoltaic detectors contain a p-n junction on which photoelectric current appears upon illumination. An infrared detector is hybridized by connecting ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Copper(I) Oxide
Copper(I) oxide or cuprous oxide is the inorganic compound with the formula Cu2O. It is one of the principal oxides of copper, the other being or copper(II) oxide or cupric oxide (CuO). This red-coloured solid is a component of some antifouling paints. The compound can appear either yellow or red, depending on the size of the particles. Copper(I) oxide is found as the reddish mineral cuprite. Preparation Copper(I) oxide may be produced by several methods. Most straightforwardly, it arises via the oxidation of copper metal: : 4 Cu + O2 → 2 Cu2O Additives such as water and acids affect the rate of this process as well as the further oxidation to copper(II) oxides. It is also produced commercially by reduction of copper(II) solutions with sulfur dioxide. Reactions Aqueous cuprous chloride solutions react with base to give the same material. In all cases, the color is highly sensitive to the procedural details. Formation of copper(I) oxide is the basis of the F ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lead(II) Sulfide
Lead is a chemical element with the symbol Pb (from the Latin ) and atomic number 82. It is a heavy metal that is denser than most common materials. Lead is soft and malleable, and also has a relatively low melting point. When freshly cut, lead is a shiny gray with a hint of blue. It tarnishes to a dull gray color when exposed to air. Lead has the highest atomic number of any stable element and three of its isotopes are endpoints of major nuclear decay chains of heavier elements. Lead is toxic, even in small amounts, especially to children. Lead is a relatively unreactive post-transition metal. Its weak metallic character is illustrated by its amphoteric nature; lead and lead oxides react with acids and bases, and it tends to form covalent bonds. Compounds of lead are usually found in the +2 oxidation state rather than the +4 state common with lighter members of the carbon group. Exceptions are mostly limited to organolead compounds. Like the lighter members of the group, le ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Galena
Galena, also called lead glance, is the natural mineral form of lead(II) sulfide (PbS). It is the most important ore of lead and an important source of silver. Galena is one of the most abundant and widely distributed sulfide minerals. It crystallizes in the cubic crystal system often showing octahedral forms. It is often associated with the minerals sphalerite, calcite and fluorite. Occurrence Galena is the main ore of lead, used since ancient times, since lead can be smelted from galena in an ordinary wood fire. Galena typically is found in hydrothermal veins in association with sphalerite, marcasite, chalcopyrite, cerussite, anglesite, dolomite, calcite, quartz, barite, and fluorite. It is also found in association with sphalerite in low-temperature lead-zinc deposits within limestone beds. Minor amounts are found in contact metamorphic zones, in pegmatites, and disseminated in sedimentary rock. In some deposits the galena contains up to 0.5% silver, a byproduct that ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silicon
Silicon is a chemical element with the symbol Si and atomic number 14. It is a hard, brittle crystalline solid with a blue-grey metallic luster, and is a tetravalent metalloid and semiconductor. It is a member of group 14 in the periodic table: carbon is above it; and germanium, tin, lead, and flerovium are below it. It is relatively unreactive. Because of its high chemical affinity for oxygen, it was not until 1823 that Jöns Jakob Berzelius was first able to prepare it and characterize it in pure form. Its oxides form a family of anions known as silicates. Its melting and boiling points of 1414 °C and 3265 °C, respectively, are the second highest among all the metalloids and nonmetals, being surpassed only by boron. Silicon is the eighth most common element in the universe by mass, but very rarely occurs as the pure element in the Earth's crust. It is widely distributed in space in cosmic dusts, planetoids, and planets as various forms of silicon dioxide ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Germanium
Germanium is a chemical element with the symbol Ge and atomic number 32. It is lustrous, hard-brittle, grayish-white and similar in appearance to silicon. It is a metalloid in the carbon group that is chemically similar to its group neighbors silicon and tin. Like silicon, germanium naturally reacts and forms complexes with oxygen in nature. Because it seldom appears in high concentration, germanium was discovered comparatively late in the discovery of the elements. Germanium ranks near fiftieth in relative abundance of the elements in the Earth's crust. In 1869, Dmitri Mendeleev predicted its existence and some of its properties from its position on his periodic table, and called the element ekasilicon. In 1886, Clemens Winkler at Freiberg University found the new element, along with silver and sulfur, in the mineral argyrodite. Winkler named the element after his country, Germany. Germanium is mined primarily from sphalerite (the primary ore of zinc), though germanium is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Three-anti And Five-anti Campaigns
The Three-anti Campaign (1951) and Five-anti Campaign (1952) () were reform movements originally issued by Mao Zedong a few years after the founding of the People's Republic of China in an effort to rid Chinese cities of corruption and enemies of the state. The result turned into a series of campaigns that consolidated Mao's power base by targeting political opponents and capitalists, especially wealthy capitalists.Dillon, Michael. 998(1998). China: A Historical and Cultural Dictionary. Routledge publishing. The campaigns negatively impacted the economy of big cities such as Shanghai, Tianjin and Chongqing, forcing many businessmen to commit suicide. In Shanghai alone, from January 25 to April 1, 1952, at least 876 people committed suicide. The Three-anti campaign The Three-anti Campaign was launched in Manchuria at the end of 1951. It was aimed at members within the Chinese Communist Party, former Kuomintang members and bureaucratic officials who were not party members. Spence ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wang Shouwu
Wang may refer to: Names * Wang (surname) (王), a common Chinese surname * Wāng (汪), a less common Chinese surname * Titles in Chinese nobility * A title in Korean nobility * A title in Mongolian nobility Places * Wang River in Thailand * Wang Township, Minnesota, a township in the United States * Wang, Bavaria, a town in the district of Freising, Bavaria, Germany * Wang, Austria, a town in the district of Scheibbs in Lower Austria * An abbreviation for the town of Wangaratta, Australia * Wang Theatre, in Boston, Massacheussetts * Charles B. Wang Center, an Asian American center at Stony Brook University Other * Wang (Tibetan Buddhism), a form of empowerment or initiation * Wang tile, in mathematics, are a class of formal systems * ''Wang'' (musical), an 1891 New York musical * Wang Film Productions, Taiwanese-American animation studios * Wang Laboratories, an American computer company founded by Dr. An Wang * WWNG, a radio station (1330 AM) licensed to serve Havelock ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Korean War
, date = {{Ubl, 25 June 1950 – 27 July 1953 (''de facto'')({{Age in years, months, weeks and days, month1=6, day1=25, year1=1950, month2=7, day2=27, year2=1953), 25 June 1950 – present (''de jure'')({{Age in years, months, weeks and days, month1=6, day1=25, year1=1950) , place = Korean Peninsula, Yellow Sea, Sea of Japan, Korea Strait, China–North Korea border , territory = Korean Demilitarized Zone established * North Korea gains the city of Kaesong, but loses a net total of {{Convert, 1506, sqmi, km2, abbr=on, order=flip, including the city of Sokcho, to South Korea. , result = Inconclusive , combatant1 = {{Flag, First Republic of Korea, name=South Korea, 1949, size=23px , combatant1a = {{Plainlist , * {{Flagicon, United Nations, size=23px United Nations Command, United Nations{{Refn , name = nbUNforces , group = lower-alpha , On 9 July 1951 troop constituents were: US: 70.4%, ROK: 23.3% other UNC: 6.3%{{Cite ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
