查询词典 a constant temperature

In this paper, through a series of experiments, two series of quaternary-ammounium Gemini surfactants were synthesized, namely the pair alkylene double quaternary ammonium salt surfactant m-s-m·2Br and the pair the alkylene double quaternary ammonium salt surfactant -s-·2Br. We has carried on the attribute with the infrared spectrum to its structure, and to affected the factor which the synthesis pair the alkylene double quaternary ammonium salt surfactant responded to carry on the discussion. We has discovered the synthesis pair the ethylene double quaternary ammonium salt surfactant m-2-m·2Br optimum condition: The bromo alkane and a tetramethyl ethylene diamine mole of ratio is 3.0: 1.0, makes the solvent by the ethyl alcohol, 80℃ under responds for 48 hours in the backflow temperature; Synthesis pair alkylene double quaternary ammonium salt surfactant 12-S-12 ·2Br optimum condition: 12 tertiary amine and 1, 3- propylene dibromide (1, 4- two bromines butane) a mole of ratio is 2.2: 1.0, makes the solvent by the ethyl alcohol, responds for 48 hours in the constant temperature 80 ℃ under backflow.

本文通过一系列的实验，合成了两个系列的Gemini型表面活性剂，即双烷撑双季铵盐表面活性剂m-s-m·2Br和双烷撑双季铵盐表面活性剂-s-·2Br，用红外光谱对其结构进行了表征，并且对影响合成双烷撑双季铵盐表面活性剂反应的因素进行了讨论，找出了合成双乙撑双季铵盐表面活性剂m-2-m·2Br的最佳条件：溴代烷与四甲基乙二胺的摩尔比为3.0：1.0，以乙醇作溶剂，在回流温度80℃下反应48小时；合成双烷撑双季铵盐表面活性剂12-s-12·2Br的最佳条件：十二叔胺与1，3-二溴丙烷(1，4-二溴丁烷)摩尔比为2.2：1.0，以乙醇作溶剂，在恒温80℃下回流反应48小时。

In addition, for temperature stabilization, the cuvette holder's base plate has internal channels that can connect to a circulating, constant-temperature water source .

另外为了达到稳定的温度，试管支架的底架有内部通道，通道与一个循环的、恒温的水源连通。

Recent experiments on the Si (111)(7×7)-(1×1) phase transition showed that when the temperature is raised above the critical temperature, a 7×7 island decays to zero at a constant area decay rate which increases with the size of the initial area.

近期Si(111)(7×7)-(1×1)相变的实验研究发现，将温度升高到相变温度以上时，7×7岛面积以恒定的衰减速率随时间减小至零，且初始面积越大的岛这个衰减速率就越大。

An organism, such as a mammal or bird, having a body temperature that is constant and largely independent of the temperature of its surroundings; an endotherm.

恒温动物一种体温恒常且不受外界温度影响的生物体，象哺乳动物或鸟；恒温动物

Has successfully developed a "mobile phone","radio""Cordless Phone" test high-performance shielded boxes, shielded room;"keyboard""Mouse" life testing machine, such as: Mouse trackball MTBF room temperature experiments; mouse button life testing machine; 3D roller test machine; keyboard key life testing machine; keycap friction test machine; wire swing test machine; a variety of electronic products a large constant temperature and humidity aging room; components Clubfoot forming machine; automated complete control system; Electrical products matching; pneumatic, electric Centralized control unit software 30 kinds of testing laboratories, machines and industrial control test software.

目前已成功开发出"手机""对讲机""无绳电话"测试用高性能的屏蔽箱、屏蔽房；"键盘""鼠标"寿命测试机，如：鼠标轨迹球MTBF恒温实验房；鼠标按键寿命测试机；3D滚轮实验机；键盘按键寿命测试机；键帽摩擦实验机；线材摇摆实验机；各种电子产品大型恒温恒湿老化房；元器件弯脚成型机；自动化成套控制系统；机电类产品配套；气动、电动单元集中控制软件等三十余种测试实验机及工控测试软件。

A new general kinetic equation was derived in which the effect of the removal of condensation water was taken into account completely, and was applied to the polyesterification kinetic study of AA/HPHP and AA/NPG. It was found that the reaction order of self-catalyzed polyesterification was not constant. For these polyesterifications, the reaction order was 2.5 at a low temperature, while 3.0 at a high temperature.

考虑缩合水的排除对反应体系的影响，用体积浓度单位推导出一个新的聚酯反应总包动力学方程，并应用到AA/HPHP和AA/NPG两个聚酯化反应的动力学研究中，研究发现，自催化聚酯反应的反应级数并不是固定值，对于AA/HPHP和AA/NPG两个聚酯化反应而言，低温时反应级数为2.5，高温时反应级数为3.0。

Rna - Rns, see "Partitioning of net radiation", for multiple plants the fraction of radiation to each plant is calculated in the radiation section, see "Partitioning of radiation between plants", es is the vapour pressure at saturation, ea is the actual vapour pressure,ρa is air density, cp is the specific heat of air at constant pressure, Lν is the latent heat of vaporisation,Δ is the slope of saturated vapour pressure versus temperature curve,γ is the psychrometer "constant", rs is an "effective" surface resistance and ra is the aerodynamic resistance.

潜在蒸腾量 Etp 根据Monteith(1965)给出的彭曼联合方程形式计算：式中： Rn 为对于蒸腾的有效净辐射量(也就是 Rna - Rns ，见"净辐射划分"-Partitioning of net radiation，对于多重植被，每一株植物的辐射比率的计算见辐射一节的"植物间的辐射划分"Partitioning of radiation between plants)； es 为饱和水气压；ea 为实际水气压；ρa 为空气密度； cp 为常压下的空气比热；Lν为汽化潜热；Δ为与温度曲线饱和水气压关系曲线斜率；γ为干湿球湿度计"常数"；rs 为"有效"表面阻力；ra 为气动阻力。

Rna - Rns, see "Partitioning of net radiation", for multiple plants the fraction of radiation to each plant is calculated in the radiation section, see "Partitioning of radiation between plants", es is the vapour pressure at saturation, ea is the actual vapour pressure,ρa is air density, cp is the specific heat of air at constant pressure, Lν is the latent heat of vaporisation,Δ is the slope of saturated vapour pressure versus temperature curve,γ is the psychrometer "constant", rs is an "effective" surface resistance and ra is the aerodynamic resistance.

潜在蒸腾量 Etp 根据Monteith(1965)给出的彭曼联合方程形式计算：式中： Rn 为对于蒸腾的有效净辐射量(也就是 Rna - Rns ，见&净辐射划分&-Partitioning of net radiation，对于多重植被，每一株植物的辐射比率的计算见辐射一节的&植物间的辐射划分&Partitioning of radiation between plants)； es 为饱和水气压；ea 为实际水气压；ρa 为空气密度； cp 为常压下的空气比热；Lν为汽化潜热；Δ为与温度曲线饱和水气压关系曲线斜率；γ为干湿球湿度计&常数&；rs 为&有效&表面阻力；ra 为气动阻力。

The company has advanced professional production equipment, the world's leading fully automated SMD production line and a series of quality assurance test equipment (automated solid crystalline machines, automatic wire bonders, die making machines, automatic cutting machine, automatic spectrophotometry machine, fitted with automatic machines, cold thermal shock machines, programmable temperature and humidity machine, fixed-type constant temperature and humidity machine, environmental testing machine, a computer analysis of microscope, etc.), with high-quality management team, a high level of technological development and a large number of well-trained skilled workers .

公司拥有先进的专业生产设备，世界领先的全自动 SMD 生产线及一系列品质保证测试设备（自动固晶机，自动焊线机，模造机，自动切割机，自动分光机，自动装带机，冷热冲击机，可程式恒温恒湿机，定点型恒温恒湿机，环境测试机，电脑分析显微镜等），拥有高素质的管理队伍，高水平的技术开发人员及一大批训练有素的熟练工人。

Moreover, the constant electrical conductivity of the asphalt concrete increased slowly with the temperature increasing, which presented a normal temperature effect. The mechanism of the electric conduction of the asphalt concrete can be explained by using electric channels and tunnel effect in which a net factor, n, which indicates the capability of conductive net formation in the concrete. Combined with the transfusion theory, a type of sea-island model is proposed.

导电沥青混凝土的导电行为可用导电通道和隧道效应进行分析，引进了考虑填料在基体中形成导电网络链难易程度的网络因子n，结合渗流导电理论，建立了导电沥青混合料的&海岛—网络&模型。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。