After the clearing of the circuit trouble, the PTC Thermistor begins to cool and come back to the state of low resistance, and then the circuit enters normal working condition.
在电路故障排除后，过载保护 PTC 热敏电阻冷却并恢复到低阻态，同时电路也进入正常工作状态。
Electronic°now is the quality of management as the core of enterprise content management, providing customers with the following series of high-quality resistors: Universal and mine type varistor series, ceramic PTC series, organic polymer PTC series, high power surge suppression-type NTC series, thin-film resistor series, glass glaze film resistors series, wirewound resistor series.
现在爱特电子正以质量管理作为企业的核心管理内容，为客户提供以下系列的优质电阻器：通用及防雷型压敏系列、陶瓷PTC系列、有机高分子PTC系列、大功率浪涌抑制型NTC系列，薄膜电阻器系列，玻璃釉膜电阻器系列，线绕电阻器系列。
According to the data from the substitution reaction, the catalytic function of the phosphonium salts and the chiral quaternary ammonium salts has been compared. The followings are the main work of my paper. 1. It summarized the development of asymmetric synthesis and the latest studies of phase transfer catalyst; 2. Use PPh3 as the starting material, by the reaction of quaterization we get four common phosphnium salts as PTC-1、PTC-2、PTC-3、PTC-4; 3. Use L-Valine as the starting material, by the reaction of esterification, neutralization and quaterization, we get three chiral quaternary ammonium salts as PTC-5、PTC-6、PTC-7; ` 4. Use L-Valine as the starting material, through the reaction with Methyl chloroformate in order to protect the –NH2, and then react
本论文主要工作包括以下几个方面：1、综述了不对称合成的发展历程及相转移催化剂的进展和最新研究成果； 2、以三苯基磷为起始原料，合成了PTC-1、PTC-2、PTC-3、PTC-4 等四种普通的季鏻盐相转移催化剂； 3、以L-缬氨酸为起始原料，经过酯化、中和、季铵化等步骤，合成了PTC-5、PTC-6、PTC-7 等三种手性季铵盐相转移催化剂； 4、以L-缬氨酸为起始原料，用氯甲酸甲酯保护氨基，与L-苯丙氨酸甲酯反应，合成了一个环状二肽——2，5-二酮哌嗪环类化合物，它是一类新型的相转移催化剂； 5、对合成过程中涉及的产物和中间体用1HMNR、IR、EA 进行了系统的表征和分析； 6、将制得的催化剂PTC-1—PTC-7 应用于亲核取代反应，将PTC-8 应用于亲核加成反应，验证了催化效果； 7、根据实验结果及相关原理，探讨了PTC 的诱导机制。
Dimercaptoethyl sulfide, 2-phenylthioethane thiol and 2-mercaptomethyl-1, 4-dithiahexane were synthesized through thioureamethods, then the thiol methacrylate esters (MESDMA, MEPSMA andMMDMA, respectively) were prepared with reversed PTC method (droppedKOH solution.) in the first time. The source and purifying methods of theforeign substance bearing 〓 group in MES were discussed.
采用硫脲法制备了2，2'-二巯基乙硫醚、2-苯基硫代乙硫醇和2-巯基甲基-1，4-二硫杂环己烷，首次采用反滴KOH的PTC法合成了相应的丙烯酸硫醇酯(MESDMA、MEPSMA、MMDMA)；讨论了MES中含〓杂质的来源和消除方法，阐明了正常PTC法因存在硫醇与双键的加成反应而难以得到目的单体。
I Interoperability Tools/Toolkits.
PTC公司的互操作性软件工具
Different responses of nerve fibers in chorda tympani to quinine HCl and PTC were found, having the same bitter.
实验结果表明同为苦味的盐酸奎宁和PTC所引起的鼓索神经的反应方式是有区别的。
Niobium oxalate, manganese nitrate and n-ethyl silicate were coated on hydrothermally-synthesized barium titanate powders by a heterogeneous nucleation surface deposition method, leading to the homogeneous mixing of Nb2O5, MnO2, SiO2 and BT powders.
采用非均匀形核表面淀积法，在水热钛酸钡纳米晶粉体表面包覆Nb、Si、Mn，实现了Nb、Si、Mn与钛酸钡粉体的均匀混合。研究了掺杂量和烧结制度对PTC陶瓷性能的影响。
February 21, 2007PTC Therapeutics of South Plainfield, N. J., will test a higher dose of its experimental compound PTC124 in approximately 12 boys with Duchenne muscular dystrophy caused by a premature stop codon mutation.
位在纽泽西州-南普兰费得的 PTC Therapeutics 公司将使用更高剂量的 PTC124 为大约12位裘馨型肌萎缩症病童进行治疗基因过早停止编码突变的试验。
When CB loading is lower than the upper limit of percolation region, PTC effect becomes unstable. When CB loading is higher than the upper limit of percolation region, composites'room temperature resistivity and PTC intensity decrease gradually with CB loading increasing. When CB loading is around the upper limit of percolation region, PTC intensity exhibits maximum.
当炭黑填充量低于渗滤区域的上限时，复合材料呈现不稳定的PTC效应；当炭黑填充量高于渗滤区域的上限时，复合材料的室温电阻率和PTC强度随炭黑填充量的增加而逐渐降低；炭黑填充量在渗滤区域上限附近，可产生最大PTC强度。
Material and Method: Study the productivity of 18F-FDG with different volume (K2CO3, IL, acetonitrile). 1, 3, 4, 6-tetra-O-acetyl-2-O-trifluromethanesulfonyl-D-mannopyanose 25mg precursor and 1 -Butyl-3-methylimidazolium trifluoromethane sulfonate as PTC.
材料和方法：采用1，3，4，6-四－氧－乙酰基－2-氧－三氟甲磺酰－D-吡喃甘露糖作为前体，在不同K2CO3体积、离子液体积、前体量时18F-FDG合成效率及放射化学纯度。
As a result, measurement of the PTC element parameters is very important for its theoretical study and application.
因此，PTC元件主要性能参数的测定，对其理论研究和实际应用都具有十分重要的意义。
Effects of doped amount and sintering conditions on the properties of the PTC ceramics were studied.
结果表明，通过表面包覆工艺进行Nb掺杂的BT，在1 220℃已半导化，在1 250℃烧结的x为0.18%的BT陶瓷，其ρ25为4.3？。
The burning system has a great influence on the dielectric properties of BaTiO3 based PTC ceramics.
1烧成制度与PTC效应烧成制度对P T C陶瓷的显微结构及晶粒的半导化等有很大影响[1-2]。
The significant progress that we have made with PTC124 is a result of our unique drug discovery approach as well as the extraordinary support that we have received from the physician, patient, advocacy and regulatory communities.
令人鼓舞的数据，从第一期的第2 A研究表明，PTC的可能会成为一个非常重要的药物用于治疗的CF ，在10 ％的患者进行点突变。
PTC suppressor connects with the contactor coil with parallel connection, which can quickly and effectively reduced over-voltage wave, control relative high frequency, protect the electronic equipment and contact point of contactor.
本产品与接触器线圈并联连接可以迅速有效降低斩波，抑制与其相关的高频率，保护电子设备和接触器触点。
This paper described the design of constant current discharging device based on thermal sensitive element of PTC, including discharging battery at constant current and limiting current simulation load of charging sets.
文章介绍了一种采用PTC热敏元件设计的恒流放电装置，着重介绍了对蓄电池组的恒流放电和作为充电机的限流模拟负载的工作原理，实现对蓄电池恒流放电。
With the advantages of variable electrical conductivity in a large range, excellent moldability, flexibility, lightweight and cost effectiveness, etc.
不同的PTC材料，主要取决于其原材料性质、组成及制造工艺，呈现不同的PTC效应。
As for the partial or segmental type, PTC can help diagnose; But for the diffusing type, PTC often fails to succeed.
对于局部型或节段型，PTC 可以帮助诊断；但对于弥漫型，PTC 常难以成功。
Proposes a new composite structure of PTC thick-film circuit based on 1Cr18Ni9 stainless steel substrate. Application design technology of PTC electronic pastes is also investigated according to expansion coefficients of 1Cr18Ni9 stainless steel and electric characteristic of circuit elements.
提出基于1Cr18Ni9不锈钢基片的PTC厚膜电路的组成结构，并根据1Cr18Ni9的膨胀系数和电路元件的电气特性实现了厚膜电路PTC电子浆料的应用设计技术。
A/C system, PTC, Cooling Module, HVAC model, Pipe Ass'Y etc.
系统集成，冷却模块总成，空调箱总成等。