This paper compares the performance of ADTB-T system and DVB-T system between the two transmission situations of single transmitter and single frequency network used in the digital terrestrial television transmission system in Shanghai area.
主要介绍了上海地区数字电视地面传输系统中使用单频组网和单点发射两种情况下ADTB-T系统以及DVB-T系统的性能比较。
Epimorphisms,monomorphisms,extremal monomorphisms,and extremal epimorphisms of PTopi,the category of Ti pre-topological spaces and continuous mappings between them are characterized(i=0,1,2,3,312,4).
刻画了Ti预拓扑空间及连续映射的范畴PTopi中的满态射、单态射、极端单态射和极端满态射(i=0,1,2,3,3(1/2),4)。
Studies of the Electronic Control System in the Fuel Single Point Injection Engine;
发动机燃油单点喷射电子控制系统研究
fuel injector igniter
燃料喷射引燃点火器
FUEL INJECTOR FIRING SEQUENCE
燃油喷射器点火顺序
Research on Large Diameter Singular-Jet Grouting Method and Its Engineering Application;
大直径单管喷射（旋喷）注浆法及其工程应用研究
This would require approximately 4000 jets.
这个项目大约需要4000个喷射点。
Momentum of the injector effluent streams can contribute to lateral flow, either intentionally or unintentionally.
喷注器单元喷注射流的动量可能有意或无意地影响横向流。
a simple type of jet engine; must be launched at high speed.
一种简单的喷气发动机；必须以高速度发射。
Experimental research on single-layer tunnel lining of steel fiber shotcrete
隧道钢纤维喷射混凝土单层衬砌试验研究
Development of Control System for High Pressure Common Rail Injection System in Single-Cylinder Engine
单缸柴油机高压共轨燃油喷射控制系统的研究
Single shell Lining Technology and Application of Injection with Steel Fiber Reinforced Siliceous Concrete
硅粉纤维喷射混凝土单层衬砌技术及应用
Visualization of Fuel Spray for Multi-port Liquid Phase LPG Injection Engine;
多点电控液态LPG喷射发动机燃料喷雾的可视化试验研究
If you want to go through the rapids faster, try jetboating .
如果你想快点通过急流，可以尝试喷射快艇。
An Investigation on the Start Performance of a SI Methanol EFI Engine;
电控喷射点燃式甲醇发动机起动性能研究
Study on the Emission Performance of Dual Fuel Engine with Electronically-controlled Sequential LPG Injection;
电控多点LPG喷射双燃料发动机排放性能研究
Electronic Controlled Multi-point Sequential Injecting Gas Engine Research and Development;
电控多点顺序喷射气体发动机的研制开发
Testing and research on ignition waveform of electronically controlled fuel injection engine
电控汽油喷射发动机点火波形检测与研究
Features of the Working Principle of Electronic Fuel Injecting (EFI) Implementation in Diesel Engine
柴油发动机电控喷射执行器的工作特点
SIMULATION INVESTIGATION OF SUBMERGED JET FLOW FROM A STAR-SHAPED NOZZLE
淹没条件下星形喷嘴射流流动特点的模拟研究