hf造句
91. Purpose: High frequency low noise amplifier application, HF band amplifier application.
92. Finally, the antenna, ASK modulation, power supply of the tag, load impedance modulation, demodulation, power supply sensor and HF power amplifier were realized.
93. In this paper a new type of cascode HF resonant Eclass power amplifier using double triode is presented. The construction, character, working state and theorem of this circuit are also described.
94. Hydrofluoric acid ( HF ) is an extremely powerful inorganic acid and a vigorous dehydrating agent.
95. The results showed that HF acid has remarkable deashing capacity for coal and graphite with high Si and low Ca content.
96. Intorduction of air hole weld defect in Skelp connection Weiding of HF welded Steel Pipe Mill, analysis of the cause of formation, and bring forward means of troubleshooting.
97. Background: Add-on spironolactone therapy substantially improves clinical outcomes among patients with severe heart failure (HF) on standard therapy.
98. A continuous reveree - phfise chrornatographic separation procedure for Zr and Hf was offered.
99. In this article, Zirconium Glyphosate(ZrGP) was synthesized via reaction of glyphosate and Zirconyl dichloride using HF method.
100. More and more countries pay great attention to HF(high frequency) ground wave OTHR (over the horizon radar) for its military and civil foregrounds.
101. A method for super-resolution estimation of the ocean surface current for the HF ground wave radar is presented based on spatial correlation of the ocean surface current being analyzed.
102. Wanshicheng has exquisite craft, advanced plating line, stamping machine, HF welding machine and other relevant equipment.
103. Compared with the second- generation ALE, the third- generation HF automatic link establishment (3G-ALE) achieves better linking speed, network scope and traffic capacity.
104. This new powersupply system employs the technology of high frequency(HF), which overcomes many shortcomings such as heavy, bulkiness and inefficiency in traditional working frequency power supply.
105. It is also necessary to have the knowledges of reservoir mineralogy and the reaction kinetics of HF and aluminosilicate for the optimization of HF acidizing treatment.
106. High frequency band is a hostile electromagnetic environment. In this band atmospheric noise emitted by lightning in a short distance may badly affect HF GW radar's normal function.
107. In error-rate expression the effects of Rayleigh fading, frequency-and time-selective fading on HF ionospheric channels, quadruple frequency diversity and white noise have been considered.
108. The background signal of HF wave band achieves the expectant targets in the debugging of the signal electromagnetic environment simulator of the wireless communication system.
109. HF company is a high - tech enterprise specializing in researching, developing, manufacturing and selling relays.
110. Dose -response of rubber tree seedling on hydrogen fluoride(HF)was studied through an experiment of HF -fumigation.
111. Using modern spectrum analysis method and FFT, the specific value VLF/HF of Heart Rate Variability (HRV)of 19 healthy individuals and 10 hyperthyroid is analysed .
112. Quality square wave power supply, stable arc , HF arc stabilization not necessary.
113. Be sure your Gunn diode doesn't oscillate at audio or HF as well.
114. Absorption of HF may cause hypocalcemia due to HF's fixation of blood calcium.
115. HF inhaled in high concentrations may cause glottitis ( obstruction of the airway ) and acute pulmonary edema.
116. The second part analyzes the strategic practices of HF company and the exiting problems.
117. In recent years,[http://] HF adaptive communication system has become a popular way.
118. The simulation of radar echoes in one resolution cell is presented based on the theoretically analyzing HF sea clutter sea clutter reflection characteristic and sea echo spectrum stretching mechanics.
119. The backscatter sounding of high frequency can diagnose the real-time channel characters for shortwave communication or HF radar, which is great assistant to shortwave communication and HF radar.
120. To cope with the problem of phase shifts caused by different propagation paths (especially in HF links), the modulation is done in differential phase shift keying (DPSK).
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