hf造句
61. The mapping relation can be used to predict the critical frequency and the HF communication channel.
62. HF ultimately diffuses down to the troposphere where it is removed by wet deposition.
63. The communication simulation model of HF multitone parallel transmission is established, and the anti-jamming performance of narrowband and broadband is analyzed based on the model.
64. The main spectral components are distinguished in the heart rate variability spectrum: ultra low frequency(ULF), very low frequency(VLF), low frequency(LF), high frequency(HF) components .
65. HF radio communication has a significant communication blind zone in the range of 200 kilometers usually. This disadvantage restricts its application in the near range tactical mobile communication.
66. A reliable way to improve the quality of spiral pipe was the substitution of high frequency butt welding for HF lap welding.
67. In practical applications the diameter and height of the induction coil have the same order of magnitude, hence the end effect is unnegligible in HF (high frequency) plasma theory.
68. Frequency monitor system(FMS) can offer right work frequency for HF radar in real time.
69. The multi-tone interferences suppression in HF serial data transmission systems is analysed.
70. After returning to HF - HD for 4 months, all measured parameters returned to their respective baseline alles.
71. Background Prediction of prognosis remains a major unmet need in new - onset hea rt failure ( HF ) .
72. Taking on route switchover between LAN and High-Frequency channel and as a key component of HF IP network, HF IP router would be a development direction for future HF communication.
73. The mass spectra of ferrocenyl - ? ? - diketonate chelates of Ti, Zr, Hf ( 1 - 6 ) and substituted ferroceoyl - titanocene complexes ( 7 - 8 ...
74. Method:32 patients with telophase of uraemia were applied to HF, their electronencephalograth(EEG) were tested before HF and six months after HF.
75. Radar echo signal processing results show the validness of the above methods for the detection and direction finding of non-stationary targets with broad-beam HF radars.
76. This paper introduces a negative feedback instrument of HF electrosurgery. It dispels the deficiency in operation of benign prostatic hyperplasia and protected the patient from injury.
77. Background: Cardiac resynchronization therapy improves exercise tolerance and survival in patients with advanced congestive HF and dyssynchrony.
78. The poor channel condition is the bottleneck for the High Frequency(HF) communications to support the high rate transmission for many years.
79. HF ground wave over - the -horizon radar is playing a more and more important role in modern wars and civil projects.
80. With 16 million HF patients in Europe and the USA, new strategies are indisputably needed.
81. The HF Broadband Receiver is a focus of research in the domain of HF receiving in recent years, and the receivers channelization is one of the very important parts.
82. Hydrofluoric acid (HF), a colorless inorganic acid with mild irritating odor, is used extensively in various industries, such as the semiconductor industry and the electropolishing of metal.
83. Conclusion The results showed HF acid etching technique had a positive influence on the bonding strength of porcelain to enamel.
84. The passive crossover network features a thermal protection system on the HF section providing audibly transparent protection for the compression driver.
85. The fully digitalized receiver is the important basis for software radio. Some key technologies about how to realize the HF ground wave radar receiver based on the HSP50216 are addressed.
86. Methods The mice were randomly divided into vaseline ointment(FSL) group, Shengjiyuhong ointment(YH) group and 10%, 20%, 30% HF group, and external used corresponding drugs on skin.
87. The absolute measure is less than a HF time period , which is independent of measurement period.
88. The third chapter discusses RFI suppression in HF radars in detail.
89. Objective:To evaluate the clinical efficacy of Bisoprolol on type2diabetes mellitus(2-DM)with symptomless heart failure(HF).
90. HF real time frequency selection (RTFS) is a kind of frequency-adaptive technology which is to improve the shortcomings of HF channel.
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