Influence of Antenna Element Position Deviation on Radiation Performance of Helical Antenna Array.

The electrical performance of the feed array is degraded because of the position deviation of the array elements caused by manufacturing and processing, which cannot meet the high performance feeding requirements of large feed arrays. In this paper, a radiation field model of the helical antenna array considering the position deviation of array elements is proposed to investigate the influence law of position deviation on the electrical performance of the feed array. With the established model, the rectangular planar array and the circular array of the helical antenna with a radiating cup are discussed and the relationship between electrical performance index and position deviation is established by numerical analysis and curve fitting method.

[Treatment of penile strangulation and sexual psychological analysis of the patients].

Objective: To find the best treatment of penile strangulation and to analyze the sexual psychological factors of the patients.

Methods: We retrospectively analyzed the experiences in removing foreign objects around the penis in 21 patients aged 19 - 61 years with the strangulation time varying from 10 hours to 4 days. The objects were mostly made of metal or plastics.

Laparoscopic radiofrequency ablation of renal tumors: 32-month mean follow-up results of 106 patients.

Objective: To report our experience of laparoscopic radiofrequency ablation (RFA) on patients with renal tumors. RFA has been increasingly applied in the management of small renal tumors. However, it was performed mostly via percutaneous approach, with limited cases and a short follow-up period.

[Relationship between the intrapelvic perfusion pressure in minimally invasive percutaneous nephrolithotomy and postoperative recovery].

Objectives: To introduce the method to monitor intrapelvic perfusion pressure during minimally invasive percutaneous nephrolithotomy (MPCNL), and to observe the effect of high pressure intrapelvic perfusion on recovery.

Methods: The end of F5 ureteral catheter and aseptic transducer were connected by self-made connecter. During the operation, 46 renal calculi cases were monitored, and the early complication, such as fever, pain index, drop of hemoglobin, the stone-free rate and hospital stay were investigated.

[Detection of DD3 mRNA in the urine of prostate cancer patients and its clinical significance].

Objective: To detect the differential display code 3 mRNA (DD3 mRNA) in the urine sample of patients with prostate cancer and to evaluate its clinical significance.

Methods: DD3 mRNA in the urine collected from 48 patients with prostate cancer, 23 patients with benign prostate hyperplasia (BPH) and 9 healthy male volunteers was measured by reverse transcriptase polymerase chain reaction (RT-PCR).

Results: DD3 products could not be detected in the urine samples of the BPH patients and healthy male volunteers, but could in 39/48 urine samples of the patients with prostate cancer.

Cloning and identification of frc gene from Oxalobacter frmigenes.

The cloning and identification of frc gene from Oxalobacter formigenes in the intestines of Chinese people were conducted. The genomic DNA of Oxalobacter formigenes was extracted. frc gene fragment was amplified by polymerase chain reaction (PCR) and linked with pEGFP-C1.

[Clinical investigation of the treatment of children urethral calculi with pneumatic lithotripsy under ureteroscopy].

Objective: To evaluate the therapeutic effects of pneumatic lithotripsy on children urethral calculi.

Methods: Twenty-two cases of the male children with urethral calculi were treated with pneumatic lithotripsy under ureteroscopy.

Results: All the patients were treated successfully in a single procedure.

Clinical investigation on gastric oxalate absorption.

Objective: To study the stomach role in exogenous oxalate absorption.

Methods: The kinetic variation of urinary oxalate excretion (mg/min) in 10 healthy adults and 8 patients who underwent total gastrectomy was investigated before and after an oral spinach oxalate load. The bioavailability of the oxalate load in the healthy adults was calculated and compared with that in the patients.