一顶帐篷八个门

人物马老师、小猪、小兔、小牛、小象、小猫、小狗、小羊。

Power-Effective in the Cell Sectorization Using Wide-Beam and Narrow-Beam for Multi-hop Relay Network

Multi-hop relay is a significant topic in the wireless communication and it is provisioned in the 802.16j standards.At present,the major research on multi-hop relay is focused on the capacity,coverage,coordination,throughput,etc.But in this paper,a new concept about power-effective was discussed.Then,two power-effective coverage extension methods using two sectorized cellular approaches were introduced,i.e.,the widebeam three sector cell(WBTC) and the narrow-beam three sector cell(NBTC).Under such topologies,the consumption of power and optimal numbers of base stations(BSs) and relay stations(RSs) with respect to various user traffic densities were investigated.Finally,it is found that the performance of WBTC is better than NBTC.

New approach to anal cancer:Individualized therapy based on sentinel lymph node biopsy

Oncological treatment is currently directed toward a tailored therapy concept.Squamous cell carcinoma of the anal canal could be considered a suitable platform to test new therapeutic strategies to minimize treatment morbidity.Standard of care for patients with anal canal cancer consists of a combination of radiotherapy and chemotherapy.This treatment has led to a high rate of local control and a 60% cure rate with preservation of the anal sphincter,thus replacing surgical abdominoperineal resection.Lymph node metastases represent a critical independent prognostic factor for local recurrence and survival.Mesorectal and iliac lymph nodes are usually included in the radiation field,whereas the inclusion of inguinal regions still remains controversial because of the subsequent adverse side effects.Sentinel lymph node biopsies could clearly identify inguinal node-positive patients eligible for therapeutic groin irradiation.A sentinel lymph node navigation procedure is reported here to be a feasible and effective method for establishing the true inguinal node status in patients suffering from anal canal cancer.Based on the results of sentinel node biopsies,a selective approach could be proposed where node-positive patients could be selected for inguinal node irradiation while node-negative patients could take advantage of inguinal sparing irradiation,thus avoiding toxic side effects.

Sound transducer calibration of ambulatory audiometric system utilizing delta learning rule

An efficient calibration algorithm for an ambulatory audiometric test system is proposed. This system utilizes a personal digital assistant (PDA) device to generate the correct sound pressure level (SPL) from an audiometric transducer such as an earphone. The calibrated sound intensities for an audio-logical examination can be obtained in terms of the sound pressure levels of pure-tonal sinusoidal signals in eight-banded frequency ranges (250, 500, 1 000, 2 000, 3 000, 4 000, 6 000 and 8 000 Hz), and with mapping of the input sound pressure levels by the weight coefficients that are tuned by the delta learning rule. With this scheme, the sound intensities, which evoke eight-banded sound pressure levels by 5 dB steps from a minimum of 25 dB to a maximum of 80 dB, can be generated without volume displacement. Consequently, these sound intensities can be utilized to accurately determine the hearing threshold of a subject in the ambulatory audiometric testing environment.

27米纯电动双铰接大巴深圳首发 比亚迪“黑科技”再拓造车边界

公交车上,遇到熟人怎么打招呼?在比亚迪K12A上,点个头可能不行,因为中间可能隔着27米、7个门、250个人……所以,这辆全球最长的纯电动大巴上的“社交主动权”取决于你,是隐身于人海,还是跨越人海来一次偶遇,全看你心情。很快,这个场景会在国内外的BRT线路上真实上演。4月1日,比亚迪在深圳总部举行了K12A纯电动双铰接大巴的首发仪式。这款受南美市场启发并接下了当地技术专家判断10年后才能实现的技术挑战的车型,让记者再次看到了比亚迪对纯电动客车产品和技术边界的探索。