摘要：Adaptive digital filtering has traditionally been developed based on the minimum mean square error （MMSE） criterion and has found ever-increasing applications in communications. This paper presents an alternative adaptive filtering design based on the minimum symbol error rate （MSER） criterion for communication applications. It is shown that the MSER filtering is smarter, as it exploits the non-Gaussian distribution of filter output effectively. Consequently, it provides significant performance gain in terms of smaller symbol error over the MMSE approach. Adopting Parzen window or kernel density estimation for a probability density function, a block-data gradient adaptive MSER algorithm is derived. A stochastic gradient adaptive MSER algorithm, referred to as the least symbol error rate, is further developed for sample-by-sample adaptive implementation of the MSER filtering. Two applications, involving single-user channel equalization and beamforming assisted receiver, are included to demonstrate the effectiveness and generality of the proposed adaptive MSER filtering approach.

摘要：The downlink minimum bit error rate (MBER) transmit beamforming is directly designed based on the uplink MBER receive beamforming solution for time division duplex (TDD) space-division multiple-access (SDMA) induced multiple-input multiple-output (MIMO) systems, where the base station (BS) is equipped with multiple antennas to support multiple single-antenna mobile terminals (MTs). It is shown that the dual relationship between multiuser detection and multiuser transmission can be extended to the rank-deficient system where the number of users supported is more than the number of transmit antennas available at the BS, if the MBER design is adopted. The proposed MBER transmit beamforming scheme is capable of achieving better performance over the standard minimum mean square error transmit beamforming solution with the support of low-complexity and high power-efficient MTs, particularly for rank-deficient TDD-SDMA MIMO systems. The robustness of the proposed MBER transmit beamforming design to the downlink and uplink noise or channel mismatch is investigated using simulation.

摘要：Background： Allergic rhinitis（AR） is defined as an immunoglobulin led atopic disorder that affects the nasal mucosa. Moxibustion on herbs, a common complementary and alternative medicine approach, is frequently used for treating AR in clinical practice. Western medicine is good at quick symptomatic relief,while offer little or no sustainable and steady long-term effect. Little established evidence is available to support the long-term effectiveness of moxibustion on herbs for ***： This study is a randomized controlled trial to assess the long-term effectiveness of moxibustion on herbs in moderate-severe persistent AR ***： The study sample size is 56 patients. Eligible patients with moderate-severe persistent AR will be randomized into a moxibustion on herbs combined with conventional treatment group（MOHCT group） and a conventional treatment group（CT group） in a 1：1 ratio. Patients in the MOHCT group will receive a 30-min moxibustion on herbs treatment on Zhiyang（至阳 GV 9）, Dàzhuī（大椎 GV 14） and bilateral Shenshu（肾俞 BL 23）, Fèishū（肺俞 BL 13） for a total of 12 times on the basis of conventional treatment, while those in the CT group will receive conventional treatment alone. The primary outcome measure is VAS score for total nasal symptoms, which will be obtained via a self-recorded AR diary. The secondary outcome measures include the average occurrence of symptoms per week, use of medication and Rhinoconjunctivitis Quality of Life Questionnaire（RQLQ）.Discussion： The objectives of this study include（1） to evaluate the long-term effectiveness and safety of moxibustion on herbs for treating AR;（2） to evaluate whether moxibustion on herbs can reduce the frequency of AR symptoms in patients with moderate-severe persistent allergic rhinitis. The finding of this study will provide evidence on the long-term effectiveness of moxibustion on herbs for moderatesevere persistent AR.

摘要：The airborne conformal array(CFA)radar's clutter ridges are range-modulated,which result in a bias in the estimation of the clutter covariance matrix(CCM)of the cell under test(CUT),further,reducing the clutter suppression performance of the airborne CFA *** clutter ridges can be effectively compensated by the space-time separation interpolation(STSINT)method,which costs less computation than the space-time interpolation(STINT)method,but the performance of interpolation algorithms is seriously affected by the short-range clutter,especially near the platform *** distributions of CFA are free,which yields serious impact that range spaces of steering vector matrices are non-orthogonal complement and even no longer ***,a new method is proposed that the shortrange clutter is pre-processed by oblique projection with the intersected range spaces(OPIRS),and then clutter data after being pre-processed are compensated to the desired range bin through the STSINT *** OPIRS also has good compatibility and can be used in combination with many existing *** the same time,oblique projectors of OPIRS can be obtained in advance,so the proposed method has almost the same computational load as the traditional compensation *** addition,the proposed method can perform well when the channel error *** simulation results verify the effectiveness of the proposed method.

摘要：4,6-α-葡萄糖基转移酶(4,6-α-GTs)能以直链淀粉为底物合成含α(1-6)键的α-葡聚糖,在酶法合成膳食纤维中具有很大的应用潜力。根据4,6-α-GTs氨基酸序列中的保守区段设计引物,从发酵乳杆菌Lactobacillus fermentum基因组中PCR扩增得到一条假定GTFB-like 4,6-α-GTs基因(命名为gtf16),构建重组质粒pET15b-gtf16并在宿主大肠杆菌Escherichia coli BL21(DE3)成功表达,纯化后对其进行酶学表征。结果表明,该酶最适pH为5.0,最适温度为40℃。通过薄层色谱、NMR光谱、水解酶水解等检测手段对Gtf16酶转化产物进行系统的表征,发现其产物具有以下特征:与已报道的来源于罗伊氏乳杆菌Lactobacillusreuteri121菌株的4,6-α-葡萄糖基转移酶-GtfB与直链淀粉作用后的产物异麦芽寡糖结构类似;产物键型中α(1-6)键占比可达75%,产物平均分子量为23 793 Da;产物被消化酶水解后得到的抗消化成分含量可达88.22%。

摘要：针对自由锻生产的钢质传动盘,设计模锻件及锻造模具并制定锻造工艺。运用Deform-3D模拟软件对传动盘成形过程进行数值模拟,研究其金属流动过程型腔充满性和折叠缺陷等情况,确定工艺中的隐藏缺陷。重新设计镦粗模及锻造工艺过程,优化金属流动,并通过模拟验证新的锻造方案,确定后续试制方案。最后,通过传动盘的热模锻生产试验,得到了符合质量要求的锻件。结果证明,数值模拟能够较好地反映锻造过程金属流动及最终成形效果,有效指导工艺设计,减少试制次数,从而缩短产品的研发周期,降低生产成本,也为后续其他锻件试制提供参考。

摘要：运用文献资料、逻辑分析、专家访谈等方法,研究了武术短兵与学校教育价值理念相融合的现实意义,探讨了武术短兵融入学校体育教育的成行路径,研究认为:紧扣第一粒学校武术短兵发展的扣子,加强教育顶层设计;重构学校武术信任机制,有效融入学校教育体育;立足校园文化建设,助力武术短兵国内国际双向多边扩大影响力。

摘要：针对移动通信网络数据业务急速增长带来的频谱资源紧张和系统能耗增加的问题,超蜂窝网络架构通过控制覆盖和业务覆盖的适度分离,引入基站的动态休眠和资源调度,从而大幅度提高网络的频谱效率和能量效率.但如何在不破坏用户终端协议栈的前提下实现蜂窝网络控制覆盖和业务覆盖的分离,是需要解决的问题.本文分析了GSM系统和LTE系统的主要信令流程及协议架构,提出了相应的超蜂窝网络设计方案,核心思路都是通过逻辑信道的划分实现基站功能的分离,进而实现控制覆盖和业务覆盖的分离.借助软件无线电设备,搭建了超蜂窝网络实验平台,对上述分离方案进行了初步的验证.本文还结合云计算技术和软件定义网络技术,设计了软件定义超蜂窝架构,并搭建了相应的云化超蜂窝网络演示平台.

摘要：根据某型加固显示器的应用环境及内部功能模块的热特性,选择强迫风冷的散热方式,并通过热仿真计算指导风扇选型,根据仿真结果验证散热方案的可行性。最终,依据试验结果验证仿真结果的准确性,为加固显示器的热设计提供思路。

摘要：【目的】本研究旨在分析南京市热河路法桐的健康状况,为法桐行道树后期的养护管理提供科学依据。【方法】研究采用实地调查法,在南京市热河路随机挑选70株法桐,观测并计算其树高、胸径、冠幅、冠高比、高径比、冠径比及土壤含水量等相关指标,运用主成分分析法和聚类分析法等综合评估法桐行道树的生长情况与健康状况,建立法桐健康状况综合评价模型,并进行健康等级分类。【结果】热河路法桐可划分为健康、亚健康、不健康三大类,70株样树中不健康的法桐占7.1%,亚健康的法桐占18.6%,健康的法桐占74.3%;健康、亚健康及不健康法桐的树干健康程度分别为70.76%、56.94%及30.25%,三者的树干健康情况存在较为显著的优劣区别;健康法桐树体长势好,枝叶生长茂密,外观分值平均为2.77;不健康法桐则树势较差,枝叶生长多稀疏,外观分值平均为1.16,亚健康法桐长势居于两者之间,外观分值平均为1.89。【结论】南京市热河路的法桐健康状况整体上表现为健康、生长良好,但仍需进一步养护管理,部分不健康法桐需要进行施药、换树等措施;在行道树养护前掌握法桐健康状况,从而采用针对性的养护及复壮措施,保持行道树的健康生长,维持城市街道优良景观。