Defining the We-map Reference Frames and Providing Mathematical Expressions for Transformation Relations

We-map is an interactive mobile map that can be easily communicated and applied on personal electronic devices,such as personal computers and mobile phones.Therefore,the study of direction systems and coordinate systems is critical,and exploring reference frames is essential in direction and coordinate systems.Despite its significance,existing research on We-map lacks specific solutions for the exploration of reference frames is indispensable for the establishment of accurate direction and coordinate systems.In this paper,we endeavor to address this gap by elucidating the significance of We-map reference frames,defining them with mathematical constraints,summarizing their nature and characteristics,deriving their transformation relationships and representing them through mathematical formulars and equations.Our work contributes to the fundamental theory of We-map and provides valuable systems and support for the mathematical foundation of We-map,map production,and platform development.Ultimately,this research serves to advance the development of We-map.

Narrowband interference suppression in TR-UWB system based on cognitive radio theory

A cognitive radio transmitted reference ultra-wideband（CR-TR-UWB） system is proposed to improve the performance of TR-UWB systems with narrowband interference（NBI） from primary users（PU）.The transmitter of the CR-TR-UWB system detects the band of PU,and then sends prolate spheroidal wave functions（PSWF） pulses with the same limited band as PU＇s to reduce interference with PU.The receiver uses a notch filter before autocorrelation to eliminate NBI from PU.The simulation results show that the bit error rate（BER） performance of the CR-TR-UWB system is close to that of TR-UWB systems without NBI when the system is interfered by single or double NBIs with a signal to interference ratio（SIR） of 0 dB,and if the signal to noise ratio（SNR） is 10 dB and the SIR varies from-20 to 10 dB,BER performance varies no more than an order of magnitude.The system has excellent resistance to NBI,strong robustness BER performance at different SNRs,and smaller interference with the same frequency band PU.

ARCADE 2 Spatial Roar, What Theory of Relation Reveals

The theory of Relation provides an explanation for the Arcade 2 excess. It assumes that the isotropic radio emission measured by the Arcade 2 Collaboration, which is 5 - 6 times brighter than the expected contributions from known extra-galactic sources, is the residue of an immense primitive energy of ordinary matter released by a relativistic bang almost 100 million years after the big bang, which gave the mass-energy the missing gravity to activate contraction. This relativistic bang, via a Lorentz energy transformation, would have released enormous energy held to be the source of the powerful radio noise detected by the NASA researchers. This transformation would have simultaneously triggered the formation of the first stars from dense gas and the reionization of less dense neutral gas. This departs from the idea that continuous reionization began after the formation of the first stars. We emphasize the importance of primordial magnetic fields, which would have generated significant density fluctuations during recombination and acted as a direct seed for cosmic structures. The first stars and galaxies were bathed in strong magnetic fields that gave rise to the radio microwave din (boom) discovered by Arcade 2. These intense magnetic fields alter the trajectory of charged particles zooming near the speed of light, triggering the space roar and emitting radiation that forms a synchrotron radio background. The theory of Relation offers an alternative to the Lambda-CDM cosmological model, which has become the standard model of the big bang, which leads straight to the vacuum catastrophe.

个体与集体时间自我评价:来自行为和ERP的证据

运用事件相关电位技术和时间自我参照任务,通过两个系列实验探讨了大学生的个体时间自我评价和集体时间自我评价。结果显示,被试采用更多积极词、更少消极词来评价过去、现在和未来的个体自我和集体自我,个体自我评价在过去、现在和未来维度上存在积极递增效应;个体自我和集体自我在过去和现在维度上的消极词比积极词诱发了更大LPC波幅,而未来维度上的积极词和消极词之间的LPC波幅无显著差异。这表明,中国大学生的个体时间自我评价和集体时间自我评价均具有跨时间的积极偏向。而且,个体与集体时间自我评价在神经生理水平上都存在负偏向效应。因此,中国大学生的集体时间自我评价与个体时间自我评价具有相似的认知神经特点,在一定程度上为依存型自我建构理论提供了支持证据。

藜叶片响应出芽短梗霉菌侵染内参基因筛选及光合作用相关基因表达分析

【目的】筛选适合出芽短梗霉菌株PA-2侵染藜的稳定表达的最适内参基因,并进行PA-2侵染下藜光合作用相关基因的表达分析验证。【方法】分别以菌株PA-2孢子侵染0、1、3、5、7 d的藜叶片和正常生长藜的根、茎、叶为供试材料,通过qRT-PCR技术和Ct值评估3个候选内参基因GAPDH、β-ACTIN、β-TUBULIN的表达稳定性,并利用筛选出的内参基因,对藜光合作用相关基因(LFRN、MDH、PetC、psaA、CAB40、psaN、BHY和MO_(2))的表达水平进行定量分析。【结果】在菌株PA-2侵染藜不同时间点和不同组织的样本中,藜最适内参基因为GAPDH,可用于后续分析光合作用相关基因的表达水平。以GAPDH作为内参基因检测8个光合作用相关基因的表达水平,在不同侵染时间点,8个光合作用相关基因的表达量均出现不同程度的下调,除MDH基因外,其余基因均在5 d时达到最低水平。其中PctC、psaN、CAB40、BHY、MO_(2)基因在藜受侵染0~1 d中下调表达,在3 d达到较高水平,后期表达量下调;pasA先上调表达后下调表达;LFRN在受侵染后持续下调表达;MDH在受侵染后先显著下调,在3 d达到较低水平,后上调表达。在藜受侵染的不同组织中,8个基因在藜叶中均有大量表达,其中MDH基因在茎中大量表达,PctC和CAB40在根中表达量最低,除MDH基因外,其余7个基因在不同组织中的表达量高低排序为:叶>茎>根。【结论】本研究为后续利用qRT-PCR分析藜基因表达及研究PA-2致病机理奠定基础。

联合战术通信系统的发展及其应用

联合战术通信系统(JTRS)是美军各层次网络空间能力建设和发展的重要通信装备,是实现其“战术级网络空间优势”的重大举措。针对JTRS最新动态及其调整变化,给出了JTRS的进展情况,包括JTRS电台演进和软件通信体系结构规范(SCA)标准;深入研究了JTRS电台体系架构和典型组网结构,并对JTRS的主要波形、相关电台进行了梳理分析与归纳总结,并对JTRS发展动态进行了分析展望。通过对JTRS发展及其应用进行深入研究,能够为战术互联网和新型软件无线电电台的发展提供借鉴,从而促进我国军事通信装备跨越式发展。

基于注意力与同指信息的对话级关系抽取

与传统的关系抽取任务相比,对话级关系抽取任务具有语言随意、信息密度低、人称代词丰富的特点。基于此,该文提出了一种基于注意力和同指信息的对话级关系抽取模型。模型采用TOD-BERT(Task-Oriented Dialogue BERT)和BERT预训练语言模型增强对话文本表示,通过注意力机制建模词与各种关系之间的相互影响,使模型能更多地关注有益信息。另外,该文提出的模型还融合了与人称代词相关的同指信息以丰富实体的表示。作者在对话级关系抽取数据集DialogRE上验证所提出模型的性能。结果表明,该模型在DialogRE测试集上的F1值达到了63.77%,较之于多个基线模型有明显提升。

Reference values of carotid intima-media thickness and arterial stiffness in Chinese adults based on ultrasound radio frequency signal:A nationwide,multicenter study

Background:Carotid intima-media thickness(IMT)and diameter,stiffness,and wave reflections,are independent and important clinical biomarkers and risk predictors for cardiovascular diseases.The purpose of the present study was to establish nationwide reference values of carotid properties for healthy Chinese adults and to explore potential clinical determinants.Methods:A total of 3053 healthy Han Chinese adults(1922 women)aged 18-79 years were enrolled at 28 collaborating tertiary centers throughout China between April 2021 and July 2022.The real-time tracking of common carotid artery walls was achieved by the radio frequency(RF)ultrasound system.The IMT,diameter,compliance coefficient,βstiffness,local pulse wave velocity(PWV),local systolic blood pressure,augmented pressure(AP),and augmentation index(AIx)were then automatically measured and reported.Data were stratified by age groups and sex.The relationships between age and carotid property parameters were analyzed by Jonckheere-Terpstra test and simple linear regressions.The major clinical determinants of carotid properties were identified by Pearson’s correlation,multiple linear regression,and analyses of covariance.Results:All the parameters of carotid properties demonstrated significantly age-related trajectories.Women showed thinner IMT,smaller carotid diameter,larger AP,and AIx than men.Theβstiffness and PWV were significantly higher in men than women before forties,but the differences reversed after that.The increase rate of carotid IMT(5.5µm/year in women and 5.8µm/year in men)and diameter(0.03 mm/year in both men and women)were similar between men and women.For the stiffness and wave reflections,women showed significantly larger age-related variations than men as demonstrated by steeper regression slopes(all P for age by sex interaction<0.05).The blood pressures,body mass index(BMI),and triglyceride levels were identified as major clinical determinants of carotid properties with adjustment of age and sex.Conclusions:The age-and sex-specific reference values of carotid properties measured by RF ultrasound for healthy Chinese adults were established.The blood pressures,BMI,and triglyceride levels should be considered for clinical application of corresponding reference values.

维格列汀原料药有关物质的合成

为更好地控制维格列汀原料药的质量,改进维格列汀杂质对照品合成方法,结合原料药生产工艺,合成了2个维格列汀原料药的工艺杂质。根据维格列汀原料药降解途径,合成了3个降解杂质。杂质合成无需柱层析,只需要通过简单的重结晶即可得到目标化合物。以核磁共振氢谱、碳谱和高分辨质谱对5个杂质进行了结构确证,通过高效液相测定,这5个杂质的纯度均高于95%,符合杂质定位和含量标定的要求,可以作为原料药检验用的杂质对照品。

切割事件句中容器量词的语义功能

本文讨论切割事件句(如,“他切了一盘西瓜”)中容器量词的语义功能,首先分析切割事件句的歧义性,指出宾语的指称变化可导致切割类动词,如“切”在“切分”义和“切除”义之间波动,并从意象图式的角度对这一现象进行解释。然后,文章举出包含容器量词的切割事件句的歧义现象,并指出意象图式说所面临的困境;进而提出“同量指称”假设,并在该假设的基础上对相关问题进行解释。文章认为,容器量词属于开放类词汇,这一特性一方面为它们的同量指称性的产生提供先决条件,另一方面又造成它们与名词搭配方面的语义选择限制。最后,文章对语义最小论的相关观点进行了讨论。

法莫替丁有关物质的合成

目的:为加强法莫替丁质量控制,研究并改进法莫替丁有关物质的合成方法,合成欧洲药典中收载的10个法莫替丁有关物质,为其质量研究提供对照品。方法:以法莫替丁原料药为起始原料,经酸水解、碱水解、氧化降解得到杂质C、D、F、I,其中杂质F继续与甲醇发生酯化反应得到杂质J;以3-(2-氨基-噻唑-4-基甲硫)-丙腈为起始原料经醇解、氨解或水解等反应合成杂质A、B、E、G;以脒基硫脲为原料经缩合与取代反应合成杂质H。结果:合成的10种法莫替丁有关物质均经高分辨质谱、核磁氢谱及核磁碳谱进行结构确证,通过高效液相测定纯度均>95%。结论:10种有关物质符合杂质对照品要求,可用于法莫替丁的质量研究和控制。

Reputation-Based Hierarchically Cooperative Spectrum Sensing Scheme in Cognitive Radio Networks

Cooperative spectrum sensing in cog- nitive radio is investigated to improve the det- ection performance of Primary User （PU）. Meanwhile, cluster-based hierarchical coop- eration is introduced for reducing the overhead as well as maintaining a certain level of sens- ing performance. However, in existing hierar- chically cooperative spectrum sensing algo- rithms, the robustness problem of the system is seldom considered. In this paper, we pro- pose a reputation-based hierarchically coop- erative spectrum sensing scheme in Cognitive Radio Networks （CRNs）. Before spectrum sensing, clusters are grouped based on the location correlation coefficients of Secondary Users （SUs）. In the proposed scheme, there are two levels of cooperation, the first one is performed within a cluster and the second one is carried out among clusters. With the reputa- tion mechanism and modified MAJORITY rule in the second level cooperation, the pro- posed scheme can not only relieve the influ- ence of the shadowing, but also eliminate the impact of the PU emulation attack on a rela- tively large scale. Simulation results show that, in the scenarios with deep-shadowing or mul- tiple attacked SUs, our proposed scheme ach- ieves a better tradeoff between the system robustness and the energy saving compared with those conventionally cooperative sensing schemes.

气象观测场在汽车试验场中的应用研究

汽车试验场作为汽车开展道路测试的重要场所,用于验证汽车产品的品质以及可靠性。除了场地道路外,气象条件作为汽车道路测试的重要一环,在《GB/T12534-1990汽车道路试验方法通则》中也有明确要求,如:试验时应是无雨无雾天气,相对湿度小于95%,气温0-40℃,风速不大于3m/s。同时气象条件也作为试验场道路管控的重要依据,实时风速、雨量、能见度等信息为场地管理者发布限速、限行、封场等通知提供必要参考依据,直接影响道路测试安全管控的及时性。因此,文章从气象观测场的建设、气象服务、异常天气道路管控等方面开展气象观测场在汽车试验场中的应用研究。

QoE Management for 5G New Radio

Quality of Experience(QoE)is used to monitor the user experience of telecommunication services,which has been studied for a long time.In universal terrestrial radio access network(UTRAN),evolved UTRAN(E-UTRA)and Long Term Evolution(LTE),QoE has also been specified for the improvement of user experience.The 5G New Radio(NR)technology is designed for providing various types of new services,and therefore operators have strong demand to continuously upgrade the 5G network to provide sufficient and good QoE for corresponding services.With new emerging 5G services,5G QoE management collection aims at specifying the mechanism to collect the experience parameters for the multimedia telephony service for IP multimedia subsystem(IMS),multimedia broadcast and multicast service(MBMS),virtual reality(VR),etc.Taking LTE QoE as a baseline,generic NR QoE management mechanisms for activation,deactivation,configuration,and reporting of QoE measurement are introduced in this paper.Additionally,some enhanced QoE features in NR are discussed,such as radio access network(RAN)overload handling,RAN-visible QoE,perslice QoE measurement,radio-related measurement,and QoE continuity for mobility.This paper also introduces solutions to NR QoE,which concludes the progress of NR QoE in the 3rd Generation Partnership Project(3GPP).

Knowledge and Practices of Health Professionals on the Optimization of Radiation Protection in Diagnostic Radiology in Children and Adults in the General Referral Hospitals of Bukavu in South Kivu, DRC

The aim of this research was to assess the knowledge and practices of radiological versus non-radiological health professionals on the optimisation of radiation protection in paediatric and adult radiology in BUKAVU hospitals. To achieve this, we surveyed a convenience sample of 73 health professionals including 23 radiologists working in the hospitals surveyed to assess knowledge and level of implementation of radiation protection principles. Also, physical parameters were taken for the calculation of entry doses in paediatric and adult radiology units for comparison with the International Commission on Radiological Protection (ICRP) diagnostic reference levels. After analysis of the data, the following was found: although radiologists have sufficient knowledge of radiation protection standards, technical constraints do not allow them to observe the dose limitation principle recommended by the ICRP. This is why several radiology departments, including those of the HPGRB, the MWANZI clinic and CIRIRI hospital, have proved to be very irradiating for children. However, radiologists and non-radiologists alike do not contribute positively to the optimisation of radiation protection in the diagnostic use of X-rays. Therefore, support in the implementation of radiation protection principles and regular monitoring of the units as well as replacement of non-standard equipment is necessary to promote patient and environmental safety by optimising radiation protection.

Reference satellite selection method for GNSS high-precision relative positioning

Selecting the optimal reference satellite is an important component of high-precision relat/ve positioning because the reference satellite directly influences the strength of the normal equation. The reference satellite selection methods based on elevation and positional dilution of precision （PDOP） value were compared. Results show that all the above methods cannot select the optimal reference satellite. We introduce condition number of the design matrix in the reference satellite selection method to improve structure of the normal equation, because condition number can indicate the ill condition of the normal equation. The experimental results show that the new method can improve positioning accuracy and reliability in precise relative positioning.

Antitumor and radiosensitization effect of 12C6+heavy-ion irradiation mediated by radiation-inducible gene therapy

Radio genetic therapy which combines gene therapy with radiotherapy has shown promising results in cancer treatment. In this study, an oncolytic adenovirusbased gene therapy system regulated by radiation was constructed to improve the cancer curative effect. This gene therapy system incorporated the radiation-inducible early growth response gene(Egr-1) promoter and the anticancer gene tumor necrosis factor-related apoptosis-inducing ligand(TRAIL). To confirm the antitumor effect of Ad-ET combined with^12C^(6+)tion irradiation, the survival and apoptosis fraction of tumor cells HT1080 and normal cells MRC-5 in combination treatment were detected by CCK-8 assay and FACS analysis. Then the expression levels of TRAIL gene and protein were tested by real-time PCR and western blotting. The results show that^12C^(6+)tion irradiation could induce cell growth inhibition and apoptosis by activating the TRAIL gene expression in tumor cells, while exhibiting no obvious toxicity to the normal lung cell line MRC-5. Theresults also demonstrate that use of an oncolytic adenovirusbased radiation-inducible gene therapy system together with^12C^(6+)tion irradiation could cause synergistic antitumor effect specifically in tumor cells but not in normal cells. The results indicate that the novel radio genetic therapy could potentiate radiation treatment by improving the safety and efficiency of monotherapy, and provide theoretical support for clinical application of combination treatment.

基于个体预测的动态多目标优化算法

为了快速追踪随环境变化的动态多目标优化问题的Pareto前沿,提出基于个体预测的动态多目标优化算法(IPS).利用参考点联系算法筛选出特殊点,该特殊点具有良好的收敛性和多样性,通过对特殊点集的预测快速响应环境变化.提出针对种群中心点预测的反馈校正机制,在预测非支配解集的过程中,对预测步长进行反馈校正,从而使预测更加准确;为了避免算法陷入局部最优,提出混合多样性维持机制,引入由拉丁超立方抽样和精度可控的突变策略分别产生的随机个体,以提高种群的多样性.将所提算法与其他4种动态多目标优化算法进行对比分析,实验结果表明,IPS能够平衡种群的多样性和收敛性,在FDA、DMOP、F5~F10系列问题上,实验结果优于其他4种算法.

A study of the strong pulses detected from PSR B0656+14 using the Urumqi 25-m radio telescope at 1540 MHz

We report on the properties of strong pulses from PSR B0656＋14 by analyzing the data obtained using the Urumqi 25-m radio telescope at 1540 MHz from August 2007 to September 2010.In 44 h of observational data,a total of 67 pulses with signal-to-noise ratios above a 5σthreshold were detected.The peak flux densities of these pulses are 58 to 194 times that of the average profile,and their pulse energies are 3 to 68 times that of the average pulse.These pulses are clustered around phases about 5-ahead of the peak of the average profile.Compared with the width of the average profile,they are relatively narrow,with the full widths at half-maximum ranging from 0.28 ° to 1.78 °.The distribution of pulse-energies follows a lognormal distribution.These sporadic strong pulses detected from PSR B0656＋14 have different characteristics from both typical giant pulses and its regular pulses.

正常儿童脉络膜血管指数分布特征及影响因素分析

目的应用扫频源光学相干断层扫描(SS-OCT)评估正常儿童黄斑区脉络膜血管指数(CVI)的分布特征,并探讨其影响因素。方法采用横断面研究,连续纳入2021年5—11月于郑州大学第一附属医院眼科就诊的6~12岁正常儿童63人,测量其等效球镜度数、眼轴长度及其他眼部生物学参数。并以黄斑为中心,采用SS-OCT血管成像测量黄斑区CVI及脉络膜厚度(ChT),根据ETDRS分区将图像划分为黄斑中心凹区(直径0~1 mm)、内环区(直径1~3 mm)和外环区(直径3~6 mm)。均选取右眼数据纳入统计分析,比较3个环区和内、外环区上方、颞侧、下方和鼻侧4个区域的CVI。采用单因素线性回归分析和多元线性回归分析3个环区的CVI与性别、眼轴长度、前房深度、ChT和瞳孔直径等参数的关系。结果黄斑中心凹区、内环区和外环区3个环区的CVI平均值分别为0.35±0.12、0.32±0.10和0.27±0.08,总体比较差异有统计学意义(F=10.96,P<0.001),其中3个环区的CVI两两比较差异均有统计学意义(均P<0.05)。内环区和外环区上方、颞侧、下方、鼻侧不同区域CVI比较,差异均有统计学意义(F环区=11.60,P=0.001;F部位=12.02,P<0.05),其中内环区上方和鼻侧CVI值低于颞侧,外环区上方、颞侧和下方CVI值高于鼻侧,外环区上方CVI低于内环区,差异均有统计学意义(均P<0.001)。经单因素线性回归分析,黄斑中心凹区、内环区和外环区ChT均是对应3个环区CVI的影响因素(均β=0.001,P<0.001)。瞳孔直径(β=0.034,P=0.038;β=0.040,P=0.003;β=0.024,P=0.011)和前房深度(β=0.097,P=0.034;β=0.097,P=0.013;β=0.061,P=0.032)均是黄斑中心凹区、内环区、外环区CVI的影响因素。经多重线性回归分析,建立的回归方程分别为:黄斑中心凹区CVI=0.001×黄斑中心凹区ChT+0.001×内环区ChT+0.001×外环区ChT-0.301(R 2=0.514,F=6.875,P<0.001);内环区CVI=0.001×黄斑中心凹区ChT+0.001×内环区ChT+0.001×外环区ChT+0.088×前房深度-0.307(R 2=0.603,F=9.870,P<0.001);外环区CVI=0.001×黄斑中心凹区ChT+0.001×内环区ChT+0.001×外环区ChT-0.135(R 2=0.601,F=9.781,P<0.001)。结论6~12岁正常儿童黄斑中心凹区的CVI较内环区和外环区高,且在内环区和外环区,均是鼻侧区域的CVI最低。ChT越厚的儿童,黄斑相对应的所有区域CVI越高;前房深度越深的儿童,内环区的CVI越高。