Partial Doi-Hopf模的辫子Monoidal范畴

通过引入Monoidal Partial Doi-Hopf数组和模的概念及例子,得到Partial Doi-Hopf模范畴是一个Monoidal范畴.在此基础上根据多种重要模范畴的辫子结构构造了此范畴的辫子,并得到了使Partial Doi-Hopf模范畴成为辫子Monoidal范畴的充要条件.

Laser pulse modulation instabilities in partially stripped plasma

The laser pulse modulation instabilities in partially stripped plasma were discussed based on the phase and group velocities of the laser pulse and the two processes that modulation instabilities excited. The excitation condition and growth rate of the modulation instability were obtained. It was found that the positive chirp and competition between normal and abnormal dispersions play important roles in the modulation instability. In the partially stripped plasma, the increased positive chirp enhances the modulation instability, and the dispersion competition reduces it.

Improved partial response maximum likelihood method combining modulation code for signal waveform modulation multi-level disc

In this paper, we describe an improved adaptive partial response maximum likelihood （PRML） method combining modulation code tbr signal waveform modulation multi-level disc. This improved adaptive PRML method employs partial response equalizer and adaptive viterbi detector combining modulation code. Compared with the traditional adaptive PRML detector, the improved PRML detector additionally employs illogical sequence detector and corrector. Illogical sequence detector and corrector can aw）id the appearance of illogical sequences effectively, which do not follow the law of modulation code for signal waveform modulation multi-level disc, and obtain the correct sequences. We implement the improved PRML detector using a DSP and an FPGA chip. The experimental results show good performance. The higher efficient and lower complexity can be obtained by using the improved PRML method than by using the previous PRML method. Meanwhile, resource utilization of the improved PRML detector is not changed, but the bit error rate （BER） is reduced by more than 20%.

Selective partial salivary glands sparing during intensity-modulated radiation therapy for nasopharyngeal carcinoma

Objective This study evaluated the dosimetric consequences of selective partial salivary gland sparing during intensity-modulated radiotherapy(IMRT) for patients with nasopharyngeal carcinoma(NPC).Methods Ten patients with NPC were enrolled in the study.Two IMRT plans were produced for each patient:conventional(control) and partial salivary glands-sparing(treatment),with dose constraints to the entire parotid glands or partial salivary glands(including the parotid and submandibular glands,delineated with the adjacent distance of at least 0.5 cm between the glands and PTV,the planning target volume) in planning,respectively.Dosimetric parameters were compared between the two plans,including the V_(110%),V_(100%),V_(95%)(the volume covered by more than 110%,100%,or 95% of the prescribed dose),Dmin(the minimum dose) of PTV,homogeneity index(HI),conformity index(CI),and the mean dose and percentage of the volume receiving 30 Gy or more(V_(30)) for the parotid glands and submandibular glands.Results Treatment plans had significantly lower mean doses and V_(30) to both the entire parotid glands and partial parotid glands than those in control plans.The mean doses to the partial submandibular glands were also significantly lower in treatment plans than in control plans.The PTV coverage was comparable between the two plans,as indicated by V_(100%),V_(95%),Dmin,CI,and HI.The doses to critical structures,including brainstem and spinal cord,were slightly but not significantly higher in treatment plans than in control plans.Conclusion A selective partial salivary gland-sparing approach reduces the doses to parotid and submandibular glands during IMRT,which may decrease the risk of post-radiation xerostomia while not compromising target dose coverage in patients with NPC.

群partial缠绕结构

首先引入了群partial缠绕结构和群partial缠绕模,并给出例子和性质.最后构造了从群partial缠绕模范畴到模范畴的忘却函子.

基于空间光调制器的激光光束宽度调节装置

为了满足激光产业对光束宽度测量装置的溯源要求,提升激光光束宽度校准能力,针对400~700 nm波段的激光器不同光束宽度校准的需求,设计了一套基于空间光调制器的激光光束宽度可调节装置,用于光束质量分析仪或激光光斑测量仪的校准。实验结果表明该装置在0.1~5.0 mm的宽度范围连续可调;利用部分相干光束抗环境扰动能力强的特点,其短期稳定性达99.5%,长期稳定性达99.1%,优于参考激光器96.8%的短期稳定性和96.3%的长期稳定性。此外,基于空间光调制器优越的光束整形能力,该装置可将输入的非规则光束输出为高斯光束。

偏Doi-Hopf模的Maschke型定理

通过引入偏Doi-Hopf模积分映射的概念,证明了经典表示理论中的Maschke型定理在偏Doi-Hopf模条件下仍成立,即如果(H,A,C)是带有正规积分映射的偏Doi-Hopf数据,映射f:M→N是偏Doi-Hopf模同态,则只要f作为右A-模映射存在截面映射(收缩映射),则f作为偏Doi-Hopf模映射也存在截面映射(收缩映射).

偏Doi-Hopf群结构

通过引入偏Doi-Hopf群结构和偏Doi-Hopf群模的概念,推广了Doi-Hopf结构,并给出其应用实例和基本的代数性质.综合群余代数和偏缠绕结构的思想构造了从偏Doi-Hopf群模范畴到模范畴的忘却函子,并证明了它有右伴随函子.

Partial缠绕模的辫子monoidal范畴

给出了使partial缠绕模范畴成为辫子monoidal范畴的充要条件.

Partial H-Hopf群模范畴

首先引入Partial H-Hopf群数组和Partial H-Hopf群模的定义,然后给出相关例子,最后证明了从PartialH-Hopf群模范畴到模范畴的忘却函子有伴随函子.

偏Doi-Hopf π-模范畴和函子（英文）

设π-是一个群.本文我们引入了Hopf π-代数上的模的Doi-Hopf π-概念.得到了偏Doi-Hopf π-模范畴上的忘却函子可分的充要条件,其中忘却函子忘却的是π-A作用.作为应用,我们证明了偏Doi-Hopf π-模范畴上的Maschke型定理.

基于RFSoC的可重配置SAR收发模块设计与实现

数字收发模块包括信号的产生、采集及预处理等功能模块,在合成孔径雷达系统中具有重要作用。传统收发模块设计方案存在工作模式单一、通用性和灵活性较差等缺陷。针对上述问题,该文提出了一种基于射频片上系统的可重配置数字收发模块,将射频转换器、可编程逻辑以及片上处理器集成在单个芯片内,结合动态部分可重配置策略,能够根据需求实时调整转换速率,在极大提升了模块集成度、灵活性和通用性的同时,降低了系统的体积与功耗。

Partial crossed模

首先引入了partial crossed模的概念并给出例子,证明了实际上它是一种特殊的partial Doi-Hopf模.

High-voltage super-junction lateral double-diffused metal-oxide semiconductor with a partial lightly doped pillar

A novel super-junction lateral double-diffused metal-oxide semiconductor （SJ-LDMOS） with a partial lightly doped P pillar （PD） is proposed. Firstly, the reduction in the partial P pillar charges ensures the charge balance and suppresses the substrate-assisted depletion effect. Secondly, the new electric field peak produced by the P/P junction modulates the surface electric field distribution. Both of these result in a high breakdown voltage （BV）. In addition, due to the same conduction paths, the specific on-resistance （Ron,sp） of the PD SJ-LDMOS is approximately identical to the conventional SJ-LDMOS. Simulation results indicate that the average value of the surface lateral electric field of the PD SJ-LDMOS reaches 20 V/μm at a 15 μm drift length, resulting in a BV of 300 V.

Feasibility of the partial-single arc technique in RapidArc planning for prostate cancer treatment

The volumetric modulated arc therapy(VMAT)technique,in the form of RapidArc,is widely used to treat prostate cancer.The full-single arc(f-SA)technique in RapidArc planning for prostate cancer treatment provides efficient treatment,but it also delivers a higher radiation dose to the rectum.This study aimed to compare the dosimetric results from the new partial-single arc(p-SA)technique with those from the f-SA technique in RapidArc planning for prostate cancer treatment.In this study,10 patients with lowrisk prostate cancer were selected.For each patient,two sets of RapidArc plans(f-SA and p-SA)were created in the Eclipse treatment planning system.The f-SA plan was created using one full arc,and the p-SA plan was created using planning parameters identical to those of the f-SA plan but with anterior and posterior avoidance sectors.Various dosimetric parameters of the f-SA and p-SA plans were evaluated and compared for the same target coverage and identical plan optimization parameters.The f-SA and p-SA plans showed an average difference of±1%for the doses to the planning target volume(PTV),and there were no clear differences in dose homogeneity or plan conformity.In comparison to the f-SA technique,the p-SA technique reduced the doses to the rectum by approximately 6.1%to 21.2%,to the bladder by approximately 10.3%to 29.5%,and to the penile bulb by approximately 2.2%.In contrast,the dose to the femoral heads,the integral dose,and the number of monitor units were higher in the p-SA plans by approximately 34.4%,7.7%,and 9.2%,respectively.In conclusion,it is feasible to use the p-SA technique for RapidArc planning for prostate cancer treatment.For the same PTV coverage and identical plan optimization parameters,the p-SA technique is better in sparing the rectum and bladder without compromising plan conformity or target homogeneity when compared to the f-SA technique.

Read channel for signal waveform modulation multi-level disc

A novel read channel for signal waveform modulation multi-level disc is presented in this paper. This read channel employs timing recovery system and partial response maximum likelihood detector. Compared to the previous read channel composed of level detection and run-length detection, the present read channel shows superiority in capacity increase and robust performance. Especially, relying on the partial response maximum likelihood detection, lower bit error rate can be obtained.

共高频母线电能路由器局部模块闭锁研究

以模块化多有源桥电路为基础的新型共高频母线结构的电能路由器由于具有变换环节少、功率密度高等特点,在交直流混合系统应用中具有显著优势。实际应用中,局部模块因故障保护或冗余控制等原因需封锁器件脉冲停运,但在杂散参数引发的高频振荡影响下仍能传输功率,可能造成系统安全问题。为保证装置的稳定运行,文中建立高频母线结构下的闭锁模块高频振荡模型,可快速计算不同工况下的电路稳态波形,由此分析局部模块闭锁后的系统振荡特性和模块功率传输行为,并提出于模块交流侧安装隔离开关的措施,分析隔离开关杂散参数对振荡特性和闭锁模块传递功率行为的影响。最后,在实际功率单元模块进行实验,仿真和实验对比验证了所提模型的准确性和隔离开关措施的可行性。

局部遮荫下基于IP&O-SSA的MPPT控制研究

为了解决传统最大功率点跟踪(maximum power point tracking,MPPT)控制算法在局部遮荫环境中易陷入局部最优的问题,以及智能优化算法寻优速度慢的问题,提出了一种基于自适应扰动观察(IP&O)和改进麻雀搜索算法(sparrow search algorithm,SSA)的复合IP&O-SSA。该算法对SSA加入了Tent序列初始化,对预警者加入了Levy飞行策略,再对P&O进行了自适应和滤波处理。该算法采用双层控制结构,先通过改进后的SSA进行全局搜索到最大功率点附近,再通过改进后的IP&O进行小步平缓搜索到跟踪最大功率点。通过在Simulink仿真标准环境、局部遮荫、环境突变3种情形,仿真结果表明:在标准环境下,该算法最先跟踪到最大功率点,收敛时间比改进前的扰动观察(P&O)和SSA缩短了3 ms、16 ms,跟踪效率高达99.99%;局部遮荫条件下,只有P&O会陷入局部最优,无法有效跟踪到系统的最大功率点,相较于改进前的SSA,该文算法的平均收敛时间缩短了8 ms,同时跟踪效率高达99.68%,提升了0.09%。验证了该算法适用于日常大部分应用情景,为提升光伏阵列的发电效率提供了理论控制算法基础,为之后的光伏阵列并网减少了不必要的功率损耗。

FBMC/OQAM中基于离散粒子群优化的峰均比抑制方法

部分传输序列(Partial Transmit Sequence,PTS)是降低正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)系统峰均比(Peak-to-Average Power Ratio,PAPR)的有效方法,但是PTS穷举法搜索最优解,使系统复杂度增加。针对这一缺点进行改进,提出了基于离散粒子群优化的部分传输序列(Partial Transmit Sequence based on Discrete Particle Swarm Optimization,PTS-DPSO)方法,并将其应用到基于偏移正交幅度调制的滤波器组多载波系统(Filter Bank Multicarrier with Offset Quadrature Amplitude Modulation,FBMC/OQAM)中。PTS-DPSO利用离散粒子群优化搜寻最优解,避免了系统复杂度的增加。通过仿真验证,PTS-DPSO可以有效抑制FBMC/OQAM系统过高的PAPR且误码率低。

基于游离氨基酸的烤烟配打模块香型判别方法研究

为明确不同香型烤烟配打模块游离氨基酸组分差异,并实现对清香型、中间香型及浓香型烤烟复烤模块的准确分类,选取7个清香型、7个中间香型和8个浓香型烤烟配打模块为研究对象,对其游离氨基酸含量进行OPLS-DA分析,结合SVM模型进行香型判别。结果表明:不同香型烤烟模块游离氨基酸总量范围为13141.72~27695.47μg/g,其中脯氨酸和天冬酰胺含量在各香型中占比最高,天冬氨酸、谷氨酸、甘氨酸、丙氨酸、胱氨酸、亮氨酸、酪氨酸、苯丙氨酸、4-氨基丁酸、赖氨酸、组氨酸、色氨酸、精氨酸和游离氨基酸总量在不同香型间存在显著性差异。丙氨酸和天冬氨酸在OPLS-DA分析中VIP值大于1且在不同香型间差异显著(p<0.05),可筛选为香型判定指标。基于21种游离氨基酸的前两种主成分构建的SVM模型对模块香型的判别率准确率为86.36%;基于筛选出的2个游离氨基酸特征指标构建的SVM模型判别准确率为90.91%。基于丙氨酸和天冬氨酸的SVM模型判别率和可信度都在较高水平,可应用于烤烟配打模块的香型判别。