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系外地球科学卫星(ET)将通过采用空间大视场超高精度测光这一关键技术在国际上率先突破生命起源中的系外地球存在及其演化这一重大前沿科学问题. ET卫星将在日地拉格朗日L2点晕(Halo)轨道部署由6台广角凌星望远镜和1台微引力透镜望远镜构成的空间天文台, 结合凌星法和微引力透镜法, 利用空间超大视场和超高精度的光学测光观测, 首次发现富有重要意义、被广泛关注的系外地球, 并确定其发生率, 对目前了解甚少的类地行星和流浪行星进行国际上第一次大规模的种群普查, 首次发现流浪地球, 并确定其发生率, 揭示类地行星和流浪行星起源, 为地外生命探寻提供候选者和新方向. ET卫星的观测结果、统计研究以及和对理论的检验将回答系外地球在宇宙中有多普遍, 类地行星是如何形成和演化的, 流浪行星又是如何起源的这些亟待解决的前沿科学问题. 对ET卫星发现的系外地球样本的后随观测, 将精确测量其质量、密度和大气成分, 有助于深入分析宜居性特征. 此外, 对ET新发现的大量各种系外行星样本的研究, 以及对理论的检验将推动这些种类的行星形成和演化规律的更深入认识, ET的大量高精度、高频次和长基线测光数据将推动星震学、银河系考古学、时域天文学、双星和双星黑洞等领域的研究.

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Copyright of Electric Power is the property of Electric Power Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

随着智能交通系统领域大量移动终端设备的涌现，理解并准确预测移动目标轨迹有助于降低交通事故发生的概率，提高基于位置服务的智能交通应用的质量和水平。主要从数据驱动和行为驱动的角度对移动目标轨迹预测方法进行综述，首先对概率统计、神经网络、深度学习和混合建模等数据驱动方法进行比较；其次对动力学建模和目标意图识别等行为驱动方法的基本概念及研究现状进行概述；然后分别对目标轨迹重建、目标异常行为识别和导航路径规划等轨迹预测应用进行简要叙述；最后讨论了移动目标轨迹预测存在的主要问题以及未来的发展方向。

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Copyright of Journal of Drainage & Irrigation Machinery Engineering / Paiguan Jixie Gongcheng Xuebao is the property of Editorial Department of Drainage & Irrigation Machinery Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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采用常规直流与柔性直流混合的特高压多端直流输电系统是昆柳龙直流工程技术方案之一，对采用全桥和半桥混合拓扑的特高压柔性直流输电换流器充电时的均压问题进行分析，提出了两种不同的充电策略。研究了混合三端直流系统的启停顺控流程和直流线路瞬时故障穿越、重启策略。在RT-LAB中搭建三端混合直流输电系统，连接外部阀控装置进行实时仿真实验，实验结果验证了提出的充电策略的正确性，表明所提出的直流线路故障穿越和重启策略可以很好地实现系统穿越故障，使系统重新进入稳态。此外，在±10.5 kV/60 MW柔性直流背靠背样机上进行了充电策略验证和直流双极短路故障穿越后重启策略验证，充分验证了采用全半桥混合拓扑柔直系统的故障穿越能力。

针对柔性直流输电系统直流侧故障快速清除的难题，结合南澳多端柔性直流输电工程的实际生产应用需求，提出了一种新型机械式高压直流断路器拓扑方案，研制出了160 kV超快速机械式高压直流断路器产品，提出了一种采用发电机源提供电流来模拟直流故障的开断试验方法，并完成了双向大电流开断试验，开断电流大于9 kA、开断时间小于5 ms。研究并提出了160 kV机械式高压直流断路器工程应用技术方案，并完成南澳加装高压直流断路器示范工程的现场系统调试，试验结果表明其圆满地解决了南澳多端柔性直流系统第三站在线投切和直流线路故障隔离清除的难题，有效地提高了南澳多端柔性直流输电系统的灵活性和可靠性。

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Copyright of Food Research & Development is the property of Food Research & Development Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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Copyright of Journal of Drainage & Irrigation Machinery Engineering / Paiguan Jixie Gongcheng Xuebao is the property of Editorial Department of Drainage & Irrigation Machinery Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

To observe the effects of ultrasound-guided modified obturator nerve block (ONB) combined with remazolam anesthesia on obturator nerve reflex (ONR) and postoperative recovery of patients with transurethral resection of bladder tumors (TURBT). Methods One hundred patients with bladder tumor admitted to Qinhuangd ao Hospital from June 2019 to June 2021 were treated with TURBT. They were divided into conventional group (intraspinal anesthesia + traditional ONB anesthesia) and ultrasound group (intraspinal anesthesia improved ONB combined with remidazolam anesthesia under ultrasound guidance) with 50 cases in each according to different ONB methods. Perioperative indexes, hemodynamic indexes at different time points, intraoperative ONR occur- rence, complications and adverse anesthesia reactions were compared between the two groups. Results Compared with conventional group, ONB time, operation time, catheter indwelling time and hospital stay were shortened, and intraoperative blood loss was decreased in ultrasound group (P<0.05). Compared with the conventional group at 30 min after administration (T1) and at the end of operation (T2), the mean arterial pressure (MAP) and oxygen saturation (SaO) were increased in the ultrasound group (P<0.05). Compared with the conventional group, the incidence of ONR and bladder bleeding was decreased, and the incidence of postoperative bradycardia, nausea and vomiting were decreased in the ultrasound group (P<0.05). Conclusions Ultrasound-guided modified ONB combined with remazolam anesthesia can effectively improve perioperative indexes of TURBT, reduce intraoperative ONR and bladder bleeding, and have little influence on hemodynamics with few postoperative adverse anesthesia reactions. [ABSTRACT FROM AUTHOR]

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Aim To investigate the effect of jaranol on platelet derived growth factor-BB (PDGF-BB)-induced proliferation and migration of vascular smooth muscle cell(VSMC) as well as its possible mechanism. Methods Human aortic vascular smooth muscle cells (HA-VSMC)were treated with 25 μg/L PDGF-BB to induce proliferation and migration. The cells were divided into normal control group (NC group), PDGF-BB group, PDGF-BB+jaranol (10, 20 and 40 μmol/L) group, DMSO group. Cell counting Kit-8 (CCK-8) assay was used to assess proliferation ability of HA-VSMC, and Transwell assay was used to examin the migration ability of HA-VSMC. Western blot was used to detect the expression of autophagy related proteins including p62, LC3, mammalian target of rapamycin (mTOR) and phosphorylated mTOR (p-mTOR). Results After treatment with PDGF-BB, the proliferation and migration ability of HA-VSMC was notably upregulated (P<0. 01), while jaranol showed a significant and concentration-dependent inhibition effect on PDGF-BB-induced proliferation and migration of HA-VSMC (P<0. 05). Western blot results showed that compared with the PDGF-BB group, the protein expression levels of LC3Ⅰ and mTOR were significantly decreased in PDGF-BB+jaranol (40 μmol/L) group (P<0. 05); The expression levels of LC3Ⅱ/LC3Ⅰ, p62 and p-mTOR proteins were significantly increased (P <0. 05), and the effect of jaranol(40 μmol/L) and compound C on AMPK/mTOR signaling pathway of HA-VSMC induced by PDGF-BB was consistent. Conclusion Jaranol can inhibit the abnormal proliferation and migration of HA-VSMC invoked by PDGF-BB, its mechanism may be related to its inhibition effect of PDGF-BB-induced au tophagy of HA-VSMC by regulating AMPK/mTOR signaling pathway. [ABSTRACT FROM AUTHOR]

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Aiming at the problem of bearing-only target steering maneuver detection, a multi-platform bearing-only target maneuver detection algorithm based on heading estimation is proposed. The algorithm selects the sequence of hypothetical maneuvering points, solves the two target motion elements before and after the hypothetical maneuvering point, and determines whether the target maneuvers according to the change of the sequence of the heading difference of the adjacent segments solved. Based on the Taylor series element solution model, a joint solution model of two motion elements and an independent solution model of two motion elements were established. The false alarm rate, target maneuver detection rate, maneuver detection delay time and maneuver time estimation accuracy of the maneuver detection algorithm under these two solution models are statistically analyzed. Simulation results show that the maneuver detection algorithms under the two solution models can effectively detect maneuvering targets. [ABSTRACT FROM AUTHOR]

为了从高速OTDM（光时分复用）信号中提取出支路时钟并实现解复用,实现高速光信号与相对低速电信号之间的接口,首次展示了一种基于商用的MZM（马赫-曾德调制器）和PolM（偏振调制器）级联的OEO（光电振荡器）实现从2×40GBaud/s OTDM信号中提取支路时钟并同时解复用的实验方案。利用这种改进的OEO,成功地从2×40GBaud/s的OTDM DQPSK（差分四相相移键控）调制格式的高速光信号中提取出了40GHz电时钟,该时钟的相位噪声在10kHz频偏处达到-98.62dBc/Hz,与微波源（Agilent Technologies,E8267D）的相位噪声质量几乎相同。这种OEO还同时实现了从OT-DM信号中解复用出两个支路信号的功能,即将160Gbit/s的PRBS（伪随机二进制序列）OTDM信号成功解复用为两路高质量的80Gbit/s支路信号。

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文章介绍了3种十分常用的OFDM-PON（正交频分复用-无源光网络）结构:WDM（波分复用）-OFDM-PON、TDM（时分复用）-OFDM-PON和ECDM（码分复用）-OFDM-PON,并讨论了它们各自在传输速率、接收终端结构和频带利用率等方面的优势。

文章在差集合理论的基础上,给出了满足相关特性的最佳光正交码的约束条件,提出了一种最佳（n,w,1）光正交码的构造方法,并构造出码容量为2的最佳（n,w,1）光正交码码组,最后递归构造出码容量为60的最佳光正交码码组。结果表明,此方法构造的光正交码码组具有较大的码容量和良好的相关特性,有一定的实用性。

Copyright of Food Research & Development is the property of Food Research & Development Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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The purpose of this paper is to review the relationship between dietary inflammatory index and mental disorders, so as to provide references for nutritional interventions for patients with mental disorders. The high disability rate and intractability of mental illness bring huge economic burden and medical pressure to patients' families and society. Dietary nutrition is crucial to the rehabilitation of mental illness. As a new type of index to measure food pro-inflammatory index, dietary inflammatory index is closely related to the occurrence and development of mental illness. Therefore, this paper reviews the development, calculation and correlation with mental illness of dietary inflammatory index. [ABSTRACT FROM AUTHOR]

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Objective·To study the short-term and long-term clinical effect of preventive extraction of mandibular third molar (M3M) germ with impaction tendency. Methods·From September 2018 to April 2020, 21 cases of M3M germs with impaction tendency were included in the experimental group at the Department of Oral Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine. At the same time, 21 adult M3Ms which were completely impacted were included as the control group. M3Ms were extracted by ultrasonic osteotome and turbine drill. The patients were followed up 1 d, 3 d, 7 d, 3 months and 6 months after surgery. The surgery time, bone defect depth (BDD), probing depth (PD), plaque index (PLI), gingival index (GI), pain degree (visual analog score, VAS), degree of swelling, mouth opening restriction degree, and adverse reactions were compared between the two groups. IBM SPSS statistics 25 software was used for statistical analysis, and the quantitative data were expressed in x±s. The independent sample t-test or Mann-Whitney U test was used for the comparison between the two groups in primary and secondary outcomes. Kruskal-Wallis H test was used to analyze the intragroup changes of the primary outcomes, and Mann-Whitney U test was used for further pairwise comparison within the group. Statistical significance was accepted at a value of P<0.05. Results·The surgery time of the experimental group was (7.62±1.50) min and that of the control group was (10.76±2.21) min. There was a significant difference in the surgery time between two groups (P=0.000). The BDD of the experimental group was (0.65±0.33) mm and that of the control group was (2.49±1.37) mm at 6 months after surgery. There were significant differences in BDD, PD, PLI and GI between the two groups at 6 months after surgery (P=0.000, P=0.012, P=0.011, P=0.042). The BDD of the two groups at 6 months after surgery was significantly higher than that at baseline, and the difference was statistically significant (P= 0.009, P=0.000). There was a significant difference in VAS between the two groups at 3 d after surgery (P=0.044). At each followup period after surgery, there was a significant difference in the degree of swelling between the two groups (P=0.005, P=0.031, P= 0.019). In the control group, 1 case of inferior alveolar nerve injury occurred, and the other patients did not have adverse reactions such as bleeding, nerve injury, dry socket disease, etc. Conclusion·Preventive extraction of M3M germ with impaction tendency can shorten the surgery time, and reduce postoperative reaction, which can obtain better long-term clinical effect compared with adult impacted M3M extraction. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Mine Automation is the property of Industry & Mine Automation Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)