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Electric-Circuit Realization of Fast Quantum Search

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Research 2021年第1期2021卷 868-875页

作者： Naiqiao Pan tian Chen Houjun Sun xiangdong Zhang Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurements of Ministry of Education Beijing Key Laboratory of Nanophotonics&Ultrafine Optoelectronic SystemsSchool of PhysicsBeijing Institute of TechnologyBeijing 100081China Beijing Key Laboratory of Millimeter Wave and Terahertz Techniques School of Information and ElectronicsBeijing Institute of TechnologyBeijing 100081China

Quantum search algorithm,which can search an unsorted database quadratically faster than any known classical algorithms,has become one of the most impressive showcases of quantum *** has been implemented using various quantum ***,we demonstrate both theoretically and experimentally that such a fast search algorithm can also be realized using classical electric *** classical circuit networks to perform such a fast search have been *** has been shown that the evolution of electric signals in the circuit networks is analogies of quantum particles randomly walking on graphs described by quantum *** searching efficiencies in our designed classical circuits are the same to the quantum *** classical circuit networks possess good scalability and stability,the present scheme is expected to avoid some problems faced by the quantum ***,our findings are advantageous for information processing in the era of big data.

关键词： theory. quantum faster

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美国新农业法案面对的问题和走向分析

世界农业 2024年第9期 42-51页

作者：王琪吕向东田志宏中国农业大学经济管理学院北京100083 农业农村部农业贸易促进中心北京100125

农业法案是美国农业政策的基础,也是美国农业产业发展的重要保障。美国农业法案始于1933年,到2024年已出台18部农业法案,从2022年开始制定的第19部农业法案表现迟缓,至今未能形成新农业法草案。新农业法案为何迟迟难以推出?美国当局正... 详细信息

农业法案是美国农业政策的基础,也是美国农业产业发展的重要保障。美国农业法案始于1933年,到2024年已出台18部农业法案,从2022年开始制定的第19部农业法案表现迟缓,至今未能形成新农业法草案。新农业法案为何迟迟难以推出?美国当局正面临着哪些困境?新农业法案的未来走向又将如何?本文认为,美国新农业法案的出台面临着农业生产风险扩大、政府财政约束、政党分歧和世界贸易组织(WTO)规制四个难题。为解决这些难题,本文分析并提出新农业法案进展的三个走向,一是严格把控营养项目的申请资格和支出,二是设置过渡性的气候环境政策,三是改进农业收入安全网计划的支持水平。结合美国新农业法案进展分析,本文在加强中国农业立法方面的制度化建设、协同制订农业支持政策和提高农民参与或影响政策的可能性和能动性等方面提出了思考和建议。

关键词：美国农业法案农业政策农业补贴营养援助计划

CD4^(+)T细胞在肿瘤免疫治疗中的作用与应用研究进展

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药学进展 2024年第6期48卷 463-470页

作者：田亚红高向东姚文兵田浤中国药科大学生命科学与技术学院江苏南京211198

近年来肿瘤免疫治疗带来革命性变化,免疫检查点阻断和过继细胞疗法等治疗手段正逐渐成为肿瘤治疗的标准策略。大多数肿瘤免疫疗法的重点是利用细胞毒性CD8^(+)T细胞发挥抗肿瘤活性,但近年来研究发现CD4*T细胞在其中的作用也不可忽视。CD... 详细信息

近年来肿瘤免疫治疗带来革命性变化,免疫检查点阻断和过继细胞疗法等治疗手段正逐渐成为肿瘤治疗的标准策略。大多数肿瘤免疫疗法的重点是利用细胞毒性CD8^(+)T细胞发挥抗肿瘤活性,但近年来研究发现CD4*T细胞在其中的作用也不可忽视。CD4^(+)T细胞可以辅助CD8^(+)T细胞更好地发挥细胞毒作用,也具备直接杀伤肿瘤细胞的能力。综述CD4^(+)T细胞在抗肿瘤免疫反应中的作用研究进展及其在肿瘤免疫治疗中的应用,以期为CD4^(+)T细胞在抗肿瘤免疫治疗中进一步开发与临床研究提供参考。

关键词： CD4^(+)T细胞肿瘤免疫细胞毒性T淋巴细胞新生抗原

A Duplex Real-Time PCR Assay for the Simultaneous Detection of Porcine Circovirus 2 and Circovirus 3

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Virologica Sinica 2018年第2期33卷 181-186页

作者： xiangdong Li Mingming Qiao Ming Sun Kegong tian National Research Center for Veterinary Medicine High-Tech District Luoyang 471003 China Beijing Anheal Laboratories Co. Ltd. Beijing 100094 China College of Animal Science and Veterinary Medicine Henan Agricultural University Zhengzhou 450002 China

Porcine circoviruses(PCV) include PCV1, PCV2, and the new-emerging PCV3. PCV2 is pathogenic to pigs, but the pathogenicity of PCV3 in pigs is debatable. Recently, there have been frequent reports of PCV2 and PCV3 co-infections in clinical samples. Thus, it would be practical to develop a duplex PCR method to detect PCV2 and PCV3 simultaneously. In this study, specific primers and probes were designed to target PCV2 cap and PCV3 rep genes. A duplex real-time PCR method was then developed to detect the two viruses. The assay was found to be highly specific, sensitive, and reproducible for PCV2/3 without cross-reactions with other swine pathogens. The sensitivity of this assay was 2.9 copies for the PCV2 plasmid and 22.5 copies for the PCV3 plasmid. The established assay was then used to detect PCV2/3 infection in 340 clinical samples collected in the first half of 2017. The results showed that the co-infection rate of PCV2/3 in the samples was 27.6%. Our study provides an important tool that can be used to perform urgently needed surveys for the two porcine circoviruses to evaluate their impact on the swine industry.

关键词： Porcine circovirus 2(PCV2) Porcine circovirus 3(PCV3) Co-infection Real-time PCR

Network traffic prediction method based on improved ABC algorithm optimized EM-ELM

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The Journal of China Universities of Posts and Telecommunications 2018年第3期25卷 33-44页

作者： tian Zhongda Li Shujiang Wang Yanhong Wang xiangdong School of Information Science and Engineering Shenyang University of Technology

In order to overcome the poor generalization ability and low accuracy of traditional network traffic prediction methods, a prediction method based on improved artificial bee colony （ABC） algorithm optimized error minimized extreme learning machine （EM-ELM） is proposed. EM-ELM has good generalization ability. But many useless neurons in EM-ELM have little influences on the final network output, and reduce the efficiency of the algorithm. Based on the EM-ELM, an improved ABC algorithm is introduced to optimize the parameters of the hidden layer nodes, decrease the number of useless neurons. Network complexity is reduced. The efficiency of the algorithm is improved. The stability and convergence property of the proposed prediction method are proved. The proposed prediction method is used in the prediction of network traffic. In the simulation, the actual collected network traffic is used as the research object. Compared with other prediction methods, the simulation results show that the proposed prediction method reduces the training time of the prediction model, decreases the number of hidden layer nodes. The proposed prediction method has higher prediction accuracy and reliable performance. At the same time, the performance indicators are improved.

关键词： error minimized extreme learning machine improved artificial bee colony algorithm network traffic prediction

降雨-波浪-水位对库岸崩滑泥沙空间分布影响

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大连理工大学学报 2024年第5期64卷 542-550页

作者：李依杭侯祥东李玉成赵香玲李玥璿田晋徐向舟大连理工大学水利工程系辽宁大连116024 山东省海河淮河小清河流域水利管理服务中心山东济南250100 中国科学院长武黄土高原农业生态试验站陕西咸阳713600 济宁市水利事业发展中心山东济宁272499

库岸崩滑对库区含沙量有显著影响,掌握崩滑泥沙与水文因素的关系有助于分析库区泥沙的淤积过程和输移规律.通过降雨-波浪-水位多因素耦合模型试验分析了崩滑泥沙在不同水文因素作用下的空间分布规律.结果表明,降雨能减弱含沙量的变化幅... 详细信息

库岸崩滑对库区含沙量有显著影响,掌握崩滑泥沙与水文因素的关系有助于分析库区泥沙的淤积过程和输移规律.通过降雨-波浪-水位多因素耦合模型试验分析了崩滑泥沙在不同水文因素作用下的空间分布规律.结果表明,降雨能减弱含沙量的变化幅度,促使悬移质泥沙颗粒细化.降雨后含沙量平均变异系数降幅为22%,极细砂粒含量降幅为53%.波浪可加大离岸方向库区含沙量,同时降低此方向含沙量变异系数.波浪作用下离岸方向的平均含沙量增幅为78%,含沙量平均变异系数降幅为67%.水位升高促使离岸方向和水深方向的含沙量降低,悬移质泥沙颗粒粗化.离岸方向和水深方向的平均含沙量在水位升高时降幅分别为14%和20%,极细砂粒含量增幅为15%.

关键词：水位波动含沙量变异系数模型试验多因素耦合库岸崩滑

金天格胶囊对经皮球囊椎体后凸成形术后患者骨密度、骨代谢及生活质量的影响

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中国骨质疏松杂志 2021年第1期27卷 110-113页

作者：韩昶晓田向东朱光宇谭冶彤马晟杜冬峰李述文陈汉东北京中医药大学研究生院北京100029 北京中医药大学第三附属医院微创关节科北京100029

目的观察骨质疏松椎体压缩性骨折患者,在经皮球囊椎体后凸成形术(percutaneous kyphoplasty,PKP)后服用金天格胶囊对骨密度、骨代谢及生活质量的改善情况。方法选取2016年5月至2019年1月在我院行PKP治疗的骨质疏松椎体压缩性骨折患者80... 详细信息

目的观察骨质疏松椎体压缩性骨折患者,在经皮球囊椎体后凸成形术(percutaneous kyphoplasty,PKP)后服用金天格胶囊对骨密度、骨代谢及生活质量的改善情况。方法选取2016年5月至2019年1月在我院行PKP治疗的骨质疏松椎体压缩性骨折患者80例,根据治疗方法不同分为治疗组(n=40)与对照组(n=40);在术后1周治疗组口服金天格胶囊治疗,对照组口服钙尔奇D3片。在治疗前、治疗后6个月记录骨密度(腰椎、股骨颈)、血清骨钙素(OC)和血清Ⅰ型胶原C末端肽(S-CTX)评估骨密度和骨代谢改善情况;在治疗前及治疗后3、6个月记录健康调查简表(SF-36)、疼痛视觉模拟评分(VAS)及Oswestry功能障碍指数评分(ODI)评估生活质量改善情况。结果对比治疗前,两组患者的骨密度、SF-36量表、VAS评分与ODI评分在6个月随访中均显著改善(P0.05)。结论PKP术后服用金天格胶囊可提升患者骨密度,调节骨代谢,进一步缓解腰背部疼痛,改善术后生活质量。

关键词：金天格胶囊骨质疏松椎体压缩性骨折经皮球囊椎体后凸成形术骨密度

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利用视频图像计算车辆速度

黑龙江交通科技 2024年第6期47卷 151-154,160页

作者：周海尹向东田召阳哈尔滨市驾友交通事故司法鉴定中心黑龙江哈尔滨150010 黑龙江大泽司法鉴定中心黑龙江哈尔滨150000

交通事故车辆行驶速度的确认,是分析事故发生原因及认定事故责任的重要依据。在交通违法案件处理过程中,车辆行驶速度超过道路规定限制值的多少,也决定了驾驶人所受处罚程度的轻重。利用固定式视频图像计算车辆行驶速度时,通常需要在目... 详细信息

交通事故车辆行驶速度的确认,是分析事故发生原因及认定事故责任的重要依据。在交通违法案件处理过程中,车辆行驶速度超过道路规定限制值的多少,也决定了驾驶人所受处罚程度的轻重。利用固定式视频图像计算车辆行驶速度时,通常需要在目标车辆同侧车身表面距地等高位置上,选取两个至车辆纵向对称面等距离的特征点,二者之间的距离为被鉴定车辆的行驶位移。当视频图像模糊不清晰,难以准确选取前述的特征点时,仅能依靠车辆同侧车身易于识别的特征位置,对车辆行驶速度进行粗略的估算,计算结果的精度较低。通过建立数学模型,对一起交通事故车辆的行驶速度进行分析研究,并通过调整相关参数提高鉴定结果的精准度。

关键词：交通事故司法鉴定视频图像车速鉴定参数修正

Meta-analysis and its application in global change research

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Chinese Science Bulletin 2007年第3期52卷 289-299,M0300-M0302页

作者： LEI xiangdong PENG ChangHui tian DaLun SUN JianFeng Institute of Forest Resource Information Techniques Chinese Academy of Forestry Beijing 100091 China ECO-MCS Lab Institute of Environment Sciences University of Quebec at Montreal (UQAM) Montreal H3C 3P8 Canada Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China College of Life Science and Technology Central-South University of Forestry and Technology Changsha 410004 China

Meta-analysis is a quantitative synthetic research method that statistically integrates results from in- dividual studies to find common trends and differences. With increasing concern over global change, meta-analysis has been rapidly adopted in global change research. Here, we introduce the methodolo- gies, advantages and disadvantages of meta-analysis, and review its application in global climate change research, including the responses of ecosystems to global warming and rising CO2 and O3 concentrations, the effects of land use and management on climate change and the effects of distur- bances on biogeochemistry cycles of ecosystem. Despite limitation and potential misapplication, meta-analysis has been demonstrated to be a much better tool than traditional narrative review in synthesizing results from multiple studies. Several methodological developments for research synthe- sis have not yet been widely used in global climate change researches such as cumulative meta-analysis and sensitivity analysis. It is necessary to update the results of meta-analysis on a given topic at regular intervals by including newly published studies. Emphasis should be put on multi-factor interaction and long-term experiments. There is great potential to apply meta-analysis to global climate change research in China because research and observation networks have been established (e.g. ChinaFlux and CERN), which create the need for combining these data and results to provide support for governments’ decision making on climate change. It is expected that meta-analysis will be widely adopted in future climate change research.

关键词：全球变暖气候变化元分析生态系统 CO2浓度