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减少猪场臭气生成的饲粮配制技术与养殖技术研究进展

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中国畜牧杂志 2024年第5期60卷 74-79页

作者：王四新刘辉张董燕季海峰北京市农林科学院畜牧兽医研究所北京100097

随着养殖规模和集约化程度的不断提高,养殖场产生的臭气严重危害人畜健康和周边生态环境,臭气污染问题备受关注。解决猪场臭气污染的重要途径之一是减少臭气物质产生,而改进饲粮技术和养殖技术是减少猪场臭气物质生成的关键技术措施。... 详细信息

随着养殖规模和集约化程度的不断提高,养殖场产生的臭气严重危害人畜健康和周边生态环境,臭气污染问题备受关注。解决猪场臭气污染的重要途径之一是减少臭气物质产生,而改进饲粮技术和养殖技术是减少猪场臭气物质生成的关键技术措施。本文综述了猪场臭气组成及产生途径、猪场中关键致臭物质及筛选方法、有效减少臭气生成的饲粮技术和养殖技术,旨在为加强猪场臭气方面的基础研究及减排技术的推广提供参考,进一步推进养猪业的高质量发展。

关键词：臭气减量饲粮技术养殖技术猪场

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Physical-Layer Encryption in Massive MIMO Systems with Spatial Modulation

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China Communications 2018年第10期15卷 159-171页

作者： sixin wang Wei Li Jing Lei School of Electronic Science National University of Defense Technology

Massive multiple input and multiple output(MIMO) is a key technology of the fifth generation(5 G) wireless communication systems, which brings various advantages, such as high spectral efficiency and energy efficiency. In MIMO system, spatial modulation(SM) has recently emerged as a new transmission method. In this paper, in order to improve the security in SM-MIMO, a physical layer encryption approach named chaotic antenna-index three-dimensional modulation and constellation points rotated(CATMCPR) encryption scheme is proposed, which utilizes the chaotic theory and spatial modulation techniques. The conventional physical-layer encryption in SM-MIMO suffers from spectral efficiency(SE) performance degradation and usually needs a preshared key, prior channel state information(CSI) or excess jamming power. By contrast, we show that the CATMCPR scheme can not only achieve securely communication but also improve above drawbacks. We evaluate the performances of the proposed scheme by an analysis and computer simulations.

关键词： massive MIMO chaotic system physical layer security antenna-index spatial modulation

Prediction of load-displacement performance of grouted anchors in weathered granites using FastICA-MARS as a novel model

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Geoscience Frontiers 2021年第1期12卷 415-423页

作者： Hao Shen Jinhui Li sixin wang Zewei Xie Department of Civil and Environmental Engineering Harbin Institute of Technology(Shenzhen)Shenzhen518055China Shenzhen Institute of Building Research Co. Ltd.Shenzhen518049China

With the rising needs of better prediction of the load-displacement performance of grouted anchors in an era of developing large-scale underground infrastructures,the existing methods in literature lack an accurate analytical model for the real-life projects or rigorous understanding of the parameters such as grouting *** paper proposes Fast ICA-MARS as a novel data-driven approach for the prediction of the load-displacement performance of uplift-resisting grouted *** hybrid and data-driven Fast ICA-MARS approach integrates the multivariate adaptive regression splines(MARS)technique with the Fast ICA algorithm which is for Independent Component Analysis(ICA).A database of 4315 observations for 479 different anchors from 7 different projects is *** database is then used to train,validate and compare the Fast ICA-MARS approach with the classical MARS *** developed Fast ICA-MARS model can provide more accurate predictions than ***,the developed Fast ICA-MARS model is easy to interpret since the evaluation of the parameter importance of the independent components can be conducted along with the considerations of the correlations with the original *** is noteworthy to point out that the grouting pressures play a central role in the proposed model,which is considered of paramount importance in engineering practices but has not been properly taken into account in any prior analytical or empirical predictive models for the load-displacement relationships.

关键词： Grouted anchors Load-displacement relationships Pull-out tests FastICA MARS

基于静载试验的花岗岩持力层上覆厚层软土基桩弹性压缩分析

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广东土木与建筑 2024年第8期31卷 25-30页

作者：王幼明汪四新何高峰张晓衡深圳市建研检测有限公司深圳518049 广东省绿色建筑工程质量检测评价工程技术研究中心深圳518049 深圳市建筑科学研究院股份有限公司深圳518049

为使厚层软土地区花岗岩等“硬岩”为持力层的超长灌注桩的桩身弹性压缩量计算更加合理,通过对该类场地灌注桩抗压静载试验“荷载-沉降”数据进行分析,并采用有限元仿真计算和概率统计分析方法,得到了端阻比与长径比等参数的函数关系以... 详细信息

为使厚层软土地区花岗岩等“硬岩”为持力层的超长灌注桩的桩身弹性压缩量计算更加合理,通过对该类场地灌注桩抗压静载试验“荷载-沉降”数据进行分析,并采用有限元仿真计算和概率统计分析方法,得到了端阻比与长径比等参数的函数关系以及桩侧摩阻力分布系数的样本统计值,建立了通过长径比等参数估算桩身弹性压缩系数ξe的方法以及相应的简化计算公式。最后通过某案例计算与规范推荐的方法进行对比,验证该公式计算桩身弹性压缩量的准确性及便捷性。

关键词：静载试验桩端阻比桩侧阻力分布承载力桩身弹性压缩系数

用于苯乙酮催化加氢制α-苯乙醇高稳定Cu/SiO_(2)催化剂的研究

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当代化工 2024年第4期53卷 802-808页

作者：柳凡玲王嗣鑫刘蝈蝈王康军沈阳化工大学化学工程学院辽宁沈阳110142

Cu/SiO_(2)催化剂存在热稳定性差、易失活等方面的问题。为进一步改善其热稳定性差这一缺陷,通常以添加助剂的方式对催化剂电子结构进行调节,提高其稳定性。通过引进Ca、In、Al 3种金属材料对Cu/SiO_(2)修饰改性。结果表明:Ca-Cu/SiO_(2... 详细信息

Cu/SiO_(2)催化剂存在热稳定性差、易失活等方面的问题。为进一步改善其热稳定性差这一缺陷,通常以添加助剂的方式对催化剂电子结构进行调节,提高其稳定性。通过引进Ca、In、Al 3种金属材料对Cu/SiO_(2)修饰改性。结果表明:Ca-Cu/SiO_(2)催化剂在反应10 h后活性仍然维持稳定,苯乙酮转化率维持在100%,未出现失活现象。In-Cu/SiO_(2)和Al-Cu/SiO_(2)催化剂在反应10 h后苯乙酮转化率只维持在20%和25%左右,改性未达到预期目标。通过N_(2)吸附、XRD、H_(2)-TPR、NH_(3)-TPD和TG等技术表征,进一步证明Ca的添加能够提高催化剂稳定性及活性组分与载体间相互作用力,获得Ca-Cu/SiO_(2)催化剂在苯乙酮加氢制备α-苯乙醇反应过程中的高转化率、高选择性以及高稳定性。

关键词：苯乙酮苯乙醇氢化 Ca-Cu/SiO_(2)催化剂助剂改性

Protection of Freedom of Expression by Chinese Laws

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The Journal of Human Rights 2009年第6期8卷 25-28页

作者： wang sixin Research Center for Media Laws Regulations and Policies Communication University of China

Article 35 of the Constitution provides that citizens of the People＇s Republic of China enjoy freedom of speech, of the press, of assembly, of association, of procession and of demonstration. This accords with provisions of Articles of 19, 21 and 22 of International Covenant on Civil and Political Rights. In his report at the 17th National Congress of the Communist Party of China （CPC）, General Secretary Hu Jintao urged to guarantee the people＇s right to freedom of expression. The right to free expression, apart from freedom of speech and of the press, includes the right to use slogans and posters to express political views.

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Internet and Human Rights

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Beijing Review 2013年第42期56卷 46-47页

作者： wang sixin School of Politics and Law at the Communication University of China

When discussing the relationship be- tween the Internet and human rights, we need to have a broad exploration of human rights issues across the current media environment, featuring rapidly growing tech- nologies and i... 详细信息

关键词：互联网人权高科技技术

Cultural Rights and Cultural Diversity

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The Journal of Human Rights 2011年第4期10卷 15-18页

作者： wang sixin The author is Deputydean of the School of Politics and Law of the Communication University of China

Culture is a very big concept, big enough almost to comprise all the activities of human beings and thetangible and intangible results caused by human activities. Therefore, it is very difficult to define culture in a... 详细信息

关键词： Cultural Rights and Cultural Diversity mode

Impact of oxygen incorporation on interface optimization and defect suppression for efficiency enhancement in Cu_(2)ZnSn(S,Se)_(4)solar cells

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Journal of Energy Chemistry 2024年第8期95卷 77-85,I0003页

作者： Shicheng Deng Songfan wang Yuanyuan wang Qian Xiao Yuena Meng Dongxing Kou Wenhui Zhou Zhengji Zhou Zhi Zheng sixin Wu Key Laboratory for Special Functional Materials of MOE National&Local Joint Engineering Research Centre for High-efficiency Display and Lighting TechnologySchool of MaterialsHenan UniversityKaifeng 475004HenanChina Key Laboratory of Micro-Nano Materials for Energy Storage and Conversion of Henan Province Institute of Surface Micro and Nano MaterialsCollege of Chemical and Materials EngineeringXuchang UniversityXuchang 461000HenanChina

Kesterite Cu_(2)ZnSn(S,Se)_(4)(CZTSSe)solar cells suffer from severe carrier recombination,limiting the photovoltaic *** energy band alignment at the p-n junction and defective front interface are two main ***,oxygen incorporation in CZTSSe via absorber air-annealing was developed as a strategy to optimize its surface photoelectric property and reduce the *** optimized oxygen incorporation conditions,the carrier separation and collection behavior at the front interface of the device is *** particular,it is found that oxygen incorporated absorber exhibits increased band bending,larger depletion region width,and suppressed absorber *** indicate the dynamic factors for carrier separation become ***,the increased potential difference between grain boundaries and intra grains combined with the decreased concentration of interface deep level defect in the absorber provide a better path for carrier *** a consequence,the champion efficiency of CZTSSe solar cells has been improved from 9.74%to 12.04%with significantly improved open-circuit voltage after optimized air-annealing *** work provides a new insight for interface engineering to improve the photoelectric conversion efficiency of CZTSSe devices.

关键词： Kesterite Thin film solar cell Interface optimization Surface oxidation Defect suppression