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Solubilization of potassium containing minerals by high temperature resistant Streptomyces *** from earthworm's gut

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Acta Geochimica 2016年第3期35卷 262-270页

作者： Dian Feng Liu bin Lian bin wang Jiangsu Key Laboratory for Microbes and Functional Genomics Jiangsu Engineering and Technology Research Center for Microbiology College of Life Sciences Nanjing Normal University No. 1 Wenyuan Road Department of Bioengineering Puyang Vocational & Technical Institute State Key Laboratory of Environmental Geochemistry Institute of Geochemistry Chinese Academy of Sciences Department of Bio-Engineering Henan Institute of Science and Technology

A potassium solubilizing bacterial strain des- ignated EGT, which is tolerant of high temperature, was isolated from an earthworm＇s gut to obtain a bacterium that can weather potassium-bearing rock effectively through solid-state fermentation. Molecular phylogeny and 16S rRNA gene sequence analysis demonstrated the bacterial strain was a member of the Streptomyces genus. To assess its potential to release potassium from silicate minerals, this strain was used to degrade potassium-bearing rock powder by solid-state fermentation. After fermentation, the amount of water-soluble A1, Fe and K of the substrate with active inoculum was higher than those of the control, which had autoclaved inoculum, and those of the fresh substrate. The result indicated that the strain had the ability to weather potassium-bearing rock and could be used as an inoculum in the production of potassium bio-fertilizer, due to its potassium release activity from rock and tolerance to high temperature.

关键词： Weathering Potassium solubilizing bacteria Streptomyces

Legitimate monitor by proactive guarding for counter covert communications

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Science China(Information Sciences) 2024年第8期67卷 221-237页

作者： Manlin wang bin XIA Jiangzhou wang School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University School of Engineering University of Kent

Covert communication has been widely investigated to avoid the transmission behavior being overheard by the warder. However, covert communication may be illegitimately utilized by unauthorized parties to evade the supervision of authorized agencies, which leads to great challenges to information security. To meet the need for authorized parties to monitor and prevent illegitimate transmission between unauthorized nodes, a novel paradigm, called legitimate monitor, is proposed for counter covert communications. In the preceding covert communication system, the covert transmission rate is the focus. Differently,the core concern of the legitimate monitor system is the outage probability of the transmission between unauthorized nodes, which should be maximized to interrupt the potential but undetectable *** achieve these goals effectively, a proactive guarding approach is proposed, where the authorized warder detects the transmission behavior and emits jamming signals to interfere with the potential transmission,simultaneously. In particular, the jamming power at the warder is optimized under cases where the instantaneous/statistical channel state information is available. Besides, the corresponding outage probability is derived to evaluate the system performance, which can also be simplified to scenarios with a passive *** results demonstrate that proactive guarding outperforms the passive one, especially when the warder is not proximal to the unauthorized transmitter. In addition, the proposed jamming power allocation scheme also outperforms other benchmark schemes.

关键词： legitimate monitor counter covert communication full-duplex technology outage probability power allocation optimization

A fast and precise three-dimensional measurement system based on multiple parallel line lasers

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Chinese Physics B 2021年第2期30卷 276-284页

作者： Yao wang bin Lin State Key Laboratory of Modern Optical Instrumentation CNERC for Optical InstrumentsZhejiang UniversityHangzhou 310027China

This paper conducts a trade-off between efficiency and accuracy of three-dimensional(3 D)shape measurement based on the triangulation principle,and introduces a flying and precise 3 D shape measurement method based on multiple parallel line ***,we establish the measurement model of the multiple parallel line lasers system,and introduce the concept that multiple base planes can help to deduce the unified formula of the measurement system and are used in simplifying the process of the ***,the constraint of the line spatial frequency,which maximizes the measurement efficiency while ensuring accuracy,is determined according to the height distribution of the ***,the simulation analyzing the variation of the systemic resolution quantitatively under the circumstance of a set of specific parameters is performed,which provides a fundamental thesis for option of the four system ***,for the application of the precision measurement in the industrial field,additional profiles are acquired to improve the lateral resolution by applying a motor to scan the 3 D ***,compared with the line laser,the experimental study shows that the present method of obtaining 41220 points per frame improves the measurement ***,the accuracy and the process of the calibration are advanced in comparison with the existing multiple-line laser and the structured light makes an accuracy better than 0.22 mm at a distance of 956.02 mm.

关键词： three-dimensional shape measurement multiple parallel line lasers fast and precise measurement parameter calibration

Evaluation of fault stability and seismic potential for Hutubi underground gas storage due to seasonal injection and extraction

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Underground Space 2023年第6期13卷 74-85页

作者： Cexuan Liu Fengshou Zhang Quan wang bin wang Qi Zhang bin Xu Department of Geotechnical Engineering College of Civil EngineeringTongji UniversityShanghai 200092China Key Laboratory of Geotechnical&Underground Engineering of Ministry of Education Tongji UniversityShanghai 200092China China National Petroleum Company Xinjiang Oil FieldKaramayXinjiang 834000China School of Civil Engineering Southeast UniversityNanjing 211189China Origin Geomechanics Inc. CalgaryAlbertaT3H 0X6Canada Department of Civil Engineering University of CalgaryCalgaryAlbertaT2N 1N4Canada

The Hutubi gas field was put into production in 1998 and then converted into an underground gas storage(UGS)facility in 2013,and since then a cluster of earthquakes associated with seasonal injection and extraction activities have been recorded *** evaluate the fault stability and seismic potential,we established a pseudo-3D geomechanical model to simulate the process of seasonal injection and *** pore pressures from 1998 to 2019 were obtained through multiphase reservoir simulation and validated by history matching the field injection and production *** then imported pore pressures into the geomechanical model to simulate the poroelastic perturbation on faults for over 20 *** fidelity of this model was validated by comparing the simulated surface deformation with global positioning system(GPS)measured *** used Coulomb failure stress(CFS)as the indicator for the likelihood of fault *** simulation results show that the location of the induced earthquake cluster was within the positive Coulomb stress perturbation(DCFS)area,in which fault slippage was *** addition,DCFS at the earthquake location kept increasing after the injection *** findings could explain the induced earthquakes with the Coulomb failure stress ***,we conducted a parameter sensitivity study on the dominant factors such as the maximum operating pressure(MOP),frictional coefficient,and dip angle of the pre-existing *** results indicate that the magnitude of DCFS caused by seasonal injection and extraction decreases with distance;MOPs are constrained to 32.9,36.2,and 39.5 MPa according to different DCFS thresholds;the critical dip angle ranges are 0-20°and 80°-100°;and strengthening the fault friction can either increase or decrease the seismic *** study can help determine the MOP for Hutubi underground gas storage(HTB UGS)and provide a framework for simulating the potential causes of induced seismicity for othe

关键词： Underground gas storage Fault stability Seismic potential GPS Induced earthquake Coulomb stress perturbation

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基于多目标平衡优化器的共享储能容量优化

软件工程 2025年第1期28卷 8-13页

作者：代斌王红蕾贵州大学电气工程学院贵州贵阳550025

随着绿色能源的大量投入使用,对储能装置的需求也相应增加,要求按比例配套投入,以有效应对电网供需双侧的不确定性,这带来了投资成本过高和回收周期过长的问题。为了应对绿色能源广泛应用带来的储能挑战,提出了一种多微电网储能装置共... 详细信息

随着绿色能源的大量投入使用,对储能装置的需求也相应增加,要求按比例配套投入,以有效应对电网供需双侧的不确定性,这带来了投资成本过高和回收周期过长的问题。为了应对绿色能源广泛应用带来的储能挑战,提出了一种多微电网储能装置共享模型,旨在显著减少整体储能容量的需求。为实现这一目标,设计了一种双层优化方法,并提出了一种多目标平衡优化器用以求解上层模型,避免结果陷入局部最优。通过数据实验验证,与传统的分布式储能方式相比,多微电网储能装置共享模型使系统所需的储能容量降低了43.30%。同时,算法对比结果表明,所提多目标优化算法具有足够的竞争力。

关键词：双侧不确定性共享储能模型多目标优化算法平衡优化器储能容量优化可再生能源消纳率

Bi-stable states of initially stressed elastic cylindrical shell structures with two piezoelectric surface layers

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Acta Mechanica Sinica 2015年第5期31卷 653-659页

作者： bin wang Guo-Hua Nie Institute of Applied Mechanics School of Aerospace Engineering and Applied MechanicsTongji University

A theoretical model is proposed in this paper to predict the bi-stable states of initially stressed cylindrical shell structures attached by surface anisotropic piezoelectric *** condition for existence of bi-stability of the shell structural system is presented and analytical expressions for corresponding rolled-up radii of the stable shell are given based on the principle of minimum strain *** resulting solution indicates that the shell system may have two stable configurations besides its initial state under a combined action of the actuating electric field and initial stresses characterized by the bending *** the piezoelectric layer materials act as only sensor materials without the actuating electric field,initial stresses may produce the bi-stable states,but one corresponding to its initial *** the shell without initial stresses,the magnitude in the actuating electric field determines the number of the stable states,one or two stable configurations besides the initial *** theoretical prediction for the bi-stable states is verified by finite element method（FEM） simulation by using the ABAQUS code.

关键词： Bi-stable Initial stress Cylindrical shell Piezoelectric layer Elastic potential energy Rolled-up radius Finite element

导航技术与传统方法膝关节置换后力线测量的Meta分析

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实用骨科杂志 2010年第12期16卷 897-902页

作者：赵喜滨李斌王浩缈晓刚孙俊刚袁宏新疆维吾尔自治区人民医院骨一科新疆乌鲁木齐830001

目的分析计算机导航技术与传统方法进行膝关节置换术后力线测量的评价。方法我们检索了Cochrane liabrary(CCTR)以及Cochrane协作网肌骨组专业试验数据库,MEDLINE(1966-2009年),EMBASE(1980-2009年),收集计算机导航技术与传统方法进行... 详细信息

目的分析计算机导航技术与传统方法进行膝关节置换术后力线测量的评价。方法我们检索了Cochrane liabrary(CCTR)以及Cochrane协作网肌骨组专业试验数据库,MEDLINE(1966-2009年),EMBASE(1980-2009年),收集计算机导航技术与传统方法进行膝关节置换术后力线测量的临床随机对照试验,并评价纳入研究的方法学质量。统计软件采用Cochrane协作网提供的RevMan 4.2.8。结果纳入计算机导航技术与传统方法进行膝关节置换术后力线测量的临床随机对照试验9篇共1 083例病人。Meta分析表明,计算机导航技术比较传统方法进行膝关节置换手术:其下肢机械轴的测量较精确[WMD=-0.56,95%CI(-0.74,-0.38),P<0.00001],而股骨冠状轴和矢状轴及旋转角度的测量无明显差异[WMD=-0.29,95%CI(-0.58,0.00),P=0.05]、[WMD=-1.64,95%CI(-3.49,0.21),P=0.08]及[WMD=-0.11,95%CI(-0.87,0.66),P=0.79]。胫骨冠状轴的测量无明显差异[WMD=-0.31,95%CI(-0.69,0.06),P=0.10],而矢状轴的测量有明显差异[WMD=-0.69,95%CI(-1.10,-0.28),P=0.001]。胫股冠状角的测量两者无明显差异[WMD=0.03,95%CI(-0.78,0.84),P=0.95]。而对髌骨倾斜角及髌骨旋转角度的评价,两者亦无明显差异[WMD=-1.45,95%CI(-3.12,0.22),P=0.09]及[WMD=-0.34,95%CI(-0.71,0.02),P=0.06]。结论与传统方法相比较,计算机导航技术进行膝关节置换手术:在下肢机械轴的测量及胫骨矢状轴的测量上两者有显著差异,而在股骨冠状轴和矢状轴及旋转角度的测量、胫骨冠状轴及胫股冠状角的测量以及髌骨倾斜角及髌骨旋转角度的测量上,两者无明显差异。

关键词：计算机导航技术膝关节置换传统方法随机对照试验 Meta分析

Electron microprobe analysis of Hf and Ti in ultrahigh temperature zircon:Optimized approaches and perspectives

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Science China Earth Sciences 2023年第5期66卷 985-996页

作者： Xiaoli LI bin wang Chunjing WEI Key Laboratory of Orogenic Belts and Crustal Evolution MOE School of Earth and Space SciencesPeking UniversityBeijing100871China

Zircon as a multi-objective typomorphic mineral commonly contains diverse trace elements with specific petrogenetic *** Hf abundance in zircon is sensitively indicative of melt fractionation during zircon growth on one hand,and on another,the Ti content is a robust temperature sensor of zircon crystallization and has been effectively u tilized in thermometric estimation.A Hf-Ti negative correlation was previously reported in igneous zircons,and thus a potential Hf thermometry was then *** this work,we performed reliable electron microprobe(EMP)measurements of Hf and Ti in ultrahigh temperature(UHT)zircons from the North China Craton,in optimizing point,line and grid *** EMP contents of Hf and Ti both show a wide range of fluctuation owing to the smaller probe spot,and some of them are higher than the LAICPMS *** Hf-Ti correlation in UHT zircons displays dual and thus complicated patterns in contrast with the previous consideration,which implicates some other factors controlling the geochemical behaviors of Hf and Ti in ***,the estimated Ti temperatures based on the EMP analyses are obviously higher than the LA-ICPMS outcomes,but are well consistent with the actual peak condition of the parent *** explains the common underestimation of Ti temperatures in hightemperature metamorphic rocks,by using LA-ICPMS analyses.

关键词： Ultrahigh-temperature Zircon Hf content Ti content Electron microprobe

Four-channel catalytic micro-reactor based on alumina hollow fiber membrane for efficient catalytic oxidation of CO

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Chinese Journal of Chemical Engineering 2024年第7期71卷 140-147页

作者： Baichuan Xu bin wang Tao Li Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy and EnvironmentSoutheast UniversityNanjing 211100China

The traditional automotive catalytic converter using commercial ceramic honeycomb carriers has many problems such as high back pressure,low engine efficiency,and high usage of precious *** study proposes a four-channel catalytic micro-reactor based on alumina hollow fiber membrane,which uses phase inversion method for structural molding and *** to the advantages of its carrier,it can achieve lower ignition temperature under low noble metal *** Pd/CeO_(2) at a loading rate of 2.3%(mass),the result showed that the reaction ignition temperature is even less than 160℃,which is more than 90℃ lower than the data of commercial ceramic substrates under similar catalyst loading and airspeed *** technology in turn significantly reduces the energy consumption of the *** stability tests were conducted under constant conditions for 1000 h,which proved that this catalytic converter has high catalytic efficiency and stability,providing prospects for the design of innovative catalytic converters in the future.

关键词： Catalytic converter Precious metal catalyst Phase inversion method Hollow fiber membrane CO oxidation