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| 1 | Application of a ^(137)Cs fingerprinting technique for interpreting responses of sediment deposition of a karst depression to deforestation in the Guizhou Plateau,China显示文摘Deforestation to reclaim land often triggers severe soil erosion in the Guizhou Karst Plateau. 137Cs dating of the deposited sediments in the karst depression bottom was used to estimate soil losses by surface erosion since deforestation started in 1979 on hillslopes in the Shirenzhai catchment, Puding County, Guizhou Province. The catchment has a drainage area of 0.054 km2. The average 137Cs contents of the top and peak layers in five cores of the depression bottom (with an area of 2652 m2), collected in 2009, were 2.35 and 7.25 Bq kg-1, respectively. The medium depths in the depression (which ranged between 84 cm and 113.5 cm with a mean value of 92.1 cm) showed the presence of sediments deposited in 1979. The total volume and weight of the deposited sediments since 1979 were estimated to be 1965 m3 and 2496 t, respectively. The depression bottom can be treated as a temporary impoundment and its sediment trapping efficiency was estimated to be 0.7. The relevant average soil erosion rate on the hillslopes was 2315 t km-2 yr-1 since 1979. The mean 137Cs inventory of the five cores was 7693 Bq m-2, which was ~10 times the local reference inventory of 782 Bq m-2. The total 137Cs activity of the sediments in the bottom was 20.4×106 Bq, and the relevant 137Cs inventory loss from the hillslopes was 358 Bq m-2 (since 1954), which accounted for 45.8% of the reference inventory. As soil erosion was not severe before and after the period of deforestation and following cultivation in 1979-1990, the erosion rates on the hillslopes could potentially reach 7000 t km-2 yr-1. | ZHANG XinBao BAI XiaoYong LIU XiuMing | 2011 | Science China Earth Sciences2011，54，3： | 14 |
| 2 | The chromosome-level reference genome assembly for Panax notoginseng and insights into ginsenoside biosynthesis显示文摘Panax notoginseng,a perennial herb of the genus Panax in the family Araliaceae,has played an important role in clinical treatment in China for thousands of years because of its extensive pharmacological effects.Here,we report a high-quality reference genome of P.notoginseng,with a genome size up to 2.66 Gb and a contig N50 of 1.12 Mb,produced with third-generation PacBio sequencing technology.This is the first chromosome-level genome assembly for the genus Panax.Through genome evolution analysis,we explored phylogenetic and whole-genome duplication events and examined their impact on saponin biosynthesis.We performed a detailed transcriptional analysis of P.notoginseng and explored genelevel mechanisms that regulate the formation of characteristic tubercles.Next,we studied the biosynthesis and regulation of saponins at temporal and spatial levels.We combined multi-omics data to identify genes that encode key enzymes in the P.notoginseng terpenoid biosynthetic pathway.Finally,we identified five glycosyltransferase genes whose products catalyzed the formation of different ginsenosides in P.notoginseng.The genetic information obtained in this study provides a resource for further exploration of the growth characteristics,cultivation,breeding,and saponin biosynthesis of P.notoginseng. | Zhouqian Jiang Lichan Tu Weifei Yang Yifeng Zhang Tianyuan Hu Baowei Ma Yun Lu Xiuming Cui Jie Gao Xiaoyi Wu Yuru Tong Jiawei Zhou Yadi Song Yuan Liu Nan Liu Luqi Huang Wei Gao | 2021 | Plant Communications2021，2，1： | 11 |
| 3 | Susceptibility variations of multiple origins of loess from the Ily Basin(NW China)显示文摘The magnetic susceptibility of loess from the Ily Basin,northwestern China shows maximum values in S0 paleosols but minimum values in other paleosols,the mechanism of which has been well debated.In this work,systematic magnetic measurements were made on a representative section from Neleke county.The results show that the loess horizons(L1,L2 and L3) have multi-domain magnetite grains of aeolian origin,S0 is characterized by production of pedogenetic ultrafine-grained ferrimagnetic minerals,and the other paleosols(S1,S2,and S3) are characterized by the formation of nonferrimagnetic minerals associated with waterlogging.The correlation between the low concentration of ferrimagnets,high paramagnetic content,high magnetic coercivity remanence,fine ferrimagnetic grain size and intensified pedogenesis suggest two competing processes of pedogenetic enhancement and pedogenetic depletion in the lower paleosols.Pedogenetic depletion dominates and is responsible for the low susceptibility.Changes in magnetic grain size distribution occur during pedogenetic depletion.The susceptibility variations are of multiple origins in the loess of the Ily Basin.Pedogenetic enhancement,pedogenetic depletion,and allochthonous input of magnetic minerals should all be taken into account to explain the variations of magnetic parameters. | CHEN Qu LIU XiuMing HELLER F HIRT Ann M LU Bin GUO XueLian MAO XueGang ZHAO GuoYong FENG Hua GUO Hui | 2012 | Chinese Science Bulletin2012，57，15： | 9 |
| 4 | Correction to:Development of a Novel Reverse Transcription Loop-Mediated Isothermal Amplification Method for Rapid Detection of SARS-CoV-2显示文摘In the original version of this article,the legend to Figure 1 was incorrect.The corrected legend is given below.Fig.1 A Location of the primers in SARS-CoV-2 genome.B Sequence comparison among seven human coronaviruses(SARS-CoV-2,SARS-CoV,MERS-CoV,HCoVOC43,HCoV-HKU-1,HCoV-NL63 and HCoV-229E).C Cross-reactivity test of the novel SARS-CoV-2 RTLAMP assay to other common respiratory viruses.Tested common respiratory viruses include HCoV-HKU-1,HCoV-NL63,HCoV-OC43,HCoV-229E,influenza A,B,and C viruses,parainfluenza viruses type 1-3,enterovirus,respiratory syncytial virus A and B groups,human rhinovirus,human metapneumovirus,adenovirus and bocavirus. | Renfei Lu Xiuming Wu Zhenzhou Wan Yingxue Li Lulu Zuo Jianru Qin Xia Jin Chiyu Zhang | 2020 | Virologica Sinica2020，35，4： | 8 |
| 5 | Development of a Novel Reverse Transcription Loop-Mediated Isothermal Amplification Method for Rapid Detection of SARS-CoV-2显示文摘Dear Editor,Since early December 2019, a large outbreak of pneumonia caused by a novel coronavirus(COVID-19) had emerged in Wuhan, China(Wu et al. 2020 a, b;Zhou et al. 2020;Zhu et al. 2020;Jiang and Shi 2020). Similar to severe acute respiratory syndrome coronavirus(SARS-CoV) and Middle East respiratory syndrome coronavirus(MERS-CoV),the new coronavirus also belongs to Betacoronavirus。 | Renfei Lu Xiuming Wu Zhenzhou Wan Yingxue Li Lulu Zuo Jianru Qin Xia Jin Chiyu Zhang | 2020 | Virologica Sinica2020，35，3： | 7 |
| 6 | Spatial and temporal variation in magnetic properties of street dust in Lanzhou City,China显示文摘Urban environmental problems are of increasing concern. Lanzhou is a large industrial city in North-west China. Street dust samples representing different temporal and spatial scales were collected for magnetic properties study. Magnetic measurements indicate a high concentration of magnetic minerals in Lanzhou street dust, dominated by pseudo-single domain (PSD) magnetite. The concentration of magnetic materials is distinctly high in winter and spring, low in autumn. Similarly, higher concentra-tions associated with heavy industry, concentrated residential development, and vehicular traffic sug-gest mixed contributions of magnetic material from both anthropogenic and natural sources. χ_lf and SOFT% are effective magnetic parameters that denote seasonal differences among magnetic proper-ties in street dust, convenient and economical methods for monitoring street dust pollution. | WANG Guan XIA DunSheng LIU XiuMing CHEN FaHu YU Ye YANG LiPing CHEN JianHui ZHOU AiFeng | 2008 | Chinese Science Bulletin2008，53，12： | 7 |
| 7 | The magnetic properties of Serbian loess and its environmental significance显示文摘This paper reports a loess-paleosol sequence located in the Danube River basin,Serbia,which formed at least since the latest part of the early Pleistocene,and before the paleomagnetic B/M boundary.Various magnetic parameters of the Serbian V-L1-V-S4 loess-paleosol sequence have been measured and analyzed in the Titel Loess Plateau.These parameters show a very similar magnetic behavior compared with that of the Chinese loess.There is a general positive relationship between magnetic susceptibility() and pedogenesis.The main contributors to are the magnetic grains of SP(superparamagnetic) and SD(single domain) magnetic domains,while MD(multi domain) contributes only a small percentage.The difference in between loess and paleosol mainly is caused by pedogenesis.The very fine magnetic minerals increase gradually with increasing soil development(from loess to soil),and they lead to higher.The thermomagnetic curves show thatmagnetic minerals in the loess layers are magnetite and maghemite,both providing a major contribution to.In contrast the paleosol layers mainly are composed of magnetite,with almost no or a very small amount of maghemite,as implied by a reversible thermomagnetic behavior.This indicates that pedogenic conditions during V-S3 and V-S4 strong soil development have resulted in maghemite that is no longer stable,and has been resolved or converted to other stable phase minerals.This likely indicates that soil moisture during V-S3 and V-S4 development exceeded a critical condition of maghemite stability. | LIU XiuMing LIU Zhi Lü Bin MARKOVI S B CHEN JiaSheng GUO Hui MA MingMing ZHAO GuoYong FENG Hua | 2013 | Chinese Science Bulletin2013，58，3： | 7 |
| 8 | Leaky modes and the first arrivals in cased boreholes with poorly bonded conditions显示文摘The generation mechanism of the first arrivals in the cased boreholes for the poorly bonded conditions is investigated. Based on the analyses of the Riemann surface structure of the characteristic function, the dispersion features, excitation spectra and contributions of modes excited in the cased boreholes with different cementing types are studied. The phase velocity dispersion studies of leaky modes show that high-order modes form 'plateau' regions with one approximate velocity denoted by v separated by their cutoff frequencies, in which the phase velocity changes little with a considerable frequency range, while the group velocity keeps a relatively constant high value. Usually, the operation frequency range of a specific cementing evaluation acoustic logging tool is covered by such a 'plateau' region. Mode excitation and contribution analyses show that the first arrivals in the cased boreholes for the poorly bonded conditions are the contributions from leaky modes, where the traveling velocity of the first arrivals processed by slowness time coherence(STC) method is equal to the approximated velocity v. Analyses on generation of leaky modes in the cased boreholes supplement the understanding of the generation mechanism of the first arrivals. | XiuMei Zhang XiuMing Wang HaiLan Zhang | 2016 | Science China(Physics,Mechanics & Astronomy)2016，59，2： | 7 |
| 9 | A rotated staggered grid fi-nite-difference with the ab-sorbing boundary condition of a perfectly matched layer显示文摘A rotated staggered grid finite-difference (FD) method with a perfectly matched layer (PML) method is proposed for numerically solving elastic wave equations in inhomogeneous elastic and poroe- lastic media. Compared with a standard staggered- grid FD, the former has the advantage over the latter in that its physical variables need only to be defined at two locations. In the rotated staggered grid, stress and strain components (or particle velocity and dis- placement components) are defined at elementary cell centers, and the velocity or displacement com- ponents (or the stress and strain components) are defined at vertexes. In this way, no elastic moduli need to be interpolated or averaged. Numerical re- sults from the proposed method have been compared with the standard staggered FD method. The results are in good agreement with each other. Our numeri- cal results show that the proposed algorithm can handle much stronger impedance contrast. This is especially true when simulating fractured medium filled with fluids such as water or gas without giving special treatment. On the other hand, the imple- mented PML absorbing boundary condition works well in efficiently reducing reflected waves from the artificial interfaces. It generates almost no reflection at artificial interfaces with a boundary of PML thick- ness of half a wavelength. Our theoretical analysis and numerical tests proved that the PML absorbing algorithm in the rotated staggered grid is almost identical to those in the standard staggered grid. In this paper, we also presented all of the formulations of the PML implementation and modeling examples | CHEN Hao WANG Xiuming ZHAO Haibo | 2006 | Chinese Science Bulletin2006，51，19： | 7 |
| 10 | Prediction of median survival time in sepsis patients by the SOFA score combined with different predictors显示文摘Background:Sepsis is the leading cause of intensive care unit(ICU)admission.The purpose of this study was to explore the prognostic value of the Sequential Organ Failure Assessment(SOFA)score,the Acute Physiological and Chronic Health Evaluation Ⅱ(APACHE Ⅱ)score,and procalcitonin(PCT),albumin(ALB),and lactate(LAC)levels in patients with sepsis.Methods:Consecutive adult patients with suspected or documented sepsis at ICU admission were recruited.Their basic vital signs and related auxiliary examinations to determine their PCT and ALB levels and APACHE Ⅱ score were recorded at ICU admission,and their LAC levels and SOFA scores were recorded for one week after admission.The influence of these variables on hospital mortality was evaluated.Logistic regression was used to derive the Sepsis Hospital Mortality Score(SHMS),a prediction equation describing the relationship between predictors and hospital mortality.The median survival time was calculated by the Kaplan–Meier method.In the validation group,the kappa value was calculated to evaluate the stability of the derived formula.Results:This study included 894 sepsis patients admitted to 18 ICUs in 16 tertiary hospitals.Patients were randomly assigned to an experimental group(626 cases)and validation group(258 cases).In addition,a nonsurvival group(248 patients)of the experimental group was established according to the outcome at the time of discharge.The hospital mortality rate in the experimental group was 39.6%(248/626).Univariate and multivariate regression analyses revealed that the APACHE Ⅱ score(odds ratio[OR]=1.178),△SOFA(OR=1.186),△LAC(OR=1.157),and SOFA mean score(OR=1.086)were independently associated with hospital mortality.The SHMS was calculated as logit(p)=4.715–(0.164×APACHE Ⅱ)–(0.171×△SOFA)–(0.145×△LAC)–(0.082×SOFA mean).A receiver operating characteristic curve was constructed to further investigate the accuracy of the SHMS,with an area under the curve of 0.851(95%confidence interval[CI]0.821–0.882;p<0.001)for hospital mortality.In the low-risk group and high-risk groups,the corresponding median survival times were 15 days and 11 days,respectively.Conclusion:The APACHE Ⅱ score,△SOFA,△LAC and SOFA mean score were independently associated with hospital mortality in sepsis patients and accurately predicted the hospital mortality rate and median survival time.Data on the median survival time in sepsis patients could be provided to clinicians to assist in the rational use of limited medical resources by facilitating prudent resource allocation.Trial registration:ChiCTR-ECH-13003934,retrospectively registered on August 03,2013. | Wen Li Meiping Wang Bo Zhu Yibing Zhu Xiuming Xi | 2020 | Burns & Trauma2020，8，1： | 7 |
| 11 | Robust Sensor Bias Estimation for Ill-Conditioned Scenarios显示文摘Sensor bias estimation is an inherent problem in multi-sensor data fusion systems. Classical methods such as the Generalized Least Squares (GLS) method can have numerical problems with ill-conditioned sets which are common in practical applications. This paper describes an azimuth-GLS method that provides a solution to the ill-conditioning problem while maintaining reasonable accuracy compared with the classical GLS method. The mean square error is given for both methods as a criterion to determine when to use this azimuth-GLS method. Furthermore, the separation boundary between the azimuth-GLS favorable region and that of the GLS method is explicitly plotted. Extensive simulations show that the azimuth-GLS approach is preferable in most scenarios. | Xiongjie Du Yue Wang Xiuming Shan | 2012 | Tsinghua Science and Technology2012，17，3： | 6 |
| 12 | Simultaneous range and radial velocity estimation with a single narrowband LFM pulse显示文摘The mismatch effect induced by the radial motion of a target is analyzed for linear frequency modulated(LFM) signals.Then,a novel integrated processing scheme is proposed to resolve the delay-Doppler coupling effect in LFM pulse compression.Therefore the range and radial velocity of the target can be simultaneously estimated with a narrowband LFM pulse.Finally,numerical simulation results demonstrate the effectiveness and good performance of the proposed method. | Chunmao Yeh Jian Yang Xiuming Shan Yingning Peng | 2012 | Journal of Systems Engineering and Electronics2012，23，3： | 6 |
| 13 | Environmental Investigation and Evaluation of Land Subsidence in the Datong Coalfield Based on InSAR Technology显示文摘在 Datong 煤田的侏罗记和含碳的水平煤缝接的重采矿严重影响了地质的环境,它是主要由象土壤雪崩,山崩, mudflows,表面沉淀,表面裂缝,表面固体浪费累积和表面变丑的如此的 geohazards 表明了的本地人。更严重,煤采矿引起地下水漏。地下水的 Overpumping 在 Datong 城市里导致了城市的区域的实质的陆地沉淀。在工作区域基于以前的geo环境的调查,作者使用了象 InSAR (合成的孔雷达 interferometry )和 D-InSAR (微分合成的孔雷达 interferometry )那样的雷达遥感技术,由光遥感方法补充了,geo环境的调查查明 Datong 侏罗记和含碳二叠的煤田的geo环境的背景并且评估 geohazards 的效果,因此为 th 提供一个基础在这研究, 8 个同名的 ERS-1/2 SAR 数据框架在 1992 ~ 2003 期间被使用,但是下列处理被做:(1 ) 多时间的 SAR 大小图象被用来解释地质的结构,植被, microgeomorphology 和排水系统;(2 ) 多时间的 InSAR 协调图象被用来做表面特征的一个分类并且由于煤采矿评估连贯变化;并且(3 ) 多时间的同名的 SAR 图象被用来完成处理移开微分变丑区域(地点) 的信息的 D-InSAR。最后,微分 interferograms 的一个十年的时间系列用多时间的同名的 SAR 图象被获得。在测试, 84 个使变形的区域(地点) 被获得,分别地在 19931996, 19961997, 19971998, 19982001, 19982002 和 20012003 属于那些。84 个区域, 44 是采矿沉淀一, 23 城市的沉淀和 17 山崩沉淀。他们盖住 1824.4 km2 的一个全部的区域,等价于整个 Datong 煤田的区域。然后,精确评估在 Datong 煤田的 geo 环境上被做。测试证明 InSAR 现在是为做掩饰到 10,000 km2 到 subcentimeter 分辨率的一个煤采矿陆地沉淀区域的一全天候的、即时大小的唯一的可行技术工具。这研究是在陆地沉淀的调查和评估的 InSAR 的成功的应用,特别在煤采矿区域。 | JIA Xiuming MA Chao ZHAO Anyuan | 2008 | Acta Geologica Sinica(English Edition)2008，82，5： | 5 |
| 14 | Propagation model for 2.4 GHz wireless sensor network in four-year-old young apple orchard显示文摘Wireless sensor network(WSN)nodes exchange information via wireless signals,whose power can attenuate at different levels according to the propagation environment.The branches and leaves of young apple trees are much sparser than that of adult apple trees.Propagation rules such as propagation distance and attenuation rate are the parameters necessary to know before applying a WSN to a young apple orchard.Field tests were performed,and propagation distance and packet loss rate(PLR)were computed and compared under the two cases:a young apple orchard in fruit period and an open space to find the effect of the apple trees on radio propagation.A model of antenna height and propagation distance was created to forecast the extra path loss caused by the young trees.Validation experiments were performed in a different young apple orchard,and the validation results showed that 70% of R^(2) were higher than 0.7,while the smallest being 0.65;80% RMSE were smaller than 5.The new model was also compared with some classical models such as Cost 235,FITU,ITU-R,and Weissberger model,and the new model was proved to be the best. | Guo Xiuming Zhao Chunjiang | 2014 | International Journal of Agricultural and Biological Engineering2014，7，6： | 4 |
| 15 | Acoustic wave propagation simulation in a poroelastic medium saturated by two immiscible fluids using a staggered finite-difference with a time partition method显示文摘Based on the three-phase theory proposed by Santos, acoustic wave propagation in a poroelastic medium saturated by two immiscible fluids was simulated using a staggered high-order finite-difference algorithm with a time partition method, which is firstly applied to such a three-phase medium. The partition method was used to solve the stiffness problem of the differential equations in the three-phase theory. Considering the effects of capillary pressure, reference pressure and coupling drag of two fluids in pores, three compressional waves and one shear wave predicted by Santos have been correctly simulated. Influences of the parameters, porosity, permeability and gas saturation on the velocities and amplitude of three compressional waves were discussed in detail. Also, a perfectly matched layer (PML) absorbing boundary condition was firstly implemented in the three-phase equations with a staggered-grid high-order finite-difference. Comparisons between the proposed PML method and a commonly used damping method were made to validate the efficiency of the proposed boundary absorption scheme. It was shown that the PML works more efficiently than the damping method in this complex medium. Additionally, the three-phase theory is reduced to the Biot's theory when there is only one fluid left in the pores, which is shown in Appendix. This reduction makes clear that three-phase equation systems are identical to the typical Biot's equations if the fluid saturation for either of the two fluids in the pores approaches to zero. | ZHAO HaiBo WANG XiuMing | 2008 | Science China(Physics,Mechanics & Astronomy)2008，51，7： | 4 |
| 16 | Evaluation of the four potential Cretaceous-Paleogene (K-Pg) boundaries in the Nanxiong Basin based on evidences from volcanic activity and paleoclimatic evolution显示文摘Determining the location of the Cretaceous-Paleogene(K-Pg) boundary in terrestrial strata is highly significant for studying the evolution of terrestrial ecosystems at the end of the Cretaceous(especially the extinction of non-avian dinosaurs). At present, research on terrestrial K-Pg boundaries worldwide is concentrated in the middle and high latitudes, such as North America and Northeast China. Although many studies have also been carried out in the Nanxiong Basin, located at low latitudes(which has become the standard for dividing and comparing the continental K-Pg stratigraphy in China), many researchers have proposed four possible boundaries from different perspectives. Therefore, the exact location remains to be determined. In this study, the total mercury(Hg) content, environmental magnetism, geochemistry, and other parameters for the samples collected near the four boundaries were determined and compared with existing records. Results indicated that: 1) The total Hg content significantly increased in the upper part of the Zhenshui Formation and Pingling part of the Shanghu Formation with sharp fluctuations. As per latest dating results of Deccan Traps, the significantly high Hg value was attributed to the Deccan Traps eruption. Boundary 1 was located in the middle of the Hg anomaly interval, which was consistent with the relationship between the global K-Pg boundary and time of volcanic eruption. 2) The reconstructed paleoclimate evolution curve revealed that the red sediments in the basin recorded the late Maastrichtian warming event(66.2 Ma). Regarding the relationship between the four boundaries and this warming event, only boundary 1 was found to be closest to the real K-Pg boundary of the Nanxiong Basin. | Mengting ZHAO Mingming MA Mei HE Yudan QIU Xiuming LIU | 2021 | Science China Earth Sciences2021，64，4： | 4 |
| 17 | An element by element spectral element method for elastic wave modeling显示文摘光谱联合优点的元素方法光谱有限元素方法的有那些的方法,在在复杂媒介模仿有弹性的波浪方程提供一个有效工具。基于从 elastodynamic 方程弱,为 Legendre 的数学明确的表达光谱元素方法被介绍。一个元素上的波浪地是用高顺序的 Lagrange 插值的 discretized,并且在元素上的集成被完成在 Gauss-Lobotto-Legendre 集成规则之上基于。这导致导致一个极大地简化的算法的一个斜集体矩阵。另外,由元素例子的元素被恨到在我们的方法到减少记忆尺寸并且改进计算效率。最后,一些数字例子被恨示威光谱精确性和效率。因为有限元素的联合,策划,包括免费表面边界和强壮的异质并且一光谱算法。 | LIN Weijun WANG Xiuming ZHANG Hailan | 2006 | Progress in Natural Science:Materials International2006，16，1： | 3 |
| 18 | Integral sliding mode control of time-delay systems with mismatching uncertainties显示文摘A linear matrix inequality(LMI)-based sliding surface design method for integral sliding mode control of uncertain timedelay systems with mismatching uncertainties is proposed.The uncertain time-delay system under consideration may have mismatching norm bounded uncertainties in the state matrix as well as the input matrix.A sufficient condition for the existence of a sliding surface is given to guarantee asymptotic stability of the full order sliding mode dynamics.An LMI characterization of the sliding surface is given,together with an integral sliding mode control law guaranteeing the existence of a sliding mode from the initial time.Finally,a simulation is given to show the effectiveness of the proposed method. | Fu Zhao Yu Liu Xiuming Yao Baoku Su | 2010 | Journal of Systems Engineering and Electronics2010，21，2： | 3 |
| 19 | Weak key analysis for chaotic cipher based on randomness properties显示文摘Weak key analysis is a key issue in the design of chaotic ciphers.While most of the existing research focusing on the degradation of the chaotic sequences which causes weak keys,we point out that the parameters for which the chaotic sequences do not degrade are still possible to be weak keys.In this paper,we propose a new approach based on the rigorous statistical test to improve the weak key analysis.The weak keys of a specific chaotic cipher are investigated by using our method and a large number of new weak keys are detected.These results verify that our method is more effective.On the other hand,although statistical tests are now widely adopted to test the chaos-based bit sequences,there are few reports of analysis results on the weak keys or weak sequences of chaotic cipher.Thus our work may be helpful for current research on statistical tests of chaotic cipher. | YIN RuMing WANG Jian YUAN Jian SHAN XiuMing WANG XiQin | 2012 | Science China(Information Sciences)2012，55，5： | 3 |
| 20 | Effects of organic mineral fertiliser on heavy metal migration and potential carbon sink in soils in a karst region显示文摘Heavy metal pollution in karst mountainous area of Guizhou has spread due to the long-term exploitation of mineral resources and the improper disposal of environmentally hazardous waste. Heavy metals are characterised by non-degradation, strong toxicity, and constant accumulation, posing a grave threat to karst mountain fragile soil ecosystem. To reduce the harm caused by heavy metal pollution and damage to agricultural products, research was undertaken on the basis of previous work by simulating pot experiments on pak choi cabbage(Brassica rapa chinensis)planted in Cd-contaminated soil: different amounts of organic mineral fertilisers(OMF) compared with chemical fertiliser(CF) were used and by detecting the amount of heavy metal in the mature vegetable, a better fertilisation strategy was developed. The results showed that the Cd content in vegetables grown with CF was 23.70 mg/kg,while that of vegetables grown with OMF and bacterial inoculant was the lowest at 15.13 mg/kg. This suggests that the use of OMF and microbes in karst areas not only promotes plant growth but also hinders plant absorption of heavy metal ions in the soil. In addition, through the collection of pot leachate, the detection of water chemistrycharacteristics, and the calculation of the calcite saturation index, it was found that the OMF method also induces certain carbon sink effects. The results provide a new way in which rationalise the use of OMFs in karst areas to alleviate soil heavy metal pollution and increase soil carbon sequestration. | Ping Chen Yulong Ruan Shijie Wang Xiuming Liu Bin Lian | 2017 | Acta Geochimica2017，36，3： | 2 |
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