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汕头大学学报（自然科学版）

汕头大学学报（自然科学版）

Journal of Shantou University(Natural Science Edition)
汕头大学学报自然科学版系广东省高教厅主管、汕头大学主办的综合性学术性刊物(季刊)。其办刊宗旨主要是及时地反映本校师生在自然科学方面的研究、教学成果，促进学术交流，推动科研和教学的发展。本刊也适量发表校外较高质量稿件。读者对象为高校师生、科学工作者及工程师。本刊被多种中文科技期刊数据库原文收录。
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    国际刊号/ISSN：1001-4217
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    邮发代号：46-17
  • 主管单位：广东省教育厅
    主办单位：汕头大学
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汕头大学学报（自然科学版） >2021年第4期

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  • 摘要：The inhibitory activities of polysaccharides from Anoectochilus roxburghii (PSA) on α-glucosidase in vitro and the effects of PSA on blood glucose in diabetic mice were studied. The results indicated that PSA can inhibit the activity of α-glucosidase in vitro and the half inhibitory concentration (IC50) was 78.66 μg/mL. In addition,PSA inhibited the postprandial blood glucose obviously and the inhibition ratio was(53.65±13.65)%;The administration with PSA (300 mg/kg bw) for 14 days caused a significant decrease (P < 0.05) in blood glucose compared with the DM group. The results demonstrated that PSA possessed obvious hypoglycemic effect and its mechanism may relate to its effects on the activity of carbohydrate metabolic enzymes and inhibition of gluconeogenesis.%研究了金线莲多糖体外抑制α-葡萄糖苷酶活性及其对四氧嘧啶诱导糖尿病小鼠血糖的影响.结果表明：金线莲多糖体外能抑制α-葡萄糖苷酶的活性，半抑制浓度值（IC50）为78.66μg/mL；对小鼠餐后血糖表现出较好的控制作用，血糖抑制率为（53.65±13.65）%；连续给予糖尿病小鼠金线莲多糖（300 mg/kg bw）14 d后，小鼠血糖值较模型组显著降低（P＜0.05）.实验结果表明金线莲多糖具有显著的降血糖功效，其作用机制与影响糖代谢酶的活性，抑制糖异生有关.
  • 摘要：To study ultrasonic extraction techniques of total flavonoids in Fructus ligustri. Methods:Taking Rutin as a reference and extraction ratio of total flavonoids as a index, to study how ethanol concentration, ultrasonic time, solid-liquid ratio and extraction times affect extraction ratio of total flavonoids in Fructus ligustri, by orthogonal design. Results:The results showed that the order of factors to affect total fiavonoid extraction was extraction times > ultrasonic time > solid-liquid ratio > ethanol concentration. The optimum ultrasonic extractions were:A3B1C3D2. ethanol concentration was 40%,ultrasonic time was 60 min,solid-liquid ratio was 1:25 and extraction times was 3. Conclusion:The developed techniques are easy to operate, improve extraction rates and need no heating.%目的：研究女贞子中总黄酮的超声提取工艺.方法：以芦丁作为对照品，总黄酮提取率为指标，采用正交试验优化乙醇浓度、提取次数、超声时间、料液比对总黄酮提取率的影响.结果：所考察的因素对女贞子总黄酮的提取率影响顺序为：提取次数＞超声时间＞料液比＞乙醇浓度，优化的提取条件：乙醇体积分数为40%、料液质量体积比1：25（g：mL），超声提取3次，每次超声处理1 h.结论：该超声提取工艺易于操作，不需加热，提取效率高，提取率为60.6 mg·g-1，即每1 g女贞子可提取60.6 mg总黄酮.
  • 摘要：本文提出了基本素紧框架的概念,证明任意阶调和框架都可由基本素紧框架的并、直和与张量积的投影得到.反之,基本素紧框架的混合运算未必为调和框架,但却生成更一般的等范紧框架,这为构造等范紧框架提供了一种新的方法.最后,本文研究了几种新构造的等范紧框架,得出一些较原框架更好的性质.
  • 摘要：本文提出了约束型矩阵模型的最小二乘估计预测量,矩阵型MSE准则,矩阵型RT(·)准则,矩阵型MDE-准则.进一步,给出了约束型矩阵模型最小二乘估计预测关于MSE准则、Rr(·)准则优于它的最佳线性无约束矩阵型最小二乘估计预测的充要条件.探究RT(·)准则与MDE-准则的相互转化关系,给出了约束型矩阵模型最小二乘估计预测优于无约束矩阵型最小二乘估计预测的充要条件.
  • 摘要：论文提出一种基于连续混沌系统的多轨道混合的图像加密算法,其中使用的连续混沌系统是一个四维常微分方程组.利用该四维常微分方程组系统的混沌特性,给定两个初始状态值,用四阶龙格库塔方法数值求解生成两条轨道,借助一个离散混沌动力系统帐篷映射生成随机序列来选择轨道点,生成一个混合轨道,并对轨道进行预处理,生成具有更好随机性的整数序列,用于灰度图像的置乱和扩散加密.论文对加密算法的安全性和各种性能进行了实验模拟和分析,包括了直方图、相关系数、信息熵、密钥敏感分析、密钥空间分析和差分分析等.实验结果证明算法是安全有效的,各种性能指标均很好,达到理想的结果.
  • 摘要：豆腐柴含有丰富的果胶,具有多样的药理活性.在单因素试验基础上,以果胶提取率为指标,采用Box-Behnken优化其微波辅助提取工艺,并通过测定果胶对羟基自由基和超氧阴离子的清除率来研究豆腐柴果胶体外抗氧化活性.结果显示,豆腐柴果胶的最佳提取工艺为:微波功率635W、提取时间29 s、液料比20∶1(mL/g),该条件下果胶提取率平均值为20.31％.豆腐柴果胶对羟基自由基和超氧阴离子自由基有较强的清除作用,显示其具有良好的抗氧化活性.
  • 摘要：定义了第一类切比雪夫乘积型和式方程,用代数变换的方法求解第一类切比雪夫乘积型基本方程、二项乃至多项乘积型和式方程的全体复根.
  • 摘要：根据农作物生长因素与药物控制机理之间的关系,建立农作物生长质量的常微分方程模型,并对其定性分析和解释,为农业生产提供理论依据.
  • 摘要：经典统计学处理公共卫生数据空间属性数据的能力不足,空间统计学具有优势,由此得到广泛应用.目前空间统计学在公共卫生领域主要应用有:疾病制图、分布格局探测、空间相互关系分析、病因分析以及时空预警等方面.
  • 摘要：本文研究了BAM神经网络的稳定性问题,通过构造新的Lyapunov泛函,给出了此类系统平衡点渐近稳定的充分条件,并举例说明了结果的有效性和保守性.该充分条件对丰富和完善了神经网络的稳定性理论体系,具有积极的意义.
  • 摘要：本文运用初等数论简单同余法、分解因子法及反证法等,得到丢番图方程2py2=2x3+ 3x2+x,(p为素数)无正整数解的情况.(1)当p≡ 1(mod 8),p≡5(mod 8),p≡7(mod 8)时,则方程无正整数解;(2)当p ≡3(mod 8)时,Un+Vn√p=(x0+yo√p)n.其中x0,y0是 Pell方程x2-py2=1的基本解,当n≡0(mod 2)时,则方程无整数解;当n≡1(mod 2)时,若2|x0,则方程无整数解.特别是p≡3(mod 8)且p<100时,2|x0,则方程无整数解.
  • 摘要：考虑一种更广泛的新型各向异性奇异积分算子,并给出这类算子的Lp(Rn×Rm)(1＜p＜∞)有界性.
  • 摘要：跨距较长的轴在自身载荷作用下产生较大的挠度,进而导致轴高速旋转时离心力沿中线分布不均匀,从而加大了轴的挠度.在重力和离心力耦合作用下,轴端翘起导致轴端与密封件的磨损严重.本文提出了一种利用有限元分析模拟重力和离心力耦合作用下高速轴径向变形的方法,并将其应用于高速轴的设计中.结果表明,在2000 r/min的额定转速下,轴端的径向变形量达到64 μm.通过优化轴承的位置,使轴端的径向变形量下降为1.8 μm,有效的降低了密封件的磨损.最后,利用模态分析,发现改进设计后轴的额定转速有效的避开了其各阶临界转速.
  • 摘要：移动最小二乘法作为一种拟合插值方法,当其基函数采用非正交基时,移动最小二乘法中采样点支持域尺寸、节点间距大小将影响到力矩矩阵的可逆性.力矩矩阵可逆是移动最小二乘法拟合成功的必要条件.因此如何合理地选取节点间距及采样点支持域尺寸以确保力矩矩阵可逆,成为移动最小二乘法应用过程中的一个重要环节.其值的选取也是移动最小二乘法主要误差来源之一.理论上,至今仍无法推导出采样点支持域尺寸及节点间距最优取值.实践中,可通过拟合实验寻找支持域尺寸、节点间距的变化规律,给出具有建议性的取值范围.本文在节点均匀分布的情况下,对其变化规律进行研究并提出了可以保证插值精度的支持域尺寸、节点间距的建议取值.
  • 摘要：研究了一个任意阶自催化反应扩散系统的正平衡态。在解的先验估计基础上，利用隐函数定理及拓扑度理论，获得了该系统非常数正平衡态解的不存在性与存在性结论。结果表明，在一个化学反应系统中，不同的扩散系数或催化剂阶数对系统的模式生成起着不同的作用。%Positive steady states in a reaction-diffusion system with arbitrary powers of autocatalysis are considered. Based on a priori estimates,non-existence and existence of non-constant positive steady state solutions are shown by using implicit function theorem and topological degree theory,respectively. The results show that in a chemical model, different diffusions or autocatalysis orders may play essentially different roles in developing spatial patterns.
  • 摘要：容量是移动通信系统设计中的一个重要因素,该文研究了有限反馈下的MIMO系统容量,给出了确保系统获得正容量增益时所需的最小反馈比特数的表示式。数值计算对比了采用RVQ方法和LBG码本生成方法下的系统容量,并且分别列出了若干天线对和信噪比下所需的最小反馈比特数。结果表明：当反馈比特数大于等于某个门限值,系统将会产生正容量增益,反之相反；整体上来看,RVQ方法优于LBG方法。%Capacity is an important factor in the design of wireless communication systems. The capacity for multiple-input multiple-output (MIMO) with limited feedback is investigated in this paper. The expression of the closed-loop MIMO capacity with limited feedback and the expression of the number of minimum feedback bits are derived so that positive capacity gain is guaranteed. Numerical method is employed to examine the MIMO closed-loop capacities using RVQ and LBG methods, respectively. The number of minimum feedback bits under several antenna pairs and signal to noise ratios (SNRs) has also been provided. The results show that the capacity gain is positive when the number of feedback bits is larger than a threshold,and otherwise the opposite;in general,the RVQ method is superior to LBG method.
  • 摘要：In this paper, the calculation of information entropy of the traditional ID3 algorithm by approximate transformation is simplified. The contribution factor is introduced in this paper to improve the algorithm, aiming at two shortcuts of ID3 algorithm, that is, tending to select more value attributes and have exclusion of attributes whose values are uniformly distributed. It allows the attribute selection method to select division attributes in balance. Through experiment testing, the improved attribute selection method can reduce the classification time, optimize the classification results and reflect the actual situation.%　　对传统ID3算法的信息熵作近似变换达到简化计算的目的，并针对ID3算法倾向于选择取值较多的属性和排斥属性值分布均匀的属性两个缺点，引入贡献因子来改进ID3算法，使属性选择方法平衡的选择划分属性。实验表明，优化后的属性选择方法降低了分类时间，优化了分类结果并能很好地反映实际情况。
  • 摘要：In this paper,the concept of equivalence edge-graceful edge-splitting graph is introduced. The existence of equivalence edge -graceful are discussed and the equivalent method of classification are expound.%　　引进等价边优美边裂图的概念，阐述了等价边优美边裂图的存在性及其等价分类研究的方法。
  • 摘要：竖向荷载作用下，超长桩的受力可以近似按照平面问题求解。本文通过综合分析，采用横向各向同性弹性半空间地基模型，利用局部彼得罗夫-伽辽金法(MLPG)，考虑基桩大变形，编制了实用的计算机程序，并对超长桩在竖向荷载作用下的承载机理做了较深入的分析。%The behavior of super-long pile under simultaneous axial loading can be solved approximately as plain problem. Based on the synthetical studying,an analysis to super-long pile under simultaneous axial loading is advanced by programming the Meshfree local Petrov-Galerkin (MLPG) method in which the layered transversely isotropic and elastic half-space soil model is applied.
  • 摘要：本文利用非参数统计中U统计量的构造方法给出一种检验两总体方差差异的方法，与F检验相比，该方法有更宽泛的适用场合。%Based on the U-statistics, a method about testing variance differences of two populations was proposed. This method can be applied to more general situations than the F testing.
  • 摘要：The fitting of the datum plane is critical to the evaluation of three-dimensional roundness error and the precision of plane fitting can affect the result of roundness. The plane fitting meeting the minimum condition is essential. Therefore,a new algorithm based on the least squares is examined in this paper. After a tiny disturbance on the plane,it converges to the minimum area by finding the plane fitting complying with the principle of minimum condition.%　　三维空间圆度误差评定的关键环节之一是基准平面的拟合，平面拟合的精度直接影响圆度评定结果的精度，只有满足“最小条件”的拟合平面才符合高精基准的要求，故于“最小二乘”拟合平面基础上寻求新算法，继续对平面作有意识的微小扰动，把平面度计算向“最小区域”不断逼近，收敛于真值，求得真正符合“最小条件”的拟合平面。
  • 摘要：Shewanella piezotolerans WP3分离自西太平洋1914 m的深海沉积物中,是一株革兰氏阴性,耐冷、耐压且兼性厌氧的杆状细菌.初步研究证明海洋细菌中含有磺基转移酶(sulfotransferase,ST)活性.本实验中构建了WP3两个磺基转移酶基因的原核表达载体,在E. coli中表达并纯化了重组ST,通过底物的化学反应,证明两个重组磺基转移酶均具有转磺酶活性.研究结果为后续实验的WP3胞外寡糖的离体硫酸化修饰工作奠定了基础.%S.piezotolerans WP3 is psychrotolerant and piezotolerant deep sea bacterium with a broad pressure optimum,extending from atmospheric pressure to about 20 MPa. The sulfotransferase(ST)of the bacterium is studied in this paper. Two genes,Swp1579 and Swp 4147,encoding the STs were cloned by PCR method. The gene Swp 1579 contains an open reading frame (ORF) of 849 bp,encoding a 526 aa putative ST protein, while the ORF of Swp 4147 consists of 1707 bp, encoding 568aa WP3 arylsulfate sulfotransferase. The 900bp and 1700 bp PCR product is obtained and ligated to the pQE30 vector and pQE70 vector,respectively. Utilizing the IPTG treatment,the cloned ST genes was expressed in Escherichia coli M15. The enzymatic activity assays of recombination proteins showed both had ST activities.
  • 摘要：建立了气相色谱-质谱联用(GC-MS)测定木制文具中10种含氯苯酚(三氯苯酚、四氯苯酚、五氯苯酚)的方法.采用甲醇提取试样,含氯苯酚在碳酸钾溶液中经乙酸酐乙酰化后用正己烷萃取,再由气相色谱-质谱联用仪进行测定.含氯苯酚类化合物在0.1 mg/kg耀200.0 mg/kg范围内呈良好线性,相关系数(r)为0.9996耀0.9999,检出限(LOD)均为0.1 mg/kg,加标回收率在88.3~103.6%之间,相对标准偏差(RSD)(n=6)小于6%.结果表明,该方法操作简便,回收率好,重现性好.%A method was developed for the determination of 10 chlorinated phenols (trichloro phenol,tetrachloro phenol,pentachlorophenol) in Wooden stationery by GC-MS. Each sample were extracted with methanol,and the extract was acetylated by the acetic anhydride in potassium carbonate solution. The reacted solution was then extracted by hexane. Finally, the detection was carried out by Gas chromatography -mass spectrometry. The analyte exhibited good linear relationships in the range of 0.1 mg/kg~200.0 mg/kg with correlation coefficients (r) of 0.9996 ~ 0.9999. All the limits of detection (LOD) were 0.1 mg/kg and the spiked recoveries ranged from 88.3% to 103.6%. The relative standard deviation(n=6)is less than 6%. The result shows that the method is convenient,with good recovery and reproducibility.
  • 摘要：A low-cost design of 3G mobile media player in the embedded Linux platform is introduced. First,the driver of AC580 3G network card is implanted in the embedded platform,and 3G network access through PPP dialing is achieved. Second, the source code of the MPlayer is modified and planted in the embedded platform, achieving the fixed playing of the network video on the LCD in no operation interface. Then,a QT interface program is written to control the MPlayer,achieving the visual operation of the player, and meanwhile transplant the QT player in the platform. Finally, the MPlayer and QT program is transplanted in the embedded platform to implement a 3G media player. Test results show that this media player can play streaming media such as web TV online through the 3G network. It’s expected to put into production of mobile TV,online advertising players,etc. after transformation.%　　本文介绍一种廉价的在Linux嵌入式平台下实现移动媒体播放的方案。首先,在嵌入式平台中植入AC5803G网卡驱动,再通过PPP拨号实现3G网络的接入。然后,修改MPlayer源代码并移植到嵌入式平台中,实现在无操作界面下的网络视频LCD定位播放,接着编写一个QT界面程序来控制MPlayer,实现播放器的可视化操作,同时将QT播放器移植到平台中。最后,在嵌入式平台中实现一个利用QT播放器通过3G网络播放网络视频的终端机。实验测试结果表明,本终端可以通过3G网络实现网络电视等网络流媒体的在线点播,经过转化可望投产做成移动电视,网络广告机等终端产品。
  • 摘要：理论上分析了提高功率因数对于节约电能，降低损耗，提高输配电设备的供电能力方面的意义。从无功补偿的作用及效益的角度，探讨了工程施工用电无功补偿的必要性、方式选择、补偿电容量的计算及其功能的实现，以期对工程施工用电及电网发、供电方面具有借鉴和指导作用。%The significance in improving the power factor to save energy,reduce losses and improve the power supply capacity of the power transmission and distribution equipment is analyzed. An intensive study of reactive power compensation in construction electricity is made by analyzing its necessity, modes selection and realization of application from the aspects of effects and benefits. The results are of great significance in practical application of power generation, supply and utilization of the power grid system and have the application prospect of power electronic devices in the dynamic reactive power compensation technology of construction electricity.
  • 摘要：采用反向滴定共沉淀法制备铈铁钇复合氧化物（Ce1- xFexYzO2-λ）载体，然后用等体积浸渍法负载活性组分 Cu，研制铜基铈铁钇复合氧化物（Cuy/Ce1- xFexYzO2-λ）催化剂.实验结果表明：Ce ： Fe ： Y 摩尔比为0.9：0.1：0.05、Cu 负载量为3%时，制得的 Cu3%/Ce0.9Fe0.1Y0.05O2-λ催化剂对 CO、NO 和 C3H6的转化反应具有良好的催化活性，在该催化剂上 CO、NO 和 C3H6的起燃温度（T50）分别为100℃、234℃和258℃，完全转化温度（T90）分别为183℃、318℃和350℃；由于 Fe 和 Y 能与 Ce 氧化物形成稳定的立方晶固溶体，载体表面不出现 Fe、Y或 Cu 物种晶相聚集的现象，Ce 与 Fe 和 Y 之间的良好协同效应有利于提高催化活性和热稳定性，因此 Cu3%/Ce0.9Fe0.1Y0.05O2-λ催化剂性能良好.%The Ce1 -xFexYzO2 -λ composite oxide supporter was prepared by reverse titration co -precipitation method, and then the Cuy/Ce1 - xFexYzO2 - λ catalyst was prepared by equivalent-volume impregnation method to load active component Cu on the supporter. The experimental results indicated that Cu3%/Ce0.9Fe0.1Y0.05O2 - λ catalyst showed favourable catalytic activity on the conversion reaction of CO,NO and C3H6 when the molar ratio of Ce : Fe : Y was 0.9 : 0.1 : 0.05 and the content of Cu was 3%,the light-off temperatures (T50) for CO,NO and C3H6 were 100℃,234℃ and 258℃,and the complete conversion temperature (T90) were 183℃, 318℃ and 350℃ respectively. Because Fe and Y could form stable cubic structure of the solid solution with Ce oxide, and the clustering phenomena of Fe,Y or Cu species crystalline phase on the surface of the support was not existed, the good synergistic effects between Ce, Fe and Y could improve the catalytic activity and thermal stability effectively, consequently the Cuy/Ce1 - xFexYzO2 - λcatalyst exhibited favourable performance.
  • 摘要：针对彩色印刷品表面质量在线检测过程中存在目标图像定位精度低、定位速度慢而导致检测误判率高、检测效率低等问题，提出了一种基于粒子群的彩色图像分层搜索定位新算法.首先采用图像金字塔结构在空间域中对彩色图像进行分层，分析尺度因子和层数的选择对提取目标图像关键特征的影响；其次，基于边缘特征建立各层的匹配模型，最后引入粒子群算法（PSO）求解每层的最优匹配参数，实现待匹配对象的快速定位.实验结果分析表明，该方法对宽幅面彩色印刷品像素大小为1024×454的目标图像平均校正偏差不超过0.1°，即水平方向上的定位误差可达0.017个像素；对角度偏移小于6°的图像，分3层搜索校正的最长时间仅为12.6 ms，以上实验结果显示出该定位方法具有较高的精度和较强的实时性.%In order to solve the problem that the high rate of misdiagnosis and inefficiency in the surface quality online inspection process of color printing due to low accuracy and speed during locating the target image, a new location algorithm is proposed by layering and searching based on particle swarm optimization (PSO) for color printing. Firstly, color printing is layered by image pyramid structure within spatial domain. The selection of scale factor and pyramid layer, which impacts on extracting the key features of target image, is analyzed. Secondly, each level of the color image location model is built based on the edge feature. Thirdly,the optimum parameters of each model are solved by PSO algorithm, and the fast location for matching object is realized. Experimental results show that the average adjusting errors,for the target image of wide color printing of 1024 × 454,are less than 0.1 degree,i.e. the location errors are up to 0.017 pixels in horizontal direction. For color images, the shift angle is less 6 degree,the time of searching and adjusting is only 12.6 ms to its three grey layers. The high accuracy and real-time property are demonstrated.
  • 摘要：尖晶石型铁氧体是一类性能优良的磁性材料，其在实际中被广泛用作为微波吸收剂、磁记录材料和其它功能材料；同时在催化、电子信息和生物技术等领域具有良好的应用前景。由于温室效应日益严重，如何使温室效应的主要成分 CO2气体固定化已成为当今世界各国研究关注的主要课题。本文重点概述了尖晶石型铁氧体（MFe2O4）的制备方法以及催化CO2还原为 C 和 CH4的研究进展。%As a kind of excellent magnetic materials, spinel ferrite can be used as microwave absorber, magnetic recording materials and other functional materials in practical application. Meanwhile, it has also good application prospect in catalyst, electronic information and biology technology fields,etc. Due to the greenhouse effect increasingly serious, how to immobilize CO2 gas which is a major components of the greenhouse effect,has become a focus. The research progress is expounded emphatically for preparation methods of spinel ferrite (MFe2O4) and its catalytic reduction CO2 into C and CH4.
  • 摘要：Slope stability analysis based on reliabilities method which includes the uncertainty of soil parameters is a realistic analysis method. Due to the complicated theory of reliability analysis method and the high requirements of parameters statistics and model calculation,the reliability analysis method is not conductive to engineering application. In order to solve this problem, a simplified method,Taylor series technique, which is summarized by Duncan, is introduced into slope stability reliability analysis. Taylor series technique is a reliability method based on safety factor method, the probability of failure is concluded by the analysis of the uncertainty of concerned parameters in the safety factor method. Firstly,the procedure of applying this method in slope stability analysis is studied. Secondly, the methods of calculating parameters’ standard deviation are summarized. Finally, engineering application shows that Taylor series technique is feasible and practical in slope stability analysis and it provides a new reliability analysis method of slope stability.%　　边坡稳定可靠度分析方法考虑了岩土材料不确定性对边坡稳定的影响，是一种更符合实际情况的分析方法。然而，可靠度分析方法理论较复杂，应用过程中对参数统计、模型计算等方面的要求较高，不利于工程推广。基于此，本文将 Duncan 提出的一种简化可靠度分析方法-泰勒级数法引入到边坡稳定分析中。泰勒级数法是一种基于安全系数法的可靠度分析方法，通过分析安全系数法中所包含各参数不确定性对安全系数的影响，求得边坡稳定失效概率。首先，分析形成了在边坡稳定分析中应用泰勒级数法的基本步骤。继而，通过举例分析了应用泰勒级数法所需参数的标准差求解方法。最后，利用工程实例说明，泰勒级数法在边坡稳定分析中具有较强的可操作性，为边坡稳定可靠度分析提供了一条新的思路。
  • 摘要：In the chart of nuclides with two clusters of deuteron and triton,local areas of stable region take proton numbers Z18, 38, 58 and neutron magic numbers N20,50,82 as boundary. The limiting fold-line extension brings together to nucleus of coordinate S axle, (22,30)(24,30) of H30, and (30,16)~(30,0) of coordinate S30. Scope constant 44 shows out on peripheral coordinates (44,44)(44,22)(22,22)(22,0). In shielding main parts of complex nuclear force interactive among clusters of deuteron and triton, new results of nuclear system may be shown. 28 14 14 14 0 Si%　　在氘氚结团核素图中，稳定区局部区域以质子数 Z =18，38，58与幻数中子数 N =20，50，82为界，稳定区边界折线延伸会合于坐标 S 轴与坐标 H =30与 S =30的坐标（22，30）（24，30）及（30，16）~（30，0）。范围常数44在稳定区外围的坐标（44，44）（44，22）（22，22）（22，0）显示出来。因为在氘氚结团中可能屏蔽了核子间复杂相互作用的主要部分，故能发现核素体系深层本质规律。

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