/**
         * @return the specificHeat
         */
        public double getSpecificHeat() {
                return specificHeat;
        }

        /**
         * @param specificHeat the specificHeat to set
         */
        public void setSpecificHeat(double specificHeat) {
                this.specificHeat = specificHeat;
        }

        /**
         * @return the thermalConductivity
         */
        public double getThermalConductivity() {
                return thermalConductivity;
        }

        /**
         * @param thermalConductivity the thermalConductivity to set
         */
        public void setThermalConductivity(double thermalConductivity) {
                this.thermalConductivity = thermalConductivity;
        }

        private String model;        //导体名称，如 Aluminium, Copper
        private double conductivity;        // 导电率， 这里没有使用 resistivity, 是便于计算
        private double temperatureCoefficient;        //电阻温度系数
        private double density;        // 密度
        private double specificHeat;        //比热容
        private double thermalConductivity;        // 热传导系数